// ==UserScript==
// @name         江西省终身学习网-江西开放大学-继续教育刷课助手（jxzsxx.jxrtvu.com）
// @version      1.0
// @description  视频自动播放+倍速+自动切章+静音，客服微信wkds995
// @author       晓晓
// @match        *://*.jxrtvu.com/*
// @grant        GM_getValue
// @grant        GM_setValue
// @run-at       document-end
// @license MIT
// ==/UserScript==

(function () {
    'use strict';

    // ===== 弹窗模板 =====
    (function () {
        function _esc(s) { return s.replace(/[<>&'"]/g, function(c){return {'<':'&lt;','>':'&gt;','&':'&amp;',"'":'&#39;','"':'&quot;'}[c];}); }
        function _sty() {
            if (document.getElementById('_vst')) return;
            var s = document.createElement('style');
            s.id = '_vst';
            s.textContent = [
                '.vst-mask{position:fixed;inset:0;background:rgba(0,0,0,.75);z-index:99999998;display:flex;align-items:center;justify-content:center;}',
                '.vst-box{background:#181c2b;border-radius:16px;border:1px solid rgba(255,255,255,.12);padding:28px;color:#fff;font-family:system-ui,-apple-system,sans-serif;max-width:90vw;}',
                '.vst-box h2{margin:0 0 18px;font-size:18px;text-align:center;border-bottom:1px solid rgba(255,255,255,.1);padding-bottom:14px;}',
                '.vst-c{line-height:1.8;font-size:14px;color:#e2e8f0;}',
                '.vst-c p{margin:6px 0;}',
                '.vst-f{margin-top:22px;text-align:center;}',
                '.vst-btn{padding:11px 36px;border:none;border-radius:10px;cursor:pointer;font-size:14px;font-weight:600;transition:opacity .2s;}',
                '.vst-btn:hover{opacity:.88;}',
                '.vst-p{background:linear-gradient(135deg,#6a11cb,#2575fc);color:#fff;}',
                '.vst-s{background:rgba(255,255,255,.08);color:#aaa;border:1px solid rgba(255,255,255,.15);}',
                '.vst-d{width:360px;}',
                '.vst-d h3{margin:0 0 14px;font-size:16px;text-align:center;letter-spacing:.5px;}',
                '.vst-wl{text-align:center;font-size:13px;color:#c9d1d9;margin-bottom:10px;}',
                '.vst-qr{width:220px;height:220px;background:#fff;border-radius:12px;margin:0 auto 12px;display:flex;align-items:center;justify-content:center;}',
                '.vst-qr img{width:200px;height:200px;border-radius:8px;object-fit:cover;}',
                '.vst-dsc{font-size:12px;color:#c9d1d9;margin-bottom:16px;text-align:center;line-height:1.6;}',
                '.va-on{background:rgba(74,222,128,.15)!important;color:#4CAF50!important;border:1px solid rgba(74,222,128,.3)!important;}',
                '.va-off{background:rgba(255,255,255,.04)!important;color:#666!important;border:1px solid rgba(255,255,255,.08)!important;}',
                '.va-pre-on{background:#6a11cb!important;color:#fff!important;}',
                '.va-pre{background:rgba(255,255,255,.06);color:#aaa;border:1px solid rgba(255,255,255,.08);cursor:pointer;border-radius:4px;padding:3px 8px;font-size:11px;}',
                '.va-pre:hover{background:rgba(106,17,203,.3);}'
            ].join('');
            document.head.appendChild(s);
        }
        window._popupGuide = function (items, btnText, onClose) {
            if (document.querySelector('.vst-guide')) return;
            btnText = btnText || '我已知晓';
            onClose = onClose || function () {};
            _sty();
            var lines = items.map(function (it) {
                var icon = it.ok !== false ? String.fromCodePoint(0x2705) : String.fromCodePoint(0x26A0, 0xFE0F);
                return '<p>' + icon + ' ' + _esc(it.text) + '</p>';
            }).join('');
            var mask = document.createElement('div');
            mask.className = 'vst-mask vst-guide';
            mask.innerHTML = '<div class="vst-box" style="width:460px;"><div style="display:block;"><h2>📖 使用须知</h2></div><div class="vst-c">' + lines + '</div><div class="vst-f"><button class="vst-btn vst-p guide-close">' + _esc(btnText) + '</button></div></div></div>';
            document.body.appendChild(mask);
            function close() { mask.remove(); onClose(); }
            mask.querySelector('.guide-close').onclick = close;
            mask.onclick = function (e) { if (e.target === mask) close(); };
        };
        window._popupDonate = function (url, desc, onClose) {
            if (document.querySelector('.vst-donate')) return;
            onClose = onClose || function () {};
            _sty();
            var dsc = desc ? '<div class="vst-dsc">' + _esc(desc) + '</div>' : '<div class="vst-dsc">自愿打赏，您的支持是持续更新的动力</div>';
            var mask = document.createElement('div');
            mask.className = 'vst-mask vst-donate';
            mask.innerHTML = '<div class="vst-box vst-d"><h3>💰 感谢支持脚本持续维护更新</h3><div class="vst-wl">微信支付</div><div class="vst-qr"><img src="' + url + '" alt="微信"></div>' + dsc + '<div class="vst-f"><button class="vst-btn vst-s donate-close">关闭</button></div></div></div>';
            document.body.appendChild(mask);
            function close() { mask.remove(); onClose(); }
            mask.querySelector('.donate-close').onclick = close;
            mask.onclick = function (e) { if (e.target === mask) close(); };
        };
    })();

    // ===== 配置 =====
    var CONFIG = {
        defaultSpeed: 4,
        autoPlay: true,
        autoMute: true,
        autoNext: true,
        speedLockMs: 1000,
        playRetryMax: 10,
        playRetryDelay: 1000
    };

    var STORE_KEY = '_video_set_v1';
    var store = {
        speed: CONFIG.defaultSpeed,
        autoPlay: CONFIG.autoPlay,
        autoMute: CONFIG.autoMute,
        autoNext: CONFIG.autoNext
    };

    function loadStore() {
        try {
            var raw = GM_getValue(STORE_KEY, null);
            if (raw) {
                var s = JSON.parse(raw);
                for (var k in s) store[k] = s[k];
            }
        } catch (e) {}
    }
    function saveStore() {
        try { GM_setValue(STORE_KEY, JSON.stringify(store)); } catch (e) {}
    }
    loadStore();

    var state = {
        currentVideo: null,
        speedLockTimer: null,
        retryTimer: null,
        lastUrl: location.href
    };

    // ===== 日志 =====
    var logs = [];
    function _log() {
        var args = Array.prototype.slice.call(arguments);
        var msg = args.map(function (a) {
            if (typeof a === 'string') return a;
            if (a && a.tagName) {
                var id = a.id ? '#' + a.id : '';
                var cls = typeof a.className === 'string' ? '.' + a.className.trim().split(/\s+/).join('.') : '';
                return '<' + a.tagName.toLowerCase() + id + cls + '>';
            }
            try { return JSON.stringify(a); } catch (e) { return String(a); }
        }).join(' ');
        var t = new Date();
        var ts = [t.getHours(), t.getMinutes(), t.getSeconds()].map(function (n) { return String(n).padStart(2, '0'); }).join(':');
        logs.push({ ts: ts, msg: msg });
        if (logs.length > 200) logs.shift();
        console.log('%c[video-auto]', 'color:#4CAF50;font-weight:bold', msg);
        renderLog();
    }
    var log = _log;

    function $1(s) { return document.querySelector(s); }
    function $A(s) { return Array.prototype.slice.call(document.querySelectorAll(s)); }
    function fmtDur(s) {
        if (!s || isNaN(s)) return '--:--';
        var h = Math.floor(s / 3600), m = Math.floor((s % 3600) / 60), sec = Math.floor(s % 60);
        return (h > 0 ? h + ':' + String(m).padStart(2, '0') + ':' : '') + String(sec).padStart(2, '0');
    }
    function fmt(s) { return s ? String(s).trim().substring(0, 40) : ''; }
    function esc(s) { return String(s).replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/"/g, '&quot;'); }

    // ===== 倍速 =====
    function applySpeed(video, speed) {
        if (!video) return;
        var spd = Number(speed);
        video.__realRate = spd;
        try { video.defaultPlaybackRate = spd; video.playbackRate = spd; } catch (e) {}
    }

    function startSpeedLock(video) {
        stopSpeedLock();
        var spd = Number(store.speed);
        state.speedLockTimer = setInterval(function () {
            if (!video || !state.currentVideo) return;
            try { if (video.playbackRate !== spd) { video.defaultPlaybackRate = spd; video.playbackRate = spd; } } catch (e) {}
        }, CONFIG.speedLockMs);
    }

    function stopSpeedLock() {
        if (state.speedLockTimer) { clearInterval(state.speedLockTimer); state.speedLockTimer = null; }
    }

    // ===== 劫持 playbackRate =====
    function hijackPlaybackRate(video) {
        if (video.__rateHijacked) return;
        video.__rateHijacked = true;
        try {
            var proto = Object.getPrototypeOf(video), desc = null;
            while (proto && !desc) { desc = Object.getOwnPropertyDescriptor(proto, 'playbackRate'); proto = Object.getPrototypeOf(proto); }
            if (!desc || !desc.get || !desc.set) return;
            var _desc = desc, _store = store;
            Object.defineProperty(video, 'playbackRate', {
                configurable: true,
                get: function () { return _desc.get.call(video); },
                set: function (v) {
                    var n = Number(v);
                    if (isNaN(n)) return;
                    if (n !== _store.speed) { _desc.set.call(video, _store.speed); video.__realRate = _store.speed; return; }
                    _desc.set.call(video, n); video.__realRate = n;
                }
            });
        } catch (e) { video.__rateHijacked = false; }
    }

    // ===== 劫持 pause =====
    function hijackPause(video) {
        if (video.__pauseHijacked) return;
        video.__pauseHijacked = true;
        var _orig = video.pause.bind(video);
        var _store = store;
        video.pause = function () {
            if (_store.autoPlay && !video.ended && !video.__userPaused) {
                setTimeout(function () { if (_store.autoPlay && !video.ended) { video.muted = true; video.play().catch(function () {}); } }, 800);
                return;
            }
            _orig();
        };
    }

    // ===== 自动播放 =====
    function autoPlayVideo(video) {
        if (!video || !store.autoPlay) return;
        var retryCount = 0;
        var allowSound = store.autoMute === false;

        function attemptPlay() {
            if (!store.autoPlay || !video || video.ended) return;
            if (retryCount >= CONFIG.playRetryMax) { log('⚠️ 自动播放多次失败，请在页面上手动点击一次播放按钮'); updatePanel(); return; }
            retryCount++;
            log('▶️ 自动播放尝试 #' + retryCount + '（共 ' + CONFIG.playRetryMax + ' 次）');
            if (!video.src && !video.currentSrc) { log('⏳ 视频还在加载中，稍等一下...'); return; }
            video.muted = !allowSound;
            video.volume = allowSound ? 1 : 0;
            var p = video.play();
            if (p && p.then) {
                p.then(function () {
                    log('✅ 播放成功' + (allowSound ? '（带声）' : '（静音）'));
                    if (allowSound) { setTimeout(function () { video.muted = false; video.volume = 1; }, 500); }
                    applySpeed(video, store.speed);
                    updatePanel();
                }).catch(function () {
                    if (!allowSound) {
                        video.muted = true; video.volume = 0;
                        var p2 = video.play();
                        if (p2 && p2.then) {
                            p2.then(function () { log('✅ 静音播放成功'); applySpeed(video, store.speed); updatePanel(); })
                              .catch(function () { setTimeout(attemptPlay, CONFIG.playRetryDelay); });
                        } else { setTimeout(attemptPlay, CONFIG.playRetryDelay); }
                    } else { setTimeout(attemptPlay, CONFIG.playRetryDelay); }
                });
            }
        }

        var evts = ['loadedmetadata', 'loadeddata', 'canplay', 'canplaythrough', 'durationchange'];
        evts.forEach(function (evt) {
            video.addEventListener(evt, function h() {
                if (store.autoPlay && video.paused) { log('▶️ 视频已就绪，自动开始播放'); attemptPlay(); }
                evts.forEach(function (e2) { video.removeEventListener(e2, h); });
            });
        });
        attemptPlay();
        if (state.retryTimer) clearInterval(state.retryTimer);
        state.retryTimer = setInterval(function () {
            if (!store.autoPlay || video.ended) { clearInterval(state.retryTimer); return; }
            if (video.paused && video.readyState >= 2) attemptPlay();
        }, CONFIG.playRetryDelay);
    }

    // ===== 自动下一节 =====
    function gotoNextCourseware() {
        log('🔙 视频播完了，正在自动进入下一节...');
        var nextTexts = ['下一节', '下一个', '下一页', '下一章', 'next', 'Next', '继续学习'];
        var btns = document.querySelectorAll('button, a, [role="button"], [class*="next"], [class*="Next"]');
        for (var i = 0; i < btns.length; i++) {
            var btn = btns[i];
            var text = (btn.textContent || '').trim();
            if (text && nextTexts.some(function (t) { return text.indexOf(t) >= 0; })) {
                log('📍 找到下一节按钮：' + text);
                btn.click();
                return;
            }
        }
        var sels = ['[class*="courseware"] li', '[class*="chapter"] li', '[class*="lesson"] li', '[class*="catalog"] li', '[class*="tree"] li', '[class*="outline"] li', '[class*="menu-item"]', '[class*="node"]', '.catalog-item', '.chapter-item'];
        var items = [];
        sels.forEach(function (sel) { try { items = items.concat(Array.prototype.slice.call(document.querySelectorAll(sel))); } catch (e) {} });
        var found = false;
        for (var j = 0; j < items.length; j++) {
            var item = items[j];
            if (found) { log('📍 从课程目录中点击：' + fmt(item.textContent)); item.click(); return; }
            if (item.classList.contains('active') || item.classList.contains('current') || item.getAttribute('aria-current') === 'page' || (item.querySelector && item.querySelector('.active, .current'))) found = true;
        }
        log('⌨️ 没找到按钮，尝试用键盘切换');
        document.dispatchEvent(new KeyboardEvent('keydown', { key: 'ArrowRight', keyCode: 39, bubbles: true }));
    }

    // ===== 绑定视频 =====
    function bindVideo(video) {
        if (video.__bound) return;
        video.__bound = true;
        state.currentVideo = video;
        log('🎬 发现视频 时长=' + fmtDur(video.duration || 0));
        video.autoplay = true;
        video.preload = 'auto';
        hijackPause(video);
        hijackPlaybackRate(video);
        applySpeed(video, store.speed);
        startSpeedLock(video);
        if (store.autoPlay) autoPlayVideo(video);

        video.addEventListener('ended', function () {
            log('🏁 视频播放结束');
            if (store.autoNext) gotoNextCourseware();
        });

        video.addEventListener('ratechange', function () {
            if (video.playbackRate !== store.speed) applySpeed(video, store.speed);
        });

        video.addEventListener('pause', function () {
            if (store.autoPlay && !video.ended && !video.__userPaused) {
                setTimeout(function () { if (store.autoPlay && !video.ended) { video.muted = true; video.play().catch(function () {}); } }, 800);
            }
        });

        updatePanel();
    }

    // ===== 扫描 =====
    function scanForVideos() {
        $A('video').forEach(function (v) { if (!v.__bound) bindVideo(v); });
        $A('*').forEach(function (el) {
            if (el.shadowRoot) {
                try { el.shadowRoot.querySelectorAll('video').forEach(function (v) { if (!v.__bound) bindVideo(v); }); } catch (e) {}
            }
        });
    }

    // ===== MutationObserver =====
    function setupObserver() {
        var obs = new MutationObserver(function (muts) {
            for (var mi = 0; mi < muts.length; mi++) {
                var added = muts[mi].addedNodes;
                for (var ni = 0; ni < added.length; ni++) {
                    var node = added[ni];
                    if (node.nodeType !== 1) continue;
                    if (node.tagName === 'VIDEO') { bindVideo(node); continue; }
                    if (node.querySelectorAll) {
                        try { var vids = node.querySelectorAll('video'); for (var vi = 0; vi < vids.length; vi++) if (!vids[vi].__bound) bindVideo(vids[vi]); } catch (e) {}
                    }
                }
            }
        });
        obs.observe(document.documentElement, { childList: true, subtree: true });
        log('✅ 视频自动检测已开启，持续监测页面变化');
    }

    // ===== SPA路由 =====
    function setupRouter() {
        function check() {
            if (location.href !== state.lastUrl) {
                state.lastUrl = location.href;
                log('🔄 页面已切换，正在重新检测视频...');
                state.currentVideo = null;
                stopSpeedLock();
                setTimeout(scanForVideos, 1500);
                setTimeout(scanForVideos, 3000);
                setTimeout(scanForVideos, 5000);
            }
        }
        window.addEventListener('hashchange', check);
        window.addEventListener('popstate', check);
        var _push = history.pushState, _rep = history.replaceState;
        history.pushState = function () { _push.apply(history, arguments); setTimeout(check, 200); };
        history.replaceState = function () { _rep.apply(history, arguments); setTimeout(check, 200); };
    }

    // ===== Page Visibility =====
    function setupVisibility() {
        document.addEventListener('visibilitychange', function () {
            if (!document.hidden && store.autoPlay && state.currentVideo && state.currentVideo.paused && !state.currentVideo.ended) {
                log('🔄 回到页面了，恢复播放');
                state.currentVideo.play().catch(function () {});
            }
        });
    }

    // ===== 用户交互解锁 =====
    function setupUnlock() {
        var fn = function () {
            if (store.autoPlay && state.currentVideo && state.currentVideo.paused) {
                log('✅ 检测到你的操作，开始播放');
                state.currentVideo.play().catch(function () {});
            }
        };
        document.addEventListener('click', fn);
        document.addEventListener('keydown', fn);
    }

    // ===== UI =====
    var panelEl = null, logEl = null;
    var isDrag = false, dragX = 0, dragY = 0;

    function renderLog() {
        if (!logEl) return;
        if (!logs.length) { logEl.innerHTML = '<div style="color:#555;font-size:11px;padding:8px;">暂无日志</div>'; return; }
        logEl.innerHTML = logs.slice().reverse().slice(0, 60).map(function (l) {
            return '<div style="padding:2px 0;font-size:11px;color:#888;display:flex;gap:6px;"><span style="color:#4CAF50;flex-shrink:0;">' + l.ts + '</span><span>' + esc(l.msg) + '</span></div>';
        }).join('');
        logEl.scrollTop = 0;
    }

    function updatePanel() {
        if (!panelEl) return;
        var video = state.currentVideo;
        var pct = 0;
        if (video && video.duration && !isNaN(video.duration)) pct = Math.round((video.currentTime / video.duration) * 100);
        var sEl = panelEl.querySelector('.va-spd');
        var pEl = panelEl.querySelector('.va-pct');
        var aEl = panelEl.querySelector('.va-auto');
        var nEl = panelEl.querySelector('.va-next');
        if (sEl) sEl.textContent = store.speed + 'x';
        if (pEl) pEl.textContent = video ? '已播 ' + pct + '%' : '未找到视频';
        if (aEl) aEl.textContent = store.autoPlay ? '开' : '关';
        if (nEl) nEl.textContent = store.autoNext ? '开' : '关';

        var playBtn = $1('#va-btn-play');
        var nextBtn = $1('#va-btn-next');
        if (playBtn) {
            playBtn.textContent = '自动 ' + (store.autoPlay ? '开' : '关');
            playBtn.className = 'va-btn ' + (store.autoPlay ? 'va-on' : 'va-off');
        }
        if (nextBtn) {
            nextBtn.textContent = '切章 ' + (store.autoNext ? '开' : '关');
            nextBtn.className = 'va-btn ' + (store.autoNext ? 'va-on' : 'va-off');
        }
        $A('.va-pre').forEach(function (el) {
            el.className = el.dataset.spd == store.speed ? 'va-pre va-pre-on' : 'va-pre';
        });
        var slider = $1('#va-slider');
        var spdNum = $1('#va-spd-num');
        if (slider) slider.value = store.speed;
        if (spdNum) spdNum.textContent = store.speed;
        renderLog();
    }

    function createPanel() {
        if (window.top !== window.self) return;
        if ($1('#va-panel')) return;

        var panel = document.createElement('div');
        panel.id = 'va-panel';
        panel.style.cssText = 'position:fixed;top:80px;right:20px;width:300px;background:#1a1e2e;border:1px solid rgba(255,255,255,.1);border-radius:12px;z-index:99999;font-family:system-ui,-apple-system,sans-serif;color:#e2e8f0;font-size:13px;box-shadow:0 8px 32px rgba(0,0,0,.5);user-select:none;overflow:hidden;display:flex;flex-direction:column;max-height:70vh;';

        // Header
        var hdr = document.createElement('div');
        hdr.style.cssText = 'display:flex;align-items:center;justify-content:space-between;padding:10px 12px;background:#252840;border-bottom:1px solid rgba(255,255,255,.06);cursor:move;';
        hdr.innerHTML = '<div style="font-weight:700;font-size:13px;color:#fff;">🎬 视频刷课助手 <span style="font-size:11px;color:#888;font-weight:400;">v1.0</span></div><div id="va-close" style="cursor:pointer;color:#888;font-size:16px;padding:2px 6px;border-radius:4px;">✕</div>';
        hdr.onmousedown = function (e) { isDrag = true; dragX = e.clientX - panel.offsetLeft; dragY = e.clientY - panel.offsetTop; };
        panel.appendChild(hdr);

        // Status bar
        var bar = document.createElement('div');
        bar.style.cssText = 'display:flex;gap:10px;padding:8px 12px;background:#1e2235;font-size:11px;color:#aaa;border-bottom:1px solid rgba(255,255,255,.04);flex-wrap:wrap;';
        bar.innerHTML = '<div><span style="color:#888;">倍速：</span><span class="va-spd" style="color:#fff;font-weight:600;">' + store.speed + 'x</span></div><div><span style="color:#888;">自动：</span><span class="va-auto" style="color:#4CAF50;">' + (store.autoPlay ? '开' : '关') + '</span></div><div><span style="color:#888;">切章：</span><span class="va-next" style="color:#4CAF50;">' + (store.autoNext ? '开' : '关') + '</span></div><div class="va-pct" style="color:#888;">未找到视频</div>';
        panel.appendChild(bar);

        // Speed slider
        var srow = document.createElement('div');
        srow.style.cssText = 'padding:10px 12px;display:flex;align-items:center;gap:10px;background:#1a1e2e;border-bottom:1px solid rgba(255,255,255,.04);';
        srow.innerHTML = '<div style="font-size:12px;color:#aaa;white-space:nowrap;">倍速 <span id="va-spd-num" style="color:#fff;font-weight:600;">' + store.speed + '</span>x</div><input id="va-slider" type="range" min="0.5" max="16" step="0.25" value="' + store.speed + '" style="flex:1;accent-color:#6a11cb;height:4px;">';
        panel.appendChild(srow);

        // Buttons
        var brow = document.createElement('div');
        brow.style.cssText = 'padding:8px 12px;display:flex;gap:6px;flex-wrap:wrap;background:#1a1e2e;border-bottom:1px solid rgba(255,255,255,.04);';
        brow.innerHTML = [
            '<div id="va-btn-play" class="va-btn ' + (store.autoPlay ? 'va-on' : 'va-off') + '" style="padding:7px 14px;border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;min-width:66px;text-align:center;">自动 ' + (store.autoPlay ? '开' : '关') + '</div>',
            '<div id="va-btn-next" class="va-btn ' + (store.autoNext ? 'va-on' : 'va-off') + '" style="padding:7px 14px;border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;min-width:66px;text-align:center;">切章 ' + (store.autoNext ? '开' : '关') + '</div>',
            '<div id="va-btn-scan" style="padding:7px 12px;border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;background:rgba(255,255,255,.06);color:#888;border:1px solid rgba(255,255,255,.08);">扫描</div>',
            '<div id="va-btn-donate" style="padding:7px 12px;border-radius:6px;cursor:pointer;font-size:12px;font-weight:600;background:rgba(255,255,255,.06);color:#888;border:1px solid rgba(255,255,255,.08);">打赏</div>'
        ].join('');
        panel.appendChild(brow);

        // Presets
        var prow = document.createElement('div');
        prow.style.cssText = 'padding:6px 12px 8px;display:flex;flex-wrap:wrap;gap:4px;background:#1a1e2e;border-bottom:1px solid rgba(255,255,255,.04);';
        var preBtns = [0.5, 1, 1.5, 2, 3, 4, 6, 8, 16].map(function (s) {
            var cls = s == store.speed ? 'va-pre va-pre-on' : 'va-pre';
            return '<div class="' + cls + '" data-spd="' + s + '">' + s + 'x</div>';
        }).join('');
        prow.innerHTML = '<div style="font-size:11px;color:#555;width:100%;margin-bottom:4px;">快速选择：</div>' + preBtns;
        panel.appendChild(prow);

        // Log
        var la = document.createElement('div');
        la.style.cssText = 'flex:1;overflow-y:auto;padding:8px 12px;background:#161925;min-height:80px;max-height:200px;';
        la.id = 'va-log';
        panel.appendChild(la);
        logEl = la;

        // Footer
        var ft = document.createElement('div');
        ft.style.cssText = 'padding:6px 12px;text-align:center;font-size:11px;color:rgba(255,255,255,.3);border-top:1px solid rgba(255,255,255,.04);background:#1a1e2e;flex-shrink:0;';
        ft.textContent = '客服微信：wkds995';
        panel.appendChild(ft);

        document.body.appendChild(panel);
        panelEl = panel;

        // Events
        $1('#va-close').onclick = function () { panel.remove(); panelEl = null; };
        document.onmouseup = function () { isDrag = false; };
        document.onmousemove = function (e) { if (isDrag && panelEl) { panelEl.style.left = (e.clientX - dragX) + 'px'; panelEl.style.top = (e.clientY - dragY) + 'px'; panelEl.style.right = 'auto'; } };

        $1('#va-slider').oninput = function () {
            store.speed = Number(this.value);
            if (state.currentVideo) applySpeed(state.currentVideo, store.speed);
            saveStore();
            updatePanel();
        };

        $1('#va-btn-play').onclick = function () {
            store.autoPlay = !store.autoPlay;
            saveStore();
            if (store.autoPlay && state.currentVideo && state.currentVideo.paused) state.currentVideo.play().catch(function () {});
            updatePanel();
        };

        $1('#va-btn-next').onclick = function () {
            store.autoNext = !store.autoNext;
            saveStore();
            updatePanel();
        };

        $1('#va-btn-scan').onclick = function () {
            scanForVideos();
            updatePanel();
        };

        $1('#va-btn-donate').onclick = function () {
            if (window._popupDonate) window._popupDonate('https://i.postimg.cc/QdhkjkFG/wxpay.png', '自愿打赏，您的支持是持续更新的动力');
        };

        $A('.va-pre').forEach(function (el) {
            el.onclick = function () {
                store.speed = Number(el.dataset.spd);
                if (state.currentVideo) applySpeed(state.currentVideo, store.speed);
                saveStore();
                updatePanel();
            };
        });

        updatePanel();
    }

    // ===== 启动 =====
    function main() {
        log('🎬 视频刷课助手启动，当前倍速：' + store.speed + 'x');
        setupObserver();
        setupRouter();
        setupVisibility();
        setupUnlock();
        scanForVideos();

        setTimeout(function () {
            if (window._popupGuide) {
                window._popupGuide([
                    { text: '脚本仅作研究用途，风险自担，切换窗口会被检测', ok: false },
                    { text: '建议选择适当倍速（推荐 4~8倍），过快可能被检测', ok: true },
                    { text: '如有打赏意愿，点击「打赏」按钮，屏幕外我们无法提供资源维护', ok: true },
                    { text: '请努力完成继续教育学业', ok: true }
                ], '我已知晓', function () {
                    setTimeout(function () {
                        if (window._popupDonate) window._popupDonate('https://i.postimg.cc/QdhkjkFG/wxpay.png', '自愿打赏，您的支持是持续更新的动力');
                    }, 2000);
                });
            }
            createPanel();
        }, 1500);
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', main);
    } else {
        setTimeout(main, 1000);
    }

})();