// ==UserScript==
// @name         🏅学习通AI研习助手|💡智能刷课+自动答题|🤖 AI智能答题|🏆 一键启动|🛠️ 无需配置|长期维护更新
// @namespace    http://tampermonkey.net/
// @version      1.1.7
// @description  采用AI大模型，题目识别准、作答快，所有题目均可作答。支持自动刷课、自动答题、自动完成章节测试，简洁界面、稳定服务，持续适配平台更新。
// @author       kail
// @match        *://*.chaoxing.com/*
// @grant        GM_xmlhttpRequest
// @grant        GM_addStyle
// @grant        GM_getResourceText
// @connect      api.116611.xyz
// @resource     typrMd5Lib https://116611.xyz/typr-md5.js
// @resource     fontTableData https://116611.xyz/table.json
// @license CC-BY-NC-ND-4.0
// @antifeature  payment  脚本存在第三方答题接口付费功能
// @icon          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
// ==/UserScript==




     const systemConfig = {
        buildTime: new Date().toISOString(),
        environment: 'production'
    };
    class Logger {
        constructor(prefix) {
            this.prefix = prefix || 'System';
            this.levels = ['DEBUG', 'INFO', 'WARN', 'ERROR'];
        }

        log(level, message) {
            if (this.levels.includes(level)) {
                const timestamp = new Date().toISOString();
            }
        }

        debug(msg) { this.log('DEBUG', msg); }
        info(msg) { this.log('INFO', msg); }
        warn(msg) { this.log('WARN', msg); }
        error(msg) { this.log('ERROR', msg); }
    }


    const logger = new Logger('CXHelper');

    const browserCheck = {
        isChrome: () => /Chrome/.test(navigator.userAgent),
        isFirefox: () => /Firefox/.test(navigator.userAgent),
        isEdge: () => /Edge/.test(navigator.userAgent),
        isSafari: () => /Safari/.test(navigator.userAgent) && !/Chrome/.test(navigator.userAgent)
    };


    class PerformanceMonitor {
        constructor() {
            this.metrics = new Map();
            this.startTimes = new Map();
        }

        start(name) {
            this.startTimes.set(name, performance.now());
        }

        end(name) {
            const startTime = this.startTimes.get(name);
            if (startTime) {
                const duration = performance.now() - startTime;
                this.metrics.set(name, duration);
                this.startTimes.delete(name);
                return duration;
            }
            return 0;
        }

        getMetric(name) {
            return this.metrics.get(name) || 0;
        }
    }


    const perfMonitor = new PerformanceMonitor();


    const utils = {

        generateId: (length = 8) => {
            const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
            let result = '';
            for (let i = 0; i < length; i++) {
                result += chars.charAt(Math.floor(Math.random() * chars.length));
            }
            return result;
        },


        deepClone: (obj) => {
            if (obj === null || typeof obj !== 'object') return obj;
            if (obj instanceof Date) return new Date(obj.getTime());
            if (obj instanceof Array) return obj.map(item => utils.deepClone(item));
            if (typeof obj === 'object') {
                const cloned = {};
                Object.keys(obj).forEach(key => {
                    cloned[key] = utils.deepClone(obj[key]);
                });
                return cloned;
            }
        },


        debounce: (func, wait) => {
            let timeout;
            return function executedFunction(...args) {
                const later = () => {
                    clearTimeout(timeout);
                    func(...args);
                };
                clearTimeout(timeout);
                timeout = setTimeout(later, wait);
            };
        },


        throttle: (func, limit) => {
            let inThrottle;
            return function() {
                const args = arguments;
                const context = this;
                if (!inThrottle) {
                    func.apply(context, args);
                    inThrottle = true;
                    setTimeout(() => inThrottle = false, limit);
                }
            }
        }
    };

    class CacheManager {
        constructor(maxSize = 100) {
            this.cache = new Map();
            this.maxSize = maxSize;
        }

        set(key, value, ttl = 300000) { // 默认5分钟过期
            if (this.cache.size >= this.maxSize) {
                const firstKey = this.cache.keys().next().value;
                this.cache.delete(firstKey);
            }

            const item = {
                value: value,
                expiry: Date.now() + ttl
            };
            this.cache.set(key, item);
        }

        get(key) {
            const item = this.cache.get(key);
            if (!item) return null;

            if (Date.now() > item.expiry) {
                this.cache.delete(key);
                return null;
            }

            return item.value;
        }

        clear() {
            this.cache.clear();
        }
    }

    const cacheManager = new CacheManager();


    logger.info('System initialization completed');

(function() {
    'use strict';


(function(){
    function _b64ToBytes(b64){ const bin = atob(b64); const out = new Uint8Array(bin.length); for(let i=0;i<bin.length;i++) out[i] = bin.charCodeAt(i); return out; }
    function _bytesToStr(arr){ let s=''; for(let i=0;i<arr.length;i++) s += String.fromCharCode(arr[i]); return s; }
    function _strToBytes(s){ const out = new Uint8Array(s.length); for(let i=0;i<s.length;i++) out[i] = s.charCodeAt(i); return out; }
    function _xor(a,b){ const out=new Uint8Array(a.length); for(let i=0;i<a.length;i++) out[i] = a[i] ^ b[i % b.length]; return out; }
    const __S = [100, 121, 96, 105, 102, 109, 113, 102, 115, 96, 116, 98, 109, 117, 96, 51, 49, 51, 54].map(c=>c-1);
    const __SALT = String.fromCharCode.apply(null, __S);
    const __ENC = "idiM9YBNCEBSu80fAcWJtglB3UgCOQSNSUCG2EFbmlWW7AyIJkSb/kgNWgCHsoEA";
    function __getDSK(){
        try {
            const step1 = __ENC.split('').reverse().join('');
            const xored = _b64ToBytes(step1);
            const plainB64Bytes = _xor(xored, _strToBytes(__SALT));
            const plainB64 = _bytesToStr(plainB64Bytes);
            return atob(plainB64);
        } catch (e) { return ''; }
    }
    window.__getDeepseekKey = __getDSK;
})();


const DEEPSEEK_PROXY_BASE = 'https://api.116611.xyz';

const DEEPSEEK_MODEL = 'deepseek-chat';
const DEEPSEEK_API_URL = `${DEEPSEEK_PROXY_BASE}/v1/chat/completions`;

function deepseekChat(messages, options = {}) {
    return new Promise((resolve, reject) => {
        try {
            GM_xmlhttpRequest({
                method: 'POST',
                url: DEEPSEEK_API_URL,
                headers: {
                    'Content-Type': 'application/json',
                    'X-App-Token': __getDSAuth()
                },
                data: JSON.stringify({ model: DEEPSEEK_MODEL, messages, ...options }),
                timeout: 60000,
                onload: (r) => {
                    if (r.status >= 200 && r.status < 300) {
                        try { resolve(JSON.parse(r.responseText)); } catch (e) { reject(e); }
                    } else {
                        reject(new Error(`HTTP ${r.status}: ${String(r.responseText || '').slice(0,200)}`));
                    }
                },
                onerror: () => reject(new Error('Network error')),
                ontimeout: () => reject(new Error('Timeout'))
            });
        } catch (err) {
            reject(err);
        }
    });
}
    let isAnswering = false;
    let isStudyingChapters = false;
    let studyIntervalId = null;
    const STUDY_PERSIST_KEY = 'cx_helper_study_on_v2';

    const PANEL_REG_KEY = 'cx_helper_active_panel_v2';
    const PANEL_INSTANCE_ID = `${Date.now()}_${Math.random().toString(36).slice(2, 8)}`;
    const FRAME_DEPTH = (() => { let d = 0; try { let w = window; while (w !== w.top) { d++; w = w.parent; } } catch { d = 999; } return d; })();
    let isActiveOwner = false;
    let createdPanelEl = null;
    const HEARTBEAT_INTERVAL_MS = 2000;
    const STALE_MS = 7000;
    let heartbeatTimerId = null;
    let lastAutoSkipTs = 0;
    let emptyChecksCount = 0;
    let lastEmptySectionKey = '';
    let recoveryTimerId = null;


    const API_BASE = 'https://116611.xyz';
    const MONEY_YUAN = (() => {
        try {
            const b64 = 'OC4wMA==';
            return atob(b64);
        } catch {
            return '8.00';
        }
    })();
    const PAY_NAME = 'XHelper 解锁/赞助';
    const DEFAULT_PAY = 'wxpay';
    const LS_KEY_DEV_ID = 'cxhelper_device_id';
    const LS_KEY_FREE = 'cxhelper_free_used';
    const LS_KEY_LICENSED = 'cxhelper_licensed';
    const POLL_MS_PAY = 3000;
    const POLL_MAX_PAY = 100;


    const getFreeLimit = (() => {
        let cached = null;
        return function() {
            if (cached != null) return cached;
            try {

                const b64 = 'JDEw';
                const decoded = atob(b64);
                const n = parseInt(decoded.replace(/\D/g, ''), 10);
                cached = Number.isFinite(n) ? n : 10;
            } catch {
                cached = 10;
            }
            return cached;
        };
    })();

    function getDeviceIdPaid() {
        try {
            let id = localStorage.getItem(LS_KEY_DEV_ID);
            if (!id) {
                id = ([1e7]+-1e3+-4e3+-8e3+-1e11).replace(/[018]/g, c => (c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> c / 4).toString(16));
                localStorage.setItem(LS_KEY_DEV_ID, id);
            }
            return id;
        } catch { return 'dev_' + Math.random().toString(36).slice(2); }
    }
    const DEVICE_ID_PAID = getDeviceIdPaid();

    function getCookie(key) {
        try {
            const name = key + '=';
            const parts = document.cookie.split(';');
            for (let part of parts) {
                const s = part.trim();
                if (s.indexOf(name) === 0) return decodeURIComponent(s.substring(name.length));
            }
            return '';
        } catch { return ''; }
    }
    function setCookie(key, value, days, domain) {
        try {
            const d = new Date();
            d.setTime(d.getTime() + ((days || 365) * 24 * 60 * 60 * 1000));
            const expires = 'expires=' + d.toUTCString();
            const dm = domain ? ';domain=' + domain : '';
            document.cookie = key + '=' + encodeURIComponent(value) + ';path=/' + ';' + expires + dm;
        } catch {}
    }
    function isLocallyLicensed() {
        try {
            // 优先从跨子域Cookie读取，保障不同页面一致
            const c = getCookie(LS_KEY_LICENSED);
            if (c === '1') return true;
            return localStorage.getItem(LS_KEY_LICENSED) === '1';
        } catch { return false; }
    }
    function setLocallyLicensed() {
        try { localStorage.setItem(LS_KEY_LICENSED, '1'); } catch {}
        // 写入跨子域Cookie，统一所有 *.chaoxing.com 页面状态
        try { setCookie(LS_KEY_LICENSED, '1', 365, '.chaoxing.com'); } catch {}
    }
    function getFreeUsedCount() {
        try { return parseInt(localStorage.getItem(LS_KEY_FREE) || '0', 10) || 0; } catch { return 0; }
    }
    function incFreeUsedCount() {
        try { const n = getFreeUsedCount() + 1; localStorage.setItem(LS_KEY_FREE, String(n)); return n; } catch { return 0; }
    }

    async function checkLicensePaid() {
        if (isLocallyLicensed()) return true;
        try {
            const r = await fetch(`${API_BASE}/api/license/status?deviceId=${encodeURIComponent(DEVICE_ID_PAID)}`, { credentials: 'omit' });
            const ct = (r.headers.get('content-type') || '').toLowerCase();
            const data = ct.includes('application/json') ? await r.json() : await r.text();
            const ok = !!(data && data.licensed);
            if (ok) setLocallyLicensed();
            // try { updateTrialBadge(); } catch {}
            return ok;
        } catch { return false; }
    }

    async function startPaymentPaid(payType) {
        const win = window.open('', '_blank');
        try {
            const resp = await fetch(`${API_BASE}/api/create`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/json' },
                body: JSON.stringify({
                    name: PAY_NAME,
                    money: MONEY_YUAN,
                    type: payType || DEFAULT_PAY,
                    param: DEVICE_ID_PAID
                })
            });
            const html = await resp.text();
            win.document.open();
            win.document.write(html);
            win.document.close();
            return true;
        } catch (e) {
            if (win) win.close();
            alert('发起支付失败：' + e.message);
            return false;
        }
    }

    async function pollUntilLicensedPaid(onProgress) {
        for (let i = 0; i < POLL_MAX_PAY; i++) {
            if (onProgress) { try { onProgress(i); } catch {} }
            const ok = await checkLicensePaid();
            if (ok) { setLocallyLicensed(); return true; }
            await new Promise(r => setTimeout(r, POLL_MS_PAY));
        }
        return false;
    }

    function showPayModalPaid(messageText) {
        return new Promise(resolve => {
            const mask = document.createElement('div');
            mask.style.cssText = 'position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:999998;backdrop-filter:blur(4px);';
            const box = document.createElement('div');
            box.style.cssText = 'position:fixed;left:50%;top:120px;transform:translateX(-50%);width:420px;background:#fff;border-radius:16px;box-shadow:0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);overflow:hidden;z-index:999999;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Arial;';
            const msg = messageText || '试用已用完，打赏8元永久解锁哦';
            box.innerHTML = (
                '<div style="padding:18px 24px;border-bottom:1px solid #f3f4f6;font-weight:700;font-size:16px;color:#111827;">解锁全部功能（永久）</div>' +
                '<div style="padding:24px;">' +
                    '<div style="margin-bottom:16px;font-size:14px;color:#4b5563;line-height:1.5;">' + msg + '</div>' +
                    '<div style="margin-bottom:20px;background:#f9fafb;padding:16px;border-radius:12px;border:1px solid #f3f4f6;">' +
                        '<div style="display:flex;gap:20px;">' +
                            '<label style="display:flex;align-items:center;gap:8px;cursor:pointer;font-size:14px;font-weight:500;color:#374151;"><input type="radio" name="cx_pay" value="wxpay" checked style="accent-color:#6366f1;"> 微信支付</label>' +
                            '<label style="display:flex;align-items:center;gap:8px;cursor:pointer;font-size:14px;font-weight:500;color:#374151;"><input type="radio" name="cx_pay" value="alipay" style="accent-color:#6366f1;"> 支付宝</label>' +
                        '</div>' +
                        '<div style="color:#9ca3af;font-size:12px;margin-top:10px;">若支付方式不可用请尝试切换</div>' +
                    '</div>' +
                    '<div id="cx_tip_paid" style="color:#6b7280;font-size:13px;line-height:1.5;padding:0 4px;">点击"去支付"将打开收银台，完成后此处会自动检测。</div>' +
                '</div>' +
                '<div style="padding:16px 24px;background:#f9fafb;border-top:1px solid #f3f4f6;text-align:right;display:flex;justify-content:flex-end;gap:12px;">' +
                    '<button id="cx_cancel_paid" style="padding:10px 20px;border-radius:10px;border:1px solid #e5e7eb;background:#fff;color:#4b5563;cursor:pointer;font-size:14px;font-weight:600;transition:all 0.2s;">取消</button>' +
                    '<button id="cx_go_pay" style="padding:10px 24px;border-radius:10px;border:none;background:#6366f1;color:#fff;cursor:pointer;font-size:14px;font-weight:600;transition:all 0.2s;box-shadow:0 4px 6px -1px rgba(99, 102, 241, 0.2);">去支付</button>' +
                '</div>'
            );
            document.body.appendChild(mask);
            document.body.appendChild(box);

            const tip = box.querySelector('#cx_tip_paid');
            const btnPay = box.querySelector('#cx_go_pay');
            const btnCancel = box.querySelector('#cx_cancel_paid');

            function close() { try { box.remove(); mask.remove(); } catch {} }

            btnCancel.onclick = () => { close(); resolve(false); };
            btnPay.onclick = async () => {
                btnPay.disabled = true;
                btnPay.textContent = '打开收银台...';
                const payType = (box.querySelector('input[name="cx_pay"]:checked') || {}).value || DEFAULT_PAY;
                const ok = await startPaymentPaid(payType);
                if (!ok) { btnPay.disabled = false; btnPay.textContent = '去支付'; return; }
                btnPay.textContent = '检测支付中...';
                if (tip) tip.innerHTML = '已打开收银台，请完成支付，完成后此处会自动解锁...<br><span style="color:#6366f1;font-size:12px;margin-top:4px;display:block;font-weight:600;">💡 若无法打开支付页面请尝试连接手机热点网络</span>';
                const done = await pollUntilLicensedPaid();
                if (done) {
                    if (tip) tip.textContent = '支付成功，正在解锁...';
                    setLocallyLicensed();
                    try { updateTrialBadge(); } catch {}
                    setTimeout(() => { close(); resolve(true); }, 500);
                } else {
                    btnPay.disabled = false;
                    btnPay.textContent = '去支付';
                    if (tip) tip.textContent = '未检测到支付完成，可重试或稍后再次打开本面板。';
                }
            };
        });
    }

    function showFeedbackModal() {
        const mask = document.createElement('div');
        mask.style.cssText = 'position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:999998;backdrop-filter:blur(4px);';
        const box = document.createElement('div');
        box.style.cssText = 'position:fixed;left:50%;top:120px;transform:translateX(-50%);width:400px;background:#fff;border-radius:16px;box-shadow:0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);overflow:hidden;z-index:999999;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Arial;';
        box.innerHTML = (
            '<div style="padding:18px 24px;border-bottom:1px solid #f3f4f6;font-weight:700;font-size:16px;color:#111827;">意见反馈</div>' +
            '<div style="padding:24px;text-align:center;">' +
                '<div style="margin-bottom:20px;font-size:14px;color:#4b5563;line-height:1.6;">' +
                    '如果您在使用过程中遇到问题或有任何建议，欢迎通过以下方式联系我们：' +
                '</div>' +
                '<div style="background:#f9fafb;border:1px solid #f3f4f6;border-radius:12px;padding:20px;margin:16px 0;">' +
                    '<div style="font-size:13px;font-weight:600;color:#6366f1;margin-bottom:8px;text-transform:uppercase;letter-spacing:0.05em;">联系邮箱</div>' +
                    '<div style="font-size:18px;font-weight:700;color:#111827;cursor:pointer;display:inline-block;padding:4px 8px;border-radius:6px;transition:background 0.2s;" onclick="navigator.clipboard.writeText(\'2036470448@qq.com\')" title="点击复制" onmouseover="this.style.background=\'#eef2ff\'" onmouseout="this.style.background=\'transparent\'">2036470448@qq.com</div>' +
                    '<div style="font-size:12px;color:#9ca3af;margin-top:8px;">点击邮箱地址即可复制</div>' +
                '</div>' +
                '<div style="font-size:13px;color:#6b7280;margin-top:16px;line-height:1.5;">我们将会认真对待每一条反馈，并且尽快回复您的问题。您的建议是我们改进产品的重要动力！</div>' +
            '</div>' +
            '<div style="padding:16px 24px;background:#f9fafb;border-top:1px solid #f3f4f6;text-align:right;">' +
                '<button id="feedback-close" style="padding:10px 24px;border-radius:10px;border:none;background:#6366f1;color:#fff;cursor:pointer;font-size:14px;font-weight:600;transition:all 0.2s;box-shadow:0 4px 6px -1px rgba(99, 102, 241, 0.2);">关闭</button>' +
            '</div>'
        );
        document.body.appendChild(mask);
        document.body.appendChild(box);

        const closeBtn = box.querySelector('#feedback-close');
        function close() {
            try {
                box.remove();
                mask.remove();
            } catch {}
        }

        closeBtn.onclick = close;
        mask.onclick = close;


        const emailDiv = box.querySelector('[onclick*="clipboard"]');
        if (emailDiv) {
            emailDiv.addEventListener('click', function() {
                const originalText = this.innerHTML;
                this.innerHTML = '✅ 已复制到剪贴板';
                this.style.color = '#2563eb';
                setTimeout(() => {
                    this.innerHTML = originalText;
                    this.style.color = '#333';
                }, 2000);
            });
        }
    }

    async function ensureAccessAllowed() {
        if (await checkLicensePaid()) return true;
        const used = getFreeUsedCount();
        if (used < getFreeLimit()) { incFreeUsedCount(); try { updateTrialBadge(); } catch {} return true; }
        const ok = await showPayModalPaid();
        if (ok) { setLocallyLicensed(); try { updateTrialBadge(); } catch {} return true; }
        throw new Error('试用已用完，请解锁后继续使用');
    }

    function getActivePanelRecord() {
        try { const raw = localStorage.getItem(PANEL_REG_KEY); return raw ? JSON.parse(raw) : null; } catch { return null; }
    }
    function setActivePanelRecord(rec) {
        try { localStorage.setItem(PANEL_REG_KEY, JSON.stringify(rec)); } catch {}
    }
    function clearActivePanelRecordIfOwner() {
        try {
            const cur = getActivePanelRecord();
            if (cur && cur.id === PANEL_INSTANCE_ID) {
                localStorage.removeItem(PANEL_REG_KEY);
            }
        } catch {}
    }
    function shouldWeOwn(current) {
        const nowTs = Date.now();
        if (!current) return { own: true, ts: nowTs };

        if (!current.aliveTs || nowTs - current.aliveTs > STALE_MS) return { own: true, ts: nowTs };

        try { if (current.url && current.url !== location.href) return { own: true, ts: nowTs }; } catch {}

        if (FRAME_DEPTH > (current.depth || 0)) return { own: true, ts: nowTs };
        if (FRAME_DEPTH === (current.depth || 0) && nowTs > (current.ts || 0)) return { own: true, ts: nowTs };
        return { own: false, ts: nowTs };
    }
    function claimOwnership() {
        const cur = getActivePanelRecord();
        const decision = shouldWeOwn(cur);
        if (decision.own) {
            setActivePanelRecord({ id: PANEL_INSTANCE_ID, depth: FRAME_DEPTH, ts: decision.ts, aliveTs: Date.now(), url: location.href });
            isActiveOwner = true;
        } else {
            isActiveOwner = false;
        }
        return isActiveOwner;
    }
    function startHeartbeat() {
        if (heartbeatTimerId) return;
        heartbeatTimerId = setInterval(() => {
            if (!isActiveOwner) return;
            const cur = getActivePanelRecord();

            if (!cur || cur.id !== PANEL_INSTANCE_ID) { stopHeartbeat(); return; }
            cur.aliveTs = Date.now();
            try { cur.url = location.href; } catch {}
            setActivePanelRecord(cur);
        }, HEARTBEAT_INTERVAL_MS);
    }
    function stopHeartbeat() { if (heartbeatTimerId) { clearInterval(heartbeatTimerId); heartbeatTimerId = null; } }
    const cleanupOwnership = () => {
        stopHeartbeat();
        clearActivePanelRecordIfOwner();
    };
    window.addEventListener('beforeunload', cleanupOwnership);
    window.addEventListener('pagehide', cleanupOwnership);

    function destroyPanelAndStop() {
        try {
            if (studyIntervalId) { clearInterval(studyIntervalId); studyIntervalId = null; }
            isStudyingChapters = false;
            isAnswering = false;
            stopHeartbeat();
            const panel = document.getElementById('answer-helper-panel');
            if (panel && panel.parentNode) panel.parentNode.removeChild(panel);
            createdPanelEl = null;
        } catch {}
    }
    window.addEventListener('storage', (e) => {
        if (e.key !== PANEL_REG_KEY) return;
        const rec = getActivePanelRecord();
        if (!rec) return;
        if (rec.id === PANEL_INSTANCE_ID) {

            if (!createdPanelEl) {
                try { createdPanelEl = createPanel(); bindPanelEvents(); } catch {}
            }
            isActiveOwner = true;
            startHeartbeat();
        } else {

            isActiveOwner = false;
            destroyPanelAndStop();
        }
    });


    GM_addStyle(`
        /* Panel: Modern Light Theme */
        #answer-helper-panel {
            --ah-panel-height: 340px;
            position: fixed;
            top: 24px;
            left: 24px;
            width: 320px;
            min-width: 320px;
            max-width: 320px;
            height: var(--ah-panel-height) !important;
            min-height: var(--ah-panel-height) !important;
            max-height: var(--ah-panel-height) !important;
            background: #ffffff;
            border: 1px solid rgba(0, 0, 0, 0.08);
            border-radius: 16px;
            padding: 0;
            z-index: 9999;
            box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            font-family: 'Inter', 'SF Pro Display', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: #1f2937;
            user-select: none;
            overflow: hidden;
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease, height 0.3s ease;
        }

        /* Header */
        #answer-helper-header {
            cursor: move;
            height: 52px;
            padding: 0 18px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: #ffffff;
            border-bottom: 1px solid #f3f4f6;
            font-size: 15px;
            color: #111827;
        }
        #answer-helper-header .title {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            color: #111827;
        }
        #answer-helper-header .title .accent {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #6366f1;
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
        }
        #answer-helper-header .right {
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        #answer-helper-header .collapse-btn {
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: #f9fafb;
            border: 1px solid #f3f4f6;
            cursor: pointer;
            color: #6b7280;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.2s ease;
        }
        #answer-helper-header .collapse-btn:hover { background: #f3f4f6; color: #111827; border-color: #e5e7eb; transform: scale(1.05); }
        .collapse-btn-inner { width: 16px; height: 16px; position: relative; }
        .collapse-icon-bar.horizontal { width: 14px; height: 2px; background: currentColor; border-radius: 1px; position: absolute; left: 1px; top: 7px; }
        .collapse-icon-bar.vertical { width: 2px; height: 14px; background: currentColor; border-radius: 1px; position: absolute; left: 7px; top: 1px; }

        /* Content */
        #answer-helper-content { padding: 12px 16px; overflow-y: auto; height: calc(var(--ah-panel-height) - 52px); max-height: calc(var(--ah-panel-height) - 52px); }
        #answer-helper-panel.collapsed #answer-helper-content { display: none; }
        #answer-helper-panel.collapsed { width: 240px; min-width: 240px; max-width: 240px; height: 52px !important; min-height: 52px !important; border-radius: 12px; }

        /* Body: main on top, actions at bottom */
        #answer-helper-content .panel-body {
            display: grid;
            grid-template-columns: 1fr;
            grid-template-rows: auto auto;
            grid-template-areas:
                "main"
                "actions";
            gap: 12px;
            align-items: start;
        }
        .panel-main { min-width: 0; grid-area: main; }
        .panel-actions { grid-area: actions; }
        .panel-actions.panel-row { display: flex; flex-direction: column; gap: 10px; }
        .panel-actions.panel-row .primary-pair { display: flex; gap: 10px; width: 100%; }
        .panel-actions.panel-row .primary-pair .pair-slot { flex: 1; display: flex; }
        .panel-actions.panel-row .primary-pair .pair-slot .ah-btn { flex: 1; min-height: 44px; border-radius: 12px; }
        .panel-actions.panel-row .ah-btn { min-height: 40px; padding: 8px 12px; border-radius: 10px; }

        /* Toast */
        #no-task-toast {
            position: fixed;
            top: 24px;
            right: 24px;
            background: #ffffff;
            border: 1px solid rgba(0,0,0,0.05);
            color: #111827;
            padding: 12px 20px;
            border-radius: 12px;
            font-size: 14px;
            font-weight: 500;
            z-index: 10000;
            box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
            animation: fadeInOut 3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
        }
        @keyframes fadeInOut {
            0% { opacity: 0; transform: translateY(-20px) scale(0.95); }
            10% { opacity: 1; transform: translateY(0) scale(1); }
            90% { opacity: 1; transform: translateY(0) scale(1); }
            100% { opacity: 0; transform: translateY(-20px) scale(0.95); }
        }

        /* Terminal Log */
        #answer-log {
            height: 140px;
            overflow-y: auto;
            border: 1px solid #f3f4f6;
            border-radius: 12px;
            padding: 10px;
            margin-bottom: 8px;
            font-size: 12px;
            line-height: 1.6;
            font-family: 'JetBrains Mono', 'Fira Code', 'Menlo', monospace;
            background: #f9fafb;
            color: #4b5563;
        }
        #answer-log::-webkit-scrollbar { width: 6px; }
        #answer-log::-webkit-scrollbar-track { background: transparent; }
        #answer-log::-webkit-scrollbar-thumb { background: #e5e7eb; border-radius: 10px; }
        #answer-log::-webkit-scrollbar-thumb:hover { background: #d1d5db; }

        .log-item { margin: 4px 0; padding: 6px 10px; border-radius: 8px; background: #ffffff; border: 1px solid #f3f4f6; box-shadow: 0 1px 2px rgba(0,0,0,0.02); }
        .success { color: #059669; border-left: 3px solid #10b981; }
         .error { color: #dc2626; border-left: 3px solid #ef4444; }
         .info  { color: #374151; border-left: 3px solid #6b7280; }
         .debug { color: #6b7280; border-left: 3px solid #9ca3af; }

        /* Buttons */
        .ah-btn {
            flex: 1;
            padding: 8px 14px;
            border: 1px solid #e5e7eb;
            border-radius: 10px;
            font-size: 13px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            color: #374151;
            background: #ffffff;
        }
        .ah-btn:hover { background: #f9fafb; border-color: #d1d5db; transform: translateY(-1px); box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05); }
        .ah-btn:active { transform: translateY(0); box-shadow: none; }

        .ah-primary { background: #6366f1; color: #ffffff; border-color: #4f46e5; }
        .ah-primary:hover { background: #4f46e5; border-color: #4338ca; box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3); }

        .ah-danger { background: #ffffff; color: #ef4444; border-color: #fee2e2; }
        .ah-danger:hover { background: #fef2f2; border-color: #fca5a5; }

        .ah-secondary { background: #f9fafb; color: #4b5563; border-color: #f3f4f6; }
        .ah-secondary:hover { background: #f3f4f6; border-color: #e5e7eb; }

        .ah-success { background: #10b981; color: #ffffff; border-color: #059669; }
        .ah-success:hover { background: #059669; box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3); }

        /* Speed buttons */
        .speed-button { transition: all 0.2s ease; border-radius: 8px; }
        .speed-active { background: #6366f1 !important; color: #ffffff !important; border-color: #4f46e5 !important; }
        #playback-speed-controls.segmented { display: flex; gap: 6px; justify-content: flex-end; margin-top: 6px; }
        #playback-speed-controls.segmented .ah-btn { min-width: 60px; padding: 6px 8px; font-size: 12px; }

        /* Trial Badge */
        #answer-helper-panel .cx-trial-badge { position: absolute; left: 16px; bottom: 12px; color: #9ca3af; font-size: 11px; }
        #answer-helper-panel .cx-trial-badge .trial-buy-btn {
            display: inline-block;
            margin-left: 8px;
            padding: 2px 8px;
            font-size: 11px;
            border: 1px solid #e0e7ff;
            background: #eef2ff;
            color: #4f46e5;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
        }
        #answer-helper-panel .cx-trial-badge .trial-buy-btn:hover { background: #e0e7ff; border-color: #c7d2fe; }
    `);


    function createPanel() {
        const panel = document.createElement('div');
        panel.id = 'answer-helper-panel';
        panel.innerHTML = `
            <div id="answer-helper-header">
                <span class="title"><span class="accent"></span>学习通研习助手</span>
                <div class="right">
                    <button id="feedback-btn" class="ah-btn ah-secondary" style="min-width:32px; width:32px; height:32px; padding:0; border-radius:8px;">
                        <span class="button-icon" style="margin:0; font-size:14px;">💬</span>
                    </button>
                    <button class="collapse-btn" title="折叠/展开">
                      <span class="collapse-btn-inner">
                        <span class="collapse-icon-bar horizontal"></span>
                      </span>
                    </button>
                </div>
            </div>
            <div id="answer-helper-content">
                <div class="panel-body">
                    <div class="panel-main">
                        <div id="answer-log"></div>
                        <div id="playback-speed-controls" class="segmented" style="display:none;">
                            <button id="speed-1x" class="ah-btn ah-secondary speed-button speed-active"><span class="button-icon">1×</span></button>
                            <button id="speed-1.5x" class="ah-btn ah-secondary speed-button"><span class="button-icon">1.5×</span></button>
                            <button id="speed-2x" class="ah-btn ah-secondary speed-button"><span class="button-icon">2×</span></button>
                        </div>
                    </div>
                    <div class="panel-actions panel-row">
                        <div class="primary-pair">
                            <div class="pair-slot">
                                <button id="start-answer" class="ah-btn ah-primary">
                                    <span class="button-icon">▶</span>
                                    <span class="button-text">一键答题</span>
                                </button>
                                <button id="pause-answer" class="ah-btn ah-danger" style="display:none;">
                                    <span class="button-icon">⏸</span>
                                    <span class="button-text">暂停答题</span>
                                </button>
                            </div>
                            <div class="pair-slot">
                                <button id="start-study" class="ah-btn ah-primary">
                                    <span class="button-icon">⏯</span>
                                    <span class="button-text">刷章节与测验</span>
                                </button>
                                <button id="pause-study" class="ah-btn ah-danger" style="display:none;">
                                    <span class="button-icon">■</span>
                                    <span class="button-text">暂停刷章节</span>
                                </button>
                            </div>
                        </div>
                    </div>
                </div>
            </div>
            <div id="cx_trial_badge" class="cx-trial-badge">
                检测中...
                <button id="buy-license" class="trial-buy-btn" style="display:none">购买授权</button>
            </div>
        `;
        document.body.appendChild(panel);
        try { panel.style.setProperty('--ah-panel-height', '340px'); } catch {}


        try {
            const rect = panel.getBoundingClientRect();
            const winW = window.innerWidth || document.documentElement.clientWidth;
            const winH = window.innerHeight || document.documentElement.clientHeight;
            const left = Math.max(12, Math.round((winW - rect.width) / 2));
            let isQuizPage = false;
            try {
                forEachAllSameOriginDocs((doc) => {
                    if (isQuizPage) return;
                    if (isQuizPageDoc(doc)) isQuizPage = true;
                });
            } catch {}
            const centerTop = Math.round((winH - rect.height) / 2);
            const offset = Math.round(winH * 0.1);
            const desiredTop = isQuizPage ? Math.round(winH * 0.08) : (centerTop - offset);
            const top = Math.max(12, Math.min(desiredTop, Math.max(12, winH - rect.height - 12)));
            panel.style.left = left + 'px';
            panel.style.top = top + 'px';
            panel.style.right = 'auto';
        } catch {}


        let isDragging = false, offsetX = 0, offsetY = 0;
        const header = panel.querySelector('#answer-helper-header');
        header.addEventListener('mousedown', function(e) {
            if (e.target.classList.contains('collapse-btn')) return;
            isDragging = true;
            const rect = panel.getBoundingClientRect();
            offsetX = e.clientX - rect.left;
            offsetY = e.clientY - rect.top;
            document.body.style.userSelect = 'none';
        });
        document.addEventListener('mousemove', function(e) {
            if (!isDragging) return;
            panel.style.left = (e.clientX - offsetX) + 'px';
            panel.style.top = (e.clientY - offsetY) + 'px';
            panel.style.right = 'auto';
        });
        document.addEventListener('mouseup', function() {
            isDragging = false;
            document.body.style.userSelect = '';
        });


        const collapseBtn = panel.querySelector('.collapse-btn');
        const collapseBtnInner = collapseBtn.querySelector('.collapse-btn-inner');
        collapseBtn.addEventListener('click', function() {
            panel.classList.toggle('collapsed');
            collapseBtnInner.innerHTML = '';
            if (panel.classList.contains('collapsed')) {

                const h = document.createElement('span');
                h.className = 'collapse-icon-bar horizontal';
                const v = document.createElement('span');
                v.className = 'collapse-icon-bar vertical';
                collapseBtnInner.appendChild(h);
                collapseBtnInner.appendChild(v);
            } else {

                const h = document.createElement('span');
                h.className = 'collapse-icon-bar horizontal';
                collapseBtnInner.appendChild(h);
            }
        });
        return panel;
    }

    function setPanelFixedHeight(px) {
        const panel = document.getElementById('answer-helper-panel');
        if (!panel) return;
        const val = Math.max(200, Math.round(px || 0)) + 'px';
        try { panel.style.setProperty('--ah-panel-height', val); } catch {}
        try {
            const rect = panel.getBoundingClientRect();
            const winH = window.innerHeight || document.documentElement.clientHeight;
            const maxTop = Math.max(12, winH - rect.height - 12);
            if (rect.top > maxTop) panel.style.top = maxTop + 'px';
        } catch {}
    }

    function bindPanelEvents() {
        document.getElementById('start-answer')?.addEventListener('click', () => {
            addLog('本助手仅供学习研究，请遵守课程与平台规则。', 'info');
            addLog('开始自动答题...');
            autoAnswer();
        });
        document.getElementById('pause-answer')?.addEventListener('click', () => {
            isAnswering = false;
            addLog('正在暂停自动答题...', 'info');
        });
        const startStudyBtn = document.getElementById('start-study');
        const pauseStudyBtn = document.getElementById('pause-study');
        if (startStudyBtn && pauseStudyBtn) {
            startStudyBtn.addEventListener('click', () => {
                addLog('本助手仅供学习研究，请遵守课程与平台规则。', 'info');
                startStudyChapters();
            });
            pauseStudyBtn.addEventListener('click', () => { stopStudyChapters(); });
        }


        document.getElementById('speed-1x')?.addEventListener('click', () => {
            setVideoPlaybackSpeed(1.0);
        });
        document.getElementById('speed-1.5x')?.addEventListener('click', () => {
            setVideoPlaybackSpeed(1.5);
        });
        document.getElementById('speed-2x')?.addEventListener('click', () => {
            setVideoPlaybackSpeed(2.0);
        });


        updateSpeedButtonsState();

        const buyBtn = document.getElementById('buy-license');
        if (buyBtn) {
            buyBtn.addEventListener('click', async () => {
                try {
                    await showPayModalPaid('免费试用，打赏8元永久解锁哦');
                } catch (e) {
                    addLog('打开支付弹窗失败: ' + (e && e.message ? e.message : e), 'error');
                }
            });
        }
        document.getElementById('feedback-btn')?.addEventListener('click', () => { showFeedbackModal(); });


        setTimeout(updateTrialBadge, 0);
    }


    function safeClick(el) {
        try {
            if (!el) return false;
            el.click();
            el.dispatchEvent(new MouseEvent('click', { bubbles: true }));
            return true;
        } catch { return false; }
    }


    function forEachSameOriginFrame(callback) {
        const visit = (win) => {
            for (let i = 0; i < win.frames.length; i++) {
                const f = win.frames[i];
                try {
                    const doc = f.document || f.contentDocument;
                    if (doc && doc.location && doc.location.href.includes('.chaoxing.com')) {
                        callback(doc);
                        visit(f);
                    }
                } catch {  }
            }
        };
        try { callback(document); } catch {}
        try { visit(window); } catch {}
    }


    function forEachAllSameOriginDocs(callback) {
        const seen = new Set();
        const visit = (win) => {
            if (!win || seen.has(win)) return;
            seen.add(win);
            try {
                const doc = win.document || win.contentDocument;
                if (doc) callback(doc);
            } catch {}
            try {
                const len = win.frames ? win.frames.length : 0;
                for (let i = 0; i < len; i++) {
                    try { visit(win.frames[i]); } catch {}
                }
            } catch {}
        };
        try { visit(window.top); } catch { visit(window); }
    }


    async function waitForQuestionsRenderAny(timeoutMs = 8000) {
        const end = Date.now() + timeoutMs;
        const selector = '.question, .questionLi, .subject_item, .examPaper_subject, .questionContainer, .q-item, .subject_node, [class*="question"], .ti-item, .exam-item';
        while (Date.now() < end) {
            let hit = null;
            forEachAllSameOriginDocs((doc) => {
                if (hit) return;
                try {
                    const qs = doc.querySelectorAll(selector);
                    if (qs && qs.length > 0) hit = doc;
                } catch {}
            });
            if (hit) return hit;
            await new Promise(r => setTimeout(r, 300));
        }
        return null;
    }


    function gotoNextSection(contextDoc) {
        const docsToTry = [];
        if (contextDoc) docsToTry.push(contextDoc);
        try { if (window.top && window.top.document) docsToTry.push(window.top.document); } catch {}
        docsToTry.push(document);

        const textNextRegex = /下一(节|章|单元|页|个)|继续|下一步|下一个|Next/i;
        const nextBtnSelectors = [
            '.next', '.vc-next', '.reader-next', 'a[title="下一页"]', '.btn-next', '#next',
            '.prev_next .right a', '.switch-btn.next', '.icon-arrow-right', '.right-btn .next'
        ];
        const currentNodeSelectors = ['.cur', '.curr', 'li.active', 'li.selected', '.posCatalog_active'];


        try { if (isStudyingChapters) localStorage.setItem(STUDY_PERSIST_KEY, '1'); } catch {}

        for (const doc of docsToTry) {
            try {

                for (const sel of nextBtnSelectors) {
                    const btn = doc.querySelector(sel);
                    if (btn && !btn.getAttribute('disabled') && !String(btn.className).includes('disabled')) {
                        if (safeClick(btn)) { addLog('检测到下一节按钮，已点击', 'success'); return true; }
                    }
                }


                for (const curSel of currentNodeSelectors) {
                    const cur = doc.querySelector(curSel);
                    if (cur && cur.nextElementSibling) {
                        const link = cur.nextElementSibling.querySelector('a');
                        if (link && safeClick(link)) { addLog('目录定位到下一小节', 'success'); return true; }
                    }
                }


                const links = Array.from(doc.querySelectorAll('a[href*="knowledgeId"], a[href*="chapterId"], a[href*="studentstudy"]'));
                if (links.length > 1) {
                    const hrefNow = (location && location.href) || '';
                    const idx = links.findIndex(a => (a.href || '').includes('knowledgeId') && hrefNow.includes('knowledgeId') && a.href.split('knowledgeId')[1] === hrefNow.split('knowledgeId')[1]);
                    const next = idx >= 0 ? links[idx + 1] : null;
                    if (next && safeClick(next)) { addLog('通过目录链接顺序跳转下一小节', 'success'); return true; }
                }


                const clickable = Array.from(doc.querySelectorAll('a, button, .btn, .el-button, .next'));
                for (const el of clickable) {
                    const txt = (el.textContent || '').trim();

                    if (textNextRegex.test(txt)) {

                        const excludeClasses = ['close', 'cancel', 'delete', 'remove', 'back', 'prev', 'disabled', 'popup', 'modal'];
                        const hasExcludeClass = excludeClasses.some(cls =>
                            el.className.toLowerCase().includes(cls) ||
                            el.id.toLowerCase().includes(cls)
                        );


                        const isVisible = el.offsetWidth > 0 && el.offsetHeight > 0 &&
                                        window.getComputedStyle(el).display !== 'none' &&
                                        window.getComputedStyle(el).visibility !== 'hidden';


                        const isValidNavigationElement = (
                            (el.tagName === 'A' && (el.href || el.onclick)) ||
                            (el.tagName === 'BUTTON' && el.onclick) ||
                            el.className.includes('btn') ||
                            el.className.includes('next')
                        ) && !el.closest('.popup, .modal, .dialog, .alert');


                        const isNavigationText = /^(下一节|下一章|下一个|下一页|继续|Next)$/i.test(txt);

                        if (!hasExcludeClass && isVisible && isValidNavigationElement && isNavigationText) {
                            if (safeClick(el)) {
                                addLog(`通过文本匹配跳转: ${txt}`, 'success');
                                return true;
                            }
                        } else {
                            addLog(`跳过不合适的文本匹配元素: ${txt} (类名: ${el.className})`, 'debug');
                        }
                    }
                }
            } catch {}
        }
        addLog('未能自动跳转到下一小节', 'error');
        return false;
    }


    function handleVideosInDocument(doc) {
        try {
            const videos = doc.querySelectorAll('video, .video-js video');
            if (videos.length === 0) return false;
            let any = false;
            videos.forEach(v => {
                try {
                    v.muted = true;
                    if (!Number.isNaN(v.playbackRate)) v.playbackRate = currentPlaybackSpeed;
                    const p = v.play(); if (p && typeof p.catch === 'function') p.catch(() => {});

                    v.loop = false;


                    if (!v.dataset.autonextBind) {
                        v.dataset.autonextBind = '1';


                        v.addEventListener('ended', () => {
                            if (v.dataset.disableAutoNext === '1' || !isStudyingChapters) return;
                            addLog('视频播放结束，进行完成度检测', 'success');
                            setTimeout(() => ensureSectionCompletedAndAdvance(doc), 300);
                        }, { passive: true });


                        let nearingFired = false;
                        const onTimeUpdate = () => {
                            if (v.dataset.disableAutoNext === '1' || !isStudyingChapters) return;
                            try {
                                const d = v.duration || 0;
                                const t = v.currentTime || 0;
                                if (d > 0 && (d - t) <= 1.0 && !nearingFired) {
                                    nearingFired = true;
                                    addLog('检测到视频即将结束，进行完成度检测', 'debug');
                                    setTimeout(() => ensureSectionCompletedAndAdvance(doc), 800);
                                }
                            } catch {}
                        };
                        v.addEventListener('timeupdate', onTimeUpdate, { passive: true });
                    }
                    any = true;
                } catch {}
            });

            const popBtns = doc.querySelectorAll('.ans-job-icon, .popBtn, .dialog-footer .btn, .ans-modal .btn, .vjs-big-play-button');
            popBtns.forEach(b => safeClick(b));
            return any;
        } catch { return false; }
    }


    function handlePPTInDocument(doc) {
        try {
            const nextSelectors = ['.next', '.vc-next', '.reader-next', 'a[title="下一页"]', '.btn-next', '#next'];
            for (const sel of nextSelectors) {
                const btn = doc.querySelector(sel);
                if (btn && !btn.className.includes('disabled') && !btn.getAttribute('disabled')) {
                    if (safeClick(btn)) { addLog('PPT自动下一页', 'debug'); return true; }
                }
            }

            const container = doc.scrollingElement || doc.body;
            if (container) container.scrollTop = container.scrollHeight;
            return false;
        } catch { return false; }
    }


    function findChapterQuizTab(doc) {
        try {

            const byTitle = doc.querySelector('li[title*="章节测验"], li[title*="测验"], a[title*="章节测验"], a[title*="测验"]');
            if (byTitle) return byTitle;

            const byOnClick = Array.from(doc.querySelectorAll('li[onclick], a[onclick], button[onclick]')).find(el => {
                const oc = (el.getAttribute('onclick') || '').toString();
                return oc.includes('changeDisplayContent') && (oc.includes('(2,2') || oc.includes(',2)'));
            });
            if (byOnClick) return byOnClick;

            const candidates = Array.from(doc.querySelectorAll('li, a, button, [role="tab"], [role="option"]'));
            const textEl = candidates.find(el => /章节测验|测验/.test(((el.textContent || el.getAttribute('title') || '') + '').trim()));
            if (textEl) return textEl;
        } catch {}
        return null;
    }


    async function waitForQuestionsRender(doc, timeoutMs = 6000) {
        const end = Date.now() + timeoutMs;
        while (Date.now() < end) {
            try {
                const qs = doc.querySelectorAll('.question, .questionLi, .subject_item, .examPaper_subject, .questionContainer, .q-item, .subject_node, [class*="question"], .ti-item, .exam-item');
                if (qs.length > 0) return true;
            } catch {}
            await new Promise(r => setTimeout(r, 300));
        }
        return false;
    }



    let TYPR_MD5_LIB, FONT_TABLE_DATA;
    try {
        TYPR_MD5_LIB = GM_getResourceText('typrMd5Lib');
        FONT_TABLE_DATA = GM_getResourceText('fontTableData');


        if (TYPR_MD5_LIB) {
            window.TYPR_MD5_LIB = TYPR_MD5_LIB;
        }
        if (FONT_TABLE_DATA) {
            window.FONT_TABLE_DATA = FONT_TABLE_DATA;
        }
    } catch (e) {
        console.error('加载外部资源失败:', e);

        TYPR_MD5_LIB = '';
        FONT_TABLE_DATA = '{}';
    }


    function injectConsoleDecryptCode(doc, timeoutMs = 3000) {
        return new Promise((resolve) => {
            try {
                const consoleCode = `

if (!window.Typr || !window.md5) {
    ${TYPR_MD5_LIB || window.TYPR_MD5_LIB || ''}
}


if (!window.chaoXingFontTable) {
    window.chaoXingFontTable = ${FONT_TABLE_DATA || window.FONT_TABLE_DATA || '{}'};
}


const decryptChaoXingFont = async () => {
  const { Typr, md5, chaoXingFontTable: table } = window;


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


  const styleElements = [...document.querySelectorAll('style')];
  const cxStyle = styleElements.find(el =>
    el.textContent.includes('font-cxsecret')
  );

  if (!cxStyle) {
    return;
  }


  const fontData = cxStyle.textContent.match(/base64,([\\w\\W]+?)'/)[1];
  const parsedFont = Typr.parse(base64ToUint8Array(fontData))[0];


  const charMap = {};
  for (let charCode = 19968; charCode < 40870; charCode++) {
    const glyph = Typr.U.codeToGlyph(parsedFont, charCode);
    if (!glyph) continue;

    const path = Typr.U.glyphToPath(parsedFont, glyph);
    const pathHash = md5(JSON.stringify(path)).slice(24);
    charMap[String.fromCharCode(charCode)] =
      String.fromCharCode(table[pathHash]);
  }


  document.querySelectorAll('.font-cxsecret').forEach(element => {
    let htmlContent = element.innerHTML;
    Object.entries(charMap).forEach(([encryptedChar, decryptedChar]) => {
      const regex = new RegExp(encryptedChar, 'g');
      htmlContent = htmlContent.replace(regex, decryptedChar);
    });
    element.innerHTML = htmlContent;
    element.classList.remove('font-cxsecret');
  });
};


decryptChaoXingFont().catch(console.error);
`;
                const beforeCnt = (() => { try { return doc.querySelectorAll('.font-cxsecret').length; } catch { return -1; } })();

                let script = doc.createElement('script');
                script.type = 'text/javascript';
                let blobUrl = '';
                try {
                    const blob = new Blob([consoleCode], { type: 'text/javascript' });
                    blobUrl = (doc.defaultView || window).URL.createObjectURL(blob);
                    script.src = blobUrl;
                } catch {

                    script.textContent = consoleCode;
                }
                (doc.head || doc.documentElement).appendChild(script);
                script.onload = () => { try { if (blobUrl) (doc.defaultView || window).URL.revokeObjectURL(blobUrl); } catch {} };

                const start = Date.now();
                const timer = setInterval(() => {
                    try {
                        const cnt = doc.querySelectorAll('.font-cxsecret').length;
                        if (cnt === 0 || (beforeCnt >= 0 && cnt < beforeCnt)) { clearInterval(timer); resolve(); return; }
                    } catch {}
                    if (Date.now() - start > timeoutMs) { clearInterval(timer); resolve(); }
                }, 200);
            } catch { resolve(); }
        });
    }


    async function tryEnterQuizAndAnswer(contextDoc) {
        try {
            if (!isStudyingChapters) return false;
            let targetDoc = null;
            let tabEl = null;

            forEachAllSameOriginDocs((doc) => {
                if (tabEl) return;
                const el = findChapterQuizTab(doc);
                if (el) { tabEl = el; targetDoc = doc; }
            });
            if (!tabEl || !targetDoc) return false;
            addLog('检测到章节测验入口，正在进入...', 'info');

            await new Promise((r) => {
                let pending = 0; let done = false;
                forEachAllSameOriginDocs((doc) => {
                    pending++; injectConsoleDecryptCode(doc).finally(() => { if (--pending === 0 && !done) { done = true; r(); } });
                });
                if (pending === 0) r();
            });

            try { tabEl.scrollIntoView({ block: 'center', behavior: 'smooth' }); } catch {}
            const clicked = safeClick(tabEl);


            const oc = (tabEl.getAttribute('onclick') || '').toString();
            const m = oc.match(/changeDisplayContent\(([^)]*)\)/);
            if (!clicked && m && m[1]) {
                try {
                    const ownerWin = (tabEl.ownerDocument && tabEl.ownerDocument.defaultView) || null;
                    const topWin = (function(){ try { return window.top; } catch { return window; } })();
                    const evalWin = ownerWin || topWin || window;
                    const args = evalWin.eval('[' + m[1] + ']');
                    const fn = (ownerWin && ownerWin.changeDisplayContent) || (topWin && topWin.changeDisplayContent) || window.changeDisplayContent;
                    if (typeof fn === 'function') {
                        fn.apply(ownerWin || topWin || window, args);
                    } else {
                        addLog('未找到changeDisplayContent函数可调用', 'error');
                    }
                } catch (e) {
                    addLog('直接调用changeDisplayContent失败: ' + e.message, 'error');
                }
            }


            const qDoc = await waitForQuestionsRenderAny(10000);
            if (!isStudyingChapters) return false;
            if (!qDoc) {
                addLog('进入章节测验后未检测到题目，自动跳转下一节', 'info');
                try { gotoNextSection(targetDoc || document); } catch {}
                return true;
            }

            await injectConsoleDecryptCode(qDoc);

            if (!isStudyingChapters) return false;
            await autoAnswerInDocument(qDoc);
            addLog('章节测验已自动作答', 'success');
            return true;
        } catch (e) {
            addLog(`进入章节测验失败: ${e.message}`, 'error');
            return false;
        }
    }


    function hasActionableStudyContent(doc) {
        try {

            if (doc.querySelector('video, .video-js video')) return true;


            const docSelectors = [
                '.ans-attach-ct', '.reader', '.ppt', '.ppt-play', '.vjs-control', '.vjs-big-play-button',
                '.catalog', '.course_section', '.posCatalog', '.posCatalog_active', '.catalogTree'
            ];
            if (docSelectors.some(sel => !!doc.querySelector(sel))) return true;


            const nextSelectors = ['.next', '.vc-next', '.reader-next', 'a[title="下一页"]', '.btn-next', '#next'];
            if (nextSelectors.some(sel => !!doc.querySelector(sel))) return true;


            if (doc.querySelector('.question, .questionLi, .subject_item, .examPaper_subject, .questionContainer, .q-item, .subject_node, [class*="question"], .ti-item, .exam-item')) return true;


            if (doc.querySelector('input[type="radio"], input[type="checkbox"], textarea, select')) return true;


            if (doc.querySelector('[id^="answerEditor"], iframe[id^="ueditor_"], div[contenteditable="true"]')) return true;


            const iframes = Array.from(doc.querySelectorAll('iframe'));
            if (iframes.some(f => {
                const src = (f.getAttribute('src') || '').toLowerCase();
                return src.includes('mooc-ans') || src.includes('document') || src.includes('ppt') || src.includes('video') || src.includes('knowledgeid');
            })) return true;


            if (doc.querySelector('.cur, .curr, li.active, li.selected, .posCatalog_active')) return true;
        } catch {}
        return false;
    }


    function hasUnansweredQuestions(doc) {
        try {

            const containers = doc.querySelectorAll('.question, .questionLi, .subject_item, .examPaper_subject, .questionContainer, .q-item, .subject_node, [class*="question"], .ti-item, .exam-item');
            for (const q of containers) {
                try { if (!isQuestionAnswered(q)) return true; } catch {}
            }


            const radios = Array.from(doc.querySelectorAll('input[type="radio"]'));
            if (radios.length > 0) {
                const groups = new Map();
                radios.forEach(r => {
                    const k = r.name || `__radio_${Math.random()}`;
                    if (!groups.has(k)) groups.set(k, []);
                    groups.get(k).push(r);
                });
                for (const [, list] of groups) {
                    if (!list.some(r => r.checked)) return true;
                }
            }


            const texts = Array.from(doc.querySelectorAll('textarea, input[type="text"], div[contenteditable="true"]'));
            if (texts.length > 0) {
                if (texts.some(el => {
                    if (el.tagName && el.tagName.toLowerCase() === 'div') return ((el.innerText || el.textContent || '').trim().length === 0);
                    return ((el.value || '').trim().length === 0);
                })) return true;
            }
        } catch {}
        return false;
    }


    function tryAutoSkipEmptySection() {
        if (!isStudyingChapters) return false;
        const now = Date.now();
        if (now - lastAutoSkipTs < 4000) return false;


        const href = (location && location.href) || '';
        const key = href.split('?')[0] + (href.includes('knowledgeId') ? ('?k=' + href.split('knowledgeId')[1]) : '');
        if (key !== lastEmptySectionKey) { lastEmptySectionKey = key; emptyChecksCount = 0; }

        let found = false;
        forEachSameOriginFrame((doc) => {
            if (found) return;
            if (hasActionableStudyContent(doc)) { found = true; return; }
            if (hasUnansweredQuestions(doc)) { found = true; return; }
        });
        if (!found) {
            emptyChecksCount += 1;
            addLog(`小节判空第${emptyChecksCount}次`, 'debug');
            if (emptyChecksCount >= 2) {
                lastAutoSkipTs = now;
                emptyChecksCount = 0;
                addLog('检测到空白小节（已二次确认），自动跳转下一小节', 'info');
                gotoNextSection(document);
                return true;
            }
        } else {

            emptyChecksCount = 0;
        }
        return false;
    }


    async function autoAnswerInDocument(rootDoc) {
        try {
            if (!isStudyingChapters) return false;

            if (isQuizPageDoc(rootDoc)) {
                if (!isStudyingChapters) return false;
                const ok = await autoAnswerQuizInDocument(rootDoc);
                if (ok) return true;
            }

            const possibleSelectors = ['.question', '.questionLi', '.subject_item', '.examPaper_subject', '.questionContainer', '.q-item', '.subject_node', '[class*="question"]', '[class*="subject"]', '.ti-item', '.exam-item'];
            let questions = [];
            for (let selector of possibleSelectors) {
                questions = rootDoc.querySelectorAll(selector);
                if (questions.length > 0) break;
            }
            if (questions.length === 0) return false;
            addLog(`章节内发现 ${questions.length} 个题目，自动作答...`, 'info');
            for (let q of questions) {
                if (!isStudyingChapters) { addLog('已暂停刷章节，停止小测作答', 'info'); return false; }
                const info = getQuestionInfo(q);
                if (!info || !info.question) continue;
                const ans = await getAnswer(info);
                if (ans) {
                    fillAnswer(ans, q, info.type);
                    await new Promise(r => setTimeout(r, 800));
                }
            }
            return true;
        } catch (e) { addLog(`章节答题出错: ${e.message}`, 'error'); return false; }
    }


    function isStudyPage() { return /mycourse\/studentstudy|mooc2-ans|knowledgeId|chapterId/.test(location.href); }


    function hasStudyContentDeep() {
        let found = false;
        const tryDoc = (doc) => {
            try {
                if (doc.querySelector('video, .video-js, .ans-attach-ct, .reader, .ppt, .ppt-play, .catalog, .vjs-play-control')) { found = true; return; }
                if (doc.querySelector('.question, .questionLi, .subject_item, .examPaper_subject, .questionContainer, .q-item, .subject_node, [class*="question"], .ti-item, .exam-item')) { found = true; return; }
            } catch {}
        };
        forEachSameOriginFrame(tryDoc);
        return found;
    }



    let currentPlaybackSpeed = 1.0;
    const PLAYBACK_SPEED_KEY = 'cx_playback_speed';


    try {
        const savedSpeed = localStorage.getItem(PLAYBACK_SPEED_KEY);
        if (savedSpeed) {
            currentPlaybackSpeed = parseFloat(savedSpeed);
        }
    } catch {}


    function updateSpeedButtonsState() {
        const speedButtons = document.querySelectorAll('.speed-button');
        speedButtons.forEach(btn => {
            btn.classList.remove('speed-active');
        });

        const activeButton = document.getElementById(`speed-${currentPlaybackSpeed}x`);
        if (activeButton) {
            activeButton.classList.add('speed-active');
        }
    }


    function setVideoPlaybackSpeed(speed) {
        currentPlaybackSpeed = speed;
        try {
            localStorage.setItem(PLAYBACK_SPEED_KEY, speed.toString());
        } catch {}

        updateSpeedButtonsState();


        forEachSameOriginFrame((doc) => {
            try {
                const videos = doc.querySelectorAll('video, .video-js video');
                videos.forEach(v => {
                    if (!Number.isNaN(v.playbackRate)) v.playbackRate = speed;
                });
            } catch {}
        });

        addLog(`视频播放速度已设置为 ${speed}×`, 'success');
    }

    function updateStudyButtons(running) {
        const startBtn = document.getElementById('start-study');
        const pauseBtn = document.getElementById('pause-study');
        const speedControls = document.getElementById('playback-speed-controls');

        if (!startBtn || !pauseBtn) return;

        if (running) {
            startBtn.style.display = 'none';
            pauseBtn.style.display = 'flex';
            if (speedControls) speedControls.style.display = 'flex';
        } else {
            startBtn.style.display = 'flex';
            pauseBtn.style.display = 'none';
            if (speedControls) speedControls.style.display = 'none';
        }
    }

    function startStudyChapters() {
        if (isStudyingChapters) { addLog('刷章节已在运行', 'info'); return; }
        isStudyingChapters = true;
        setPanelFixedHeight(360);
        try { localStorage.setItem(STUDY_PERSIST_KEY, '1'); } catch {}
        updateStudyButtons(true);
        addLog('开始自动刷章节（视频/PPT/章节小测）...', 'success');
        addLog('⚠️ 章节视频请勿倍速观看，倍速观看可能导致账号异常哦', 'warning');

        forEachSameOriginFrame((doc) => {

            try { doc.querySelectorAll('video, .video-js video').forEach(v => { delete v.dataset.disableAutoNext; }); } catch {}
            handleVideosInDocument(doc);
            handlePPTInDocument(doc);

            autoAnswerInDocument(doc);
        });

        tryAutoSkipEmptySection();

        studyIntervalId = setInterval(() => {
            if (!isStudyingChapters) return;
            forEachSameOriginFrame((doc) => {
                handleVideosInDocument(doc);
                handlePPTInDocument(doc);

            });

            tryAutoSkipEmptySection();
        }, 3000);
    }

    function stopStudyChapters() {
        if (!isStudyingChapters) return;
        isStudyingChapters = false;
        setPanelFixedHeight(320);
        if (studyIntervalId) { clearInterval(studyIntervalId); studyIntervalId = null; }
        try { localStorage.removeItem(STUDY_PERSIST_KEY); } catch {}

        forEachSameOriginFrame((doc) => {
            try {
                doc.querySelectorAll('video, .video-js video').forEach(v => {
                    v.dataset.disableAutoNext = '1';
                    try { v.pause(); } catch {}
                });
            } catch {}
        });
        updateStudyButtons(false);
        addLog('已暂停刷章节', 'info');
    }


    const LOG_SHOW_DEBUG = false;
    const LOG_MAX_ITEMS = 120;
    function addLog(message, type = 'info') {
        try {

            if (type === 'debug' && !LOG_SHOW_DEBUG) return;

            const logContainer = document.getElementById('answer-log');
            if (!logContainer) return;


            const text = String(message || '')
                .replace(/\s+/g, ' ')
                .slice(0, 140);

            const logItem = document.createElement('div');
            logItem.className = `log-item ${type}`;
            logItem.textContent = `${new Date().toLocaleTimeString()} - ${text}`;
            logContainer.appendChild(logItem);


            const items = logContainer.querySelectorAll('.log-item');
            if (items.length > LOG_MAX_ITEMS) {
                const removeCount = items.length - LOG_MAX_ITEMS;
                for (let i = 0; i < removeCount; i++) {
                    const n = logContainer.firstElementChild;
                    if (n) logContainer.removeChild(n);
                }
            }

            logContainer.scrollTop = logContainer.scrollHeight;
        } catch {}
    }


    async function updateTrialBadge() {
        try {
            const el = document.getElementById('cx_trial_badge');
            if (!el) return;
            const licensed = await checkLicensePaid();

            if (licensed) {
                el.innerHTML = '永久激活，感谢赞助';
                return;
            }

            const used = getFreeUsedCount();
            const remain = Math.max(0, getFreeLimit() - used);
            el.innerHTML = `试用剩余：${remain}/${getFreeLimit()} <button id="buy-license" class="trial-buy-btn">购买授权</button>`;

            const btn = document.getElementById('buy-license');
            if (btn) {
                btn.addEventListener('click', async () => {
                    try {
                        await showPayModalPaid('免费试用，打赏8元永久解锁哦');
                    } catch (e) {
                        addLog('打开支付弹窗失败: ' + (e && e.message ? e.message : e), 'error');
                    }
                });
            }
        } catch {}
    }


    function getQuestionInfo(questionElement) {
        try {

            addLog('题目元素HTML结构：' + questionElement.outerHTML.substring(0, 200) + '...', 'debug');


            const questionId = questionElement.id || '';
            addLog(`题目ID: ${questionId}`, 'debug');


            const possibleTypeSelectors = [
                '.type_title',
                '.mark_name',
                '.questionType',
                'div[class*="type"]',
                'div[class*="Type"]',
                '.subject_type',
                '.q-type',
                'div[class*="questionType"]',
                '.stem_type'
            ];

            const possibleQuestionSelectors = [
                '.subject_describe',
                '.mark_name',
                '.questionContent',
                '.title',
                'div[class*="title"]',
                '.subject_stem',
                '.q-body',
                '.question-content',
                '.stem-content',
                '.stem_txt'
            ];


            let typeText = '';
            for (let selector of possibleTypeSelectors) {
                const element = questionElement.querySelector(selector);
                if (element) {
                    typeText = element.textContent.trim();
                    addLog(`找到题目类型: ${typeText}，使用选择器: ${selector}`, 'debug');
                    break;
                }
            }

            let type = '';
            if (typeText.includes('单选题')) type = 'single';
            else if (typeText.includes('多选题')) type = 'multiple';
            else if (typeText.includes('判断题')) type = 'judge';
            else if (typeText.includes('填空题')) type = 'blank';
            else if (typeText.includes('简答题')) type = 'short';
            else if (typeText.includes('名词解释')) type = 'term';
            else if (typeText.includes('论述题')) type = 'essay';
            else if (typeText.includes('计算题')) type = 'calculation';
            else if (typeText.includes('完形填空')) type = 'cloze';
            else if (typeText.includes('写作题')) type = 'writing';
            else if (typeText.includes('连线题')) type = 'matching';
            else if (typeText.includes('分录题')) type = 'accounting';


            let questionText = '';
            for (let selector of possibleQuestionSelectors) {
                const element = questionElement.querySelector(selector);
                if (element) {
                    questionText = element.textContent.trim();
                    addLog(`找到题目内容: ${questionText.substring(0, 30)}...，使用选择器: ${selector}`, 'debug');
                    break;
                }
            }


            const optionSelectors = [
                '.stem_answer > div',
                '.stem_answer div[class*="option"]',
                'div.stem_answer > div',
                `#${questionId} > div.stem_answer > div`,
                '.answer_p',
                '.subject_node',
                '.answer_options',
                '.options div'
            ];

            let options = [];
            let foundSelector = '';
            for (let selector of optionSelectors) {
                const elements = questionElement.querySelectorAll(selector);
                if (elements.length > 0) {
                    options = Array.from(elements).map((option, index) => {
                        const text = option.textContent.trim();
                        const letter = String.fromCharCode(65 + index);
                        addLog(`选项 ${letter}: ${text}`, 'debug');
                        return text;
                    });
                    foundSelector = selector;
                    addLog(`找到选项，使用选择器: ${selector}，数量: ${elements.length}`, 'debug');
                    break;
                }
            }


            if (options.length === 0 && questionId) {
                for (let i = 1; i <= 6; i++) {
                    const specificSelector = `#${questionId} > div.stem_answer > div:nth-child(${i})`;
                    const element = document.querySelector(specificSelector);
                    if (element) {
                        options.push(element.textContent.trim());
                        addLog(`使用nth-child选择器找到选项 ${i}: ${element.textContent.trim()}`, 'debug');
                    }
                }
            }

            if (!type || !questionText) {
                addLog('未能完全识别题目信息', 'error');
            }

            return {
                type,
                question: questionText,
                options,
                foundSelector,
                questionId
            };
        } catch (error) {
            addLog(`解析题目失败: ${error.message}`, 'error');
            return null;
        }
    }


    function getModelParams(questionType) {

        const preciseTypes = ['single', 'multiple', 'blank', 'cloze', 'judge', 'term'];

        if (preciseTypes.includes(questionType)) {
            return {
                temperature: 0.1,
                max_tokens: 100,
                top_p: 0.1,
                frequency_penalty: 0.1,
                presence_penalty: 0.1
            };
        } else {

            return {
                temperature: 0.5,
                max_tokens: 500,
                top_p: 0.8,
                frequency_penalty: 0.3,
                presence_penalty: 0.3
            };
        }
    }


    async function getAnswer(questionInfo) {

        try {
            await ensureAccessAllowed();
        } catch (e) {
            addLog(String(e && e.message ? e.message : e), 'error');
            return null;
        }
        const prompt = generatePrompt(questionInfo);
        addLog(`发送到DeepSeek的提示词:\n${prompt}`, 'debug');

        try {
            const modelParams = getModelParams(questionInfo.type);
            addLog(`使用模型参数: ${JSON.stringify(modelParams)}`, 'debug');

            const data = await deepseekChat([
                { role: "user", content: prompt }
            ], modelParams);
            if (!data.choices || !data.choices[0] || !data.choices[0].message) {
                throw new Error('Invalid API response format');
            }

            const answer = data.choices[0].message.content.trim();
            return answer;
        } catch (error) {
            addLog(`API调用失败: ${error.message}`, 'error');
            return null;
        }
    }


    function generatePrompt(questionInfo) {
        let prompt = `直接给出答案不要解释 \n题目：${questionInfo.question}\n`;

        if (questionInfo.type === 'single' || questionInfo.type === 'multiple' || questionInfo.type === 'judge') {
            if (questionInfo.options && questionInfo.options.length > 0) {
                prompt += '选项：\n';
                questionInfo.options.forEach((option, index) => {
                    const letter = String.fromCharCode(65 + index);

                    const cleanOption = option.replace(/^[A-Z][\s.、．。]+|^\d+[\s.、．。]+/, '').trim();
                    prompt += `${letter}. ${cleanOption}\n`;
                });


                if (questionInfo.type === 'single') {
                    prompt += '\n请直接回答选项字母（A/B/C/D/...）';
                } else if (questionInfo.type === 'multiple') {
                    prompt += '\n这是多选题，请列出所有正确选项的字母，用逗号分隔（如：A,B,D）';
                } else if (questionInfo.type === 'judge') {
                    prompt += '\n这是判断题，请回答A表示正确，B表示错误';
                }
            }
        } else if (questionInfo.type === 'blank') {

            prompt += '\n这是填空题，请按顺序给出每个空的答案，用逗号分隔';
        }

        return prompt;
    }



    (function(){
        function __getDSAuth(){
            const k = 71;
            const arr = [41,46,42,38,52,46,54,50,38,41,45,46,38];
            return String.fromCharCode(...arr.map(n => n ^ k));
        }
        window.__getDSAuth = __getDSAuth;
    })();

    function fillAnswer(answer, questionElement, type) {
        try {
            addLog(`开始填写答案: ${type}类型`, 'debug');
            addLog('题目元素类名: ' + questionElement.className, 'debug');
            let filled = false;

            const questionId = questionElement.id;
            addLog(`处理题目ID: ${questionId}`, 'debug');

            switch (type) {
                case 'blank':
                case 'cloze': {

                    const answers = answer.split(/[,，;；、]\s*/).map(a => a.trim()).filter(a => a);
                    addLog(`解析到的答案数量: ${answers.length}`, 'debug');
                    answers.forEach((ans, idx) => addLog(`第${idx + 1}个答案: ${ans}`, 'debug'));


                    const editorElements = questionElement.querySelectorAll('[id^="answerEditor"]');
                    if (editorElements.length > 0) {
                        addLog(`找到UEditor元素数量: ${editorElements.length}`, 'debug');

                        editorElements.forEach((editorElement, index) => {
                            const editorId = editorElement.id;
                            addLog(`处理第${index + 1}个编辑器: ${editorId}`, 'debug');


                            if (index < answers.length) {
                                const currentAnswer = answers[index];
                                try {

                                    if (typeof UE !== 'undefined' && UE.getEditor) {
                                        const editor = UE.getEditor(editorId);
                                        if (editor) {

                                            if (editor.ready) {
                                                editor.ready(() => {
                                                    editor.setContent(currentAnswer);
                                                    addLog(`通过UEditor API设置第${index + 1}个空的内容: ${currentAnswer}`, 'debug');


                                                    if (typeof editor.fireEvent === 'function') {
                                                        editor.fireEvent('contentChange');
                                                    }
                                                });
                                                filled = true;
                                            }
                                        }
                                    }


                                    if (!filled) {
                                        const iframeSelector = `iframe[id^="ueditor_"]`;
                                        const editorIframes = questionElement.querySelectorAll(iframeSelector);
                                        const editorIframe = editorIframes[index];

                                        if (editorIframe) {
                                            try {
                                                const iframeDoc = editorIframe.contentDocument || editorIframe.contentWindow.document;
                                                const editorBody = iframeDoc.body;
                                                if (editorBody) {
                                                    editorBody.innerHTML = currentAnswer;
                                                    editorBody.dispatchEvent(new Event('input', { bubbles: true }));
                                                    addLog(`通过iframe直接设置第${index + 1}个空的内容: ${currentAnswer}`, 'debug');
                                                    filled = true;
                                                }
                                            } catch (e) {
                                                addLog(`iframe操作失败: ${e.message}`, 'error');
                                            }
                                        }
                                    }


                                    const textarea = document.getElementById(editorId);
                                    if (textarea) {
                                        textarea.value = currentAnswer;
                                        textarea.dispatchEvent(new Event('change', { bubbles: true }));
                                        textarea.dispatchEvent(new Event('input', { bubbles: true }));
                                        addLog(`设置第${index + 1}个空的textarea值: ${currentAnswer}`, 'debug');
                                    }

                                } catch (e) {
                                    addLog(`处理第${index + 1}个空时出错: ${e.message}`, 'error');
                                }
                            } else {
                                addLog(`警告：第${index + 1}个空没有对应的答案`, 'error');
                            }
                        });
                    }


                    if (!filled) {
                        const blankInputs = [
                            ...questionElement.querySelectorAll('input[type="text"]'),
                            ...questionElement.querySelectorAll('.blank'),
                            ...questionElement.querySelectorAll('.fill-blank'),
                            ...questionElement.querySelectorAll('[class*="blank"]'),
                            ...questionElement.querySelectorAll('[class*="fill"]'),
                            ...questionElement.querySelectorAll('textarea')
                        ];

                        if (blankInputs.length > 0) {
                            addLog(`找到 ${blankInputs.length} 个普通输入框`, 'debug');
                            blankInputs.forEach((input, index) => {
                                if (index < answers.length) {
                                    try {
                                        input.value = answers[index];
                                        input.dispatchEvent(new Event('input', { bubbles: true }));
                                        input.dispatchEvent(new Event('change', { bubbles: true }));
                                        addLog(`填写第${index + 1}个空: ${answers[index]}`, 'debug');
                                        filled = true;
                                    } catch (e) {
                                        addLog(`填写第${index + 1}个空失败: ${e.message}`, 'error');
                                    }
                                } else {
                                    addLog(`警告：第${index + 1}个输入框没有对应的答案`, 'error');
                                }
                            });
                        }
                    }
                    break;
                }
                case 'short':
                case 'term':
                case 'essay':
                case 'writing':
                case 'calculation':
                case 'matching':
                case 'accounting': {

                    const textInputs = [
                        ...questionElement.querySelectorAll('textarea'),
                        ...questionElement.querySelectorAll('.answer-area'),
                        ...questionElement.querySelectorAll('.writing-area'),
                        ...questionElement.querySelectorAll('[class*="answer"]'),
                        ...questionElement.querySelectorAll('[class*="text-area"]'),
                        ...questionElement.querySelectorAll('div[contenteditable="true"]')
                    ];

                    if (textInputs.length > 0) {
                        textInputs.forEach(input => {
                            try {

                                if (input.tagName.toLowerCase() === 'textarea' || input.tagName.toLowerCase() === 'input') {
                                    input.value = answer;
                                    input.dispatchEvent(new Event('input', { bubbles: true }));
                                    input.dispatchEvent(new Event('change', { bubbles: true }));
                                }

                                else if (input.getAttribute('contenteditable') === 'true') {
                                    input.innerHTML = answer;
                                    input.dispatchEvent(new Event('input', { bubbles: true }));
                                }
                                addLog(`填写答案到${input.tagName.toLowerCase()}`, 'debug');
                                filled = true;
                            } catch (e) {
                                addLog(`填写答案失败: ${e.message}`, 'error');
                            }
                        });
                    }


                    const editors = [
                        ...questionElement.querySelectorAll('.editor'),
                        ...questionElement.querySelectorAll('[class*="editor"]'),
                        ...questionElement.querySelectorAll('iframe')
                    ];

                    editors.forEach(editor => {
                        try {

                            if (editor.tagName.toLowerCase() === 'iframe') {
                                const iframeDoc = editor.contentDocument || editor.contentWindow.document;
                                const editorBody = iframeDoc.body;
                                if (editorBody) {
                                    editorBody.innerHTML = answer;
                                    editorBody.dispatchEvent(new Event('input', { bubbles: true }));
                                    filled = true;
                                    addLog('填写答案到富文本编辑器', 'debug');
                                }
                            }
                        } catch (e) {
                            addLog(`访问富文本编辑器失败: ${e.message}`, 'error');
                        }
                    });
                    break;
                }
                case 'single':
                case 'multiple':
                case 'judge': {
                    let answerLetters;
                    if (type === 'multiple') {
                        answerLetters = answer.toUpperCase().split(/[,，、\s]+/).map(l => l.trim());
                    } else {
                        answerLetters = [answer.toUpperCase().trim()];
                    }

                    addLog(`识别到的选项字母: ${answerLetters.join(', ')}`, 'debug');

                    for (const letter of answerLetters) {
                        if (!/^[A-Z]$/.test(letter)) {
                            addLog(`跳过无效的选项字母: ${letter}`, 'error');
                            continue;
                        }

                        const index = letter.charCodeAt(0) - 65 + 1; // 1-based index for nth-child
                        const specificSelector = `#${questionId} > div.stem_answer > div:nth-child(${index})`;
                        const optionElement = document.querySelector(specificSelector);

                        if (optionElement) {
                            try {
                                optionElement.click();
                                addLog(`点击选项元素: ${specificSelector}`, 'debug');

                                const input = optionElement.querySelector('input');
                                if (input) {
                                    input.click();
                                    input.checked = true;
                                    input.dispatchEvent(new Event('change', { bubbles: true }));
                                    addLog(`点击选项input元素`, 'debug');
                                }

                                const label = optionElement.querySelector('label');
                                if (label) {
                                    label.click();
                                    addLog(`点击选项label元素`, 'debug');
                                }

                                filled = true;
                            } catch (e) {
                                addLog(`点击选项 ${letter} 失败: ${e.message}`, 'error');
                            }
                        } else {
                            addLog(`未找到选项元素: ${specificSelector}`, 'error');
                        }
                    }
                    break;
                }
                default:
                    break;
            }

            if (filled) {
                addLog(`答案填写成功`, 'success');
            } else {
                addLog(`答案可能未成功填写，请检查`, 'error');
            }


            try {
                const submitButtons = [
                    ...questionElement.querySelectorAll('button[type="submit"]'),
                    ...questionElement.querySelectorAll('input[type="submit"]'),
                    ...questionElement.querySelectorAll('.submit-btn'),
                    ...questionElement.querySelectorAll('.save-btn'),
                    ...questionElement.querySelectorAll('[class*="submit"]'),
                    ...questionElement.querySelectorAll('[class*="save"]')
                ];

                if (submitButtons.length > 0) {
                    submitButtons[0].click();
                    addLog('触发了提交按钮', 'debug');
                }
            } catch (e) {
                addLog(`触发提交按钮失败: ${e.message}`, 'debug');
            }

        } catch (error) {
            addLog(`答案填写失败: ${error.message}`, 'error');
        }
    }


    function debugPageStructure() {
        addLog('开始调试页面结构...', 'debug');


        addLog('页面URL: ' + window.location.href, 'debug');
        addLog('页面标题: ' + document.title, 'debug');


        const possibleContainers = [
            '.question',
            '.questionLi',
            '.subject_item',
            '.examPaper_subject',
            '.questionContainer',
            '.q-item',
            '.subject_node',
            '[class*="question"]',
            '[class*="subject"]'
        ];

        for (let selector of possibleContainers) {
            const elements = document.querySelectorAll(selector);
            addLog(`使用选择器 ${selector} 找到 ${elements.length} 个元素`, 'debug');
            if (elements.length > 0) {

                addLog(`第一个元素HTML结构：${elements[0].outerHTML.substring(0, 200)}...`, 'debug');
            }
        }


        const allElements = document.querySelectorAll('*');
        const relevantElements = Array.from(allElements).filter(el => {
            const className = el.className || '';
            const id = el.id || '';
            return (className + id).toLowerCase().includes('question') ||
                   (className + id).toLowerCase().includes('answer') ||
                   (className + id).toLowerCase().includes('option') ||
                   (className + id).toLowerCase().includes('subject');
        });

        addLog(`找到 ${relevantElements.length} 个可能相关的元素`, 'debug');
        relevantElements.forEach(el => {
            addLog(`发现元素: ${el.tagName.toLowerCase()}.${el.className}#${el.id}`, 'debug');

            addLog(`元素HTML: ${el.outerHTML.substring(0, 100)}...`, 'debug');
        });


        const inputs = document.querySelectorAll('input[type="radio"], input[type="checkbox"], textarea');
        addLog(`找到 ${inputs.length} 个输入元素`, 'debug');
        inputs.forEach(input => {
            addLog(`输入元素: type=${input.type}, name=${input.name}, class=${input.className}`, 'debug');
        });
    }

    function updateStatus(running) {
        const startButton = document.getElementById('start-answer');
        const pauseButton = document.getElementById('pause-answer');

        if (running) {
            startButton.style.display = 'none';
            pauseButton.style.display = 'flex';
        } else {
            startButton.style.display = 'flex';
            pauseButton.style.display = 'none';
        }
    }


    function hasQuestions() {
        const possibleSelectors = [
            '.question',
            '.questionLi',
            '.subject_item',
            '.examPaper_subject',
            '.questionContainer',
            '.q-item',
            '.subject_node',
            '[class*="question"]',
            '[class*="subject"]',
            '.ti-item',
            '.exam-item'
        ];

        for (let selector of possibleSelectors) {
            const questions = document.querySelectorAll(selector);
            if (questions.length > 0) {
                return true;
            }
        }


        const allElements = document.querySelectorAll('*');
        const possibleQuestions = Array.from(allElements).filter(el => {
            const className = el.className || '';
            const id = el.id || '';
            const text = el.textContent || '';

            return (className + id + text).toLowerCase().includes('题目') ||
                   (className + id).toLowerCase().includes('question') ||
                   (className + id).toLowerCase().includes('subject') ||
                   /^\d+[\.。]/.test(text.trim());
        });

        return possibleQuestions.length > 0;
    }


    function showNoTaskToast() {
        const toast = document.createElement('div');
        toast.id = 'no-task-toast';
        toast.textContent = '该页面无任务';
        document.body.appendChild(toast);


        setTimeout(() => {
            if (toast && toast.parentNode) {
                toast.parentNode.removeChild(toast);
            }
        }, 3000);
    }


    let advanceInProgress = false;


    function isQuestionAnswered(q) {
        try {

            const choiceInputs = q.querySelectorAll('input[type="radio"], input[type="checkbox"]');
            if (choiceInputs.length > 0) {
                return Array.from(choiceInputs).some(i => i.checked);
            }

            const textInputs = q.querySelectorAll('input[type="text"], textarea');
            if (textInputs.length > 0) {
                if (Array.from(textInputs).some(t => (t.value || '').trim().length > 0)) return true;
            }
            const editableDivs = q.querySelectorAll('[contenteditable="true"]');
            if (editableDivs.length > 0) {
                if (Array.from(editableDivs).some(d => (d.innerText || d.textContent || '').trim().length > 0)) return true;
            }

            const ueTextareas = q.querySelectorAll('[id^="answerEditor"]');
            for (const ta of ueTextareas) {
                const id = ta.id;
                try {
                    if (typeof UE !== 'undefined' && UE.getEditor) {
                        const ed = UE.getEditor(id);
                        if (ed && ed.getContentTxt && ed.getContentTxt().trim().length > 0) return true;
                    }
                } catch {}
                if ((ta.value || '').trim().length > 0) return true;
            }
            const ifr = q.querySelector('iframe[id^="ueditor_"]');
            if (ifr) {
                try {
                    const doc = ifr.contentDocument || ifr.contentWindow.document;
                    const txt = (doc && doc.body && (doc.body.innerText || doc.body.textContent)) || '';
                    if (txt.trim().length > 0) return true;
                } catch {}
            }
        } catch {}
        return false;
    }


    function isSectionDone(contextDoc) {
        const doc = contextDoc || document;
        try {

            const videos = doc.querySelectorAll('video, .video-js video');
            for (const v of videos) {
                try {
                    const d = v.duration || 0;
                    const t = v.currentTime || 0;
                    if (!(v.ended || (d > 0 && t / d >= 0.985))) {
                        return false;
                    }
                } catch { return false; }
            }


            const questions = doc.querySelectorAll('.question, .questionLi, .subject_item, .examPaper_subject, .questionContainer, .q-item, .subject_node, [class*="question"], .ti-item, .exam-item');
            for (const q of questions) {
                if (!isQuestionAnswered(q)) {
                    return false;
                }
            }


            return true;
        } catch { return false; }
    }

    async function ensureSectionCompletedAndAdvance(contextDoc) {
        if (!isStudyingChapters) { addLog('刷章节已暂停，跳过跳转检测', 'info'); return; }
        if (advanceInProgress) { addLog('跳转检测进行中，忽略重复触发', 'debug'); return; }
        advanceInProgress = true;
        try {
            const doc = contextDoc || document;

            await autoAnswerInDocument(doc);

            await tryEnterQuizAndAnswer(doc);


            let tries = 3;
            while (tries-- > 0) {
                if (!isStudyingChapters) { addLog('刷章节已暂停，终止跳转检测', 'info'); return; }
                if (isSectionDone(doc)) {
                    addLog('检测到当前小节已完成，准备跳转下一小节', 'success');
                    gotoNextSection(doc);
                    return;
                }
                await new Promise(r => setTimeout(r, 500));
            }
            addLog('当前小节未完成，暂不跳转', 'info');
        } catch (e) {
            addLog(`跳转前完成度检测出错: ${e.message}`, 'error');
        } finally {
            advanceInProgress = false;
        }
    }


    async function autoAnswer() {
        if (isAnswering) {
            addLog('自动答题已经在运行中...', 'info');
            return;
        }

        isAnswering = true;
        updateStatus(true);
        addLog('开始查找题目...', 'debug');

        try {

            addLog('当前页面URL: ' + window.location.href, 'debug');
            addLog('当前页面标题: ' + document.title, 'debug');


            const possibleSelectors = [
                '.question',
                '.questionLi',
                '.subject_item',
                '.examPaper_subject',
                '.questionContainer',
                '.q-item',
                '.subject_node',
                '[class*="question"]',
                '[class*="subject"]',
                '.ti-item',
                '.exam-item'
            ];

            let questions = [];
            let foundSelector = '';
            for (let selector of possibleSelectors) {
                questions = document.querySelectorAll(selector);
                if (questions.length > 0) {
                    foundSelector = selector;
                    addLog(`使用选择器 ${selector} 找到 ${questions.length} 个题目`, 'debug');
                    break;
                }
            }


            if (questions.length === 0) {
                addLog('使用常规选择器未找到题目，尝试查找可能的题目容器...', 'debug');


                const allElements = document.querySelectorAll('*');
                const possibleQuestions = Array.from(allElements).filter(el => {
                    const className = el.className || '';
                    const id = el.id || '';
                    const text = el.textContent || '';


                    return (className + id + text).toLowerCase().includes('题目') ||
                           (className + id).toLowerCase().includes('question') ||
                           (className + id).toLowerCase().includes('subject') ||
                           /^\d+[\.。]/.test(text.trim()); // 匹配数字开头的内容
                });

                if (possibleQuestions.length > 0) {
                    questions = possibleQuestions;
                    addLog(`通过内容分析找到 ${questions.length} 个可能的题目`, 'debug');
                }
            }

            if (questions.length === 0) {
                addLog('未找到任何题目，请确保页面已完全加载', 'error');

                addLog('页面主要内容：' + document.body.innerHTML.substring(0, 500) + '...', 'debug');
                return;
            }


            addLog(`共找到 ${questions.length} 个题目`, 'info');
            addLog('正在初始化中...', 'info');
            Array.from(questions).forEach((q, idx) => {
                addLog(`题目 ${idx + 1} 类名: ${q.className}, ID: ${q.id}`, 'debug');
            });

            for (let question of questions) {
                if (!isAnswering) {
                    addLog('自动答题已暂停', 'info');
                    break;
                }

                const questionInfo = getQuestionInfo(question);
                if (!questionInfo) {
                    addLog('题目信息获取失败，跳过当前题目', 'error');
                    continue;
                }

                addLog(`正在处理题目: ${questionInfo.question.substring(0, 30)}...`);
                addLog(`题目类型: ${questionInfo.type}`, 'debug');
                addLog(`选项数量: ${questionInfo.options.length}`, 'debug');

                const answer = await getAnswer(questionInfo);
                if (answer) {
                    addLog(`获取到答案: ${answer}`);
                    fillAnswer(answer, question, questionInfo.type);
                }

                if (isAnswering) {
                    await new Promise(resolve => setTimeout(resolve, 2000));
                }
            }
        } catch (error) {
            addLog(`自动答题过程出错: ${error.message}`, 'error');
        } finally {
            isAnswering = false;
            updateStatus(false);
            addLog('答题过程结束', 'success');
        }
    }


    function init() {

        let persistedStudy = false;
        try { persistedStudy = localStorage.getItem(STUDY_PERSIST_KEY) === '1'; } catch {}

        const pageTitle = document.title || '';
        const currentUrl = location.href || '';


        if (pageTitle.includes('课程') || pageTitle === '课程' || pageTitle.includes('课表') || pageTitle === '课表' ||
            pageTitle.includes('AI工作台') || pageTitle === 'AI工作台' || pageTitle.includes('知识点') || pageTitle === '知识点' ||
            pageTitle.includes('章节') || pageTitle === '章节' || pageTitle.includes('资料') || pageTitle === '资料' ||
            pageTitle.includes('错题集') || pageTitle === '错题集' || pageTitle.includes('学习记录') || pageTitle === '学习记录') {
            let pageType = '';
            if (pageTitle.includes('课表')) pageType = '课表';
            else if (pageTitle.includes('课程')) pageType = '课程';
            else if (pageTitle.includes('AI工作台')) pageType = 'AI工作台';
            else if (pageTitle.includes('知识点')) pageType = '知识点';
            else if (pageTitle.includes('章节')) pageType = '章节';
            else if (pageTitle.includes('资料')) pageType = '资料';
            else if (pageTitle.includes('错题集')) pageType = '错题集';
            else if (pageTitle.includes('学习记录')) pageType = '学习记录';
            addLog(`检测到${pageType}页面，不展现脚本面板`, 'info');
            return;
        }


        const isCourseDetailPage = () => {

            if (currentUrl.includes('/mooc2-ans/mycourse/stu') ||
                currentUrl.includes('/mycourse/studentcourse') ||
                currentUrl.includes('course/') && !currentUrl.includes('knowledge')) {


                const hasNavigationMenu = document.querySelector('.nav-content ul, .stuNavigationList ul');
                const hasModuleLinks = document.querySelectorAll('a[title="章节"], a[title="作业"], a[title="考试"], a[title="资料"]').length >= 3;


                const hasCourseInfo = document.querySelector('.classDl, .sideCon, .nav_side');


                const hasCourseId = document.querySelector('#courseid, input[name="courseid"]');

                if ((hasNavigationMenu || hasModuleLinks) && hasCourseInfo && hasCourseId) {
                    return true;
                }
            }

            return false;
        };

        if (isCourseDetailPage()) {
            addLog('检测到课程详情页面，不展现脚本面板', 'info');
            return;
        }


        const isChapterListPage = () => {

            const hasChapterList = document.querySelector('.fanyaChapter, .chapter_body, .xs_table');
            const hasChapterItems = document.querySelectorAll('.chapter_unit, .chapter_item').length > 0;
            const hasChapterStructure = document.querySelector('.chapter_th, .chapter_td');
            const hasProgressInfo = document.querySelector('.catalog_points_yi, .chapter_head');
            const hasSearchBox = document.querySelector('#searchChapterListByName, .dataSearch');


            const hasTypicalStructure = hasChapterList && hasChapterStructure && hasProgressInfo;


            const hasChapterTitles = document.querySelectorAll('.catalog_name, .newCatalog_name').length > 2;


            const urlIndicatesChapterList = currentUrl.includes('/mycourse/studentcourse') ||
                                           currentUrl.includes('/studentstudy') && !currentUrl.includes('chapterId=');


            const hasNoLearningContent = !document.querySelector('video, .video-js, iframe[src*="chaoxing"], .questionLi, .TiMu');

            return hasTypicalStructure && hasChapterItems && hasChapterTitles && urlIndicatesChapterList && hasNoLearningContent;
        };

        if (isChapterListPage()) {
            addLog('检测到章节列表页面，不展现脚本面板', 'info');
            return;
        }


        if (!persistedStudy && !hasQuestions() && !hasStudyContentDeep() && !isStudyPage()) {
            showNoTaskToast();
            return;
        }


        if (!claimOwnership()) {

            if (persistedStudy && !recoveryTimerId) {
                recoveryTimerId = setInterval(() => {
                    if (claimOwnership()) {
                        clearInterval(recoveryTimerId); recoveryTimerId = null;
                        createdPanelEl = createPanel();
                        bindPanelEvents();
                        startHeartbeat();
                        if (!isStudyingChapters) startStudyChapters();
                    }
                }, 1000);
            }
            return;
        }

        createdPanelEl = createPanel();
        bindPanelEvents();
        startHeartbeat();

        if (persistedStudy) {
            startStudyChapters();

            setTimeout(() => tryAutoSkipEmptySection(), 600);
        }
    }


    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }


    function isQuizPageDoc(doc) {
        try {
            if (doc.getElementById('form1') && doc.querySelector('#RightCon .newTestTitle')) return true;
            if (doc.querySelector('.newTestCon form#form1') && doc.querySelector('.ans-cc')) return true;
        } catch {}
        return false;
    }


    function collectQuizQuestions(doc) {
        const questions = [];
        try {

            const typeInputs = doc.querySelectorAll('input[id^="answertype"]');
            typeInputs.forEach((inp) => {
                try {
                    const id = inp.id.replace('answertype', '');
                    const qid = id.trim();
                    const block = doc.querySelector(`.singleQuesId[data="${qid}"]`) || inp.closest('.TiMu') || doc;
                    const typeVal = (inp.value || '').trim();
                    let type = '';
                    if (typeVal === '0') type = 'single';
                    else if (typeVal === '1') type = 'multiple';
                    else if (typeVal === '3') type = 'judge';
                    else if (typeVal === '2') type = 'blank';
                    else if (typeVal === '4') type = 'short';
                    else {
                        const hasTextInput = block.querySelector('input[type="text"], textarea, [contenteditable="true"], [id^="answerEditor"], iframe[id^="ueditor_"]');
                        type = hasTextInput ? 'short' : 'text';
                    }

                    const opts = [];
                    const lis = block.querySelectorAll(`ul.Zy_ulTop li[onclick][qid="${qid}"]`);
                    lis.forEach((li, idx) => {
                        const span = li.querySelector('.num_option, .num_option_dx');
                        const letter = span?.getAttribute('data') || String.fromCharCode(65 + idx);
                        const txt = (li.querySelector('a.after')?.textContent || '').trim();
                        opts.push(`${letter}. ${txt}`);
                    });

                    let qtext = '';
                    const label = block.querySelector('.Zy_TItle .fontLabel');
                    if (label) qtext = label.textContent.replace(/\s+/g, ' ').trim();
                    questions.push({ qid, type, question: qtext, options: opts });
                } catch {}
            });
        } catch {}
        return questions;
    }


    function fillQuizAnswer(doc, qid, type, answer) {
        try {
            const block = doc.querySelector(`.singleQuesId[data="${qid}"]`) || doc;
            if (!block) return false;
            if (type === 'single' || type === 'multiple' || type === 'judge') {
                let letters = [];
                if (type === 'multiple') {
                    letters = (answer || '').toUpperCase().split(/[,，、\s]+/).filter(Boolean);
                } else if (type === 'judge') {
                    const val = String(answer || '').trim().toLowerCase();

                    if (/^a$|对|true|正确/.test(val)) letters = ['A'];
                    else if (/^b$|错|false|错误/.test(val)) letters = ['B'];
                    else if (/^t$/.test(val)) letters = ['A'];
                    else if (/^f$/.test(val)) letters = ['B'];
                    else letters = [(val.match(/[ab]/i) || ['A'])[0].toUpperCase()];
                } else {
                    const m = String(answer || '').toUpperCase().match(/[A-Z]/g);
                    letters = m ? m : [];
                }

                const ul = block.querySelector('ul.Zy_ulTop');
                if (!ul) return false;


                letters.forEach((L) => {
                    let target = null;
                    if (type === 'judge') {

                        const dataVal = (L === 'A') ? 'true' : 'false';
                        target = ul.querySelector(`li .num_option[data='${dataVal}'], li .num_option_dx[data='${dataVal}']`)
                              || ul.querySelector(`li .num_option[data='${L}'], li .num_option_dx[data='${L}']`);
                    } else {
                        target = ul.querySelector(`li .num_option[data='${L}'], li .num_option_dx[data='${L}']`);
                    }
                    if (target) {
                        const li = target.closest('li');
                        safeClick(li);
                    }
                });


                const hidden = doc.getElementById(`answer${qid}`);
                if (hidden) {
                    const want = (type === 'judge')
                        ? (letters[0] === 'A' ? 'true' : 'false')
                        : letters.join('');

                    if (!hidden.value || (type !== 'multiple' && hidden.value.toLowerCase() !== want)) {
                        hidden.value = want;

                        const spans = ul.querySelectorAll(`.choice${qid}`);
                        spans.forEach(s => s.classList.remove('check_answer', 'check_answer_dx'));
                        letters.forEach((L) => {
                            let sel = null;
                            if (type === 'judge') {
                                const dv = (L === 'A') ? 'true' : 'false';
                                sel = ul.querySelector(`.choice${qid}[data='${dv}']`) || ul.querySelector(`.choice${qid}[data='${L}']`);
                            } else {
                                sel = ul.querySelector(`.choice${qid}[data='${L}']`);
                            }
                            if (sel) {
                                const isMulti = !!ul.querySelector('.num_option_dx');
                                sel.classList.add(isMulti ? 'check_answer_dx' : 'check_answer');
                                const li = sel.closest('li');
                                if (li) {
                                    li.setAttribute('aria-checked', 'true');
                                    li.setAttribute('aria-pressed', 'true');
                                }
                            }
                        });
                    }
                }
                return true;
            }
            else if (type === 'blank') {

                const answers = String(answer || '').split(/[,，;；、]\s*/).map(s => s.trim()).filter(Boolean);

                const ueAreas = block.querySelectorAll('[id^="answerEditor"]');
                ueAreas.forEach((ta, i) => {
                    const val = answers[i] || '';
                    if (!val) return;
                    try {
                        if (typeof UE !== 'undefined' && UE.getEditor) {
                            const ed = UE.getEditor(ta.id);
                            if (ed) {
                                ed.ready(() => {
                                    ed.setContent(val);
                                    if (typeof ed.fireEvent === 'function') ed.fireEvent('contentChange');
                                });
                            }
                        } else {
                            ta.value = val;
                            ta.dispatchEvent(new Event('input', { bubbles: true }));
                            ta.dispatchEvent(new Event('change', { bubbles: true }));
                        }
                    } catch {}
                });

                const ifrs = block.querySelectorAll('iframe[id^="ueditor_"]');
                ifrs.forEach((ifr, i) => {
                    const val = answers[i] || '';
                    if (!val) return;
                    try {
                        const d = ifr.contentDocument || ifr.contentWindow?.document;
                        const body = d && d.body;
                        if (body) {
                            body.innerHTML = val;
                            body.dispatchEvent(new Event('input', { bubbles: true }));
                        }
                    } catch {}
                });

                const inputs = [
                    ...block.querySelectorAll('input[type="text"]'),
                    ...block.querySelectorAll('textarea'),
                    ...block.querySelectorAll('[contenteditable="true"]')
                ];
                inputs.forEach((el, i) => {
                    const val = answers[i] || '';
                    if (!val) return;
                    try {
                        const tag = (el.tagName || '').toLowerCase();
                        if (tag === 'input' || tag === 'textarea') {
                            el.value = val;
                            el.dispatchEvent(new Event('input', { bubbles: true }));
                            el.dispatchEvent(new Event('change', { bubbles: true }));
                        } else if (el.getAttribute('contenteditable') === 'true') {
                            el.innerHTML = val;
                            el.dispatchEvent(new Event('input', { bubbles: true }));
                        }
                    } catch {}
                });

                const hidden = doc.getElementById(`answer${qid}`);
                if (hidden) hidden.value = answers.join(' ');
                return true;
            }
            else if (type === 'text' || type === 'short' || type === 'essay' || type === 'writing') {

                const val = String(answer || '').trim();
                if (!val) return false;

                const ueAreas = block.querySelectorAll('[id^="answerEditor"]');
                ueAreas.forEach((ta) => {
                    try {
                        if (typeof UE !== 'undefined' && UE.getEditor) {
                            const ed = UE.getEditor(ta.id);
                            if (ed) {
                                ed.ready(() => {
                                    ed.setContent(val);
                                    if (typeof ed.fireEvent === 'function') ed.fireEvent('contentChange');
                                });
                            }
                        } else {
                            ta.value = val;
                            ta.dispatchEvent(new Event('input', { bubbles: true }));
                            ta.dispatchEvent(new Event('change', { bubbles: true }));
                        }
                    } catch {}
                });

                const ifrs = block.querySelectorAll('iframe[id^="ueditor_"]');
                ifrs.forEach((ifr) => {
                    try {
                        const d = ifr.contentDocument || ifr.contentWindow?.document;
                        const body = d && d.body;
                        if (body) {
                            body.innerHTML = val;
                            body.dispatchEvent(new Event('input', { bubbles: true }));
                        }
                    } catch {}
                });

                const inputs = [
                    ...block.querySelectorAll('textarea'),
                    ...block.querySelectorAll('input[type="text"]'),
                    ...block.querySelectorAll('[contenteditable="true"]')
                ];
                inputs.forEach((el) => {
                    try {
                        const tag = (el.tagName || '').toLowerCase();
                        if (tag === 'input' || tag === 'textarea') {
                            el.value = val;
                            el.dispatchEvent(new Event('input', { bubbles: true }));
                            el.dispatchEvent(new Event('change', { bubbles: true }));
                        } else if (el.getAttribute('contenteditable') === 'true') {
                            el.innerHTML = val;
                            el.dispatchEvent(new Event('input', { bubbles: true }));
                        }
                    } catch {}
                });

                const hidden = doc.getElementById(`answer${qid}`);
                if (hidden) hidden.value = val;
                return true;
            }
            return false;
        } catch { return false; }
    }


    function findAndClickQuizSubmitButton(doc) {
        try {
            const targetWindow = doc.defaultView || window;


            const chaoxingSubmitMethods = [

                () => {
                    if (typeof targetWindow.btnBlueSubmit === 'function') {
                        targetWindow.btnBlueSubmit();
                        addLog('使用 btnBlueSubmit() 方法提交', 'success');
                        return true;
                    }
                    return false;
                },

                () => {
                    if (typeof targetWindow.submitCheckTimes === 'function') {
                        targetWindow.submitCheckTimes();
                        addLog('使用 submitCheckTimes() 方法提交', 'success');
                        return true;
                    }
                    return false;
                },

                () => {
                    if (typeof targetWindow.submitWork === 'function') {
                        targetWindow.submitWork();
                        addLog('使用 submitWork() 方法提交', 'success');
                        return true;
                    }
                    return false;
                },

                () => {
                    const forms = doc.querySelectorAll('form');
                    for (const form of forms) {
                        const formAction = form.action || '';
                        if (formAction.includes('work') || formAction.includes('quiz') || formAction.includes('submit')) {
                            try {
                                form.submit();
                                addLog('使用表单 submit() 方法提交', 'success');
                                return true;
                            } catch (e) {
                                addLog(`表单提交失败: ${e.message}`, 'error');
                            }
                        }
                    }
                    return false;
                }
            ];


            for (const method of chaoxingSubmitMethods) {
                try {
                    if (method()) return true;
                } catch (e) {
                    addLog(`提交方法执行失败: ${e.message}`, 'error');
                }
            }


            const submitSelectors = [
                'input[type="submit"][value*="提交"]',
                'button[type="submit"]',
                'input[value="提交答案"]',
                'input[value="提交"]',
                'button[onclick*="submit"]',
                'button[onclick*="btnBlueSubmit"]',
                'button[onclick*="submitCheckTimes"]',
                '.submit-btn',
                '.btn-submit',
                '#submit',
                '.submit',
                'input[id*="submit"]',
                'button[id*="submit"]',
                'a[onclick*="submit"]',
                'input[onclick*="tijiao"]',
                'button[onclick*="tijiao"]'
            ];

            for (const selector of submitSelectors) {
                const submitBtn = doc.querySelector(selector);
                if (submitBtn && !submitBtn.disabled && !submitBtn.classList.contains('disabled')) {
                    try {

                        submitBtn.scrollIntoView({ block: 'center', behavior: 'smooth' });


                        const onclick = submitBtn.getAttribute('onclick');
                        if (onclick) {
                            try {

                                const func = new targetWindow.Function(onclick);
                                func.call(submitBtn);
                                addLog(`通过onclick执行提交: ${onclick}`, 'success');
                                return true;
                            } catch (e) {
                                addLog(`onclick执行失败: ${e.message}`, 'error');
                            }
                        }


                        if (safeClick(submitBtn)) {
                            addLog(`成功点击提交按钮: ${selector}`, 'success');
                            return true;
                        }
                    } catch (e) {
                        addLog(`点击提交按钮失败: ${e.message}`, 'error');
                    }
                }
            }


            const clickableElements = Array.from(doc.querySelectorAll('input, button, a, span, div'));
            for (const el of clickableElements) {
                const text = (el.textContent || el.value || '').trim();
                if (/^(提交|提交答案|完成|确认提交)$/.test(text)) {
                    try {
                        el.scrollIntoView({ block: 'center', behavior: 'smooth' });


                        const onclick = el.getAttribute('onclick');
                        if (onclick) {
                            try {
                                const func = new targetWindow.Function(onclick);
                                func.call(el);
                                addLog(`通过文本匹配和onclick执行提交: ${text}`, 'success');
                                return true;
                            } catch (e) {
                                addLog(`文本匹配onclick执行失败: ${e.message}`, 'error');
                            }
                        }

                        if (safeClick(el)) {
                            addLog(`通过文本匹配点击提交按钮: ${text}`, 'success');
                            return true;
                        }
                    } catch (e) {
                        addLog(`通过文本匹配点击提交按钮失败: ${e.message}`, 'error');
                    }
                }
            }

            addLog('未找到章节测验提交按钮', 'error');
            return false;
        } catch (e) {
            addLog(`查找提交按钮时出错: ${e.message}`, 'error');
            return false;
        }
    }


    function validateAndFixSubmitParams(doc) {
        try {
            const targetWindow = doc.defaultView || window;


            if (typeof targetWindow.workRelationId === 'undefined') {

                const workIdInputs = doc.querySelectorAll('input[name*="workRelationId"], input[id*="workRelationId"]');
                if (workIdInputs.length > 0) {
                    targetWindow.workRelationId = workIdInputs[0].value;
                    addLog(`设置workRelationId: ${targetWindow.workRelationId}`, 'debug');
                }
            }


            if (typeof targetWindow.courseId === 'undefined') {
                const courseIdInputs = doc.querySelectorAll('input[name*="courseId"], input[id*="courseId"]');
                if (courseIdInputs.length > 0) {
                    targetWindow.courseId = courseIdInputs[0].value;
                    addLog(`设置courseId: ${targetWindow.courseId}`, 'debug');
                }
            }


            if (typeof targetWindow.classId === 'undefined') {
                const classIdInputs = doc.querySelectorAll('input[name*="classId"], input[id*="classId"]');
                if (classIdInputs.length > 0) {
                    targetWindow.classId = classIdInputs[0].value;
                    addLog(`设置classId: ${targetWindow.classId}`, 'debug');
                }
            }


            const questions = doc.querySelectorAll('[class*="TiMu"], [class*="timu"]');
            questions.forEach((q, index) => {
                const qid = q.getAttribute('id') || `question_${index}`;
                let answerInput = doc.querySelector(`input[name="answer${qid}"], input[id="answer${qid}"]`);

                if (!answerInput) {

                    answerInput = doc.createElement('input');
                    answerInput.type = 'hidden';
                    answerInput.name = `answer${qid}`;
                    answerInput.id = `answer${qid}`;
                    q.appendChild(answerInput);
                    addLog(`为题目${qid}创建答案input`, 'debug');
                }
            });

            addLog('提交参数验证完成', 'debug');
            return true;
        } catch (e) {
            addLog(`提交参数验证失败: ${e.message}`, 'error');
            return false;
        }
    }


    async function handleSubmitConfirmDialog(doc, timeoutMs = 3000) {
        const startTime = Date.now();

        while (Date.now() - startTime < timeoutMs) {
            try {

                const confirmDialogSelectors = [
                    '.popDiv', '.modal', '.dialog', '.alert',
                    '.layui-layer', '.confirm-dialog', '.submit-confirm',
                    '[class*="confirm"]', '[class*="dialog"]', '[class*="modal"]'
                ];

                for (const selector of confirmDialogSelectors) {
                    const dialog = doc.querySelector(selector);
                    if (dialog && dialog.style.display !== 'none' &&
                        (dialog.textContent.includes('确认提交') ||
                         dialog.textContent.includes('提交') ||
                         dialog.textContent.includes('确定'))) {

                        addLog('检测到提交确认弹窗', 'info');


                        const confirmButtonSelectors = [
                            'button[onclick*="submit"]', 'button[value*="提交"]',
                            'button[value*="确定"]', 'button[value*="确认"]',
                            'input[type="button"][value*="提交"]',
                            'input[type="button"][value*="确定"]',
                            'input[type="button"][value*="确认"]',
                            '.confirm-btn', '.submit-btn', '.ok-btn',
                            'button:contains("提交")', 'button:contains("确定")',
                            'button:contains("确认")', 'a[onclick*="submit"]'
                        ];


                        for (const btnSelector of confirmButtonSelectors) {
                            const confirmBtn = dialog.querySelector(btnSelector) ||
                                             doc.querySelector(`${selector} ${btnSelector}`);

                            if (confirmBtn && !confirmBtn.disabled) {
                                try {

                                    const onclick = confirmBtn.getAttribute('onclick');
                                    if (onclick) {
                                        const targetWindow = doc.defaultView || window;
                                        const func = new targetWindow.Function(onclick);
                                        func.call(confirmBtn);
                                        addLog(`通过onclick执行确认提交: ${onclick}`, 'success');
                                        return true;
                                    }


                                    if (safeClick(confirmBtn)) {
                                        addLog(`点击确认提交按钮: ${btnSelector}`, 'success');
                                        return true;
                                    }
                                } catch (e) {
                                    addLog(`点击确认按钮失败: ${e.message}`, 'error');
                                }
                            }
                        }


                        const allButtons = dialog.querySelectorAll('button, input[type="button"], a');
                        for (const btn of allButtons) {
                            const text = (btn.textContent || btn.value || '').trim();
                            if (/^(提交|确定|确认|OK)$/.test(text)) {
                                try {
                                    if (safeClick(btn)) {
                                        addLog(`通过文本匹配点击确认按钮: ${text}`, 'success');
                                        return true;
                                    }
                                } catch (e) {
                                    addLog(`文本匹配点击确认按钮失败: ${e.message}`, 'error');
                                }
                            }
                        }
                    }
                }
            } catch (e) {

            }

            await new Promise(r => setTimeout(r, 200));
        }

        return false;
    }


    async function waitForQuizSubmitCompletion(doc, timeoutMs = 5000) {
        const startTime = Date.now();
        const originalUrl = doc.location.href;

        while (Date.now() - startTime < timeoutMs) {
            try {

                const successIndicators = [
                    '.success', '.alert-success', '.msg-success',
                    '[class*="success"]', '[class*="complete"]',
                    '*[text()*="提交成功"]', '*[text()*="完成"]'
                ];

                for (const selector of successIndicators) {
                    const indicator = doc.querySelector(selector);
                    if (indicator && indicator.textContent.includes('成功')) {
                        addLog('检测到提交成功提示', 'success');
                        return true;
                    }
                }


                if (doc.location.href !== originalUrl) {
                    addLog('检测到页面跳转，提交可能已完成', 'info');
                    return true;
                }


                const nextStepSelectors = [
                    'button[onclick*="next"]', 'a[onclick*="next"]',
                    'input[value*="下一"]', 'button[value*="下一"]',
                    '.next-btn', '.btn-next', '#next'
                ];

                for (const selector of nextStepSelectors) {
                    if (doc.querySelector(selector)) {
                        addLog('检测到下一步按钮，提交可能已完成', 'info');
                        return true;
                    }
                }

            } catch (e) {

            }

            await new Promise(r => setTimeout(r, 200));
        }

        addLog('等待提交完成超时', 'error');
        return false;
    }


    async function autoAnswerQuizInDocument(doc) {
        try {
            if (!isStudyingChapters) return false;
            if (!isQuizPageDoc(doc)) return false;

            await injectConsoleDecryptCode(doc);
            const qs = collectQuizQuestions(doc);
            if (!qs || qs.length === 0) return false;
            addLog(`检测到章节测验，共 ${qs.length} 题，开始作答...`, 'info');


            for (const q of qs) {
                if (!isStudyingChapters) { addLog('已暂停刷章节，停止测验作答', 'info'); return false; }
                const promptInfo = { type: q.type, question: q.question || `题目 ${q.qid}`, options: q.options || [] };
                const ans = await getAnswer(promptInfo);
                if (ans) {
                    fillQuizAnswer(doc, q.qid, q.type, ans);
                }
                await new Promise(r => setTimeout(r, 500));
            }

            addLog('章节测验答题完成，准备提交...', 'success');


            await new Promise(r => setTimeout(r, 1000));


            addLog('验证提交参数...', 'info');
            validateAndFixSubmitParams(doc);


            let submitSuccess = false;
            const targetWindow = doc.defaultView || window;


            try {

                const originalAlert = targetWindow.alert;
                targetWindow.alert = function(msg) {
                    addLog(`阻止弹窗: ${msg}`, 'debug');
                    if (msg && msg.includes('code-1')) {
                        addLog('检测到code-1错误，尝试其他提交方式', 'info');
                        return;
                    }
                    return originalAlert.call(this, msg);
                };


                if (typeof targetWindow.btnBlueSubmit === 'function') {
                    addLog('使用学习通标准提交流程', 'info');


                    targetWindow.btnBlueSubmit();
                    await new Promise(r => setTimeout(r, 1000));


                    if (typeof targetWindow.submitCheckTimes === 'function') {
                        targetWindow.submitCheckTimes();
                        addLog('执行submitCheckTimes完成', 'success');
                    }


                    if (typeof targetWindow.noSubmit === 'function') {
                        addLog('检测到noSubmit函数，跳过自动提交以避免错误', 'info');
                    }

                    submitSuccess = true;
                    addLog('学习通标准提交流程执行完成', 'success');
                } else if (typeof targetWindow.submitWork === 'function') {

                    addLog('使用submitWork提交', 'info');
                    targetWindow.submitWork();
                    submitSuccess = true;
                } else {

                    submitSuccess = findAndClickQuizSubmitButton(doc);
                }

                // 恢复原始alert targetWindow.alert = originalAlert;
            } catch (e) {
                addLog(`提交流程执行失败: ${e.message}`, 'error');

                submitSuccess = findAndClickQuizSubmitButton(doc);
            }

            if (submitSuccess) {
                addLog('已执行提交操作，等待确认弹窗...', 'info');

                await new Promise(r => setTimeout(r, 500));


                const confirmHandled = await handleSubmitConfirmDialog(doc, 3000);
                if (confirmHandled) {
                    addLog('已处理提交确认弹窗', 'success');
                } else {
                    addLog('未检测到确认弹窗或处理失败', 'info');
                }

                const submitCompleted = await waitForQuizSubmitCompletion(doc, 8000);
                if (submitCompleted) {
                    addLog('章节测验提交完成，准备跳转下一节...', 'success');


                    await new Promise(r => setTimeout(r, 2000));


                    if (isStudyingChapters) {
                        const jumpSuccess = gotoNextSection(doc);
                        if (jumpSuccess) {
                            addLog('已自动跳转到下一节', 'success');
                        } else {
                            addLog('自动跳转失败，请手动切换到下一节', 'error');
                        }
                    }
                } else {
                    addLog('等待提交完成超时，但将继续尝试跳转', 'info');

                    await new Promise(r => setTimeout(r, 1500));
                    if (isStudyingChapters) gotoNextSection(doc);
                }
            } else {
                addLog('未找到提交按钮，跳过提交直接尝试跳转', 'info');

                await new Promise(r => setTimeout(r, 1000));
                if (isStudyingChapters) gotoNextSection(doc);
            }

            return true;
        } catch (e) {
            addLog(`章节测验自动作答失败: ${e.message}`, 'error');
            return false;
        }
    }
})();