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// @name         OpenAI学习通助手
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// @namespace    https://xuexitong.icollege.top/
// @author       Arthur & NE21
// @description  学习通/超星等网课平台的课程任务辅助工具：自动播放音视频并跟踪任务点、题干字体反混淆、题目图片识别、单选/多选/填空/判断/简答全题型云端智能解答、离线题库缓存、答题进度浮窗。云端解答需在充值中心购买积分或开通月卡。
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// @match        *://*.cqie.cn/*
// @match        *://*.ccqmxx.com/*
// @match        *://*.jxgmxy.com/*
// @match        *://*.jnzyjsxy.cn/*
// @connect      xuexitong.icollege.top
// @connect      www.forestpolice.org
// @run-at       document-end
// @grant        unsafeWindow
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_deleteValue
// @grant        GM_info
// @grant        GM_getResourceText
// @resource     Table https://xuexitong.icollege.top/font/table.json
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// @license      All Rights Reserved
// @antifeature  membership 云端智能解答为付费功能：需在充值中心购买积分或开通 30 天月卡
// @antifeature  payment 积分/月卡通过第三方聚合支付购买
// ==/UserScript==

// ==========================================================
// 全局标识符声明（给静态检查器用，运行期零副作用）
//
// 这些标识符不是普通浏览器全局量，而是：
//   · 脚本管理器注入的沙箱 API（@grant 声明的那几个）；
//   · vendor/ 里本地化的库在拼接后提供的全局量。
// 它们都没法从这段代码里"看"到出处，于是任何对 work.js 做静态检查的工具
// （脚本猫编辑器、VS Code、CI 里的 lint）都会报 no-undef。
// 用 /* global */ 集中声明一次即可，不影响任何运行时行为。
// ==========================================================
/* global unsafeWindow, GM_getValue, GM_setValue, GM_deleteValue, GM_xmlhttpRequest,
          GM_info, GM_getResourceText, jQuery, Ext, define, contextWindow */

//
// 网络访问权限：仅声明脚本真正会访问的两个主机。
//   1) 自有服务（云端解答 / 积分查询 / 云控策略 / 字体映射字典）
//   2) 字体映射字典的第三方保底源
// 旧版本这里是 `@connect *`（放行任意主机），属于过度授权，已收敛。
// 若用户在面板里自定义了 serverUrl，脚本管理器会在首次请求时另行询问。
//
// 更新通道：使用脚本管理器官方机制（安装时由管理器校验 @version 后拉取整包），
// 脚本自身不在运行期下载或执行任何远端代码。
// 注意：本脚本不声明任何 @require —— 所有第三方依赖（jQuery / blueimp-md5 /
// Typr.js）均已本地化到 vendor/ 并内联进本文件，构建期逐个校验 sha256。
/*! ---------------------------------------------------------------------------
 * vendor/10-jquery.js — jQuery 3.7.1 (MIT)
 * 上游: https://cdn.jsdelivr.net/npm/jquery@3.7.1/dist/jquery.min.js
 * 上游 sha256: fc9a93dd241f6b045cbff0481cf4e1901becd0e12fb45166a8f17f95823f0b1a
 *
 * 本文件由 scripts/vendor-deps.js 生成并入库，构建期会校验其 sha256。
 * 本地化的原因：脚本猫审核禁止动态代码下发，脚本不应依赖任何外部代码源；
 * 同时消除 jsDelivr 不可达导致核心功能静默失效的风险。
 * ------------------------------------------------------------------------- */
;(function () {
    // 屏蔽 UMD 的 CommonJS 分支，强制走浏览器分支
    var module, exports;
    /* --- 上游代码开始 --- */
/*! jQuery v3.7.1 | (c) OpenJS Foundation and other contributors | jquery.org/license */
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e?ce.extend({},e):{complete:n||!n&&t||v(e)&&e,duration:e,easing:n&&t||t&&!v(t)&&t};return ce.fx.off?r.duration=0:"number"!=typeof r.duration&&(r.duration in ce.fx.speeds?r.duration=ce.fx.speeds[r.duration]:r.duration=ce.fx.speeds._default),null!=r.queue&&!0!==r.queue||(r.queue="fx"),r.old=r.complete,r.complete=function(){v(r.old)&&r.old.call(this),r.queue&&ce.dequeue(this,r.queue)},r},ce.fn.extend({fadeTo:function(e,t,n,r){return this.filter(ee).css("opacity",0).show().end().animate({opacity:t},e,n,r)},animate:function(t,e,n,r){var i=ce.isEmptyObject(t),o=ce.speed(e,n,r),a=function(){var e=yt(this,ce.extend({},t),o);(i||_.get(this,"finish"))&&e.stop(!0)};return a.finish=a,i||!1===o.queue?this.each(a):this.queue(o.queue,a)},stop:function(i,e,o){var a=function(e){var t=e.stop;delete e.stop,t(o)};return"string"!=typeof i&&(o=e,e=i,i=void 0),e&&this.queue(i||"fx",[]),this.each(function(){var e=!0,t=null!=i&&i+"queueHooks",n=ce.timers,r=_.get(this);if(t)r[t]&&r[t].stop&&a(r[t]);else for(t in r)r[t]&&r[t].stop&&pt.test(t)&&a(r[t]);for(t=n.length;t--;)n[t].elem!==this||null!=i&&n[t].queue!==i||(n[t].anim.stop(o),e=!1,n.splice(t,1));!e&&o||ce.dequeue(this,i)})},finish:function(a){return!1!==a&&(a=a||"fx"),this.each(function(){var e,t=_.get(this),n=t[a+"queue"],r=t[a+"queueHooks"],i=ce.timers,o=n?n.length:0;for(t.finish=!0,ce.queue(this,a,[]),r&&r.stop&&r.stop.call(this,!0),e=i.length;e--;)i[e].elem===this&&i[e].queue===a&&(i[e].anim.stop(!0),i.splice(e,1));for(e=0;e<o;e++)n[e]&&n[e].finish&&n[e].finish.call(this);delete t.finish})}}),ce.each(["toggle","show","hide"],function(e,r){var i=ce.fn[r];ce.fn[r]=function(e,t,n){return null==e||"boolean"==typeof e?i.apply(this,arguments):this.animate(gt(r,!0),e,t,n)}}),ce.each({slideDown:gt("show"),slideUp:gt("hide"),slideToggle:gt("toggle"),fadeIn:{opacity:"show"},fadeOut:{opacity:"hide"},fadeToggle:{opacity:"toggle"}},function(e,r){ce.fn[e]=function(e,t,n){return this.animate(r,e,t,n)}}),ce.timers=[],ce.fx.tick=function(){var e,t=0,n=ce.timers;for(st=Date.now();t<n.length;t++)(e=n[t])()||n[t]!==e||n.splice(t--,1);n.length||ce.fx.stop(),st=void 0},ce.fx.timer=function(e){ce.timers.push(e),ce.fx.start()},ce.fx.interval=13,ce.fx.start=function(){ut||(ut=!0,dt())},ce.fx.stop=function(){ut=null},ce.fx.speeds={slow:600,fast:200,_default:400},ce.fn.delay=function(r,e){return r=ce.fx&&ce.fx.speeds[r]||r,e=e||"fx",this.queue(e,function(e,t){var n=ie.setTimeout(e,r);t.stop=function(){ie.clearTimeout(n)}})},lt=C.createElement("input"),ct=C.createElement("select").appendChild(C.createElement("option")),lt.type="checkbox",le.checkOn=""!==lt.value,le.optSelected=ct.selected,(lt=C.createElement("input")).value="t",lt.type="radio",le.radioValue="t"===lt.value;var mt,xt=ce.expr.attrHandle;ce.fn.extend({attr:function(e,t){return M(this,ce.attr,e,t,1<arguments.length)},removeAttr:function(e){return this.each(function(){ce.removeAttr(this,e)})}}),ce.extend({attr:function(e,t,n){var r,i,o=e.nodeType;if(3!==o&&8!==o&&2!==o)return"undefined"==typeof e.getAttribute?ce.prop(e,t,n):(1===o&&ce.isXMLDoc(e)||(i=ce.attrHooks[t.toLowerCase()]||(ce.expr.match.bool.test(t)?mt:void 0)),void 0!==n?null===n?void ce.removeAttr(e,t):i&&"set"in i&&void 0!==(r=i.set(e,n,t))?r:(e.setAttribute(t,n+""),n):i&&"get"in i&&null!==(r=i.get(e,t))?r:null==(r=ce.find.attr(e,t))?void 0:r)},attrHooks:{type:{set:function(e,t){if(!le.radioValue&&"radio"===t&&fe(e,"input")){var n=e.value;return e.setAttribute("type",t),n&&(e.value=n),t}}}},removeAttr:function(e,t){var n,r=0,i=t&&t.match(D);if(i&&1===e.nodeType)while(n=i[r++])e.removeAttribute(n)}}),mt={set:function(e,t,n){return!1===t?ce.removeAttr(e,n):e.setAttribute(n,n),n}},ce.each(ce.expr.match.bool.source.match(/\w+/g),function(e,t){var a=xt[t]||ce.find.attr;xt[t]=function(e,t,n){var r,i,o=t.toLowerCase();return n||(i=xt[o],xt[o]=r,r=null!=a(e,t,n)?o:null,xt[o]=i),r}});var bt=/^(?:input|select|textarea|button)$/i,wt=/^(?:a|area)$/i;function Tt(e){return(e.match(D)||[]).join(" ")}function Ct(e){return e.getAttribute&&e.getAttribute("class")||""}function kt(e){return Array.isArray(e)?e:"string"==typeof e&&e.match(D)||[]}ce.fn.extend({prop:function(e,t){return M(this,ce.prop,e,t,1<arguments.length)},removeProp:function(e){return this.each(function(){delete this[ce.propFix[e]||e]})}}),ce.extend({prop:function(e,t,n){var r,i,o=e.nodeType;if(3!==o&&8!==o&&2!==o)return 1===o&&ce.isXMLDoc(e)||(t=ce.propFix[t]||t,i=ce.propHooks[t]),void 0!==n?i&&"set"in i&&void 0!==(r=i.set(e,n,t))?r:e[t]=n:i&&"get"in i&&null!==(r=i.get(e,t))?r:e[t]},propHooks:{tabIndex:{get:function(e){var t=ce.find.attr(e,"tabindex");return t?parseInt(t,10):bt.test(e.nodeName)||wt.test(e.nodeName)&&e.href?0:-1}}},propFix:{"for":"htmlFor","class":"className"}}),le.optSelected||(ce.propHooks.selected={get:function(e){var t=e.parentNode;return t&&t.parentNode&&t.parentNode.selectedIndex,null},set:function(e){var t=e.parentNode;t&&(t.selectedIndex,t.parentNode&&t.parentNode.selectedIndex)}}),ce.each(["tabIndex","readOnly","maxLength","cellSpacing","cellPadding","rowSpan","colSpan","useMap","frameBorder","contentEditable"],function(){ce.propFix[this.toLowerCase()]=this}),ce.fn.extend({addClass:function(t){var e,n,r,i,o,a;return v(t)?this.each(function(e){ce(this).addClass(t.call(this,e,Ct(this)))}):(e=kt(t)).length?this.each(function(){if(r=Ct(this),n=1===this.nodeType&&" "+Tt(r)+" "){for(o=0;o<e.length;o++)i=e[o],n.indexOf(" "+i+" ")<0&&(n+=i+" ");a=Tt(n),r!==a&&this.setAttribute("class",a)}}):this},removeClass:function(t){var e,n,r,i,o,a;return v(t)?this.each(function(e){ce(this).removeClass(t.call(this,e,Ct(this)))}):arguments.length?(e=kt(t)).length?this.each(function(){if(r=Ct(this),n=1===this.nodeType&&" "+Tt(r)+" "){for(o=0;o<e.length;o++){i=e[o];while(-1<n.indexOf(" "+i+" "))n=n.replace(" "+i+" "," 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r;if(y(e)?r=e:9===e.nodeType&&(r=e.defaultView),void 0===n)return r?r[i]:e[t];r?r.scrollTo(o?r.pageXOffset:n,o?n:r.pageYOffset):e[t]=n},t,e,arguments.length)}}),ce.each(["top","left"],function(e,n){ce.cssHooks[n]=Ye(le.pixelPosition,function(e,t){if(t)return t=Ge(e,n),_e.test(t)?ce(e).position()[n]+"px":t})}),ce.each({Height:"height",Width:"width"},function(a,s){ce.each({padding:"inner"+a,content:s,"":"outer"+a},function(r,o){ce.fn[o]=function(e,t){var n=arguments.length&&(r||"boolean"!=typeof e),i=r||(!0===e||!0===t?"margin":"border");return M(this,function(e,t,n){var r;return y(e)?0===o.indexOf("outer")?e["inner"+a]:e.document.documentElement["client"+a]:9===e.nodeType?(r=e.documentElement,Math.max(e.body["scroll"+a],r["scroll"+a],e.body["offset"+a],r["offset"+a],r["client"+a])):void 0===n?ce.css(e,t,i):ce.style(e,t,n,i)},s,n?e:void 0,n)}})}),ce.each(["ajaxStart","ajaxStop","ajaxComplete","ajaxError","ajaxSuccess","ajaxSend"],function(e,t){ce.fn[t]=function(e){return this.on(t,e)}}),ce.fn.extend({bind:function(e,t,n){return this.on(e,null,t,n)},unbind:function(e,t){return this.off(e,null,t)},delegate:function(e,t,n,r){return this.on(t,e,n,r)},undelegate:function(e,t,n){return 1===arguments.length?this.off(e,"**"):this.off(t,e||"**",n)},hover:function(e,t){return this.on("mouseenter",e).on("mouseleave",t||e)}}),ce.each("blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu".split(" "),function(e,n){ce.fn[n]=function(e,t){return 0<arguments.length?this.on(n,null,e,t):this.trigger(n)}});var en=/^[\s\uFEFF\xA0]+|([^\s\uFEFF\xA0])[\s\uFEFF\xA0]+$/g;ce.proxy=function(e,t){var n,r,i;if("string"==typeof t&&(n=e[t],t=e,e=n),v(e))return r=ae.call(arguments,2),(i=function(){return e.apply(t||this,r.concat(ae.call(arguments)))}).guid=e.guid=e.guid||ce.guid++,i},ce.holdReady=function(e){e?ce.readyWait++:ce.ready(!0)},ce.isArray=Array.isArray,ce.parseJSON=JSON.parse,ce.nodeName=fe,ce.isFunction=v,ce.isWindow=y,ce.camelCase=F,ce.type=x,ce.now=Date.now,ce.isNumeric=function(e){var t=ce.type(e);return("number"===t||"string"===t)&&!isNaN(e-parseFloat(e))},ce.trim=function(e){return null==e?"":(e+"").replace(en,"$1")},"function"==typeof define&&define.amd&&define("jquery",[],function(){return ce});var tn=ie.jQuery,nn=ie.$;return ce.noConflict=function(e){return ie.$===ce&&(ie.$=nn),e&&ie.jQuery===ce&&(ie.jQuery=tn),ce},"undefined"==typeof e&&(ie.jQuery=ie.$=ce),ce});
    /* --- 上游代码结束 --- */
})();
// 立刻还原 window.jQuery / window.$（不影响宿主页面），仅保留私有引用
var __ne21VendorJQuery = (function () {
    try {
        if (typeof jQuery === 'undefined' || !jQuery) return null;
        return typeof jQuery.noConflict === 'function' ? jQuery.noConflict(true) : jQuery;
    } catch (_) { return null; }
})();
/*! ---------------------------------------------------------------------------
 * vendor/20-md5.js — blueimp-md5 2.19.0 (MIT)
 * 上游: https://cdn.jsdelivr.net/npm/blueimp-md5@2.19.0/js/md5.min.js
 * 上游 sha256: 64d7ded388c562e4bde9e58ce205e5fa01b9734fcd434d496eb7b4fbfe9b927d
 *
 * 本文件由 scripts/vendor-deps.js 生成并入库，构建期会校验其 sha256。
 * 本地化的原因：脚本猫审核禁止动态代码下发，脚本不应依赖任何外部代码源；
 * 同时消除 jsDelivr 不可达导致核心功能静默失效的风险。
 * ------------------------------------------------------------------------- */
// UMD 尾部形如 }(this)，用 sink 承接导出后再提升为顶层 var，
// 这样无论沙箱 global 与 window 是否同一对象都能被引擎取到。
var md5 = (function () {
    var __sink = {};
    (function (__sink) {
        var module, exports, define;
        /* --- 上游代码开始 --- */
!function(n){"use strict";function d(n,t){var r=(65535&n)+(65535&t);return(n>>16)+(t>>16)+(r>>16)<<16|65535&r}function f(n,t,r,e,o,u){return d((u=d(d(t,n),d(e,u)))<<o|u>>>32-o,r)}function l(n,t,r,e,o,u,c){return f(t&r|~t&e,n,t,o,u,c)}function g(n,t,r,e,o,u,c){return f(t&e|r&~e,n,t,o,u,c)}function v(n,t,r,e,o,u,c){return f(t^r^e,n,t,o,u,c)}function m(n,t,r,e,o,u,c){return f(r^(t|~e),n,t,o,u,c)}function c(n,t){var r,e,o,u;n[t>>5]|=128<<t%32,n[14+(t+64>>>9<<4)]=t;for(var c=1732584193,f=-271733879,i=-1732584194,a=271733878,h=0;h<n.length;h+=16)c=l(r=c,e=f,o=i,u=a,n[h],7,-680876936),a=l(a,c,f,i,n[h+1],12,-389564586),i=l(i,a,c,f,n[h+2],17,606105819),f=l(f,i,a,c,n[h+3],22,-1044525330),c=l(c,f,i,a,n[h+4],7,-176418897),a=l(a,c,f,i,n[h+5],12,1200080426),i=l(i,a,c,f,n[h+6],17,-1473231341),f=l(f,i,a,c,n[h+7],22,-45705983),c=l(c,f,i,a,n[h+8],7,1770035416),a=l(a,c,f,i,n[h+9],12,-1958414417),i=l(i,a,c,f,n[h+10],17,-42063),f=l(f,i,a,c,n[h+11],22,-1990404162),c=l(c,f,i,a,n[h+12],7,1804603682),a=l(a,c,f,i,n[h+13],12,-40341101),i=l(i,a,c,f,n[h+14],17,-1502002290),c=g(c,f=l(f,i,a,c,n[h+15],22,1236535329),i,a,n[h+1],5,-165796510),a=g(a,c,f,i,n[h+6],9,-1069501632),i=g(i,a,c,f,n[h+11],14,643717713),f=g(f,i,a,c,n[h],20,-373897302),c=g(c,f,i,a,n[h+5],5,-701558691),a=g(a,c,f,i,n[h+10],9,38016083),i=g(i,a,c,f,n[h+15],14,-660478335),f=g(f,i,a,c,n[h+4],20,-405537848),c=g(c,f,i,a,n[h+9],5,568446438),a=g(a,c,f,i,n[h+14],9,-1019803690),i=g(i,a,c,f,n[h+3],14,-187363961),f=g(f,i,a,c,n[h+8],20,1163531501),c=g(c,f,i,a,n[h+13],5,-1444681467),a=g(a,c,f,i,n[h+2],9,-51403784),i=g(i,a,c,f,n[h+7],14,1735328473),c=v(c,f=g(f,i,a,c,n[h+12],20,-1926607734),i,a,n[h+5],4,-378558),a=v(a,c,f,i,n[h+8],11,-2022574463),i=v(i,a,c,f,n[h+11],16,1839030562),f=v(f,i,a,c,n[h+14],23,-35309556),c=v(c,f,i,a,n[h+1],4,-1530992060),a=v(a,c,f,i,n[h+4],11,1272893353),i=v(i,a,c,f,n[h+7],16,-155497632),f=v(f,i,a,c,n[h+10],23,-1094730640),c=v(c,f,i,a,n[h+13],4,681279174),a=v(a,c,f,i,n[h],11,-358537222),i=v(i,a,c,f,n[h+3],16,-722521979),f=v(f,i,a,c,n[h+6],23,76029189),c=v(c,f,i,a,n[h+9],4,-640364487),a=v(a,c,f,i,n[h+12],11,-421815835),i=v(i,a,c,f,n[h+15],16,530742520),c=m(c,f=v(f,i,a,c,n[h+2],23,-995338651),i,a,n[h],6,-198630844),a=m(a,c,f,i,n[h+7],10,1126891415),i=m(i,a,c,f,n[h+14],15,-1416354905),f=m(f,i,a,c,n[h+5],21,-57434055),c=m(c,f,i,a,n[h+12],6,1700485571),a=m(a,c,f,i,n[h+3],10,-1894986606),i=m(i,a,c,f,n[h+10],15,-1051523),f=m(f,i,a,c,n[h+1],21,-2054922799),c=m(c,f,i,a,n[h+8],6,1873313359),a=m(a,c,f,i,n[h+15],10,-30611744),i=m(i,a,c,f,n[h+6],15,-1560198380),f=m(f,i,a,c,n[h+13],21,1309151649),c=m(c,f,i,a,n[h+4],6,-145523070),a=m(a,c,f,i,n[h+11],10,-1120210379),i=m(i,a,c,f,n[h+2],15,718787259),f=m(f,i,a,c,n[h+9],21,-343485551),c=d(c,r),f=d(f,e),i=d(i,o),a=d(a,u);return[c,f,i,a]}function i(n){for(var t="",r=32*n.length,e=0;e<r;e+=8)t+=String.fromCharCode(n[e>>5]>>>e%32&255);return t}function a(n){var t=[];for(t[(n.length>>2)-1]=void 0,e=0;e<t.length;e+=1)t[e]=0;for(var r=8*n.length,e=0;e<r;e+=8)t[e>>5]|=(255&n.charCodeAt(e/8))<<e%32;return t}function e(n){for(var t,r="0123456789abcdef",e="",o=0;o<n.length;o+=1)t=n.charCodeAt(o),e+=r.charAt(t>>>4&15)+r.charAt(15&t);return e}function r(n){return unescape(encodeURIComponent(n))}function o(n){return i(c(a(n=r(n)),8*n.length))}function u(n,t){return function(n,t){var r,e=a(n),o=[],u=[];for(o[15]=u[15]=void 0,16<e.length&&(e=c(e,8*n.length)),r=0;r<16;r+=1)o[r]=909522486^e[r],u[r]=1549556828^e[r];return t=c(o.concat(a(t)),512+8*t.length),i(c(u.concat(t),640))}(r(n),r(t))}function t(n,t,r){return t?r?u(t,n):e(u(t,n)):r?o(n):e(o(n))}"function"==typeof define&&define.amd?define(function(){return t}):"object"==typeof module&&module.exports?module.exports=t:n.md5=t}(this);
//# sourceMappingURL=md5.min.js.map
        /* --- 上游代码结束 --- */
    }).call(__sink, __sink);
    return __sink.md5;
})();
/*! ---------------------------------------------------------------------------
 * vendor/30-typr.js — Typr.js 15aa12f (MIT)
 * 上游: https://raw.githubusercontent.com/photopea/Typr.js/15aa12ffa6cf39e8788562ea4af65b42317375fb/src/Typr.js
 * 上游 sha256: e906fc581293ebb6c005e472f7d5b038ca9c8f6e40927ad450ba90f8b7377971
 *
 * 本文件由 scripts/vendor-deps.js 生成并入库，构建期会校验其 sha256。
 * 本地化的原因：脚本猫审核禁止动态代码下发，脚本不应依赖任何外部代码源；
 * 同时消除 jsDelivr 不可达导致核心功能静默失效的风险。
 * ------------------------------------------------------------------------- */
/* --- 上游代码开始 --- */
var Typr={};Typr.parse=function(buff){var readFont=function(data2,idx,offset2,tmap2){var bin2=Typr.B,T=Typr.T,prsr={cmap:T.cmap,head:T.head,hhea:T.hhea,maxp:T.maxp,hmtx:T.hmtx,name:T.name,"OS/2":T.OS2,post:T.post,loca:T.loca,kern:T.kern,glyf:T.glyf,"CFF ":T.CFF,"SVG ":T.SVG},obj={_data:data2,_index:idx,_offset:offset2};for(var t in prsr){var tab=Typr.findTable(data2,t,offset2);if(tab){var off=tab[0],tobj=tmap2[off];tobj==null&&(tobj=prsr[t].parseTab(data2,off,tab[1],obj)),obj[t]=tmap2[off]=tobj}}return obj},bin=Typr.B,data=new Uint8Array(buff),tmap={},tag=bin.readASCII(data,0,4);if(tag=="ttcf"){var offset=4,majV=bin.readUshort(data,offset);offset+=2;var minV=bin.readUshort(data,offset);offset+=2;var numF=bin.readUint(data,offset);offset+=4;for(var fnts=[],i=0;i<numF;i++){var foff=bin.readUint(data,offset);offset+=4,fnts.push(readFont(data,i,foff,tmap))}return fnts}else return[readFont(data,0,0,tmap)]},Typr.findTable=function(data,tab,foff){for(var bin=Typr.B,numTables=bin.readUshort(data,foff+4),offset=foff+12,i=0;i<numTables;i++){var tag=bin.readASCII(data,offset,4),checkSum=bin.readUint(data,offset+4),toffset=bin.readUint(data,offset+8),length=bin.readUint(data,offset+12);if(tag==tab)return[toffset,length];offset+=16}return null},Typr.T={},Typr.B={readFixed:function(data,o){return(data[o]<<8|data[o+1])+(data[o+2]<<8|data[o+3])/(256*256+4)},readF2dot14:function(data,o){var num=Typr.B.readShort(data,o);return num/16384},readInt:function(buff,p){var a=Typr.B.t.uint8;return a[0]=buff[p+3],a[1]=buff[p+2],a[2]=buff[p+1],a[3]=buff[p],Typr.B.t.int32[0]},readInt8:function(buff,p){var a=Typr.B.t.uint8;return a[0]=buff[p],Typr.B.t.int8[0]},readShort:function(buff,p){var a=Typr.B.t.uint8;return a[1]=buff[p],a[0]=buff[p+1],Typr.B.t.int16[0]},readUshort:function(buff,p){return buff[p]<<8|buff[p+1]},writeUshort:function(buff,p,n){buff[p]=n>>8&255,buff[p+1]=n&255},readUshorts:function(buff,p,len){for(var arr=[],i=0;i<len;i++){var v=Typr.B.readUshort(buff,p+i*2);arr.push(v)}return arr},readUint:function(buff,p){var a=Typr.B.t.uint8;return a[3]=buff[p],a[2]=buff[p+1],a[1]=buff[p+2],a[0]=buff[p+3],Typr.B.t.uint32[0]},writeUint:function(buff,p,n){buff[p]=n>>24&255,buff[p+1]=n>>16&255,buff[p+2]=n>>8&255,buff[p+3]=n>>0&255},readUint64:function(buff,p){return Typr.B.readUint(buff,p)*4294967296+Typr.B.readUint(buff,p+4)},readASCII:function(buff,p,l){for(var s="",i=0;i<l;i++)s+=String.fromCharCode(buff[p+i]);return s},writeASCII:function(buff,p,s){for(var i=0;i<s.length;i++)buff[p+i]=s.charCodeAt(i)},readUnicode:function(buff,p,l){for(var s="",i=0;i<l;i++){var c=buff[p++]<<8|buff[p++];s+=String.fromCharCode(c)}return s},_tdec:window.TextDecoder?new window.TextDecoder:null,readUTF8:function(buff,p,l){var tdec=Typr.B._tdec;return tdec&&p==0&&l==buff.length?tdec.decode(buff):Typr.B.readASCII(buff,p,l)},readBytes:function(buff,p,l){for(var arr=[],i=0;i<l;i++)arr.push(buff[p+i]);return arr},readASCIIArray:function(buff,p,l){for(var s=[],i=0;i<l;i++)s.push(String.fromCharCode(buff[p+i]));return s},t:(function(){var ab=new ArrayBuffer(8);return{buff:ab,int8:new Int8Array(ab),uint8:new Uint8Array(ab),int16:new Int16Array(ab),uint16:new Uint16Array(ab),int32:new Int32Array(ab),uint32:new Uint32Array(ab)}})()},Typr.T.CFF={parseTab:function(data,offset,length){var bin=Typr.B,CFF=Typr.T.CFF;data=new Uint8Array(data.buffer,offset,length),offset=0;var major=data[offset];offset++;var minor=data[offset];offset++;var hdrSize=data[offset];offset++;var offsize=data[offset];offset++;var ninds=[];offset=CFF.readIndex(data,offset,ninds);for(var names=[],i=0;i<ninds.length-1;i++)names.push(bin.readASCII(data,offset+ninds[i],ninds[i+1]-ninds[i]));offset+=ninds[ninds.length-1];var tdinds=[];offset=CFF.readIndex(data,offset,tdinds);for(var topDicts=[],i=0;i<tdinds.length-1;i++)topDicts.push(CFF.readDict(data,offset+tdinds[i],offset+tdinds[i+1]));offset+=tdinds[tdinds.length-1];var topdict=topDicts[0],sinds=[];offset=CFF.readIndex(data,offset,sinds);for(var strings=[],i=0;i<sinds.length-1;i++)strings.push(bin.readASCII(data,offset+sinds[i],sinds[i+1]-sinds[i]));if(offset+=sinds[sinds.length-1],CFF.readSubrs(data,offset,topdict),topdict.CharStrings&&(topdict.CharStrings=CFF.readBytes(data,topdict.CharStrings)),topdict.ROS){offset=topdict.FDArray;var fdind=[];offset=CFF.readIndex(data,offset,fdind),topdict.FDArray=[];for(var i=0;i<fdind.length-1;i++){var dict=CFF.readDict(data,offset+fdind[i],offset+fdind[i+1]);CFF._readFDict(data,dict,strings),topdict.FDArray.push(dict)}offset+=fdind[fdind.length-1],offset=topdict.FDSelect,topdict.FDSelect=[];var fmt=data[offset];if(offset++,fmt==3){var rns=bin.readUshort(data,offset);offset+=2;for(var i=0;i<rns+1;i++)topdict.FDSelect.push(bin.readUshort(data,offset),data[offset+2]),offset+=3}else throw fmt}return topdict.charset&&(topdict.charset=CFF.readCharset(data,topdict.charset,topdict.CharStrings.length)),CFF._readFDict(data,topdict,strings),topdict},_readFDict:function(data,dict,ss){var CFF=Typr.T.CFF,offset;dict.Private&&(offset=dict.Private[1],dict.Private=CFF.readDict(data,offset,offset+dict.Private[0]),dict.Private.Subrs&&CFF.readSubrs(data,offset+dict.Private.Subrs,dict.Private));for(var p in dict)["FamilyName","FontName","FullName","Notice","version","Copyright"].indexOf(p)!=-1&&(dict[p]=ss[dict[p]-426+35])},readSubrs:function(data,offset,obj){obj.Subrs=Typr.T.CFF.readBytes(data,offset);var bias,nSubrs=obj.Subrs.length+1;nSubrs<1240?bias=107:nSubrs<33900?bias=1131:bias=32768,obj.Bias=bias},readBytes:function(data,offset){var bin=Typr.B,arr=[];offset=Typr.T.CFF.readIndex(data,offset,arr);for(var subrs=[],arl=arr.length-1,no=data.byteOffset+offset,i=0;i<arl;i++){var ari=arr[i];subrs.push(new Uint8Array(data.buffer,no+ari,arr[i+1]-ari))}return subrs},tableSE:[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,93,94,95,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,96,97,98,99,100,101,102,103,104,105,106,107,108,109,110,0,111,112,113,114,0,115,116,117,118,119,120,121,122,0,123,0,124,125,126,127,128,129,130,131,0,132,133,0,134,135,136,137,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,138,0,139,0,0,0,0,140,141,142,143,0,0,0,0,0,144,0,0,0,145,0,0,146,147,148,149,0,0,0,0],glyphByUnicode:function(cff,code){for(var i=0;i<cff.charset.length;i++)if(cff.charset[i]==code)return i;return-1},glyphBySE:function(cff,charcode){return charcode<0||charcode>255?-1:Typr.T.CFF.glyphByUnicode(cff,Typr.T.CFF.tableSE[charcode])},readCharset:function(data,offset,num){var bin=Typr.B,charset=[".notdef"],format=data[offset];if(offset++,format==0)for(var i=0;i<num;i++){var first=bin.readUshort(data,offset);offset+=2,charset.push(first)}else if(format==1||format==2)for(;charset.length<num;){var first=bin.readUshort(data,offset);offset+=2;var nLeft=0;format==1?(nLeft=data[offset],offset++):(nLeft=bin.readUshort(data,offset),offset+=2);for(var i=0;i<=nLeft;i++)charset.push(first),first++}else throw"error: format: "+format;return charset},readIndex:function(data,offset,inds){var bin=Typr.B,count=bin.readUshort(data,offset)+1;offset+=2;var offsize=data[offset];if(offset++,offsize==1)for(var i=0;i<count;i++)inds.push(data[offset+i]);else if(offsize==2)for(var i=0;i<count;i++)inds.push(bin.readUshort(data,offset+i*2));else if(offsize==3)for(var i=0;i<count;i++)inds.push(bin.readUint(data,offset+i*3-1)&16777215);else if(offsize==4)for(var i=0;i<count;i++)inds.push(bin.readUint(data,offset+i*4));else if(count!=1)throw"unsupported offset size: "+offsize+", count: "+count;return offset+=count*offsize,offset-1},getCharString:function(data,offset,o){var bin=Typr.B,b0=data[offset],b1=data[offset+1],b2=data[offset+2],b3=data[offset+3],b4=data[offset+4],vs=1,op=null,val=null;b0<=20&&(op=b0,vs=1),b0==12&&(op=b0*100+b1,vs=2),21<=b0&&b0<=27&&(op=b0,vs=1),b0==28&&(val=bin.readShort(data,offset+1),vs=3),29<=b0&&b0<=31&&(op=b0,vs=1),32<=b0&&b0<=246&&(val=b0-139,vs=1),247<=b0&&b0<=250&&(val=(b0-247)*256+b1+108,vs=2),251<=b0&&b0<=254&&(val=-(b0-251)*256-b1-108,vs=2),b0==255&&(val=bin.readInt(data,offset+1)/65535,vs=5),o.val=val??"o"+op,o.size=vs},readCharString:function(data,offset,length){for(var end=offset+length,bin=Typr.B,arr=[];offset<end;){var b0=data[offset],b1=data[offset+1],b2=data[offset+2],b3=data[offset+3],b4=data[offset+4],vs=1,op=null,val=null;b0<=20&&(op=b0,vs=1),b0==12&&(op=b0*100+b1,vs=2),(b0==19||b0==20)&&(op=b0,vs=2),21<=b0&&b0<=27&&(op=b0,vs=1),b0==28&&(val=bin.readShort(data,offset+1),vs=3),29<=b0&&b0<=31&&(op=b0,vs=1),32<=b0&&b0<=246&&(val=b0-139,vs=1),247<=b0&&b0<=250&&(val=(b0-247)*256+b1+108,vs=2),251<=b0&&b0<=254&&(val=-(b0-251)*256-b1-108,vs=2),b0==255&&(val=bin.readInt(data,offset+1)/65535,vs=5),arr.push(val??"o"+op),offset+=vs}return arr},readDict:function(data,offset,end){for(var bin=Typr.B,dict={},carr=[];offset<end;){var b0=data[offset],b1=data[offset+1],b2=data[offset+2],b3=data[offset+3],b4=data[offset+4],vs=1,key=null,val=null;if(b0==28&&(val=bin.readShort(data,offset+1),vs=3),b0==29&&(val=bin.readInt(data,offset+1),vs=5),32<=b0&&b0<=246&&(val=b0-139,vs=1),247<=b0&&b0<=250&&(val=(b0-247)*256+b1+108,vs=2),251<=b0&&b0<=254&&(val=-(b0-251)*256-b1-108,vs=2),b0==255)throw val=bin.readInt(data,offset+1)/65535,vs=5,"unknown number";if(b0==30){var nibs=[];for(vs=1;;){var b=data[offset+vs];vs++;var nib0=b>>4,nib1=b&15;if(nib0!=15&&nibs.push(nib0),nib1!=15&&nibs.push(nib1),nib1==15)break}for(var s="",chars=[0,1,2,3,4,5,6,7,8,9,".","e","e-","reserved","-","endOfNumber"],i=0;i<nibs.length;i++)s+=chars[nibs[i]];val=parseFloat(s)}if(b0<=21){var keys=["version","Notice","FullName","FamilyName","Weight","FontBBox","BlueValues","OtherBlues","FamilyBlues","FamilyOtherBlues","StdHW","StdVW","escape","UniqueID","XUID","charset","Encoding","CharStrings","Private","Subrs","defaultWidthX","nominalWidthX"];if(key=keys[b0],vs=1,b0==12){var keys=["Copyright","isFixedPitch","ItalicAngle","UnderlinePosition","UnderlineThickness","PaintType","CharstringType","FontMatrix","StrokeWidth","BlueScale","BlueShift","BlueFuzz","StemSnapH","StemSnapV","ForceBold","","","LanguageGroup","ExpansionFactor","initialRandomSeed","SyntheticBase","PostScript","BaseFontName","BaseFontBlend","","","","","","","ROS","CIDFontVersion","CIDFontRevision","CIDFontType","CIDCount","UIDBase","FDArray","FDSelect","FontName"];key=keys[b1],vs=2}}key!=null?(dict[key]=carr.length==1?carr[0]:carr,carr=[]):carr.push(val),offset+=vs}return dict}},Typr.T.cmap={parseTab:function(data,offset,length){var obj={tables:[],ids:{},off:offset};data=new Uint8Array(data.buffer,offset,length),offset=0;var offset0=offset,bin=Typr.B,rU=bin.readUshort,cmap=Typr.T.cmap,version=rU(data,offset);offset+=2;var numTables=rU(data,offset);offset+=2;for(var offs=[],i=0;i<numTables;i++){var platformID=rU(data,offset);offset+=2;var encodingID=rU(data,offset);offset+=2;var noffset=bin.readUint(data,offset);offset+=4;var id="p"+platformID+"e"+encodingID,tind=offs.indexOf(noffset);if(tind==-1){tind=obj.tables.length;var subt={};offs.push(noffset);var format=subt.format=rU(data,noffset);format==0?subt=cmap.parse0(data,noffset,subt):format==4?subt=cmap.parse4(data,noffset,subt):format==6?subt=cmap.parse6(data,noffset,subt):format==12&&(subt=cmap.parse12(data,noffset,subt)),obj.tables.push(subt)}if(obj.ids[id]!=null)throw"multiple tables for one platform+encoding";obj.ids[id]=tind}return obj},parse0:function(data,offset,obj){var bin=Typr.B;offset+=2;var len=bin.readUshort(data,offset);offset+=2;var lang=bin.readUshort(data,offset);offset+=2,obj.map=[];for(var i=0;i<len-6;i++)obj.map.push(data[offset+i]);return obj},parse4:function(data,offset,obj){var bin=Typr.B,rU=bin.readUshort,rUs=bin.readUshorts,offset0=offset;offset+=2;var length=rU(data,offset);offset+=2;var language=rU(data,offset);offset+=2;var segCountX2=rU(data,offset);offset+=2;var segCount=segCountX2>>>1;obj.searchRange=rU(data,offset),offset+=2,obj.entrySelector=rU(data,offset),offset+=2,obj.rangeShift=rU(data,offset),offset+=2,obj.endCount=rUs(data,offset,segCount),offset+=segCount*2,offset+=2,obj.startCount=rUs(data,offset,segCount),offset+=segCount*2,obj.idDelta=[];for(var i=0;i<segCount;i++)obj.idDelta.push(bin.readShort(data,offset)),offset+=2;return obj.idRangeOffset=rUs(data,offset,segCount),offset+=segCount*2,obj.glyphIdArray=rUs(data,offset,offset0+length-offset>>>1),obj},parse6:function(data,offset,obj){var bin=Typr.B,offset0=offset;offset+=2;var length=bin.readUshort(data,offset);offset+=2;var language=bin.readUshort(data,offset);offset+=2,obj.firstCode=bin.readUshort(data,offset),offset+=2;var entryCount=bin.readUshort(data,offset);offset+=2,obj.glyphIdArray=[];for(var i=0;i<entryCount;i++)obj.glyphIdArray.push(bin.readUshort(data,offset)),offset+=2;return obj},parse12:function(data,offset,obj){var bin=Typr.B,rU=bin.readUint,offset0=offset;offset+=4;var length=rU(data,offset);offset+=4;var lang=rU(data,offset);offset+=4;var nGroups=rU(data,offset)*3;offset+=4;for(var gps=obj.groups=new Uint32Array(nGroups),i=0;i<nGroups;i+=3)gps[i]=rU(data,offset+(i<<2)),gps[i+1]=rU(data,offset+(i<<2)+4),gps[i+2]=rU(data,offset+(i<<2)+8);return obj}},Typr.T.glyf={parseTab:function(data,offset,length,font){for(var obj=[],ng=font.maxp.numGlyphs,g=0;g<ng;g++)obj.push(null);return obj},_parseGlyf:function(font,g){var bin=Typr.B,data=font._data,loca=font.loca;if(loca[g]==loca[g+1])return null;var offset=Typr.findTable(data,"glyf",font._offset)[0]+loca[g],gl={};if(gl.noc=bin.readShort(data,offset),offset+=2,gl.xMin=bin.readShort(data,offset),offset+=2,gl.yMin=bin.readShort(data,offset),offset+=2,gl.xMax=bin.readShort(data,offset),offset+=2,gl.yMax=bin.readShort(data,offset),offset+=2,gl.xMin>=gl.xMax||gl.yMin>=gl.yMax)return null;if(gl.noc>0){gl.endPts=[];for(var i=0;i<gl.noc;i++)gl.endPts.push(bin.readUshort(data,offset)),offset+=2;var instructionLength=bin.readUshort(data,offset);if(offset+=2,data.length-offset<instructionLength)return null;gl.instructions=bin.readBytes(data,offset,instructionLength),offset+=instructionLength;var crdnum=gl.endPts[gl.noc-1]+1;gl.flags=[];for(var i=0;i<crdnum;i++){var flag=data[offset];if(offset++,gl.flags.push(flag),(flag&8)!=0){var rep=data[offset];offset++;for(var j=0;j<rep;j++)gl.flags.push(flag),i++}}gl.xs=[];for(var i=0;i<crdnum;i++){var i8=(gl.flags[i]&2)!=0,same=(gl.flags[i]&16)!=0;i8?(gl.xs.push(same?data[offset]:-data[offset]),offset++):same?gl.xs.push(0):(gl.xs.push(bin.readShort(data,offset)),offset+=2)}gl.ys=[];for(var i=0;i<crdnum;i++){var i8=(gl.flags[i]&4)!=0,same=(gl.flags[i]&32)!=0;i8?(gl.ys.push(same?data[offset]:-data[offset]),offset++):same?gl.ys.push(0):(gl.ys.push(bin.readShort(data,offset)),offset+=2)}for(var x=0,y=0,i=0;i<crdnum;i++)x+=gl.xs[i],y+=gl.ys[i],gl.xs[i]=x,gl.ys[i]=y}else{var ARG_1_AND_2_ARE_WORDS=1,ARGS_ARE_XY_VALUES=2,ROUND_XY_TO_GRID=4,WE_HAVE_A_SCALE=8,RESERVED=16,MORE_COMPONENTS=32,WE_HAVE_AN_X_AND_Y_SCALE=64,WE_HAVE_A_TWO_BY_TWO=128,WE_HAVE_INSTRUCTIONS=256,USE_MY_METRICS=512,OVERLAP_COMPOUND=1024,SCALED_COMPONENT_OFFSET=2048,UNSCALED_COMPONENT_OFFSET=4096;gl.parts=[];var flags;do{flags=bin.readUshort(data,offset),offset+=2;var part={m:{a:1,b:0,c:0,d:1,tx:0,ty:0},p1:-1,p2:-1};if(gl.parts.push(part),part.glyphIndex=bin.readUshort(data,offset),offset+=2,flags&ARG_1_AND_2_ARE_WORDS){var arg1=bin.readShort(data,offset);offset+=2;var arg2=bin.readShort(data,offset);offset+=2}else{var arg1=bin.readInt8(data,offset);offset++;var arg2=bin.readInt8(data,offset);offset++}flags&ARGS_ARE_XY_VALUES?(part.m.tx=arg1,part.m.ty=arg2):(part.p1=arg1,part.p2=arg2),flags&WE_HAVE_A_SCALE?(part.m.a=part.m.d=bin.readF2dot14(data,offset),offset+=2):flags&WE_HAVE_AN_X_AND_Y_SCALE?(part.m.a=bin.readF2dot14(data,offset),offset+=2,part.m.d=bin.readF2dot14(data,offset),offset+=2):flags&WE_HAVE_A_TWO_BY_TWO&&(part.m.a=bin.readF2dot14(data,offset),offset+=2,part.m.b=bin.readF2dot14(data,offset),offset+=2,part.m.c=bin.readF2dot14(data,offset),offset+=2,part.m.d=bin.readF2dot14(data,offset),offset+=2)}while(flags&MORE_COMPONENTS);if(flags&WE_HAVE_INSTRUCTIONS){var numInstr=bin.readUshort(data,offset);offset+=2,gl.instr=[];for(var i=0;i<numInstr;i++)gl.instr.push(data[offset]),offset++}}return gl}},Typr.T.head={parseTab:function(data,offset,length){var bin=Typr.B,obj={},tableVersion=bin.readFixed(data,offset);offset+=4,obj.fontRevision=bin.readFixed(data,offset),offset+=4;var checkSumAdjustment=bin.readUint(data,offset);offset+=4;var magicNumber=bin.readUint(data,offset);return offset+=4,obj.flags=bin.readUshort(data,offset),offset+=2,obj.unitsPerEm=bin.readUshort(data,offset),offset+=2,obj.created=bin.readUint64(data,offset),offset+=8,obj.modified=bin.readUint64(data,offset),offset+=8,obj.xMin=bin.readShort(data,offset),offset+=2,obj.yMin=bin.readShort(data,offset),offset+=2,obj.xMax=bin.readShort(data,offset),offset+=2,obj.yMax=bin.readShort(data,offset),offset+=2,obj.macStyle=bin.readUshort(data,offset),offset+=2,obj.lowestRecPPEM=bin.readUshort(data,offset),offset+=2,obj.fontDirectionHint=bin.readShort(data,offset),offset+=2,obj.indexToLocFormat=bin.readShort(data,offset),offset+=2,obj.glyphDataFormat=bin.readShort(data,offset),offset+=2,obj}},Typr.T.hhea={parseTab:function(data,offset,length){var bin=Typr.B,obj={},tableVersion=bin.readFixed(data,offset);offset+=4;for(var keys=["ascender","descender","lineGap","advanceWidthMax","minLeftSideBearing","minRightSideBearing","xMaxExtent","caretSlopeRise","caretSlopeRun","caretOffset","res0","res1","res2","res3","metricDataFormat","numberOfHMetrics"],i=0;i<keys.length;i++){var key=keys[i],func=key=="advanceWidthMax"||key=="numberOfHMetrics"?bin.readUshort:bin.readShort;obj[key]=func(data,offset+i*2)}return obj}},Typr.T.hmtx={parseTab:function(data,offset,length,font){for(var bin=Typr.B,aWidth=[],lsBearing=[],nG=font.maxp.numGlyphs,nH=font.hhea.numberOfHMetrics,aw=0,lsb=0,i=0;i<nH;)aw=bin.readUshort(data,offset+(i<<2)),lsb=bin.readShort(data,offset+(i<<2)+2),aWidth.push(aw),lsBearing.push(lsb),i++;for(;i<nG;)aWidth.push(aw),lsBearing.push(lsb),i++;return{aWidth,lsBearing}}},Typr.T.kern={parseTab:function(data,offset,length,font){var bin=Typr.B,kern=Typr.T.kern,version=bin.readUshort(data,offset);if(version==1)return kern.parseV1(data,offset,length,font);var nTables=bin.readUshort(data,offset+2);offset+=4;for(var map={glyph1:[],rval:[]},i=0;i<nTables;i++){offset+=2;var length=bin.readUshort(data,offset);offset+=2;var coverage=bin.readUshort(data,offset);offset+=2;var format=coverage>>>8;format&=15,format==0&&(offset=kern.readFormat0(data,offset,map))}return map},parseV1:function(data,offset,length,font){var bin=Typr.B,kern=Typr.T.kern,version=bin.readFixed(data,offset),nTables=bin.readUint(data,offset+4);offset+=8;for(var map={glyph1:[],rval:[]},i=0;i<nTables;i++){var length=bin.readUint(data,offset);offset+=4;var coverage=bin.readUshort(data,offset);offset+=2;var tupleIndex=bin.readUshort(data,offset);offset+=2;var format=coverage&255;format==0&&(offset=kern.readFormat0(data,offset,map))}return map},readFormat0:function(data,offset,map){var bin=Typr.B,rUs=bin.readUshort,pleft=-1,nPairs=rUs(data,offset),searchRange=rUs(data,offset+2),entrySelector=rUs(data,offset+4),rangeShift=rUs(data,offset+6);offset+=8;for(var j=0;j<nPairs;j++){var left=rUs(data,offset);offset+=2;var right=rUs(data,offset);offset+=2;var value=bin.readShort(data,offset);offset+=2,left!=pleft&&(map.glyph1.push(left),map.rval.push({glyph2:[],vals:[]}));var rval=map.rval[map.rval.length-1];rval.glyph2.push(right),rval.vals.push(value),pleft=left}return offset}},Typr.T.loca={parseTab:function(data,offset,length,font){var bin=Typr.B,obj=[],ver=font.head.indexToLocFormat,len=font.maxp.numGlyphs+1;if(ver==0)for(var i=0;i<len;i++)obj.push(bin.readUshort(data,offset+(i<<1))<<1);if(ver==1)for(var i=0;i<len;i++)obj.push(bin.readUint(data,offset+(i<<2)));return obj}},Typr.T.maxp={parseTab:function(data,offset,length){var bin=Typr.B,rU=bin.readUshort,obj={},ver=bin.readUint(data,offset);return offset+=4,obj.numGlyphs=rU(data,offset),offset+=2,obj}},Typr.T.name={parseTab:function(data,offset,length){var bin=Typr.B,obj={},format=bin.readUshort(data,offset);offset+=2;var count=bin.readUshort(data,offset);offset+=2;var stringOffset=bin.readUshort(data,offset);offset+=2;for(var names=["copyright","fontFamily","fontSubfamily","ID","fullName","version","postScriptName","trademark","manufacturer","designer","description","urlVendor","urlDesigner","licence","licenceURL","---","typoFamilyName","typoSubfamilyName","compatibleFull","sampleText","postScriptCID","wwsFamilyName","wwsSubfamilyName","lightPalette","darkPalette"],offset0=offset,rU=bin.readUshort,i=0;i<count;i++){var platformID=rU(data,offset);offset+=2;var encodingID=rU(data,offset);offset+=2;var languageID=rU(data,offset);offset+=2;var nameID=rU(data,offset);offset+=2;var slen=rU(data,offset);offset+=2;var noffset=rU(data,offset);offset+=2;var soff=offset0+count*12+noffset,str;platformID==0||platformID==3&&encodingID==0?str=bin.readUnicode(data,soff,slen/2):encodingID==0?str=bin.readASCII(data,soff,slen):encodingID==1||encodingID==3||encodingID==4||encodingID==10?str=bin.readUnicode(data,soff,slen/2):platformID==1?(str=bin.readASCII(data,soff,slen),console.log("reading unknown MAC encoding "+encodingID+" as ASCII")):(console.log("unknown encoding "+encodingID+", platformID: "+platformID),str=bin.readASCII(data,soff,slen));var tid="p"+platformID+","+languageID.toString(16);obj[tid]==null&&(obj[tid]={}),obj[tid][names[nameID]]=str,obj[tid]._lang=languageID}var psn="postScriptName";for(var p in obj)if(obj[p][psn]!=null&&obj[p]._lang==1033)return obj[p];for(var p in obj)if(obj[p][psn]!=null&&obj[p]._lang==0)return obj[p];for(var p in obj)if(obj[p][psn]!=null&&obj[p]._lang==3084)return obj[p];for(var p in obj)if(obj[p][psn]!=null)return obj[p];var out;for(var p in obj){out=obj[p];break}return console.log("returning name table with languageID "+out._lang),out[psn]==null&&out.ID!=null&&(out[psn]=out.ID),out}},Typr.T.OS2={parseTab:function(data,offset,length){var bin=Typr.B,ver=bin.readUshort(data,offset);offset+=2;var OS2=Typr.T.OS2,obj={};if(ver==0)OS2.version0(data,offset,obj);else if(ver==1)OS2.version1(data,offset,obj);else if(ver==2||ver==3||ver==4)OS2.version2(data,offset,obj);else if(ver==5)OS2.version5(data,offset,obj);else throw"unknown OS/2 table version: "+ver;return obj},version0:function(data,offset,obj){var bin=Typr.B;return obj.xAvgCharWidth=bin.readShort(data,offset),offset+=2,obj.usWeightClass=bin.readUshort(data,offset),offset+=2,obj.usWidthClass=bin.readUshort(data,offset),offset+=2,obj.fsType=bin.readUshort(data,offset),offset+=2,obj.ySubscriptXSize=bin.readShort(data,offset),offset+=2,obj.ySubscriptYSize=bin.readShort(data,offset),offset+=2,obj.ySubscriptXOffset=bin.readShort(data,offset),offset+=2,obj.ySubscriptYOffset=bin.readShort(data,offset),offset+=2,obj.ySuperscriptXSize=bin.readShort(data,offset),offset+=2,obj.ySuperscriptYSize=bin.readShort(data,offset),offset+=2,obj.ySuperscriptXOffset=bin.readShort(data,offset),offset+=2,obj.ySuperscriptYOffset=bin.readShort(data,offset),offset+=2,obj.yStrikeoutSize=bin.readShort(data,offset),offset+=2,obj.yStrikeoutPosition=bin.readShort(data,offset),offset+=2,obj.sFamilyClass=bin.readShort(data,offset),offset+=2,obj.panose=bin.readBytes(data,offset,10),offset+=10,obj.ulUnicodeRange1=bin.readUint(data,offset),offset+=4,obj.ulUnicodeRange2=bin.readUint(data,offset),offset+=4,obj.ulUnicodeRange3=bin.readUint(data,offset),offset+=4,obj.ulUnicodeRange4=bin.readUint(data,offset),offset+=4,obj.achVendID=bin.readASCII(data,offset,4),offset+=4,obj.fsSelection=bin.readUshort(data,offset),offset+=2,obj.usFirstCharIndex=bin.readUshort(data,offset),offset+=2,obj.usLastCharIndex=bin.readUshort(data,offset),offset+=2,obj.sTypoAscender=bin.readShort(data,offset),offset+=2,obj.sTypoDescender=bin.readShort(data,offset),offset+=2,obj.sTypoLineGap=bin.readShort(data,offset),offset+=2,obj.usWinAscent=bin.readUshort(data,offset),offset+=2,obj.usWinDescent=bin.readUshort(data,offset),offset+=2,offset},version1:function(data,offset,obj){var bin=Typr.B;return offset=Typr.T.OS2.version0(data,offset,obj),obj.ulCodePageRange1=bin.readUint(data,offset),offset+=4,obj.ulCodePageRange2=bin.readUint(data,offset),offset+=4,offset},version2:function(data,offset,obj){var bin=Typr.B,rU=bin.readUshort;return offset=Typr.T.OS2.version1(data,offset,obj),obj.sxHeight=bin.readShort(data,offset),offset+=2,obj.sCapHeight=bin.readShort(data,offset),offset+=2,obj.usDefault=rU(data,offset),offset+=2,obj.usBreak=rU(data,offset),offset+=2,obj.usMaxContext=rU(data,offset),offset+=2,offset},version5:function(data,offset,obj){var rU=Typr.B.readUshort;return offset=Typr.T.OS2.version2(data,offset,obj),obj.usLowerOpticalPointSize=rU(data,offset),offset+=2,obj.usUpperOpticalPointSize=rU(data,offset),offset+=2,offset}},Typr.T.post={parseTab:function(data,offset,length){var bin=Typr.B,obj={};return obj.version=bin.readFixed(data,offset),offset+=4,obj.italicAngle=bin.readFixed(data,offset),offset+=4,obj.underlinePosition=bin.readShort(data,offset),offset+=2,obj.underlineThickness=bin.readShort(data,offset),offset+=2,obj}},Typr.T.SVG={parseTab:function(data,offset,length){var bin=Typr.B,obj={entries:[]},offset0=offset,tableVersion=bin.readUshort(data,offset);offset+=2;var svgDocIndexOffset=bin.readUint(data,offset);offset+=4;var reserved=bin.readUint(data,offset);offset+=4,offset=svgDocIndexOffset+offset0;var numEntries=bin.readUshort(data,offset);offset+=2;for(var i=0;i<numEntries;i++){var startGlyphID=bin.readUshort(data,offset);offset+=2;var endGlyphID=bin.readUshort(data,offset);offset+=2;var svgDocOffset=bin.readUint(data,offset);offset+=4;var svgDocLength=bin.readUint(data,offset);offset+=4;for(var sbuf=new Uint8Array(data.buffer,offset0+svgDocOffset+svgDocIndexOffset,svgDocLength),svg=bin.readUTF8(sbuf,0,sbuf.length),f=startGlyphID;f<=endGlyphID;f++)obj.entries[f]=svg}return obj}};
/* --- 上游代码结束 --- */
/*! ---------------------------------------------------------------------------
 * vendor/31-typr-u.js — Typr.U.js f4fcdeb (MIT)
 * 上游: https://raw.githubusercontent.com/photopea/Typr.js/f4fcdeb8014edc75ab7296bd85ac9cde8cb30489/src/Typr.U.js
 * 上游 sha256: 36f0c3bfd9c11ae6d2336e02e65f10442d6dec134431e9d980f5db508fc96b86
 *
 * 本文件由 scripts/vendor-deps.js 生成并入库，构建期会校验其 sha256。
 * 本地化的原因：脚本猫审核禁止动态代码下发，脚本不应依赖任何外部代码源；
 * 同时消除 jsDelivr 不可达导致核心功能静默失效的风险。
 * ------------------------------------------------------------------------- */
/* --- 上游代码开始 --- */
Typr.U={shape:function(font,str,ltr){for(var getGlyphPosition=function(font2,gls2,i1,ltr2){var g1=gls2[i1],g2=gls2[i1+1],kern=font2.kern;if(kern){var ind1=kern.glyph1.indexOf(g1);if(ind1!=-1){var ind2=kern.rval[ind1].glyph2.indexOf(g2);if(ind2!=-1)return[0,0,kern.rval[ind1].vals[ind2],0]}}return[0,0,0,0]},gls=[],i=0;i<str.length;i++){var cc=str.codePointAt(i);cc>65535&&i++,gls.push(Typr.U.codeToGlyph(font,cc))}for(var shape=[],x=0,y=0,i=0;i<gls.length;i++){var padj=getGlyphPosition(font,gls,i,ltr),gid=gls[i],ax=font.hmtx.aWidth[gid]+padj[2];shape.push({g:gid,cl:i,dx:0,dy:0,ax,ay:0}),x+=ax}return shape},shapeToPath:function(font,shape,clr){for(var tpath={cmds:[],crds:[]},x=0,y=0,i=0;i<shape.length;i++){for(var it=shape[i],path=Typr.U.glyphToPath(font,it.g),crds=path.crds,j=0;j<crds.length;j+=2)tpath.crds.push(crds[j]+x+it.dx),tpath.crds.push(crds[j+1]+y+it.dy);clr&&tpath.cmds.push(clr);for(var j=0;j<path.cmds.length;j++)tpath.cmds.push(path.cmds[j]);var clen=tpath.cmds.length;clr&&clen!=0&&tpath.cmds[clen-1]!="X"&&tpath.cmds.push("X"),x+=it.ax,y+=it.ay}return{cmds:tpath.cmds,crds:tpath.crds}},codeToGlyph:function(font,code){for(var cmap=font.cmap,tind=-1,pps=["p3e10","p0e4","p3e1","p1e0","p0e3","p0e1"],i=0;i<pps.length;i++)if(cmap.ids[pps[i]]!=null){tind=cmap.ids[pps[i]];break}if(tind==-1)throw"no familiar platform and encoding!";var arrSearch=function(arr2,k,v){for(var l=0,r=Math.floor(arr2.length/k);l+1!=r;){var mid=l+(r-l>>>1);arr2[mid*k]<=v?l=mid:r=mid}return l*k},tab=cmap.tables[tind],fmt=tab.format,gid=-1;if(fmt==0)code>=tab.map.length?gid=0:gid=tab.map[code];else if(fmt==4){var sind=-1,ec=tab.endCount;if(code>ec[ec.length-1]?sind=-1:(sind=arrSearch(ec,1,code),ec[sind]<code&&sind++),sind==-1)gid=0;else if(code<tab.startCount[sind])gid=0;else{var gli=0;tab.idRangeOffset[sind]!=0?gli=tab.glyphIdArray[code-tab.startCount[sind]+(tab.idRangeOffset[sind]>>1)-(tab.idRangeOffset.length-sind)]:gli=code+tab.idDelta[sind],gid=gli&65535}}else if(fmt==6){var off=code-tab.firstCode,arr=tab.glyphIdArray;off<0||off>=arr.length?gid=0:gid=arr[off]}else if(fmt==12){var grp=tab.groups;if(code>grp[grp.length-2])gid=0;else{var i=arrSearch(grp,3,code);grp[i]<=code&&code<=grp[i+1]&&(gid=grp[i+2]+(code-grp[i])),gid==-1&&(gid=0)}}else throw"unknown cmap table format "+tab.format;var SVG=font["SVG "],loca=font.loca;return gid!=0&&font["CFF "]==null&&(SVG==null||SVG.entries[gid]==null)&&loca[gid]==loca[gid+1]&&[9,10,11,12,13,32,133,160,5760,8232,8233,8239,12288,6158,8203,8204,8205,8288,65279].indexOf(code)==-1&&!(8192<=code&&code<=8202)&&(gid=0),gid},glyphToPath:function(font,gid){var path={cmds:[],crds:[]},SVG=font["SVG "],CFF=font["CFF "],U=Typr.U;if(SVG&&SVG.entries[gid]){var p=SVG.entries[gid];p!=null&&(typeof p=="string"&&(p=U.SVG.toPath(p),SVG.entries[gid]=p),path=p)}else if(CFF){var pdct=CFF.Private,state={x:0,y:0,stack:[],nStems:0,haveWidth:!1,width:pdct?pdct.defaultWidthX:0,open:!1};if(CFF.ROS){for(var gi=0;CFF.FDSelect[gi+2]<=gid;)gi+=2;pdct=CFF.FDArray[CFF.FDSelect[gi+1]].Private}U._drawCFF(CFF.CharStrings[gid],state,CFF,pdct,path)}else font.glyf&&U._drawGlyf(gid,font,path);return{cmds:path.cmds,crds:path.crds}},_drawGlyf:function(gid,font,path){var gl=font.glyf[gid];gl==null&&(gl=font.glyf[gid]=Typr.T.glyf._parseGlyf(font,gid)),gl!=null&&(gl.noc>-1?Typr.U._simpleGlyph(gl,path):Typr.U._compoGlyph(gl,font,path))},_simpleGlyph:function(gl,p){for(var P=Typr.U.P,c=0;c<gl.noc;c++){for(var i0=c==0?0:gl.endPts[c-1]+1,il=gl.endPts[c],i=i0;i<=il;i++){var pr=i==i0?il:i-1,nx=i==il?i0:i+1,onCurve=gl.flags[i]&1,prOnCurve=gl.flags[pr]&1,nxOnCurve=gl.flags[nx]&1,x=gl.xs[i],y=gl.ys[i];if(i==i0)if(onCurve)if(prOnCurve)P.MoveTo(p,gl.xs[pr],gl.ys[pr]);else{P.MoveTo(p,x,y);continue}else prOnCurve?P.MoveTo(p,gl.xs[pr],gl.ys[pr]):P.MoveTo(p,Math.floor((gl.xs[pr]+x)*.5),Math.floor((gl.ys[pr]+y)*.5));onCurve?prOnCurve&&P.LineTo(p,x,y):nxOnCurve?P.qCurveTo(p,x,y,gl.xs[nx],gl.ys[nx]):P.qCurveTo(p,x,y,Math.floor((x+gl.xs[nx])*.5),Math.floor((y+gl.ys[nx])*.5))}P.ClosePath(p)}},_compoGlyph:function(gl,font,p){for(var j=0;j<gl.parts.length;j++){var path={cmds:[],crds:[]},prt=gl.parts[j];Typr.U._drawGlyf(prt.glyphIndex,font,path);for(var m=prt.m,i=0;i<path.crds.length;i+=2){var x=path.crds[i],y=path.crds[i+1];p.crds.push(x*m.a+y*m.b+m.tx),p.crds.push(x*m.c+y*m.d+m.ty)}for(var i=0;i<path.cmds.length;i++)p.cmds.push(path.cmds[i])}},pathToSVG:function(path,prec){var cmds=path.cmds,crds=path.crds;prec==null&&(prec=5);for(var out=[],co=0,lmap={M:2,L:2,Q:4,C:6},i=0;i<cmds.length;i++){var cmd=cmds[i],cn=co+(lmap[cmd]?lmap[cmd]:0);for(out.push(cmd);co<cn;){var c=crds[co++];out.push(parseFloat(c.toFixed(prec))+(co==cn?"":" "))}}return out.join("")},SVGToPath:function(d){var pth={cmds:[],crds:[]};return Typr.U.SVG.svgToPath(d,pth),{cmds:pth.cmds,crds:pth.crds}},pathToContext:function(path,ctx){for(var c=0,cmds=path.cmds,crds=path.crds,j=0;j<cmds.length;j++){var cmd=cmds[j];cmd=="M"?(ctx.moveTo(crds[c],crds[c+1]),c+=2):cmd=="L"?(ctx.lineTo(crds[c],crds[c+1]),c+=2):cmd=="C"?(ctx.bezierCurveTo(crds[c],crds[c+1],crds[c+2],crds[c+3],crds[c+4],crds[c+5]),c+=6):cmd=="Q"?(ctx.quadraticCurveTo(crds[c],crds[c+1],crds[c+2],crds[c+3]),c+=4):cmd.charAt(0)=="#"?(ctx.beginPath(),ctx.fillStyle=cmd):cmd=="Z"?ctx.closePath():cmd=="X"&&ctx.fill()}},P:{MoveTo:function(p,x,y){p.cmds.push("M"),p.crds.push(x,y)},LineTo:function(p,x,y){p.cmds.push("L"),p.crds.push(x,y)},CurveTo:function(p,a,b,c,d,e,f){p.cmds.push("C"),p.crds.push(a,b,c,d,e,f)},qCurveTo:function(p,a,b,c,d){p.cmds.push("Q"),p.crds.push(a,b,c,d)},ClosePath:function(p){p.cmds.push("Z")}},_drawCFF:function(cmds,state,font,pdct,p){for(var stack=state.stack,nStems=state.nStems,haveWidth=state.haveWidth,width=state.width,open=state.open,i=0,x=state.x,y=state.y,c1x=0,c1y=0,c2x=0,c2y=0,c3x=0,c3y=0,c4x=0,c4y=0,jpx=0,jpy=0,CFF=Typr.T.CFF,P=Typr.U.P,nominalWidthX=pdct.nominalWidthX,o={val:0,size:0};i<cmds.length;){CFF.getCharString(cmds,i,o);var v=o.val;if(i+=o.size,v=="o1"||v=="o18"){var hasWidthArg;hasWidthArg=stack.length%2!==0,hasWidthArg&&!haveWidth&&(width=stack.shift()+nominalWidthX),nStems+=stack.length>>1,stack.length=0,haveWidth=!0}else if(v=="o3"||v=="o23"){var hasWidthArg;hasWidthArg=stack.length%2!==0,hasWidthArg&&!haveWidth&&(width=stack.shift()+nominalWidthX),nStems+=stack.length>>1,stack.length=0,haveWidth=!0}else if(v=="o4")stack.length>1&&!haveWidth&&(width=stack.shift()+nominalWidthX,haveWidth=!0),open&&P.ClosePath(p),y+=stack.pop(),P.MoveTo(p,x,y),open=!0;else if(v=="o5")for(;stack.length>0;)x+=stack.shift(),y+=stack.shift(),P.LineTo(p,x,y);else if(v=="o6"||v=="o7")for(var count=stack.length,isX=v=="o6",j=0;j<count;j++){var sval=stack.shift();isX?x+=sval:y+=sval,isX=!isX,P.LineTo(p,x,y)}else if(v=="o8"||v=="o24"){for(var count=stack.length,index=0;index+6<=count;)c1x=x+stack.shift(),c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),x=c2x+stack.shift(),y=c2y+stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,x,y),index+=6;v=="o24"&&(x+=stack.shift(),y+=stack.shift(),P.LineTo(p,x,y))}else{if(v=="o11")break;if(v=="o1234"||v=="o1235"||v=="o1236"||v=="o1237")v=="o1234"&&(c1x=x+stack.shift(),c1y=y,c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),jpx=c2x+stack.shift(),jpy=c2y,c3x=jpx+stack.shift(),c3y=c2y,c4x=c3x+stack.shift(),c4y=y,x=c4x+stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,jpx,jpy),P.CurveTo(p,c3x,c3y,c4x,c4y,x,y)),v=="o1235"&&(c1x=x+stack.shift(),c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),jpx=c2x+stack.shift(),jpy=c2y+stack.shift(),c3x=jpx+stack.shift(),c3y=jpy+stack.shift(),c4x=c3x+stack.shift(),c4y=c3y+stack.shift(),x=c4x+stack.shift(),y=c4y+stack.shift(),stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,jpx,jpy),P.CurveTo(p,c3x,c3y,c4x,c4y,x,y)),v=="o1236"&&(c1x=x+stack.shift(),c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),jpx=c2x+stack.shift(),jpy=c2y,c3x=jpx+stack.shift(),c3y=c2y,c4x=c3x+stack.shift(),c4y=c3y+stack.shift(),x=c4x+stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,jpx,jpy),P.CurveTo(p,c3x,c3y,c4x,c4y,x,y)),v=="o1237"&&(c1x=x+stack.shift(),c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),jpx=c2x+stack.shift(),jpy=c2y+stack.shift(),c3x=jpx+stack.shift(),c3y=jpy+stack.shift(),c4x=c3x+stack.shift(),c4y=c3y+stack.shift(),Math.abs(c4x-x)>Math.abs(c4y-y)?x=c4x+stack.shift():y=c4y+stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,jpx,jpy),P.CurveTo(p,c3x,c3y,c4x,c4y,x,y));else if(v=="o14"){if(stack.length>0&&!haveWidth&&(width=stack.shift()+font.nominalWidthX,haveWidth=!0),stack.length==4){var asb=0,adx=stack.shift(),ady=stack.shift(),bchar=stack.shift(),achar=stack.shift(),bind=CFF.glyphBySE(font,bchar),aind=CFF.glyphBySE(font,achar);Typr.U._drawCFF(font.CharStrings[bind],state,font,pdct,p),state.x=adx,state.y=ady,Typr.U._drawCFF(font.CharStrings[aind],state,font,pdct,p)}open&&(P.ClosePath(p),open=!1)}else if(v=="o19"||v=="o20"){var hasWidthArg;hasWidthArg=stack.length%2!==0,hasWidthArg&&!haveWidth&&(width=stack.shift()+nominalWidthX),nStems+=stack.length>>1,stack.length=0,haveWidth=!0,i+=nStems+7>>3}else if(v=="o21")stack.length>2&&!haveWidth&&(width=stack.shift()+nominalWidthX,haveWidth=!0),y+=stack.pop(),x+=stack.pop(),open&&P.ClosePath(p),P.MoveTo(p,x,y),open=!0;else if(v=="o22")stack.length>1&&!haveWidth&&(width=stack.shift()+nominalWidthX,haveWidth=!0),x+=stack.pop(),open&&P.ClosePath(p),P.MoveTo(p,x,y),open=!0;else if(v=="o25"){for(;stack.length>6;)x+=stack.shift(),y+=stack.shift(),P.LineTo(p,x,y);c1x=x+stack.shift(),c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),x=c2x+stack.shift(),y=c2y+stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,x,y)}else if(v=="o26")for(stack.length%2&&(x+=stack.shift());stack.length>0;)c1x=x,c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),x=c2x,y=c2y+stack.shift(),P.CurveTo(p,c1x,c1y,c2x,c2y,x,y);else if(v=="o27")for(stack.length%2&&(y+=stack.shift());stack.length>0;)c1x=x+stack.shift(),c1y=y,c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),x=c2x+stack.shift(),y=c2y,P.CurveTo(p,c1x,c1y,c2x,c2y,x,y);else if(v=="o10"||v=="o29"){var obj=v=="o10"?pdct:font;if(stack.length==0)console.log("error: empty stack");else{var ind=stack.pop(),subr=obj.Subrs[ind+obj.Bias];state.x=x,state.y=y,state.nStems=nStems,state.haveWidth=haveWidth,state.width=width,state.open=open,Typr.U._drawCFF(subr,state,font,pdct,p),x=state.x,y=state.y,nStems=state.nStems,haveWidth=state.haveWidth,width=state.width,open=state.open}}else if(v=="o30"||v=="o31"){var count,count1=stack.length,index=0,alternate=v=="o31";for(count=count1&-3,index+=count1-count;index<count;)alternate?(c1x=x+stack.shift(),c1y=y,c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),y=c2y+stack.shift(),count-index==5?(x=c2x+stack.shift(),index++):x=c2x,alternate=!1):(c1x=x,c1y=y+stack.shift(),c2x=c1x+stack.shift(),c2y=c1y+stack.shift(),x=c2x+stack.shift(),count-index==5?(y=c2y+stack.shift(),index++):y=c2y,alternate=!0),P.CurveTo(p,c1x,c1y,c2x,c2y,x,y),index+=4}else{if((v+"").charAt(0)=="o")throw console.log("Unknown operation: "+v,cmds),v;stack.push(v)}}}state.x=x,state.y=y,state.nStems=nStems,state.haveWidth=haveWidth,state.width=width,state.open=open},SVG:(function(){var M={getScale:function(m){return Math.sqrt(Math.abs(m[0]*m[3]-m[1]*m[2]))},translate:function(m,x,y){M.concat(m,[1,0,0,1,x,y])},rotate:function(m,a){M.concat(m,[Math.cos(a),-Math.sin(a),Math.sin(a),Math.cos(a),0,0])},scale:function(m,x,y){M.concat(m,[x,0,0,y,0,0])},concat:function(m,w){var a=m[0],b=m[1],c=m[2],d=m[3],tx=m[4],ty=m[5];m[0]=a*w[0]+b*w[2],m[1]=a*w[1]+b*w[3],m[2]=c*w[0]+d*w[2],m[3]=c*w[1]+d*w[3],m[4]=tx*w[0]+ty*w[2]+w[4],m[5]=tx*w[1]+ty*w[3]+w[5]},invert:function(m){var a=m[0],b=m[1],c=m[2],d=m[3],tx=m[4],ty=m[5],adbc=a*d-b*c;m[0]=d/adbc,m[1]=-b/adbc,m[2]=-c/adbc,m[3]=a/adbc,m[4]=(c*ty-d*tx)/adbc,m[5]=(b*tx-a*ty)/adbc},multPoint:function(m,p){var x=p[0],y=p[1];return[x*m[0]+y*m[2]+m[4],x*m[1]+y*m[3]+m[5]]},multArray:function(m,a){for(var i=0;i<a.length;i+=2){var x=a[i],y=a[i+1];a[i]=x*m[0]+y*m[2]+m[4],a[i+1]=x*m[1]+y*m[3]+m[5]}}};function _bracketSplit(str,lbr,rbr){for(var out=[],pos=0,ci=0,lvl=0;;){var li=str.indexOf(lbr,ci),ri=str.indexOf(rbr,ci);if(li==-1&&ri==-1)break;ri==-1||li!=-1&&li<ri?(lvl==0&&(out.push(str.slice(pos,li).trim()),pos=li+1),lvl++,ci=li+1):(li==-1||ri!=-1&&ri<li)&&(lvl--,lvl==0&&(out.push(str.slice(pos,ri).trim()),pos=ri+1),ci=ri+1)}return out}function cssMap(str){for(var pts=_bracketSplit(str,"{","}"),css={},i=0;i<pts.length;i+=2)for(var cn=pts[i].split(","),j=0;j<cn.length;j++){var cnj=cn[j].trim();css[cnj]==null&&(css[cnj]=""),css[cnj]+=pts[i+1]}return css}function readTrnf(trna){for(var pts=_bracketSplit(trna,"(",")"),m=[1,0,0,1,0,0],i=0;i<pts.length;i+=2){var om=m;m=_readTrnsAttr(pts[i],pts[i+1]),M.concat(m,om)}return m}function _readTrnsAttr(fnc,vls){for(var m=[1,0,0,1,0,0],gotSep=!0,i=0;i<vls.length;i++){var ch=vls.charAt(i);ch==","||ch==" "?gotSep=!0:ch=="."?(gotSep||(vls=vls.slice(0,i)+","+vls.slice(i),i++),gotSep=!1):ch=="-"&&i>0&&vls[i-1]!="e"&&(vls=vls.slice(0,i)+" "+vls.slice(i),i++,gotSep=!0)}if(vls=vls.split(/\s*[\s,]\s*/).map(parseFloat),fnc=="translate")vls.length==1?M.translate(m,vls[0],0):M.translate(m,vls[0],vls[1]);else if(fnc=="scale")vls.length==1?M.scale(m,vls[0],vls[0]):M.scale(m,vls[0],vls[1]);else if(fnc=="rotate"){var tx=0,ty=0;vls.length!=1&&(tx=vls[1],ty=vls[2]),M.translate(m,-tx,-ty),M.rotate(m,-Math.PI*vls[0]/180),M.translate(m,tx,ty)}else fnc=="matrix"?m=vls:console.log("unknown transform: ",fnc);return m}function toPath(str){var pth={cmds:[],crds:[]};if(str==null)return pth;var prsr=new DOMParser,doc=prsr.parseFromString(str,"image/svg+xml"),svg=doc.getElementsByTagName("svg")[0],vb=svg.getAttribute("viewBox");vb?vb=vb.trim().split(" ").map(parseFloat):vb=[0,0,1e3,1e3],_toPath(svg.children,pth);for(var i=0;i<pth.crds.length;i+=2){var x=pth.crds[i],y=pth.crds[i+1];x-=vb[0],y-=vb[1],y=-y,pth.crds[i]=x,pth.crds[i+1]=y}return pth}function _toPath(nds,pth,fill){for(var ni=0;ni<nds.length;ni++){var nd=nds[ni],tn=nd.tagName,cfl=nd.getAttribute("fill");if(cfl==null&&(cfl=fill),tn=="g"){var tp={crds:[],cmds:[]};_toPath(nd.children,tp,cfl);var trf=nd.getAttribute("transform");if(trf){var m=readTrnf(trf);M.multArray(m,tp.crds)}pth.crds=pth.crds.concat(tp.crds),pth.cmds=pth.cmds.concat(tp.cmds)}else if(tn=="path"||tn=="circle"||tn=="ellipse"){pth.cmds.push(cfl||"#000000");var d;if(tn=="path"&&(d=nd.getAttribute("d")),tn=="circle"||tn=="ellipse"){for(var vls=[0,0,0,0],nms=["cx","cy","rx","ry","r"],i=0;i<5;i++){var V=nd.getAttribute(nms[i]);V&&(V=parseFloat(V),i<4?vls[i]=V:vls[2]=vls[3]=V)}var cx=vls[0],cy=vls[1],rx=vls[2],ry=vls[3];d=["M",cx-rx,cy,"a",rx,ry,0,1,0,rx*2,0,"a",rx,ry,0,1,0,-rx*2,0].join(" ")}svgToPath(d,pth),pth.cmds.push("X")}else tn=="defs"||console.log(tn,nd)}}function _tokens(d){for(var ts=[],off=0,rn=!1,cn="",pc="";off<d.length;){var cc=d.charCodeAt(off),ch=d.charAt(off);off++;var isNum=48<=cc&&cc<=57||ch=="."||ch=="-"||ch=="e"||ch=="E";rn?ch=="-"&&pc!="e"||ch=="."&&cn.indexOf(".")!=-1?(ts.push(parseFloat(cn)),cn=ch):isNum?cn+=ch:(ts.push(parseFloat(cn)),ch!=","&&ch!=" "&&ts.push(ch),rn=!1):isNum?(cn=ch,rn=!0):ch!=","&&ch!=" "&&ts.push(ch),pc=ch}return rn&&ts.push(parseFloat(cn)),ts}function _reps(ts,off,ps){for(var i=off;i<ts.length&&typeof ts[i]!="string";)i+=ps;return(i-off)/ps}function svgToPath(d,pth){for(var ts=_tokens(d),i=0,x=0,y=0,ox=0,oy=0,oldo=pth.crds.length,pc={M:2,L:2,H:1,V:1,T:2,S:4,A:7,Q:4,C:6},cmds=pth.cmds,crds=pth.crds;i<ts.length;){var cmd=ts[i];i++;var cmu=cmd.toUpperCase();if(cmu=="Z")cmds.push("Z"),x=ox,y=oy;else for(var ps=pc[cmu],reps=_reps(ts,i,ps),j=0;j<reps;j++){j==1&&cmu=="M"&&(cmd=cmd==cmu?"L":"l",cmu="L");var xi=0,yi=0;if(cmd!=cmu&&(xi=x,yi=y),cmu=="M")x=xi+ts[i++],y=yi+ts[i++],cmds.push("M"),crds.push(x,y),ox=x,oy=y;else if(cmu=="L")x=xi+ts[i++],y=yi+ts[i++],cmds.push("L"),crds.push(x,y);else if(cmu=="H")x=xi+ts[i++],cmds.push("L"),crds.push(x,y);else if(cmu=="V")y=yi+ts[i++],cmds.push("L"),crds.push(x,y);else if(cmu=="Q"){var x1=xi+ts[i++],y1=yi+ts[i++],x2=xi+ts[i++],y2=yi+ts[i++];cmds.push("Q"),crds.push(x1,y1,x2,y2),x=x2,y=y2}else if(cmu=="T"){var co=Math.max(crds.length-2,oldo),x1=x+x-crds[co],y1=y+y-crds[co+1],x2=xi+ts[i++],y2=yi+ts[i++];cmds.push("Q"),crds.push(x1,y1,x2,y2),x=x2,y=y2}else if(cmu=="C"){var x1=xi+ts[i++],y1=yi+ts[i++],x2=xi+ts[i++],y2=yi+ts[i++],x3=xi+ts[i++],y3=yi+ts[i++];cmds.push("C"),crds.push(x1,y1,x2,y2,x3,y3),x=x3,y=y3}else if(cmu=="S"){var co=Math.max(crds.length-(cmds[cmds.length-1]=="C"?4:2),oldo),x1=x+x-crds[co],y1=y+y-crds[co+1],x2=xi+ts[i++],y2=yi+ts[i++],x3=xi+ts[i++],y3=yi+ts[i++];cmds.push("C"),crds.push(x1,y1,x2,y2,x3,y3),x=x3,y=y3}else if(cmu=="A"){var x1=x,y1=y,rx=ts[i++],ry=ts[i++],phi=ts[i++]*(Math.PI/180),fA=ts[i++],fS=ts[i++],x2=xi+ts[i++],y2=yi+ts[i++];if(x2==x&&y2==y&&rx==0&&ry==0)continue;var hdx=(x1-x2)/2,hdy=(y1-y2)/2,cosP=Math.cos(phi),sinP=Math.sin(phi),x1A=cosP*hdx+sinP*hdy,y1A=-sinP*hdx+cosP*hdy,rxS=rx*rx,ryS=ry*ry,x1AS=x1A*x1A,y1AS=y1A*y1A,frc=(rxS*ryS-rxS*y1AS-ryS*x1AS)/(rxS*y1AS+ryS*x1AS),coef=(fA!=fS?1:-1)*Math.sqrt(Math.max(frc,0)),cxA=coef*(rx*y1A)/ry,cyA=-coef*(ry*x1A)/rx,cx=cosP*cxA-sinP*cyA+(x1+x2)/2,cy=sinP*cxA+cosP*cyA+(y1+y2)/2,angl=function(ux,uy,vx,vy){var lU=Math.sqrt(ux*ux+uy*uy),lV=Math.sqrt(vx*vx+vy*vy),num=(ux*vx+uy*vy)/(lU*lV);return(ux*vy-uy*vx>=0?1:-1)*Math.acos(Math.max(-1,Math.min(1,num)))},vX=(x1A-cxA)/rx,vY=(y1A-cyA)/ry,theta1=angl(1,0,vX,vY),dtheta=angl(vX,vY,(-x1A-cxA)/rx,(-y1A-cyA)/ry);dtheta=dtheta%(2*Math.PI);var arc=function(gst2,x4,y4,r,a0,a1,neg){var rotate=function(m,a){var si=Math.sin(a),co2=Math.cos(a),a=m[0],b=m[1],c=m[2],d2=m[3];m[0]=a*co2+b*si,m[1]=-a*si+b*co2,m[2]=c*co2+d2*si,m[3]=-c*si+d2*co2},multArr=function(m,a){for(var j3=0;j3<a.length;j3+=2){var x5=a[j3],y5=a[j3+1];a[j3]=m[0]*x5+m[2]*y5+m[4],a[j3+1]=m[1]*x5+m[3]*y5+m[5]}},concatA=function(a,b){for(var j3=0;j3<b.length;j3++)a.push(b[j3])},concatP=function(p,r2){concatA(p.cmds,r2.cmds),concatA(p.crds,r2.crds)};if(neg)for(;a1>a0;)a1-=2*Math.PI;else for(;a1<a0;)a1+=2*Math.PI;var th=(a1-a0)/4,x0=Math.cos(th/2),y0=-Math.sin(th/2),x12=(4-x0)/3,y12=y0==0?y0:(1-x0)*(3-x0)/(3*y0),x22=x12,y22=-y12,x32=x0,y32=-y0,ps2=[x12,y12,x22,y22,x32,y32],pth2={cmds:["C","C","C","C"],crds:ps2.slice(0)},rot=[1,0,0,1,0,0];rotate(rot,-th);for(var j2=0;j2<3;j2++)multArr(rot,ps2),concatA(pth2.crds,ps2);rotate(rot,-a0+th/2),rot[0]*=r,rot[1]*=r,rot[2]*=r,rot[3]*=r,rot[4]=x4,rot[5]=y4,multArr(rot,pth2.crds),multArr(gst2.ctm,pth2.crds),concatP(gst2.pth,pth2)},gst={pth,ctm:[rx*cosP,rx*sinP,-ry*sinP,ry*cosP,cx,cy]};arc(gst,0,0,1,theta1,theta1+dtheta,fS==0),x=x2,y=y2}else console.log("Unknown SVG command "+cmd)}}}return{cssMap,readTrnf,svgToPath,toPath}})(),initHB:function(hurl,resp){var codeLength=function(code){var len=0;return(code&4294967168)==0?len=1:(code&4294965248)==0?len=2:(code&4294901760)==0?len=3:(code&4292870144)==0&&(len=4),len},te=new window.TextEncoder("utf8");fetch(hurl).then(function(x){return x.arrayBuffer()}).then(function(ab){return WebAssembly.instantiate(ab)}).then(function(res){console.log("HB ready");var exp=res.instance.exports,mem=exp.memory;mem.grow(700);var heapu8=new Uint8Array(mem.buffer),u32=new Uint32Array(mem.buffer),i32=new Int32Array(mem.buffer),__lastFnt,blob,blobPtr,face,font;Typr.U.shapeHB=(function(){var toJson=function(ptr){for(var length=exp.hb_buffer_get_length(ptr),result=[],iPtr32=exp.hb_buffer_get_glyph_infos(ptr,0)>>>2,pPtr32=exp.hb_buffer_get_glyph_positions(ptr,0)>>>2,i=0;i<length;++i){var a=iPtr32+i*5,b=pPtr32+i*5;result.push({g:u32[a+0],cl:u32[a+2],ax:i32[b+0],ay:i32[b+1],dx:i32[b+2],dy:i32[b+3]})}return result};return function(fnt,str,ltr){var fdata=fnt._data,fn=fnt.name.postScriptName;__lastFnt!=fn&&(blob!=null&&(exp.hb_blob_destroy(blob),exp.free(blobPtr),exp.hb_face_destroy(face),exp.hb_font_destroy(font)),blobPtr=exp.malloc(fdata.byteLength),heapu8.set(fdata,blobPtr),blob=exp.hb_blob_create(blobPtr,fdata.byteLength,2,0,0),face=exp.hb_face_create(blob,0),font=exp.hb_font_create(face),__lastFnt=fn);var buffer=exp.hb_buffer_create(),bytes=te.encode(str),len=bytes.length,strp=exp.malloc(len);heapu8.set(bytes,strp),exp.hb_buffer_add_utf8(buffer,strp,len,0,len),exp.free(strp),exp.hb_buffer_set_direction(buffer,ltr?4:5),exp.hb_buffer_guess_segment_properties(buffer),exp.hb_shape(font,buffer,0,0);var json=toJson(buffer);exp.hb_buffer_destroy(buffer);var arr=json.slice(0);ltr||arr.reverse();for(var ci=0,bi=0,i=1;i<arr.length;i++){for(var gl=arr[i],cl=gl.cl;;){var cpt=str.codePointAt(ci),cln=codeLength(cpt);if(bi+cln<=cl)bi+=cln,ci+=cpt<=65535?1:2;else break}gl.cl=ci}return json}})(),resp()})}};
/* --- 上游代码结束 --- */
/*********************************自定义配置区******************************************************** */
var setting = {
    showBox: 1,     // 显示脚本浮窗，0为关闭，1为开启，不建议关闭

    // 云端服务与充值中心配置
    serverUrl: 'https://xuexitong.icollege.top',     // 云端答题与认证服务地址
    rechargeUrl: 'https://xuexitong.icollege.top/index.html', // 充值中心地址

    task: 0,        // 只处理任务点任务，0为关闭，1为开启

    video: 1,       // 处理视频，0为关闭，1为开启
    audio: 1,       // 处理音频，0为关闭，1为开启
    rate: 1,        // 视频/音频倍速，默认 1（正常），可在浮窗设置中调整（最高 16）
    review: 0,      // 复习模式，0为关闭，1为开启可以补挂视频时长

    work: 1,        // 测验自动处理，0为关闭，1为开启，开启将会处理测验，关闭会跳过测验
    time: 2500,     // 答题与搜题时间间隔，默认2.5s=2500
    sub: 1,         // 测验自动提交，0为关闭,1为开启，当没答案时测验将不会提交，如需提交请设置force：1
    force: 0,       // 测验强制提交，0为关闭，1为开启，开启此功能将会强制提交测验（无论作答与否）
    decrypt: 1,     // 字体解密，0为关闭，1为开启，推荐开启，方法来自wyn665817大佬
    redo: 0,        // 重做模式，0为关闭，1为开启，开启后不跳过已答题，重新AI作答覆盖旧答案

    humanJitter: 1, // 拟人化正态波动延时，防平台节律风控
    thinkingPause: 1, // 拟人化答题停顿，根据题干字数动态计算阅读与思考时间并模拟微动作
    targetAccuracy: 90, // 期望正确率 (50~100)，默认 90%，低于 100% 时自动智能选错避开全满分风控
    localCache: 1,  // 本地离线题目缓存，重做/复习免消耗 Token
    visionMode: 1,  // 多模态图像识别，自动提取公式/图表送入视觉大模型

    examTurn: 0,     // 考试自动跳转下一题，0为关闭，1为开启
    examTurnTime: 0, // 考试自动跳转下一题随机间隔时间(3-7s)之间，0为关闭，1为开启
    goodStudent: 0,  // 好学生模式,不自动选择答案,仅将单选题和多选题的ABCD加粗
    alterTitle: 0,  // 答案插入题目后(关闭)

    // 说明：这里曾提供 autoLogin / phone / password 三个配置项，用于把学习通
    // 账号密码写进脚本并自动填表登录。该能力已彻底移除，原因是：
    //   1) 凭据会以明文写进脚本源码与 GM 存储 —— 而脚本本身还会自动更新，
    //      等于把密码交给一条会自动替换的链路；
    //   2) 面板从未提供对应输入框，唯一用法是手改源码，误用风险远大于收益。
    // 需要自动登录请使用脚本管理器的会话保持或浏览器自身的密码管理。
}
/************************************************************************************************** */
/*
                  _    _                    _   _              ___  __
     /\          | |  | |                  | \ | |            |__ \/_ |
    /  \   _   _ | |_ | |__    ___   _ __  |  \| |  ___  ______  ) || |
   / /\ \ | | | || __|| '_ \  / _ \ | '__| | . ` | / _ \|______|/ / | |
  / ____ \| |_| || |_ | | | || (_) || |    | |\  ||  __/       / /_ | |
 /_/    \_\\__,_| \__||_| |_| \___/ |_|    |_| \_| \___|      |____||_|

  TG：https://t.me/+REKHQoWVJh45MDg1   Date：20240914

*/
/************************************************************************************************** */

// 注：原来此处还留下一段关于 document.domain 的兼容性说明，对应的赋值语句已从
// 20-preamble.js 中移除（现代浏览器已废弃该赋值，且它会主动削弱同源隔离）。
// 说明：这里曾执行 document.domain = 'chaoxing.com' 以放宽跨子域 iframe 访问。
// 该赋值在现代浏览器（Chromium 115+ 起）已被废弃并忽略，保留它只有坏处：
//   · 一旦浏览器仍支持，它会**主动削弱同源隔离** —— 任一 chaoxing 子域被 XSS
//     都会波及整个 chaoxing.com；
//   · 且它有实际副作用（设置后无法再被改回），属"注定失效但仍承担风险"。
// 跨 frame 访问已由 src/30-logging.js 的 getSafeTopDoc 等带 try 的保护逻辑覆盖。

// 跨 frame 消息总线监听（解决现代跨域 iframe 日志与控制同步）
try {
    window.addEventListener('message', function (e) {
        if (e.data && e.data.type === 'GPTJS_LOGGER') {
            logger(e.data.text, e.data.color);
        }
    }, false);
} catch { /* 忽略 */ }

// =========================================================================
// 解决失去焦点暂停视频与后台检测问题（全主流浏览器内核深度适配）
// 覆盖：Chromium (Chrome / Edge / 360 / QQ / Brave / Opera),
//       Gecko (Firefox / 火狐 Xray Wrappers),
//       WebKit (Safari / Orion)
// =========================================================================
try {
    // 收集所有需要劫持的窗口、文档与原型目标（穿透 Firefox Xray Wrapper 隔离）
    var _allWins = [];
    var _allDocs = [];
    var _allDocProtos = [];

    function _pushUnique(arr, item) {
        if (item && arr.indexOf(item) === -1) arr.push(item);
    }

    _pushUnique(_allWins, window);
    if (typeof unsafeWindow !== 'undefined' && unsafeWindow) {
        _pushUnique(_allWins, unsafeWindow);
        if (unsafeWindow.wrappedJSObject) _pushUnique(_allWins, unsafeWindow.wrappedJSObject);
    }

    _allWins.forEach(function (w) {
        try { if (w.document) _pushUnique(_allDocs, w.document); } catch { /* 忽略 */ }
        try { if (w.Document && w.Document.prototype) _pushUnique(_allDocProtos, w.Document.prototype); } catch { /* 忽略 */ }
    });
    if (typeof document !== 'undefined' && document) _pushUnique(_allDocs, document);
    if (typeof Document !== 'undefined' && Document.prototype) _pushUnique(_allDocProtos, Document.prototype);

    // 1. 废除全套失焦与切屏属性处理函数 (onblur, onvisibilitychange 等)
    var blockedProps = [
        'onblur', 'onfocusout', 'onvisibilitychange', 'onpagehide',
        'onwebkitvisibilitychange', 'onmozvisibilitychange', 'onfreeze'
    ];
    _allWins.concat(_allDocs).forEach(function (target) {
        blockedProps.forEach(function (prop) {
            try {
                Object.defineProperty(target, prop, {
                    get: function () { return function () { }; },
                    set: function () { },
                    configurable: true
                });
            } catch { /* 忽略 */ }
        });
    });

    // 2. 覆盖 document.hasFocus 永远返回 true
    var _alwaysTrueHasFocus = function () { return true; };
    _allDocs.forEach(function (d) {
        try { d.hasFocus = _alwaysTrueHasFocus; } catch { /* 忽略 */ }
    });
    _allDocProtos.forEach(function (dp) {
        try { dp.hasFocus = _alwaysTrueHasFocus; } catch { /* 忽略 */ }
    });

    // 3. 劫持 visibilityState 和 hidden 属性（包含 WebKit / Gecko 原生前缀）
    var _visTargets = _allDocs.concat(_allDocProtos);
    _visTargets.forEach(function (vt) {
        try {
            Object.defineProperty(vt, 'visibilityState', {
                get: function () { return 'visible'; },
                configurable: true
            });
        } catch { /* 忽略 */ }
        try {
            Object.defineProperty(vt, 'hidden', {
                get: function () { return false; },
                configurable: true
            });
        } catch { /* 忽略 */ }
        try {
            Object.defineProperty(vt, 'webkitVisibilityState', {
                get: function () { return 'visible'; },
                configurable: true
            });
            Object.defineProperty(vt, 'webkitHidden', {
                get: function () { return false; },
                configurable: true
            });
        } catch { /* 忽略 */ }
        try {
            Object.defineProperty(vt, 'mozVisibilityState', {
                get: function () { return 'visible'; },
                configurable: true
            });
            Object.defineProperty(vt, 'mozHidden', {
                get: function () { return false; },
                configurable: true
            });
        } catch { /* 忽略 */ }
    });

    // 4. 事件级深度防切屏：精准 Hook Window 与 Document 的 addEventListener
    // 仅拦截针对 Window 的 blur/freeze，以及针对 Document 的 visibilitychange 系列
    // 严格排除普通 Element（保留输入框与控件的正常 focus/blur）和 pagehide（保留生命周期进度上报）
    var blockedWinEvents = { blur: true, freeze: true };
    var blockedDocEvents = { visibilitychange: true, webkitvisibilitychange: true, mozvisibilitychange: true };

    _allWins.forEach(function (w) {
        try {
            var winProto = (w.Window && w.Window.prototype) || w;
            if (!winProto || !winProto.addEventListener || winProto._gptWinAelHooked) return;
            var origWinAel = winProto.addEventListener;
            winProto.addEventListener = function (type, listener, options) {
                if (typeof type === "string" && blockedWinEvents[type.toLowerCase()]) {
                    if (options && options.__internal) return origWinAel.call(this, type, listener, options);
                    if (this === w || this === window || (typeof unsafeWindow !== "undefined" && this === unsafeWindow) || (w.Window && this instanceof w.Window)) {
                        return origWinAel.call(this, type, function () {}, options);
                    }
                }
                return origWinAel.call(this, type, listener, options);
            };
            winProto._gptWinAelHooked = true;
        } catch { /* 忽略 */ }
    });

    _allDocs.concat(_allDocProtos).forEach(function (dTarget) {
        try {
            if (!dTarget || !dTarget.addEventListener || dTarget._gptDocAelHooked) return;
            var origDocAel = dTarget.addEventListener;
            dTarget.addEventListener = function (type, listener, options) {
                if (typeof type === "string" && blockedDocEvents[type.toLowerCase()]) {
                    if (options && options.__internal) return origDocAel.call(this, type, listener, options);
                    return origDocAel.call(this, type, function () {}, options);
                }
                return origDocAel.call(this, type, listener, options);
            };
            dTarget._gptDocAelHooked = true;
        } catch { /* 忽略 */ }
    });
} catch (e) {
    console.error("[GPTJs] 无法劫持 window.onblur / document.hasFocus", e);
}

// 全局弹窗与确认框拦截（防止提交测验/作业时被阻塞式原生 confirm / alert 挂起）
_allWins.forEach(function (win) {
    try {
        var _oldAlert = win.alert;
        win.alert = function (msg) {
            if (typeof msg === 'string' && (msg.includes('保存成功') || msg.includes('提交成功'))) {
                return;
            }
            return _oldAlert ? _oldAlert.apply(this, arguments) : undefined;
        };
        var _oldConfirm = win.confirm;
        win.confirm = function (msg) {
            var str = String(msg || '');
            if (str.includes('确认提交') || str.includes('确定提交') || str.includes('未做完') || str.includes('未完成') || str.includes('交卷') || str.includes('确认要提交') || str.includes('确定要提交')) {
                return true;
            }
            return _oldConfirm ? _oldConfirm.apply(this, arguments) : true;
        };
    } catch { /* 忽略 */ }
});

// 基于 GM_getValue/GM_setValue 实现跨子域名共享的 localStorage 代理（安全且支持域名隔离版）
var localStorage = {
    // 自动提取主域名作为前缀，实现不同学校/平台之间的隔离，同时保证同一学校的子域名间可共享
    _getPrefix: function () {
        try {
            var host = window.location.hostname;
            var matches = host.match(/([^.]+\.(?:com|net|org|edu)\.cn|[^.]+\.[^.]+)$/i);
            return (matches ? matches[0] : host) + ':';
        } catch {
            return '';
        }
    },
    getItem: function (key) {
        var prefixedKey = this._getPrefix() + key;
        var val = undefined;

        // 1. 优先尝试从油猴/脚本猫的全局存储中读取配置
        try {
            val = GM_getValue(prefixedKey);
        } catch {
            // 忽略 GM 错误
        }

        // 2. 如果油猴存储中没有，尝试从原生 localStorage 读取以实现平滑迁移
        if (val === undefined || val === null) {
            try {
                val = window.localStorage.getItem(key);
                if (val !== null) {
                    GM_setValue(prefixedKey, val); // 迁移到油猴中
                }
            } catch {
                // 忽略跨域 iframe 限制抛出的 SecurityError，不影响 GM_getValue 结果
            }
        }
        return (val !== undefined && val !== null) ? val : null;
    },
    setItem: function (key, value) {
        var prefixedKey = this._getPrefix() + key;
        // 1. 写入油猴全局存储
        try {
            GM_setValue(prefixedKey, String(value));
        } catch { /* 忽略 */ }

        // 2. 写入原生存储，若在跨域 iframe 中报错则安全忽略
        try {
            window.localStorage.setItem(key, String(value));
        } catch { /* 忽略 */ }
    },
    removeItem: function (key) {
        var prefixedKey = this._getPrefix() + key;
        try {
            GM_deleteValue(prefixedKey);
        } catch { /* 忽略 */ }
        try {
            window.localStorage.removeItem(key);
        } catch { /* 忽略 */ }
    }
};

// jQuery 解析：优先使用宿主页面自带的 jQuery（与页面共用实例，避免事件/插件割裂），
// 其次顶层窗口（跨域 iframe 下访问 top 会抛 SecurityError，必须保护），
// 最后回退到本地内联的 vendor 副本 —— 保证任何 @match 页面都能正常工作。
function ne21ResolveJQuery() {
    try { if (unsafeWindow && unsafeWindow.jQuery) return unsafeWindow.jQuery; } catch { /* 跨域 */ }
    try { if (window.top && window.top !== window && window.top.jQuery) return window.top.jQuery; } catch { /* 跨域 */ }
    try { if (typeof __ne21VendorJQuery !== 'undefined' && __ne21VendorJQuery) return __ne21VendorJQuery; } catch { /* empty */ }
    try { if (window.jQuery) return window.jQuery; } catch { /* empty */ }
    return null;
}

var _w = unsafeWindow,
    _l = location,
    _d = _w.document,
    $ = ne21ResolveJQuery(),
    UE = _w.UE;
// md5 不需要在这里声明或兜底：vendor/20-md5.js 已经用顶层 `var md5 = (IIFE)()`
// 把它提升为脚本作用域变量，拼接顺序上必然先于本文件执行。
// 旧实现写的是 `md5 = md5 || window.md5`，既构成重复声明（no-redeclare），
// 又是在给一个只读全局赋值（no-global-assign），而且那一行永远走不到。
var _ne21LogColorMap = {
    red: '#dc2626', green: '#059669', blue: '#2563eb',
    yellow: '#ca8a04', orange: '#ea580c', purple: '#7c3aed',
    pink: '#db2777', gray: '#64748b', grey: '#64748b'
}
// HTML 转义：题干、选项、AI 答案、页面任务名等均来自第三方 DOM 或网络响应，
// 直接拼接进 innerHTML 会在学习通页面上下文里形成 XSS。日志一律按纯文本渲染。
function ne21EscapeHtml(v) {
    return String(v == null ? '' : v)
        .replace(/&/g, '&amp;')
        .replace(/</g, '&lt;')
        .replace(/>/g, '&gt;')
        .replace(/"/g, '&quot;')
        .replace(/'/g, '&#39;')
}

// 颜色仅允许映射表内的键或安全的十六进制值，防止跨 frame 消息注入任意 CSS
function ne21SafeColor(color) {
    var c = (_ne21LogColorMap && _ne21LogColorMap[color]) || color || '#334155'
    if (typeof c !== 'string') return '#334155'
    return (/^(?:#[0-9a-f]{3,8}|[a-z]{3,20})$/i.test(c.trim())) ? c.trim() : '#334155'
}

// 极少数由脚本自身构造的可信 HTML 片段（如"思考中"动画）可显式声明免转义
function ne21LogText(str, opts) {
    if (opts && opts.raw) return String(str == null ? '' : str)
    return ne21EscapeHtml(str)
}

function getNe21LogContainer() {
    var $log = $('#ne-21log');
    if ($log.length) return $log;
    try {
        if (window.parent && window.parent.document) {
            var $pLog = $('#ne-21log', window.parent.document);
            if ($pLog.length) return $pLog;
        }
    } catch { /* 忽略 */ }
    try {
        if (window.top && window.top.document) {
            var $tLog = $('#ne-21log', window.top.document);
            if ($tLog.length) return $tLog;
        }
    } catch { /* 忽略 */ }
    return $('#ne-21log');
}

function logger(str, color, opts) {
    try {
        if (window !== window.top && window.top && typeof window.top.logger === 'function') {
            return window.top.logger(str, color, opts);
        }
    } catch { /* 跨域隔离时回退本地 */ }
    var _time = new Date().toLocaleTimeString();
    var c = ne21SafeColor(color);
    var $p = $('<p><span class="ne21-time">[' + _time + ']</span><span class="ne21-msg" style="color:' + c + ';">' + ne21LogText(str, opts) + '</span></p>');
    var $container = getNe21LogContainer();
    if ($container && $container.length) {
        $container.prepend($p);
    }
    return $p;
}
// 原地更新一条已存在的日志(由 logger 返回的 jQuery <p> 元素)。
// 用于把 "AI 思考中..." 占位行原地替换为答案/错误提示, 避免反复出现/消失。
function updateLogEntry($p, str, color, opts) {
    if (!$p || !$p.length) return
    var c = ne21SafeColor(color)
    $p.find('.ne21-msg').css('color', c).html(ne21LogText(str, opts))
}



var _currentQuestionDom = null;

// === 云控微内核策略同步与状态 ===
var _cloudPolicy = {
    version: '4.7.7',
    maxSafeRate: 16,
    jitterBaseMs: 2500,
    forceGoodStudent: false,
    announcement: null,
    promo: null
};

// 记录已检测到的远端更高版本（供浮窗渲染横幅使用）
var _discoveredNewVersion = null;

function getLocalScriptVersion() {
    try {
        if (typeof GM_info !== 'undefined' && GM_info && GM_info.script && GM_info.script.version) {
            return String(GM_info.script.version).trim();
        }
    } catch { /* 忽略 */ }
    return '4.7.7'; // fallback-version
}

function isNewerVersion(remote, local) {
    if (!remote || !local) return false;
    var rParts = String(remote).replace(/^[^\d]*/, '').split('.').map(function (n) { return parseInt(n, 10) || 0; });
    var lParts = String(local).replace(/^[^\d]*/, '').split('.').map(function (n) { return parseInt(n, 10) || 0; });
    var len = Math.max(rParts.length, lParts.length);
    for (var i = 0; i < len; i++) {
        var r = rParts[i] || 0;
        var l = lParts[i] || 0;
        if (r > l) return true;
        if (r < l) return false;
    }
    return false;
}

function renderUpdateBanner(remoteVer) {
    if (!remoteVer) return;
    try {
        var targetDoc = (typeof getSafeTopDoc === 'function') ? getSafeTopDoc() : document;
        var $banner = $('#ne21UpdateBanner', targetDoc);
        if (!$banner || !$banner.length) $banner = $('#ne21UpdateBanner');
        if ($banner && $banner.length) {
            $banner.find('#ne21NewVerText').text(remoteVer);
            $banner.css('display', 'flex');
        }
    } catch { /* 忽略 */ }
}

function fetchCloudPolicy() {
    var sUrl = getSafeServerUrl();
    GM_xmlhttpRequest({
        method: 'GET',
        url: sUrl + '/api/config/policy',
        timeout: 8000,
        onload: function (res) {
            try {
                if (res.status === 200) {
                    var data = JSON.parse(res.responseText);
                    if (data && data.policy) {
                        _cloudPolicy = data.policy;
                        if (_cloudPolicy.forceGoodStudent) {
                            setting.goodStudent = 1;
                            logger('⚠️ [云端安全提示] 当前全网处于考试防风控期，已全局启用【好学生模式】（加粗答案不自动点击）', 'orange');
                        }
                        if (_cloudPolicy.maxSafeRate && setting.rate > _cloudPolicy.maxSafeRate) {
                            setting.rate = _cloudPolicy.maxSafeRate;
                            logger('⚠️ [云端安全提示] 检测到高倍速风控，已将倍速安全限制在 ' + _cloudPolicy.maxSafeRate + '×', 'orange');
                        }
                        // 版本更新感知：对比云端策略版本与本地脚本版本
                        var remoteVer = _cloudPolicy.version;
                        var localVer = getLocalScriptVersion();
                        if (isNewerVersion(remoteVer, localVer)) {
                            _discoveredNewVersion = remoteVer;
                            try {
                                var _lastPromptedUpdateVer = sessionStorage.getItem('GPTJs_PromptedUpdateVer');
                                if (_lastPromptedUpdateVer !== remoteVer) {
                                    sessionStorage.setItem('GPTJs_PromptedUpdateVer', remoteVer);
                                    logger('🚀 [版本更新] 检测到新版本 v' + remoteVer + ' (当前 v' + localVer + ')，建议前往脚本猫更新以获取最新题库与防风控策略！', 'blue');
                                }
                            } catch {
                                logger('🚀 [版本更新] 检测到新版本 v' + remoteVer + ' (当前 v' + localVer + ')，建议前往脚本猫更新以获取最新题库与防风控策略！', 'blue');
                            }
                            renderUpdateBanner(remoteVer);
                        }
                        // 公告随策略一起下发（纯文本数据，经 logger 转义后渲染）。
                        // 历史上这段逻辑挂在 /api/ui/bundle 上，而该接口会下发可写入
                        // <style> 的 CSS，属远端内容注入、不符合脚本商店审核要求，已废弃。
                        var _ann = _cloudPolicy.announcement;
                        if (_ann && _ann.content) {
                            var _lastNoticeId = localStorage.getItem('GPTJs_LastNoticeId');
                            if (_lastNoticeId !== _ann.id) {
                                localStorage.setItem('GPTJs_LastNoticeId', _ann.id);
                                logger('📢 [公告] ' + _ann.content, 'blue');
                            }
                        }
                    }
                }
            } catch { /* 忽略 */ }
        }
    });
}
// 仅在确属学习通/超星系页面时才拉云控策略（详见 c0-network.js 的 shouldContactCloud）。
// 非平台页面上的效果仅是"沿用内置默认策略"，不影响任何答题功能。
if (shouldContactCloud()) fetchCloudPolicy();


var _mlist, _defaults, _domList, $subBtn, $saveBtn, $frame_c, $okBtn, _currentPhoneDom, _currentPhoneForm;
var _currentQuestionMeta = null;
// AI 搜题请求节流：记录下一次可发起请求的时间戳（ms），由 getAnswer 内部维护
var _ne21NextAiAllowedAt = 0;

$('.navshow').find('a:contains(体验新版)')[0] ? $('.navshow').find('a:contains(体验新版)')[0].click() : '';

setting.decrypt ? decryptFont() : '';

// 同步本地缓存的全局设置
if (localStorage.getItem('GPTJsSetting.time') !== null) {
    var _savedTime = parseFloat(localStorage.getItem('GPTJsSetting.time'));
    if (isFinite(_savedTime) && _savedTime >= 0) {
        setting.time = _savedTime * 1000;
    }
}
localStorage.setItem('GPTJsSetting.alterTitle', 'false');
try { $('.ne21-inserted-ans').remove(); } catch { /* 忽略 */ }

// F9 显示/隐藏面板
function toggleBoxVisibility() {
    var $box = $('#ne-21box');
    if ($box.length === 0) {
        try { $box = $('#ne-21box', top.document); } catch { /* empty */ }
    }
    if ($box.length === 0) return;
    if (localStorage.getItem('GPTJsSetting.showBox') === 'hide') {
        $box.css('display', '');
        localStorage.setItem('GPTJsSetting.showBox', 'show');
        try { logger('F9 显示面板'); } catch { /* empty */ }
    } else {
        $box.css('display', 'none');
        localStorage.setItem('GPTJsSetting.showBox', 'hide');
    }
}
$(document).on('keydown.ne21f9', function (e) {
    if (e.keyCode === 120) toggleBoxVisibility();
});
try {
    if (top !== window) {
        $(top.document).on('keydown.ne21f9', function (e) {
            if (e.keyCode === 120) toggleBoxVisibility();
        });
    }
} catch { /* empty */ }

function waitForJQueryElement(selector, timeout) {
    return new Promise(function (resolve) {
        var interval = setInterval(function () {
            if ($(selector).length > 0) {
                clearInterval(interval);
                if (timer) clearTimeout(timer);
                resolve(true);
            }
        }, 500);
        var timer = null;
        if (timeout && timeout > 0) {
            timer = setTimeout(function () {
                clearInterval(interval);
                resolve(false);
            }, timeout);
        }
    });
}

// ==========================================
// checkJob 拦截守护
//
// 超星的 checkJob 决定"离开页面时是否弹未保存笔记提示"，它返回 false 才放行。
// 播放过程中超星会重新定义它，导致 toNext 的跳转被拦死，因此需要持续覆写。
//
// 旧实现是 setInterval 永不停机 —— 课程全部看完后仍以 3s 为间隔空转。
// 现改为：任务队列连续空转 60 秒才自停；并由 toNext()（所有跳转的唯一收口）
// 在下次导航时重新拉起。这样"正在跑"和"彻底看完"两种情况都是对的。
// ==========================================
var _checkJobGuard = null;
var _checkJobIdleTicks = 0;
function ensureCheckJobGuard() {
    if (_checkJobGuard !== null) return;
    _checkJobIdleTicks = 0;
    try { if (typeof top.checkJob === "function") top.checkJob = function () { return false; }; } catch { /* empty */ }
    _checkJobGuard = setInterval(function () {
        try { if (typeof top.checkJob === "function") top.checkJob = function () { return false; }; } catch { /* empty */ }
        var idle = (typeof _mlist === "undefined" || !_mlist || _mlist.length === 0);
        _checkJobIdleTicks = idle ? (_checkJobIdleTicks + 1) : 0;
        if (_checkJobIdleTicks >= 20) {
            clearInterval(_checkJobGuard);
            _checkJobGuard = null;
        }
    }, 3000);
}

if (window === top) {
    showBox();
}

if (_l.hostname.startsWith('i.mooc.') || _l.hostname.startsWith('i.chaoxing.com') || _l.hostname === 'i.chaoxing.com') {
    if (window === top) {
        if (_l.pathname.includes('/space/out_link.shtml')) {
            logger('检测到外链嵌套页面，脚本将在 iframe 内自动运行考试/作业', 'green');
        } else {
            logger('OpenAI学习通助手已就绪，进入课程视频、作业或考试页面即可自动运行', 'green');
        }
    }
} else if (_l.pathname == '/login') {
    // 自动登录（明文保存账号密码）已移除，登录页只保留浮窗。
    // 理由见 10-config.js 中的说明：脚本会自动更新，把密码写进来风险不可接受。
    showBox()
} else if (_l.pathname.includes('/mycourse/studentstudy')) {
    showBox()
    $('#ne-21log', window.parent.document).html('初始化完毕！')
    setupAntiSleep()
    setupAutoRefresh()
    // 持续拦截超星原生的自动跳转函数，防止平台在视频播放完成后自动跳转下一课时
    // 超星会在 studentstudy 页面通过 checkJob / PCount.next 等函数自动检测任务完成并跳转
    // 如果不拦截，长视频播完后超星会抢先跳转，导致多页面课时的后续页面被跳过
    setInterval(function () {
        try {
            if (typeof _w.checkJob === 'function' && !_w._gptCheckJobHooked) {
                _w._gptCheckJobHooked = true;
                _w.checkJob = function () { return false; };
            }
        } catch { /* empty */ }
        try {
            if (_w.PCount && typeof _w.PCount.next === 'function' && !_w.PCount._gptHooked) {
                var _origPCountNext = _w.PCount.next;
                _w.PCount.next = function () {
                    // 仅当脚本主动请求跳转时放行
                    if (_w._gptJsJumpAllowed) {
                        _w._gptJsJumpAllowed = false;
                        return _origPCountNext.apply(this, arguments);
                    }
                    console.log('[GPTJs] 拦截 PCount.next 自动跳转');
                    return false;
                };
                _w.PCount._gptHooked = true;
            }
        } catch { /* empty */ }
    }, 1000);
    // ===== 初次进入页面：自动检测并跳转至全课程第一个未完成小节 =====
    setTimeout(function () {
        try {
            if (_w._gptInitialSectionChecked) return;
            _w._gptInitialSectionChecked = true;
            if (localStorage.getItem("GPTJsSetting.isPaused") === "true") return;

            // 关键安全网：若子 iframe 已有视频/音频或任务点正在播放/解析，绝对不可打断
            var currentCardsDoc = (typeof getStudyCardsDocument === "function") ? getStudyCardsDocument(_w) : null;
            if (currentCardsDoc) {
                var activeMedia = currentCardsDoc.querySelector("video, audio");
                if (activeMedia && (!activeMedia.paused || !activeMedia.ended || activeMedia.currentTime > 0)) return;
                if (currentCardsDoc.querySelector(".ans-attach-ct, .ans-job-ct, iframe")) return;
            }

            var doc = _w.document;
            var curSection = doc.querySelector(".posCatalog_active");
            if (curSection) {
                var isDone = !!curSection.querySelector(".icon_Completed, .jobComplete, .icon_success");
                var tips = (curSection.querySelector(".prevHoverTips")?.innerText || "").trim();
                var pointsBadge = (curSection.querySelector(".catalog_points_count, .jobUnfinishCount, .orange, .posCatalog_points")?.innerText || "").trim();
                var hasUnfinishedPoints = /^[1-9]\d*$/.test(pointsBadge) || tips.includes("待完成") || tips.includes("未完成") || tips.includes("未做");
                // 严禁在当前小节仍有待完成任务点时误判已完成并自动跳走
                if (!hasUnfinishedPoints && (isDone || tips.includes("已完成") || pointsBadge === "0")) {
                    if (typeof isCurrentSectionFinished === "function" && !isCurrentSectionFinished(_w)) return;
                    var nextUnfinished = (typeof findNextUnfinishedSection === "function") ? findNextUnfinishedSection(_w) : null;
                    if (nextUnfinished && nextUnfinished.curid !== curSection.id) {
                        logger("检测到当前小节已完成，自动跨章节跳转至未完成小节：【" + nextUnfinished.name + "】开始看课", "blue");
                        if (typeof autoHandleChapterNoteModal === "function") autoHandleChapterNoteModal();
                        var clickTarget = nextUnfinished.element.querySelector(".posCatalog_name, .posCatalog_select, a") || nextUnfinished.element;
                        if (clickTarget) clickTarget.click();
                    }
                }
            }
        } catch { /* 忽略 */ }
    }, 3500);

    // ===== 无任务点检测（在 studentstudy 父页面监控 cards iframe）=====
    // cards 脚本未运行时由父页面兜底；只在同一文档加载完成后连续确认空页。
    var _blankSectionChecks = 0;
    var _lastBlankSectionDoc = null;
    setInterval(function () {
        var cardsDoc = getStudyCardsDocument(_w);
        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true' || !isEmptyStudyPage(cardsDoc)) {
            _blankSectionChecks = 0;
            _lastBlankSectionDoc = null;
            return;
        }
        if (cardsDoc !== _lastBlankSectionDoc) {
            _blankSectionChecks = 0;
            _lastBlankSectionDoc = cardsDoc;
        }
        _blankSectionChecks++;
        if (_blankSectionChecks >= 2) {
            _blankSectionChecks = 0;
            toNext(true);
        }
    }, 5000);
} else if (_l.pathname.includes('/knowledge/cards')) {
    setupAntiSleep()
    // 立即解除任何残留的切页自愈守护，杜绝新页面视频被旧守护定时器误切
    try {
        if (typeof stopNavigationWatchdog === 'function') stopNavigationWatchdog();
        if (window.top && typeof window.top.stopNavigationWatchdog === 'function') window.top.stopNavigationWatchdog();
    } catch { /* 忽略 */ }
    var params = getTaskParams()
    var parsedParams = null;
    if (params && params !== '$mArg') {
        try { parsedParams = $.parseJSON(params); } catch { parsedParams = null; }
    }
    if (!parsedParams || !parsedParams['attachments'] || parsedParams['attachments'].length <= 0) {
        logger('检测到无任务点（无任务参数），自动跳过', 'red')
        setTimeout(function () { toNext(true) }, 2000)
    } else {
        function startCardsMissionProcess() {
            ensureCheckJobGuard();
            _defaults = parsedParams["defaults"];
            // 收集所有 DOM 节点及其 iframe data 信息，用于和 attachments 精确匹配
            var allDomNodes = [];
            $.each($('.ans-attach-ct, .ans-job-ct, .wrap .ans-cc .ans-attach-ct'), function (i, t) {
                var iframeEl = $(t).find("iframe");
                var dataStr = "";
                try { dataStr = iframeEl.attr("data") || ""; } catch { /* empty */ }
                allDomNodes.push({ iframe: iframeEl, data: dataStr });
            });
            // 兜底：如果没在特定类名容器里找到 iframe，搜集页面所有的 iframe
            if (allDomNodes.length === 0) {
                $.each($("iframe"), function (i, iframeEl) {
                    var dataStr = "";
                    try { dataStr = $(iframeEl).attr("data") || ""; } catch { /* empty */ }
                    allDomNodes.push({ iframe: $(iframeEl), data: dataStr });
                });
            }

            // 过滤 attachments：只保留能在 DOM 中找到对应节点的附件
            var rawList = parsedParams["attachments"] || [];
            _mlist = [];
            _domList = [];
            var usedDomIndexes = {};
            for (var ai = 0; ai < rawList.length; ai++) {
                var att = rawList[ai];
                var attMid = (att["property"] && att["property"]["mid"]) || "";
                var attObjId = (att["property"] && att["property"]["objectid"]) || "";
                var matched = false;
                // 尝试通过 mid 或 objectid 在 DOM 节点的 iframe data 属性中精确匹配
                for (var di = 0; di < allDomNodes.length; di++) {
                    if (usedDomIndexes[di]) continue;
                    var dStr = allDomNodes[di].data;
                    if (dStr && ((attMid && dStr.indexOf(attMid) !== -1) || (attObjId && dStr.indexOf(attObjId) !== -1))) {
                        _mlist.push(att);
                        _domList.push(allDomNodes[di].iframe);
                        usedDomIndexes[di] = true;
                        matched = true;
                        break;
                    }
                }
                if (!matched) {
                    var skipType = att["type"] || (att["property"] && att["property"]["module"]) || "unknown";
                    var skipName = (att["property"] && att["property"]["name"]) || "";
                    // knowledgeGraph 类型没有标准 iframe data 属性，需特殊保留
                    if (skipType === "knowledgeGraph") {
                        _mlist.push(att);
                        _domList.push(null);
                        console.log("[GPTJs] 保留 knowledgeGraph 任务点: " + (skipName || "知识图谱"));
                    } else if (allDomNodes.length > 0 && ai < allDomNodes.length) {
                        // 若是常见任务点且页面有可用 iframe，直接对齐
                        _mlist.push(att);
                        _domList.push(allDomNodes[ai].iframe);
                        console.log("[GPTJs] DOM直接映射任务点: type=" + skipType + (skipName ? ", name=" + skipName : ""));
                    } else {
                        console.log("[GPTJs] 跳过无DOM对应的附件: type=" + skipType + (skipName ? ", name=" + skipName : ""));
                    }
                }
            }
            // 兜底：如果精确匹配未命中任何条目，回退到按索引对应
            if (_mlist.length === 0 && rawList.length > 0 && allDomNodes.length > 0) {
                console.log("[GPTJs] 精确匹配未命中，回退到索引对应模式");
                _mlist = rawList;
                _domList = [];
                for (var fi = 0; fi < allDomNodes.length; fi++) {
                    _domList.push(allDomNodes[fi].iframe);
                }
            }

            if (_mlist.length > 0) {
                missonStart();
            } else {
                logger("未检测到可执行任务点，准备切换下一节", "orange");
                setTimeout(function () { toNext(true); }, 2000);
            }
        }

        // 持续轮询检测任务节点，一旦出现立即启动解析执行，杜绝超时静止
        var _cardsPollTimer = null;
        var _cardsPollCount = 0;
        _cardsPollTimer = setInterval(function () {
            _cardsPollCount++;
            var hasDoms = document.querySelectorAll('.ans-attach-ct, .ans-job-ct, iframe, video, audio').length > 0;
            if (hasDoms || _cardsPollCount >= 10) {
                clearInterval(_cardsPollTimer);
                startCardsMissionProcess();
            }
        }, 600);
    }
} else if (_l.pathname.includes('/exam/test/reVersionTestStartNew')) {
    showBox()
    waitForJQueryElement('.mark_table .whiteDiv', 30000).then(function (found) { if (found) missonExam(); else logger('考试页等待超时（30s），未找到题目容器', 'red'); });
} else if (_l.pathname.includes('/mooc2/exam/preview')) {
    showBox()
    waitForJQueryElement('.mark_table .questionLi', 30000).then(function (found) { if (found) missonExamPreview(); else logger('整卷预览页等待超时（30s），未找到题目列表', 'red'); });
} else if (_l.pathname.includes('/mooc2/work/dowork')) {
    showBox()
    waitForJQueryElement('.mark_table form', 30000).then(function (found) { if (found) missonHomeWork(); else logger('作业页等待超时（30s），未找到作业表单', 'red'); });
} else if (_l.pathname.includes('/work/phone/doHomeWork')) {
    var _oldal = _w.alert
    _w.alert = function (msg) {
        if (msg == '保存成功') {
            return;
        }
        return _oldal(msg)
    }
    var _oldcf = _w.confirm
    _w.confirm = function (msg) {
        if (msg.includes('确认提交') || msg.includes('未做完')) {
            return true
        }
        return _oldcf(msg)
    }
} else if (_l.pathname.includes('/mooc2/exam/exam-list')) {
    // Swal.fire('OpenAI学习通助手提示', '注意：请谨慎使用脚本考试，开始考试之前请确保该账号已激活脚本。', 'info')
} else if (_l.pathname == '/mycourse/stu') {
    checkBrowser()
} else {
    // console.log(_l.pathname)
    if (window === top) {
        logger('OpenAI学习通助手已就绪，进入课程视频、作业或考试页面即可自动运行', 'green');
    }
}

function checkBrowser() {
    var ua = (navigator && navigator.userAgent) || '';
    var engine = 'Chromium';
    if (ua.indexOf('Firefox') !== -1) engine = 'Gecko (Firefox)';
    else if (ua.indexOf('Safari') !== -1 && ua.indexOf('Chrome') === -1) engine = 'WebKit (Safari)';
    else if (ua.indexOf('Edg') !== -1) engine = 'Edge (Chromium)';
    else if (ua.indexOf('Chrome') !== -1) engine = 'Chrome (Chromium)';
    return engine;
}

function parseUrlParams() {
    let query = window.location.search.substring(1);
    let vars = query.split("&");
    let _p = {}
    for (let i = 0; i < vars.length; i++) {
        let pair = vars[i].split("=");
        _p[pair[0]] = pair[1]
    }
    return _p
}


function updateLocalStorage(event) {
    var target = event.target;
    if (target.type === 'checkbox') {
        localStorage.setItem(target.id, target.checked);
    } else {
        localStorage.setItem(target.id, target.value);
    }
}

// 选项文本清洗。
//
// 旧实现是 `text().replace(/[ABCD]/g, '')`，会把正文里出现的 A/B/C/D 一并删掉：
//   "DATA"  -> "T"      "Bread" -> "read"      "C语言" -> "语言"
// 题干与选项因此失真，直接影响大模型判题准确率，也让"选项文本回填匹配"错位。
//
// 正确做法：只剥离「位于开头的选项标号」，形如
//   A.  A、  A．  A,  A:  A)  A）  （A）  (A)  【A】
// 并且要求标号后必须紧跟分隔符或右括号——单独一个字母（选项文字本身就是字母）
// 或正文里自然出现的字母一律保留。
// 需要匹配的控制字符（NUL..US 与 DEL）在这里集中定义。
// 不用正则字面量 /[\u0000-\u001f\u007f]/：字面量里出现控制字符会触发
// no-control-regex（拼接后的 work.js 会被脚本猫编辑器检查），
// 且可读性差。用 new RegExp + 字符串转义等价且干净。
// 用字符码拼装而不是写字面量：正则字面量与静态字符串参数都会被
// no-control-regex 拦（拼接后的 work.js 会被脚本猫编辑器检查）。
var _INVISIBLE_CHARS_RE = new RegExp(
    '[' + String.fromCharCode(0) + '-' + String.fromCharCode(31) + String.fromCharCode(127) + ']+',
    'g'
);

function tidyOptionText(text) {
    var s = String(text == null ? '' : text);
    // 折叠空白与不可见字符
    s = s.replace(_INVISIBLE_CHARS_RE, ' ').replace(/\s+/g, ' ').trim();
    // 情况一：括号包裹的标号，如 （A） (A) 【A】
    s = s.replace(/^[（([【]\s*[A-Za-z]\s*[）)\]】]\s*/, '');
    // 情况二：字母 + 分隔符，如 "A." "A、" "A:" "A）"
    s = s.replace(/^[A-Za-z]\s*[.、．,:：)）]\s*/, '');
    return s.trim();
}

// === 本地离线答案缓存模块（避免重复作答消耗 Token） ===
var localAnswerCache = {
    // 强哈希：优先复用 @require 引入的 md5；不可用时退化为覆盖全文的双 32 位 FNV-1a。
    // 历史缺陷：早期实现先 replace 再 slice(0,300) 才做 32 位滚动哈希，而 options 在
    // payload JSON 中排在 question 之后，会被整体截掉。阅读理解/完形填空等"共用同一题干
    // 前缀"的多个子题因此相互碰撞，会把上一小题的缓存答案填到当前小题，属于会直接答错题
    // 的缺陷。ans_v2_ 前缀使旧格式缓存键立即失效，避免历史脏数据继续被命中。
    _hash: function (text) {
        // 归一化空白（保留旧实现的容错：仅空白差异的同一题仍命中缓存），
        // 但不再 slice 截断——截断会把排在 question 之后的 options 一并丢掉。
        var str = String(text == null ? '' : text).replace(/\s+/g, '');
        if (!str) return '';
        if (typeof md5 === 'function') {
            return 'ans_v2_' + md5(str);
        }
        return 'ans_v2_' + this._fnv(str);
    },
    _fnv: function (str) {
        var h1 = 0x811c9dc5, h2 = 0xc2b2ae35;
        for (var i = 0; i < str.length; i++) {
            var c = str.charCodeAt(i);
            h1 = ((h1 ^ c) >>> 0);
            h1 = (h1 * 0x01000193) >>> 0;
            h2 = (h2 + c) >>> 0;
            h2 = (h2 ^ (h2 >>> 13)) >>> 0;
        }
        h1 = (h1 ^ str.length) >>> 0;
        h2 = (h2 ^ str.length) >>> 0;
        return ('00000000' + h1.toString(16)).slice(-8) + ('00000000' + h2.toString(16)).slice(-8);
    },
    get: function (qText) {
        try {
            var key = this._hash(qText);
            if (!key) return null;
            var item = localStorage.getItem('GPTJsCache.' + key);
            if (!item) return null;
            var data = JSON.parse(item);
            if (data && data.ans && (Date.now() - data.t < 30 * 86400000)) {
                return data.ans;
            }
        } catch { /* 忽略 */ }
        return null;
    },
    set: function (qText, answer) {
        try {
            var key = this._hash(qText);
            if (!key || !answer) return;
            localStorage.setItem('GPTJsCache.' + key, JSON.stringify({
                ans: answer,
                t: Date.now()
            }));
        } catch { /* 忽略 */ }
    }
};

// === 拟人化正态分布随机延时（防作弊节律检测） ===
function getHumanJitterDelay(baseMs) {
    var base = Number(baseMs) || 2500;
    if (base <= 0) return 0;
    // Box-Muller 算法产生标准正态分布随机数
    var u = 0, v = 0;
    while (u === 0) u = Math.random();
    while (v === 0) v = Math.random();
    var z = Math.sqrt(-2.0 * Math.log(u)) * Math.cos(2.0 * Math.PI * v);
    var jitter = z * (base * 0.18);
    var finalDelay = Math.round(base + jitter);
    return Math.max(800, finalDelay);
}

// === 题干与选项图像提取器（多模态视觉大模型支持） ===
// 多模态图片提取上限：与服务端保持一致，避免超过 body 上限后被 413 挡掉，
// 那时服务端的友好校验根本来不及触发，用户只看到一句"HTTP 413"。
var _MAX_QUESTION_IMAGES = 6;                 // 与服务端 LIMITS.maxImageCount 对齐
var _MAX_QUESTION_IMAGE_TOTAL = 5 * 1024 * 1024; // base64 总预算，需小于 JSON_BODY_LIMIT

function extractQuestionImages($el) {
    var images = [];
    var _totalBytes = 0;
    if (!$el || !$el.length) return images;
    try {
        $el.find('img').each(function () {
            var src = $(this).attr('src') || $(this).attr('data-src') || '';
            if (!src) return;
            var w = $(this).width(), h = $(this).height();
            if ((w > 0 && w < 16) || (h > 0 && h < 16)) return;
            if (/loading|logo|icon|spacer|clear\.gif/i.test(src)) return;
            if (src.startsWith('//')) src = location.protocol + src;
            else if (src.startsWith('/')) src = location.origin + src;
            if (images.indexOf(src) !== -1) return;
            if (images.length >= _MAX_QUESTION_IMAGES) return;
            // 远程图片只记 URL，体积由服务端/上游兜底
            images.push(src);
        });
        // 兼容学习通新版用 canvas 绘制公式/题干/选项的防爬机制
        $el.find('canvas').each(function () {
            try {
                // 达到数量或总量预算后停止导出：canvas.toDataURL 是同步重操作，
                // 既不截断会让请求体超限，也会让页面明显卡顿。
                if (images.length >= _MAX_QUESTION_IMAGES || _totalBytes >= _MAX_QUESTION_IMAGE_TOTAL) return false;
                var cvs = this;
                var cw = cvs.width || 0, ch = cvs.height || 0;
                if (cw <= 0 || ch <= 0) return;
                var exportCvs = cvs;
                // 高分屏/Retina 缩放优化：若单图分辨率超过 800px 等比降采样，显著降低网络耗时与视觉 Token 消耗
                if (cw > 800 || ch > 800) {
                    try {
                        var scale = Math.min(800 / cw, 800 / ch);
                        var downCanvas = document.createElement('canvas');
                        downCanvas.width = Math.round(cw * scale);
                        downCanvas.height = Math.round(ch * scale);
                        var ctx = downCanvas.getContext('2d');
                        if (ctx) {
                            ctx.drawImage(cvs, 0, 0, downCanvas.width, downCanvas.height);
                            exportCvs = downCanvas;
                        }
                    } catch { /* 降采样异常回退原图 */ }
                }
                var dataUrl = exportCvs.toDataURL('image/png');
                if (dataUrl && dataUrl.length > 200) {
                    if (images.indexOf(dataUrl) === -1) {
                        _totalBytes += dataUrl.length;
                        images.push(dataUrl);
                    }
                }
            } catch { /* 忽略 */ }
        });
    } catch { /* 忽略 */ }
    return images;
}

// 判断是否开启重做模式（不跳过已答题）


// ==========================================
// 拟人化三阶贝塞尔鼠标轨迹与微动作仿真系统 (Human-like Bezier Trajectory)
//
// 作用：
// 1. 模拟真实用户的非线性鼠标滑动轨迹（三阶贝塞尔曲线 + 随机控制点扰动），
//    抹除自动化脚本"无轨迹瞬移"的机器行为特征；
// 2. 在阅读文档、看视频过程中，周期性执行微小随机视口滑动与鼠标漫游；
// 3. 产生标准 MouseEvent（mousemove、mouseenter、mouseover、mousedown、mouseup、click）。
// ==========================================
function isHumanJitterEnabled() {
    try {
        var v = localStorage.getItem("GPTJsSetting.humanJitter");
        if (v !== null) return v === "true";
    } catch { /* 忽略 */ }
    return setting.humanJitter !== 0;
}

var _virtualMouse = {
    x: Math.floor(window.innerWidth * 0.3) || 200,
    y: Math.floor(window.innerHeight * 0.4) || 200
};

// 三阶贝塞尔曲线插值点计算
function ne21CubicBezier(p0, p1, p2, p3, t) {
    var u = 1 - t;
    var tt = t * t;
    var uu = u * u;
    var uuu = uu * u;
    var ttt = tt * t;
    return {
        x: Math.round(uuu * p0.x + 3 * uu * t * p1.x + 3 * u * tt * p2.x + ttt * p3.x),
        y: Math.round(uuu * p0.y + 3 * uu * t * p1.y + 3 * u * tt * p2.y + ttt * p3.y)
    };
}

// 派发真实规格的 MouseEvent（跨 iframe 上下文、Firefox Xray 及多内核 DOM 兼容）
function ne21DispatchMouseEvent(type, target, x, y) {
    if (!target) return;
    try {
        var doc = target.ownerDocument || document;
        var win = doc.defaultView || (typeof unsafeWindow !== 'undefined' ? unsafeWindow : window);
        var evt = null;
        // 1. 优先使用目标文档的 window.MouseEvent 构造器（跨 iframe 隔离最安全）
        try {
            if (typeof win.MouseEvent === 'function') {
                evt = new win.MouseEvent(type, {
                    view: win,
                    bubbles: true,
                    cancelable: true,
                    clientX: x,
                    clientY: y,
                    screenX: x + (win.screenX || 0),
                    screenY: y + (win.screenY || 0),
                    buttons: type === 'mousedown' ? 1 : 0
                });
            }
        } catch { /* 忽略 */ }
        // 2. 回退到当前沙箱上下文的 MouseEvent
        if (!evt) {
            try {
                evt = new MouseEvent(type, {
                    view: window,
                    bubbles: true,
                    cancelable: true,
                    clientX: x,
                    clientY: y,
                    buttons: type === 'mousedown' ? 1 : 0
                });
            } catch { /* 忽略 */ }
        }
        // 3. 回退到经典 DOM Level 2/3 Events（兼容双核浏览器兼容模式或旧引擎）
        if (!evt && doc.createEvent) {
            try {
                evt = doc.createEvent('MouseEvents');
                evt.initMouseEvent(type, true, true, win, 0, x, y, x, y, false, false, false, false, type === 'mousedown' ? 1 : 0, null);
            } catch { /* 忽略 */ }
        }
        if (evt) target.dispatchEvent(evt);
    } catch { /* 忽略 */ }
}

// 沿贝塞尔曲线将虚拟指针平滑移动到 (targetX, targetY)
function ne21SimulateBezierMove(targetX, targetY, durationMs, onComplete) {
    if (!isHumanJitterEnabled()) {
        _virtualMouse.x = targetX;
        _virtualMouse.y = targetY;
        if (typeof onComplete === 'function') onComplete();
        return;
    }
    durationMs = durationMs || Math.floor(Math.random() * 150 + 150);
    var p0 = { x: _virtualMouse.x, y: _virtualMouse.y };
    var p3 = { x: targetX, y: targetY };
    var dx = p3.x - p0.x;
    var dy = p3.y - p0.y;

    // 随机偏移控制点，形成自然弧线而非死板直线
    var jitter = Math.min(60, Math.max(15, Math.hypot(dx, dy) * 0.2));
    var p1 = {
        x: p0.x + dx * 0.25 + (Math.random() - 0.5) * jitter,
        y: p0.y + dy * 0.1 + (Math.random() - 0.5) * jitter
    };
    var p2 = {
        x: p0.x + dx * 0.75 + (Math.random() - 0.5) * jitter,
        y: p0.y + dy * 0.85 + (Math.random() - 0.5) * jitter
    };

    var steps = Math.max(6, Math.min(24, Math.floor(durationMs / 16)));
    var stepIndex = 0;

    var timer = setInterval(function () {
        stepIndex++;
        var t = stepIndex / steps;
        var pt = ne21CubicBezier(p0, p1, p2, p3, t);
        _virtualMouse.x = pt.x;
        _virtualMouse.y = pt.y;

        // 向当前坐标下方的主体元素派发 mousemove
        try {
            var el = document.elementFromPoint(pt.x, pt.y) || document.body;
            ne21DispatchMouseEvent('mousemove', el, pt.x, pt.y);
        } catch { /* 忽略 */ }

        if (stepIndex >= steps) {
            clearInterval(timer);
            if (typeof onComplete === 'function') onComplete();
        }
    }, Math.floor(durationMs / steps));
}

// 拟人化元素点击：先曲线滑动到元素上，再执行完整 mousedown -> mouseup -> click 序列
function ne21HumanClick(target, callback) {
    if (!target) return;
    var $el = $(target);
    if (!$el.length) return;
    var el = $el[0];

    try {
        var rect = el.getBoundingClientRect();
        // 随机落在元素安全内边距区域（30% ~ 70%）
        var targetX = Math.round(rect.left + rect.width * (0.3 + Math.random() * 0.4));
        var targetY = Math.round(rect.top + rect.height * (0.3 + Math.random() * 0.4));

        ne21SimulateBezierMove(targetX, targetY, null, function () {
            ne21DispatchMouseEvent('mouseover', el, targetX, targetY);
            ne21DispatchMouseEvent('mouseenter', el, targetX, targetY);
            ne21DispatchMouseEvent('mousedown', el, targetX, targetY);
            setTimeout(function () {
                ne21DispatchMouseEvent('mouseup', el, targetX, targetY);
                ne21DispatchMouseEvent('click', el, targetX, targetY);
                if (typeof el.click === 'function') el.click();
                if (typeof callback === 'function') callback();
            }, Math.floor(Math.random() * 50 + 30));
        });
    } catch {
        if (typeof el.click === 'function') el.click();
        if (typeof callback === 'function') callback();
    }
}

// 后台周期性自发微动作仿真（阅读与视频期间模拟人眼关注与微动）
var _microActionTimer = null;
function ne21StartMicroActions() {
    if (_microActionTimer) return;
    _microActionTimer = setInterval(function () {
        if (!isHumanJitterEnabled()) return;
        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') return;

        // 随机微小鼠标移动
        var winW = window.innerWidth || 800;
        var winH = window.innerHeight || 600;
        var nextX = Math.max(50, Math.min(winW - 50, _virtualMouse.x + Math.floor((Math.random() - 0.5) * 160)));
        var nextY = Math.max(50, Math.min(winH - 50, _virtualMouse.y + Math.floor((Math.random() - 0.5) * 120)));

        ne21SimulateBezierMove(nextX, nextY, Math.floor(Math.random() * 200 + 180), function () {
            // 20% 概率触发自然微滚动（下滚 8px 后自然回弹）
            if (Math.random() < 0.25) {
                try {
                    window.scrollBy({ top: 8, behavior: 'smooth' });
                    setTimeout(function () {
                        window.scrollBy({ top: -8, behavior: 'smooth' });
                    }, 400);
                } catch { /* 忽略 */ }
            }
        });
    }, Math.floor(Math.random() * 15000 + 20000)); // 20s ~ 35s
}

function ne21StopMicroActions() {
    if (_microActionTimer) {
        clearInterval(_microActionTimer);
        _microActionTimer = null;
    }
}

// ==========================================
// 答题思考停顿拟人化与审题微动作仿真
// ==========================================
function isThinkingPauseEnabled() {
    try {
        var v = localStorage.getItem("GPTJsSetting.thinkingPause");
        if (v !== null) return v === "true";
    } catch { /* 忽略 */ }
    return setting.thinkingPause !== 0;
}

// 根据题干字数动态计算拟人化思考与阅读延时（毫秒）
// 公式：基础约 5 秒（4.5~5.5 秒随机波动） + 每字 0.1 秒（100 毫秒），上下限平滑约束在 4~14.5 秒之间
function calcThinkingPauseDelay(textLength) {
    var len = Math.max(0, textLength || 0);
    var baseMs = 4500 + Math.random() * 1000;
    var readMs = Math.min(8500, len * 100);
    var total = Math.round(baseMs + readMs);
    return Math.max(4000, Math.min(14500, total));
}

// 模拟审题与作答期间的微动作（随机微小视口滚动、小弧度贝塞尔鼠标漫游、阅读悬停）
function ne21SimulateThinkingMicroActions(totalDurationMs) {
    if (!isHumanJitterEnabled()) return;
    var duration = totalDurationMs || 3000;
    var count = Math.min(3, Math.max(1, Math.floor(duration / 3200)));
    for (var i = 1; i <= count; i++) {
        (function (step) {
            var delay = Math.round(duration * (step / (count + 1)) + (Math.random() - 0.5) * 400);
            if (delay < 100) delay = 200;
            setTimeout(function () {
                var winW = window.innerWidth || 800;
                var winH = window.innerHeight || 600;
                var targetX = Math.round(winW * (0.2 + Math.random() * 0.6));
                var targetY = Math.round(winH * (0.25 + Math.random() * 0.5));
                ne21SimulateBezierMove(targetX, targetY, Math.floor(Math.random() * 160 + 140), function () {
                    if (Math.random() < 0.4) {
                        try {
                            window.scrollBy({
                                top: Math.round((Math.random() - 0.5) * 50),
                                behavior: "smooth"
                            });
                        } catch { /* 忽略 */ }
                    }
                });
            }, delay);
        })(i);
    }
}

function isRedoMode() {
    var stored = localStorage.getItem('GPTJsSetting.redo');
    if (stored !== null) return stored === 'true';
    return !!setting.redo;
}

// 判断是否开启相似度匹配
// 面板设置项 GPTJsSetting.fuzzyMatch（默认开启）。
// 历史实现恒返回 true，导致面板上这个开关是装饰性的——用户关掉它毫无效果。
function isFuzzyMatchEnabled() {
    try { return localStorage.getItem('GPTJsSetting.fuzzyMatch') !== 'false'; } catch { return true; }
}

// 计算两个字符串的相似度（基于Levenshtein距离），返回 0~1 之间的值，1表示完全相同
function stringSimilarity(s1, s2) {
    if (!s1 && !s2) return 1;
    if (!s1 || !s2) return 0;
    // 统一小写、去除首尾空白
    s1 = s1.toLowerCase().trim();
    s2 = s2.toLowerCase().trim();
    if (s1 === s2) return 1;
    var len1 = s1.length, len2 = s2.length;
    if (len1 === 0 || len2 === 0) return 0;
    // Levenshtein距离 - 空间优化版
    var prev = [], curr = [];
    for (let j = 0; j <= len2; j++) prev[j] = j;
    for (let i = 1; i <= len1; i++) {
        curr[0] = i;
        for (let j = 1; j <= len2; j++) {
            if (s1[i - 1] === s2[j - 1]) {
                curr[j] = prev[j - 1];
            } else {
                curr[j] = 1 + Math.min(prev[j], curr[j - 1], prev[j - 1]);
            }
        }
        var tmp = prev; prev = curr; curr = tmp;
    }
    var maxLen = Math.max(len1, len2);
    return 1 - prev[len2] / maxLen;
}

// 在选项数组中查找与AI回答最相似的选项，返回索引；相似度低于阈值时返回-1
// threshold 默认 0.5（50%相似度）
function findBestFuzzyMatch(optionTexts, aiAnswer, threshold) {
    if (!isFuzzyMatchEnabled()) return -1;
    if (!aiAnswer || !optionTexts || optionTexts.length === 0) return -1;
    threshold = (threshold !== undefined) ? threshold : 0.5;
    var bestIndex = -1, bestScore = 0;
    for (var i = 0; i < optionTexts.length; i++) {
        var score = stringSimilarity(optionTexts[i], aiAnswer);
        if (score > bestScore) {
            bestScore = score;
            bestIndex = i;
        }
    }
    if (bestScore >= threshold) {
        logger('相似度匹配: 最佳匹配项[' + bestIndex + '] 相似度=' + (bestScore * 100).toFixed(1) + '%', 'blue');
        return bestIndex;
    }
    logger('相似度匹配: 所有选项相似度均低于阈值(' + (threshold * 100) + '%)，最高=' + (bestScore * 100).toFixed(1) + '%', 'orange');
    return -1;
}

// 多选题模糊匹配：AI返回的答案用'|'分割后，对每个答案片段在选项中找最佳匹配
// 返回匹配到的选项索引数组
function findFuzzyMatchMultiple(optionTexts, aiAnswer, threshold) {
    if (!isFuzzyMatchEnabled()) return [];
    if (!aiAnswer || !optionTexts || optionTexts.length === 0) return [];
    threshold = (threshold !== undefined) ? threshold : 0.5;
    var parts = aiAnswer.split('|');
    var matched = [];
    for (var p = 0; p < parts.length; p++) {
        var part = parts[p].trim();
        if (!part) continue;
        var bestIndex = -1, bestScore = 0;
        for (var i = 0; i < optionTexts.length; i++) {
            var score = stringSimilarity(optionTexts[i], part);
            if (score > bestScore) {
                bestScore = score;
                bestIndex = i;
            }
        }
        if (bestScore >= threshold && matched.indexOf(bestIndex) === -1) {
            matched.push(bestIndex);
            logger('相似度匹配(多选): "' + part + '" → 选项[' + bestIndex + '] 相似度=' + (bestScore * 100).toFixed(1) + '%', 'blue');
        }
    }
    return matched;
}

function normalizeChoiceText(text) {
    return String(text == null ? '' : text)
        .replace(/<[^>]+>/g, '')
        .replace(/^[A-Z]\s*[.、．:：)）]?\s*/i, '')
        .replace(/[。，.,!！\s]/g, '')
        .toLowerCase()
        .trim();
}

function getAnswerLetterIndexes(answer, optionCount) {
    if (!answer || !optionCount) return [];
    var s = String(answer).toUpperCase();
    var clean = s.replace(/^(?:答案|正确答案|参考答案|选项)[\s:：[【]*/i, '').replace(/[\]】\s]+$/i, '').trim();
    var result = [];

    // 1. 检查纯字母组合如 "A", "AB", "ACD"
    // 要求：全是 A-Z，长度 <= optionCount，每个字母都必须严格在 [0, optionCount - 1] 范围内，且无重复字母
    if (/^[A-Z]+$/.test(clean) && clean.length <= optionCount) {
        var chars = clean.split('');
        var seen = {};
        var allValid = true;
        for (var i = 0; i < chars.length; i++) {
            var charIdx = chars[i].charCodeAt(0) - 65;
            if (charIdx < 0 || charIdx >= optionCount || seen[charIdx]) {
                allValid = false;
                break;
            }
            seen[charIdx] = true;
            result.push(charIdx);
        }
        if (allValid && result.length > 0) return result;
        result = [];
    }

    // 2. 检查 tokens 是否都是单字母如 "A | B" 或 "A, B" 或 "A. B."
    var tokens = clean.split(/[|#;；、,，\n\s]+/).filter(Boolean);
    if (tokens.length > 0 && tokens.length <= optionCount) {
        var allTokensAreLetters = tokens.every(function (t) { return /^[A-Z][.、．:：)）]?$/i.test(t); });
        if (allTokensAreLetters) {
            var seenTokens = {};
            var allTokensValid = true;
            for (var j = 0; j < tokens.length; j++) {
                var idx = tokens[j].charAt(0).toUpperCase().charCodeAt(0) - 65;
                if (idx < 0 || idx >= optionCount || seenTokens[idx]) {
                    allTokensValid = false;
                    break;
                }
                seenTokens[idx] = true;
                result.push(idx);
            }
            if (allTokensValid && result.length > 0) return result;
        }
    }

    return [];
}

function splitAiAnswers(answer) {
    return String(answer == null ? '' : answer)
        .split(/[|#;；\n]+/)
        .map(function (s) { return s.trim(); })
        .filter(Boolean);
}


// 获取期望正确率（默认 90%）
function getTargetAccuracy() {
    try {
        var stored = localStorage.getItem("GPTJsSetting.targetAccuracy");
        if (stored !== null) {
            var num = parseInt(stored, 10);
            if (isFinite(num) && num >= 50 && num <= 100) return num;
        }
    } catch { /* 忽略 */ }
    return (typeof setting !== "undefined" && setting && setting.targetAccuracy !== undefined) ? setting.targetAccuracy : 90;
}

// 智能错题判定与选项扰动控制（防止测验 100% 满分引发平台和任课教师风控）
function applyTargetAccuracyControl(matchedIndexes, count, isMultiple, allowMistake) {
    if (!matchedIndexes || matchedIndexes.length === 0 || count <= 1) return matchedIndexes;
    if (allowMistake === false) return matchedIndexes;

    var acc = getTargetAccuracy();
    if (acc >= 100) return matchedIndexes;

    // 随机掷骰：如果随机值大于期望正确率，则触发故意选错
    if (Math.random() * 100 <= acc) {
        return matchedIndexes;
    }

    if (isMultiple) {
        // 多选题故意错选：
        var unselected = [];
        for (var i = 0; i < count; i++) {
            if (matchedIndexes.indexOf(i) === -1) unselected.push(i);
        }
        var wrongSubset = matchedIndexes.slice();
        if (wrongSubset.length > 1 && (unselected.length === 0 || Math.random() < 0.5)) {
            var dropIdx = Math.floor(Math.random() * wrongSubset.length);
            wrongSubset.splice(dropIdx, 1);
        } else if (unselected.length > 0) {
            var addIdx = Math.floor(Math.random() * unselected.length);
            wrongSubset.push(unselected[addIdx]);
            wrongSubset.sort(function (a, b) { return a - b; });
        }
        logger("[防风控] 触发期望正确率(" + acc + "%)错题保护：多选题故意错选为 [" + wrongSubset.map(function (idx) { return String.fromCharCode(65 + idx); }).join(", ") + "]（原正确: [" + matchedIndexes.map(function (idx) { return String.fromCharCode(65 + idx); }).join(", ") + "]）", "orange");
        return wrongSubset;
    } else {
        // 单选题故意选错：从除正确选项外的其余候选项中随机挑一个
        var wrongOptions = [];
        for (var j = 0; j < count; j++) {
            if (matchedIndexes.indexOf(j) === -1) wrongOptions.push(j);
        }
        if (wrongOptions.length > 0) {
            var picked = wrongOptions[Math.floor(Math.random() * wrongOptions.length)];
            logger("[防风控] 触发期望正确率(" + acc + "%)错题保护：单选题故意选错为 " + String.fromCharCode(65 + picked) + "（原正确: " + String.fromCharCode(65 + matchedIndexes[0]) + "）", "orange");
            return [picked];
        }
    }
    return matchedIndexes;
}

// 判断题智能错题控制
function applyJudgeTargetAccuracyControl(matchedIndex, count, allowMistake) {
    if (matchedIndex === -1 || count <= 1) return matchedIndex;
    if (allowMistake === false) return matchedIndex;

    var acc = getTargetAccuracy();
    if (acc >= 100) return matchedIndex;

    if (Math.random() * 100 <= acc) {
        return matchedIndex;
    }

    var wrongIndex = matchedIndex === 0 ? 1 : 0;
    if (wrongIndex < count) {
        logger("[防风控] 触发期望正确率(" + acc + "%)错题保护：判断题故意反选为 " + (wrongIndex === 0 ? "正确" : "错误"), "orange");
        return wrongIndex;
    }
    return matchedIndex;
}

// 通用选项匹配：支持字符串数组或 DOM/jQuery 元素集合，支持纯字母(A/B/C/D)、带字母选项(A. 选项)、纯文本、相似度匹配
function findOptionIndexes(optionsOrEles, aiAnswer, isMultiple, allowMistake) {
    if (!aiAnswer || !optionsOrEles || optionsOrEles.length === 0) return [];
    var count = optionsOrEles.length;
    var optionTexts = [];
    for (var i = 0; i < count; i++) {
        var item = optionsOrEles[i];
        if (typeof item === 'string') {
            optionTexts.push(item);
        } else if (item) {
            var $item = $(item);
            var selfText = ($item.text() || '').trim();
            var parentText = ($item.parent().text() || '').trim();
            if (!/^[A-Z][.、．:：)）\s]/i.test(selfText) && /^[A-Z][.、．:：)）\s]/i.test(parentText)) {
                optionTexts.push(parentText);
            } else {
                optionTexts.push(selfText || parentText || tidyStr($item.html() || ''));
            }
        }
    }

    var rawAnswer = String(aiAnswer).trim();
    var cleanAnswer = rawAnswer.replace(/^(?:答案|正确答案|参考答案)[\s:：]*/i, '').trim();

    // 1. 纯字母组合提取 (A, B, A|B, ACD, A,B,C)
    var letterIndexes = getAnswerLetterIndexes(cleanAnswer, count);
    if (letterIndexes.length > 0) {
        var res1 = isMultiple ? letterIndexes : [letterIndexes[0]];
        return applyTargetAccuracyControl(res1, count, isMultiple, allowMistake);
    }

    // 2. 检查是否有形如 'A. 文本' 的 AI 回复，提取各片段开头的选项字母
    var parts = splitAiAnswers(cleanAnswer);
    if (parts.length === 0 && cleanAnswer) parts = [cleanAnswer];

    var letterMatched = [];
    parts.forEach(function (part) {
        var m = part.match(/^([A-Z])[.、．:：)）\s]/i);
        if (m) {
            var idx = m[1].toUpperCase().charCodeAt(0) - 65;
            if (idx >= 0 && idx < count && letterMatched.indexOf(idx) === -1) letterMatched.push(idx);
        }
    });
    if (letterMatched.length > 0 && (isMultiple || letterMatched.length === 1)) {
        var res2 = isMultiple ? letterMatched : [letterMatched[0]];
        return applyTargetAccuracyControl(res2, count, isMultiple, allowMistake);
    }

    // 3. 文本归一化匹配（完全匹配与互相包含）
    var normOptions = optionTexts.map(normalizeChoiceText);
    var normParts = parts.map(normalizeChoiceText).filter(Boolean);
    if (normParts.length === 0 && cleanAnswer) normParts = [normalizeChoiceText(cleanAnswer)];

    var textMatched = [];
    normParts.forEach(function (part) {
        if (!part) return;
        var exactIdx = normOptions.indexOf(part);
        if (exactIdx !== -1 && textMatched.indexOf(exactIdx) === -1) {
            textMatched.push(exactIdx);
            return;
        }
        for (var oi = 0; oi < normOptions.length; oi++) {
            if (textMatched.indexOf(oi) !== -1) continue;
            if (normOptions[oi].length > 0 && (normOptions[oi].indexOf(part) !== -1 || part.indexOf(normOptions[oi]) !== -1)) {
                textMatched.push(oi);
                return;
            }
        }
    });

    if (textMatched.length > 0) {
        var res3 = isMultiple ? textMatched : [textMatched[0]];
        return applyTargetAccuracyControl(res3, count, isMultiple, allowMistake);
    }

    // 4. 相似度模糊匹配兜底
    if (isFuzzyMatchEnabled()) {
        normParts.forEach(function (part) {
            if (!part) return;
            var bestIdx = -1, bestScore = 0;
            for (var oi = 0; oi < normOptions.length; oi++) {
                if (textMatched.indexOf(oi) !== -1) continue;
                var score = stringSimilarity(normOptions[oi], part);
                if (score > bestScore) {
                    bestScore = score;
                    bestIdx = oi;
                }
            }
            if (bestScore >= 0.45 && bestIdx !== -1 && textMatched.indexOf(bestIdx) === -1) {
                textMatched.push(bestIdx);
            }
        });
    }

    var finalIndexes = isMultiple ? textMatched : textMatched.slice(0, 1);
    return applyTargetAccuracyControl(finalIndexes, count, isMultiple, allowMistake);
}

// 视频弹题匹配转接
function findVideoQuizMatchIndexes(optionTexts, aiAnswer, isMultiple) {
    return findOptionIndexes(optionTexts, aiAnswer, isMultiple, false);
}

// 统一判断题匹配
function matchJudgeOptionIndex(optionsOrEles, aiAnswer, allowMistake) {
    if (!aiAnswer || !optionsOrEles || optionsOrEles.length === 0) return -1;
    var count = optionsOrEles.length;
    var optionTexts = [];
    for (var i = 0; i < count; i++) {
        var item = optionsOrEles[i];
        if (typeof item === 'string') {
            optionTexts.push(item);
        } else if (item) {
            var $item = $(item);
            var selfText = ($item.text() || '').trim();
            var parentText = ($item.parent().text() || '').trim();
            optionTexts.push(parentText || selfText);
        }
    }

    var s = String(aiAnswer).replace(/[。，.,!！\s]/g, '').toLowerCase();

    // 1. 如果 AI 返回的是选项字母 A / B
    if (/^[A-B]$/i.test(s)) {
        var idx = s.toUpperCase().charCodeAt(0) - 65;
        if (idx >= 0 && idx < count) return applyJudgeTargetAccuracyControl(idx, count, allowMistake);
    }

    // 2. 语义归一：统一走 parseJudgeAnswer（a0-question-dom.js）。
    //    这里曾内置一份 own 判定，负向词整组跑完才跑正向词，导致 "不正确"/"不对"/"不是"
    //    全部命中正向词被判成 true —— 与 parseJudgeAnswer 里已修掉的是同一个 bug，
    //    不再各写一份。
    var verdict = (typeof parseJudgeAnswer === 'function') ? parseJudgeAnswer(aiAnswer) : null;
    var isTrue = verdict === null ? null : verdict === 'true';

    if (isTrue !== null) {
        // 扫的是"选项文本"（本身就是正确/错误这类词），因此这里用单字是安全的。
        // 与 parseJudgeAnswer 面向 AI 自由回答的单字策略有意不同，不要互相"统一"。
        var trueWords = ['正确', '对', '√', 'true', 'right', 'yes'];
        var falseWords = ['错误', '错', '否', '×', 'false', 'wrong'];
        var words = isTrue ? trueWords : falseWords;
        for (var o = 0; o < optionTexts.length; o++) {
            var optText = String(optionTexts[o] || '').toLowerCase();
            for (var w = 0; w < words.length; w++) {
                if (optText.indexOf(words[w]) !== -1) return applyJudgeTargetAccuracyControl(o, count, allowMistake);
            }
        }
        if (count === 2) {
            var judgeIdx = isTrue ? 0 : 1;
            return applyJudgeTargetAccuracyControl(judgeIdx, count, allowMistake);
        }
    }

    // 3. 兜底回退到通用选项匹配
    var fallback = findOptionIndexes(optionTexts, aiAnswer, false, allowMistake);
    return fallback.length > 0 ? fallback[0] : -1;
}

// 选择选择题选项：完全参考 main.js 机制，精准定位选项直接父级触发一次点击，并提供已选检测
function selectChoiceOption(el, isMultiple) {
    if (!el) return;
    var $el = $(el);
    var domEl = $el[0];
    if (!domEl) return;

    // 与 main.js 保持完全一致的目标定位：
    // 若 el 自身是 li（如移动端列表），目标为 el；
    // 否则一律取 el 的直接父级 parent()（如网页端 .answer_p 或 a 的直接父级 .clearfix.answerBg 或 li）
    // 【核心关键】严禁使用 closest('li')！超星作业/考试中整道大题本身就是 <li class="questionLi">，closest 会误取到整道大题导致点击失效！
    var $parent = $el.parent();
    var $target = $el.is('li') ? $el : ($parent.length > 0 && !$parent.is('body, html, form, .mark_table, .stem_answer, .Answer') ? $parent : $el);

    // 好学生模式：仅加粗不点击
    if (localStorage.getItem('GPTJsSetting.goodStudent') === 'true') {
        $target.find('span').css('font-weight', 'bold');
        $el.css('font-weight', 'bold');
        return;
    }

    // 与 main.js 保持完全一致的已选状态检测（仅检测当前选项范围，防止多选重复点击导致反选取消）
    var spanClass = ($target.find('span').attr('class') || '') + ' ' + ($target.attr('class') || '') + ' ' + ($el.attr('class') || '');
    if (isMultiple) {
        if (spanClass.indexOf('check_answer_dx') !== -1) {
            return; // 多选题当前选项已选中，跳过防反选取消
        }
    } else {
        if (spanClass.indexOf('check_answer') !== -1) {
            return; // 单选/判断题当前选项已选中，跳过
        }
    }

    // 拟人化微触：在点击前派发真实的 mouseover / mouseenter 事件
    if (typeof isHumanJitterEnabled === "function" && isHumanJitterEnabled() && domEl) {
        try {
            var rect = domEl.getBoundingClientRect();
            if (rect.width > 0 && rect.height > 0) {
                var tx = Math.round(rect.left + rect.width * (0.3 + Math.random() * 0.4));
                var ty = Math.round(rect.top + rect.height * (0.3 + Math.random() * 0.4));
                ne21DispatchMouseEvent("mouseover", domEl, tx, ty);
                ne21DispatchMouseEvent("mouseenter", domEl, tx, ty);
            }
        } catch { /* 忽略 */ }
    }

    // 核心点击：完全参考 main.js 机制，精准触发一次目标点击 ($(_answerTmpArr[i]).parent().click())
    try {
        $target.click();
    } catch {
        if ($target[0] && typeof $target[0].click === 'function') {
            try { $target[0].click(); } catch { /* 忽略 */ }
        }
    }

    // 3. 兜底同步原生 input[type="radio"]/input[type="checkbox"] 状态
    var $chk = $target.find('input[type="checkbox"], input[type="radio"]');
    if ($chk.length > 0) {
        $chk.each(function () {
            if (!this.checked) {
                this.checked = true;
                try { this.dispatchEvent(new Event('change', { bubbles: true })); } catch { /* 忽略 */ }
            }
        });
    }
}

// 清洗填空题单个空的答案文本
function cleanBlankItem(item) {
    if (item == null) return '';
    var str = String(item).trim();
    // 移除 markdown 加粗/斜体等标记
    str = str.replace(/^\*{1,2}|\*{1,2}$/g, '').trim();
    // 移除两端各种引号、括号
    str = str.replace(/^["'“‘（(【[]+|["'”’）)】\]]+$/g, '').trim();
    // 移除开头的题号、空号（如 "1.", "第1空:", "空1:", "①", "(1)"）
    str = str.replace(/^(?:第\s*[0-9一二三四五六七八九十]+\s*空|空\s*[0-9一二三四五六七八九十]+|[0-9一二三四五六七八九十]+[、.．:：)）]|\([0-9一二三四五六七八九十]+\)|（[0-9一二三四五六七八九十]+）|[①②③④⑤⑥⑦⑧⑨⑩])\s*[:：]?\s*/i, '');
    // 移除开头的"答案:"、"答:"
    str = str.replace(/^(?:答案|答|正确答案|参考答案)\s*[:：]?\s*/i, '');
    // 再次去除首尾引号与括号
    str = str.replace(/^["'“‘（(【[]+|["'”’）)】\]]+$/g, '').trim();
    // 移除尾部标点
    str = str.replace(/[;；,，。]+$/, '').trim();
    return str;
}

// 补全或截断填空题答案数组，保证长度与预期空数一致，不足时留空，绝不重复填充第一空
function padOrTrimBlankAnswers(arr, expectedCount) {
    if (!expectedCount || expectedCount <= 0) return arr;
    if (arr.length >= expectedCount) {
        return arr.slice(0, expectedCount);
    }
    var res = arr.slice();
    while (res.length < expectedCount) {
        res.push('');
    }
    return res;
}

// 解析多空填空题的 AI 回答文本
function splitMultiBlankAnswers(rawAnswer, expectedCount) {
    if (!rawAnswer) return padOrTrimBlankAnswers([], expectedCount);
    var str = String(rawAnswer).trim();
    // 移除外层包裹的 markdown 代码块
    str = str.replace(/^```(?:json|markdown|text)?\s*/i, '').replace(/\s*```$/i, '').trim();
    // 移除常见总前缀
    str = str.replace(/^(?:【答案】|【参考答案】|答案[：:]|答[：:]|参考答案[：:]|回答[：:]|正确答案[：:])\s*/i, '').trim();

    expectedCount = expectedCount || 1;

    // 1. 如果包含竖线 '|' 或 '###' 分隔符（最高优先级）
    if (str.indexOf('|') !== -1) {
        var parts = str.split('|').map(cleanBlankItem).filter(function (s) { return s !== ''; });
        if (parts.length > 0) return padOrTrimBlankAnswers(parts, expectedCount);
    }
    if (str.indexOf('###') !== -1) {
        // 注意：这里不能再用 var 声明 parts（上面的分支已声明过），复用同一变量
        parts = str.split('###').map(cleanBlankItem).filter(function (s) { return s !== ''; });
        if (parts.length > 0) return padOrTrimBlankAnswers(parts, expectedCount);
    }

    // 2. 按序号/空号分割（如 "第1空：xxx 第2空：yyy" 或 "1. xxx 2. yyy" 或 "① xxx ② yyy" 或 "(1) xxx (2) yyy"）
    var splitByNumRegex = /(?:^|\s+|[;；,，\n])(?:第\s*[0-9一二三四五六七八九十]+\s*空|空\s*[0-9一二三四五六七八九十]+|[0-9一二三四五六七八九十]+[、.．:：)）]|\([0-9一二三四五六七八九十]+\)|（[0-9一二三四五六七八九十]+）|[①②③④⑤⑥⑦⑧⑨⑩])\s*[:：]?\s*/gi;
    var numParts = str.split(splitByNumRegex).map(cleanBlankItem).filter(function (s) { return s !== ''; });
    if (numParts.length >= 2 || (numParts.length > 0 && numParts.length === expectedCount && expectedCount > 1)) {
        return padOrTrimBlankAnswers(numParts, expectedCount);
    }

    // 3. 换行分割
    var lineParts = str.split(/\r?\n+/).map(cleanBlankItem).filter(function (s) { return s !== ''; });
    if (lineParts.length >= 2 || (lineParts.length > 0 && lineParts.length === expectedCount && expectedCount > 1)) {
        return padOrTrimBlankAnswers(lineParts, expectedCount);
    }

    // 4. 分号分割 (; 或 ；)
    var semiParts = str.split(/[;；]+/).map(cleanBlankItem).filter(function (s) { return s !== ''; });
    if (semiParts.length >= 2 || (semiParts.length > 0 && semiParts.length === expectedCount && expectedCount > 1)) {
        return padOrTrimBlankAnswers(semiParts, expectedCount);
    }

    // 5. 顿号分割 (、)
    var dunParts = str.split(/[、]+/).map(cleanBlankItem).filter(function (s) { return s !== ''; });
    if (dunParts.length >= 2 || (dunParts.length > 0 && dunParts.length === expectedCount && expectedCount > 1)) {
        return padOrTrimBlankAnswers(dunParts, expectedCount);
    }

    // 6. 逗号分割 (, 或 ，)
    var commaParts = str.split(/[,，]+/).map(cleanBlankItem).filter(function (s) { return s !== ''; });
    if (commaParts.length >= 2 || (commaParts.length > 0 && commaParts.length === expectedCount && expectedCount > 1)) {
        return padOrTrimBlankAnswers(commaParts, expectedCount);
    }

    // 7. 当预期空数等于 2 时，尝试连词分割（如 "纯职责链模式 和 不纯职责链模式"）
    if (expectedCount === 2) {
        var conjParts = str.split(/\s*(?:和|与|及)\s*/).map(cleanBlankItem).filter(function (s) { return s !== ''; });
        if (conjParts.length === 2) {
            return conjParts;
        }
    }

    // 8. 兜底：单一结果
    var single = cleanBlankItem(str);
    return padOrTrimBlankAnswers(single ? [single] : [], expectedCount);
}

// 获取单个填空所独占的编辑器区域（严格隔离，绝不越界至包含其他空的父容器）
// 统一辅助函数：判断文本是否为无效/占位答案（杜绝将“第1空”或序号占位误判为已作答）
// 把答案文本安全地嵌进富文本容器（UEditor iframe / contenteditable）。
// 答案来自远端大模型，属于不可信输入：直接拼进 innerHTML 会在学习通页面上下文
// 形成 XSS（该沙箱持有 GM_xmlhttpRequest / GM_setValue 等特权 API）。
// 这里统一转义，仅把换行还原为 <br>，保证纯文本答案的正常显示。
function ne21AnswerToSafeHtml(text) {
    var s = text == null ? '' : String(text);
    return ne21EscapeHtml(s).replace(/\r\n|\r|\n/g, '<br>');
}

// 统一写入填空题与简答题/主观题/写作/翻译的输入区域（严格对齐 main.js 实现，支持直接输入框与包装容器）
function fillAnswerTextarea(el, text, timuContainer) {
    if (!el) return;
    var $el = $(el);
    var val = text == null ? '' : String(text);
    // 移除“第.空:”等前缀（完全对齐 main.js: this.setContent(t[e].replace(/第.空:/g, ""))）
    val = val.replace(/^第\s*\d+\s*空\s*[:：]?\s*/g, '').replace(/第.空:/g, '').trim();

    // 收集所有可填充的目标元素（支持自身是 input/textarea，也支持传进来的是外层包裹容器）
    var targetElements = [];
    if ($el.is('input, textarea')) {
        targetElements.push($el);
    } else {
        var $inner = $el.find('textarea, input[type="text"], input:not([type])');
        if ($inner.length > 0) {
            $inner.each(function () { targetElements.push($(this)); });
        } else {
            targetElements.push($el);
        }
    }

    var ueObj = (typeof unsafeWindow !== 'undefined' && unsafeWindow && unsafeWindow.UE) ||
                (typeof UE !== 'undefined' && UE) ||
                (typeof _w !== 'undefined' && _w && _w.UE) ||
                (typeof contextWindow !== 'undefined' && contextWindow && contextWindow.UE) ||
                (typeof top !== 'undefined' && top && top.UE) ||
                (typeof window !== 'undefined' && window.parent && window.parent.UE) ||
                (typeof window !== 'undefined' && window.UE);

    targetElements.forEach(function ($target) {
        var domEl = $target[0];
        var editorName = $target.attr('name') || $target.attr('id');
        var editorId = $target.attr('id') || $target.attr('name');

        // 1. 优先调用 UEditor 的 setContent（完全遵循 main.js: W.UE.getEditor(D(this).attr("name")).ready(...)）
        if (editorName && ueObj && typeof ueObj.getEditor === 'function') {
            try {
                var ueInstance = ueObj.getEditor(editorName) || (editorId && ueObj.getEditor(editorId));
                if (ueInstance) {
                    if (typeof ueInstance.ready === 'function') {
                        ueInstance.ready(function () {
                            this.setContent(val);
                        });
                    }
                    if (typeof ueInstance.setContent === 'function') {
                        try { ueInstance.setContent(val); } catch { /* 忽略 */ }
                    }
                }
            } catch { /* ignore */ }
        }

        // 1.1 针对移动端/触屏端 ExtJS
        try {
            var extObj = (typeof unsafeWindow !== 'undefined' && unsafeWindow && unsafeWindow.Ext) ||
                         (typeof Ext !== 'undefined' && Ext) ||
                         (typeof _w !== 'undefined' && _w && _w.Ext);
            if (extObj && typeof extObj.getCmp === 'function' && editorId) {
                var cmp = extObj.getCmp(editorId);
                if (cmp && typeof cmp.setValue === 'function') {
                    cmp.setValue(val);
                }
            }
        } catch { /* 忽略 */ }

        // 2. 更新 textarea / input 元素自身值并派发 input、change、blur 事件
        try {
            if ($target.is('input, textarea')) {
                $target.val(val);
                if (domEl) domEl.value = val;
                $target.trigger('input').trigger('change').trigger('blur');
                if (domEl) {
                    domEl.dispatchEvent(new Event('input', { bubbles: true }));
                    domEl.dispatchEvent(new Event('change', { bubbles: true }));
                }
            }
        } catch { /* 忽略 */ }

        // 3. 针对 contenteditable 或 iframe 富文本内部设值
        try {
            var $editables = $target.parent().find('[contenteditable="true"], iframe');
            $editables.each(function () {
                if (this.tagName && this.tagName.toLowerCase() === 'iframe') {
                    try {
                        var doc = this.contentDocument || this.contentWindow.document;
                        if (doc && doc.body) {
                            doc.body.innerHTML = '<p>' + ne21AnswerToSafeHtml(val) + '</p>';
                            doc.body.dispatchEvent(new Event('input', { bubbles: true }));
                        }
                    } catch { /* 忽略 */ }
                } else if ($(this).is('[contenteditable="true"]')) {
                    this.innerHTML = '<p>' + ne21AnswerToSafeHtml(val) + '</p>';
                    this.dispatchEvent(new Event('input', { bubbles: true }));
                }
            });
        } catch { /* 忽略 */ }
    });

    // 4. 点击超星题目保存按钮（完全对齐 main.js: null == (i = D(a.html).find(".savebtndiv>a")) || i.click();）
    if (timuContainer) {
        setTimeout(function () {
            try {
                var $saveBtn = $(timuContainer).find('.savebtndiv > a, .savebtndiv a, a.savebtn');
                if ($saveBtn.length > 0) {
                    $saveBtn[0].click();
                }
            } catch { /* 忽略 */ }
        }, 400);
    }
}
function getVideoQuizText(container, optionNodes) {
    var clone = container.cloneNode(true);
    try {
        Array.prototype.forEach.call(clone.querySelectorAll('.ans-videoquiz-opt, #videoquiz-submit, button, input, label'), function (node) {
            if (node.parentNode) node.parentNode.removeChild(node);
        });
    } catch { /* empty */ }
    var text = (clone.innerText || clone.textContent || '').trim();
    if (!text) {
        var title = container.querySelector('.ans-videoquiz-title, .ans-videoquiz-subject, .ans-videoquiz-question, .videoquiz-title, .videoquiz-question');
        text = title ? (title.innerText || title.textContent || '').trim() : '';
    }
    optionNodes.forEach(function (label) {
        var optText = (label.innerText || label.textContent || '').trim();
        if (optText) text = text.replace(optText, '');
    });
    return text.replace(/\s+/g, ' ').trim();
}

function handleVideoQuiz(doc, media, taskName) {
    if (!setting.work || localStorage.getItem('GPTJsSetting.isPaused') === 'true') return false;
    var container = doc.querySelector('.ans-videoquiz');
    var submitBtn = doc.querySelector('#videoquiz-submit');
    if (!container || !submitBtn) return false;

    // 1. 开头拦截：如果已经答对，页面上有“继续学习”或“恭喜你，答对了！”，说明未关闭，直接点击继续学习并强行删除它
    var quizText = container.innerText || '';
    if (quizText.indexOf('恭喜你，答对了！') !== -1 || quizText.indexOf('继续学习') !== -1) {
        logger('弹题已答对，尝试点击“继续学习”并清理弹窗', 'green');
        var btn = Array.prototype.slice.call(container.querySelectorAll('a, button, span, div')).find(function (el) {
            var txt = (el.innerText || el.textContent || '').trim();
            return txt === '继续学习' || txt.indexOf('继续') !== -1;
        });
        if (btn) {
            try { btn.click(); } catch { /* 忽略 */ }
        }
        setTimeout(function () {
            try {
                if (container && container.parentNode) container.parentNode.removeChild(container);
                Array.prototype.forEach.call(doc.querySelectorAll('.x-component-default'), function (node) {
                    node.style.display = 'none';
                });
                if (media && media.paused && localStorage.getItem('GPTJsSetting.isPaused') !== 'true') media.play();
            } catch { /* 忽略 */ }
        }, 800);
        return true;
    }

    if (container.getAttribute('data-ne21-status') === 'processing') return true;

    var optionNodes = Array.prototype.slice.call(container.querySelectorAll('.ans-videoquiz-opt label'));
    if (optionNodes.length === 0) optionNodes = Array.prototype.slice.call(container.querySelectorAll('label'));
    if (optionNodes.length === 0) return false;

    container.setAttribute('data-ne21-status', 'processing');
    try { media.pause(); } catch { /* empty */ }

    var optionTexts = optionNodes.map(function (label) { return (label.innerText || label.textContent || '').trim(); });
    var inputTypes = optionNodes.map(function (label) {
        var input = label.querySelector('input');
        return input ? String(input.type || '').toLowerCase() : '';
    });
    var isMultiple = inputTypes.indexOf('checkbox') !== -1;
    var isJudge = !isMultiple && optionTexts.length === 2 && optionTexts.some(function (t) { return /正确|错误|对|错|是|否|true|false/i.test(t); });
    var question = getVideoQuizText(container, optionNodes) || '视频弹题';
    var typeName = isMultiple ? '多选题' : (isJudge ? '判断题' : '单选题');

    // 初始化失败记录
    window._failedVideoQuizzes = window._failedVideoQuizzes || {};
    if (!window._failedVideoQuizzes[question]) {
        window._failedVideoQuizzes[question] = {
            triedSets: [],       // 已试过的"答案组合"，元素为 join('+') 后的字符串
            pendingSet: null,    // 上一次提交、尚待判定对错的组合
            errorCount: 0        // AI 调用连续失败次数（防止网络异常时无限重刷）
        };
    }

    var quizRecord = window._failedVideoQuizzes[question];
    if (!quizRecord.triedSets) quizRecord.triedSets = [];
    if (!quizRecord.pendingSet) quizRecord.pendingSet = null;
    if (!quizRecord.errorCount) quizRecord.errorCount = 0;

    // 上一轮提交后弹窗又原样回来了，说明那个组合错了 —— 记入已试集合。
    // 注意必须在每次进入时都做，否则排除法永远只围绕第一组打转。
    if (quizRecord.pendingSet) {
        var _key = quizRecord.pendingSet.slice().sort(function (a, b) { return a - b; }).join('+');
        if (quizRecord.triedSets.indexOf(_key) === -1) quizRecord.triedSets.push(_key);
        quizRecord.pendingSet = null;
    }

    // 已试组合达到上限就整体重置，避免同一题永久消耗任务时间。
    // 旧实现用 triedIndexes 记录"试过的单个选项"，对多选题是致命的：
    // 多选题正确答案通常是 2 个以上选项，逐个单猜永远不中，打满后重置、
    // 从头再来，形成死循环，视频永远停在这一题。
    var _MAX_QUIZ_RETRY = isMultiple ? 10 : 12;
    if (quizRecord.triedSets.length >= _MAX_QUIZ_RETRY) {
        logger('视频弹题已尝试 ' + _MAX_QUIZ_RETRY + ' 组答案仍未通过，放弃本题继续播放', 'orange');
        quizRecord.triedSets = [];
    }

    // 组合枚举顺序：单选题逐个试；多选题先单个、再两两组合，最后全选兜底。
    // 有上限（_MAX_QUIZ_RETRY）防止组合爆炸，也避免把账号刷进风控。
    function buildRetryCandidates() {
        var remaining = [];
        for (var i = 0; i < optionTexts.length; i++) {
            if (quizRecord.triedSets.indexOf(String(i)) === -1) remaining.push(i);
        }
        if (remaining.length === 0) {
            for (var j = 0; j < optionTexts.length; j++) remaining.push(j);
        }
        var out = [];
        if (isMultiple) {
            for (var a = 0; a < remaining.length && out.length < _MAX_QUIZ_RETRY; a++) {
                for (var b = a + 1; b < remaining.length && out.length < _MAX_QUIZ_RETRY; b++) {
                    out.push([remaining[a], remaining[b]]);
                }
            }
            if (out.length < _MAX_QUIZ_RETRY) out.push(remaining.slice());
        } else {
            out.push([remaining[0]]);
        }
        return out;
    }

    // 辅助提交与清理函数
    var doSubmit = function (indexes) {
        quizRecord.pendingSet = indexes.slice();

        indexes.forEach(function (idx) {
            var label = optionNodes[idx];
            if (!label) return;
            label.style.fontWeight = 'bold';
            label.style.color = '#dc2626';
            if (localStorage.getItem('GPTJsSetting.goodStudent') !== 'true') {
                setTimeout(function () { label.click(); }, 100);
            }
        });

        if (localStorage.getItem('GPTJsSetting.goodStudent') === 'true') {
            logger('视频弹题答案已加粗，当前为好学生模式，请手动选择并提交', 'orange');
            container.removeAttribute('data-ne21-status');
            return;
        }

        setTimeout(function () {
            submitBtn.click();
            logger('视频弹题已提交，准备继续播放', 'green');
            setTimeout(function () {
                try {
                    var quiz = doc.querySelector('#video .ans-videoquiz, .ans-videoquiz');
                    if (quiz) {
                        var txt = quiz.innerText || '';
                        if (txt.indexOf('恭喜你，答对了！') !== -1 || txt.indexOf('继续学习') !== -1) {
                            // 答对了，模拟点击继续学习并强行删除
                            var btn = Array.prototype.slice.call(quiz.querySelectorAll('a, button, span, div')).find(function (el) {
                                var t = (el.innerText || el.textContent || '').trim();
                                return t === '继续学习' || t.indexOf('继续') !== -1;
                            });
                            if (btn) {
                                try { btn.click(); } catch { /* 忽略 */ }
                            }
                            setTimeout(function () {
                                if (quiz && quiz.parentNode) quiz.parentNode.removeChild(quiz);
                                Array.prototype.forEach.call(doc.querySelectorAll('.x-component-default'), function (node) {
                                    node.style.display = 'none';
                                });
                                if (media && media.paused && localStorage.getItem('GPTJsSetting.isPaused') !== 'true') media.play();
                            }, 800);
                        } else {
                            // 弹窗依旧存在且没答对，说明答错了，清除状态允许下个周期重试
                            quiz.removeAttribute('data-ne21-status');
                            container.removeAttribute('data-ne21-status');
                        }
                    } else {
                        // 弹窗消失，答对或已关闭
                        Array.prototype.forEach.call(doc.querySelectorAll('.x-component-default'), function (node) {
                            node.style.display = 'none';
                        });
                        if (media && media.paused && localStorage.getItem('GPTJsSetting.isPaused') !== 'true') media.play();
                    }
                } catch { /* empty */ }
            }, 1500);
        }, 600);
    };

    // 判断是走 AI 还是走“排除法重试”
    if (quizRecord.triedSets.length > 0) {
        var candidates = buildRetryCandidates();
        var nextIndexes = candidates.filter(function (set) {
            return quizRecord.triedSets.indexOf(set.slice().sort(function (a, b) { return a - b; }).join('+')) === -1;
        })[0] || candidates[0];
        logger('视频弹题上一组答案错误，排除后尝试: ' + nextIndexes.map(function (i) { return optionTexts[i]; }).join(','), 'orange');
        doSubmit(nextIndexes);
    } else {
        // 首次尝试，走 AI
        var prompt = buildPrompt({
            type: typeName,
            question: question,
            options: optionTexts,
            answer_format: isMultiple ? "用'|'分割多个答案，或回答选项字母" : (isJudge ? '只回答正确或错误，或回答选项字母' : '只回答一个选项字母或选项内容')
        });

        logger('检测到视频中题目，开始处理：' + (taskName || ''), 'purple');
        getAnswer(isMultiple ? 1 : (isJudge ? 3 : 0), prompt).then(function (answer) {
            quizRecord.errorCount = 0;
            var indexes;
            if (isJudge) {
                var parsed = parseJudgeAnswer(answer);
                if (parsed) {
                    indexes = [];
                    optionTexts.forEach(function (text, idx) {
                        var norm = normalizeChoiceText(text);
                        if (parsed === 'true' && /正确|对|是|true|√/i.test(norm)) indexes.push(idx);
                        if (parsed === 'false' && /错误|错|否|false|×/i.test(norm)) indexes.push(idx);
                    });
                }
            }
            if (!indexes || indexes.length === 0) {
                indexes = findVideoQuizMatchIndexes(optionTexts, answer, isMultiple);
            }

            if (indexes.length === 0) {
                logger('视频弹题未能匹配到选项，已暂停等待手动处理', 'red');
                container.removeAttribute('data-ne21-status');
                return;
            }

            doSubmit(indexes);
        }).catch(function (err) {
            if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                logger(ne21AnswerStopReason(err), 'red');
                container.removeAttribute('data-ne21-status');
                quizRecord.errorCount = 0;
                quizRecord.triedSets = [];
                return;
            }
            quizRecord.errorCount += 1;
            // 旧实现这里只清掉 processing 标记，下一周期又会重新调一次 AI。
            // 网络异常时会以 1.5s 为间隔无限调用云端答题，既烧积分/额度，
            // 视频也一直暂停着。连续失败 3 次后放弃本题，交给卡死检测跳下一个任务。
            if (quizRecord.errorCount >= 3) {
                logger('视频弹题 AI 连续多次失败（' + quizRecord.errorCount + ' 次），放弃本题: ' +
                    (err && err.message ? err.message : '网络异常'), 'red');
                container.removeAttribute('data-ne21-status');
                quizRecord.errorCount = 0;
                quizRecord.triedSets = [];
                return;
            }
            logger('视频弹题 AI 作答失败（' + quizRecord.errorCount + '/3），稍后重试: ' +
                (err && err.message ? err.message : '网络异常'), 'orange');
            container.removeAttribute('data-ne21-status');
        });
    }
}
function getRate() {
    var stored = localStorage.getItem('GPTJsSetting.rate');
    var n = stored !== null ? parseFloat(stored) : (setting.rate || 1);
    if (!isFinite(n) || n <= 0) n = 1;
    if (n > 16) n = 16;
    // 云控安全上限必须在这里再夹一次。
    // fetchCloudPolicy() 只会改 setting.rate，而本函数在用户动过面板滑块后
    // 优先读 localStorage 的 GPTJsSetting.rate —— 两者叠加的结果是：
    // 风控期云端把上限下调到 1.5×，只要该用户曾经调过倍速，就完全不起作用，
    // 而日志里还会打出"已将倍速安全限制在…"的提示，看起来一切正常。
    try {
        if (_cloudPolicy && _cloudPolicy.maxSafeRate && n > _cloudPolicy.maxSafeRate) {
            n = Number(_cloudPolicy.maxSafeRate);
        }
    } catch { /* 策略未就绪时不夹，沿用本地设置 */ }
    return n;
}

// 判断题答案的唯一归一入口：把 AI 的自然语言回答收敛成 'true' / 'false' / null。
// 全工程（matchJudgeOptionIndex、视频弹题、章节测验、考试）都必须走这里，
// 历史上各模块各写一份判定逻辑，漂移后出现过分歧。
//
// 修掉的两个缺陷：
//   1) 否定式被判成肯定。"不正确""不对""不是"里都含着"正确/对/是"，
//      而负向词（错误/错/否）一个都不匹配，于是先跑的正向包含匹配命中，
//      整句被当成 true —— 直接答错题。负向模式必须整批排在正向之前。
//      另外 "没错" 既是正意又含"错"字，需要高于一切负向词优先判定。
//   2) 拉丁单字母 't' / 'f' 与 "no" 被放进了包含匹配，任何含字母 t 的英文
//      回答都会被判成"正确"。单字母只做整串精确匹配。
//      中文单字同理：'是'/'对' 只做精确匹配，否则"是否""对比""反对"会被误伤。
function parseJudgeAnswer(agrs) {
    if (agrs === undefined || agrs === null) return null;
    var s = String(agrs).replace(/[。，.,!！?？、;；\s'"“”‘’（）()【】[\]]/g, '').toLowerCase();
    if (!s) return null;

    // 0) 最高优先："没错"是口语里的"正确"，却含"错"字，必须先于一切负向词
    if (s.indexOf('没错') !== -1) return 'true';

    // 1) 负向表述：否定式 + 直接的否定词
    if (/不正确|不完全正确|不对|不是|并非|不成立|没对|有误|反对|错误|答错|错了|false|wrong|×/.test(s)) return 'false';
    if (s === '否' || s === '错' || s === 'f' || s === 'no') return 'false';

    // 2) 正向表述：多字词/多字符词优先，单字只认整串
    if (/正确|对的|是的|成立|true|right|yes|√/.test(s)) return 'true';
    if (s === '是' || s === '对' || s === 't') return 'true';

    return null;
}

// 在选项列表中查找"正确/对"或"错误/错"对应的索引。
// 这里扫的是**选项文本**（本身就是"正确/错误"这类词），用单字是安全的；
// 与 parseJudgeAnswer 的单字策略不同（那边扫的是 AI 自由回答），两者不要互相"统一"。
function findJudgeOptionIndex(optionTexts, isTrue) {
    var trueWords = ['正确', '是', '对', '√', 'T', 'ri'];
    var falseWords = ['错误', '否', '错', '×', 'F', 'wr'];
    var words = isTrue ? trueWords : falseWords;
    for (var i = 0; i < optionTexts.length; i++) {
        var t = String(optionTexts[i] == null ? '' : optionTexts[i]);
        for (var j = 0; j < words.length; j++) {
            if (t.indexOf(words[j]) !== -1) return i;
        }
    }
    return -1;
}

// 查找填空题的所有空白输入项（按空顺序返回，支持普通 input 与富文本 UEditor，严格排除 hidden 与题目级配置字段）
function findFillBlankInputs($container) {
    if (!$container || $container.length === 0) return $();

    function cleanInputs($set) {
        if (!$set || $set.length === 0) return $();
        return $set.filter(function () {
            var t = (this.type || '').toLowerCase();
            if (t === 'hidden' || t === 'radio' || t === 'checkbox' || t === 'button' || t === 'submit') return false;
            var name = (this.name || '').toLowerCase();
            var id = (this.id || '').toLowerCase();
            if (/^(answertype|questionid)/.test(name) || /^(answertype|questionid)/.test(id)) return false;
            if (this.readOnly || this.disabled) return false;
            return true;
        });
    }

    // 1. 优先查找超星各空 UEditor 专用 textarea（最精准，每个空对应一个 answerEditor）
    var $editors = cleanInputs($container.find('textarea[name^="answerEditor"], textarea[id^="answerEditor"]'));
    if ($editors.length > 0) return $editors;

    // 2. 查找 .subEditor / .blankList2 / .eidtDiv / .textDIV 内的各空 textarea
    var $subEditors = cleanInputs($container.find('.subEditor textarea, .blankList2 textarea, .eidtDiv textarea, .textDIV textarea'));
    if ($subEditors.length > 0) return $subEditors;

    // 3. 移动端/特殊页面的外层容器包装（如 [data-editorindex] 或 .XztiHover1），逐个解包为内部输入元素
    var $boxes = $container.find('[data-editorindex]');
    if ($boxes.length === 0) $boxes = $container.find('.XztiHover1');
    if ($boxes.length > 0) {
        var innerInputs = [];
        $boxes.each(function () {
            var $inner = cleanInputs($(this).find('textarea, input[type="text"], input:not([type])'));
            if ($inner.length > 0) {
                innerInputs.push($inner[0]);
            } else {
                innerInputs.push(this);
            }
        });
        if (innerInputs.length > 0) return $(innerInputs);
    }

    // 4. 查找超星常见的填空 input 输入框集合
    var $inputs = cleanInputs($container.find('.blankList2 input, input.save_tk, input.stem_fill, input[type="text"][name^="answer"], input:not([type])[name^="answer"], .stem_answer input[type="text"], input[data-blank]'));
    if ($inputs.length > 0) return $inputs;

    // 5. 查找包含在 .stem_answer 或 .Answer 内的所有 text input
    var $stemInputs = cleanInputs($container.find('.stem_answer, .Answer, .Zy_ulTk, .ans-answer-container').find('input[type="text"], input:not([type]), textarea'));
    if ($stemInputs.length > 0) return $stemInputs;

    // 6. 查找容器内的所有有效 textarea
    var $textareas = cleanInputs($container.find('textarea'));
    if ($textareas.length > 0) return $textareas;

    // 7. 查找容器内的所有普通 input[type="text"]
    var $allInputs = cleanInputs($container.find('input[type="text"], input:not([type])').filter(':visible'));
    if ($allInputs.length > 0) return $allInputs;

    return $();
}

// 查找文本作答类题目（填空/简答/写作/翻译/名词解释/论述题/计算题等）的输入区域
// 严格对齐 main.js：优先查找 textarea[name^="answerEditor"] 与有效 textarea
function findAnswerTextareas($container) {
    if (!$container || $container.length === 0) return $();

    function cleanEle($set) {
        if (!$set || $set.length === 0) return $();
        return $set.filter(function () {
            var t = (this.type || '').toLowerCase();
            if (t === 'hidden' || t === 'radio' || t === 'checkbox' || t === 'button' || t === 'submit') return false;
            var name = (this.name || '').toLowerCase();
            var id = (this.id || '').toLowerCase();
            if (/^(answertype|questionid)/.test(name) || /^(answertype|questionid)/.test(id)) return false;
            if (this.readOnly || this.disabled) return false;
            return true;
        });
    }

    // 1) 优先查找超星各空 UEditor 专用 textarea（如 answerEditor108149811_0）
    var $editors = cleanEle($container.find('textarea[name^="answerEditor"], textarea[id^="answerEditor"]'));
    if ($editors.length > 0) return $editors;

    // 2) 查找各类题目作答区域包裹内的 textarea（完全对齐 main.js: .answerBg, .textDIV, .eidtDiv）
    var $wrapEles = cleanEle($container.find('.subEditor textarea, .blankList2 textarea, .Zy_ulTk textarea, .textDIV textarea, .eidtDiv textarea, .answerBg textarea, .Answer textarea, .stem_answer textarea'));
    if ($wrapEles.length > 0) return $wrapEles;

    // 3) 查找容器内所有有效 textarea（完全对齐 main.js: D(a.html).find("textarea")）
    var $allTextareas = cleanEle($container.find('textarea'));
    if ($allTextareas.length > 0) return $allTextareas;

    // 4) 普通 input 输入框（兼容纯 input 填空题）
    var $inputs = cleanEle($container.find('.blankList2 input, input.save_tk, input.stem_fill, input[type="text"][name^="answer"], input:not([type])[name^="answer"], input[data-blank]'));
    if ($inputs.length > 0) return $inputs;

    // 5) 兜底：所有可见 text input
    var $visibleInputs = cleanEle($container.find('input[type="text"], input:not([type])').filter(':visible'));
    if ($visibleInputs.length > 0) return $visibleInputs;

    return $();
}

// 统一解析题目类型，返回标准数字类型：
// 0: 单选题, 1: 多选题, 2: 填空题, 3: 判断题, 4: 简答/问答/主观题, 5: 写作题, 6: 翻译题, undefined: 未知
function resolveQuestionType($timu, customTitle) {
    var rawType = '';
    // 1. 优先检查超星 input[name^="answertype"] 隐藏域（完全对齐 main.js: type: "input[name^=answertype]:eq(0)"）
    if ($timu && $timu.length) {
        var cxType = $timu.find('input[name^="answertype"]:eq(0)').val();
        if (cxType != null && cxType !== '') {
            rawType = cxType;
        }
    }

    // 2. 检查 DOM 属性 typename / data-type
    if (!rawType && $timu && $timu.length) {
        rawType = $timu.attr('typename') || $timu.attr('data-type') || $timu.attr('type') || '';
    }

    // 3. 从题目标题文本中推断题型。
    //
    // ⚠️ 这里不能再 early return。旧实现一看到"写作/翻译"就 `return 5/6`，
    // 直接越过了步骤 1 已经从 input[name^="answertype"] 读到的权威类型 ——
    // 标题写"写作题"而隐藏域是 answertype=4（简答）时，结论会被标题覆盖。
    // 隐藏域是超星自己下发的，优先级必须最高，因此标题结论只作兜底。
    var titleType = null;
    var titleText = '';
    if (customTitle && typeof customTitle === 'string') {
        titleText = customTitle;
    } else if ($timu && $timu.length) {
        titleText = $timu.find('.Zy_TItle_sp, .Zy_TItle, .colorShallow, .Py-m1-title, .Cy_TItle, h3, h2, .stem_title').text() || $timu.text();
    }
    if (titleText) {
        var m = titleText.match(/[(（[【]\s*(单选题|单项选择题|单选|多选题|多项选择题|多选|填空题|填空|判断题|是非题|判断|简答题|简答|问答题|问答|名词解释|论述题|论述|计算题|计算|分录题|资料题|作图题|写作题|写作|作文题|作文|翻译题|翻译|英译汉|汉译英|阅读理解|完形填空|综合题)(?:[,\s，、].*?)?[)）\]】]/);
        var hit = m && m[1];
        if (!hit) {
            var m2 = titleText.match(/(?:^\s*\d+[.、\s]\s*|\b)(单选题|单项选择题|多选题|多项选择题|填空题|判断题|简答题|问答题|名词解释|论述题|计算题|分录题|资料题|作图题|写作题|作文题|翻译题|英译汉|汉译英)/);
            hit = m2 && m2[1];
        }
        if (hit) {
            if (/写作|作文/.test(hit)) titleType = 5;
            else if (/翻译|英译汉|汉译英/.test(hit)) titleType = 6;
            else if (!rawType) rawType = hit;
        }
    }

    // 4. 检查其他隐藏域中的类型字段
    if (!rawType && $timu && $timu.length) {
        var hiddenType = $timu.find('input[type="hidden"][name*="type"], input[type="hidden"][id*="type"]').val();
        if (hiddenType) rawType = hiddenType;
    }

    // 5. 字符串归一化映射（对齐 main.js typeConvert）
    if (rawType) {
        var t = String(rawType).trim();
        if (t === '0' || /^(单选|单选题|单项选择题|single)$/i.test(t)) return 0;
        if (t === '1' || /^(多选|多选题|多项选择题|multiple)$/i.test(t)) return 1;
        if (t === '2' || /^(填空|填空题|blank|fill)$/i.test(t)) return 2;
        if (t === '3' || /^(判断|判断题|是非题|judge)$/i.test(t)) return 3;
        if (/^(写作|写作题|作文|作文题)$/i.test(t) || (t === '5' && /写作|作文/.test(titleText))) return 5;
        if (/^(翻译|翻译题|英译汉|汉译英)$/i.test(t) || /翻译|英译汉|汉译英/.test(titleText)) return 6;
        if (t === '4' || t === '5' || t === '6' || t === '7' || t === '9' || /^(简答|简答题|问答|问答题|名词解释|论述|论述题|计算|计算题|分录题|资料题|作图题|其他|其它|阅读理解|阅读|阅读题|理解题|完形填空|完形|综合题|saq)$/i.test(t)) return 4;
    }

    // 5.5 走到这里说明 rawType 为空或无法归一化，才回落到标题推断（写作/翻译）。
    //     权威来源（answertype 隐藏域）永远优先于标题文案。
    if (titleType !== null) return titleType;

    // 6. DOM 结构特征兜底推断
    if ($timu && $timu.length) {
        // A. 填空题特征
        if ($timu.find('.blankList2, input.save_tk, input.stem_fill, [data-editorindex], textarea[name^="answerEditor"]').length > 0) {
            return 2;
        }
        // B. 单选/多选/判断题特征
        var hasRadios = $timu.find('input[type="radio"], .font-icon-radio, .choice-radio').length > 0;
        var hasCheckboxes = $timu.find('input[type="checkbox"], .font-icon-checkbox, .choice-checkbox').length > 0;
        var optionsCount = $timu.find('.Zy_ulTop li, .Zy_ulBottom li, .answer_p, .Cy_ulBottom li, .Cy_ulTop li, .Cy_ulTk li, .Cy_ulTop').length;
        if (hasCheckboxes) return 1;
        if (hasRadios) {
            if (optionsCount === 2 || /对|错|正确|错误/.test($timu.find('.answer_p, .Cy_ulBottom, .Zy_ulTop').text())) return 3;
            return 0;
        }
        if ($timu.find('.answer_p').length > 0 || optionsCount >= 2) {
            if (optionsCount === 2 && /对|错|正确|错误/.test($timu.find('.answer_p').text())) return 3;
            return 0;
        }
        // C. 填空题通用 input 兜底
        if ($timu.find('.stem_answer input[type="text"], input[name^="answer"]').length > 0) {
            return 2;
        }
        // D. 简答/主观题特征
        if ($timu.find('textarea, .subEditor, .edui-editor, [id^="edui"]').length > 0) {
            return 4;
        }
    }

    return undefined;
}

function getSafeTopDoc() {
    try {
        if (typeof unsafeWindow !== 'undefined' && unsafeWindow && unsafeWindow.top && unsafeWindow.top.document && unsafeWindow.top.document.body) {
            return unsafeWindow.top.document;
        }
    } catch { /* 忽略 */ }
    try {
        if (window.top && window.top.document && window.top.document.body) {
            return window.top.document;
        }
    } catch { /* 忽略 */ }
    return document;
}


function showBox() {
    if (!setting.showBox) return;
    var targetDoc = getSafeTopDoc();
    var existingNotice = null;
    try { existingNotice = targetDoc.querySelector('#ne-21notice') || document.querySelector('#ne-21notice'); } catch { /* 忽略 */ }
    if (existingNotice) return;

    var targetBody = targetDoc.body || document.body;
    if (!targetBody) {
        setTimeout(showBox, 150);
        return;
    }

    // 历史上的"功能开关"外壳，条件恒为真：else 分支是死代码（保留结构以便日后
    // 需要时把开关接回配置项）。这里只关掉这一行的恒定条件告警，避免它掩盖
    // 真正的逻辑问题，同时不做有风险的整块去壳（块内含大量模板字符串与 CSS 花括号）。
    // eslint-disable-next-line no-constant-condition
    if (true) {
        // 面板样式全部内联在本文件的 <style> 中（与旧 server/public/ui/panel.css 逐字节等价）。
        //
        // 历史实现会从 /api/ui/bundle 拉取 css/html 并写入 <style>.textContent，属于
        // 「远端内容注入」：既不符合脚本管理器商店审核对脚本自包含的要求，也意味着
        // 服务端一旦被入侵就能借 CSS 影响宿主页面（例如用属性选择器 + background:url()
        // 逐字符外泄数据）。该通道已移除，UI 与移除前完全一致。
        //
        // 云控能力全部保留在「纯数据」通道 /api/config/policy（见 fetchCloudPolicy）：
        // 仅含倍速上限、拟人延时基准、好学生模式开关与公告文本，一律按纯文本渲染。

        // 注入样式（仅一次）
        if (!top.document.getElementById('ne-21style')) {
            var styleEl = top.document.createElement('style');
            styleEl.id = 'ne-21style';
            styleEl.textContent = `
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            @keyframes ne21-in{from{opacity:0;transform:translateY(-8px) scale(.98)}to{opacity:1;transform:none}}
            #ne-21box.ne21-dragging{transition:none!important;cursor:move!important;user-select:none!important;}
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            #ne-21box #ne-21fab svg{width:38px;height:38px;display:block;margin:auto;pointer-events:none;transition:transform .35s cubic-bezier(0.34,1.56,0.64,1);}
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            #ne-21box.ne21-collapsed #ne-21fab{opacity:1;pointer-events:auto;transform:scale(1) rotate(0deg);transition:opacity .2s ease .1s,transform .25s cubic-bezier(0.16,1,0.3,1) .1s;}
            #ne-21box.ne21-collapsed:hover #ne-21fab svg{transform:rotate(30deg) scale(1.06);}
            #ne-21box .ne21-title{display:flex;align-items:center;gap:9px;font-weight:600;font-size:14px;letter-spacing:.3px;margin:0;color:inherit;}
            #ne-21box .ne21-dot{width:9px;height:9px;border-radius:50%;background:radial-gradient(circle at 32% 28%,rgba(255,255,255,.98),rgba(255,255,255,.5) 55%,rgba(15,23,42,.18) 100%);box-shadow:0 0 0 0 rgba(255,255,255,.7),inset 0 1px 1px rgba(255,255,255,.95);animation:ne21-pulse 2s infinite;flex-shrink:0;}
            @keyframes ne21-pulse{0%{box-shadow:0 0 0 0 rgba(255,255,255,.7),inset 0 1px 1px rgba(255,255,255,.95)}70%{box-shadow:0 0 0 8px rgba(255,255,255,0),inset 0 1px 1px rgba(255,255,255,.95)}100%{box-shadow:0 0 0 0 rgba(255,255,255,0),inset 0 1px 1px rgba(255,255,255,.95)}}
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            #ne-21box #ne-21close:hover, #ne-21box #ne-21pause:hover{background:rgba(255,255,255,.78);color:rgba(15,23,42,.92);box-shadow:0 0 0 1px rgba(15,23,42,.08),inset 0 1px 0 rgba(255,255,255,.9),0 1px 2px rgba(15,23,42,.1);}
            #ne-21box #ne-21close:active, #ne-21box #ne-21pause:active{transform:scale(.92);}
            #ne-21box .ne21-actions{display:flex;align-items:center;gap:8px;flex-shrink:0;}
            #ne-21box .ne21-kbd{display:inline-flex;align-items:center;gap:4px;padding:3px 8px;font-size:10.5px;font-weight:500;letter-spacing:.2px;color:rgba(15,23,42,.66);background:rgba(255,255,255,.55);border:1px solid rgba(255,255,255,.72);border-radius:8px;box-shadow:0 0 0 1px rgba(15,23,42,.06),inset 0 1px 0 rgba(255,255,255,.85),0 1px 2px rgba(15,23,42,.06);user-select:none;cursor:default;font-family:"SF Mono","Cascadia Code",Consolas,Menlo,monospace;line-height:1;white-space:nowrap;}
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            #ne-21box #ne-21notice{border-top:none!important;margin:0 0 6px!important;overflow:visible;}
            #ne-21box .ne21-uid{display:flex;align-items:center;gap:6px;color:rgba(15,23,42,.62);font-size:12px;margin-bottom:10px;padding:8px 12px;background:rgba(255,255,255,.5);border:1px solid rgba(255,255,255,.7);border-radius:12px;box-shadow:0 0 0 1px rgba(15,23,42,.05),inset 0 1px 0 rgba(255,255,255,.75),0 1px 2px rgba(15,23,42,.05);}
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            #ne-21box .ne21-row{display:flex;gap:8px;align-items:center;}
            #ne-21box .ne21-btn{display:inline-flex;align-items:center;justify-content:center;padding:7px 14px;font-size:12px;font-weight:500;border-radius:14px;cursor:pointer;border:1px solid rgba(255,255,255,.7);transition:transform .15s,box-shadow .2s,background .2s,color .2s;white-space:nowrap;}
            #ne-21box .ne21-btn-primary{color:rgba(15,23,42,.92);background:rgba(255,255,255,.72);box-shadow:0 0 0 1px rgba(15,23,42,.07),inset 0 1px 0 rgba(255,255,255,.95),inset 0 -6px 12px -6px rgba(15,23,42,.08),0 4px 10px -2px rgba(15,23,42,.22);}
            #ne-21box .ne21-btn-primary:hover{transform:translateY(-1px);background:rgba(255,255,255,.88);box-shadow:0 0 0 1px rgba(15,23,42,.09),inset 0 1px 0 rgba(255,255,255,1),inset 0 -6px 12px -6px rgba(15,23,42,.1),0 6px 14px -2px rgba(15,23,42,.28);}
            #ne-21box .ne21-btn-secondary{color:rgba(15,23,42,.78);background:rgba(255,255,255,.45);box-shadow:0 0 0 1px rgba(15,23,42,.06),inset 0 1px 0 rgba(255,255,255,.75),0 1px 2px rgba(15,23,42,.06);}
            #ne-21box .ne21-btn-secondary:hover{background:rgba(255,255,255,.65);color:rgba(15,23,42,.92);box-shadow:0 0 0 1px rgba(15,23,42,.08),inset 0 1px 0 rgba(255,255,255,.85),0 2px 4px rgba(15,23,42,.08);}
            #ne-21box .ne21-btn:active{transform:translateY(0) scale(.98);}
            #ne-21box .ne21-btn:disabled{opacity:.5;cursor:not-allowed;transform:none;}
            #ne-21box .ne21-select{padding:5px 8px;font-size:12px;border-radius:10px;border:1px solid rgba(255,255,255,.65);background:rgba(255,255,255,.5);color:rgba(15,23,42,.86);cursor:pointer;outline:none;min-width:80px;flex-shrink:0;box-shadow:0 0 0 1px rgba(15,23,42,.05),inset 0 1px 0 rgba(255,255,255,.75);transition:background .2s,box-shadow .2s;}
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            #ne-21box #moreSettings::-webkit-scrollbar-track{background:transparent;}
            #ne-21box #moreSettings::-webkit-scrollbar-thumb{background:rgba(15,23,42,.2);border-radius:4px;}
            #ne-21box #moreSettings::-webkit-scrollbar-thumb:hover{background:rgba(15,23,42,.32);}
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            #ne-21box #moreSettings input[type=checkbox]::before{content:'';position:absolute;top:1px;left:1px;width:16px;height:16px;border-radius:50%;background:linear-gradient(180deg,rgba(255,255,255,1),rgba(255,255,255,.85));box-shadow:0 1px 3px rgba(15,23,42,.25),inset 0 1px 0 rgba(255,255,255,1);transition:transform .25s cubic-bezier(.2,.9,.3,1);}
            #ne-21box #moreSettings input[type=checkbox]:hover{background:rgba(15,23,42,.24);}
            #ne-21box #moreSettings input[type=checkbox]:checked{background:rgba(255,255,255,.78);border-color:rgba(15,23,42,.1);box-shadow:inset 0 1px 0 rgba(255,255,255,.95),inset 0 -2px 4px rgba(15,23,42,.08),0 0 0 1px rgba(15,23,42,.06);}
            #ne-21box #moreSettings input[type=checkbox]:checked:hover{background:rgba(255,255,255,.92);}
            #ne-21box #moreSettings input[type=checkbox]:checked::before{transform:translateX(14px);}
            #ne-21box #moreSettings p{display:none;}
            #ne-21box #ne-21thinking{display:none!important;}
            @keyframes ne21-spin{to{transform:rotate(360deg)}}
            @keyframes ne21-dot{0%,80%,100%{transform:scale(.5);opacity:.4}40%{transform:scale(1);opacity:1}}
            #ne-21box #ne-21log .ne21-log-spinner{display:inline-block;width:9px;height:9px;margin-right:5px;border:1.5px solid rgba(15,23,42,.18);border-top-color:rgba(15,23,42,.7);border-radius:50%;vertical-align:-1px;animation:ne21-spin .8s linear infinite;}
            #ne-21box #ne-21log .ne21-log-dots{display:inline-flex;gap:2px;margin-left:3px;vertical-align:1px;}
            #ne-21box #ne-21log .ne21-log-dots i{width:3px;height:3px;border-radius:50%;background:currentColor;opacity:.65;animation:ne21-dot 1.2s infinite ease-in-out both;}
            #ne-21box #ne-21log .ne21-log-dots i:nth-child(2){animation-delay:.16s;}
            #ne-21box #ne-21log .ne21-log-dots i:nth-child(3){animation-delay:.32s;}
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            #ne-21box #ne-21log:empty{display:none;}
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            #ne-21box #ne-21log::-webkit-scrollbar-thumb{background:rgba(15,23,42,.2);border-radius:4px;}
            #ne-21box #ne-21log::-webkit-scrollbar-thumb:hover{background:rgba(15,23,42,.32);}
            #ne-21box #ne-21log p{margin:0;padding:2px 0;word-break:break-all;}
            #ne-21box #ne-21log hr{display:none;}
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            #ne-21box .ne21-setting-group{margin:8px 0 10px;padding:8px 0 6px;border-top:1px dashed rgba(15,23,42,.12);border-bottom:1px dashed rgba(15,23,42,.12);}
            #ne-21box .ne21-setting-title{font-size:11px;font-weight:600;color:rgba(15,23,42,.5);text-transform:uppercase;letter-spacing:.4px;margin:2px 0 8px;}
            #ne-21box .ne21-input-row{display:flex;flex-direction:column;gap:3px;margin-bottom:8px;}
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            #ne-21box .ne21-btn-spinner{display:inline-block;width:9px;height:9px;margin-right:4px;border:1.5px solid rgba(15,23,42,.25);border-top-color:rgba(15,23,42,.85);border-radius:50%;vertical-align:-1px;animation:ne21-spin .8s linear infinite;}
            #ne-21box select.ne21-input option{background:#ffffff;color:#0f172a;}
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            #ne-21box .ne21-input:focus{background:rgba(255,255,255,.8);box-shadow:0 0 0 1px rgba(15,23,42,.08),inset 0 1px 0 rgba(255,255,255,.85),0 0 0 3px rgba(15,23,42,.08);}

            /* === 设置按钮物理高弹回弹动效与激活样式 === */
            @keyframes ne21-spring-bounce {
                0% { transform: scale(1); }
                30% { transform: scale(0.84); }
                65% { transform: scale(1.14); }
                85% { transform: scale(0.96); }
                100% { transform: scale(1); }
            }
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                animation: ne21-spring-bounce 0.36s cubic-bezier(0.34, 1.56, 0.64, 1) both !important;
            }
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                transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s;
                user-select: none;
                outline: none;
            }
            #ne-21box #moreSettingsBtn:active, #ne-21box #ne21RefreshPointsBtn:active {
                transform: scale(0.86);
            }
            #ne-21box #moreSettingsBtn.ne21-btn-active {
                background: rgba(0, 113, 227, 0.12) !important;
                color: #0071e3 !important;
                font-weight: 600;
                border-color: rgba(0, 113, 227, 0.35) !important;
                box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.12) !important;
            }
            `;
            (targetDoc.head || document.head || targetBody).appendChild(styleEl);
        }
        var isCollapsedInit = localStorage.getItem('GPTJsSetting.boxCollapsed') === 'true';
        var box_html = `
            <div id="ne-21box" class="ne21-no-transition${isCollapsedInit ? ' ne21-collapsed' : ''}">
                <div id="ne-21fab" title="点击展开 OpenAI 学习通助手">
                    <svg viewBox="0 0 256 256" width="38" height="38" fill="currentColor" style="display:block;"><g transform="translate(0,256) scale(0.1,-0.1)" stroke="none"><path d="M1015 2544 c-38 -8 -108 -34 -155 -56 -118 -57 -229 -167 -289 -288 l-42 -85 -72 -25 c-105 -37 -162 -74 -248 -159 -161 -161 -224 -389 -169 -607 24 -92 58 -167 107 -231 l35 -46 -13 -61 c-17 -76 -17 -214 0 -286 18 -78 82 -206 133 -267 135 -161 311 -238 529 -231 l105 3 55 -48 c62 -55 187 -120 274 -142 76 -19 222 -19 305 1 116 27 205 79 300 174 70 69 94 102 128 172 38 77 46 87 75 93 17 4 68 24 112 45 358 171 472 647 231 963 l-36 47 15 57 c19 74 19 210 -1 293 -71 305 -362 517 -677 495 l-88 -6 -51 46 c-146 131 -373 191 -563 149z m281 -179 c49 -16 154 -74 154 -85 0 -3 -114 -70 -252 -150 -139 -80 -265 -156 -280 -168 l-28 -24 0 -374 c0 -206 -2 -374 -4 -374 -2 0 -52 27 -110 61 l-106 61 0 327 c0 261 3 339 15 386 45 172 181 306 353 350 69 18 188 13 258 -10z m626 -205 c87 -33 172 -94 222 -161 64 -86 88 -154 94 -271 2 -54 2 -98 -1 -98 -2 0 -124 70 -270 155 -186 109 -275 155 -296 155 -22 0 -123 -54 -342 -180 -172 -99 -314 -180 -316 -180 -1 0 -3 56 -3 124 l0 124 278 160 c243 141 314 175 397 196 45 11 182 -2 237 -24z m-1422 -539 c0 -188 4 -309 11 -329 9 -27 50 -54 329 -214 176 -101 319 -185 319 -188 1 -6 -188 -113 -207 -118 -7 -2 -139 70 -294 159 -212 123 -294 175 -332 215 -220 222 -161 605 114 749 25 13 48 24 53 25 4 0 7 -134 7 -299z m1402 7 c316 -183 363 -220 421 -336 70 -141 71 -287 2 -428 -39 -80 -130 -173 -206 -211 l-44 -22 -5 312 c-3 212 -9 318 -17 332 -6 11 -147 98 -312 194 -166 95 -308 179 -318 186 -14 10 -2 20 88 73 57 34 105 62 107 62 2 0 130 -73 284 -162z m-475 -114 l133 -76 -2 -162 -3 -161 -136 -78 -136 -78 -136 78 -137 78 2 164 3 163 125 73 c69 40 132 74 140 74 8 1 74 -33 147 -75z m380 -220 l95 -56 -4 -341 c-4 -320 -6 -346 -26 -401 -29 -78 -72 -144 -130 -198 -103 -97 -203 -132 -351 -126 -83 3 -106 8 -168 37 -83 38 -111 63 -91 78 7 5 128 76 269 156 185 107 259 154 267 173 9 17 12 134 12 386 0 329 1 360 16 354 9 -4 59 -31 111 -62z m-264 -572 c-37 -27 -521 -302 -568 -323 -75 -33 -221 -38 -311 -11 -176 54 -306 204 -335 389 -10 60 -7 143 6 143 2 0 124 -70 272 -155 149 -85 278 -155 289 -155 16 0 394 211 614 343 l45 27 3 -123 c2 -107 1 -123 -15 -135z"/></g></svg>
                </div>
                <div class="ne21-header" title="可按住任意边缘拖动 / 按 F9 显示或隐藏面板 / 点击右侧按钮最小化">
                    <h3 class="ne21-title"><span class="ne21-dot"></span>OpenAI 学习通助手</h3>
                    <div class="ne21-actions">
                        <span class="ne21-kbd" title="按 F9 可显示/隐藏整个面板">F9 <b>显隐</b></span>
                        <button id="ne-21pause" type="button" aria-label="暂停/继续" style="margin-right:4px;"><svg width="10" height="10" viewBox="0 0 24 24" fill="currentColor"><path d="M6 4h4v16H6zm8 0h4v16h-4z"/></svg></button>
                        <button id="ne-21close" type="button" aria-label="最小化" title="最小化为悬浮按钮"><svg width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="3" stroke-linecap="round"><path d="M5 12h14"/></svg></button>
                    </div>
                </div>
                <div class="ne21-body">
                    <div id="ne-21notice"></div>
                    <div id="userInfo"></div>
                    <div id="moreSettings" style="display:none;">
                        <label title="倍速过高可能导致异常"><select id="GPTJsSetting.rate" class="ne21-select"><option value="1">1×</option><option value="1.5">1.5×</option><option value="2">2×</option><option value="3">3×</option><option value="4">4×</option><option value="6">6×</option><option value="8">8×</option><option value="16">16×</option></select>视频/音频倍速</label>
                        <label title="题目作答间隔与 AI 搜题节流间隔（秒），默认 2.5 秒">
                            <input type="number" id="GPTJsSetting.time" class="ne21-select" min="0" max="60" step="0.5" style="min-width:56px;width:56px;padding:5px 8px;">答题间隔 (秒)
                        </label>
                        <p></p>
                        <label title="开启后根据正态分布随机波动答题延时，真实模拟人类节奏"><input type="checkbox" id="GPTJsSetting.humanJitter">拟人化波动延时 (防风控)</label>
                        <label title="开启后根据题干字数动态计算拟人化思考与阅读时间，并在思考期间模拟自然微动作"><input type="checkbox" id="GPTJsSetting.thinkingPause">拟人化答题停顿 (防秒答风控)</label>
                        <div class="ne21-slider-row" style="margin:4px 0 6px;padding:8px 2px 4px;border-top:1px dashed rgba(15,23,42,.1);">
                            <div style="display:flex;align-items:center;justify-content:space-between;font-size:12px;color:rgba(15,23,42,.78);margin-bottom:6px;">
                                <span title="设置测验期望正确率（50%~100%）。若低于100%，将智能挑选干扰项故意选错，模拟自然错题避开全满分风控">期望正确率 (防满分风控)</span>
                                <b id="ne21TargetAccuracyVal" style="color:#0284c7;font-weight:700;">90%</b>
                            </div>
                            <input type="range" id="GPTJsSetting.targetAccuracy" min="50" max="100" step="5" value="90" style="width:100%;height:4px;margin:0;accent-color:#0284c7;cursor:pointer;">
                        </div>
                        <label title="同一道题在本地离线缓存答案，重做或复习免消耗 Token"><input type="checkbox" id="GPTJsSetting.localCache">离线题目缓存 (秒答免Token)</label>
                        <label title="遇到图片/Canvas题干时提取图像并调用多模态模型作答"><input type="checkbox" id="GPTJsSetting.visionMode">多模态识图答题 (公式/图表)</label>
                        <p></p>
                        <label title="开启：测验作答完成后自动点击【提交】并确认；关闭：自动点击【暂时保存】"><input type="checkbox" id="GPTJsSetting.sub">测验自动提交 (未勾选则暂存)</label>
                        <label><input type="checkbox" id="GPTJsSetting.force">测验强制提交</label>
                        <label><input type="checkbox" id="GPTJsSetting.examTurn">考试自动跳转</label>
                        <label><input type="checkbox" id="GPTJsSetting.goodStudent">答案加粗不选择</label>
                        <p></p>
                        <label><input type="checkbox" id="GPTJsSetting.redo">重做模式 (不跳过已答题)</label>
                    </div>
                    <div id="ne-21thinking">
                        <div class="ne21-thinking-spinner"></div>
                        <span class="ne21-thinking-text">AI 思考中<span class="ne21-thinking-dots"><i></i><i></i><i></i></span></span>
                    </div>
                    <div id="ne-21log"></div>
                </div>
            </div>
        `;
        $(box_html).appendTo(targetBody);

        var targetWin = targetDoc.defaultView || window;
        var $box = $('#ne-21box', targetDoc);

        // 恢复保存的位置与收起/展开状态
        (function () {
            var isCollapsed = localStorage.getItem('GPTJsSetting.boxCollapsed') === 'true';
            if (isCollapsed) {
                $box.addClass('ne21-collapsed');
            }
            // 恢复位置
            try {
                var savedPos = localStorage.getItem('GPTJsSetting.boxPosition');
                if (savedPos) {
                    var pos = JSON.parse(savedPos);
                    if (pos && typeof pos.left === 'number' && typeof pos.top === 'number') {
                        var vw = targetWin.innerWidth || window.innerWidth, vh = targetWin.innerHeight || window.innerHeight;
                        var w = isCollapsed ? 48 : 340;
                        var h = isCollapsed ? 48 : 220;
                        // 约束：确保恢复后完整位于视窗内，保留 8px 安全边距
                        var nx = Math.max(8, Math.min(pos.left, Math.max(8, vw - w - 8)));
                        var ny = Math.max(8, Math.min(pos.top, Math.max(8, vh - h - 8)));
                        $box.css({ left: nx + 'px', top: ny + 'px', right: 'auto', bottom: 'auto' });
                    }
                }
            } catch { /* empty */ }
            // 恢复整面板显隐状态（F9 切换）
            if (localStorage.getItem('GPTJsSetting.showBox') === 'hide') {
                $box.css('display', 'none');
            }
            setTimeout(function () {
                $box.removeClass('ne21-no-transition');
            }, 60);
        })();

        // 暂停/继续按钮状态同步器（支持跨 iframe 与所有挂载文档实时同步）
        function syncPauseButtonUI(isPaused) {
            if (typeof isPaused === 'undefined') {
                isPaused = localStorage.getItem('GPTJsSetting.isPaused') === 'true';
            }
            var docs = [];
            try {
                if (typeof getAllAccessibleDocuments === 'function') {
                    docs = getAllAccessibleDocuments();
                }
            } catch { /* 忽略 */ }
            if (docs.indexOf(targetDoc) === -1) docs.push(targetDoc);
            if (docs.indexOf(document) === -1) docs.push(document);
            try { if (window.top && docs.indexOf(window.top.document) === -1) docs.push(window.top.document); } catch { /* 忽略 */ }

            for (var i = 0; i < docs.length; i++) {
                try {
                    var btns = docs[i].querySelectorAll('#ne-21pause');
                    for (var b = 0; b < btns.length; b++) {
                        var btn = btns[b];
                        btn.innerHTML = isPaused
                            ? '<svg width="10" height="10" viewBox="0 0 24 24" fill="currentColor" style="margin-left:1px"><path d="M7 4v16l13-8z"/></svg>'
                            : '<svg width="10" height="10" viewBox="0 0 24 24" fill="currentColor"><path d="M6 4h4v16H6zm8 0h4v16h-4z"/></svg>';
                        btn.setAttribute('title', isPaused ? '已暂停，点击继续' : '运行中，点击暂停');
                    }
                } catch { /* 忽略 */ }
            }
        }
        try {
            window.syncPauseButtonUI = syncPauseButtonUI;
            if (window.top) window.top.syncPauseButtonUI = syncPauseButtonUI;
        } catch { /* 忽略 */ }

        // 暂停/继续按钮逻辑
        $box.on('pointerdown mousedown', '#ne-21pause', function (e) {
            e.stopPropagation();
        }).on('click', '#ne-21pause', function (e) {
            e.stopPropagation();
            var isPaused = localStorage.getItem('GPTJsSetting.isPaused') === 'true';
            isPaused = !isPaused;
            localStorage.setItem('GPTJsSetting.isPaused', isPaused);
            if (!isPaused) {
                try {
                    if (typeof window.clearCaptchaBlocked === 'function') window.clearCaptchaBlocked();
                    else if (window.top && typeof window.top.clearCaptchaBlocked === 'function') window.top.clearCaptchaBlocked();
                } catch { /* 忽略 */ }
            }
            syncPauseButtonUI(isPaused);
            if (isPaused) {
                try { logger('脚本已暂停运行', 'orange'); } catch { /* 忽略 */ }
            } else {
                try { logger('脚本已恢复运行', 'green'); } catch { /* 忽略 */ }
            }
        });

        // 恢复暂停状态并同步初始 UI
        (function () {
            try {
                if (typeof checkChaoxingCaptcha === 'function') {
                    checkChaoxingCaptcha();
                }
            } catch { /* 忽略 */ }
            syncPauseButtonUI();
        })();

        // 点击最小化按钮：收起为悬浮球
        $box.on('pointerdown mousedown', '#ne-21close', function (e) {
            e.stopPropagation(); // 避免触发拖拽
        }).on('click', '#ne-21close', function (e) {
            e.stopPropagation();
            if ($box.hasClass('ne21-collapsed')) return;

            var curH = $box.outerHeight();
            var curW = $box.outerWidth() || 340;
            $box.data('expanded-height', curH);

            var rect = $box[0].getBoundingClientRect();
            var vw = targetWin.innerWidth || window.innerWidth, vh = targetWin.innerHeight || window.innerHeight;
            var isRightSide = (rect.left + curW / 2) > (vw / 2);

            // 智能计算收起后的悬浮球位置：贴近用户刚刚点击的右上角/左上角锚点，零位移跳跃
            var targetLeft = isRightSide ? (rect.right - 48) : rect.left;
            var targetTop = rect.top;
            targetLeft = Math.max(8, Math.min(targetLeft, Math.max(8, vw - 48 - 8)));
            targetTop = Math.max(8, Math.min(targetTop, Math.max(8, vh - 48 - 8)));

            // 先锁死当前高度和宽度，确保从当前尺寸平滑过渡到 48px
            $box.css({ width: curW + 'px', height: curH + 'px' });
            $box[0].offsetHeight; // 强制 reflow

            $box.addClass('ne21-collapsed').css({
                left: targetLeft + 'px',
                top: targetTop + 'px',
                right: 'auto',
                bottom: 'auto',
                width: '',
                height: ''
            });

            try {
                localStorage.setItem('GPTJsSetting.boxCollapsed', 'true');
                localStorage.setItem('GPTJsSetting.boxPosition', JSON.stringify({ left: targetLeft, top: targetTop }));
            } catch { /* empty */ }
        });

        // 浮窗自由拖拽与悬浮球点击展开
        (function () {
            var dragging = false, startX = 0, startY = 0, startLeft = 0, startTop = 0;
            var fabMoved = false;

            var nonDraggableSelector = 'input, select, textarea, button, a, label, #moreSettings, #ne-21log, .ne21-slider-row, option';

            function enableDragMask() {
                var mask = targetDoc.getElementById('ne21-drag-mask');
                if (!mask) {
                    mask = targetDoc.createElement('div');
                    mask.id = 'ne21-drag-mask';
                    mask.style.cssText = 'position:fixed!important;top:0!important;left:0!important;width:100vw!important;height:100vh!important;z-index:99998!important;cursor:move!important;background:transparent!important;touch-action:none!important;user-select:none!important;-webkit-user-select:none!important;pointer-events:auto!important;';
                    (targetDoc.body || targetBody).appendChild(mask);
                }
                var iframes = targetDoc.querySelectorAll('iframe');
                for (var i = 0; i < iframes.length; i++) {
                    if (!iframes[i].hasAttribute('data-ne21-pe')) {
                        iframes[i].setAttribute('data-ne21-pe', iframes[i].style.pointerEvents || '');
                        iframes[i].style.pointerEvents = 'none';
                    }
                }
            }

            function disableDragMask() {
                var mask = targetDoc.getElementById('ne21-drag-mask');
                if (mask && mask.parentNode) {
                    mask.parentNode.removeChild(mask);
                }
                var iframes = targetDoc.querySelectorAll('iframe[data-ne21-pe]');
                for (var i = 0; i < iframes.length; i++) {
                    var prev = iframes[i].getAttribute('data-ne21-pe');
                    iframes[i].style.pointerEvents = prev || '';
                    iframes[i].removeAttribute('data-ne21-pe');
                }
            }

            function startDrag(e) {
                dragging = true;
                var rect = $box[0].getBoundingClientRect();
                startX = e.clientX;
                startY = e.clientY;
                startLeft = rect.left;
                startTop = rect.top;
                $box.addClass('ne21-dragging');
                $box.css({ left: startLeft + 'px', top: startTop + 'px', right: 'auto', bottom: 'auto' });
                $(targetBody).css('user-select', 'none');
                enableDragMask();

                if (e.target && e.target.setPointerCapture && e.pointerId != null) {
                    try { e.target.setPointerCapture(e.pointerId); } catch { /* 忽略 */ }
                }
                e.preventDefault();
            }

            function onDragMove(e) {
                if (!dragging) return;
                var dx = e.clientX - startX;
                var dy = e.clientY - startY;
                if (Math.abs(dx) > 3 || Math.abs(dy) > 3) {
                    fabMoved = true;
                }
                var nx = startLeft + dx;
                var ny = startTop + dy;
                var isCollapsed = $box.hasClass('ne21-collapsed');
                var w = isCollapsed ? 48 : ($box.outerWidth() || 340);
                var h = isCollapsed ? 48 : ($box.outerHeight() || 300);
                var vw = targetWin.innerWidth || window.innerWidth;
                var vh = targetWin.innerHeight || window.innerHeight;

                // 自由拖拽全屏幕任意位置，保留 8px 安全间距避免超出屏幕
                nx = Math.max(8, Math.min(nx, Math.max(8, vw - w - 8)));
                ny = Math.max(8, Math.min(ny, Math.max(8, vh - h - 8)));
                $box.css({ left: nx + 'px', top: ny + 'px' });
            }

            function onDragEnd(e) {
                if (!dragging) return;
                dragging = false;
                $box.removeClass('ne21-dragging');
                $(targetBody).css('user-select', '');
                disableDragMask();

                if (e && e.target && e.target.releasePointerCapture && e.pointerId != null) {
                    try { e.target.releasePointerCapture(e.pointerId); } catch { /* 忽略 */ }
                }

                try {
                    var rect = $box[0].getBoundingClientRect();
                    localStorage.setItem('GPTJsSetting.boxPosition', JSON.stringify({ left: rect.left, top: rect.top }));
                } catch { /* empty */ }
            }

            // 监听拖拽触发：收起时点击球体任意位置，展开时点击除表单按钮外的区域
            $box.on('pointerdown mousedown', function (e) {
                if (e.which !== 1 && e.button !== 0 && e.pointerType === 'mouse') return;
                if ($box.hasClass('ne21-collapsed')) {
                    fabMoved = false;
                    startDrag(e);
                    return;
                }
                if ($(e.target).closest(nonDraggableSelector).length) return;
                startDrag(e);
            });

            // 悬浮球点击恢复展开（未发生明显拖拽时触发）
            $box.on('click', function (e) {
                if (!$box.hasClass('ne21-collapsed')) return;
                if (fabMoved) return; // 刚才拖拽移动过，不展开发生位移的悬浮球
                e.stopPropagation();

                var rect = $box[0].getBoundingClientRect();
                var vw = targetWin.innerWidth || window.innerWidth, vh = targetWin.innerHeight || window.innerHeight;
                var targetW = 340;
                var targetH = $box.data('expanded-height') || 360;

                var isRightSide = (rect.left + 24) > (vw / 2);
                var targetLeft = isRightSide ? (rect.right - targetW) : rect.left;
                var targetTop = rect.top;

                targetLeft = Math.max(8, Math.min(targetLeft, Math.max(8, vw - targetW - 8)));
                targetTop = Math.max(8, Math.min(targetTop, Math.max(8, vh - targetH - 8)));

                // 从 48px 平滑绽放过渡至目标面板尺寸
                $box.css({ width: '48px', height: '48px' });
                $box[0].offsetHeight; // 强制 reflow

                $box.removeClass('ne21-collapsed').css({
                    left: targetLeft + 'px',
                    top: targetTop + 'px',
                    right: 'auto',
                    bottom: 'auto',
                    width: targetW + 'px',
                    height: targetH + 'px'
                });

                try {
                    localStorage.setItem('GPTJsSetting.boxCollapsed', 'false');
                    localStorage.setItem('GPTJsSetting.boxPosition', JSON.stringify({ left: targetLeft, top: targetTop }));
                } catch { /* empty */ }

                clearTimeout($box.data('expandTimer'));
                var timer = setTimeout(function () {
                    if (!$box.hasClass('ne21-collapsed')) {
                        $box.css({ height: '', width: '' });
                    }
                }, 340);
                $box.data('expandTimer', timer);
            });

            // 全局移动与释放监听器：跨所有相关文档与窗口注册
            var $dragTargets = $(targetDoc).add(document).add(targetWin).add(window);
            $dragTargets.on('pointermove.ne21drag mousemove.ne21drag touchmove.ne21drag', onDragMove);
            $dragTargets.on('pointerup.ne21drag mouseup.ne21drag touchend.ne21drag pointercancel.ne21drag', onDragEnd);
            $(targetWin).add(window).on('blur.ne21drag', onDragEnd);

            // 视窗大小变动自适应
            $(targetWin).add(window).on('resize.ne21pos', function () {
                var rect = $box[0].getBoundingClientRect();
                var vw = targetWin.innerWidth || window.innerWidth, vh = targetWin.innerHeight || window.innerHeight;
                var w = $box.outerWidth() || 48, h = $box.outerHeight() || 48;
                var nx = Math.max(8, Math.min(rect.left, Math.max(8, vw - w - 8)));
                var ny = Math.max(8, Math.min(rect.top, Math.max(8, vh - h - 8)));
                if (nx !== rect.left || ny !== rect.top) {
                    $box.css({ left: nx + 'px', top: ny + 'px', right: 'auto', bottom: 'auto' });
                    try {
                        localStorage.setItem('GPTJsSetting.boxPosition', JSON.stringify({ left: nx, top: ny }));
                    } catch { /* empty */ }
                }
            });
        })();

        // 设置面板切换 + 输入框/复选框监听器
        (function () {
            var moreSettings = targetDoc.getElementById('moreSettings');
            var userInfo = targetDoc.getElementById('userInfo');
            if (!moreSettings || !userInfo) return;

            var isSettingsVisible = false;
            $box.off('click', '#moreSettingsBtn').on('click', '#moreSettingsBtn', function (e) {
                e.stopPropagation();
                var btn = this;
                var $btn = $(btn);

                // 触发物理弹性震颤动画
                $btn.removeClass('ne21-btn-bounce');
                void btn.offsetWidth; // 触发 reflow 重启关键帧
                $btn.addClass('ne21-btn-bounce');

                isSettingsVisible = !isSettingsVisible;
                if (moreSettings) {
                    if (isSettingsVisible) {
                        $(moreSettings).stop(true, true).slideDown(240);
                    } else {
                        $(moreSettings).stop(true, true).slideUp(180);
                    }
                }
                $btn.toggleClass('ne21-btn-active', isSettingsVisible);
                $btn.text(isSettingsVisible ? '收起' : '设置');
            });

            // 默认开关初始化
            ['fuzzyMatch', 'sub', 'humanJitter', 'thinkingPause', 'localCache', 'visionMode'].forEach(function (key) {
                if (localStorage.getItem('GPTJsSetting.' + key) === null) {
                    localStorage.setItem('GPTJsSetting.' + key, 'true');
                }
            });
            if (localStorage.getItem('GPTJsSetting.targetAccuracy') === null) {
                localStorage.setItem('GPTJsSetting.targetAccuracy', '90');
            }

            ['sub', 'force', 'examTurn', 'goodStudent', 'redo', 'fuzzyMatch', 'humanJitter', 'thinkingPause', 'localCache', 'visionMode'].forEach(function (settingId) {
                var checkbox = targetDoc.getElementById('GPTJsSetting.' + settingId);
                if (!checkbox) return;
                checkbox.addEventListener('change', updateLocalStorage);
                checkbox.checked = localStorage.getItem('GPTJsSetting.' + settingId) === 'true';
            });

            var serverUrlInput = targetDoc.getElementById('GPTJsSetting.serverUrl');
            if (serverUrlInput) {
                serverUrlInput.value = localStorage.getItem('GPTJsSetting.serverUrl') || setting.serverUrl || 'https://xuexitong.icollege.top';
                serverUrlInput.addEventListener('input', updateLocalStorage);
            }

            // 期望正确率滑块
            var accRange = targetDoc.getElementById("GPTJsSetting.targetAccuracy");
            var accValText = targetDoc.getElementById("ne21TargetAccuracyVal");
            if (accRange) {
                var savedAcc = localStorage.getItem("GPTJsSetting.targetAccuracy");
                var accVal = (savedAcc !== null && isFinite(parseInt(savedAcc, 10))) ? parseInt(savedAcc, 10) : (setting.targetAccuracy || 90);
                accRange.value = String(accVal);
                if (accValText) accValText.textContent = accVal + "%";
                accRange.addEventListener("input", function () {
                    var v = parseInt(accRange.value, 10);
                    if (!isFinite(v) || v < 50) v = 50;
                    if (v > 100) v = 100;
                    if (accValText) accValText.textContent = v + "%";
                    localStorage.setItem("GPTJsSetting.targetAccuracy", String(v));
                    setting.targetAccuracy = v;
                });
            }

            // 倍速下拉：恢复上次选择并持久化
            var rateSelect = targetDoc.getElementById('GPTJsSetting.rate');
            if (rateSelect) {
                rateSelect.value = localStorage.getItem('GPTJsSetting.rate') || '1';
                rateSelect.addEventListener('change', function () {
                    localStorage.setItem('GPTJsSetting.rate', rateSelect.value);
                });
            }
            // 时间间隔输入框：恢复上次值并持久化（范围 0~60 秒，对应毫秒）
            var timeInput = targetDoc.getElementById('GPTJsSetting.time');
            if (timeInput) {
                var savedTime = localStorage.getItem('GPTJsSetting.time');
                timeInput.value = (savedTime !== null && isFinite(parseFloat(savedTime)))
                    ? savedTime
                    : String((setting.time || 2500) / 1000);
                timeInput.addEventListener('change', function () {
                    var v = parseFloat(timeInput.value);
                    if (!isFinite(v) || v < 0) v = 0;
                    if (v > 60) v = 60;
                    timeInput.value = String(v);
                    localStorage.setItem('GPTJsSetting.time', String(v));
                    setting.time = v * 1000;
                });
            }
        })();
    }


    var studentUid = getStudentUid();
    var sUrl = getSafeServerUrl();

    $box.find('#ne-21notice').html(`
        <div id="ne21UpdateBanner" style="display:none;align-items:center;justify-content:space-between;margin:0 0 8px;padding:6px 10px;background:linear-gradient(135deg,rgba(0,113,227,.12),rgba(56,189,248,.12));border:1px solid rgba(0,113,227,.28);border-radius:10px;box-shadow:0 1px 4px rgba(0,113,227,0.06);">
            <div style="display:flex;align-items:center;gap:6px;overflow:hidden;">
                <svg width="13" height="13" viewBox="0 0 24 24" fill="none" stroke="#0071e3" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round" style="flex-shrink:0;"><path d="M12 2v14M19 9l-7 7-7-7M5 20h14"/></svg>
                <span style="font-size:11.5px;font-weight:600;color:#0071e3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;">
                    发现新版本 v<span id="ne21NewVerText"></span>
                </span>
            </div>
            <a id="ne21UpdateLink" href="https://scriptcat.org/zh-CN/script-show-page/8255" target="_blank" rel="noopener noreferrer" style="font-size:11px;padding:3px 8px;border-radius:6px;background:#0071e3;color:#fff;text-decoration:none;font-weight:600;white-space:nowrap;flex-shrink:0;transition:opacity .15s;">
                前往更新
            </a>
        </div>
        <div class="ne21-uid" id="ne21AccountStatus" style="display:flex;align-items:center;justify-content:space-between;padding:2px 0;">
            <div style="display:flex;align-items:center;gap:6px;overflow:hidden;">
                <span id="ne21StatusDot" style="display:inline-block;width:8px;height:8px;border-radius:50%;background:#10b981;flex-shrink:0;"></span>
                <span style="font-size:12px;font-weight:600;color:rgba(15,23,42,.88);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;">
                    UID: <b id="ne21CurrentUidText"></b>
                </span>
            </div>
            <span id="ne21VipBadge" style="font-size:11px;padding:2px 8px;border-radius:99px;background:#e0f2fe;color:#0284c7;font-weight:600;">查询中</span>
        </div>
        <div class="ne21-account-card" style="margin:8px 0 10px;padding:10px 12px;background:rgba(255,255,255,.65);border:1px solid rgba(255,255,255,.85);border-radius:14px;box-shadow:0 2px 8px rgba(0,0,0,0.03);">
            <div style="display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;">
                <span style="font-size:12px;color:rgba(15,23,42,.62);">当前账户额度</span>
                <span id="ne21PointsVal" style="font-size:14px;font-weight:700;color:#0f172a;">-- 积分</span>
            </div>
            <div style="display:flex;gap:6px;align-items:center;">
                <a id="ne21RechargeBtn" href="#" target="_blank" class="ne21-btn ne21-btn-primary" style="flex:1;text-align:center;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;padding:6px 0;border-radius:8px;font-size:12px;font-weight:600;color:#fff;background:#0071e3;">
                    充值 / 续费月卡
                </a>
                <button id="ne21RefreshPointsBtn" type="button" class="ne21-btn ne21-btn-secondary" style="padding:6px 10px;border-radius:8px;font-size:11.5px;">
                    刷新
                </button>
                <button id="moreSettingsBtn" type="button" class="ne21-btn ne21-btn-secondary" style="padding:6px 10px;border-radius:8px;font-size:11.5px;">
                    设置
                </button>
            </div>
        </div>
    `);

    // UID 与充值链接在插入后通过 .text() / .attr() 写入，绝不参与 HTML 字符串拼接。
    // （UID 取自 document.cookie 或 localStorage，属于不可信输入；直接插值会让
    //   `<img onerror=...>` 这类内容在学习通页面上下文里执行。）
    try {
        $box.find('#ne21CurrentUidText').text(studentUid || '未登录');
        $box.find('#ne21RechargeBtn').attr('href', buildRechargeHref(studentUid));
        var _curVer = _discoveredNewVersion || (_cloudPolicy && _cloudPolicy.version);
        if (_curVer && isNewerVersion(_curVer, getLocalScriptVersion())) {
            renderUpdateBanner(_curVer);
        }
    } catch { /* 面板尚未就绪 */ }

    // 动态同步账户余额与月卡状态（支持真实网络请求与点击动态反馈）
    // 余额查询重试提示：日志区可能还没插入（首屏时机），失败时静默降级
    var updateLogEntrySafe = function (str, color) {
        try {
            var $p = $box.find('#ne-21log').children('p').first();
            if ($p.length) { $p.find('.ne21-msg').css('color', _ne21LogColorMap[color] || color || '#334155').html(ne21LogText(str)); }
            else { logger(str, color); }
        } catch { /* empty */ }
    };

    // 错误信息归一化统一使用 c0-network.js 里的全局 describeGmError。
    // 这里原先有一份局部实现（var describeGmError = function ...），会在 showBox 作用域内
    // 遮蔽全局版，导致同一个错误在两处日志里格式不同，属重复实现，已删除。

    var refreshAccountBalance = function (e) {
        var isManual = !!(e && (e.type === 'click' || e.isManual));
        var studentUid = getStudentUid();

        var $activeBox = $box.length ? $box : $('#ne-21box');
        if (!$activeBox.length && window.top) {
            try { $activeBox = $('#ne-21box', window.top.document); } catch { /* 忽略 */ }
        }
        if (!$activeBox.length) $activeBox = $(document);

        if (!studentUid) {
            $activeBox.find('#ne21PointsVal').html('<span style="color:#d97706;font-size:12px;">未检测到 UID</span>');
            $activeBox.find('#ne21VipBadge').text('未登录').css({ background: '#fef3c7', color: '#b45309' });
            if (isManual) {
                logger('⚠️ 刷新失败：当前页面未检测到超星登录 UID，请先登录超星账号', 'orange');
            }
            return;
        }

        $activeBox.find('#ne21CurrentUidText').text(studentUid);
        $activeBox.find('#ne21RechargeBtn').attr('href', buildRechargeHref(studentUid));

        var $btn = $activeBox.find('#ne21RefreshPointsBtn');
        if (isManual && $btn.length) {
            $btn.removeClass('ne21-btn-bounce');
            void ($btn[0] && $btn[0].offsetWidth);
            $btn.addClass('ne21-btn-bounce');
            $btn.prop('disabled', true).html('<span class="ne21-btn-spinner" style="vertical-align:middle;margin:0 2px;"></span>');
            logger('正在向云端查询最新额度 (UID: ' + studentUid + ')...', 'gray');
        }

        var handleQueryFail = function (errMsg) {
            if (isManual && $btn.length) {
                $btn.prop('disabled', false).text('刷新');
                $btn.removeClass('ne21-btn-bounce');
                void ($btn[0] && $btn[0].offsetWidth);
                $btn.addClass('ne21-btn-bounce');
            }
            // HTTP 429 是限频而非网络故障：徽章与文案必须区分开，
            // 否则服务端正常限频会被误报成"网络异常"，误导用户排查错误方向。
            var isRateLimit = /HTTP 429/.test(errMsg || '');
            // 把真实失败码带到面板上：否则只看到"网络异常"完全无法判断是
            // 限频、服务端 5xx、CORS 被拦还是真的超时，排查只能靠猜。
            var _statusHint = '';
            var _m = /HTTP (\d{3})/.exec(errMsg || '');
            if (_m) _statusHint = ' HTTP ' + _m[1];
            if (isRateLimit) {
                $activeBox.find('#ne21VipBadge').text('请求频繁').css({ background: '#fef3c7', color: '#b45309' });
                $activeBox.find('#ne21StatusDot').css({ background: '#f59e0b' });
                $activeBox.find('#ne21PointsVal').html('<span style="color:#b45309;font-size:12px;cursor:pointer;" title="点击重新查询">查询过于频繁' + _statusHint + ' (点此重试)</span>');
            } else {
                $activeBox.find('#ne21VipBadge').text('网络异常').css({ background: '#fee2e2', color: '#b91c1c' });
                $activeBox.find('#ne21StatusDot').css({ background: '#ef4444' });
                $activeBox.find('#ne21PointsVal').html('<span style="color:#dc2626;font-size:12px;cursor:pointer;" title="点击重新查询">查询失败' + _statusHint + ' (点此重试)</span>');
            }
            $activeBox.find('#ne21PointsVal').off('click.retry').on('click.retry', function () { refreshAccountBalance({ isManual: true }); });
            logger('❌ ' + errMsg, 'red');
        };

        // 8 秒对跨网 + 反代链路偏紧，冷启动或上游抖动就会误报"网络异常"
        var _BALANCE_TIMEOUT_MS = 15000;
        var _balanceAttempt = 0;
        function _doBalanceQuery() {
        GM_xmlhttpRequest({
            method: 'GET',
            url: sUrl + '/api/user/info?uid=' + encodeURIComponent(studentUid) + '&_t=' + Date.now(),
            headers: ne21AuthHeaders(),
            timeout: _BALANCE_TIMEOUT_MS,
            onload: function (xhr) {
                if (isManual && $btn.length) {
                    $btn.prop('disabled', false).text('刷新');
                    $btn.removeClass('ne21-btn-bounce');
                    void ($btn[0] && $btn[0].offsetWidth);
                    $btn.addClass('ne21-btn-bounce');
                }
                try {
                    if (xhr.status === 200) {
                        var info = JSON.parse(xhr.responseText);
                        var isVip = !!info.isMonthCard;
                        var points = info.points || 0;
                        if (isVip) {
                            $activeBox.find('#ne21PointsVal').html(points + ' 点 <b style="color:#10b981;font-size:11px;">(月卡生效)</b>');
                            $activeBox.find('#ne21VipBadge').text('尊贵月卡').css({ background: '#dcfce7', color: '#15803d' });
                            $activeBox.find('#ne21StatusDot').css({ background: '#10b981' });
                        } else if (info.isTrial && points > 0) {
                            $activeBox.find('#ne21PointsVal').html(points + ' 积分 <b style="color:#0284c7;font-size:11px;">(新人体验)</b>');
                            $activeBox.find('#ne21VipBadge').text('体验会员').css({ background: '#e0f2fe', color: '#0369a1' });
                            $activeBox.find('#ne21StatusDot').css({ background: '#0284c7' });
                        } else if (points > 0) {
                            $activeBox.find('#ne21PointsVal').html(points + ' 积分');
                            $activeBox.find('#ne21VipBadge').text('标准会员').css({ background: '#e0f2fe', color: '#0369a1' });
                            $activeBox.find('#ne21StatusDot').css({ background: '#10b981' });
                        } else {
                            $activeBox.find('#ne21PointsVal').html('<span style="color:#dc2626;">0 积分 (不足)</span>');
                            $activeBox.find('#ne21VipBadge').text('未激活').css({ background: '#fee2e2', color: '#b91c1c' });
                            $activeBox.find('#ne21StatusDot').css({ background: '#ef4444' });
                        }
                        // 在下方日志区域输出详尽的同步信息
                        var vipDesc = '';
                        if (isVip) {
                            var expireStr = info.monthCardExpire ? new Date(info.monthCardExpire).toLocaleDateString() : '长期有效';
                            vipDesc = ' | 月卡特权: 尊贵月卡 (到期: ' + expireStr + ')';
                        } else {
                            vipDesc = ' | 会员类型: 标准用户 (未激活月卡)';
                        }
                        var logMsg = '⚡ 账户额度同步成功！UID: ' + studentUid + ' | 可用积分: ' + points + ' 点' + vipDesc;
                        logger(logMsg, isVip ? 'green' : (points > 0 ? 'blue' : 'orange'));
                    } else {
                        var _detail = '';
                        try { _detail = String(xhr.responseText || '').slice(0, 120); } catch { /* 忽略 */ }
                        handleQueryFail('查询账户额度异常 (HTTP ' + xhr.status + ')' + (_detail ? ' → ' + _detail : ''));
                    }
                } catch {
                    handleQueryFail('解析账户数据异常');
                }
            },
            // onerror 原来完全丢弃了错误对象，导致"网络异常"没有任何可排查信息。
            // 这里把目标 URL、错误类型与状态一并落日志，才能区分是
            // DNS/连接被拒、TLS 失败、被浏览器按 CORS 拦掉，还是真的超时。
            onerror: function (err) {
                var _e = describeGmError(err);
                if (_balanceAttempt < 1) {
                    _balanceAttempt++;
                    updateLogEntrySafe('🔌 云端连接失败，3s 后自动重试...', 'orange');
                    setTimeout(_doBalanceQuery, 3000);
                    return;
                }
                handleQueryFail('无法连接到云端服务（' + _e + '），请检查域名/DNS/证书是否可访问');
            },
            ontimeout: function () {
                if (_balanceAttempt < 1) {
                    _balanceAttempt++;
                    updateLogEntrySafe('⏱️ 查询超时（' + Math.round(_BALANCE_TIMEOUT_MS / 1000) + '秒），3s 后自动重试...', 'orange');
                    setTimeout(_doBalanceQuery, 3000);
                    return;
                }
                handleQueryFail('查询账户额度超时（' + Math.round(_BALANCE_TIMEOUT_MS / 1000) + '秒），请点击重试');
            }
        });
        }
        _doBalanceQuery();
    };

    refreshAccountBalance();
    $box.off('click', '#ne21RefreshPointsBtn').on('click', '#ne21RefreshPointsBtn', refreshAccountBalance);
    // 显式打印云端地址：出现"网络异常"时第一件事就是确认有没有指向正确域名
    logger('☁️ 云端服务地址: ' + getSafeServerUrl(), 'gray');
}


function getStr(str, start, end) {
    let res = str.match(new RegExp(`${start}(.*?)${end}`))
    return res ? res[1] : null
}

function getTaskParams(doc) {
    try {
        var _iframeScripts = (doc || _d).scripts,
            _p = null;
        for (let i = 0; i < _iframeScripts.length; i++) {
            if (_iframeScripts[i].innerHTML.indexOf('mArg = "";') != -1 && _iframeScripts[i].innerHTML.indexOf('==UserScript==') == -1) {
                _p = getStr(_iframeScripts[i].innerHTML.replace(/\s/g, ""), 'try{mArg=', ';}catch');
                return _p
            }
        }
        return _p
    } catch {
        return null
    }

}

function getCk(name) {
    // 按"精确键名"解析 document.cookie。
    // 旧实现用的是无左边界正则 [;\s+]?name=([^;]*)，会命中"以 name 结尾"的其他
    // cookie（例如 my_uid、xUID），从而取到一个错误的 UID——getUser 会自动建行，
    // 结果是查到一个空余额的陌生账号，用户明明买了月卡却显示积分不足，极难排查。
    try {
        var cookies = (document.cookie || '').split(';');
        for (var i = 0; i < cookies.length; i++) {
            var pair = cookies[i].trim();
            var eq = pair.indexOf('=');
            if (eq === -1) continue;
            if (pair.slice(0, eq).trim() === name) {
                return pair.slice(eq + 1);
            }
        }
    } catch { /* 跨域 iframe 中访问 cookie 可能抛错 */ }
    return undefined;
}

// 内置默认服务地址。
//
// 必须做成函数而不是顶层 `var` 常量：本文件在拼接顺序上排在 40-cloud-state.js 与
// 60-entry-dispatch.js 之后，而顶层 var 的「赋值」不参与提升——那两个模块在顶层就会
// 调用 getSafeServerUrl()/showBox()，此刻若回退分支读到未赋值的 var 就会得到
// undefined，请求随之变成 "undefined/api/config/policy"，静默失效且极难排查。
// 函数声明会整体提升，因此任何调用时机都能拿到正确值。
function getDefaultServerUrl() {
    return 'https://xuexitong.icollege.top';
}
var _ne21ServerUrlWarned = false;
function getSafeServerUrl() {
    var raw = (localStorage.getItem('GPTJsSetting.serverUrl') || setting.serverUrl || getDefaultServerUrl()).trim();
    var u = raw, reason = '';

    if (!u || /localhost|127\.0\.0\.1|0\.0\.0\.0/i.test(u)) {
        reason = '本地/回环地址不可用';
        u = getDefaultServerUrl();
    } else if (!/^https?:\/\//i.test(u)) {
        reason = '地址缺少 http(s):// 协议前缀';
        u = getDefaultServerUrl();
    } else {
        // 强制 https：学习通是 https 站点，从 https 页面向 http 地址发请求会被浏览器
        // 按"混合内容"直接拦截，用户看到的是"无法连接"，但手动在地址栏访问却完全正常。
        if (/^http:\/\//i.test(u)) {
            u = u.replace(/^http:\/\//i, 'https://');
            reason = '已从 http 升级为 https';
        }
        u = u.replace(/\/+$/, '');
        try { new URL(u); } catch {
            reason = 'URL 格式非法';
            u = getDefaultServerUrl();
        }
    }

    if (reason && !_ne21ServerUrlWarned) {
        _ne21ServerUrlWarned = true;
        try {
            logger('⚠️ 服务地址异常（' + reason + '）：' + raw + ' → 已回退为 ' + u, 'orange');
            localStorage.setItem('GPTJsSetting.serverUrl', u);
        } catch { /* 面板未就绪时静默 */ }
    }
    return u;
}

// ==========================================
// 设备密钥
//
// 学习通 UID 是半公开信息（URL、截图、共享屏幕都会露出）。单独当凭据用时，
// 任何人知道他人 UID 就能读余额、刷光积分。这里为每台设备生成一个随机密钥，
// 随请求头 X-Device-Secret 发送；服务端首次见到某 UID 时把该密钥与其绑定，
// 之后必须完全一致才放行。
//
// 必须用 GM_getValue / GM_setValue（脚本级全局存储），不能用本文件的 localStorage
// 代理：后者按主域名加前缀做隔离，同一用户在 chaoxing.com 与 xueyinonline.com
// 会各拿到一把不同的密钥，导致绑定互相打架。
// ==========================================
var _ne21DeviceSecretCache = null;
function getDeviceSecret() {
    if (_ne21DeviceSecretCache) return _ne21DeviceSecretCache;
    var s = '';
    try { s = GM_getValue('GPTJsDeviceSecret') || ''; } catch { /* empty */ }
    if (!/^[a-f0-9]{32}$/i.test(String(s))) {
        s = '';
        try {
            var bytes = new Uint8Array(16);
            var c = (typeof crypto !== 'undefined' && crypto) ? crypto : ((typeof window !== 'undefined' && window.crypto) ? window.crypto : null);
            if (c && c.getRandomValues) {
                c.getRandomValues(bytes);
            } else {
                for (var i = 0; i < 16; i++) bytes[i] = Math.floor(Math.random() * 256);
            }
            for (var j = 0; j < 16; j++) s += ('0' + bytes[j].toString(16)).slice(-2);
        } catch { s = ''; }
        if (s) { try { GM_setValue('GPTJsDeviceSecret', s); } catch { /* empty */ } }
    }
    _ne21DeviceSecretCache = String(s).toLowerCase();
    if (!_ne21DeviceSecretCache) {
        try { logger('⚠️ 无法生成本机设备密钥，云端解答可能被拒绝', 'orange'); } catch { /* 面板未就绪 */ }
    }
    return _ne21DeviceSecretCache;
}

// 是否应当向自有服务发起云控请求。
//
// 背景：@match 里保留了 *://*.edu.cn/* 与 *://*.ac.cn/* 这类整域通配，
// 因为很多学校把学习通部署在自建域名下，而 URL 匹配无法表达"这是超星系环境"。
// 代价是脚本会在所有高校站点上加载。核心功能本身已按 pathname 路由（不在
// 匹配路径上就什么都不做），但云控请求是无条件发的 —— 等于在任意高校页面上
// 都会向我们服务器发一次请求，既无必要，也容易被站方视为异常外联。
//
// 这里用"平台指纹"做二次判定，且只用于决定要不要发云控请求（不影响任何答题
// 功能）：判定失败时**放行**，宁可多发一次请求，也不冒漏判导致功能缺失的风险。
function shouldContactCloud() {
    try {
        if (/chaoxing\.com$/i.test(location.hostname || '')) return true; // 官方域，必然支持
        var scripts = document.scripts || [];
        for (var i = 0; i < scripts.length; i++) {
            var t = scripts[i] && scripts[i].textContent;
            if (t && t.indexOf('mArg') !== -1) return true;           // 学习通页面标志性内联变量
        }
        if (document.querySelector('.navshow, #mainid, .mark_table, .chapter_item, .newTestCon')) return true;
        if (/^\/(mycourse|work|exam|knowledge|mooc2|ananas|visit)\//.test(location.pathname || '')) return true;
        return false;
    } catch {
        return true; // 判定异常时放行（fail-open）
    }
}

// 统一构造带设备密钥的请求头，避免各处漏加
function ne21AuthHeaders(extra) {
    var h = extra || {};
    var secret = getDeviceSecret();
    if (secret) h['X-Device-Secret'] = secret;
    return h;
}

// 充值中心地址同样来自 localStorage（GPTJsSetting.rechargeUrl），必须做协议白名单：
// 它会被写进 <a href>，若允许 javascript: / data: 等协议即为点击型 XSS 与钓鱼入口。
function getSafeRechargeUrl() {
    var raw = '';
    try { raw = (localStorage.getItem('GPTJsSetting.rechargeUrl') || setting.rechargeUrl || '').trim(); } catch { /* empty */ }
    if (!raw || !/^https:\/\//i.test(raw)) {
        if (raw) {
            // 只允许 https：http 会在 https 页面里被按混合内容拦截，也不利于支付安全
            try { logger('⚠️ 充值地址协议不受支持，已回退为默认地址: ' + raw, 'orange'); } catch { /* 面板未就绪 */ }
        }
        raw = getDefaultServerUrl() + '/index.html';
    }
    return raw;
}

// 构造充值页 URL：uid 必须编码后再拼接，避免特殊字符逃逸进 URL 结构。
// 调用方必须用 jQuery .attr() 写 href（而非字符串插值进 HTML），双重保险。
//
// 设备密钥走 URL fragment（#ds=...）而不是 query：
// fragment 不会进入请求行、Referer 与服务器访问日志；充值页读取后立刻从
// 地址栏抹掉。这样"付费重绑"才能拿到与面板一致的设备身份。
function buildRechargeHref(uid) {
    var base = getSafeRechargeUrl();
    var url = base;
    if (uid) url += (base.indexOf('?') === -1 ? '?' : '&') + 'uid=' + encodeURIComponent(String(uid));
    var secret = getDeviceSecret();
    if (secret) url += '#ds=' + secret;
    return url;
}

// 把 GM_xmlhttpRequest 的错误对象展开成可读信息。
// onerror 的触发原因很多（DNS、TLS、混合内容、CORS 被拦截、连接被重置），
// 只打印"无法连接"等于没给排查线索，必须把能拿到的字段全部带出来。
function describeGmError(err) {
    if (!err) return '未知错误';
    if (typeof err === 'string') return err;
    var parts = [];
    try {
        if (err.error) {
            // 脚本管理器传过来的 err.error 可能是 Error、也可能是 {message} 对象，
            // 直接 String() 会退化成 "[object Object]"，必须优先取 message。
            var em = err.error && err.error.message ? err.error.message : err.error;
            parts.push('error=' + String(em).slice(0, 160));
        } else if (err.message) {
            parts.push('message=' + String(err.message).slice(0, 160));
        }
        if (err.status !== undefined && err.status !== null) parts.push('status=' + err.status);
        if (err.readyState !== undefined) parts.push('readyState=' + err.readyState);
        if (err.finalUrl) parts.push('finalUrl=' + err.finalUrl);
        if (err.responseText) parts.push('body=' + String(err.responseText).slice(0, 160));
        if (!parts.length) parts.push(JSON.stringify(err).slice(0, 200));
    } catch (err) {
        parts.push(String(err).slice(0, 200));
    }
    return parts.join(' | ');
}

function getStudentUid() {
    var uid = getCk('_uid') || getCk('UID') || getCk('cx_uid');
    if (!uid && window.top && window.top !== window) {
        try {
            var topDoc = window.top.document;
            var m = (topDoc.cookie || '').match(/(?:^|;\s*)(?:_uid|UID|cx_uid)=([^;]+)/);
            if (m) uid = m[1];
            if (!uid && window.top.UID) uid = String(window.top.UID);
        } catch { /* 忽略 */ }
    }
    if (!uid) {
        uid = localStorage.getItem('GPTJsSetting.manualUid') || '';
    }
    return uid ? String(uid).trim() : '';
}


// 课程页可能被门户 iframe 包裹，导航应发生在 studentstudy 页面而非固定的 top。
function getStudyWindow() {
    var current = _w;
    try {
        while (current) {
            if (current.location.pathname.includes('/mycourse/studentstudy')) return current;
            if (current === current.parent) break;
            current = current.parent;
        }
    } catch { /* 跨域父页面不可访问 */ }
    return _w.top;
}

function getStudyCardsDocument(studyWindow) {
    try {
        if (studyWindow.location.pathname.includes('/knowledge/cards')) return studyWindow.document;
        for (var i = 0; i < studyWindow.frames.length; i++) {
            var doc = getStudyCardsDocument(studyWindow.frames[i]);
            if (doc) return doc;
        }
    } catch { /* 尚未加载或跨域的 iframe 不参与空页判定 */ }
    return null;
}

function isEmptyStudyPage(doc) {
    if (!doc || doc.readyState !== 'complete') return false;
    // 关键安全网：如果有音视频元素、活动 iframe 或任务容器，绝对不可视为空页面
    try {
        if (doc.querySelector('video, audio, iframe, .ans-attach-ct, .ans-job-ct, .ans-job-icon')) return false;
    } catch { /* 忽略 */ }
    var params = getTaskParams(doc);
    try {
        var parsed = JSON.parse(params);
        if (parsed && Array.isArray(parsed.attachments)) {
            return parsed.attachments.length === 0;
        }
    } catch { /* 无任务参数时再检查已加载的课程内容 */ }
    return !!doc.querySelector('.ans-cc') &&
        !doc.querySelector('.ans-attach-ct, .ans-job-ct, .chapter-item');
}

// 父页面兜底与 cards 脚本共用一次导航，延迟期间切页或暂停时不误点新页面。
function scheduleStudyNavigation(studyWindow, navigate) {
    var doc = studyWindow.document;
    var cardsDoc = getStudyCardsDocument(studyWindow);
    // 超星异步刷新目录会替换节点；同一章节不能因 DOM 重建被误判为切页。
    var activeChapterId = doc.querySelector('.posCatalog_active')?.id || '';
    var currentKeys = (typeof getCurrentSectionKeys === 'function') ? getCurrentSectionKeys(studyWindow) : [];
    var chapterId = activeChapterId || (currentKeys[0] || '');
    var pending = studyWindow._gptJsNextPagePending;
    if (pending && pending.cardsDoc === cardsDoc && pending.chapterId === chapterId) return;
    pending = { cardsDoc: cardsDoc, chapterId: chapterId };
    studyWindow._gptJsNextPagePending = pending;

    function release() {
        if (studyWindow._gptJsNextPagePending === pending) studyWindow._gptJsNextPagePending = null;
    }
    studyWindow.setTimeout(function run() {
        var nowActiveId = doc.querySelector('.posCatalog_active')?.id || '';
        var curChapterId = nowActiveId || ((typeof getCurrentSectionKeys === 'function' ? getCurrentSectionKeys(studyWindow)[0] : '') || '');
        // 关键防护优化：仅当顶层窗口完全重载，或用户显式手动点击切换到了完全不同的另一章节时才取消自动导航
        if (studyWindow.document !== doc || (chapterId && curChapterId && curChapterId !== chapterId)) {
            release();
            return;
        }
        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
            studyWindow.setTimeout(run, 1000);
            return;
        }
        try {
            var maybe = navigate();
            if (maybe && typeof maybe.then === 'function') {
                // 异步校验型 navigate（子任务标签切换）：等它自己确认是否真的切成功了，
                // 再决定要不要走兜底。旧实现这里只能拿同步布尔值，而标签切换的回调
                // 无条件 return true，等于向调度层谎报成功，兜底直达永远不执行。
                maybe.then(function (ok) {
                    if (ok) { release(); return; }
                    studyWindow.setTimeout(runFallbackOnce, 1500);
                }, function () {
                    studyWindow.setTimeout(runFallbackOnce, 1500);
                });
                return;
            }
            if (!maybe) {
                studyWindow.setTimeout(runFallbackOnce, 1500);
            }
        } catch (error) {
            release();
            logger('自动切换失败：' + error.message, 'red');
        }

        function runFallbackOnce() {
            try {
                autoHandleChapterNoteModal();
                var fallbackNext = findNextUnfinishedSection(studyWindow);
                if (fallbackNext && fallbackNext.element) {
                    var clickTarget = fallbackNext.element.querySelector('.posCatalog_name, .posCatalog_select, a') || fallbackNext.element;
                    if (clickTarget) {
                        if (typeof ne21HumanClick === 'function') ne21HumanClick(clickTarget); else clickTarget.click();
                        logger('已通过目录树兜底直达下一未完成小节：【' + fallbackNext.name + '】', 'blue');
                    }
                } else {
                    clickNextChapterBtn(studyWindow);
                }
            } catch { /* 忽略 */ }
            release();
        }
        // 关键安全网：若 navigate() 触发弹窗或被拦截导致页面未卸载，6秒后兜底释放锁，杜绝切页永久死锁
        studyWindow.setTimeout(release, 6000);
    }, 2000);
}


// ==========================================
// 跨文档与多层嵌套 iframe DOM 文档收集器
// ==========================================
function getAllAccessibleDocuments() {
    var docs = [];
    function addDoc(d) {
        if (!d || !d.body) return;
        for (var i = 0; i < docs.length; i++) {
            if (docs[i] === d) return;
        }
        docs.push(d);
    }
    try { addDoc(document); } catch { /* 忽略 */ }
    try { if (window.parent) addDoc(window.parent.document); } catch { /* 忽略 */ }
    try { if (window.top) addDoc(window.top.document); } catch { /* 忽略 */ }

    function scanSubFrames(win) {
        try {
            if (!win || !win.frames) return;
            for (var i = 0; i < win.frames.length; i++) {
                try {
                    var fw = win.frames[i];
                    if (fw && fw.document) {
                        addDoc(fw.document);
                        scanSubFrames(fw);
                    }
                } catch { /* 跨域跳过 */ }
            }
        } catch { /* 忽略 */ }
    }
    try { scanSubFrames(window); } catch { /* 忽略 */ }
    try { if (window.top && window.top !== window) scanSubFrames(window.top); } catch { /* 忽略 */ }

    // 针对动态挂载或无 name 属性的 iframe 元素进行深度递归扫描
    function scanIframeElements(doc) {
        try {
            if (!doc || !doc.querySelectorAll) return;
            var iframes = doc.querySelectorAll('iframe');
            for (var i = 0; i < iframes.length; i++) {
                try {
                    var ifr = iframes[i];
                    var subDoc = ifr.contentDocument || (ifr.contentWindow && ifr.contentWindow.document);
                    if (subDoc) {
                        addDoc(subDoc);
                        scanIframeElements(subDoc);
                    }
                } catch { /* 跨域跳过 */ }
            }
        } catch { /* 忽略 */ }
    }
    for (var d = 0; d < docs.length; d++) {
        try { scanIframeElements(docs[d]); } catch { /* 忽略 */ }
    }

    return docs;
}

// 判断元素是否属于脚本自身的悬浮面板（#ne-21box 或其子孙节点、拖拽遮罩）
function isElementInsideOurPanel(el) {
    if (!el) return false;
    try {
        if (el.id === 'ne-21box' || (el.classList && (el.classList.contains('ne21-drag-mask') || el.classList.contains('ne21-box')))) return true;
        if (el.closest) return !!el.closest('#ne-21box, .ne21-drag-mask, .ne21-box');
        var p = el.parentElement;
        while (p) {
            if (p.id === 'ne-21box' || (p.classList && (p.classList.contains('ne21-drag-mask') || p.classList.contains('ne21-box')))) return true;
            p = p.parentElement;
        }
    } catch { /* 忽略 */ }
    return false;
}

// 判断元素在屏幕中是否真实可见（排除 display:none, visibility:hidden 或已收起的历史残留 DOM）
function isElementVisible(el) {
    if (!el) return false;
    try {
        var win = el.ownerDocument && el.ownerDocument.defaultView;
        var style = win ? win.getComputedStyle(el) : null;
        if (style) {
            if (style.display === 'none' || style.visibility === 'hidden') return false;
        }
        if (el.offsetWidth === 0 && el.offsetHeight === 0) {
            var rects = el.getClientRects ? el.getClientRects() : null;
            if (rects && rects.length > 0) return true;
            // 若节点含有实质性验证码或 9010 文本，且未被显式隐藏，不因 iframe 或嵌套布局中的 offsetWidth 临时为 0 误判为不可见
            var txt = (el.innerText || el.textContent || '');
            if (txt.indexOf('9010') !== -1 || /请输入图片中的验证码/.test(txt)) {
                return !style || (style.display !== 'none' && style.visibility !== 'hidden');
            }
            return false;
        }
        return true;
    } catch {
        return true;
    }
}

// 提取文档正文纯文本，严格过滤掉脚本自身悬浮窗（#ne-21box），防止日志中的提示文案形成自反馈误触
function getDocTextExcludingOurPanel(doc) {
    if (!doc || !doc.body) return '';
    try {
        var box = doc.querySelector('#ne-21box');
        if (!box) {
            return doc.body.innerText || doc.body.textContent || '';
        }
        var text = '';
        var children = doc.body.children;
        for (var i = 0; i < children.length; i++) {
            var child = children[i];
            if (isElementInsideOurPanel(child)) continue;
            text += ' ' + (child.innerText || child.textContent || '');
        }
        return text;
    } catch {
        return doc.body.innerText || doc.body.textContent || '';
    }
}

// 探测页面中是否包含当前【真实可见】的风控弹窗或验证码交互元素
function isAnyCaptchaModalVisible(doc) {
    try {
        // 1. 全面检索包含 9010、操作异常、请输入图片中的验证码 等语义节点
        var candidateNodes = doc.querySelectorAll('h1, h2, h3, h4, h5, h6, p, div, span, b, strong, font, td, th, label, center, form, section, .pop_box, .vjs-modal-dialog');
        for (var i = 0; i < candidateNodes.length; i++) {
            var el = candidateNodes[i];
            if (isElementInsideOurPanel(el)) continue;
            var t = (el.innerText || el.textContent || '');
            if ((t.indexOf('9010') !== -1 || /请输入图片中的验证码/.test(t)) && /操作异常|验证码|安全验证/.test(t)) {
                if (isElementVisible(el)) {
                    return true;
                }
            }
        }
        // 2. 查找可见的验证码输入框
        var inputs = doc.querySelectorAll('input');
        for (var j = 0; j < inputs.length; j++) {
            var inp = inputs[j];
            if (isElementInsideOurPanel(inp)) continue;
            var ph = (inp.placeholder || '') + ' ' + (inp.name || '') + ' ' + (inp.id || '');
            if (/输入验证码|验证码|captcha|vercode|imgcode/i.test(ph) && isElementVisible(inp)) {
                return true;
            }
        }
    } catch { /* 忽略 */ }
    return false;
}

// 判定特定 DOM 文档是否包含超星 9010 风控异常验证码
function isCaptchaInDoc(doc) {
    if (!doc || !doc.body) return false;
    var bodyText = getDocTextExcludingOurPanel(doc);
    if (!bodyText) return false;

    // 1. 明确匹配 9010 错误码与超星风控语义组合
    if (bodyText.indexOf('9010') !== -1) {
        if (/操作异常|异常操作|安全验证|行为验证|验证中心|滑块|点击验证|频繁|请输入图片中的验证码|验证码/.test(bodyText)) {
            if (isAnyCaptchaModalVisible(doc)) return true;
            // 兜底：文档正文明确出现 9010 且包含风控文本，且节点不在脚本面板中，确认为风控
            var headings = doc.querySelectorAll('h1, h2, h3, h4, h5, h6, p, div, span, b, strong, font, td, th, label, center, form');
            for (var h = 0; h < headings.length; h++) {
                var hNode = headings[h];
                if (isElementInsideOurPanel(hNode)) continue;
                var ht = (hNode.innerText || hNode.textContent || '');
                if (ht.indexOf('9010') !== -1 && /操作异常|请输入图片中的验证码|安全验证/.test(ht)) {
                    return true;
                }
            }
        }
    }

    // 2. 匹配超星弹出的无明确 9010 标识但属于同一类风控拦截的图片/滑块验证弹窗
    if (/操作异常/.test(bodyText) && /请输入图片中的验证码|图形验证码|拖动滑块|完成安全验证/.test(bodyText)) {
        if (isAnyCaptchaModalVisible(doc)) return true;
    }

    // 3. 匹配特定的可见验证码图片与输入框 DOM 结构特征
    try {
        var captchaImg = doc.querySelector('img[src*="validate"], img[src*="captcha"], img[src*="code"], img[src*="verCode"], #imgCode, #vercode');
        if (captchaImg && !isElementInsideOurPanel(captchaImg) && /操作异常|验证码|安全验证/.test(bodyText)) {
            var captchaInput = doc.querySelector('input[name*="code" i], input[placeholder*="验证码"], #code, #verCode');
            if (captchaInput && !isElementInsideOurPanel(captchaInput)) return true;
        }
    } catch { /* 忽略 */ }

    // 4. 匹配主流滑块/安全验证交互特征容器
    try {
        var sliderOrVerify = doc.querySelector('.nc_wrapper, .geetest_holder, .slide-verify, #captchaBox, .verify-container');
        if (sliderOrVerify && !isElementInsideOurPanel(sliderOrVerify)) return true;
    } catch { /* 忽略 */ }

    return false;
}

// 跨 iframe / 跨窗口共享的风控锁定状态管理
function isCaptchaBlocked() {
    try {
        if (localStorage.getItem('GPTJs_CaptchaBlocked') === 'true') return true;
        if (sessionStorage.getItem('GPTJs_CaptchaBlocked') === 'true') return true;
        if (window._gptCaptchaBlocked) return true;
        if (window.top && window.top._gptCaptchaBlocked) return true;
    } catch { /* 忽略 */ }
    return false;
}

function clearCaptchaBlocked() {
    try { localStorage.removeItem('GPTJs_CaptchaBlocked'); } catch { /* 忽略 */ }
    try { sessionStorage.removeItem('GPTJs_CaptchaBlocked'); } catch { /* 忽略 */ }
    try { localStorage.removeItem('GPTJs_CaptchaLastDetected'); } catch { /* 忽略 */ }
    window._gptCaptchaBlocked = false;
    try {
        if (window.top) {
            window.top._gptCaptchaBlocked = false;
            window.top._gptCaptchaPromptLogged = false;
            window.top._gptCaptchaCleanTicks = 0;
            window.top._gptCaptchaLastDetectedTime = 0;
        }
    } catch { /* 忽略 */ }
}

function setCaptchaBlocked() {
    try { localStorage.setItem('GPTJs_CaptchaBlocked', 'true'); } catch { /* 忽略 */ }
    try { sessionStorage.setItem('GPTJs_CaptchaBlocked', 'true'); } catch { /* 忽略 */ }
    window._gptCaptchaBlocked = true;
    try { if (window.top) window.top._gptCaptchaBlocked = true; } catch { /* 忽略 */ }
}

// ==========================================
// 超星风控异常验证码（【9010】操作异常）全局探测、主动熔断与自愈恢复
// ==========================================
function checkChaoxingCaptcha() {
    try {
        var docs = getAllAccessibleDocuments();
        var hasCaptcha = false;

        for (var i = 0; i < docs.length; i++) {
            if (isCaptchaInDoc(docs[i])) {
                hasCaptcha = true;
                break;
            }
        }

        var now = Date.now();
        var topWin = window.top || window;

        if (hasCaptcha) {
            // 实时记录最新检出时间戳与重置连续干净计数
            topWin._gptCaptchaCleanTicks = 0;
            topWin._gptCaptchaLastDetectedTime = now;
            try {
                localStorage.setItem('GPTJs_CaptchaLastDetected', String(now));
            } catch { /* 忽略 */ }

            var wasBlocked = isCaptchaBlocked();
            setCaptchaBlocked();
            localStorage.setItem('GPTJsSetting.isPaused', 'true');

            // 主动熔断：立即暂停所有正在播放的音视频，防止后台静默播放继续踩雷
            for (var d = 0; d < docs.length; d++) {
                try {
                    var medias = docs[d].querySelectorAll('video, audio');
                    for (var m = 0; m < medias.length; m++) {
                        if (!medias[m].paused) {
                            try { medias[m].pause(); } catch { /* 忽略 */ }
                        }
                    }
                } catch { /* 忽略 */ }
            }

            // 同步悬浮窗暂停按钮 UI 为“已暂停”
            try {
                if (typeof window.syncPauseButtonUI === 'function') window.syncPauseButtonUI(true);
                else if (window.top && typeof window.top.syncPauseButtonUI === 'function') window.top.syncPauseButtonUI(true);
            } catch { /* 忽略 */ }

            // 严谨告警：首次检出（或未提示过）时，明确输出警示日志
            if (!wasBlocked || !topWin._gptCaptchaPromptLogged) {
                topWin._gptCaptchaPromptLogged = true;
                logger('超星安全风控验证（操作异常）', 'red');
            }
            return true;
        } else {
            // 自愈恢复前置核验：当前探测未直接抓到验证码，但系统正处于风控锁定状态
            if (isCaptchaBlocked()) {
                // 1. 跨 frame 协同保护：检查最近 3500ms 内是否仍有其他 frame 探测到验证码
                var lastDetected = topWin._gptCaptchaLastDetectedTime || 0;
                try {
                    var storedTime = Number(localStorage.getItem('GPTJs_CaptchaLastDetected') || 0);
                    if (storedTime > lastDetected) lastDetected = storedTime;
                } catch { /* 忽略 */ }

                if (now - lastDetected < 3500) {
                    // 其他 frame 刚刚探测到验证码，本 frame 绝不提前冒然解除
                    topWin._gptCaptchaCleanTicks = 0;
                    return true;
                }

                // 2. 连续 3 轮（约 3 秒）跨文档全量复核均确认无验证码残留，方可确信用户已成功完成验证
                topWin._gptCaptchaCleanTicks = (topWin._gptCaptchaCleanTicks || 0) + 1;
                if (topWin._gptCaptchaCleanTicks < 3) {
                    return true;
                }

                // ===== 确认解除：用户已成功完成验证码 =====
                topWin._gptCaptchaCleanTicks = 0;
                topWin._gptCaptchaPromptLogged = false;
                clearCaptchaBlocked();
                localStorage.setItem('GPTJsSetting.isPaused', 'false');
                try {
                    if (typeof window.syncPauseButtonUI === 'function') window.syncPauseButtonUI(false);
                    else if (window.top && typeof window.top.syncPauseButtonUI === 'function') window.top.syncPauseButtonUI(false);
                } catch { /* 忽略 */ }
                logger('✅ 超星风控验证码已解除，脚本已自动恢复运行！', 'green');

                // 核心自愈：立刻主动恢复播放所有正在挂起的音视频！
                for (var d2 = 0; d2 < docs.length; d2++) {
                    try {
                        var medias2 = docs[d2].querySelectorAll('video, audio');
                        for (var m2 = 0; m2 < medias2.length; m2++) {
                            var med = medias2[m2];
                            if (med.paused && !med.ended) {
                                try {
                                    med.muted = true;
                                    var playPromise = med.play();
                                    if (playPromise && typeof playPromise.catch === 'function') {
                                        playPromise.catch(function () {});
                                    }
                                } catch { /* 忽略 */ }
                            }
                        }
                        var bigPlayBtn = docs[d2].querySelector('.vjs-big-play-button, .playBtn, button.vjs-play-control, .ans-video-play');
                        if (bigPlayBtn && isElementVisible(bigPlayBtn)) {
                            try {
                                if (typeof ne21HumanClick === 'function') ne21HumanClick(bigPlayBtn);
                                else bigPlayBtn.click();
                            } catch { /* 忽略 */ }
                        }
                    } catch { /* 忽略 */ }
                }
            }
            return false;
        }
    } catch {
        return false;
    }
}

// ==========================================
// 课时子任务标签探测与统一任务流转推进引擎
// ==========================================
// 真实的课时子任务胶囊通常带序号、纯数字或任务类型文案（如 "1 视频" / "2 章节测试" / "2 章节测验" / "1" / "视频"）。
// 正则匹配丰富格式，并过滤掉目录、已完成等导航性文本，避免把装饰性节点当成任务标签。
var SUBTASK_LABEL_RE = /^(?:[1-9]\d*(?:\.\d+)*\s*[.、．:：)）-]?\s*(?:视频|音频|文档|阅读|章节测验|章节测试|测验|测试|自测|作业|讨论|考试|ppt|课件|图文|练习|知识点|任务|随堂|课后|互动|思考|单元|拓展|检测|[\u4e00-\u9fa5a-zA-Z0-9_\-\s]{1,20})?|[1-9]\d*|(?:\([1-9]\d*\)|【[1-9]\d*】)\s*(?:视频|音频|文档|阅读|章节测验|章节测试|测验|测试|自测|作业|讨论|考试|ppt|课件|图文|练习|知识点|任务|随堂|课后|互动|思考|[\u4e00-\u9fa5a-zA-Z0-9_\-\s]{1,20})?|(?:任务|模块|第)[1-9一二三四五六七八九十\d]+.*|(?:视频|音频|文档|阅读|章节测验|章节测试|测验|测试|自测|作业|讨论|考试|ppt|课件|图文|练习|知识点|任务|随堂|课后|互动|思考)(?:\s*\d+)?)$/i;

function subTaskLabel(t) {
    if (!t) return '';
    try { return String(t.innerText || t.textContent || '').replace(/\s+/g, ' ').trim(); } catch { return ''; }
}

function isSubTaskCandidate(t) {
    var label = subTaskLabel(t);
    if (!label) return false;
    if (['目录', '已完成', '未完成', '待完成', '收起', '展开', '返回', '设置', '退出', '上一节', '下一节', '上一页', '下一页', '提交', '保存', '重做', '刷新'].indexOf(label) !== -1) return false;
    return SUBTASK_LABEL_RE.test(label);
}

// 元素是否真的渲染出来了。模板节点、display:none 的占位 span 一律剔除：
// 它们的 innerText 为空，点下去也不会有任何反应，正是"卡住不切换"的元凶。
function isRenderedEl(t) {
    if (!t || typeof t.getBoundingClientRect !== 'function') return false;
    try {
        var r = t.getBoundingClientRect();
        if (r.width === 0 && r.height === 0) return false;
        var view = (t.ownerDocument && t.ownerDocument.defaultView) || window;
        var cs = view.getComputedStyle(t);
        if (cs && (cs.display === 'none' || cs.visibility === 'hidden')) return false;
    } catch { /* 跨域或异常时不拦截，宁可误判也不漏判 */ }
    return true;
}

// 判定一个子任务胶囊是否处于激活态：类名 > 内嵌选中标记 > aria属性 > 蓝底高亮。
// 与旧实现的差别：先过 isRenderedEl，隐藏节点不再可能被当成激活项。
function isActiveSubTaskTab(t) {
    if (!isRenderedEl(t)) return false;
    if (t.classList && (t.classList.contains('active') || t.classList.contains('cur') || t.classList.contains('current') || t.classList.contains('on') || t.classList.contains('selected') || t.classList.contains('select') || t.classList.contains('activeTab') || t.classList.contains('active_tab') || t.classList.contains('active-tab') || t.classList.contains('is-active'))) return true;
    if (t.querySelector('.active, .cur, .current, .on, .selected, .select, [class*="active"], [class*="selected"], [class*="cur"]')) return true;
    if (t.getAttribute && (t.getAttribute('aria-selected') === 'true' || t.getAttribute('aria-current') === 'true')) return true;
    try {
        var view = (t.ownerDocument && t.ownerDocument.defaultView) || window;
        var cs = view.getComputedStyle(t);
        var bg = cs.backgroundColor;
        if (bg && bg !== 'rgba(0, 0, 0, 0)' && bg !== 'transparent' && !bg.includes('255, 255, 255')) {
            var m = bg.match(/\d+/g);
            if (m && m.length >= 3) {
                var r = parseInt(m[0]), b = parseInt(m[2]);
                if (b > r + 30 && b > 120) return true;
            }
        }
        var col = cs.color;
        if (col) {
            var mc = col.match(/\d+/g);
            if (mc && mc.length >= 3) {
                var cr = parseInt(mc[0]), cb = parseInt(mc[2]);
                if (cb > cr + 40 && cb > 140) return true;
            }
        }
    } catch { /* 忽略 */ }
    return false;
}

function getActiveSubTaskText(tabs) {
    for (var j = 0; j < tabs.length; j++) {
        if (isActiveSubTaskTab(tabs[j])) return subTaskLabel(tabs[j]);
    }
    return '';
}

function findNextSubTaskTab(studyWindow) {
    try {
        var docs = [studyWindow.document];
        var cDoc = (typeof getStudyCardsDocument === "function") ? getStudyCardsDocument(studyWindow) : null;
        if (cDoc && !docs.includes(cDoc)) docs.push(cDoc);
        if (typeof window !== 'undefined' && window.document && !docs.includes(window.document)) docs.push(window.document);
        if (typeof window !== 'undefined' && window.top && window.top.document && !docs.includes(window.top.document)) docs.push(window.top.document);

        for (var d = 0; d < docs.length; d++) {
            var doc = docs[d];
            if (!doc || !doc.body) continue;

            var selectors = [
                '#prev_tab > li', '.prev_ul > li', '#prevTabBox > li', '.posTab > li',
                '.tabLi', '.tab-item', '.tabitem', '.tab_item', '.course_tab li', '.chapter_tab li',
                'ul[class*="tab"] > li', 'div[class*="tab"] > a', 'div[class*="tab"] > button', 'div[class*="tab"] > span', 'div[class*="tab"] > div',
                '.roundTab', '.roundTab li', '.roundTab a', '.roundTab span',
                '.cardTab', '.head_content li', '.head_content span', '.head_content a',
                '.prev_title > span', '.prev_title > div', '.prev_title > a',
                '.ans-job-tabs > span', '.ans-job-tabs > a', '.task-tab, .task_tab, .taskTabs > div'
            ];
            var candidateGroups = [];
            for (var s = 0; s < selectors.length; s++) {
                var nodes = doc.querySelectorAll(selectors[s]);
                if (nodes && nodes.length > 1) {
                    candidateGroups.push(Array.prototype.slice.call(nodes));
                }
            }

            // 候选 2：基于文本前缀挖掘同父级的子任务胶囊组（如 "1 视频" 与 "2 章节测试"）
            var allDoms = doc.querySelectorAll('a, button, span, div, li');
            var matchedParents = [];
            for (var i = 0; i < allDoms.length; i++) {
                var el = allDoms[i];
                if (!isSubTaskCandidate(el)) continue;
                var p = el.parentElement;
                if (p && !matchedParents.includes(p) && p.children.length > 1) {
                    matchedParents.push(p);
                    var subItems = [];
                    for (var c = 0; c < p.children.length; c++) {
                        var ch = p.children[c];
                        if (isSubTaskCandidate(ch) || (ch.querySelector && isSubTaskCandidate(ch.querySelector('a, button, span, div')))) {
                            subItems.push(ch);
                        }
                    }
                    if (subItems.length > 1) candidateGroups.push(subItems);
                }
            }

            // 对每一个候选标签组，精准识别当前哪一个是 ACTIVE
            for (var g = 0; g < candidateGroups.length; g++) {
                var tabs = candidateGroups[g];
                // 关键收口：整组至少要两个"带序号 + 任务类型文案"的可见成员，
                // 否则这组只是装饰性节点（图标占位、模板残留），直接跳过。
                var labeled = [];
                for (var k = 0; k < tabs.length; k++) if (isSubTaskCandidate(tabs[k])) labeled.push(tabs[k]);
                if (labeled.length < 2) continue;

                var activeIdx = -1;
                for (var j = 0; j < tabs.length; j++) {
                    if (isActiveSubTaskTab(tabs[j]) || (tabs[j].querySelector && isActiveSubTaskTab(tabs[j].querySelector('*')))) {
                        activeIdx = j;
                        break;
                    }
                }

                // 核心法则：只有当明确找到激活项，且其后存在未执行的候选标签时，才返回下一个任务标签！
                if (activeIdx !== -1 && activeIdx < tabs.length - 1) {
                    var nextTab = null;
                    for (var n = activeIdx + 1; n < tabs.length; n++) {
                        if (isSubTaskCandidate(tabs[n]) || (tabs[n].querySelector && isSubTaskCandidate(tabs[n].querySelector('a, button, span, div')))) {
                            nextTab = tabs[n];
                            break;
                        }
                    }
                    if (!nextTab) continue;
                    var clickTarget = nextTab.querySelector('a, button, span') || nextTab;
                    var name = subTaskLabel(nextTab);
                    // 名字为空说明又落回了装饰性节点，宁可返回 null 让上层走目录树，
                    // 也不能返回一个点了没反应的假目标把整个流程卡死。
                    if (!name) continue;
                    return { element: clickTarget, name: name, tabs: tabs };
                }
            }
        }
    } catch { /* 忽略 */ }
    return null;
}

// 点击课时子任务标签，并等待它真的生效。
function switchSubTaskTab(studyWindow, nextTab, onGiveUp) {
    var before = nextTab && nextTab.tabs ? getActiveSubTaskText(nextTab.tabs) : '';
    var cardsBefore = (typeof getStudyCardsDocument === 'function') ? getStudyCardsDocument(studyWindow) : null;
    function doClick() {
        var el = nextTab.element;
        var p = el ? el.parentElement : null;
        try {
            var evt = new MouseEvent('click', { bubbles: true, cancelable: true, view: studyWindow });
            el.dispatchEvent(evt);
        } catch { /* 忽略 */ }
        try {
            if (typeof ne21HumanClick === 'function') ne21HumanClick(el); else el.click();
        } catch { /* 忽略 */ }
        try { el.click(); } catch { /* 忽略 */ }
        if (p && p !== el) {
            try { p.click(); } catch { /* 忽略 */ }
            try {
                var pEvt = new MouseEvent('click', { bubbles: true, cancelable: true, view: studyWindow });
                p.dispatchEvent(pEvt);
            } catch { /* 忽略 */ }
        }
        var innerA = el && el.querySelector && el.querySelector('a, button, span');
        if (innerA && innerA !== el) {
            try { innerA.click(); } catch { /* 忽略 */ }
        }
        try {
            if (studyWindow && studyWindow.$ && typeof studyWindow.$(el).trigger === 'function') {
                studyWindow.$(el).trigger('click');
                if (p) studyWindow.$(p).trigger('click');
            }
        } catch { /* 忽略 */ }
    }
    try { doClick(); } catch { return Promise.resolve(false); }

    // 同页切换通常是同步的：类名与内容立刻就换。先同步确认一次，省掉一轮等待。
    if (before && getActiveSubTaskText(nextTab.tabs) !== before) return Promise.resolve(true);

    return new Promise(function (resolve) {
        var waited = 0;
        var iv = studyWindow.setInterval(function () {
            waited += 200;
            var now = getActiveSubTaskText(nextTab.tabs);
            if (now && now !== before) {
                studyWindow.clearInterval(iv);
                resolve(true);
                return;
            }
            // 兜底也走一遍：有些页面切标签不换 active 类名，但会替换卡片文档
            var cardsNow = (typeof getStudyCardsDocument === 'function') ? getStudyCardsDocument(studyWindow) : null;
            if (cardsBefore && cardsNow && cardsNow !== cardsBefore) {
                studyWindow.clearInterval(iv);
                resolve(true);
                return;
            }
            if (waited >= 2000) {
                studyWindow.clearInterval(iv);
                resolve(false);
            }
        }, 200);
    }).then(function (ok) {
        if (!ok && typeof onGiveUp === 'function') {
            try { onGiveUp(); } catch { /* 忽略 */ }
        }
        return ok;
    });
}

function advanceCurrentOrNextTask(studyWindow) {
    var sw = studyWindow || (typeof getStudyWindow === "function" ? getStudyWindow() : (window.top || window));
    if (!sw) return false;

    // 清除阻塞锁
    try {
        sw._gptJsNextPagePending = null;
        if (window.top) window.top._gptJsNextPagePending = null;
    } catch { /* 忽略 */ }

    // 步骤 1：优先检查同课时内是否有未完成的下一个子任务标签（如从 1 视频 切到 2 章节测验）
    var nextTab = findNextSubTaskTab(sw);
    if (nextTab && nextTab.element) {
        logger("正在自动切换至课时下一任务点：【" + (nextTab.name || "下一任务") + "】", "blue");
        try {
            switchSubTaskTab(sw, nextTab, function () {
                if (typeof toNext === 'function') toNext();
            });
        } catch { /* 忽略 */ }
        return true;
    }

    // 步骤 2：若无子任务标签，优先使用页面现有的“下一页”或“下一节”按钮
    var nextBtn = sw.document.querySelector('#mainid .prev_next.next, .jb_btn.next, .next_title, a[title="下一页"], .next_chapter, #nextChapter, a[title="下一节"]');
    if (nextBtn) {
        logger("正在通过页面入口切换至下一节...", "blue");
        try {
            if (typeof ne21HumanClick === "function") ne21HumanClick(nextBtn); else nextBtn.click();
            try { nextBtn.click(); } catch { /* 忽略 */ }
            return true;
        } catch { /* 忽略 */ }
    }

    // 步骤 3：通过目录树直达下一未完成小节
    var nextUnfinished = (typeof findNextUnfinishedSection === "function") ? findNextUnfinishedSection(sw) : null;
    if (nextUnfinished && nextUnfinished.element) {
        var clickTarget = nextUnfinished.element.querySelector('.posCatalog_name, .posCatalog_select, a') || nextUnfinished.element;
        if (clickTarget) {
            logger("正在直达下一未完成小节：【" + nextUnfinished.name + "】", "blue");
            try {
                if (typeof ne21HumanClick === "function") ne21HumanClick(clickTarget); else clickTarget.click();
                try { clickTarget.click(); } catch { /* 忽略 */ }
                return true;
            } catch { /* 忽略 */ }
        }
    }

    // 步骤 4：兜底调用 toNext
    var navFn = (typeof toNext === "function") ? toNext : null;
    if (navFn) {
        navFn(true);
        return true;
    }
    return false;
}

// 自动拦截并处理“章节笔记未保存”提示弹窗
// ==========================================
function autoHandleChapterNoteModal() {
    if (typeof checkChaoxingCaptcha === "function" && checkChaoxingCaptcha()) return false;
    try {
        var topWin = window;
        try { if (window.top) topWin = window.top; } catch { /* 忽略 */ }
        var now = Date.now();
        // 严格 6 秒防抖冷却，坚决杜绝高频连击与网络轰炸
        if (topWin._gptLastNoteHandledTime && (now - topWin._gptLastNoteHandledTime < 6000)) {
            return false;
        }

        var docs = getAllAccessibleDocuments();
        for (var dIdx = 0; dIdx < docs.length; dIdx++) {
            var doc = docs[dIdx];
            var bodyText = "";
            try { bodyText = (doc.body ? doc.body.innerText : "") || ""; } catch { continue; }
            if (!bodyText.includes("笔记") || (!bodyText.includes("保存") && !bodyText.includes("未保存"))) {
                continue;
            }

            var containers = doc.querySelectorAll('.popDiv, .maskDiv, .dialog, div[class*="dialog"], div[class*="modal"], div[class*="pop"], div[class*="box"], div[class*="tip"], div[class*="layer"], .layui-layer, .el-message-box, div');
            for (var cIdx = 0; cIdx < containers.length; cIdx++) {
                var el = containers[cIdx];
                if (el === doc.body || el === doc.documentElement) continue;
                // 同一弹窗元素仅处理一次，杜绝重复捕获同一个 DOM
                if (el.getAttribute("data-gpt-note-handled") === "true") continue;

                var text = "";
                try { text = (el.innerText || "").replace(/\s+/g, ""); } catch { continue; }
                if (text.includes("章节笔记未保存") || (text.includes("笔记") && text.includes("是否保存"))) {
                    el.setAttribute("data-gpt-note-handled", "true");
                    var buttons = el.querySelectorAll('a, button, span, input, div[role="button"]');
                    var saveBtn = null;
                    var noSaveBtn = null;

                    for (var b = 0; b < buttons.length; b++) {
                        var bText = (buttons[b].innerText || buttons[b].value || "").trim();
                        if (bText === "保存" || bText === "确认保存" || bText === "确定") {
                            saveBtn = buttons[b];
                        } else if (bText === "不保存" || bText === "放弃" || bText === "取消") {
                            noSaveBtn = buttons[b];
                        }
                    }

                    topWin._gptNoteHandleAttempts = (topWin._gptNoteHandleAttempts || 0) + 1;
                    topWin._gptLastNoteHandledTime = now;

                    // 核心递进防死锁机制：
                    // 第 1 次优先点击【保存】；如果短时间内同一弹窗被超星再次弹出（第 2 次），说明保存接口被卡或重复拦截，立即点击【不保存】直接放行跳转，彻底斩断死循环！
                    var targetBtn = (topWin._gptNoteHandleAttempts >= 2 && noSaveBtn) ? noSaveBtn : (saveBtn || noSaveBtn);
                    var actionLabel = (targetBtn === noSaveBtn) ? "不保存" : "保存";

                    if (targetBtn) {
                        logger("检测到章节笔记未保存提示，自动点击【" + actionLabel + "】放行", "green");
                        try {
                            if (typeof ne21HumanClick === "function") {
                                ne21HumanClick(targetBtn);
                            } else {
                                targetBtn.click();
                            }
                            try { targetBtn.click(); } catch { /* 忽略 */ }
                        } catch (clickErr) {
                            console.error("[GPTJs] 点击" + actionLabel + "按钮异常:", clickErr);
                        }

                        // 立即解除任何现存的切页单例锁与阻塞标记
                        try {
                            var sw = (typeof getStudyWindow === "function") ? getStudyWindow() : (window.top || window);
                            if (sw) sw._gptJsNextPagePending = null;
                            if (window.top) window.top._gptJsNextPagePending = null;
                        } catch { /* 忽略 */ }

                        // 弹窗处理后等待 1.5 秒（待草稿保存完毕且弹窗完全关闭），自动推进至下一任务
                        setTimeout(function () {
                            try {
                                advanceCurrentOrNextTask(topWin);
                            } catch (advErr) {
                                console.error("[GPTJs] 弹窗处理后推进异常:", advErr);
                            }
                        }, 1500);
                        return true;
                    }
                }
            }
        }
    } catch { /* 忽略 */ }
    return false;
}

// ==========================================
// 空闲任务自动推进守护（防高频风控、单例且仅在顶层窗口运行）
// ==========================================
var _idleStuckCount = 0;
var _lastIdleAdvanceTime = 0;

function checkAndResumeIdleStudy() {
    // 1. 严格单例：仅在顶层窗口运行，杜绝多 iframe 并发轰炸
    if (window !== window.top) return;

    if (localStorage.getItem("GPTJsSetting.isPaused") === "true") {
        _idleStuckCount = 0;
        return;
    }
    // 2. 优先拦截处理章节笔记未保存弹窗
    if (autoHandleChapterNoteModal()) {
        _idleStuckCount = 0;
        return;
    }

    // 3. 检查是否有 9010 验证码
    if (typeof checkChaoxingCaptcha === "function" && checkChaoxingCaptcha()) {
        _idleStuckCount = 0;
        return;
    }

    var now = Date.now();
    // 4. 全局 20 秒冷却，严禁短时间内连续触发切页或刷新
    if (now - _lastIdleAdvanceTime < 20000) {
        return;
    }

    var studyWindow = window;
    var cardsDoc = (typeof getStudyCardsDocument === "function") ? getStudyCardsDocument(studyWindow) : null;

    // 5. 检查卡片 iframe 中是否存在正在播放的音视频
    if (cardsDoc) {
        var mediaList = cardsDoc.querySelectorAll("video, audio");
        for (var m = 0; m < mediaList.length; m++) {
            var med = mediaList[m];
            if (!med.paused && !med.ended && med.currentTime > 0) {
                _idleStuckCount = 0;
                return;
            }
        }
    }

    // 6. 检查当前是否在考试/作业做题中
    var path = window.location.pathname;
    if (path.includes("/exam/") || path.includes("/work/dowork")) {
        _idleStuckCount = 0;
        return;
    }

    // 7. 严密判断当前小节是否真正处于“任务已完成且停滞”状态
    // 注意：严禁去扫描全局目录树的历史 .icon_Completed！只看当前 cardsDoc
    var isCurrentFinished = false;
    if (cardsDoc) {
        // 卡片内任务队列已经消费完
        if (cardsDoc.defaultView && Array.isArray(cardsDoc.defaultView._mlist) && cardsDoc.defaultView._mlist.length === 0) {
            isCurrentFinished = true;
        }
        // 卡片内的视频已经播放结束
        var cMedia = cardsDoc.querySelector("video, audio");
        if (cMedia && (cMedia.ended || (isFinite(cMedia.duration) && cMedia.duration >= 3 && cMedia.currentTime >= cMedia.duration - 1))) {
            isCurrentFinished = true;
        }
        // 卡片内显式显示了“任务点已完成”图标
        if (cardsDoc.querySelector(".ans-job-finished, .job-finished")) {
            isCurrentFinished = true;
        }
    }

    if (isCurrentFinished) {
        _idleStuckCount++;
        // 需连续 3 次巡检（6秒 * 3 = 18秒）持续静止无动作，才触发一次温和自愈推进
        if (_idleStuckCount >= 3) {
            _idleStuckCount = 0;
            _lastIdleAdvanceTime = now;
            try {
                studyWindow._gptJsNextPagePending = null;
            } catch { /* 忽略 */ }

            logger("检测到当前任务点已完成，正在自动推进至下一任务...", "blue");
            advanceCurrentOrNextTask(studyWindow);
        }
    } else {
        _idleStuckCount = 0;
    }
}

// 仅在顶层窗口启动低频自愈巡检（每 6000ms 一次）
try {
    if (window === window.top) {
        setInterval(function () {
            autoHandleChapterNoteModal();
            checkAndResumeIdleStudy();
        }, 6000);
    } else {
        // 子 iframe 仅负责高频捕获弹窗，绝不运行切页推进
        setInterval(autoHandleChapterNoteModal, 2500);
    }
} catch { /* 忽略 */ }

// ==========================================
// 全课程目录树未完成小节探测与跨章节直达跳转
// ==========================================
// 取"当前所在小节"的标识集合。
// 用来判断目录树即将返回的目标是不是我们此刻就站在上面的那一节 ——
// 自指时会形成"点了等于没点"的无限循环。
function getCurrentSectionKeys(studyWindow) {
    var keys = [];
    function add(v) {
        v = String(v == null ? '' : v).replace(/^cur/, '').trim();
        if (v && keys.indexOf(v) === -1) keys.push(v);
    }
    try {
        if (typeof _defaults !== 'undefined' && _defaults) {
            add(_defaults['knowledgeid']);
            add(_defaults['chapterId']);
            add(_defaults['courseid']);
        }
    } catch { /* 忽略 */ }
    try {
        if (studyWindow && studyWindow._defaults) {
            add(studyWindow._defaults['knowledgeid']);
            add(studyWindow._defaults['chapterId']);
        }
    } catch { /* 忽略 */ }
    try {
        var swSearch = String((studyWindow && studyWindow.location && studyWindow.location.search) || '');
        var m1 = swSearch.match(/(?:knowledgeid|chapterid|nodeid)=([^&]+)/i);
        if (m1) add(decodeURIComponent(m1[1]));
    } catch { /* 忽略 */ }
    try {
        var wSearch = String(window.location.search || '');
        var m2 = wSearch.match(/(?:knowledgeid|chapterid|nodeid)=([^&]+)/i);
        if (m2) add(decodeURIComponent(m2[1]));
    } catch { /* 忽略 */ }
    try {
        var an = (studyWindow && studyWindow.document) ? studyWindow.document.querySelector('.posCatalog_active, #coursetree li.active, .course_tree li.active, #coursetree .cur, .course_tree .cur') : null;
        if (an) {
            var sel = an.classList.contains('posCatalog_select') ? an : an.querySelector('.posCatalog_select');
            if (sel && sel.id) add(sel.id);
            if (an.id) add(an.id);
            var anName = (an.querySelector('.posCatalog_name')?.getAttribute('title') || an.querySelector('.posCatalog_name')?.innerText || an.innerText || '').split('\n')[0].replace(/^\d+(?:\.\d+)*\s*/, '').trim();
            if (anName && anName.length >= 2) add(anName);
        }
    } catch { /* 忽略 */ }
    try {
        var hTitle = (studyWindow && studyWindow.document) ? (studyWindow.document.querySelector('#mainid h1, .chapter_title, .prev_title, .content_title')?.innerText || '').split('\n')[0].replace(/^\d+(?:\.\d+)*\s*/, '').trim() : '';
        if (hTitle && hTitle.length >= 2) add(hTitle);
    } catch { /* 忽略 */ }
    return keys;
}

function findNextUnfinishedSection(studyWindow) {
    try {
        var doc = studyWindow.document;
        var tree = doc.querySelector('#coursetree') || doc.querySelector('.course_tree') || doc.querySelector('.units') || doc;
        var nodes = tree.querySelectorAll('li, .posCatalog_level, .posCatalog_select');
        var items = [];

        for (var i = 0; i < nodes.length; i++) {
            var item = nodes[i];
            var sel = item.classList.contains('posCatalog_select') ? item : item.querySelector('.posCatalog_select');
            var curid = (sel && sel.id) || item.id || '';
            if (!curid || !curid.includes('cur')) continue;

            var text = item.innerText || '';
            if (text.includes('未开放') || text.includes('待开放') || text.includes('闯关')) continue;

            // 判断完成状态：有完成图标则为已完成，有待完成标识/任务点计数 > 0 则为未完成
            var isFinished = false;
            if (item.querySelector('.icon_Completed, .jobComplete, .icon_success')) {
                isFinished = true;
            }
            var tips = (item.querySelector('.prevHoverTips')?.innerText || '').trim();
            var pointsBadge = (item.querySelector('.catalog_points_count, .jobUnfinishCount, .orange, .posCatalog_points')?.innerText || '').trim();

            if (tips.includes('待完成') || tips.includes('未完成') || tips.includes('未做')) {
                isFinished = false;
            } else if (/^[1-9]\d*$/.test(pointsBadge)) {
                isFinished = false;
            } else if (tips.includes('已完成') || pointsBadge === '0') {
                isFinished = true;
            }

            var isActive = item.classList.contains('posCatalog_active') || !!item.querySelector('.posCatalog_active');
            var name = item.querySelector('.posCatalog_name')?.getAttribute('title') || item.querySelector('.posCatalog_name')?.innerText || text.split('\n')[0].trim();

            items.push({
                element: sel || item,
                curid: curid,
                name: name,
                isFinished: isFinished,
                isActive: isActive
            });
        }

        if (!items.length) return null;

        // 当前所在小节的标识：任何一条返回路径都必须避开它。
        var selfKeys = getCurrentSectionKeys(studyWindow);
        function isSelf(it) {
            for (var k = 0; k < selfKeys.length; k++) {
                if (!selfKeys[k]) continue;
                var el = it.element;
                var elId = '';
                try { elId = String((el && el.id) || '').replace(/^cur/, '').trim(); } catch { /* 忽略 */ }
                var curidClean = String(it.curid || '').replace(/^cur/, '').trim();
                if (curidClean === selfKeys[k]) return true;
                if (elId === selfKeys[k]) return true;
                if (it.name) {
                    var itNameClean = String(it.name).split('\n')[0].replace(/^\d+(?:\.\d+)*\s*/, '').trim();
                    if (itNameClean === selfKeys[k]) return true;
                    if (itNameClean.length >= 4 && (itNameClean.includes(selfKeys[k]) || selfKeys[k].includes(itNameClean))) return true;
                }
            }
            return false;
        }

        var activeIdx = items.findIndex(function (it) { return it.isActive || isSelf(it); });
        // 1. 优先从当前小节之后往后找第一个未完成的小节
        if (activeIdx >= 0) {
            for (var a = activeIdx + 1; a < items.length; a++) {
                if (!items[a].isFinished && !isSelf(items[a])) return items[a];
            }
        }

        // 2. 如果后续全部完成，从头找整个课程未完成的小节（防止前面有漏刷小节）
        for (var b = 0; b < items.length; b++) {
            if (!items[b].isFinished && !items[b].isActive && !isSelf(items[b])) return items[b];
        }
    } catch (e) {
        console.error('[GPTJs] 探测未完成章节异常:', e);
    }
    return null;
}

// ==========================================
// 后台切页自愈守护（防止切屏或后台挂起导致视频完播后卡死）
// ==========================================
var _navWatchdogTimer = null;

function stopNavigationWatchdog(studyWindow) {
    try {
        var w = studyWindow || (typeof getStudyWindow === 'function' ? getStudyWindow() : window);
        if (w) {
            if (w._navWatchdogTimer) {
                w.clearTimeout(w._navWatchdogTimer);
                w.clearInterval(w._navWatchdogTimer);
                w._navWatchdogTimer = null;
            }
            w._lastNavTriggerTime = 0;
        }
        if (window.top && window.top !== w) {
            if (window.top._navWatchdogTimer) {
                window.top.clearTimeout(window.top._navWatchdogTimer);
                window.top.clearInterval(window.top._navWatchdogTimer);
                window.top._navWatchdogTimer = null;
            }
            window.top._lastNavTriggerTime = 0;
        }
        if (_navWatchdogTimer) {
            clearTimeout(_navWatchdogTimer);
            clearInterval(_navWatchdogTimer);
            _navWatchdogTimer = null;
        }
    } catch { /* 忽略 */ }
}

function startNavigationWatchdog(studyWindow) {
    if (!studyWindow) return;
    // 启动前先清除已存在的守护，确保每次切页只有一个单次守护
    stopNavigationWatchdog(studyWindow);

    var startChapterId = "";
    try { startChapterId = studyWindow.document.querySelector(".posCatalog_active")?.id || ""; } catch { /* 忽略 */ }
    var startCardsDoc = (typeof getStudyCardsDocument === "function") ? getStudyCardsDocument(studyWindow) : null;
    studyWindow._lastNavTriggerTime = Date.now();

    // 采用单次有限延迟（15 秒）安全守护，杜绝 setInterval 无限重复点击打断视频播放
    studyWindow._navWatchdogTimer = studyWindow.setTimeout(function () {
        try {
            studyWindow._navWatchdogTimer = null;
            _navWatchdogTimer = null;
            if (localStorage.getItem("GPTJsSetting.isPaused") === "true") return;

            // 1. 检查当前是否已有新页面或媒体正在正常播放中
            var currentCardsDoc = (typeof getStudyCardsDocument === "function") ? getStudyCardsDocument(studyWindow) : null;
            if (currentCardsDoc) {
                // 如果当前卡片文档中存在音视频且未结束，说明新页面视频已开播，坚决退出
                var media = currentCardsDoc.querySelector("video, audio");
                if (media && (!media.paused || !media.ended || media.currentTime > 0)) {
                    return;
                }
                // 如果子 iframe 存在活动任务队列，坚决退出
                if (currentCardsDoc.defaultView && currentCardsDoc.defaultView._mlist && currentCardsDoc.defaultView._mlist.length > 0) {
                    return;
                }
                // 如果卡片文档与触发切页时不同，说明切页已成功加载新页面
                if (startCardsDoc && currentCardsDoc !== startCardsDoc) {
                    return;
                }
            }

            // 2. 检查目录树：若活跃小节已经改变，说明切页早已生效
            var curChapterId = "";
            try { curChapterId = studyWindow.document.querySelector(".posCatalog_active")?.id || ""; } catch { /* 忽略 */ }
            if (startChapterId && curChapterId && curChapterId !== startChapterId) {
                return;
            }

            // 3. 确实停留在原处超时无响应（切屏挂起或漏点），才尝试触发一次自愈重试
            autoHandleChapterNoteModal();
            studyWindow._gptJsNextPagePending = null;
            if (window.top) window.top._gptJsNextPagePending = null;
            logger("后台切页自愈守护：检测到任务已完成但页面未跳转，正在自动重试下一节...", "orange");

            // 优先目录树直达
            var retryUnfinished = (typeof findNextUnfinishedSection === "function") ? findNextUnfinishedSection(studyWindow) : null;
            if (retryUnfinished && retryUnfinished.element) {
                var target = retryUnfinished.element.querySelector(".posCatalog_name, .posCatalog_select, a") || retryUnfinished.element;
                if (target) {
                    if (typeof ne21HumanClick === "function") ne21HumanClick(target); else target.click();
                    try { target.click(); } catch { /* 忽略 */ }
                    logger("自愈守护已直达：【" + retryUnfinished.name + "】", "blue");
                    return;
                }
            }
            // 顺序下一节入口重试
            var nextBtn = studyWindow.document.querySelector('#mainid .prev_next.next, .jb_btn.next, .next_title, .next_chapter, #nextChapter, a[title="下一节"]');
            if (nextBtn) {
                if (typeof ne21HumanClick === "function") ne21HumanClick(nextBtn); else nextBtn.click();
                try { nextBtn.click(); } catch { /* 忽略 */ }
            }
        } catch (watchErr) {
            console.error("[GPTJs] 自愈守护跳转异常:", watchErr);
        }
    }, 15000);
}

// 点击“下一章节”。必须是顶层函数而不能定义在 toNext 的闭包里 ——
// scheduleStudyNavigation 的 runFallbackOnce 在点击子任务标签失败时也要走它，
// 放在闭包里那一处会直接 ReferenceError（又被 catch 吞掉，表现为"什么都没发生"）。
function clickNextChapterBtn(studyWindow) {
    $('#ne-21log', window.parent.document).html('')
    try { studyWindow._gptJsJumpAllowed = true; } catch { /* empty */ }
    autoHandleChapterNoteModal();
    var nextBtn = studyWindow.document.querySelector('#mainid .prev_next.next, .jb_btn.next, .next_title, .next_chapter, #nextChapter, a[title="下一节"]');
    if (nextBtn) {
        if (typeof ne21HumanClick === 'function') ne21HumanClick(nextBtn); else nextBtn.click();
        return true;
    }
    var focusBtn = studyWindow.document.querySelector('#prevNextFocusNext');
    if (focusBtn) {
        if (typeof ne21HumanClick === 'function') ne21HumanClick(focusBtn); else focusBtn.click();
        return true;
    }
    // 目录树兜底直达
    var nextUnfinished = findNextUnfinishedSection(studyWindow);
    if (nextUnfinished && nextUnfinished.element) {
        var clickTarget = nextUnfinished.element.querySelector('.posCatalog_name, .posCatalog_select, a') || nextUnfinished.element;
        if (clickTarget) {
            if (typeof ne21HumanClick === 'function') ne21HumanClick(clickTarget); else clickTarget.click();
            logger('已通过目录树直达下一未完成小节：【' + nextUnfinished.name + '】', 'blue');
            return true;
        }
    }
    logger('未找到下一章节入口，本次不切换', 'orange');
    return false;
}

// 探测当前章节内的“下一页”分页按钮（与跨章节的“下一节”区分开）
function findChapterNextPageBtn(studyWindow) {
    try {
        var doc = studyWindow.document;
        var btns = doc.querySelectorAll('a[title*="下一页"], button[title*="下一页"], .next_title, #mainid .prev_next.next, .jb_btn.next');
        for (var i = 0; i < btns.length; i++) {
            var btn = btns[i];
            if (!isRenderedEl(btn)) continue;
            var title = (btn.getAttribute('title') || '').trim();
            var text = (btn.innerText || btn.textContent || '').trim();
            // 严禁将“下一节 / 下一章”当成“下一页”
            if (title.includes('下一节') || title.includes('下一章') || text.includes('下一节') || text.includes('下一章')) {
                continue;
            }
            if (title.includes('下一页') || text.includes('下一页') || (btn.classList.contains('prev_next') && btn.classList.contains('next'))) {
                return btn;
            }
        }
    } catch { /* 忽略 */ }
    return null;
}

// 深度核验当前小节任务点是否真正全部完成（防漏做、防过早跳转）
function isCurrentSectionFinished(studyWindow) {
    try {
        var doc = studyWindow.document;
        // 1. 优先检查左侧目录树当前活跃小节状态
        var curSection = doc.querySelector('.posCatalog_active');
        if (!curSection) {
            var selfKeys = (typeof getCurrentSectionKeys === 'function') ? getCurrentSectionKeys(studyWindow) : [];
            if (selfKeys && selfKeys.length) {
                var allItems = doc.querySelectorAll('li, .posCatalog_level, .posCatalog_select');
                for (var i = 0; i < allItems.length; i++) {
                    var el = allItems[i];
                    var elId = String(el.id || '').replace(/^cur/, '');
                    var selEl = el.classList.contains('posCatalog_select') ? el : el.querySelector('.posCatalog_select');
                    var selId = selEl ? String(selEl.id || '').replace(/^cur/, '') : '';
                    for (var k = 0; k < selfKeys.length; k++) {
                        if (selfKeys[k] && (elId === selfKeys[k] || selId === selfKeys[k])) {
                            curSection = el;
                            break;
                        }
                    }
                    if (curSection) break;
                }
            }
        }
        if (curSection) {
            var tips = (curSection.querySelector('.prevHoverTips')?.innerText || '').trim();
            var pointsBadge = (curSection.querySelector('.catalog_points_count, .jobUnfinishCount, .orange, .posCatalog_points')?.innerText || '').trim();
            var hasCompletedIcon = !!curSection.querySelector('.icon_Completed, .jobComplete, .icon_success');

            // 明确有待完成任务点计数（如 "1", "2"）
            if (/^[1-9]\d*$/.test(pointsBadge)) return false;
            // 明确提示未完成/待完成
            if (tips.includes('待完成') || tips.includes('未完成') || tips.includes('未做')) return false;
            // 明确有完成图标，或提示已完成，或任务点为 0
            if (hasCompletedIcon || tips.includes('已完成') || pointsBadge === '0') return true;
        }

        // 2. 检查当前卡片文档内部 DOM
        var cardsDoc = (typeof getStudyCardsDocument === 'function') ? getStudyCardsDocument(studyWindow) : null;
        if (cardsDoc) {
            // 是否存在尚未播放完毕的音视频
            var mediaList = cardsDoc.querySelectorAll('video, audio');
            for (var m = 0; m < mediaList.length; m++) {
                var med = mediaList[m];
                if (!med.ended && isFinite(med.duration) && med.duration > 0 && med.currentTime < (med.duration - 1)) {
                    return false;
                }
            }
            // 是否存在黄色未完成任务点图标（且没有完成对勾）
            var uncompletedIcons = cardsDoc.querySelectorAll('.ans-job-icon:not(.ans-job-finished), .ans-attach-ct .ans-job-icon');
            if (uncompletedIcons.length > 0) {
                var hasUnfinished = false;
                for (var uj = 0; uj < uncompletedIcons.length; uj++) {
                    var uic = uncompletedIcons[uj];
                    if (!uic.classList.contains('ans-job-finished') && !uic.classList.contains('jobComplete') && !uic.classList.contains('icon_success')) {
                        hasUnfinished = true;
                        break;
                    }
                }
                if (hasUnfinished) return false;
            }
        }
    } catch { /* 忽略 */ }
    return true;
}

function toNext(noTasks) {
    var studyWindow = getStudyWindow();
    // ==========================================================
    // 推进有效性检查（防"原地循环"的最后一道保险）
    //
    // 线上故障现象：自动看课跑一段时间后，日志区开始反复刷同样几行
    // （跳到某小节 → 视频已完成 → 任务处理完毕 → 又跳回同一小节），
    // 任务永远不往下走。根因是目录树把"当前所在小节"当成了未完成项返回。
    //
    // findNextUnfinishedSection 已经排除了自指，但这里再兜一层：
    // 连续多次推进都没能让活跃小节发生变化，就主动停手并说明原因，
    // 而不是无限刷日志、无限点目录树（那本身也会招风控）。
    // ==========================================================
    try {
        var curCh = '';
        try { curCh = studyWindow.document.querySelector('.posCatalog_active')?.id || ''; } catch { /* 忽略 */ }
        if (curCh && studyWindow._gptJsLastNavChapter === curCh) {
            studyWindow._gptJsNavNoProgress = (studyWindow._gptJsNavNoProgress || 0) + 1;
        } else {
            studyWindow._gptJsNavNoProgress = 0;
        }
        studyWindow._gptJsLastNavChapter = curCh;
        if (studyWindow._gptJsNavNoProgress >= 3) {
            logger('⛔ 连续 ' + studyWindow._gptJsNavNoProgress + ' 次推进后仍停在同一小节，已停止自动跳转。' +
                '该小节可能被目录树判为未完成（常见于任务点已看完但章节状态未刷新），' +
                '请手动进入下一小节，或刷新页面让目录树重新加载。', 'red');
            return;
        }
    } catch { /* 探测失败不阻断主流程 */ }

    try {
        studyWindow._lastNavTriggerTime = Date.now();
        startNavigationWatchdog(studyWindow);
    } catch { /* 忽略 */ }
    // 每次跳转前把 checkJob 守护拉起来：它在课程跑完后会自停（见 60-entry-dispatch.js），
    // 而新一轮跨章节跳转同样需要它拦住超星的"未保存笔记"提示。
    try { if (typeof ensureCheckJobGuard === 'function') ensureCheckJobGuard(); } catch { /* 忽略 */ }
    // 已被替换的 cards 文档中的异步回调不能继续驱动新章节。
    var activeCardsDoc = getStudyCardsDocument(studyWindow); if (_l.pathname.includes('/knowledge/cards') && activeCardsDoc && activeCardsDoc !== _d) return;
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(function () { toNext(noTasks); }, 3000);
        return;
    }

    // 核心流转步骤 1：优先检测并切换同课时下一任务点标签（如从“1 视频”切到“2 章节测验”）
    // 原地切换子任务标签不仅零网络延迟，而且根本不会触发离开页面的“未保存笔记”拦截！
    var nextTab = (typeof findNextSubTaskTab === 'function') ? findNextSubTaskTab(studyWindow) : null;
    if (nextTab && nextTab.element) {
        logger('检测到本课时下一任务点：【' + (nextTab.name || '下一任务') + '】，正在自动切换...', 'blue');
        scheduleStudyNavigation(studyWindow, function () {
            autoHandleChapterNoteModal();
            return switchSubTaskTab(studyWindow, nextTab);
        });
        return;
    }

    // 核心流转步骤 2：若无子任务标签，检查当前课时内是否有“下一页”分页按钮（同章节多页推进，避免漏刷）
    var nextPageBtn = (typeof findChapterNextPageBtn === 'function') ? findChapterNextPageBtn(studyWindow) : null;
    if (nextPageBtn) {
        logger('检测到本课时尚有未完成页面，正在翻至下一页...', 'blue');
        scheduleStudyNavigation(studyWindow, function () {
            autoHandleChapterNoteModal();
            try { studyWindow._gptJsJumpAllowed = true; } catch { /* empty */ }
            if (typeof ne21HumanClick === 'function') ne21HumanClick(nextPageBtn); else nextPageBtn.click();
            try { nextPageBtn.click(); } catch { /* 忽略 */ }
            return true;
        });
        return;
    }

    // 核心流转步骤 3：当前页面已无更多标签与翻页。在真正跨章节跳出前，对当前小节执行“完成性深度核验门禁”：
    var isDone = (typeof isCurrentSectionFinished === 'function') ? isCurrentSectionFinished(studyWindow) : true;
    if (!isDone) {
        studyWindow._gptJsSectionVerifyWait = (studyWindow._gptJsSectionVerifyWait || 0) + 1;
        if (studyWindow._gptJsSectionVerifyWait <= 2) {
            logger('当前小节任务点未全部确认完成或状态同步中（第 ' + studyWindow._gptJsSectionVerifyWait + ' 次核验），等待状态同步...', 'orange');
            setTimeout(function () {
                if (typeof refreshCourseList === 'function') {
                    refreshCourseList().catch(function () { /* 忽略 */ });
                }
                toNext(noTasks);
            }, 2500);
            return;
        }
        studyWindow._gptJsSectionVerifyWait = 0;
        logger('⚠️ 当前小节仍有部分任务点未完成（可能需手动参与或等待教师批阅），为防止脚本卡死，继续推进至下一未完成章节...', 'orange');
    } else {
        studyWindow._gptJsSectionVerifyWait = 0;
    }

    // 核心流转步骤 4：确认当前章节已无任务点可做，准备切换至下一章节
    if (noTasks === true || setting.review || !setting.work) {
        logger(noTasks === true ? '当前小节已无未完成任务，准备切换至下一章节' : '复习模式或免做模式，准备切换至下一章节', 'blue');
        var quickNext = (typeof findNextUnfinishedSection === 'function') ? findNextUnfinishedSection(studyWindow) : null;
        if (quickNext && quickNext.element) {
            scheduleStudyNavigation(studyWindow, function () {
                autoHandleChapterNoteModal();
                var clickTarget = quickNext.element.querySelector('.posCatalog_name, .posCatalog_select, a') || quickNext.element;
                if (clickTarget) {
                    if (typeof ne21HumanClick === 'function') ne21HumanClick(clickTarget); else clickTarget.click();
                    try { clickTarget.click(); } catch { /* 忽略 */ }
                    return true;
                }
                return clickNextChapterBtn(studyWindow);
            });
            return;
        }
        scheduleStudyNavigation(studyWindow, function () { return clickNextChapterBtn(studyWindow); });
        return;
    }

    // 核心流转步骤 5：刷新目录并从目录树中定位下一个未完成小节，实现精准跨章节直达
    var courseList = refreshCourseList().catch(function (error) {
        logger(error.message + '，使用页面目录继续处理', 'orange');
        return studyWindow.document.querySelector('#coursetree');
    });
    courseList.then(() => {
        var activeCardsDoc = getStudyCardsDocument(studyWindow); if (_l.pathname.includes('/knowledge/cards') && activeCardsDoc && activeCardsDoc !== _d) return;

        autoHandleChapterNoteModal();

        var nextUnfinished = findNextUnfinishedSection(studyWindow);
        if (nextUnfinished && nextUnfinished.element) {
            logger('检测到未完成小节：【' + nextUnfinished.name + '】，准备自动跳转开始看课', 'blue');
            scheduleStudyNavigation(studyWindow, function () {
                autoHandleChapterNoteModal();
                var clickTarget = nextUnfinished.element.querySelector('.posCatalog_name, .posCatalog_select, a') || nextUnfinished.element;
                if (clickTarget) {
                    if (typeof ne21HumanClick === 'function') ne21HumanClick(clickTarget); else clickTarget.click();
                    try { clickTarget.click(); } catch { /* 忽略 */ }
                    showBox();
                    return true;
                }
                return clickNextChapterBtn(studyWindow);
            });
            return;
        }

        // 目录树未检测到时使用顺序下一节入口兜底
        logger('本课时处理完毕，准备顺序切换至下一章节', 'blue');
        scheduleStudyNavigation(studyWindow, function () {
            autoHandleChapterNoteModal();
            var clicked = clickNextChapterBtn(studyWindow);
            showBox();
            return clicked;
        });
    }).catch(function (error) {
        logger('自动切换失败：' + error.message, 'red');
    });
}


try {
    window.checkChaoxingCaptcha = checkChaoxingCaptcha;
    window.getAllAccessibleDocuments = getAllAccessibleDocuments;
    window.isCaptchaBlocked = isCaptchaBlocked;
    window.clearCaptchaBlocked = clearCaptchaBlocked;
    window.setCaptchaBlocked = setCaptchaBlocked;
    window.toNext = toNext;
    window.stopNavigationWatchdog = stopNavigationWatchdog;
    window.startNavigationWatchdog = startNavigationWatchdog;
    window.autoHandleChapterNoteModal = autoHandleChapterNoteModal;
    window.checkAndResumeIdleStudy = checkAndResumeIdleStudy;
    window.findNextSubTaskTab = findNextSubTaskTab;
    window.advanceCurrentOrNextTask = advanceCurrentOrNextTask;
    window.findChapterNextPageBtn = findChapterNextPageBtn;
    window.isCurrentSectionFinished = isCurrentSectionFinished;
    if (window.top) {
        window.top.checkChaoxingCaptcha = checkChaoxingCaptcha;
        window.top.getAllAccessibleDocuments = getAllAccessibleDocuments;
        window.top.isCaptchaBlocked = isCaptchaBlocked;
        window.top.clearCaptchaBlocked = clearCaptchaBlocked;
        window.top.setCaptchaBlocked = setCaptchaBlocked;
        window.top.toNext = toNext;
        window.top.stopNavigationWatchdog = stopNavigationWatchdog;
        window.top.startNavigationWatchdog = startNavigationWatchdog;
        window.top.autoHandleChapterNoteModal = autoHandleChapterNoteModal;
        window.top.checkAndResumeIdleStudy = checkAndResumeIdleStudy;
        window.top.findChapterNextPageBtn = findChapterNextPageBtn;
        window.top.isCurrentSectionFinished = isCurrentSectionFinished;
    }
} catch { /* 忽略 */ }

// 全局与本 Frame 守护定时器（每 1000ms 执行一次，全流程实时熔断与自愈恢复）
try {
    if (!window._gptCaptchaWatchdogId) {
        window._gptCaptchaWatchdogId = window.setInterval(function () {
            checkChaoxingCaptcha();
        }, 1000);
    }
    if (window.top && window.top !== window && !window.top._gptCaptchaWatchdogId) {
        window.top._gptCaptchaWatchdogId = window.top.setInterval(function () {
            checkChaoxingCaptcha();
        }, 1000);
    }
} catch { /* 忽略 */ }

// 用户手势响应器：用户在验证码弹窗点击“确认”或按回车提交后，迅速触发多阶段自愈检测
try {
    var onCaptchaUserInteract = function () {
        if (isCaptchaBlocked()) {
            setTimeout(checkChaoxingCaptcha, 400);
            setTimeout(checkChaoxingCaptcha, 1000);
            setTimeout(checkChaoxingCaptcha, 2200);
        }
    };
    window.addEventListener('click', onCaptchaUserInteract, true);
    window.addEventListener('keydown', onCaptchaUserInteract, true);
} catch { /* 忽略 */ }


function getSafeMissionParam(key) {
    if (typeof _defaults !== 'undefined' && _defaults && _defaults[key]) {
        return _defaults[key];
    }
    try {
        if (typeof parseUrlParams === 'function') {
            var p = parseUrlParams();
            if (p && p[key]) return p[key];
        }
    } catch { /* 忽略 */ }
    return '';
}

function missonStart() {
    try {
        if (typeof stopNavigationWatchdog === 'function') stopNavigationWatchdog();
        if (window.top && typeof window.top.stopNavigationWatchdog === 'function') window.top.stopNavigationWatchdog();
    } catch { /* 忽略 */ }
    if (typeof checkChaoxingCaptcha === 'function' && checkChaoxingCaptcha()) {
        setTimeout(missonStart, 3000);
        return;
    }
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(missonStart, 3000);
        return;
    }
    if (_mlist.length <= 0) {
        logger('此页面任务处理完毕，准备跳转页面', 'green')
        return toNext()
    }
    let _task = _mlist[0];
    let _dom = _domList[0];
    let _prop = (_task && _task['property']) || {};
    let _module = _prop['module'] || '';
    let _type = (_task && _task['type']) || _module;

    if (_type === 'video' || _type === 'insertvideo' || _module === 'insertvideo') {
        logger('开始处理视频', 'purple');
        missonVideo(_dom, _task);
    } else if (_type === 'audio' || _type === 'insertaudio' || _module === 'insertaudio') {
        logger('开始处理音频', 'purple');
        missonVideo(_dom, _task);
    } else if (_type === 'workid' || _type === 'work' || _type === 'insertwork' || _module === 'insertwork' || _type === 'quiz') {
        logger('开始处理测验', 'purple');
        missonWork(_dom, _task);
    } else if (_type === 'document' || _type === 'insertdoc' || _type === 'doc') {
        logger('开始处理文档', 'purple');
        missonDoucument(_dom, _task);
    } else if (_type === 'read') {
        logger('开始处理阅读', 'purple');
        missonRead(_dom, _task);
    } else if (_type === 'insertbook' || _type === 'book') {
        logger('开始处理读书', 'purple');
        missonBook(_dom, _task);
    } else if (_type === 'knowledgeGraph') {
        logger('开始处理知识图谱', 'purple');
        missonKnowledgeGraph(_task);
    } else {
        // 无需处理或不算任务点的占位类型：图片、答疑、分享、外链题库等
        let GarbageTasks = ['insertimage', 'insertanswerquestion', 'insertshare', 'insertquestion', 'insertdiscuss', 'insertsubject'];
        if (GarbageTasks.indexOf(_type) !== -1 || GarbageTasks.indexOf(_module) !== -1) {
            logger('发现无需处理任务（' + (_type || _module) + '），跳过。', 'red');
            switchMission();
        } else {
            logger('暂不支持处理此类型:' + (_type || _module) + '，跳过。', 'red');
            switchMission();
        }
    }
}

// 全主流浏览器内核适配版 playMedia：支持 Chrome/Edge, Firefox(Gecko), Safari(WebKit) 自动播放策略
async function playMedia(playFunction, mediaElement) {
    const tryPlayMedia = () => {
        return new Promise((resolve, reject) => {
            try {
                const playRes = playFunction();
                if (playRes && typeof playRes.then === 'function') {
                    playRes.then(resolve).catch(reject);
                } else {
                    resolve();
                }
            } catch (err) {
                reject(err);
            }
        });
    };
    try {
        await tryPlayMedia();
        return true;
    } catch (err) {
        const errStr = String(err || '');
        const errName = err && err.name;
        // 兼容全主流浏览器内核的自动播放安全拦截标识
        const isAutoplayBlocked = errName === 'NotAllowedError' ||
            errStr.includes('NotAllowedError') ||
            errStr.includes("failed because the user didn't interact") ||
            errStr.includes('not allowed by the user agent') ||
            errStr.includes('user denied permission') ||
            errStr.includes('not allowed to play');

        if (isAutoplayBlocked) {
            // 核心自愈：绝大多数浏览器内核（Chrome/Firefox/Safari）在静音状态下放行自动播放，先自动静音重试
            try {
                if (mediaElement) {
                    mediaElement.muted = true;
                    mediaElement.volume = 0;
                }
            } catch { /* 忽略 */ }
            try {
                await tryPlayMedia();
                return true;
            } catch (retryErr) {
                console.log('[GPTJs] 静音重试播放仍受限（需用户首次手势激活）:', retryErr);
            }

            // 不要用 alert()。它是同步阻塞的：一旦弹出，整个页面（含完播心跳、
            // 卡死检测、定时任务）全部停转，直到用户手动关掉；而且关掉之后
            // 这里立刻 tryPlayMedia()，用户那一下"点确定"并不是页面上的手势，
            // 自动播放大概率仍被拒 —— 提示与恢复动作完全不匹配。
            // 改为：用 logger 告知 + 挂一次性手势监听，用户点页面任意处时再尝试播放。
            const content = '由于浏览器的自动播放安全保护（新标签页或后台加载时常见），请轻点一次网页任意位置以激活播放。';
            try { logger(content, 'orange'); } catch { /* 面板未就绪 */ }

            return new Promise((resolve) => {
                let settled = false;
                const done = (ok) => {
                    if (settled) return;
                    settled = true;
                    try { document.removeEventListener('click', onGesture, true); } catch { /* 忽略 */ }
                    try { document.removeEventListener('keydown', onGesture, true); } catch { /* 忽略 */ }
                    try { document.removeEventListener('touchstart', onGesture, true); } catch { /* 忽略 */ }
                    resolve(!!ok);
                };
                function onGesture() {
                    tryPlayMedia().then(() => done(true)).catch(() => { /* 等下一次手势 */ });
                }
                try {
                    document.addEventListener('click', onGesture, true);
                    document.addEventListener('keydown', onGesture, true);
                    document.addEventListener('touchstart', onGesture, true);
                } catch { /* empty */ }
                // 兜底：20 秒内没有任何手势就放弃，交给上层切换任务，
                // 绝不让整个播放流程永久挂在一个 Promise 上。
                setTimeout(() => done(false), 20000);
            });
        } else if (errStr.includes('The element has no supported sources')) {
            logger('当前视频无法播放（无可用音视频源）。', 'red');
        } else if (errStr.includes('background media was paused') || errStr.includes('interrupted because') || errStr.includes('interrupted by a call to pause') || errStr.includes('AbortError')) {
            console.log('[GPTJs] 忽略浏览器后台播放中断/暂停:', err);
        } else {
            logger('播放视频时发生未知错误：' + errStr, 'red');
        }
        return false;
    }
}

function missonVideo(dom, obj) {
    const { isPassed } = obj || {};
    const property = (obj && obj.property) || {};
    const name = property.name || '';
    const module = property.module || (obj && obj.type) || '';

    // 同一函数处理视频与音频两种任务，按 module/type 区分日志/开关
    const isAudioTask = module === 'insertaudio' || module === 'audio' || (obj && obj.type === 'audio');
    const taskLabel = isAudioTask ? '音频' : '视频';

    if (isAudioTask ? !setting.audio : !setting.video) {
        logger(`用户设置不处理${taskLabel}任务，准备开始下一个任务。`, 'red');
        return setTimeout(switchMission, 3000);
    }

    if (!setting.review && isPassed === true) {
        logger(`${taskLabel}：${name} 检测已完成，准备处理下一个任务`, 'green');
        return switchMission();
    }

    let mediaType = isAudioTask ? 'audio' : 'video'; // 按任务类型预设，循环里再以 DOM 为准

    logger(`处理${taskLabel}：${name}，正在解析`);
    window._failedVideoQuizzes = {};
    let executed = false;
    let _parseDebugLogged = false;

    // 超时检测：超过 60 秒仍未找到媒体元素则刷新页面
    const PARSE_TIMEOUT_MS = 60 * 1000;
    const parseStartTime = Date.now();

    // 在给定的 iframe 集合（含嵌套 iframe）中搜索 video/audio 元素
    // 返回 { media, doc } 或 null
    function searchIframesForMedia(iframes) {
        for (var fi = 0; fi < iframes.length; fi++) {
            var frame = iframes[fi];
            var frameDoc;
            try {
                frameDoc = frame.contentDocument || frame.contentWindow.document;
            } catch { continue; }
            if (!frameDoc) continue;

            // 在当前 iframe 文档中查找
            var m = frameDoc.querySelector('video') || frameDoc.querySelector('audio');
            if (m) {
                // 以真实 DOM 标签为准。旧实现只在命中 audio 时赋值，于是"音频任务页里
                // 出现 video 元素"这种组合下 mediaType 仍是 'audio'，只对 video 生效的
                // 弹题检测会被无谓关掉。
                mediaType = (m.tagName.toLowerCase() === 'audio') ? 'audio' : 'video';
                return { media: m, doc: frameDoc };
            }

            // 在嵌套 iframe 中查找
            try {
                var nested = frameDoc.querySelectorAll('iframe');
                for (var ni = 0; ni < nested.length; ni++) {
                    var nDoc;
                    try { nDoc = nested[ni].contentDocument || nested[ni].contentWindow.document; } catch { continue; }
                    if (!nDoc) continue;
                    m = nDoc.querySelector('video') || nDoc.querySelector('audio');
                    if (m) {
                        mediaType = (m.tagName.toLowerCase() === 'audio') ? 'audio' : 'video';
                        return { media: m, doc: nDoc };
                    }
                }
            } catch { /* empty */ }
        }
        return null;
    }

    const intervalId = setInterval(() => {
        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') return;

        // 超时检测：平滑跳过当前任务继续下一项，杜绝循环 reload 刷新
        if (!executed && Date.now() - parseStartTime > PARSE_TIMEOUT_MS) {
            clearInterval(intervalId);
            logger(`${taskLabel}：${name} 解析超时（超过60秒未加载），跳过当前任务继续下一项`, 'orange');
            switchMission();
            return;
        }

        // 优先在传入的 dom 中查找
        var result = dom && dom.length > 0 ? searchIframesForMedia(dom) : null;

        // fallback：dom 中没找到，搜索页面上所有 .ans-attach-ct 内的 iframe
        if (!result) {
            try {
                var allIframes = _d.querySelectorAll('.ans-attach-ct iframe, .ans-job-ct iframe, iframe');
                if (allIframes.length > 0) {
                    result = searchIframesForMedia(allIframes);
                }
            } catch { /* empty */ }
        }
        if (!result) {
            try {
                var directMedia = _d.querySelector('video') || _d.querySelector('audio');
                if (directMedia) {
                    mediaType = (directMedia.tagName.toLowerCase() === 'audio') ? 'audio' : 'video';
                    result = { media: directMedia, doc: _d };
                }
            } catch { /* empty */ }
        }

        // 诊断日志：首次轮询时输出状态
        if (!_parseDebugLogged) {
            _parseDebugLogged = true;
            var domSrcs = [];
            if (dom && dom.length > 0) {
                for (var di = 0; di < dom.length; di++) domSrcs.push(dom[di].src || '(无src)');
            }
            console.log('[GPTJs Debug] dom iframes:', domSrcs, '| 找到媒体:', !!result);
        }

        if (result && !executed) {
            executed = true;
            clearInterval(intervalId);

            var media = result.media;
            var doc = result.doc;

            // 计算最终倍速：最高 16×
            const userRate = getRate();
            const finalRate = userRate;
            if (mediaType === 'video' && isPlaybackRateDisabled(doc) && userRate > 1) {
                logger(`${name} 未检测到超星倍速菜单，脚本仍会强制生效：${userRate}×`, 'orange');
            } else if (userRate > 1) {
                logger(`已开启倍速：${userRate}×（高倍速可能被超星判定异常）`, 'orange');
            }

            logger(`${name} - ${mediaType} 播放成功，开始控制播放（${finalRate}×）`);
            try {
                if (typeof stopNavigationWatchdog === 'function') stopNavigationWatchdog();
                if (window.top && typeof window.top.stopNavigationWatchdog === 'function') window.top.stopNavigationWatchdog();
            } catch { /* 忽略 */ }

            const runPlayback = () => {
                return new Promise((resolve, reject) => {
                    // 所有句柄集中声明在这里：
                    // _doResolve / fail 都要清理它们，而 _doResolve 的定义位置在
                    // reloadInterval / quizIntervalId 之前，若沿用 const 就近声明会踩 TDZ
                    // （事件异步派发时侥幸不炸，一旦有人把调用挪到同步路径就是 ReferenceError）。
                    let reloadInterval = null;
                    let quizIntervalId = null;
                    let _heartbeatIntervalId = null;
                    let _stallCheckId = null;
                    let _unhandledQuizSince = 0;
                    let _playbackResolved = false;

                    // 唯一收口：无论成功、跳过还是失败，都必须走这里释放句柄。
                    // 旧实现只有 _doResolve 清理，reject 路径（playMedia 失败）直接跳过，
                    // 于是 pause/timeupdate 监听器和四个定时器全部残留，切到下一个任务后
                    // 旧的播放循环还在跑，多个 media 被反复 play()。
                    const _cleanup = () => {
                        media.removeEventListener("pause", playFunction);
                        media.removeEventListener('timeupdate', onTimeUpdate);
                        media.removeEventListener("ended", _onEnded);
                        if (quizIntervalId) clearInterval(quizIntervalId);
                        if (_heartbeatIntervalId) clearInterval(_heartbeatIntervalId);
                        clearInterval(reloadInterval);
                        if (_stallCheckId) clearInterval(_stallCheckId);
                        try { if (typeof ne21StopMicroActions === 'function') ne21StopMicroActions(); } catch { /* 忽略 */ }
                    };
                    const fail = (reason) => {
                        if (_playbackResolved) return;
                        _playbackResolved = true;
                        logger(`${name} - ${mediaType} ${reason || '播放中断'}`, 'orange');
                        _cleanup();
                        reject(new Error(reason || 'playback failed'));
                    };

                    // 1. 错误检测定时器
                    reloadInterval = setInterval(() => {
                        const errorDiv = doc.querySelector(".vjs-modal-dialog-content");
                        if (["视频文件损坏", "网络错误导致视频下载中途失败", "视频因格式不支持", "网络的问题无法加载"].some(
                            (s) => errorDiv && errorDiv.innerText.includes(s)
                        )) {
                            logger("检测到视频/音频加载失败，即将跳过。", "red");
                            _cleanup();
                            // 延时 3 秒让用户看清日志，然后正常切下一个任务
                            setTimeout(() => resolve(), 3000);
                            return;
                        }
                    }, 3000);

                    // 2. 视频弹题定时器
                    quizIntervalId = mediaType === 'video' ? setInterval(function () {
                        handleVideoQuiz(doc, media, name);
                    }, 1500) : null;

                    // 完播判定辅助函数：主动覆盖 ended 事件及倒数 0.8s 边界，增加 duration >= 3 门限保护，杜绝刚开播误判完播
                    const isMediaFinished = () => {
                        if (media.ended) return true;
                        if (isFinite(media.duration) && media.duration >= 3) {
                            // 当剩余播放时间小于 0.8 秒时即可认定完播，防止部分浏览器内核停在尾帧不派发 ended
                            if (media.currentTime >= media.duration - 0.8) return true;
                        }
                        return false;
                    };

                    // 3. 暂停恢复逻辑 (playFunction)
                    // currentRate：此刻真正该用的倍速。临近结尾时 onTimeUpdate 会把 videoRate
                    // 降到 1（保证 ended 正常派发），此后任何一次"后台暂停→恢复播放"
                    // 都必须继续沿用 1×，否则 videoRate 又会被锁回用户设定的高倍速，
                    // 视频以 16× 冲过最后 10 秒，既可能跳过结尾导致 ended 丢失，
                    // 也让"结尾降速"这个设计完全失效。旧实现这里两个分支都硬写 finalRate。
                    let videoRate = finalRate;
                    const playFunction = async () => {
                        if (typeof checkChaoxingCaptcha === 'function' && checkChaoxingCaptcha()) return;
                        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') return;
                        if (mediaType === 'video' && doc.querySelector('.ans-videoquiz')) return;
                        // 关键防护：如果视频其实已经完播，绝不再调用 play()，直接触发完成
                        if (isMediaFinished()) {
                            _doResolve('已播放完成');
                            return;
                        }
                        if (media.ended === false) {
                            await new Promise(r => setTimeout(r, 1000));
                            if (isMediaFinished()) {
                                _doResolve('已播放完成');
                                return;
                            }
                            if (media.paused && media.ended === false) {
                                media.muted = true;
                                try {
                                    media.play().then(() => {
                                        hookMediaRate(media, videoRate);
                                    }).catch(async (e) => {
                                        console.log('[GPTJs] 后台恢复播放失败，尝试静音并重新播放:', e);
                                        media.muted = true;
                                        await playMedia(() => media.play(), media);
                                        hookMediaRate(media, videoRate);
                                    });
                                } catch (err) {
                                    console.error(err);
                                }
                            }
                        }
                    };

                    media.addEventListener("pause", playFunction);

                    // 4. 临近结尾自动恢复 1×（仅当当前为倍速）及主动完播感知
                    let rateRestored = finalRate <= 1;
                    const onTimeUpdate = () => {
                        if (!rateRestored && isFinite(media.duration) && media.duration - media.currentTime < 10) {
                            rateRestored = true;
                            videoRate = 1;
                            try { delete media.playbackRate; } catch { /* empty */ }
                            hookMediaRate(media, 1);
                        }
                        // 后台/切屏切回时 timeupdate 仍会派发，主动检出完播状态
                        if (isMediaFinished()) {
                            _doResolve('已播放完成');
                        }
                    };
                    media.addEventListener('timeupdate', onTimeUpdate);

                    // 5. 播放结束监听与清理
                    const _doResolve = (reason) => {
                        if (_playbackResolved) return;
                        _playbackResolved = true;
                        logger(`${name} - ${mediaType} ${reason || '已播放完成'}`);
                        _cleanup();
                        resolve();
                    };
                    const _onEnded = () => { _doResolve('已播放完成'); };
                    media.addEventListener("ended", _onEnded);

                    // 5.5 后台高频完播与唤醒心跳（每 1.5 秒）：
                    // 解决切屏、最小化或离开页面时，Chromium 节流导致 ended 丢失且 timeupdate 减频的问题
                    _heartbeatIntervalId = setInterval(() => {
                        if (_playbackResolved) {
                            clearInterval(_heartbeatIntervalId);
                            return;
                        }
                        if (typeof checkChaoxingCaptcha === 'function' && checkChaoxingCaptcha()) return;
                        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') return;
                        // 1. 完播主动检出
                        if (isMediaFinished()) {
                            _doResolve('已播放完成（心跳感知）');
                            return;
                        }
                        // 2. 后台失焦被浏览器暂停时的自动恢复
                        if (media.paused && !media.ended) {
                            if (!(mediaType === 'video' && doc.querySelector('.ans-videoquiz'))) {
                                playFunction();
                            }
                        }
                    }, 1500);

                    // 6.5 兜底卡死检测：进度连续无变化才跳过，避免误伤长视频
                    let _lastProgressTime = -1;
                    let _stalledMs = 0;
                    const _STALL_LIMIT_MS = 2.5 * 60 * 1000; // 优化：连续 2.5 分钟（原5分钟）无进度视为卡死
                    const _UNHANDLED_QUIZ_LIMIT_MS = 90 * 1000;   // 弹题无人处理的宽限（AI 正常很快返回）
                    _stallCheckId = setInterval(() => {
                        if (typeof checkChaoxingCaptcha === 'function' && checkChaoxingCaptcha()) {
                            _lastProgressTime = media.currentTime;
                            _stalledMs = 0;
                            return;
                        }
                        // 脚本暂停或弹题期间暂停属正常，重新计时
                        if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
                            _lastProgressTime = media.currentTime;
                            _stalledMs = 0;
                            return;
                        }
                        if (mediaType === 'video' && doc.querySelector('.ans-videoquiz')) {
                            // 弹题卡住时分两种，处理方式完全不同：
                            //   a) 答题链路正在处理（data-ne21-status=processing）—— 正常等待；
                            //   b) 没人处理（最常见：用户在浮窗关掉了"处理测验"，或 AI 连续失败后
                            //      状态被清掉）—— 旧实现直接 return，视频永远暂停在弹题上，
                            //      心跳不恢复、卡死检测也跳过，只能手动刷新页面。
                            // 这里对 (b) 计时，超过阈值就明确告知并跳过当前任务。
                            var activeQuiz = doc.querySelector('.ans-videoquiz');
                            if (activeQuiz && activeQuiz.getAttribute('data-ne21-status') === 'processing') {
                                _unhandledQuizSince = 0;
                            } else if (activeQuiz) {
                                if (_unhandledQuizSince === 0) _unhandledQuizSince = Date.now();
                                else if (Date.now() - _unhandledQuizSince > _UNHANDLED_QUIZ_LIMIT_MS) {
                                    _doResolve('视频弹题长时间无人处理（如已关闭"自动处理测验"），跳过当前任务');
                                    return;
                                }
                            } else {
                                _unhandledQuizSince = 0;
                            }
                            _lastProgressTime = media.currentTime;
                            _stalledMs = 0;
                            return;
                        }
                        _unhandledQuizSince = 0;
                        if (isMediaFinished()) {
                            _doResolve('已播放完成');
                            return;
                        }
                        if (Math.abs(media.currentTime - _lastProgressTime) > 0.5) {
                            _lastProgressTime = media.currentTime;
                            _stalledMs = 0;
                        } else {
                            _stalledMs += 15 * 1000;
                            // 用 >= 而不是 === ：严格相等依赖"每轮恰好 +15000"这个前提，
                            // 一旦有任意一轮走了上面的提前 return，这个等值就永远等不到。
                            if (_stalledMs >= 30 * 1000) {
                                playFunction();
                            }
                            if (_stalledMs >= _STALL_LIMIT_MS) {
                                _doResolve('播放长时间无进度（疑似卡死），自动跳过');
                            }
                        }
                    }, 15 * 1000);

                    // 5.9 启动后台周期性微动作仿真。
                    // 停止端 ne21StopMicroActions 一直在 _doResolve 里调用，
                    // 但开始端从来没有任何地方调用过 —— 这个"全面激活"的功能
                    // 实际从未运行过。这里补上，形成完整的 start/stop 配对。
                    try { if (typeof ne21StartMicroActions === 'function') ne21StartMicroActions(); } catch { /* 面板未就绪 */ }

                    // 6. 初始播放流程（为 WebKit / Tencent X5 注入内联播放属性，杜绝弹出全屏中断后台流转）
                    try {
                        media.setAttribute('playsinline', 'true');
                        media.setAttribute('webkit-playsinline', 'true');
                        media.setAttribute('x5-playsinline', 'true');
                        media.setAttribute('x5-video-player-type', 'h5');
                    } catch { /* 忽略 */ }
                    media.muted = true;
                    // 拟人化起播延时（800~1300ms），给超星播放器充足的加载与通信准备时间，规避刚加载即突发点击被判定机器行为
                    var playDelay = 800 + Math.floor(Math.random() * 500);
                    setTimeout(() => {
                        if (typeof checkChaoxingCaptcha === 'function' && checkChaoxingCaptcha()) {
                            // 若起播前已存在 9010 验证码，挂起等待验证解除后由心跳自然唤醒，绝不触发高频重试
                            return;
                        }
                        try {
                            var bigPlayBtn = doc.querySelector('.vjs-big-play-button, .playBtn, button.vjs-play-control, .ans-video-play');
                            if (bigPlayBtn) {
                                if (typeof ne21HumanClick === 'function') ne21HumanClick(bigPlayBtn);
                                else bigPlayBtn.click();
                            }
                        } catch { /* 忽略 */ }
                        playMedia(() => media.play(), media).then(() => {
                            hookMediaRate(media, videoRate);
                        }).catch(function (playErr) {
                            // 必须走 fail()：旧实现这里直接用 reject，跳过了全部清理，
                            // 定时器与事件监听器会一直挂到切页之后。
                            fail('播放启动失败: ' + String(playErr));
                        });
                    }, playDelay);
                });
            };

            runPlayback().then(() => {
                var nextDelay = 2200 + Math.floor(Math.random() * 800);
                setTimeout(switchMission, nextDelay);
            }).catch(err => {
                logger(`${name} - 播放异常: ${err}，即将切换下一任务`, 'red');
                var nextDelay = 2200 + Math.floor(Math.random() * 800);
                setTimeout(switchMission, nextDelay);
            });
        }
    }, 2500);
}

// 强锁 playbackRate：当 rate > 1 时用 Object.defineProperty 阻止超星播放器把倍速改回 1
// 若用户为 1× 正常速度则不拦截，完全保持原生视频属性，零风控特征
function hookMediaRate(media, rate) {
    if (!media) return;
    if (rate <= 1) {
        try { media.playbackRate = 1; } catch { /* empty */ }
        return;
    }
    try { media.playbackRate = rate; } catch { /* empty */ }
    try {
        Object.defineProperty(media, 'playbackRate', {
            configurable: true,
            get: function () { return rate; },
            set: function () { /* 阻止外部改写 */ }
        });
    } catch {
        try {
            media.addEventListener('ratechange', function () {
                if (media.playbackRate !== rate) {
                    try { media.playbackRate = rate; } catch { /* empty */ }
                }
            });
        } catch { /* empty */ }
    }
}

// 超星 video.js 播放器若禁用了倍速，倍速菜单会无项 → 视为禁用。
//
// 必须同时搜多个文档：倍速菜单挂在播放器外壳上，很多时候与 media 元素不在同一个
// document（media 在内层 iframe，菜单在父文档）。旧实现只搜 media 所在文档，
// 菜单明明存在却判成"已禁用"，日志说的和实际情况正好相反。
function isPlaybackRateDisabled(iframeDocument) {
    var docs = [];
    function push(d) {
        if (d && docs.indexOf(d) === -1) docs.push(d);
    }
    push(iframeDocument);
    try {
        var win = iframeDocument && iframeDocument.defaultView;
        while (win && win !== win.top) {
            push(win.document);
            win = win.parent;
        }
    } catch { /* 跨域链断裂，只用已收集到的文档 */ }
    try { push((typeof unsafeWindow !== 'undefined' && unsafeWindow && unsafeWindow.document) || document); } catch { /* 忽略 */ }

    for (var i = 0; i < docs.length; i++) {
        try {
            var items = docs[i].querySelectorAll('.vjs-playback-rate .vjs-menu-content .vjs-menu-item');
            if (items && items.length > 0) return false;   // 任一文档里找到菜单即视为可用
        } catch { /* 跨域文档跳过 */ }
    }
    return true;
}

function missonBook(dom, obj) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { missonBook(dom, obj) }, 3000);
        return;
    }
    if (setting.task) {
        if (!obj || obj['jobid'] == undefined) {
            logger("当前只处理任务点任务,跳过", 'red')
            switchMission()
            return
        }
    }
    let prop = (obj && obj['property']) || {};
    let jobId = prop['jobid'] || (obj && obj['jobid']),
        name = prop['bookname'] || prop['name'] || '读书',
        jtoken = obj && obj['jtoken'],
        knowledgeId = getSafeMissionParam('knowledgeid'),
        courseId = getSafeMissionParam('courseid'),
        clazzId = getSafeMissionParam('clazzId') || getSafeMissionParam('clazzid');
    if (!obj || obj['job'] == undefined) {
        logger('读书：' + name + '检测已完成，准备执行下一个任务。', 'green')
        switchMission()
        return
    }
    $.ajax({
        url: _l.protocol + '//' + _l.host + '/ananas/job?jobid=' + jobId + '&knowledgeid=' + knowledgeId + '&courseid=' + courseId + '&clazzid=' + clazzId + '&jtoken=' + jtoken + '&_dc=' + String(Math.round(new Date())),
        method: 'GET',
        success: function (res) {
            if (res && res.status) {
                logger('读书：' + name + ' ' + (res.msg || '处理成功') + ',准备执行下一个任务。', 'green')
            } else {
                logger('读书：' + name + '处理异常,跳过。', 'red')
            }
            switchMission()
            return
        },
        error: function () {
            logger('读书：' + name + '请求失败，跳过。', 'orange')
            switchMission()
        }
    })
}

function missonDoucument(dom, obj) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { missonDoucument(dom, obj) }, 3000);
        return;
    }
    if (setting.task) {
        if (!obj || obj['jobid'] == undefined) {
            logger("当前只处理任务点任务,跳过", 'red')
            switchMission()
            return
        }
    }
    let prop = (obj && obj['property']) || {};
    let jobId = prop['jobid'] || (obj && obj['jobid']),
        name = prop['name'] || '文档',
        jtoken = obj && obj['jtoken'],
        knowledgeId = getSafeMissionParam('knowledgeid'),
        courseId = getSafeMissionParam('courseid'),
        clazzId = getSafeMissionParam('clazzId') || getSafeMissionParam('clazzid');
    if (!obj || obj['job'] == undefined) {
        logger('文档：' + name + '检测已完成，准备执行下一个任务。', 'green')
        switchMission()
        return
    }
    $.ajax({
        url: _l.protocol + '//' + _l.host + '/ananas/job/document?jobid=' + jobId + '&knowledgeid=' + knowledgeId + '&courseid=' + courseId + '&clazzid=' + clazzId + '&jtoken=' + jtoken + '&_dc=' + String(Math.round(new Date())),
        method: 'GET',
        success: function (res) {
            if (res && res.status) {
                logger('文档：' + name + ' ' + (res.msg || '处理成功') + ',准备执行下一个任务。', 'green')
            } else {
                logger('文档：' + name + '处理异常,跳过。', 'red')
            }
            switchMission()
            return
        },
        error: function () {
            logger('文档：' + name + '请求失败，跳过。', 'orange')
            switchMission()
        }
    })

}

function missonRead(dom, obj) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { missonRead(dom, obj) }, 3000);
        return;
    }
    if (setting.task) {
        if (!obj || obj['jobid'] == undefined) {
            logger("当前只处理任务点任务,跳过", 'red')
            switchMission()
            return
        }
    }
    let prop = (obj && obj['property']) || {};
    let jobId = prop['jobid'] || (obj && obj['jobid']),
        name = prop['title'] || prop['name'] || '阅读',
        jtoken = obj && obj['jtoken'],
        knowledgeId = getSafeMissionParam('knowledgeid'),
        courseId = getSafeMissionParam('courseid'),
        clazzId = getSafeMissionParam('clazzId') || getSafeMissionParam('clazzid');
    if (!obj || obj['job'] == undefined) {
        logger('阅读：' + name + ',检测已完成，准备执行下一个任务。', 'green')
        switchMission()
        return
    }
    $.ajax({
        url: _l.protocol + '//' + _l.host + '/ananas/job/readv2?jobid=' + jobId + '&knowledgeid=' + knowledgeId + '&courseid=' + courseId + '&clazzid=' + clazzId + '&jtoken=' + jtoken + '&_dc=' + String(Math.round(new Date())),
        method: 'GET',
        success: function (res) {
            if (res && res.status) {
                logger('阅读：' + name + ' ' + (res.msg || '处理成功') + ',准备执行下一个任务。', 'green')
            } else {
                logger('阅读：' + name + '处理异常,跳过。', 'red')
            }
            switchMission()
            return
        },
        error: function () {
            logger('阅读：' + name + '请求失败，跳过。', 'orange')
            switchMission()
        }
    })
}

function missonKnowledgeGraph(obj) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(function () { missonKnowledgeGraph(obj) }, 3000);
        return;
    }
    var taskName = (obj['property'] && obj['property']['name']) || '知识图谱';
    // 如果已完成（job 字段不存在），直接跳过
    if (obj['job'] == undefined) {
        logger('知识图谱：' + taskName + '，检测已完成，准备执行下一个任务。', 'green')
        switchMission()
        return
    }
    // 在所有 iframe 中查找知识图谱的展开按钮
    var clicked = false;
    try {
        var iframes = document.querySelectorAll('iframe');
        for (var i = 0; i < iframes.length; i++) {
            try {
                var iframeDoc = iframes[i].contentDocument || iframes[i].contentWindow.document;
                if (!iframeDoc) continue;
                var packBtn = iframeDoc.querySelector('#graphPackBtn');
                if (packBtn) {
                    // 如果按钮还没展开（没有 active 类），点击它
                    if (!packBtn.classList.contains('active')) {
                        packBtn.click();
                        logger('知识图谱：' + taskName + '，已点击展开按钮', 'green');
                    } else {
                        logger('知识图谱：' + taskName + '，已是展开状态', 'green');
                    }
                    clicked = true;
                    break;
                }
            } catch {
                // 跨域 iframe 忽略
            }
        }
    } catch (e) {
        console.log('[GPTJs] 查找知识图谱 iframe 异常:', e);
    }
    if (!clicked) {
        logger('知识图谱：' + taskName + '，未找到展开按钮，可能已完成或不在当前页面，跳过', 'orange');
    }
    // 等待 iframe 内部的 finishJob 完成汇报后再切换下一个任务
    setTimeout(function () { switchMission() }, 3000);
}

function missonWork(dom, obj) {
    if (!setting.work) {
        logger('用户设置不自动处理测验，准备处理下一个任务', 'green')
        switchMission()
        return
    }
    let prop = (obj && obj['property']) || {};
    let jobId = (obj && obj['jobid']) !== undefined ? obj['jobid'] : prop['jobid'];
    let enc = (obj && obj['enc']) || prop['enc'] || '';
    let hasJobId = (jobId !== undefined && jobId !== '');

    let isDo;
    if (setting.task) {
        logger("当前只处理任务点任务", 'red')
        isDo = hasJobId;
    } else {
        logger("当前默认处理所有任务（包括非任务点任务）", 'red')
        isDo = true
    }
    if (isDo) {
        if (hasJobId) {
            let courseId = getSafeMissionParam('courseid');
            let clazzId = getSafeMissionParam('clazzId') || getSafeMissionParam('clazzid');
            let knowledgeId = getSafeMissionParam('knowledgeid');
            var cleanWorkId = String(jobId).replace(/^work-/, '');
            var phoneWeb = _l.protocol + '//' + _l.host + '/work/phone/work?workId=' + cleanWorkId + '&courseId=' + courseId + '&clazzId=' + clazzId + '&knowledgeId=' + knowledgeId + '&jobId=' + jobId + (enc ? ('&enc=' + enc) : '');
            setTimeout(() => { startDoPhoneCyWork(0, dom, phoneWeb) }, 3000)
        } else {
            setTimeout(() => { startDoCyWork(0, dom) }, 3000)
        }
    } else {
        logger('用户设置只处理属于任务点的任务，准备处理下一个任务', 'green')
        switchMission()
        return
    }
}


// ==========================================
// 测验/作业提交与保存按钮智能识别（适配【暂时保存】与【提交】按钮）
// ==========================================
function collectQuizSearchRoots($container) {
    var roots = [];
    function addRoot($r) {
        if (!$r || !$r.length) return;
        var dom = $r[0];
        if (!dom) return;
        for (var k = 0; k < roots.length; k++) {
            if (roots[k][0] === dom) return;
        }
        roots.push($r);
    }

    addRoot($container);
    if ($container && $container.length) {
        try {
            if ($container[0].ownerDocument) addRoot($($container[0].ownerDocument));
        } catch { /* 忽略 */ }
        try { addRoot($container.parent()); } catch { /* 忽略 */ }
        try { addRoot($container.closest("body")); } catch { /* 忽略 */ }
    }
    if (typeof _currentPhoneDom !== "undefined" && _currentPhoneDom && _currentPhoneDom.length) {
        addRoot(_currentPhoneDom);
    }
    if (typeof _currentPhoneForm !== "undefined" && _currentPhoneForm && _currentPhoneForm.length) {
        addRoot(_currentPhoneForm);
    }
    if (typeof $frame_c !== "undefined" && $frame_c && $frame_c.length) {
        addRoot($frame_c);
        try {
            if ($frame_c[0].ownerDocument) addRoot($($frame_c[0].ownerDocument));
        } catch { /* 忽略 */ }
    }
    try { addRoot($(document)); } catch { /* 忽略 */ }
    try { if (window.parent && window.parent.document) addRoot($(window.parent.document)); } catch { /* 忽略 */ }
    try { if (window.top && window.top.document) addRoot($(window.top.document)); } catch { /* 忽略 */ }

    // 递归检索各上下文内的 iframe 子文档
    for (var i = 0; i < roots.length; i++) {
        try {
            roots[i].find("iframe").each(function () {
                try {
                    var c = $(this).contents();
                    if (c && c.length) addRoot(c);
                } catch { /* 忽略 */ }
            });
        } catch { /* 忽略 */ }
    }
    return roots;
}

function resolveQuizSubmitBtn($container) {
    var roots = collectQuizSearchRoots($container);

    function isSubmitText(str) {
        var clean = (str || "").replace(/\s+/g, "");
        return clean === "提交" || clean === "提交作业" || clean === "确认提交" || clean === "交卷" || clean === "立即提交" || clean === "提交测验" || clean === "完成提交";
    }

    // 1. 优先按精确文本查找按钮（支持 button, a, input, span, div 等各类胶囊与圆角按钮）
    for (var i = 0; i < roots.length; i++) {
        var $c = roots[i];
        var $btn = $c.find("button, a, input, span, div, p").filter(function () {
            var t = $(this).text().trim() || $(this).val() || "";
            if (!isSubmitText(t)) return false;
            // 排除包裹大块布局的非按钮大容器（只保留叶子或文字紧凑的元素）
            return $(this).children("p, div, form, ul, table").length === 0;
        });
        if ($btn.length) {
            var $target = $btn.first();
            // 如果点中了内嵌的 span/i 等标签，向上寻找可点击的外层容器（如 a, button, div.btn 等）
            var $clickableParent = $target.closest('a, button, [role="button"], .btnSubmit, .btn-ok-bottom, .sub-btn, .subBtn, .submitBtn, .btn');
            return $clickableParent.length ? $clickableParent : $target;
        }
    }

    // 2. 经典选择器兜底
    for (var j = 0; j < roots.length; j++) {
        var $fallback = roots[j].find('#okBtn, .btnSubmit, .btn-ok-bottom, .sub-btn, .subBtn, .submitBtn, .submit-btn, [onclick*="btnSubmit"], [onclick*="formSub"], .zsubmit a, .ZY_sub a, a.bluebtn:contains("提交"), a.btnBlue:contains("提交")');
        if ($fallback.length) return $fallback.first();
    }

    return $();
}

function resolveQuizSaveBtn($container) {
    var roots = collectQuizSearchRoots($container);

    function isSaveText(str) {
        var clean = (str || "").replace(/\s+/g, "");
        return clean === "暂时保存" || clean === "暂存" || clean === "保存" || clean === "保存作业" || clean === "保存草稿";
    }

    for (var i = 0; i < roots.length; i++) {
        var $c = roots[i];
        var $btn = $c.find("button, a, input, span, div, p").filter(function () {
            var t = $(this).text().trim() || $(this).val() || "";
            if (!isSaveText(t)) return false;
            return $(this).children("p, div, form, ul, table").length === 0;
        });
        if ($btn.length) {
            var $target = $btn.first();
            var $clickableParent = $target.closest('a, button, [role="button"], .btnSave, .btn-save, .btn');
            return $clickableParent.length ? $clickableParent : $target;
        }
    }

    for (var j = 0; j < roots.length; j++) {
        var $fallback = roots[j].find('.btnSave, .btn-save, a.btnWhite:contains("保存"), [onclick*="btnSave"], [onclick*="save"], .zsubmit .btn-save, .ZY_sub .btnSave');
        if ($fallback.length) return $fallback.first();
    }

    return $();
}

// 强化版点击触发：原生 click + jQuery click + MouseEvent 深度事件派发
function triggerQuizButtonClick($btn) {
    if (!$btn || !$btn.length) return false;
    var el = $btn[0];
    try {
        if (typeof ne21HumanClick === "function" && isHumanJitterEnabled()) {
            ne21HumanClick($btn);
        } else {
            if (typeof el.click === "function") el.click();
            if (typeof $btn.click === "function") $btn.click();
        }
    } catch {
        try { if (typeof el.click === "function") el.click(); } catch { /* 忽略 */ }
    }

    setTimeout(function () {
        try {
            var doc = el.ownerDocument || document;
            var win = doc.defaultView || window;
            var evt = new MouseEvent("click", {
                bubbles: true,
                cancelable: true,
                view: win
            });
            el.dispatchEvent(evt);
            var parent = el.parentElement;
            if (parent && parent !== doc.body) {
                if (typeof parent.click === "function") parent.click();
                parent.dispatchEvent(new MouseEvent("click", { bubbles: true, cancelable: true, view: win }));
            }
        } catch { /* 忽略 */ }
    }, 100);

    return true;
}

// 尝试直接调用超星原生提交函数（作为找不到按钮时的终极兜底）
function trySubmitQuizFormDirectly($container) {
    try {
        var roots = collectQuizSearchRoots($container);
        for (var i = 0; i < roots.length; i++) {
            var doc = roots[i][0] ? (roots[i][0].ownerDocument || (roots[i][0].nodeType === 9 ? roots[i][0] : null)) : null;
            var win = doc ? doc.defaultView : null;
            if (win) {
                if (typeof win.btnSubmit === "function") {
                    win.btnSubmit();
                    return true;
                }
                if (typeof win.formSub === "function") {
                    win.formSub();
                    return true;
                }
                if (typeof win.submitWork === "function") {
                    win.submitWork();
                    return true;
                }
            }
            var $form = roots[i].find("form");
            if ($form.length) {
                var formEl = $form[0];
                if (typeof formEl.submit === "function") {
                    formEl.submit();
                    return true;
                }
            }
        }
    } catch { /* 忽略 */ }
    return false;
}

// 自动点击确认提交的二次确认弹窗
function autoConfirmQuizSubmission($container) {
    try {
        var roots = collectQuizSearchRoots($container);
        for (var i = 0; i < roots.length; i++) {
            var $d = roots[i];
            var $confirm = $d.find([
                '#confirmSubWin a.bluebtn',
                '#confirmSubWin a:contains("确定")',
                '#confirmSubWin button:contains("确定")',
                '#confirmSubWin span:contains("确定")',
                '#confirmSubWin div:contains("确定")',
                '.popDiv a.bluebtn',
                '.popDiv a:contains("确定")',
                '.popDiv a:contains("确认")',
                '.popDiv button:contains("确定")',
                '.popDiv span:contains("确定")',
                '.popDiv .btn:contains("确定")',
                '.maskContent a:contains("确定")',
                '.maskContent button:contains("确定")',
                '.layui-layer-btn a.layui-layer-btn0',
                '.layui-layer-btn a:contains("确定")',
                '.el-message-box__btns button.el-button--primary',
                '.el-message-box__btns button:contains("确定")',
                'button.swal2-confirm'
            ].join(', '));
            if ($confirm.length) {
                var el = $confirm.first()[0];
                if (typeof el.click === "function") el.click();
                try {
                    var doc = el.ownerDocument || document;
                    var evt = new MouseEvent("click", { bubbles: true, cancelable: true, view: doc.defaultView || window });
                    el.dispatchEvent(evt);
                } catch { /* 忽略 */ }
                return true;
            }
        }
    } catch { /* 忽略 */ }
    return false;
}

function doPhoneWork($dom) {
    _currentPhoneDom = $dom;
    var $cy = $dom.find(".Wrappadding form");
    _currentPhoneForm = $cy;
    $subBtn = $cy.find(".zquestions .zsubmit .btn-ok-bottom");
    $okBtn = $dom.find("#okBtn");
    $saveBtn = $cy.find(".zquestions .zsubmit .btn-save");
    let TimuList = $cy.find(".zquestions .Py-mian1");
    var willSubmit = localStorage.getItem("GPTJsSetting.sub") === "true" || localStorage.getItem("GPTJsSetting.force") === "true";
    logger("准备处理测验，共 " + TimuList.length + " 题；当前策略：【" + (willSubmit ? "自动提交" : "暂时保存") + "】", "purple");
    startDoPhoneTimu(0, TimuList);
}

function startDoPhoneTimu(index, TimuList) {
    if (localStorage.getItem("GPTJsSetting.isPaused") === "true") {
        setTimeout(() => { startDoPhoneTimu(index, TimuList); }, 3000);
        return;
    }
    if (index == TimuList.length) {
        // 注意：任务队列的前移统一由 switchMission() 负责（它会 splice 一次）。
        // 只认 _currentPhoneForm：旧实现还兜底引用 $cy，而 $cy 是 doPhoneWork 的局部变量，
        // 这里的 typeof 判定永远为 undefined，那段兜底从来没生效过。
        var $activeCy = (typeof _currentPhoneForm !== "undefined" && _currentPhoneForm && _currentPhoneForm.length) ? _currentPhoneForm : null;
        if (localStorage.getItem("GPTJsSetting.sub") === "true" || localStorage.getItem("GPTJsSetting.force") === "true") {
            var submitWaitMs = 3000;
            if (typeof isThinkingPauseEnabled === "function" && isThinkingPauseEnabled()) {
                submitWaitMs = Math.round(4500 + Math.random() * 2000);
                logger("测验作答完毕，拟人化通篇复查与鼠标微动（预计 " + (submitWaitMs / 1000).toFixed(1) + "s，防秒提风控）...", "blue");
                if (typeof ne21SimulateThinkingMicroActions === "function") {
                    ne21SimulateThinkingMicroActions(submitWaitMs);
                }
            } else {
                logger("测验处理完成，准备自动提交", "green");
            }
            setTimeout(function () {
                var $targetSub = resolveQuizSubmitBtn($activeCy);
                var submitted = false;
                if ($targetSub && $targetSub.length) {
                    logger("找到测验提交按钮，正在执行提交...", "green");
                    submitted = triggerQuizButtonClick($targetSub);
                } else if ($subBtn && $subBtn.length) {
                    logger("使用默认选择器提交测验...", "green");
                    submitted = triggerQuizButtonClick($subBtn);
                } else {
                    submitted = trySubmitQuizFormDirectly($activeCy);
                    if (submitted) {
                        logger("已通过原生提交函数触发提交", "green");
                    } else {
                        logger("⚠️ 未找到测验提交按钮，请手动点击提交", "orange");
                    }
                }

                // 轮询 4 秒自动确认提交弹窗
                var confirmAttempts = 0;
                var confirmTimer = setInterval(function () {
                    confirmAttempts++;
                    var confirmed = autoConfirmQuizSubmission($activeCy);
                    if ($okBtn && $okBtn.length) {
                        try { $okBtn.click(); confirmed = true; } catch { /* 忽略 */ }
                    }
                    if (confirmed || confirmAttempts >= 8) {
                        clearInterval(confirmTimer);
                        logger("提交确认流程结束，准备切换下一个任务点", "green");
                        setTimeout(function () { switchMission(); }, 2500);
                    }
                }, 500);
            }, submitWaitMs);
        } else {
            logger("测验处理完成，根据设置自动暂时保存", "green");
            setTimeout(function () {
                var $targetSave = resolveQuizSaveBtn($activeCy);
                if ($targetSave && $targetSave.length) {
                    logger("找到测验保存按钮，正在执行保存...", "green");
                    triggerQuizButtonClick($targetSave);
                } else if ($saveBtn && $saveBtn.length) {
                    logger("使用默认选择器暂时保存测验...", "green");
                    triggerQuizButtonClick($saveBtn);
                } else {
                    logger("⚠️ 未找到测验保存按钮，请手动点击暂时保存", "orange");
                }
                setTimeout(function () {
                    logger("暂时保存完成，准备切换下一个任务点", "green");
                    switchMission();
                }, 3000);
            }, 3000);
        }
        return;
    }
    // 获取当前题目所属的window对象 (可能是iframe)
    let contextWindow = TimuList[index] ? (TimuList[index].ownerDocument.defaultView || unsafeWindow) : unsafeWindow;
    let questionFull = $(TimuList[index]).find('.Py-m1-title').html() || '';
    let _questionClean = tidyQuestion(questionFull);
    let _type = resolveQuestionType($(TimuList[index]), _questionClean);
    let typeName = '';
    let typeNameMatch = _questionClean.match(/[(（[【]\s*([^)）\]】]+?)[)）\]】]/);
    if (typeNameMatch && typeNameMatch[1]) {
        typeName = typeNameMatch[1].split(/[,，、\s]/)[0];
    }
    if (!typeName) {
        typeName = ['单选题', '多选题', '填空题', '判断题', '简答题', '写作题', '翻译题'][_type] || '未知题型';
    }
    let _question = _questionClean
        .replace(/^\s*\d+[.、\s]*/, '')
        .replace(/^[(（[【].*?[)）\]】]/, '')
        .trim();
    let _answerTmpArr;
    var check_answer_flag = 0;

    _currentQuestionMeta = { index: index, total: TimuList.length, typeName: typeName }; _currentQuestionDom = $(TimuList[index]);
    switch (_type) {
        case 0: {
            //遍历选项列表
            _answerTmpArr = $(TimuList[index]).find('.answerList.singleChoice li')
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");

            _question = buildPrompt({ type: '单选题', question: _question, options: mergedAnswers.split('|') })
            //判断题目是否已作答
            for (let i = 0; i < _answerTmpArr.length; i++) {
                if ($(_answerTmpArr[i]).attr('aria-label')) {
                    if (!isRedoMode()) {
                        logger(index + 1 + '此题已作答，准备切换下一题', 'green')
                        check_answer_flag = 1;
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, 30)
                    } else {
                        logger(index + 1 + '此题已作答，重做模式下重新作答', 'blue')
                        // 重做模式：先取消已选选项
                        selectChoiceOption(_answerTmpArr[i], false)
                    }
                    break
                }
            }
            if (check_answer_flag == 0) {
                getAnswer(_type, _question).then((agrs) => {
                    _answerTmpArr = $(TimuList[index]).find('.answerList.singleChoice li')
                    let matched = findOptionIndexes(_answerTmpArr, agrs, false)
                    if (matched.length === 0) {
                        logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                        // setting.sub = 0
                        localStorage.setItem('GPTJsSetting.sub', false)
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    } else {
                        selectChoiceOption(_answerTmpArr[matched[0]], false)
                        logger('自动答题成功，准备切换下一题', 'green')
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            }
        }
            break
        case 1: {
            //遍历选项列表
            _answerTmpArr = $(TimuList[index]).find('.answerList.multiChoice li')
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '多选题', question: _question, options: mergedAnswers.split('|'), answer_format: "用'|'分割多个答案" })
            //判断题目是否已作答
            for (let i = 0; i < _answerTmpArr.length; i++) {
                if ($(_answerTmpArr[i]).attr('aria-label')) {
                    if (!isRedoMode()) {
                        logger(index + 1 + '此题已作答，准备切换下一题', 'green')
                        check_answer_flag = 1;
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, 30)
                    } else {
                        logger(index + 1 + '此题已作答，重做模式下重新作答', 'blue')
                        // 重做模式：先取消已选选项
                        selectChoiceOption(_answerTmpArr[i], true)
                    }
                    break
                }
            }
            if (check_answer_flag == 0) {
                getAnswer(_type, _question).then((agrs) => {
                    if (agrs == '暂无答案') {
                        logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                        // setting.sub = 0
                        localStorage.setItem('GPTJsSetting.sub', false)
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    } else {
                        _answerTmpArr = $(TimuList[index]).find('.answerList.multiChoice li')
                        let matched = findOptionIndexes(_answerTmpArr, agrs, true)
                        if (matched.length > 0) {
                            matched.forEach(idx => {
                                selectChoiceOption(_answerTmpArr[idx], true)
                            })
                            logger('自动答题成功，准备切换下一题', 'green')
                        } else {
                            logger('未能正确选择答案，请手动选择，跳过此题', 'red')
                            // setting.sub = 0
                            localStorage.setItem('GPTJsSetting.sub', false)
                        }
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            }
        }
            break
        case 2: {
            // 填空题处理 - 使用全局editors数组 (ExtJS)
            let tkList = $(TimuList[index]).find('.blankList2 input')
            // 使用属性选择器匹配包含editorIndex的元素
            let tkEditorBlocks = $(TimuList[index]).find('[data-editorindex]')

            // 检查是否使用UEditor编辑器（手机页面）
            if (tkEditorBlocks && tkEditorBlocks.length > 0) {
                let _blankCount = tkEditorBlocks.length;
                let formatDesc = _blankCount > 1
                    ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                    : "直接输出该填空的答案，不要包含任何说明";
                _question = buildPrompt({ type: '填空题', question: _question, answer_format: formatDesc })
                getAnswer(_type, _question).then((agrs) => {
                    if (agrs == '暂无答案') {
                        logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                        localStorage.setItem('GPTJsSetting.sub', false)
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                        return
                    }
                    let answers = splitMultiBlankAnswers(agrs, _blankCount)
                    let editorBlocks = $(TimuList[index]).find('[data-editorindex]')

                    $.each(editorBlocks, (i, block) => {
                        let editorIndex = $(block).attr('data-editorindex')
                        let itemId = $(block).attr('data-itemid')
                        let answerContent = answers[i] || ''

                        setTimeout(() => {
                            try {
                                let ueditor = null

                                // 1. 尝试通过 contextWindow.editors 获取
                                if (contextWindow.editors && contextWindow.editors[editorIndex]) {
                                    ueditor = contextWindow.editors[editorIndex].ueditor
                                }

                                // 2. 尝试通过 contextWindow.UE.instants 获取
                                if (!ueditor && contextWindow.UE && contextWindow.UE.instants) {
                                    let instantKey = 'ueditorInstant' + editorIndex
                                    ueditor = contextWindow.UE.instants[instantKey]
                                }

                                // 3. 尝试通过标准ID获取 (ananas-editor-answer + itemId)
                                if (!ueditor && itemId && contextWindow.UE && contextWindow.UE.getEditor) {
                                    ueditor = contextWindow.UE.getEditor('ananas-editor-answer' + itemId)
                                }

                                if (ueditor) {
                                    ueditor.setContent(answerContent)
                                    logger(`填空题第${i + 1}空已填入 (Index: ${editorIndex})`, 'green')
                                } else {
                                    logger(`填空题第${i + 1}空未找到编辑器实例 (Index: ${editorIndex}, ItemId: ${itemId})`, 'yellow')
                                }

                                // 始终尝试更新隐藏的textarea作为兜底
                                if (itemId) {
                                    let textarea = $('#answer' + itemId)
                                    if (textarea.length > 0) {
                                        textarea.val(answerContent)
                                        try {
                                            if (textarea[0].value === answerContent) {
                                                textarea[0].dispatchEvent(new Event('change'))
                                                textarea[0].dispatchEvent(new Event('input'))
                                            }
                                        } catch { /* empty */ }
                                    }
                                }
                            } catch (e) {
                                logger('填空题填入详情失败：' + e.message, 'red')
                            }
                        }, 500 * (i + 1))
                    })

                    setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time + 300 * editorBlocks.length)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            } else if (tkList && tkList.length > 0) {
                // 普通input模式（旧版页面）
                let _blankCount = tkList.length;
                let formatDesc = _blankCount > 1
                    ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                    : "直接输出该填空的答案，不要包含任何说明";
                _question = buildPrompt({ type: '填空题', question: _question, answer_format: formatDesc })
                getAnswer(_type, _question).then((agrs) => {
                    if (agrs == '暂无答案') {
                        logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                        localStorage.setItem('GPTJsSetting.sub', false)
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                        return
                    }
                    let answers = splitMultiBlankAnswers(agrs, _blankCount)
                    let inputList = $(TimuList[index]).find('.blankList2 input')
                    $.each(inputList, (i, t) => {
                        setTimeout(() => {
                            $(t).val(answers[i] || '')
                            // 触发input事件以确保框架能够检测到值的变化
                            $(t).trigger('input').trigger('change')
                        }, 200)
                    })
                    setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            } else {
                logger('未找到填空题输入区域，跳过此题', 'red')
                localStorage.setItem('GPTJsSetting.sub', false)
                setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
            }
            break
        }
        case 3: {
            _answerTmpArr = $(TimuList[index]).find('.answerList.panduan li')
            //判断题目是否已作答
            for (let i = 0; i < _answerTmpArr.length; i++) {
                if ($(_answerTmpArr[i]).attr('aria-label')) {
                    if (!isRedoMode()) {
                        logger(index + 1 + '此题已作答，准备切换下一题', 'green')
                        check_answer_flag = 1;
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, 30)
                    } else {
                        logger(index + 1 + '此题已作答，重做模式下重新作答', 'blue')
                        // 重做模式：先取消已选选项
                        selectChoiceOption(_answerTmpArr[i], false)
                    }
                    break
                }
            }
            if (check_answer_flag == 0) {
                _question = buildPrompt({ type: '判断题', question: _question, answer_format: "只回答正确或错误" })
                getAnswer(_type, _question).then((agrs) => {
                    let _i = matchJudgeOptionIndex(_answerTmpArr, agrs)
                    if (_i === -1) {
                        logger('未匹配到正确选项，跳过', 'red')
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                        return
                    }
                    selectChoiceOption(_answerTmpArr[_i], false)
                    logger('自动答题成功，准备切换下一题', 'green')
                    setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            }
            break
        }
        case 4:
        case 5:
        case 6: { // 简答题、写作题、翻译题或材料题
            let typePromptName = typeName || (_type === 5 ? '写作题' : (_type === 6 ? '翻译题' : '简答题'));
            let formatStr = _type === 5 ? "用英文根据题目进行写作" : (_type === 6 ? "中文英文互译" : "用50字简要回答");
            _question = buildPrompt({ type: typePromptName, question: _question, answer_format: formatStr });

            // 查找可能的编辑器区域（通过data-editorindex）
            let jdEditorBlocks = $(TimuList[index]).find('[data-editorindex]')
            let jdTextareas = $(TimuList[index]).find('textarea[name^="answer"]')
            if (jdTextareas.length === 0) {
                jdTextareas = findAnswerTextareas($(TimuList[index]))
            }

            // 检查是否已作答

            // 优先处理UEditor编辑器（手机页面）
            if (jdEditorBlocks && jdEditorBlocks.length > 0) {
                getAnswer(_type, _question).then((agrs) => {
                    if (agrs == '暂无答案') {
                        logger('AI无法匹配答案，请手动完成', 'red')
                        localStorage.setItem('GPTJsSetting.sub', false)
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                        return
                    }

                    // 获取第一个编辑器（简答题通常只有一个）
                    let firstBlock = jdEditorBlocks.first()
                    if (firstBlock.length > 0) {
                        let editorIndex = firstBlock.attr('data-editorindex')
                        let itemId = firstBlock.attr('data-itemid')
                        // 如果container上没有itemid，尝试从子元素或关联的textarea找
                        if (!itemId && jdTextareas.length > 0) {
                            let tid = $(jdTextareas[0]).attr('id')
                            if (tid) itemId = tid.replace('answer', '')
                        }

                        setTimeout(() => {
                            try {
                                let ueditor = null

                                // 1. 尝试通过 contextWindow.editors 获取
                                if (contextWindow.editors && contextWindow.editors[editorIndex]) {
                                    ueditor = contextWindow.editors[editorIndex].ueditor
                                }

                                // 2. 尝试通过 contextWindow.UE.instants 获取
                                if (!ueditor && contextWindow.UE && contextWindow.UE.instants) {
                                    let instantKey = 'ueditorInstant' + editorIndex
                                    ueditor = contextWindow.UE.instants[instantKey]
                                }

                                // 3. 尝试通过标准ID获取 (ananas-editor-answer + itemId)
                                if (!ueditor && itemId && contextWindow.UE && contextWindow.UE.getEditor) {
                                    ueditor = contextWindow.UE.getEditor('ananas-editor-answer' + itemId)
                                }

                                if (ueditor) {
                                    ueditor.setContent(agrs)
                                    logger(`简答题已填入 (Index: ${editorIndex})`, 'green')
                                } else {
                                    logger(`简答题未找到编辑器实例 (Index: ${editorIndex}, ItemId: ${itemId})`, 'yellow')
                                }

                                // 兜底：更新隐藏textarea
                                if (jdTextareas.length > 0) {
                                    let ta = $(jdTextareas[0])
                                    ta.val(agrs)
                                    // 触发change/input事件
                                    try {
                                        ta[0].dispatchEvent(new Event('change'))
                                        ta[0].dispatchEvent(new Event('input'))
                                    } catch { /* empty */ }
                                }
                            } catch (e) {
                                logger('简答题填入失败：' + e.message, 'red')
                                // 尝试直接设置textarea
                                if (jdTextareas.length > 0) {
                                    fillAnswerTextarea(jdTextareas[0], agrs, TimuList[index])
                                    logger('简答题通过textarea填入答案', 'blue')
                                }
                            }
                        }, 500)
                    } else {
                        // Fallback direct textarea
                        if (jdTextareas.length > 0) {
                            fillAnswerTextarea(jdTextareas[0], agrs, TimuList[index])
                            logger('简答题通过textarea填入答案', 'blue')
                        }
                    }

                    setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            }
            // 如果没有编辑器，但有textarea，直接使用textarea
            else if (jdTextareas && jdTextareas.length > 0) {
                getAnswer(_type, _question).then((agrs) => {
                    if (agrs == '暂无答案') {
                        logger('AI无法匹配答案，请手动完成', 'red')
                        localStorage.setItem('GPTJsSetting.sub', false)
                    } else {
                        fillAnswerTextarea(jdTextareas[0], agrs, TimuList[index])
                        logger('简答题自动答题成功，准备切换下一题', 'green')
                    }
                    setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
                    }
                })
            }
            // 如果以上方法都失败
            else {
                logger('无法找到简答题输入区域，请手动完成', 'red')
                localStorage.setItem('GPTJsSetting.sub', false)
                setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
            }
            break
        }
        // 注：这里原本还有一段 `case 5: { ... }`（提示"无法区分单/多选"并跳过）。
        // 但同一个 switch 上方的 `case 4: case 5: case 6:` 已经把它拦下了，
        // 该分支永远不可能执行 —— 属死代码，已删除（行为完全不变）。
        default:
            logger('暂不支持处理此类型题目：' + questionFull.match(/.*?\[(.*?)]|$/)[1] + '，跳过！请手动作答。', 'red')
            // setting.sub = 0
            localStorage.setItem('GPTJsSetting.sub', false)
            setTimeout(() => { startDoPhoneTimu(index + 1, TimuList) }, setting.time)
            break
    }
}

// 轮询方式查找iframe内的元素
// 解决getElement使用MutationObserver在iframe文档替换时失效导致脚本卡死的问题
// 第四个参数 maxAttempts：最大轮询次数，超时返回 null（上层 if(!el) 会触发自身重试），避免永久卡死
function pollForElement(iframeDom, selector, interval, maxAttempts) {
    interval = interval || 2000;
    maxAttempts = (typeof maxAttempts === 'number' && maxAttempts > 0) ? maxAttempts : 60; // 默认 60 次 ≈ 2 分钟
    return new Promise(function (resolve) {
        var attempts = 0;
        var check = function () {
            try {
                var doc = $(iframeDom).contents()[0];
                if (doc) {
                    var el = doc.querySelector(selector);
                    if (el) return resolve(el);
                }
            } catch { /* iframe未就绪或跨域 */ }
            attempts++;
            if (attempts >= maxAttempts) {
                logger('框架等待超时（' + Math.round(attempts * interval / 1000) + 's），上层将重试或跳过', 'red');
                return resolve(null);
            }
            if (attempts % 15 === 0) {
                logger('框架仍在加载中，已等待' + (attempts * interval / 1000) + '秒...请耐心等待', 'orange');
            }
            setTimeout(check, interval);
        };
        check();
    });
}

// 后台标签页防休眠：用 Web Audio 静音振荡器维持音频上下文，缓解浏览器对隐藏标签页的节流。
// 浏览器策略要求自动播放需用户手势；首次失败时会挂监听到 click/keydown 上再试一次。
var _ne21AntiSleepStarted = false;
function setupAntiSleep() {
    if (_ne21AntiSleepStarted) return;
    var AC = window.AudioContext || window.webkitAudioContext ||
        (typeof unsafeWindow !== 'undefined' && unsafeWindow && (unsafeWindow.AudioContext || unsafeWindow.webkitAudioContext));
    if (!AC) return;
    function tryStart() {
        if (_ne21AntiSleepStarted) return;
        try {
            var ac = new AC();
            var osc = ac.createOscillator();
            var gain = ac.createGain();
            gain.gain.value = 0; // 完全静音
            osc.connect(gain);
            gain.connect(ac.destination);
            osc.start();
            _ne21AntiSleepStarted = true;
            // 浏览器切后台（Chromium/Gecko/WebKit）时状态恢复
            function keepAwake() {
                try {
                    if (ac.state === 'suspended') ac.resume();
                } catch { /* 忽略 */ }
            }
            document.addEventListener('visibilitychange', keepAwake);
            if (typeof ac.addEventListener === 'function') {
                ac.addEventListener('statechange', keepAwake);
            }
            setInterval(keepAwake, 5000);
        } catch { /* ignore */ }
    }
    tryStart();
    if (!_ne21AntiSleepStarted) {
        var onUserGesture = function () {
            tryStart();
            if (_ne21AntiSleepStarted) {
                document.removeEventListener('click', onUserGesture, true);
                document.removeEventListener('keydown', onUserGesture, true);
                document.removeEventListener('touchstart', onUserGesture, true);
            }
        };
        document.addEventListener('click', onUserGesture, true);
        document.addEventListener('keydown', onUserGesture, true);
        document.addEventListener('touchstart', onUserGesture, true);
    }
}

// 周期性自动刷新页面，防止脚本因不可恢复的 iframe 卡死/超星接口响应异常而死循环
// 默认关闭，需用户在 localStorage 写入 GPTJsSetting.autoRefresh=true 启用
// 默认 30 分钟，可通过 GPTJsSetting.autoRefreshMinutes 改写（最小 5 分钟）
function setupAutoRefresh() {
    var stored = localStorage.getItem('GPTJsSetting.autoRefresh');
    var enabled = stored !== null ? (stored === 'true') : false;
    if (!enabled) return;
    var minutes = parseInt(localStorage.getItem('GPTJsSetting.autoRefreshMinutes'), 10);
    // 本地没配过时回落到云控下发的 autoRefreshMinutes（此前这个值只存在于
    // policy.js 与接口里，客户端从未读取，运营改了不生效）。
    if ((!isFinite(minutes) || minutes < 5)) {
        try {
            if (_cloudPolicy && _cloudPolicy.autoRefreshMinutes) minutes = Number(_cloudPolicy.autoRefreshMinutes);
        } catch { /* 策略未就绪 */ }
    }
    if (!isFinite(minutes) || minutes < 5) minutes = 30;
    if (minutes > 1440) minutes = 1440;
    setTimeout(function () {
        logger('已达到自动刷新时间（' + minutes + '分钟），3 秒后刷新页面...', 'orange');
        setTimeout(function () { try { window.location.reload(); } catch { /* empty */ } }, 3000);
    }, minutes * 60 * 1000);
}

function pollWorkStatus(workIframe, maxWaitMs) {
    maxWaitMs = maxWaitMs || 5000;
    return new Promise(function (resolve) {
        var elapsed = 0;
        var iv = setInterval(function () {
            elapsed += 500;
            var status = '';
            try {
                var $c = $(workIframe).contents();
                status = $c.find('.newTestCon .newTestTitle .testTit_status, .testTit_status, .statusText').text().trim();
                // 兼容传统或无独立状态栏的随堂测验/作业表单：若存在题目或提交按钮，直接判定为待做
                if (!status && $c.find('.CeYan .TiMu, .TiMu, form#form1, .ZyTop, .btnSubmit').length > 0) {
                    status = '待做';
                }
            } catch { /* 忽略跨域或未就绪 */ }
            if (status || elapsed >= maxWaitMs) {
                clearInterval(iv);
                resolve(status);
            }
        }, 500);
    });
}

function startDoPhoneCyWork(index, doms, phoneWeb) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { startDoPhoneCyWork(index, doms, phoneWeb) }, 3000);
        return;
    }
    if (index == doms.length) {
        logger('此页面全部测验已处理完毕！准备进行下一项任务', 'green')
        setTimeout(missonStart, 1200)
        return
    }
    logger('等待测验框架加载...', 'purple')
    pollForElement(doms[index], 'iframe').then(element => {
        let workIframe = element
        if (!workIframe) {
            setTimeout(() => { startDoPhoneCyWork(index, doms, phoneWeb) }, 5000)
            return
        }
        pollWorkStatus(workIframe, 5000).then(workStatus => {
            if (!workStatus) {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                setTimeout(missonStart, 2000)
                return
            }
            var quizTag = (doms && doms.length > 1) ? ('【测验 ' + (index + 1) + '】') : '';
            if (isRedoMode() && workStatus.indexOf("已完成") != -1) {
                logger((quizTag ? quizTag + ' ' : '') + '重做模式下重新处理已完成测验', 'blue')
                $(workIframe).attr('src', phoneWeb)
                var redoWait = 0;
                var redoTimer = setInterval(function () {
                    redoWait += 500;
                    var isReady = false;
                    try {
                        var $c = $(workIframe).contents();
                        if ($c && ($c.find('.Wrappadding, .zquestions, .Py-mian1, form, .btn-ok-bottom').length > 0 || $c.find('.mark_table, .TiMu').length > 0)) isReady = true;
                    } catch { /* 忽略 */ }
                    if (isReady || redoWait >= 15000) {
                        clearInterval(redoTimer);
                        setTimeout(() => { doPhoneWork($(workIframe).contents()) }, 1500)
                    }
                }, 500);
            } else if (workStatus.indexOf("待做") != -1 || workStatus.indexOf("待完成") != -1 || workStatus.indexOf("重做") != -1 || workStatus.indexOf("未达到") != -1) {
                var isRedoStatus = workStatus.indexOf("重做") != -1 || workStatus.indexOf("未达到") != -1
                logger((quizTag ? quizTag + ' ' : '') + (isRedoStatus ? '未达到及格线，准备重做...' : '准备处理此测验...'), 'purple')
                $(workIframe).attr('src', phoneWeb)
                var loadWait = 0;
                var loadTimer = setInterval(function () {
                    loadWait += 500;
                    var isReady = false;
                    try {
                        var $c = $(workIframe).contents();
                        if ($c && ($c.find('.Wrappadding, .zquestions, .Py-mian1, form, .btn-ok-bottom').length > 0 || $c.find('.mark_table, .TiMu').length > 0)) isReady = true;
                    } catch { /* 忽略 */ }
                    if (isReady || loadWait >= 15000) {
                        clearInterval(loadTimer);
                        setTimeout(() => { doPhoneWork($(workIframe).contents()) }, 1500)
                    }
                }, 500);
            } else if (workStatus.indexOf('待批阅') != -1) {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                logger((quizTag ? quizTag + ' ' : '') + '测验待批阅，跳过', 'red')
                setTimeout(() => { startDoPhoneCyWork(index + 1, doms, phoneWeb) }, 5000)
            } else if (workStatus.indexOf('已完成') != -1) {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                logger((quizTag ? quizTag + ' ' : '') + '已完成，跳过', 'green')
                setTimeout(() => { startDoPhoneCyWork(index + 1, doms, phoneWeb) }, 5000)
            } else {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                logger((quizTag ? quizTag + ' ' : '') + '未知状态[' + workStatus + ']，跳过', 'red')
                setTimeout(() => { startDoPhoneCyWork(index + 1, doms, phoneWeb) }, 5000)
            }
        })
    })
}

function startDoCyWork(index, doms) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { startDoCyWork(index, doms) }, 3000);
        return;
    }
    if (index == doms.length) {
        logger('此页面全部测验已处理完毕！准备进行下一项任务')
        setTimeout(missonStart, 5000)
        return
    }
    logger('等待测验框架加载...', 'purple')
    pollForElement(doms[index], 'iframe').then(element => {
        let workIframe = element
        if (!workIframe) {
            setTimeout(() => { startDoCyWork(index, doms) }, 5000)
            return
        }
        pollWorkStatus(workIframe, 5000).then(workStatus => {
            if (!workStatus) {
                try {
                    var $c = $(workIframe).contents();
                    if ($c.find('.CeYan .TiMu, .TiMu, form#form1, .ZyTop, .btnSubmit').length > 0) {
                        logger('测验状态栏未就绪但检测到题目列表，直接开始处理测验...', 'purple');
                        setTimeout(() => { doWork(index, doms, workIframe); }, 2000);
                        return;
                    }
                } catch { /* 忽略 */ }
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                setTimeout(missonStart, 2000)
                return
            }
            var quizTag = (doms && doms.length > 1) ? ('【测验 ' + (index + 1) + '】') : '';
            if (isRedoMode() && workStatus.indexOf("已完成") != -1) {
                logger((quizTag ? quizTag + ' ' : '') + '重做模式下重新处理已完成测验', 'blue')
                setTimeout(() => { doWork(index, doms, workIframe) }, 5000)
            } else if (workStatus.indexOf("待做") != -1 || workStatus.indexOf("待完成") != -1 || workStatus.indexOf("重做") != -1 || workStatus.indexOf("未达到") != -1) {
                var isRedoStatus = workStatus.indexOf("重做") != -1 || workStatus.indexOf("未达到") != -1
                logger((quizTag ? quizTag + ' ' : '') + (isRedoStatus ? '未达到及格线，准备重做...' : '准备处理此测验...'), 'purple')
                setTimeout(() => { doWork(index, doms, workIframe) }, 5000)
            } else if (workStatus.indexOf('待批阅') != -1) {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                logger((quizTag ? quizTag + ' ' : '') + '测验待批阅，跳过', 'red')
                setTimeout(() => { startDoCyWork(index + 1, doms) }, 5000)
            } else if (workStatus.indexOf('已完成') != -1) {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                logger((quizTag ? quizTag + ' ' : '') + '已完成，跳过', 'green')
                setTimeout(() => { startDoCyWork(index + 1, doms) }, 1000)
            } else {
                _mlist.splice(0, 1)
                _domList.splice(0, 1)
                logger((quizTag ? quizTag + ' ' : '') + '未知状态[' + workStatus + ']，跳过', 'red')
                setTimeout(() => { startDoCyWork(index + 1, doms) }, 5000)
            }
        })
    })
}





function missonHomeWork() {
    logger('开始处理作业', 'green')
    let $_homeworktable = $('.mark_table').find('form')
    let TimuList = $_homeworktable.find('.questionLi')
    doHomeWork(0, TimuList)
}

function doHomeWork(index, TiMuList) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { doHomeWork(index, TiMuList) }, 3000);
        return;
    }
    if (index == TiMuList.length) {
        logger('作业题目已全部完成', 'green')
        return
    }

    // 检测是否为阅读理解、完形填空等含有子题的大题
    let $subQuestions = $(TiMuList[index]).find('.reading_answer');
    if ($subQuestions && $subQuestions.length > 0) {
        logger('检测到复合大题（含有 ' + $subQuestions.length + ' 个子题），开始处理子题...', 'blue');
        let parentQuestion = tidyQuestion($(TiMuList[index]).find('h3.mark_name').html() || '');
        let currentTypeName = $(TiMuList[index]).attr('typename') || '阅读理解';
        _currentQuestionMeta = { index: index, total: TiMuList.length, typeName: currentTypeName };
        processSubQuestions(0, $subQuestions, parentQuestion, () => setting.time, () => { doHomeWork(index + 1, TiMuList) });
        return;
    }


    let $titleNode = $(TiMuList[index]).find('.mark_name, h3, .Zy_TItle, .stem_title, .Py-m1-title');
    let _questionFull = $titleNode.length ? $titleNode.html() : ($(TiMuList[index]).find('.mark_name').html() || '');
    let _questionClean = tidyQuestion(_questionFull);
    let _type = resolveQuestionType($(TiMuList[index]), _questionClean);
    let typeName = $(TiMuList[index]).attr('typename');
    if (!typeName) {
        let typeNameMatch = _questionClean.match(/[(（[【]\s*([^)）\]】]+?)[)）\]】]/);
        if (typeNameMatch && typeNameMatch[1]) {
            typeName = typeNameMatch[1].split(/[,，、\s]/)[0];
        }
    }
    if (!typeName) {
        typeName = ['单选题', '多选题', '填空题', '判断题', '简答题', '写作题', '翻译题'][_type] || '未知题型';
    }
    _currentQuestionMeta = { index: index, total: TiMuList.length, typeName: typeName }; _currentQuestionDom = $(TiMuList[index]);
    let _question = _questionClean
        .replace(/^\s*\d+[.、\s]*/, '')
        .replace(/^[(（[【].*?[)）\]】]/, '')
        .trim();
    let _answerTmpArr, _textareaList;
    var check_answer_flag = 0;

    switch (_type) {
        case 0: {
            _answerTmpArr = $(TiMuList[index]).find('.stem_answer').find('.answer_p')

            //遍历选项列表
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '单选题', question: _question, options: mergedAnswers.split('|') })
            //判断题目是否已作答
            for (let i = 0; i < _answerTmpArr.length; i++) {
                if (($(_answerTmpArr[i]).parent().find('span').attr('class') || '').indexOf('check_answer') == -1) {
                    //没有被选择
                } else {
                    if (!isRedoMode()) {
                        logger(index + 1 + '此题已作答，准备切换下一题', 'green')
                        check_answer_flag = 1;
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, 30)
                    } else {
                        logger(index + 1 + '此题已作答，重做模式下重新作答', 'blue')
                        $(_answerTmpArr[i]).parent().click()
                    }
                    break
                }
            }
            if (check_answer_flag == 0) {
                getAnswer(_type, _question).then((agrs) => {
                    let matchedIndexes = findOptionIndexes(_answerTmpArr, agrs, false);
                    if (matchedIndexes.length === 0) {
                        let _a = [];
                        $.each(_answerTmpArr, (i, t) => {
                            _a.push(tidyStr($(t).html()));
                        });
                        let _i = _a.findIndex((item) => item == agrs);
                        if (_i === -1) {
                            _i = findBestFuzzyMatch(_a, agrs);
                        }
                        if (_i !== -1) {
                            matchedIndexes = applyTargetAccuracyControl([_i], _answerTmpArr.length, false);
                        }
                    }
                    if (matchedIndexes.length === 0) {
                        logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                    } else {
                        setTimeout(() => {
                            let targetOpt = _answerTmpArr[matchedIndexes[0]];
                            selectChoiceOption(targetOpt, false);
                            logger('自动答题成功，准备切换下一题', 'green')
                            setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                        }, 300)
                    }
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                    }
                })
            }
        }
            break

        case 1: {
            _answerTmpArr = $(TiMuList[index]).find('.stem_answer').find('.answer_p')
            //遍历选项列表
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '多选题', question: _question, options: mergedAnswers.split('|'), answer_format: "用'|'分割多个答案" })
            //判断题目是否已作答
            for (let i = 0; i < _answerTmpArr.length; i++) {
                if (($(_answerTmpArr[i]).parent().find('span').attr('class') || '').indexOf('check_answer') == -1) {
                    //没有被选择
                } else {
                    if (!isRedoMode()) {
                        logger(index + 1 + '此题已作答，准备切换下一题', 'green')
                        check_answer_flag = 1;
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, 30)
                        break
                    } else {
                        logger(index + 1 + '此题已作答，重做模式下取消旧答案', 'blue')
                        $(_answerTmpArr[i]).parent().click()
                        // 不break，继续取消其他已选选项
                    }
                }
            }
            if (check_answer_flag == 0) {
                getAnswer(_type, _question).then((agrs) => {
                    let matchedIndexes = findOptionIndexes(_answerTmpArr, agrs, true);
                    if (matchedIndexes.length === 0) {
                        let _multiOptions = [];
                        $.each(_answerTmpArr, (i, t) => {
                            _multiOptions.push(tidyStr($(t).html()));
                        });
                        let fallbackIdxs = [];
                        $.each(_answerTmpArr, (i) => {
                            if (agrs.indexOf(_multiOptions[i]) != -1) {
                                fallbackIdxs.push(i);
                            }
                        });
                        if (fallbackIdxs.length === 0) {
                            fallbackIdxs = findFuzzyMatchMultiple(_multiOptions, agrs);
                        }
                        if (fallbackIdxs.length > 0) {
                            matchedIndexes = fallbackIdxs;
                        }
                    }
                    if (matchedIndexes.length === 0) {
                        logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                    } else {
                        matchedIndexes.forEach((idx) => {
                            setTimeout(() => {
                                let targetOpt = _answerTmpArr[idx];
                                selectChoiceOption(targetOpt, true);
                            }, 300);
                        });
                        logger('自动答题成功，准备切换下一题', 'green')
                    }
                    setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                    }
                })
            }
        }
            break
        case 2: {
            _textareaList = findAnswerTextareas($(TiMuList[index]));
            if (!_textareaList || _textareaList.length === 0) {
                _textareaList = findFillBlankInputs($(TiMuList[index]));
            }
            if (!_textareaList || _textareaList.length === 0) {
                _textareaList = $(TiMuList[index]).find('textarea');
            }
            if (!_textareaList || _textareaList.length === 0) {
                logger('未找到填空题输入区域，跳过此题', 'red');
                setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time);
                break;
            }
            let _blankCount = _textareaList.length;
            let formatDesc = _blankCount > 1
                ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                : "直接输出该填空的答案，不要包含任何说明";
            _question = buildPrompt({ type: '填空题', question: _question, answer_format: formatDesc });

            // 完全对齐 main.js：填空题不执行易误判的前置跳过，始终发起 AI 答题并精准写入
            getAnswer(_type, _question).then((agrs) => {
                let _answerTmpArr = splitMultiBlankAnswers(agrs, _blankCount);
                $.each(_textareaList, (i, t) => {
                    let val = _answerTmpArr[i] !== undefined ? _answerTmpArr[i] : (_answerTmpArr[0] || agrs);
                    setTimeout(() => {
                        fillAnswerTextarea(t, val, TiMuList[index]);
                    }, 300 + i * 200);
                });
                setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time + 200 * _blankCount);
                logger('自动答题成功，准备切换下一题', 'green');
            }).catch((agrs) => {
                if (ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                } else {
                    setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time);
                }
            });
            break;
        }
        case 3: {
            _answerTmpArr = $(TiMuList[index]).find('.stem_answer').find('.answer_p')
            //判断题目是否已作答
            for (let i = 0; i < _answerTmpArr.length; i++) {
                if (($(_answerTmpArr[i]).parent().find('span').attr('class') || '').indexOf('check_answer') == -1) {
                    //没有被选择
                } else {
                    if (!isRedoMode()) {
                        logger(index + 1 + '此题已作答，准备切换下一题', 'green')
                        check_answer_flag = 1;
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, 30)
                    } else {
                        logger(index + 1 + '此题已作答，重做模式下重新作答', 'blue')
                        $(_answerTmpArr[i]).parent().click()
                    }
                    break
                }
            }
            if (check_answer_flag == 0) {
                _question = buildPrompt({ type: '判断题', question: _question, answer_format: "只回答正确或错误" })
                getAnswer(_type, _question).then((agrs) => {
                    let _i = matchJudgeOptionIndex(_answerTmpArr, agrs);
                    if (_i === -1) {
                        let judgeResult = parseJudgeAnswer(agrs);
                        if (judgeResult !== null) {
                            let _a = [];
                            $.each(_answerTmpArr, (i, t) => {
                                _a.push($(t).text().trim());
                            });
                            _i = findJudgeOptionIndex(_a, judgeResult === 'true');
                        }
                    }
                    if (_i === -1) {
                        logger('未匹配到正确选项，跳过', 'red')
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                        return
                    }
                    setTimeout(() => {
                        let targetOpt = _answerTmpArr[_i];
                        selectChoiceOption(targetOpt, false);
                    }, 300)
                    logger('自动答题成功，准备切换下一题', 'green')
                    setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                }).catch((agrs) => {
                    if (ne21AnswerErrorShouldStop(agrs)) {
                        logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                    } else {
                        setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time)
                    }
                })
            }
            break
        }
        case 4: {
            let _answerEle = findAnswerTextareas($(TiMuList[index]));
            if (!_answerEle || _answerEle.length === 0) {
                _answerEle = $(TiMuList[index]).find('textarea');
            }
            if (!_answerEle || _answerEle.length === 0) {
                logger((index + 1) + ' 未找到简答题作答区域，跳过此题', 'red');
                setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time);
                break;
            }
            let jdt = buildPrompt({ type: typeName || '简答题', question: _question, answer_format: "用50字简要回答" });
            getAnswer(_type, jdt).then((agrs) => {
                $.each(_answerEle, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, TiMuList[index]);
                    }, 300 + i * 200);
                });
                logger('自动答题成功，准备切换下一题', 'green');
                setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time + 200 * _answerEle.length);
            }).catch((agrs) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                } else {
                    setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
                }
            });
        }
            break
        case 5: {
            let _answerEle5 = findAnswerTextareas($(TiMuList[index]));
            if (!_answerEle5 || _answerEle5.length === 0) {
                _answerEle5 = $(TiMuList[index]).find('textarea');
            }
            if (!_answerEle5 || _answerEle5.length === 0) {
                logger((index + 1) + ' 未找到写作题文本框，跳过此题', 'red');
                setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
                break;
            }
            let jdt5 = buildPrompt({ type: typeName || '写作题', question: _question, answer_format: "用英文根据题目进行写作" });
            getAnswer(_type, jdt5).then((agrs) => {
                $.each(_answerEle5, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, TiMuList[index]);
                    }, 300 + i * 200);
                });
                logger('自动答题成功，准备切换下一题', 'green');
                setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time + 200 * _answerEle5.length);
            }).catch((agrs) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                } else {
                    setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
                }
            });
        }
            break
        case 6: {
            let _answerEle6 = findAnswerTextareas($(TiMuList[index]));
            if (!_answerEle6 || _answerEle6.length === 0) {
                _answerEle6 = $(TiMuList[index]).find('textarea');
            }
            if (!_answerEle6 || _answerEle6.length === 0) {
                logger((index + 1) + ' 未找到翻译题文本框，跳过此题', 'red');
                setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
                break;
            }
            let jdt6 = buildPrompt({ type: typeName || '翻译题', question: _question, answer_format: "中文英文互译" });
            getAnswer(_type, jdt6).then((agrs) => {
                $.each(_answerEle6, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, TiMuList[index]);
                    }, 300 + i * 200);
                });
                logger('自动答题成功，准备切换下一题', 'green');
                setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time + 200 * _answerEle6.length);
            }).catch((agrs) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                } else {
                    setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
                }
            });
        }
            break
        default: {
            if (_type === undefined) {
                logger('无法识别题型：' + typeName + '，跳过此题', 'red');
                setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
            } else {
                _textareaList = findAnswerTextareas($(TiMuList[index]));
                if (!_textareaList || _textareaList.length === 0) {
                    _textareaList = $(TiMuList[index]).find('textarea');
                }
                if (_textareaList && _textareaList.length > 0) {
                    logger('检测到文本输入区域，尝试回答', 'green');
                    let jdt = buildPrompt({ type: typeName || '未知题型', question: _question, answer_format: "请根据题目作答" });
                    getAnswer(_type || 4, jdt).then((agrs) => {
                        $.each(_textareaList, (i, t) => {
                            setTimeout(() => {
                                fillAnswerTextarea(t, agrs, TiMuList[index]);
                            }, 300 + i * 200);
                        });
                        logger('自动答题成功，准备切换下一题', 'green');
                        setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time + 200 * _textareaList.length);
                    }).catch((agrs) => {
                        if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                            logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                        } else {
                            setTimeout(() => { doHomeWork(index + 1, TiMuList); }, setting.time);
                        }
                    });
                } else {
                    logger('无法处理此题型：' + typeName + '，跳过此题', 'red');
                    setTimeout(() => { doHomeWork(index + 1, TiMuList) }, setting.time);
                }
            }
        }
    }
}

function missonExam() {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(missonExam, 3000);
        return;
    }
    let $_examtable = $('.mark_table').find('.whiteDiv');
    let _questionFull = tidyStr(($_examtable.find('h3.mark_name').html() || '').trim());
    let _qType = resolveQuestionType($_examtable, _questionFull);
    let typeName = '';
    let typeNameMatch = _questionFull.match(/[(（[【]\s*([^)）\]】]+?)[)）\]】]/);
    if (typeNameMatch && typeNameMatch[1]) {
        typeName = typeNameMatch[1].split(/[,，、\s]/)[0];
    }
    if (!typeName) {
        typeName = ['单选题', '多选题', '填空题', '判断题', '简答题', '写作题', '翻译题'][_qType] || '未知题型';
    }
    // 尝试从导航栏获取当前题号
    let _examCurIdx = null;
    try {
        let $curLi = $('.mark_table .mark_li_list li.active, .mark_table .mark_li_list li.current');
        if ($curLi.length) _examCurIdx = parseInt($curLi.text().trim()) - 1;
    } catch { /* empty */ }
    _currentQuestionMeta = { index: isFinite(_examCurIdx) ? _examCurIdx : null, total: null, typeName: typeName };
    let _question = tidyQuestion(_questionFull)
        .replace(/^\s*\d+[.、\s]*/, '')
        .replace(/^[(（[【].*?[)）\]】]/, '')
        .trim();
    let $_ansdom = $_examtable.find('#submitTest').find('.stem_answer');

    // 检测是否为阅读理解、完形填空等含有子题的大题
    let $subQuestions = $_ansdom.find('.reading_answer');
    if ($subQuestions && $subQuestions.length > 0) {
        logger('检测到复合大题（含有 ' + $subQuestions.length + ' 个子题），开始处理子题...', 'blue');
        let parentQuestion = tidyQuestion($_examtable.find('h3.mark_name').html() || '');
        _currentQuestionMeta = { index: _examCurIdx, total: null, typeName: typeName || '阅读理解' }; _currentQuestionDom = $_examtable;
        processSubQuestions(0, $subQuestions, parentQuestion, () => setting.time, () => { toNextExam() });
        return;
    }

    let _answerTmpArr;
    switch (_qType) {
        case 0: {
            _answerTmpArr = $_ansdom.find('.clearfix.answerBg .fl.answer_p')
            // 已作答前置检查：兼容 check_answer 与 check_answer_dx（indexOf('check_answer') 都能命中）
            let _answeredIdxE0 = -1
            for (let _ai = 0; _ai < _answerTmpArr.length; _ai++) {
                let _cls = $(_answerTmpArr[_ai]).parent().find('span').attr('class') || ''
                if (_cls.indexOf('check_answer') !== -1) { _answeredIdxE0 = _ai; break }
            }
            if (_answeredIdxE0 !== -1 && !isRedoMode()) {
                logger('此题已作答，准备切换下一题', 'green')
                toNextExam()
                break
            }
            if (_answeredIdxE0 !== -1 && isRedoMode()) {
                logger('此题已作答，重做模式下重新作答', 'blue')
                $(_answerTmpArr[_answeredIdxE0]).parent().click()
            }
            //遍历选项列表
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '单选题', question: _question, options: mergedAnswers.split('|') })
            getAnswer(_qType, _question).then((agrs) => {
                let matchedIndexes = findOptionIndexes(_answerTmpArr, agrs, false);
                if (matchedIndexes.length === 0) {
                    let _a = [];
                    $.each(_answerTmpArr, (i, t) => {
                        _a.push(tidyStr($(t).html()));
                    });
                    let _i = _a.findIndex((item) => item == agrs);
                    if (_i === -1) {
                        _i = findBestFuzzyMatch(_a, agrs);
                    }
                    if (_i !== -1) {
                        matchedIndexes = applyTargetAccuracyControl([_i], _answerTmpArr.length, false);
                    }
                }
                if (matchedIndexes.length === 0) {
                    logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                    setTimeout(toNextExam, 5000)
                } else {
                    setTimeout(() => {
                        selectChoiceOption(_answerTmpArr[matchedIndexes[0]], false);
                        logger('自动答题成功，准备切换下一题', 'green')
                        toNextExam()
                    }, 300)
                }
            }).catch((agrs) => {
                if (ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                } else {
                    toNextExam()
                }
            })
        }
            break
        case 1: {
            _answerTmpArr = $_ansdom.find('.clearfix.answerBg .fl.answer_p')
            // 已作答前置检查（多选用 check_answer_dx）
            let _alreadyAnsweredE1 = $_ansdom.find('.clearfix.answerBg span.check_answer_dx, .clearfix.answerBg span.check_answer').length > 0
            if (_alreadyAnsweredE1 && !isRedoMode()) {
                logger('此题已作答，准备切换下一题', 'green')
                toNextExam()
                break
            }
            if (_alreadyAnsweredE1 && isRedoMode()) {
                logger('此题已作答，重做模式下重新作答', 'blue')
                $.each(_answerTmpArr, function (_i2, _t2) {
                    var _cls2 = $(_t2).parent().find('span').attr('class') || ''
                    if (_cls2.indexOf('check_answer') !== -1) {
                        $(_t2).parent().click()
                    }
                })
            }
            //遍历选项列表
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '多选题', question: _question, options: mergedAnswers.split('|'), answer_format: "用'|'分割多个答案" })
            getAnswer(_qType, _question).then((agrs) => {
                let matchedIndexes = findOptionIndexes(_answerTmpArr, agrs, true);
                if (matchedIndexes.length === 0) {
                    let _multiOptions = [];
                    $.each(_answerTmpArr, (i, t) => {
                        _multiOptions.push(tidyStr($(t).html()));
                    });
                    let fallbackIdxs = [];
                    $.each(_answerTmpArr, (i) => {
                        if (agrs.indexOf(_multiOptions[i]) != -1) {
                            fallbackIdxs.push(i);
                        }
                    });
                    if (fallbackIdxs.length === 0) {
                        fallbackIdxs = findFuzzyMatchMultiple(_multiOptions, agrs);
                    }
                    if (fallbackIdxs.length > 0) {
                        matchedIndexes = fallbackIdxs;
                    }
                }
                if (matchedIndexes.length === 0) {
                    logger('AI未能完美匹配正确答案，请尝试更换更高级模型或手动选择，跳过此题', 'red')
                } else {
                    matchedIndexes.forEach((idx) => {
                        setTimeout(() => {
                            selectChoiceOption(_answerTmpArr[idx], true);
                        }, 300);
                    });
                    logger('自动答题成功，准备切换下一题', 'green')
                }
                toNextExam()
            }).catch((agrs) => {
                if (ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                } else {
                    toNextExam()
                }
            })
        }
            break
        case 2: {
            let _textareaList = findAnswerTextareas($_ansdom && $_ansdom.length ? $_ansdom : $_examtable);
            if (!_textareaList || _textareaList.length === 0) {
                _textareaList = findFillBlankInputs($_ansdom && $_ansdom.length ? $_ansdom : $_examtable);
            }
            if (!_textareaList || _textareaList.length === 0) {
                _textareaList = ($_ansdom && $_ansdom.length ? $_ansdom : $_examtable).find('textarea');
            }
            if (!_textareaList || _textareaList.length === 0) {
                logger('未找到填空题输入区域，跳过此题', 'red');
                toNextExam();
                break;
            }
            let _blankCount = _textareaList.length || 1;
            let formatDesc = _blankCount > 1
                ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                : "直接输出该填空的答案，不要包含任何说明";
            _question = buildPrompt({ type: '填空题', question: _question, answer_format: formatDesc });
            getAnswer(_qType, _question).then((agrs) => {
                let _answerTmpArr = splitMultiBlankAnswers(agrs, _blankCount);
                $.each(_textareaList, (i, t) => {
                    let val = _answerTmpArr[i] || '';
                    setTimeout(() => { fillAnswerTextarea(t, val, $_examtable); }, 300 + i * 200);
                });
                logger('自动答题成功，准备切换下一题', 'green');
                toNextExam();
            }).catch((agrs) => {
                if (ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                } else {
                    toNextExam()
                }
            });
            break;
        }
        case 3: {
            _answerTmpArr = $_ansdom.find('.clearfix.answerBg .fl.answer_p')
            // 判断题目是否已作答
            let _answeredIdxE3 = -1
            for (let _ai = 0; _ai < _answerTmpArr.length; _ai++) {
                let _cls = $(_answerTmpArr[_ai]).parent().find('span').attr('class') || ''
                if (_cls.indexOf('check_answer') !== -1) { _answeredIdxE3 = _ai; break }
            }
            if (_answeredIdxE3 !== -1 && !isRedoMode()) {
                logger('此题已作答，准备切换下一题', 'green')
                toNextExam()
                break
            }
            if (_answeredIdxE3 !== -1 && isRedoMode()) {
                logger('此题已作答，重做模式下重新作答', 'blue')
                $(_answerTmpArr[_answeredIdxE3]).parent().click()
            }
            let jdt = buildPrompt({ type: '判断题', question: _question, answer_format: "只回答正确或错误" })
            getAnswer(_qType, jdt).then((agrs) => {
                let _i = matchJudgeOptionIndex(_answerTmpArr, agrs);
                if (_i === -1) {
                    let judgeResult = parseJudgeAnswer(agrs);
                    if (judgeResult !== null) {
                        let _a = [];
                        $.each(_answerTmpArr, (i, t) => {
                            _a.push($(t).text().trim());
                        });
                        _i = findJudgeOptionIndex(_a, judgeResult === 'true');
                    }
                    if (_i !== -1) {
                        _i = applyJudgeTargetAccuracyControl(_i, _answerTmpArr.length);
                    }
                }
                if (_i === -1) {
                    logger('未匹配到正确选项，跳过', 'red')
                    toNextExam()
                    return
                }
                setTimeout(() => {
                    selectChoiceOption(_answerTmpArr[_i], false);
                }, 300);
                logger('自动答题成功，准备切换下一题', 'green')
                toNextExam()
            }).catch((agrs) => {
                if (ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red')
                } else {
                    toNextExam()
                }
            })
            break
        }
        case 4: {
            let _answerEle = findAnswerTextareas($_ansdom && $_ansdom.length ? $_ansdom : $_examtable)
            if (!_answerEle || _answerEle.length === 0) {
                _answerEle = ($_ansdom && $_ansdom.length ? $_ansdom : $_examtable).find('textarea');
            }
            if (!_answerEle || _answerEle.length === 0) { toNextExam(); break }
            let jdt = buildPrompt({ type: typeName || '简答题', question: _question, answer_format: "用50字简要回答" })
            getAnswer(_qType, jdt).then((agrs) => {
                $.each(_answerEle, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, $_examtable);
                    }, 300 + i * 200);
                });
                setTimeout(toNextExam, 300 + 200 * _answerEle.length);
            }).catch((agrs) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                } else {
                    toNextExam();
                }
            });
        }
            break
        case 5: {
            let _answerEle = findAnswerTextareas($_ansdom && $_ansdom.length ? $_ansdom : $_examtable)
            if (!_answerEle || _answerEle.length === 0) {
                _answerEle = ($_ansdom && $_ansdom.length ? $_ansdom : $_examtable).find('textarea');
            }
            if (!_answerEle || _answerEle.length === 0) { toNextExam(); break }
            let jdt = buildPrompt({ type: typeName || '写作题', question: _question, answer_format: "用英文根据题目进行写作" })
            getAnswer(_qType, jdt).then((agrs) => {
                $.each(_answerEle, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, $_examtable);
                    }, 300 + i * 200);
                });
                setTimeout(toNextExam, 300 + 200 * _answerEle.length);
            }).catch((agrs) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                } else {
                    toNextExam();
                }
            });
        }
            break
        case 6: {
            let _answerEle = findAnswerTextareas($_ansdom && $_ansdom.length ? $_ansdom : $_examtable)
            if (!_answerEle || _answerEle.length === 0) {
                _answerEle = ($_ansdom && $_ansdom.length ? $_ansdom : $_examtable).find('textarea');
            }
            if (!_answerEle || _answerEle.length === 0) { toNextExam(); break }
            let jdt = buildPrompt({ type: typeName || '翻译题', question: _question, answer_format: "中文英文互译" })
            getAnswer(_qType, jdt).then((agrs) => {
                $.each(_answerEle, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, $_examtable);
                    }, 300 + i * 200);
                });
                setTimeout(toNextExam, 300 + 200 * _answerEle.length);
            }).catch((agrs) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                } else {
                    toNextExam();
                }
            });
        }
            break
        default: {
            if (_qType === undefined) {
                logger('无法识别题型：' + typeName + '，跳过此题', 'red')
                toNextExam()
            } else {
                let textareas = findAnswerTextareas($_ansdom && $_ansdom.length ? $_ansdom : $_examtable);
                if (!textareas || textareas.length === 0) {
                    textareas = ($_ansdom && $_ansdom.length ? $_ansdom : $_examtable).find('textarea');
                }
                if (textareas && textareas.length > 0) {
                    logger('检测到主观题/材料题文本输入区域，尝试回答', 'green');
                    let jdt = buildPrompt({ type: typeName || '主观题', question: _question, answer_format: "请根据题目详细回答" });
                    getAnswer(_qType || 4, jdt).then((agrs) => {
                        $.each(textareas, (i, t) => {
                            setTimeout(() => { fillAnswerTextarea(t, agrs, $_examtable); }, 300 + i * 200);
                        });
                        logger('自动答题成功，准备切换下一题', 'green');
                        setTimeout(toNextExam, 300 + 200 * textareas.length);
                    }).catch((agrs) => {
                        if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                            logger('⛔ ' + ne21AnswerStopReason(agrs) + '，自动答题已停止', 'red');
                        } else {
                            toNextExam();
                        }
                    });
                } else {
                    logger('无法处理此题型：' + typeName + '，跳过此题', 'red');
                    toNextExam();
                }
            }
        }
    }
}


function toNextExam() {
    if (localStorage.getItem('GPTJsSetting.examTurn') === 'true') {
        let $_examtable = $('.mark_table').find('.whiteDiv')
        let $nextbtn = $_examtable.find('.nextDiv a.jb_btn')
        setTimeout(() => {
            $nextbtn.click()
        }, setting.examTurnTime ? 2000 + (Math.floor(Math.random() * 5 + 1) * 1000) : 2000)
    } else {
        logger('用户设置不自动跳转下一题，请手动点击', 'blue')
    }
}

// ============== 整卷预览页面（一页多题）自动答题 ==============
// 适配 /mooc-ans/mooc2/exam/preview 与 /ans/mooc2/exam/preview
// 不自动跳转、不自动交卷；叠加随机抖动
function missonExamPreview() {
    logger('进入整卷预览页面，开始处理考试', 'green')
    let TiMuList = $('.mark_table').find('.questionLi')
    if (!TiMuList || TiMuList.length === 0) {
        logger('未解析到题目，请确认页面已渲染', 'red')
        return
    }
    logger('共解析到 ' + TiMuList.length + ' 道题', 'blue')
    doExamPreview(0, TiMuList)
}

// 题间间隔：基础 setting.time + 0~1500ms 抖动，模仿真人节奏
function getExamPreviewDelay() {
    let base = (setting && setting.time) ? setting.time : 2500
    return base + Math.floor(Math.random() * 1500)
}

// 解析 questionLi 题型：返回 { type: 0~6 | undefined, typeName: string }
function getExamPreviewType($timu) {
    let prefixText = $timu.find('.colorShallow').text() || $timu.find('.mark_name').text() || '';
    let resolved = resolveQuestionType($timu, prefixText);
    let typeName = $timu.attr('typename') || '';
    if (!typeName && prefixText) {
        let m = prefixText.match(/[(（[【]\s*([^)）\]】]+?)[)）\]】]/);
        if (m && m[1]) typeName = m[1].split(/[,，、\s]/)[0];
    }
    if (!typeName && resolved !== undefined) {
        typeName = ['单选题', '多选题', '填空题', '判断题', '简答题', '写作题', '翻译题'][resolved] || '未知';
    }
    let qid = $timu.attr('data') || $timu.find('.questionId').val() || $timu.find('input.questionId').val();
    if (resolved === undefined && qid) {
        let typeVal = $('[name="type' + qid + '"]').val();
        if (typeVal !== undefined && typeVal !== null && typeVal !== '') {
            let n = parseInt(typeVal);
            if (!isNaN(n) && n >= 0 && n <= 6) {
                return { type: n, typeName: typeName || ('类型' + n) };
            }
        }
    }
    return { type: resolved, typeName: typeName || '未知' };
}

function doExamPreview(index, TiMuList) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { doExamPreview(index, TiMuList) }, 3000);
        return;
    }
    if (index >= TiMuList.length) {
        logger('整卷预览答题已完成，请人工核对后手动交卷', 'green')
        return
    }

    // 检测是否为阅读理解、完形填空等含有子题的大题
    let $subQuestions = $(TiMuList[index]).find('.reading_answer');
    if ($subQuestions && $subQuestions.length > 0) {
        logger('检测到复合大题（含有 ' + $subQuestions.length + ' 个子题），开始处理子题...', 'blue');
        let parentQuestion = tidyQuestion($(TiMuList[index]).find('h3.mark_name').html() || '');
        let currentTypeName = $(TiMuList[index]).attr('typename') || '阅读理解';
        _currentQuestionMeta = { index: index, total: TiMuList.length, typeName: currentTypeName };
        processSubQuestions(0, $subQuestions, parentQuestion, getExamPreviewDelay, () => { doExamPreview(index + 1, TiMuList) });
        return;
    }
    let $timu = $(TiMuList[index])
    let typeInfo = getExamPreviewType($timu)
    let _type = typeInfo.type
    let typeName = typeInfo.typeName
    let _questionFull = $timu.find('.mark_name').html() || ''
    let _question = tidyQuestion(_questionFull)
        .replace(/^\s*\d+[.、\s]*/, '')
        .replace(/^[(（[【].*?[)）\]】]/, '')
        .trim();
    let _answerTmpArr, _textareaList
    let alreadyAnswered = 0
    let prefix = '第' + (index + 1) + '题: '

    function nextSoon() {
        setTimeout(function () { doExamPreview(index + 1, TiMuList) }, getExamPreviewDelay())
    }
    function nextFast() {
        setTimeout(function () { doExamPreview(index + 1, TiMuList) }, 30)
    }

    _currentQuestionMeta = { index: index, total: TiMuList.length, typeName: typeName }

    if (_type === undefined) {
        logger(prefix + '无法识别题型(' + typeName + ')，跳过此题', 'red')
        return nextSoon()
    }

    switch (_type) {
        case 0: {
            _answerTmpArr = $timu.find('.answerBg .answer_p')
            if (!_answerTmpArr || _answerTmpArr.length === 0) {
                logger(prefix + '未找到选项，跳过', 'red')
                return nextSoon()
            }
            let mergedAnswers = []
            _answerTmpArr.each(function () {
                mergedAnswers.push(tidyOptionText($(this).text()))
            })
            let prompt = buildPrompt({ type: '单选题', question: _question, options: mergedAnswers })
            for (let i = 0; i < _answerTmpArr.length; i++) {
                let cls = $(_answerTmpArr[i]).parent().find('span').attr('class') || ''
                if (cls.indexOf('check_answer') !== -1) {
                    if (!isRedoMode()) {
                        logger(prefix + '已作答，跳过', 'green')
                        alreadyAnswered = 1
                    } else {
                        logger(prefix + '已作答，重做模式下重新作答', 'blue')
                        $(_answerTmpArr[i]).parent().click()
                    }
                    break
                }
            }
            if (alreadyAnswered) return nextFast()
            getAnswer(_type, prompt).then(function (agrs) {
                let matchedIndexes = findOptionIndexes(_answerTmpArr, agrs, false)
                if (matchedIndexes.length === 0) {
                    let _a = [];
                    $.each(_answerTmpArr, (i, t) => {
                        _a.push(tidyStr($(t).html()));
                    });
                    let _i = _a.findIndex((item) => item == agrs);
                    if (_i === -1) {
                        _i = findBestFuzzyMatch(_a, agrs);
                    }
                    if (_i !== -1) {
                        matchedIndexes = [_i];
                    }
                }
                if (matchedIndexes.length === 0) {
                    logger(prefix + 'AI无法完美匹配正确答案，请手动选择', 'red')
                    return nextSoon()
                }
                setTimeout(function () {
                    selectChoiceOption(_answerTmpArr[matchedIndexes[0]], false)
                    logger(prefix + '自动答题成功', 'green')
                    nextSoon()
                }, 300)
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            })
            break
        }
        case 1: {
            _answerTmpArr = $timu.find('.answerBg .answer_p')
            if (!_answerTmpArr || _answerTmpArr.length === 0) {
                logger(prefix + '未找到选项，跳过', 'red')
                return nextSoon()
            }
            let mergedAnswers = []
            _answerTmpArr.each(function () {
                mergedAnswers.push(tidyOptionText($(this).text()))
            })
            let prompt = buildPrompt({ type: '多选题', question: _question, options: mergedAnswers, answer_format: "用'|'分割多个答案" })
            for (let i = 0; i < _answerTmpArr.length; i++) {
                let cls = $(_answerTmpArr[i]).parent().find('span').attr('class') || ''
                if (cls.indexOf('check_answer') !== -1) {
                    if (!isRedoMode()) {
                        logger(prefix + '已作答，跳过', 'green')
                        alreadyAnswered = 1
                        break
                    } else {
                        logger(prefix + '已作答，重做模式下取消旧答案', 'blue')
                        $(_answerTmpArr[i]).parent().click()
                    }
                }
            }
            if (alreadyAnswered) return nextFast()
            getAnswer(_type, prompt).then(function (agrs) {
                let matchedIndexes = findOptionIndexes(_answerTmpArr, agrs, true)
                if (matchedIndexes.length === 0) {
                    let _multiOptions = [];
                    $.each(_answerTmpArr, (i, t) => {
                        _multiOptions.push(tidyStr($(t).html()));
                    });
                    let fallbackIdxs = [];
                    $.each(_answerTmpArr, (i) => {
                        if (agrs.indexOf(_multiOptions[i]) != -1) {
                            fallbackIdxs.push(i);
                        }
                    });
                    if (fallbackIdxs.length === 0) {
                        fallbackIdxs = findFuzzyMatchMultiple(_multiOptions, agrs);
                    }
                    if (fallbackIdxs.length > 0) {
                        matchedIndexes = fallbackIdxs;
                    }
                }
                if (matchedIndexes.length === 0) {
                    logger(prefix + 'AI无法完美匹配正确答案，请手动选择', 'red')
                } else {
                    matchedIndexes.forEach(function (idx) {
                        setTimeout(function () {
                            selectChoiceOption(_answerTmpArr[idx], true)
                        }, 300)
                    })
                    logger(prefix + '自动答题成功', 'green')
                }
                nextSoon()
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            })
            break
        }
        case 2: {
            _textareaList = findAnswerTextareas($timu);
            if (!_textareaList || _textareaList.length === 0) {
                _textareaList = findFillBlankInputs($timu);
            }
            if (!_textareaList || _textareaList.length === 0) {
                logger(prefix + '未找到填空文本框，跳过', 'red');
                return nextSoon();
            }
            let _blankCount = _textareaList.length || 1;
            let formatDesc = _blankCount > 1
                ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                : "直接输出该填空的答案，不要包含任何说明";
            let prompt = buildPrompt({ type: '填空题', question: _question, answer_format: formatDesc });
            getAnswer(_type, prompt).then(function (agrs) {
                let parts = splitMultiBlankAnswers(agrs, _blankCount);
                $.each(_textareaList, function (i, t) {
                    let val = parts[i] || '';
                    setTimeout(function () {
                        fillAnswerTextarea(t, val, $timu);
                    }, 300 + i * 200);
                });
                logger(prefix + '自动答题成功', 'green');
                nextSoon();
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            });
            break;
        }
        case 3: {
            _answerTmpArr = $timu.find('.answerBg .answer_p')
            if (!_answerTmpArr || _answerTmpArr.length === 0) {
                logger(prefix + '未找到判断选项，跳过', 'red')
                return nextSoon()
            }
            for (let i = 0; i < _answerTmpArr.length; i++) {
                let cls = $(_answerTmpArr[i]).parent().find('span').attr('class') || ''
                if (cls.indexOf('check_answer') !== -1) {
                    if (!isRedoMode()) {
                        logger(prefix + '已作答，跳过', 'green')
                        alreadyAnswered = 1
                    } else {
                        logger(prefix + '已作答，重做模式下重新作答', 'blue')
                        $(_answerTmpArr[i]).parent().click()
                    }
                    break
                }
            }
            if (alreadyAnswered) return nextFast()
            let prompt = buildPrompt({ type: '判断题', question: _question, answer_format: "只回答正确或错误" })
            getAnswer(_type, prompt).then(function (agrs) {
                let _i = matchJudgeOptionIndex(_answerTmpArr, agrs)
                if (_i === -1) {
                    let judgeResult = parseJudgeAnswer(agrs);
                    if (judgeResult !== null) {
                        let _a = [];
                        $.each(_answerTmpArr, (i, t) => {
                            _a.push($(t).text().trim());
                        });
                        _i = findJudgeOptionIndex(_a, judgeResult === 'true');
                    }
                }
                if (_i === -1) {
                    logger(prefix + '答案匹配出错，跳过', 'red')
                    return nextSoon()
                }
                setTimeout(function () {
                    selectChoiceOption(_answerTmpArr[_i], false)
                    logger(prefix + '自动答题成功', 'green')
                    nextSoon()
                }, 300)
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            })
            break
        }
        case 4: {
            let _answerEle = findAnswerTextareas($timu)
            if (!_answerEle || _answerEle.length === 0) {
                logger(prefix + '未找到答题文本框，跳过', 'red')
                return nextSoon()
            }
            let prompt = buildPrompt({ type: typeName || '简答题', question: _question, answer_format: "用50字简要回答" })
            getAnswer(_type, prompt).then(function (agrs) {
                $.each(_answerEle, function (i, t) {
                    setTimeout(function () {
                        fillAnswerTextarea(t, agrs, $timu)
                    }, 300 + i * 200)
                })
                logger(prefix + '自动答题成功', 'green')
                nextSoon()
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            })
            break
        }
        case 5: {
            let _answerEle = findAnswerTextareas($timu)
            if (!_answerEle || _answerEle.length === 0) {
                logger(prefix + '未找到答题文本框，跳过', 'red')
                return nextSoon()
            }
            let prompt = buildPrompt({ type: typeName || '写作题', question: _question, answer_format: "用英文根据题目进行写作" })
            getAnswer(_type, prompt).then(function (agrs) {
                $.each(_answerEle, function (i, t) {
                    setTimeout(function () {
                        fillAnswerTextarea(t, agrs, $timu)
                    }, 300 + i * 200)
                })
                logger(prefix + '自动答题成功', 'green')
                nextSoon()
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            })
            break
        }
        case 6: {
            let _answerEle = findAnswerTextareas($timu)
            if (!_answerEle || _answerEle.length === 0) {
                logger(prefix + '未找到答题文本框，跳过', 'red')
                return nextSoon()
            }
            let prompt = buildPrompt({ type: typeName || '翻译题', question: _question, answer_format: "中文英文互译" })
            getAnswer(_type, prompt).then(function (agrs) {
                $.each(_answerEle, function (i, t) {
                    setTimeout(function () {
                        fillAnswerTextarea(t, agrs, $timu)
                    }, 300 + i * 200)
                })
                logger(prefix + '自动答题成功', 'green')
                nextSoon()
            }).catch(function (agrs) {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(agrs)) {
                    logger(ne21AnswerStopReason(agrs), 'red');
                    return;
                }
                nextSoon();
            })
            break
        }
        default: {
            logger(prefix + '无法处理此题型: ' + typeName + '，跳过', 'red')
            nextSoon()
        }
    }
}

function refreshCourseList() {
    let _p = parseUrlParams()
    return new Promise((resolve, reject) => {
        $.ajax({
            url: _l.protocol + '//' + _l.host + '/mycourse/studentstudycourselist?courseId=' + _p['courseid'] + '&chapterId=' + _p['knowledgeid'] + '&clazzid=' + _p['clazzid'] + '&mooc2=1',
            type: 'GET',
            dataType: 'html',
            timeout: 10000,
            success: function (res) {
                resolve(res)
            },
            error: function (xhr, status) {
                reject(new Error(status === 'timeout' ? '课程目录请求超时（10秒）' : '课程目录请求失败（' + (xhr.status || status) + '）'))
            }
        })
    })

}

// 注：这里原有 showThinking / hideThinking 一对函数（含 _ne21ThinkingCount 计数器），
// 但全工程无任何调用点，对应的 .ne21-active 样式也不存在，属历史遗留死代码，已删除。
// 构造结构化提示词，使 AI 能更精确地理解题目并回答。
// 入参 opts:
//   - type:          题型(如 单选题/多选题/判断题/填空题/简答题/写作题/翻译题)
//   - question:      题干
//   - options:       选项数组(可选)
//   - answer_format: 答案格式说明(可选,如 "用'|'分割多个答案"、"只回答正确或错误")
// 返回 { payload, display }:
//   - payload: 发送给 AI 的 JSON 字符串(更精确,便于 AI 解析)
//   - display: 用于用户日志展示的简洁文本(仅含题干与选项,不含题型/答案格式等元信息)
function buildPrompt(opts) {
    opts = opts || {}
    let q = opts.question != null ? String(opts.question) : ''
    let payloadObj = {}
    if (opts.type) payloadObj.type = String(opts.type)
    if (opts.answer_format) payloadObj.answer_format = String(opts.answer_format)
    payloadObj.question = q
    if (Array.isArray(opts.options) && opts.options.length > 0) {
        payloadObj.options = opts.options.map(function (s) { return String(s == null ? '' : s).trim() })
    }
    let payload = JSON.stringify(payloadObj, null, 2)
    let display = q
    if (payloadObj.options && payloadObj.options.length) {
        display += '\n' + payloadObj.options.join(' | ')
    }
    // 面板设置项 GPTJsSetting.visionMode（默认开启）。
    // 历史实现从未读取它：复选框纯装饰，题干图片始终会被提取并上传给视觉模型。
    // 现在真正生效——关掉它就不再提取/上传任何图片。
    let _visionEnabled = true;
    try { _visionEnabled = localStorage.getItem('GPTJsSetting.visionMode') !== 'false'; } catch { /* 保持默认开启 */ }
    let images = [];
    if (_visionEnabled) {
        if (Array.isArray(opts.images)) {
            images = opts.images;
        } else if (opts.dom) {
            images = extractQuestionImages($(opts.dom));
        } else if (_currentQuestionDom) {
            images = extractQuestionImages($(_currentQuestionDom));
        }
    }
    return { payload: payload, display: display, images: images, options: payloadObj.options || [] }
}

// 全局复用函数：递归处理复合大题的子小题
function processSubQuestions(subIndex, $subQuestions, parentQuestion, getDelay, onComplete) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { processSubQuestions(subIndex, $subQuestions, parentQuestion, getDelay, onComplete) }, 3000);
        return;
    }
    let delay = typeof getDelay === 'function' ? getDelay() : (setting.time || 2500);
    if (subIndex === $subQuestions.length) {
        logger('该大题所有子题已处理完毕，准备切换下一题', 'green');
        setTimeout(onComplete, delay);
        return;
    }

    let $subQ = $($subQuestions[subIndex]);
    let subQuestionText = $subQ.find('.reader_answer_tit').text().replace(/^\(\d+\)\s*/, '').trim();
    let fullQuestion = "[大题背景]\n" + parentQuestion + "\n\n[小题]\n" + subQuestionText;

    let subTypeVal = parseInt($subQ.attr('qtype'));
    let readTypeText = $subQ.find('.read_type').text().trim();
    let subType = undefined;
    if (!isNaN(subTypeVal)) {
        subType = subTypeVal;
    } else if (readTypeText.indexOf('单选') !== -1) {
        subType = 0;
    } else if (readTypeText.indexOf('多选') !== -1) {
        subType = 1;
    } else if (readTypeText.indexOf('填空') !== -1) {
        subType = 2;
    } else if (readTypeText.indexOf('判断') !== -1) {
        subType = 3;
    } else if (readTypeText.indexOf('简答') !== -1 || readTypeText.indexOf('问答') !== -1 || readTypeText.indexOf('论述') !== -1) {
        subType = 4;
    }

    if (subType === undefined) {
        logger('子题 ' + (subIndex + 1) + ' 题型未知，跳过', 'red');
        setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
        return;
    }

    // 查找可选项的通用逻辑
    let $options = $subQ.find('.answerBg .answer_p');
    if ($options.length === 0) $options = $subQ.find('.stem_answer .answer_p');

    // 已作答检测（仅针对客观选择/判断题）
    let hasAnswered = false;
    if (subType === 0 || subType === 1 || subType === 3) {
        for (let i = 0; i < $options.length; i++) {
            let cls = $($options[i]).parent().find('span').attr('class') || '';
            if (cls.indexOf('check_answer') !== -1) {
                hasAnswered = true;
                break;
            }
        }
    }

    if (hasAnswered && !isRedoMode()) {
        logger('子题 ' + (subIndex + 1) + ' 已作答，跳过', 'green');
        setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, 30);
        return;
    }

    // 更新当前题目元信息供日志使用
    let currentTypeName = $subQuestions.parent().parent().attr('typename') || '阅读理解';
    _currentQuestionMeta = { index: _currentQuestionMeta ? _currentQuestionMeta.index : null, total: _currentQuestionMeta ? _currentQuestionMeta.total : null, typeName: currentTypeName + ' 第' + (subIndex + 1) + '小题' };

    if (subType === 0 || subType === 3) {
        let optionTexts = [];
        $options.each(function () {
            optionTexts.push(tidyOptionText($(this).text()));
        });
        let typeStr = subType === 0 ? '单选题' : '判断题';
        let answer_format = subType === 0 ? undefined : '只回答正确或错误';
        let prompt = buildPrompt({ type: typeStr, question: fullQuestion, options: subType === 0 ? optionTexts : undefined, answer_format: answer_format });

        getAnswer(subType, prompt).then(agrs => {
            let _i = -1;
            if (subType === 3) {
                _i = matchJudgeOptionIndex($options, agrs);
            } else {
                let matched = findOptionIndexes($options, agrs, false);
                _i = matched.length > 0 ? matched[0] : -1;
            }

            if (_i === -1) {
                logger('AI未能匹配到正确选项，请手动选择', 'red');
            } else {
                selectChoiceOption($options[_i], false);
                logger('子题 ' + (subIndex + 1) + ' 答题成功', 'green');
            }
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
        }).catch((err) => {
            if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                logger(ne21AnswerStopReason(err), 'red');
                return;
            }
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
        });
    } else if (subType === 1) {
        let optionTexts = [];
        $options.each(function () {
            optionTexts.push(tidyOptionText($(this).text()));
        });
        let prompt = buildPrompt({ type: '多选题', question: fullQuestion, options: optionTexts, answer_format: "用'|'分割多个答案" });

        getAnswer(1, prompt).then(agrs => {
            let matchedIndexes = findOptionIndexes($options, agrs, true);
            if (matchedIndexes.length === 0) {
                logger('AI未能匹配到正确选项，请手动选择', 'red');
            } else {
                matchedIndexes.forEach(idx => {
                    selectChoiceOption($options[idx], true);
                });
                logger('子题 ' + (subIndex + 1) + ' 答题成功', 'green');
            }
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
        }).catch((err) => {
            if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                logger(ne21AnswerStopReason(err), 'red');
                return;
            }
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
        });
    } else if (subType === 2 || subType === 4) {
        let $subTextareas = findAnswerTextareas($subQ);
        if (!$subTextareas || $subTextareas.length === 0) {
            $subTextareas = $subQ.find('textarea, .subEditor textarea, .divText textarea, textarea[name^="answerEditor"]');
        }
        if (!$subTextareas || $subTextareas.length === 0) {
            logger('未找到该小题的填空/文本输入框，跳过', 'red');
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
            return;
        }

        let typeStr = subType === 2 ? '填空题' : '简答题';
        let _blankCount = $subTextareas.length || 1;
        let answer_format = subType === 2
            ? (_blankCount > 1
                ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                : "直接输出该填空的答案，不要包含任何说明")
            : "用50字简要回答";
        let prompt = buildPrompt({ type: typeStr, question: fullQuestion, answer_format: answer_format });

        getAnswer(subType, prompt).then(agrs => {
            let parts = subType === 2 ? splitMultiBlankAnswers(agrs, _blankCount) : [agrs];
            $.each($subTextareas, (i, t) => {
                let val = parts[i] || '';
                setTimeout(() => {
                    fillAnswerTextarea(t, val, $subQ);
                }, 300 + i * 200);
            });
            logger('子题 ' + (subIndex + 1) + ' 答题成功', 'green');
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay + 200 * $subTextareas.length);
        }).catch((err) => {
            if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                logger(ne21AnswerStopReason(err), 'red');
                return;
            }
            setTimeout(() => { processSubQuestions(subIndex + 1, $subQuestions, parentQuestion, getDelay, onComplete) }, delay);
        });
    }
}

// 答题请求超时：必须大于服务端最坏耗时。
// 服务端 LLM 有 HOSTED_TOTAL_BUDGET_MS(默认 75s) 总时限；若客户端超时更短，请求会在
// 服务端仍在处理时被判定超时，而 GM_xmlhttpRequest 缺省没有 ontimeout 时会把超时
// 路由到 onerror，表现为误导性的"无法连接到云端答题服务"。
var _ANSWER_REQUEST_TIMEOUT_MS = 110000;
// 网络类失败（连不上/超时/网关错误）的重试次数。
// 重试是安全的：服务端有答案缓存，最坏情况是首次已在服务端完成并扣点，重试直接命中缓存免费返回。
var _ANSWER_NETWORK_RETRIES = 1;
var _ANSWER_RETRY_DELAY_MS = 3000;

// ==========================================
// 答题失败后的处置策略
// getAnswer 只会以 401 / 402 / HTTP 状态码 / 'TIMEOUT' / 'NETWORK' 拒绝，
// 历史上从不存在 c:0。而旧 catch 一律写作 `agrs['c'] == 0`，是永假条件：
// 一旦失败，答题链既不前进也不停止，整轮自动化静默停死在那道题上。
// 这里按错误类型分流：
//   - 401 / 402（未登录、积分不足）是终态，继续跑只会把剩余题目全部试错，
//     应停止并提示用户充值；
//   - 网络类、超时、5xx 是可恢复的瞬时故障，跳过本题继续跑，
//     避免一次抖动就毁掉整轮无人值守任务。
// ==========================================
function ne21AnswerErrorShouldStop(err) {
    if (!err || typeof err !== 'object') return false;
    var c = err.c;
    return c === 401 || c === 402;
}

function ne21AnswerStopReason(err) {
    var c = (err && typeof err === 'object') ? err.c : undefined;
    if (c === 401) return '未检测到学习通 UID，请登录超星账号后刷新页面';
    if (c === 402) return '账号积分不足，请在充值中心充值或开通月卡';
    return '答题服务返回异常';
}

function getAnswer(_t, _q, retryCount = 0) {
    let _payload, _display, _images = [], _options = [];
    if (_q && typeof _q === 'object' && (_q.payload != null || _q.display != null)) {
        _payload = _q.payload != null ? String(_q.payload) : '';
        _display = _q.display != null ? String(_q.display) : _payload;
        if (Array.isArray(_q.images)) _images = _q.images;
        if (Array.isArray(_q.options)) _options = _q.options;
    } else {
        _payload = _q == null ? '' : String(_q);
        _display = _payload;
    }
    let _qPrefix = '';
    if (_currentQuestionMeta) {
        var _m = _currentQuestionMeta;
        _qPrefix = '第' + ((_m.index != null ? _m.index : -1) + 1);
        if (_m.total) _qPrefix += '/' + _m.total;
        _qPrefix += '题 [' + (_m.typeName || '未知') + '] ';
    }

    // 1. 本地离线题库秒答检查（开启且非重试状态）
    var cacheEnabled = localStorage.getItem('GPTJsSetting.localCache') !== 'false';
    if (cacheEnabled && retryCount === 0) {
        var cachedAnswer = localAnswerCache.get(_payload);
        if (cachedAnswer) {
            logger(_qPrefix + '题目:' + _display, 'pink');
            if (typeof isThinkingPauseEnabled === 'function' && isThinkingPauseEnabled()) {
                var pauseMs = calcThinkingPauseDelay(_payload.length);
                var $thinking = logger('<span class="ne21-log-spinner"></span>📖 拟人化阅读题干中（预计 ' + (pauseMs / 1000).toFixed(1) + 's，微动作仿真）...', 'gray', { raw: true });
                if (typeof ne21SimulateThinkingMicroActions === 'function') {
                    ne21SimulateThinkingMicroActions(pauseMs);
                }
                return new Promise(function (resolve) {
                    setTimeout(function () {
                        updateLogEntry($thinking, '⚡ 审题完成，命中本地答案缓存 (免积分): ' + cachedAnswer, 'green');
                        resolve(cachedAnswer);
                    }, pauseMs);
                });
            } else {
                logger('⚡ 命中本地答案缓存，极速秒答 (免积分): ' + cachedAnswer, 'green');
                return Promise.resolve(cachedAnswer);
            }
        }
    }

    logger(_qPrefix + '题目:' + _display, 'pink');
    if (_images && _images.length > 0) {
        logger('🖼️ 题目已附带 ' + _images.length + ' 张图表/公式，将通过多模态视觉通道分析', 'blue');
    }
    let _thinkingHtml = '<span class="ne21-log-spinner"></span>AI 思考中<span class="ne21-log-dots"><i></i><i></i><i></i></span>' + (retryCount > 0 ? '（第' + (retryCount + 1) + '次）' : '');
    let $thinkingLog = logger(_thinkingHtml, 'gray', { raw: true });

    return new Promise((resolve, reject) => {
        var studentUid = getStudentUid();
        var sUrl = getSafeServerUrl();

        if (!studentUid) {
            updateLogEntry($thinkingLog, '❌ 未检测到学习通 UID，请登录超星账号后刷新页面', 'red');
            localStorage.setItem('GPTJsSetting.sub', false);
            reject({ 'c': 401 });
            return;
        }

        function attempt(attemptNo) {
            // 拟人化延时节流（每次尝试都重新计算，避免重试瞬间连发打满上游）
            let _rawInterval = setting.time !== undefined ? setting.time : 2500;
            // 云控下发的拟人延时基准同样要参与计算。此前 jitterBaseMs 只在
            // policy.js 里定义、由 /api/config/policy 下发，客户端从来没读过，
            // 属于一个完全失效的运营旋钮。
            try {
                if (_cloudPolicy && _cloudPolicy.jitterBaseMs) _rawInterval = Number(_cloudPolicy.jitterBaseMs) || _rawInterval;
            } catch { /* 策略未就绪时沿用本地设置 */ }
            let _isHumanJitter = localStorage.getItem('GPTJsSetting.humanJitter') !== 'false';
            let _intervalMs = Math.min(60000, _isHumanJitter ? getHumanJitterDelay(_rawInterval) : _rawInterval);

            // 若开启拟人化思考停顿，且为首次请求，根据题干字数动态计算阅读与审题时长
            if (typeof isThinkingPauseEnabled === 'function' && isThinkingPauseEnabled() && attemptNo === 0) {
                let _thinkingDelayMs = calcThinkingPauseDelay(_payload.length);
                _intervalMs = Math.max(_intervalMs, _thinkingDelayMs);
            }

            let _nowTs = Date.now();
            let _waitMs = Math.max(0, _ne21NextAiAllowedAt - _nowTs);
            _ne21NextAiAllowedAt = Math.max(_nowTs, _ne21NextAiAllowedAt) + _intervalMs;
            if (_waitMs > 0) {
                if (typeof isThinkingPauseEnabled === 'function' && isThinkingPauseEnabled() && attemptNo === 0) {
                    updateLogEntry($thinkingLog, '📖 模拟学生阅读题干与思考中（预计 ' + Math.round(_waitMs / 1000) + 's，微动作仿真）...', 'gray');
                    if (typeof ne21SimulateThinkingMicroActions === 'function') {
                        ne21SimulateThinkingMicroActions(_waitMs);
                    }
                } else {
                    updateLogEntry($thinkingLog, '答题间隔保护，等待 ' + Math.round(_waitMs / 1000) + 's 后请求云端解答...', 'gray');
                }
            }

            setTimeout(function () {
                GM_xmlhttpRequest({
                    method: 'POST',
                    url: sUrl + '/api/answer/solve',
                    headers: ne21AuthHeaders({ 'Content-Type': 'application/json' }),
                    data: JSON.stringify({
                        uid: studentUid,
                        type: _t,
                        question: _payload,
                        options: _options,
                        images: _images
                    }),
                    timeout: _ANSWER_REQUEST_TIMEOUT_MS,
                onload: function (xhr) {
                    if (xhr.status === 200) {
                        try {
                            var res = JSON.parse(xhr.responseText);
                            if (res.code === 200) {
                                var answer = res.rawAnswer || res.answer || res.display;
                                var cost = res.cost !== undefined ? res.cost : 1;
                                var qMsg = res.isMonthCard ? '已享月卡特权免扣点' : ('扣除 ' + cost + ' 积分，剩余 ' + res.pointsLeft + ' 积分');
                                var displayAns = res.display;
                                if (!displayAns || displayAns === '选项 []' || displayAns === '选项[]') {
                                    displayAns = res.rawAnswer || res.answer || answer || '已作答';
                                }
                                var divergenceTag = (res.divergence && res.divergence.architecture) ? (' [' + res.divergence.architecture + ' · ' + res.divergence.perspective + ']') : '';
                                updateLogEntry($thinkingLog, '⚡ AI 解答成功 (' + qMsg + ')' + divergenceTag + ': ' + displayAns, 'green');

                                // 实时自动同步浮窗卡片上的剩余额度，无需手动点击刷新按钮
                                try {
                                    var $box = $('#ne-21box');
                                    if (!$box.length && window.top) {
                                        try { $box = $('#ne-21box', window.top.document); } catch { /* 忽略 */ }
                                    }
                                    if ($box.length && res.pointsLeft !== undefined) {
                                        if (res.isMonthCard) {
                                            $box.find('#ne21PointsVal').html(res.pointsLeft + ' 点 <b style="color:#10b981;font-size:11px;">(月卡生效)</b>');
                                            $box.find('#ne21VipBadge').text('尊贵月卡').css({ background: '#dcfce7', color: '#15803d' });
                                            $box.find('#ne21StatusDot').css({ background: '#10b981' });
                                        } else {
                                            $box.find('#ne21PointsVal').html(res.pointsLeft + ' 积分');
                                            $box.find('#ne21VipBadge').text('标准会员').css({ background: '#e0f2fe', color: '#0369a1' });
                                            $box.find('#ne21StatusDot').css({ background: '#10b981' });
                                        }
                                    }
                                } catch { /* 忽略 */ }

                                if (cacheEnabled) localAnswerCache.set(_payload, answer);
                                resolve(answer);
                                return;
                            }
                        } catch { /* 忽略 */ }
                    } else if (xhr.status === 402) {
                        updateLogEntry($thinkingLog, '❌ 当前账号可用积分不足！请点击面板【充值/续费月卡】购买额度', 'red');
                        localStorage.setItem('GPTJsSetting.sub', false);
                        reject({ 'c': 402 });
                        return;
                    }
                    // 网关类错误可重试；4xx 是明确业务拒绝，重试无意义
                    var _retryableStatus = (xhr.status >= 500 || xhr.status === 408 || xhr.status === 429);
                    if (_retryableStatus && attemptNo < _ANSWER_NETWORK_RETRIES) {
                        // 真正执行重试（此前只在文案里承诺"自动重试"却直接 reject 跳题），
                        // 与 ontimeout/onerror 共用同一重试计数与间隔。
                        updateLogEntry($thinkingLog, '⚠️ 云端解答繁忙 (HTTP ' + xhr.status + ')，' + Math.round(_ANSWER_RETRY_DELAY_MS / 1000) + 's 后重试...', 'orange');
                        setTimeout(function () { attempt(attemptNo + 1); }, _ANSWER_RETRY_DELAY_MS);
                        return;
                    }
                    updateLogEntry($thinkingLog, '❌ 云端解答异常 (HTTP ' + xhr.status + ')' + (_retryableStatus ? '，请稍后重试' : ''), 'red');
                    reject({ 'c': xhr.status, retryable: _retryableStatus });
                },
                // 明确区分"超时"与"连不上"：根因完全不同。
                // 超时基本是上游 AI 慢，连不上才是服务不可达/被浏览器拦截。
                ontimeout: function () {
                    if (attemptNo < _ANSWER_NETWORK_RETRIES) {
                        updateLogEntry($thinkingLog, '⏱️ 云端解答超时（上游 AI 响应过慢），' + Math.round(_ANSWER_RETRY_DELAY_MS / 1000) + 's 后重试...', 'orange');
                        setTimeout(function () { attempt(attemptNo + 1); }, _ANSWER_RETRY_DELAY_MS);
                        return;
                    }
                    updateLogEntry($thinkingLog, '⏱️ 云端解答超时：上游 AI 长时间未响应，请稍后重试或降低答题频率', 'red');
                    reject({ 'c': 'TIMEOUT' });
                },
                onerror: function () {
                    if (attemptNo < _ANSWER_NETWORK_RETRIES) {
                        updateLogEntry($thinkingLog, '🔌 无法连接云端答题服务，' + Math.round(_ANSWER_RETRY_DELAY_MS / 1000) + 's 后重试...', 'orange');
                        setTimeout(function () { attempt(attemptNo + 1); }, _ANSWER_RETRY_DELAY_MS);
                        return;
                    }
                    updateLogEntry($thinkingLog, '❌ 无法连接到云端答题服务：请检查网络，或确认服务域名可访问', 'red');
                    reject({ 'c': 'NETWORK' });
                }
                });
            }, _waitMs);
        }

        attempt(0);
    });
}

function doWork(index, doms, dom) {
    $frame_c = $(dom).contents();
    let $CyHtml = $frame_c.find('.CeYan')
    let TiMuList = $CyHtml.find('.TiMu')
    $subBtn = $frame_c.find(".ZY_sub").find(".btnSubmit");
    $saveBtn = $frame_c.find(".ZY_sub").find(".btnSave");
    var willSubmit = localStorage.getItem('GPTJsSetting.sub') === 'true' || localStorage.getItem('GPTJsSetting.force') === 'true';
    logger('准备处理测验，共 ' + TiMuList.length + ' 题；当前策略：【' + (willSubmit ? '自动提交' : '暂时保存') + '】', 'purple');
    startDoWork(index, doms, 0, TiMuList)
}

function startDoWork(index, doms, c, TiMuList) {
    if (localStorage.getItem('GPTJsSetting.isPaused') === 'true') {
        setTimeout(() => { startDoWork(index, doms, c, TiMuList) }, 3000);
        return;
    }
    if (c == TiMuList.length) {
        if (localStorage.getItem('GPTJsSetting.sub') === 'true' || localStorage.getItem('GPTJsSetting.force') === 'true') {
            if (typeof isThinkingPauseEnabled === 'function' && isThinkingPauseEnabled()) {
                logger('测验作答完毕，拟人化通篇复查与鼠标微动（防极速提交风控）...', 'blue');
                if (typeof ne21SimulateThinkingMicroActions === 'function') {
                    ne21SimulateThinkingMicroActions(3000);
                }
            }
            logger('测验处理完成，准备自动提交。', 'green');
            setTimeout(() => {
                var $targetSub = (typeof resolveQuizSubmitBtn === 'function') ? resolveQuizSubmitBtn($frame_c) : $subBtn;
                var submitted = false;
                if ($targetSub && $targetSub.length) {
                    logger('找到测验提交按钮，正在执行提交...', 'green');
                    submitted = (typeof triggerQuizButtonClick === 'function') ? triggerQuizButtonClick($targetSub) : $targetSub.click();
                } else if ($subBtn && $subBtn.length) {
                    logger('使用默认选择器提交测验...', 'green');
                    submitted = (typeof triggerQuizButtonClick === 'function') ? triggerQuizButtonClick($subBtn) : $subBtn.click();
                } else if (typeof trySubmitQuizFormDirectly === 'function') {
                    submitted = trySubmitQuizFormDirectly($frame_c);
                    if (submitted) {
                        logger('已通过原生提交函数触发提交。', 'green');
                    } else {
                        logger('⚠️ 未找到测验提交按钮，请手动点击提交。', 'orange');
                    }
                } else {
                    logger('⚠️ 未找到测验提交按钮，请手动点击提交。', 'orange');
                }

                var confirmAttempts = 0;
                var confirmTimer = setInterval(function () {
                    confirmAttempts++;
                    var confirmed = false;
                    if (typeof autoConfirmQuizSubmission === 'function') {
                        confirmed = autoConfirmQuizSubmission($frame_c);
                    } else if ($frame_c && $frame_c.find('#confirmSubWin a.bluebtn').length) {
                        $frame_c.find('#confirmSubWin a.bluebtn').click();
                        confirmed = true;
                    }
                    if (confirmed || confirmAttempts >= 8) {
                        clearInterval(confirmTimer);
                        logger('提交确认流程结束，准备切换下一个任务。', 'green');
                        _mlist.splice(0, 1);
                        _domList.splice(0, 1);
                        setTimeout(() => { startDoCyWork(index + 1, doms); }, 3000);
                    }
                }, 500);
            }, 3000);
        } else {
            logger('测验处理完成，用户设置不提交，自动暂时保存！', 'green');
            setTimeout(() => {
                var $targetSave = (typeof resolveQuizSaveBtn === 'function') ? resolveQuizSaveBtn($frame_c) : $saveBtn;
                if ($targetSave && $targetSave.length) {
                    logger('找到测验保存按钮，正在执行保存...', 'green');
                    if (typeof triggerQuizButtonClick === 'function') {
                        triggerQuizButtonClick($targetSave);
                    } else {
                        $targetSave.click();
                    }
                } else if ($saveBtn && $saveBtn.length) {
                    logger('使用默认选择器暂时保存测验...', 'green');
                    $saveBtn.click();
                } else {
                    logger('⚠️ 未找到测验保存按钮，请手动点击暂时保存。', 'orange');
                }
                logger('暂时保存完成，准备切换下一个任务。', 'green');
                _mlist.splice(0, 1);
                _domList.splice(0, 1);
                setTimeout(() => { startDoCyWork(index + 1, doms); }, 3000);
            }, 3000);
        }
        return;
    }
    let $titleNode = $(TiMuList[c]).find('.Zy_TItle.clearfix > div, .Zy_TItle, .mark_name, h3, .stem_title, .Py-m1-title');
    let questionFull = $titleNode.length ? $titleNode.html() : ($(TiMuList[c]).find('.Zy_TItle.clearfix > div').html() || '');
    let _questionClean = tidyQuestion(questionFull.replace(/<span.*?>.*?<\/span>/g, ''));
    let _TimuType = resolveQuestionType($(TiMuList[c]), _questionClean);
    let typeName = '';
    let typeNameMatch = _questionClean.match(/[(（[【]\s*([^)）\]】]+?)[)）\]】]/);
    if (typeNameMatch && typeNameMatch[1]) {
        typeName = typeNameMatch[1].split(/[,，、\s]/)[0];
    }
    if (!typeName) {
        typeName = ['单选题', '多选题', '填空题', '判断题', '简答题', '写作题', '翻译题'][_TimuType] || '未知题型';
    }
    _currentQuestionMeta = { index: c, total: TiMuList.length, typeName: typeName }; _currentQuestionDom = $(TiMuList[c]);
    let _question = _questionClean
        .replace(/^\s*\d+[.、\s]*/, '')
        .replace(/^[(（[【].*?[)）\]】]/, '')
        .trim();
    let _answerTmpArr;

    switch (_TimuType) {
        case 0: {
            _answerTmpArr = $(TiMuList[c]).find('.Zy_ulTop li').find('a')
            //遍历选项列表
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '单选题', question: _question, options: mergedAnswers.split('|') })
            getAnswer(_TimuType, _question).then((agrs) => {
                let matched = findOptionIndexes(_answerTmpArr, agrs, false)
                if (matched.length === 0) {
                    let _a = [];
                    $.each(_answerTmpArr, (i, t) => {
                        _a.push(tidyStr($(t).html()));
                    });
                    let _i = _a.findIndex((item) => item == agrs);
                    if (_i === -1) {
                        _i = findBestFuzzyMatch(_a, agrs);
                    }
                    if (_i !== -1) {
                        matched = [_i];
                    }
                }
                if (matched.length === 0) {
                    logger('AI无法完美匹配正确答案,请手动选择，跳过', 'red')
                    localStorage.setItem('GPTJsSetting.sub', false)
                } else {
                    selectChoiceOption(_answerTmpArr[matched[0]], false)
                }
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time)
            }).catch((err) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                    logger(ne21AnswerStopReason(err), 'red');
                    return;
                }
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time)
            })
            break
        }
        case 1: {
            _answerTmpArr = $(TiMuList[c]).find('.Zy_ulTop li').find('a')
            //遍历选项列表
            let mergedAnswers = [];
            _answerTmpArr.each(function () {
                var answerText = tidyOptionText($(this).text());
                mergedAnswers.push(answerText);
            });
            mergedAnswers = mergedAnswers.join("|");
            _question = buildPrompt({ type: '多选题', question: _question, options: mergedAnswers.split('|'), answer_format: "用'|'分割多个答案" })
            getAnswer(_TimuType, _question).then((agrs) => {
                let matched = findOptionIndexes(_answerTmpArr, agrs, true)
                if (matched.length === 0) {
                    let _multiOptions = [];
                    $.each(_answerTmpArr, (i, t) => {
                        _multiOptions.push(tidyStr($(t).html()));
                    });
                    let fallbackIdxs = [];
                    $.each(_answerTmpArr, (i) => {
                        if (agrs.indexOf(_multiOptions[i]) != -1) {
                            fallbackIdxs.push(i);
                        }
                    });
                    if (fallbackIdxs.length === 0) {
                        fallbackIdxs = findFuzzyMatchMultiple(_multiOptions, agrs);
                    }
                    if (fallbackIdxs.length > 0) {
                        matched = fallbackIdxs;
                    }
                }
                if (matched.length === 0) {
                    logger('AI无法完美匹配正确答案,请手动选择，跳过', 'red')
                    localStorage.setItem('GPTJsSetting.sub', false)
                } else {
                    let letterList = ['A', 'B', 'C', 'D', 'E', 'F', 'G']
                    let selectedLetters = []
                    matched.forEach(idx => {
                        selectChoiceOption(_answerTmpArr[idx], true)
                        if (letterList[idx]) selectedLetters.push(letterList[idx])
                    })
                    try {
                        let onclickAttr = $(TiMuList[c]).find('.Zy_ulTop li:nth-child(1)').attr('onclick') || ''
                        let id = getStr(onclickAttr, 'addcheck(', ');').replace('(', '').replace(')', '')
                        if (id) {
                            $(TiMuList[c]).find('.Zy_ulTop').parent().find('#answer' + id).val(selectedLetters.join(""))
                        }
                    } catch { /* 忽略 */ }
                }
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time)
            }).catch((err) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                    logger(ne21AnswerStopReason(err), 'red');
                    return;
                }
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time)
            })
            break
        }
        case 2: {
            let _textareaList = findAnswerTextareas($(TiMuList[c]));
            if (!_textareaList || _textareaList.length === 0) {
                _textareaList = findFillBlankInputs($(TiMuList[c]));
            }
            if (!_textareaList || _textareaList.length === 0) {
                logger('未找到填空题输入区域，跳过此题', 'red');
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time);
                break;
            }
            let _blankCount = _textareaList.length || 1;
            let formatDesc = _blankCount > 1
                ? "本题共有" + _blankCount + "个填空。必须严格按顺序仅输出这" + _blankCount + "个空的答案，答案之间必须且只能用竖线'|'分隔（如 答案1|答案2），严禁包含空编号或多余说明"
                : "直接输出该填空的答案，不要包含任何说明";
            _question = buildPrompt({ type: '填空题', question: _question, answer_format: formatDesc });
            getAnswer(_TimuType, _question).then((agrs) => {
                let _answerList = splitMultiBlankAnswers(agrs, _blankCount);
                $.each(_textareaList, (i, t) => {
                    let answerVal = _answerList[i] || '';
                    setTimeout(() => {
                        fillAnswerTextarea(t, answerVal, $(TiMuList[c]));
                    }, 300 + i * 200);
                });
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time + 200 * _blankCount);
            }).catch((err) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                    logger(ne21AnswerStopReason(err), 'red');
                    return;
                }
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time);
            });
            break;
        }
        case 3: {
            _answerTmpArr = $(TiMuList[c]).find(".Zy_ulTop li").find("a");
            _question = buildPrompt({ type: '判断题', question: _question, answer_format: "只回答正确或错误" })
            getAnswer(_TimuType, _question).then((agrs) => {
                let _i = matchJudgeOptionIndex(_answerTmpArr, agrs);
                if (_i === -1) {
                    let judgeResult = parseJudgeAnswer(agrs);
                    if (judgeResult !== null) {
                        let _a = [];
                        $.each(_answerTmpArr, (i, t) => {
                            _a.push($(t).text().trim());
                        });
                        _i = findJudgeOptionIndex(_a, judgeResult === 'true');
                    }
                    if (_i !== -1) {
                        _i = applyJudgeTargetAccuracyControl(_i, _answerTmpArr.length);
                    }
                }
                if (_i === -1) {
                    logger("未匹配到正确答案，跳过", "red");
                    localStorage.setItem('GPTJsSetting.sub', false)
                } else {
                    selectChoiceOption(_answerTmpArr[_i], false)
                }
                setTimeout(() => {
                    startDoWork(index, doms, c + 1, TiMuList);
                }, setting.time);
            }).catch((err) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                    logger(ne21AnswerStopReason(err), 'red');
                    return;
                }
                setTimeout(() => {
                    startDoWork(index, doms, c + 1, TiMuList);
                }, setting.time);
            });
            break;
        }
        case 4:
        case 5:
        case 6: {
            let _textareaLista = findAnswerTextareas($(TiMuList[c]));
            if (!_textareaLista || _textareaLista.length === 0) {
                _textareaLista = findFillBlankInputs($(TiMuList[c]));
            }
            if (!_textareaLista || _textareaLista.length === 0) {
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time);
                break;
            }
            let typePromptName = typeName || (_TimuType === 5 ? '写作题' : (_TimuType === 6 ? '翻译题' : '简答题'));
            let formatStr = _TimuType === 5 ? "用英文根据题目进行写作" : (_TimuType === 6 ? "中文英文互译" : "用50字简要回答");
            let prompt = buildPrompt({ type: typePromptName, question: _question, answer_format: formatStr });
            getAnswer(_TimuType, prompt).then((agrs) => {
                if (agrs == '暂无答案') {
                    localStorage.setItem('GPTJsSetting.sub', false);
                }
                $.each(_textareaLista, (i, t) => {
                    setTimeout(() => {
                        fillAnswerTextarea(t, agrs, $(TiMuList[c]));
                    }, 300 + i * 200);
                });
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time + 200 * _textareaLista.length);
            }).catch((err) => {
                if (typeof ne21AnswerErrorShouldStop === 'function' && ne21AnswerErrorShouldStop(err)) {
                    logger(ne21AnswerStopReason(err), 'red');
                    return;
                }
                setTimeout(() => { startDoWork(index, doms, c + 1, TiMuList) }, setting.time);
            });
            break;
        }
    }
}

// 任务队列前移的唯一入口：_mlist / _domList 的 splice 只允许在这里发生。
// 调用方（各 mission）不得先行 splice，否则会一次前进两步、静默跳过任务点——
// startDoPhoneTimu 曾经就是这样漏掉测验的。
function switchMission() {
    _mlist.splice(0, 1)
    _domList.splice(0, 1)
    setTimeout(missonStart, 2500)
}

function tidyStr(s) {
    if (s) {
        let str = s.replace(/<(?!img).*?>/g, "").replace(/^【.*?】\s*/, '').replace(/\s*（\d+\.\d+分）$/, '').trim().replace(/&nbsp;/g, '').replace(new RegExp("&nbsp;", ("gm")), '').replace(/^\s+/, '').replace(/\s+$/, '');
        return str
    } else {
        return null
    }
}

function tidyQuestion(s) {
    if (s) {
        let str = s.replace(/<(?!img).*?>/g, "").replace(/^【.*?】\s*/, '').replace(/\s*（\d+\.\d+分）$/, '').replace(/^\d+[.、]/, '').trim().replace(/&nbsp;/g, '').replace('javascript:void(0);', '').replace(new RegExp("&nbsp;", ("gm")), '').replace(/^\s+/, '').replace(/\s+$/, '');
        return str
    } else {
        return null
    }
}


// 异步依次尝试各字典源，返回第一个内容合法的字典。
// 历史实现使用 GM_xmlhttpRequest({ synchronous: true }) 在主线程上同步阻塞最多 6 秒：
//   - synchronous 已被各脚本管理器标记为废弃能力，脚本猫/新版油猴可能直接不支持，
//     结果是"解密静默失效、题干乱码但不报错"（最难排查的一类故障）；
//   - 即使支持，也会在页面加载关键期阻塞主线程。
// 现改为纯异步 + 串行回退，行为等价且不再依赖废弃 API。
function fetchFontTable(urls) {
    return new Promise(function (resolve) {
        var i = 0;
        function next() {
            if (i >= urls.length) return resolve(null);
            var url = urls[i++];
            var settled = false;
            function done(table) {
                if (settled) return;
                settled = true;
                if (table) resolve(table); else next();
            }
            try {
                GM_xmlhttpRequest({
                    method: 'GET',
                    url: url,
                    timeout: 8000,
                    onload: function (res) {
                        if (res && res.status === 200 && res.responseText) {
                            try {
                                var t = JSON.parse(res.responseText);
                                if (t && Object.keys(t).length > 1000) return done(t);
                            } catch { /* 非 JSON 或内容异常，尝试下一个源 */ }
                        }
                        done(null);
                    },
                    onerror: function () { done(null); },
                    ontimeout: function () { done(null); }
                });
            } catch {
                done(null);
            }
        }
        next();
    });
}

function decryptFont() {
    /**
    * Author   wyn665817
    * From     https://greasyfork.org/zh-CN/scripts/445007
    */
    try {
        var $tip = $('style:contains(font-cxsecret)');
        if (!$tip.length) return;
        // 依赖已本地内联进本脚本，正常不会再出现"未就绪"；保留提示便于定位构建问题。
        if (typeof Typr === 'undefined' || typeof md5 === 'undefined') {
            logger('⚠️ 字体反混淆依赖未就绪（Typr/md5），请重新安装脚本', 'red');
            return;
        }
        var fontMatch = $tip.text().match(/base64,([\w\W]+?)'/);
        if (!fontMatch || !fontMatch[1]) return;
        var font = Typr.parse(base64ToUint8Array(fontMatch[1]))[0];
        if (!font) return;

        // 字体映射字典兜底顺序：@resource（不占网络）→ 自有服务 → 第三方保底源。
        // 字典一旦失效，题干会显示成乱码却不报错（答案全错），因此这里必须显式告警。
        var table = null;
        try { table = JSON.parse(GM_getResourceText('Table')); } catch { /* empty */ }

        var applyTable = function (t) {
            if (!t) {
                logger('⚠️ 字体映射字典获取失败，题干可能出现乱码，答案准确率会受影响', 'orange');
                return;
            }
            try {
                var match = {};
                for (var i = 19968; i < 40870; i++) {
                    var glyph = Typr.U.codeToGlyph(font, i);
                    if (!glyph) continue;
                    glyph = Typr.U.glyphToPath(font, glyph);
                    var h = md5(JSON.stringify(glyph)).slice(24);
                    if (t[h]) match[i] = t[h];
                }
                $('.font-cxsecret').html(function (index, html) {
                    $.each(match, function (key, value) {
                        key = String.fromCharCode(key);
                        key = new RegExp(key, 'g');
                        value = String.fromCharCode(value);
                        html = html.replace(key, value);
                    });
                    return html;
                }).removeClass('font-cxsecret');
            } catch (err) {
                console.error('[GPTJs] 字体解密异常:', err);
            }
        };

        if (table) {
            applyTable(table);
            return;
        }
        fetchFontTable([
            getSafeServerUrl() + '/font/table.json',
            'https://www.forestpolice.org/ttf/2.0/table.json'
        ]).then(applyTable).catch(function (err) {
            console.error('[GPTJs] 字体映射字典获取异常:', err);
        });
    } catch (err) {
        console.error('[GPTJs] 字体解密异常:', err);
    }
}

function base64ToUint8Array(base64) {
    var data = window.atob(base64);
    var buffer = new Uint8Array(data.length);
    for (var i = 0; i < data.length; ++i) {
        buffer[i] = data.charCodeAt(i);
    }
    return buffer;
}