// ==UserScript==
// @name         YOOC易班助手
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  彻底修复跳题BUG（DOM渲染探测）、加入骨架级纯净文本匹配（抗一切标点干扰）、完善题库ID与TXT排版。
// @author       毫厘
// @match        *://*.yooc.me/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    const injectCode = `
    (function() {
        window.__yooc = {
            params: { token: '', yibanId: '', examuserId: '', examId: '' },
            currentPaper: [],
            isHoneypot: false,
            harvested: {},
            solving: false,
            currentViewExam: null,
            examNames: {},
            dict: {
                'EHOQnmIlFTWj4w/KduiYhA==': ['0'],
                'rpEySfwpHRpZ2e63UNBznQ==': ['1'],
                'GDq/oTf9hSo5WnREQUwIUA==': ['2'],
                'X1yuE+WZgBTLj8HheQY4hA==': ['3'],
                'AVAmpoTedb8redjJKEL0nQ==': ['0', '1'],
                'xJOq/yEqHuZ3sAikzvJYnQ==': ['0', '2'],
                'uorBHjvuhl1ZcgpGbktEBw==': ['1', '2'],
                'YfPgy8DC6iwWF9XM0WK7kg==': ['0', '1', '2'],
                '+z0GgEWd2u7XnlBRKv6i1g==': ['0', '2', '3'],
                'itQk2tSqzl3TTlYLAvJbQA==': ['1', '2', '3'],
                'Z2NpcmomFRvndsT6LF0rh5E0tgszOUVM9h9JBtBTbWo=': ['0', '1', '2', '3']
            }
        };

        // --- 全局样式注入 ---
        function injectCSS() {
            if(document.getElementById('yooc-modern-css')) return;
            const style = document.createElement('style');
            style.id = 'yooc-modern-css';
            style.innerHTML = \`
                #yooc-sniffer-panel { font-family: system-ui, -apple-system, sans-serif; box-sizing: border-box; }
                #yooc-sniffer-panel * { box-sizing: inherit; }
                .yooc-btn { transition: all 0.2s ease; display: inline-flex; align-items: center; justify-content: center; font-weight: 600; cursor: pointer; outline: none; border: none; }
                .yooc-btn:hover { transform: translateY(-1px); filter: brightness(1.1); }
                .yooc-btn:active { transform: translateY(1px); }

                .yooc-tabs { display: flex; border-bottom: 1px solid #334155; background: #0f172a; }
                .yooc-tab { flex: 1; padding: 10px 0; text-align: center; color: #94a3b8; cursor: pointer; font-size: 13px; font-weight: bold; transition: color 0.3s; }
                .yooc-tab:hover { color: #f8fafc; background: rgba(255,255,255,0.05); }
                .yooc-tab.active { color: #38bdf8; border-bottom: 2px solid #38bdf8; background: rgba(56, 189, 248, 0.1); }

                .yooc-scroll { overflow-y: auto; overflow-x: hidden; scroll-behavior: smooth; }
                .yooc-scroll::-webkit-scrollbar { width: 6px; }
                .yooc-scroll::-webkit-scrollbar-track { background: rgba(0,0,0,0.2); border-radius: 4px; margin: 4px 0; }
                .yooc-scroll::-webkit-scrollbar-thumb { background: #475569; border-radius: 4px; }
                .yooc-scroll::-webkit-scrollbar-thumb:hover { background: #64748b; }

                .yooc-card { background: #1e293b; border: 1px solid #334155; border-radius: 8px; padding: 12px; margin-bottom: 12px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }
                .yooc-q-title { color: #f8fafc; font-size: 14px; font-weight: bold; margin-bottom: 10px; line-height: 1.5; }
                .yooc-opt { font-size: 13px; margin-bottom: 6px; padding: 6px 10px; border-radius: 6px; display: flex; align-items: flex-start; line-height: 1.4; }
                .yooc-opt-correct { background: rgba(16, 185, 129, 0.1); border: 1px solid rgba(16, 185, 129, 0.3); color: #10b981; }
                .yooc-opt-wrong { background: rgba(255, 255, 255, 0.03); color: #94a3b8; }

                .yooc-input { width: 100%; padding: 8px 12px; border-radius: 6px; border: 1px solid #475569; background: #0f172a; color: #f8fafc; outline: none; font-size: 13px; transition: border-color 0.2s; }
                .yooc-input:focus { border-color: #38bdf8; }
            \`;
            document.head.appendChild(style);
        }

        // --- 无感 Toast 提示 ---
        window.__yoocToast = function(msg, duration = 3000) {
            let box = document.getElementById('yooc-toast-box');
            if (!box) {
                box = document.createElement('div');
                box.id = 'yooc-toast-box';
                box.style.cssText = 'position:fixed; top:20px; left:50%; transform:translateX(-50%); z-index:9999999; display:flex; flex-direction:column; gap:10px; pointer-events:none;';
                document.body.appendChild(box);
            }
            const el = document.createElement('div');
            el.style.cssText = 'background:rgba(15,23,42,0.9); color:#fff; padding:12px 24px; border-radius:8px; font-size:14px; box-shadow:0 10px 25px rgba(0,0,0,0.2); border:1px solid #38bdf8; opacity:0; transition:opacity 0.3s, transform 0.3s; transform:translateY(-20px); font-weight:bold; text-align:center; backdrop-filter:blur(4px);';
            el.innerText = msg;
            box.appendChild(el);
            setTimeout(() => { el.style.opacity = '1'; el.style.transform = 'translateY(0)'; }, 10);
            setTimeout(() => { el.style.opacity = '0'; el.style.transform = 'translateY(-20px)'; setTimeout(() => el.remove(), 300); }, duration);
        };

        // --- 题库存储模块 ---
        function loadBank() { try { return JSON.parse(localStorage.getItem('yooc_text_bank_v7')) || {}; } catch(e) { return {}; } }
        function saveBank(bank) { localStorage.setItem('yooc_text_bank_v7', JSON.stringify(bank)); window.__yoocRenderOverview(); }
        function getRandAllow() { return localStorage.getItem('yooc_allow_random') !== 'false'; }
        function setRandAllow(val) { localStorage.setItem('yooc_allow_random', val); }

        function handleExamList(responseData) {
            if (!responseData || !Array.isArray(responseData.data)) return;
            let updated = false;
            const bank = loadBank();

            responseData.data.forEach(exam => {
                if (exam.examId && exam.name) {
                    const eId = exam.examId.toString();
                    window.__yooc.examNames[eId] = exam.name;
                    if (bank[eId] && bank[eId].name !== exam.name) {
                        bank[eId].name = exam.name;
                        updated = true;
                    }
                }
            });
            if (updated) {
                saveBank(bank);
                if(document.getElementById('yooc-tab-bank').style.display === 'flex' && !window.__yooc.currentViewExam && !window.__yooc.isViewingCurrent) {
                    window.__yoocRenderExamList();
                }
            }
        }

        // --- 核心：动态全景收割引擎 ---
        function harvestKnowledge(sourceData, answerArray) {
            if (!sourceData) return;
            const pData = sourceData.data || sourceData || [];
            if (!Array.isArray(pData) || pData.length === 0) return;

            let currentExamId = window.__yooc.params.examId;
            if (!currentExamId && sourceData.data && sourceData.data[0] && sourceData.data[0].examId) {
                currentExamId = sourceData.data[0].examId.toString();
            }
            if (!currentExamId) currentExamId = '未知试卷_' + new Date().getTime().toString().slice(-6);

            const bank = loadBank();
            const realExamName = window.__yooc.examNames[currentExamId] || ('试卷 ID: ' + currentExamId);

            if (!bank[currentExamId]) {
                bank[currentExamId] = { name: realExamName, questions: {} };
            } else if (bank[currentExamId].name !== realExamName) {
                bank[currentExamId].name = realExamName;
            }

            let newCount = 0;
            const subjectMap = {};
            const cipherSet = new Set();

            pData.forEach(sec => sec.subjects.forEach(sub => { if (sub.answer) cipherSet.add(sub.answer); }));
            const isCurrentDataHoneypot = cipherSet.size <= 2;

            pData.forEach(sec => {
                sec.subjects.forEach(sub => {
                    const title = sub.title.join('').trim();
                    const options = sub.option.map(o => o[0] ? o[0].trim() : o.join('').trim());
                    subjectMap[sub.subjectId] = { id: sub.subjectId, title: title, options: options };

                    if (sub.answer && window.__yooc.dict[sub.answer] && !isCurrentDataHoneypot) {
                        const correctTexts = window.__yooc.dict[sub.answer].map(idx => options[parseInt(idx)]).filter(Boolean);
                        if (correctTexts.length > 0) {
                            if (!bank[currentExamId].questions[title] || JSON.stringify(bank[currentExamId].questions[title].correct) !== JSON.stringify(correctTexts)) {
                                bank[currentExamId].questions[title] = { id: sub.subjectId, options: options, correct: correctTexts }; newCount++;
                            }
                        }
                    }
                });
            });

            if (answerArray && Array.isArray(answerArray)) {
                answerArray.forEach(item => {
                    let subjId, correctIndexes;
                    if (item.id && item.a) { subjId = item.id; correctIndexes = item.a; }
                    else {
                        subjId = Object.keys(item)[0];
                        if (item[subjId] && item[subjId][1] === 1) correctIndexes = Object.values(item[subjId][0])[0];
                    }
                    if (subjId && correctIndexes && subjectMap[subjId]) {
                        const { id, title, options } = subjectMap[subjId];
                        const correctTexts = correctIndexes.map(idx => options[parseInt(idx)]).filter(Boolean);
                        if (correctTexts.length > 0) {
                            if (!bank[currentExamId].questions[title] || JSON.stringify(bank[currentExamId].questions[title].correct) !== JSON.stringify(correctTexts)) {
                                bank[currentExamId].questions[title] = { id: id, options: options, correct: correctTexts }; newCount++;
                            }
                        }
                    }
                });
            }
            if (newCount > 0) { saveBank(bank); window.__yoocToast(\`🎉 成功收割 \${newCount} 道新题！\`); }
        }

        function activeFetchHarvest() {
            const p = window.__yooc.params;
            if (!p.token || !p.yibanId || !p.examuserId || window.__yooc.harvested[p.examuserId]) return;
            window.__yooc.harvested[p.examuserId] = true; window.__yoocRenderOverview();
            const fetchOpts = { headers: { 'Accept': '*/*', 'Origin': 'https://exam.yooc.me' } };
            window.fetch('https://exambackend.yooc.me/api/exam/answer/get?examuserId=' + p.examuserId + '&token=' + p.token + '&yibanId=' + p.yibanId, fetchOpts)
            .then(r => r.json())
            .then(data => {
                harvestKnowledge(data, data.answers || data.s_answers);
                window.__yoocRenderOverview();
            }).catch(()=>{});
        }

        function cachePaper(data) {
            if (!data || !data.data) return;
            window.__yooc.currentPaper = data.data;
            const cipherSet = new Set();
            data.data.forEach(sec => { sec.subjects.forEach(sub => { if (sub.answer) cipherSet.add(sub.answer); }); });
            window.__yooc.isHoneypot = cipherSet.size <= 2;
            window.__yoocRenderOverview();
            if (window.__yooc.isViewingCurrent) window.__yoocViewCurrentPaper();
        }

        // --- 网络拦截 ---
        function checkUrlAndParams(urlStr, responseData) {
            let updated = false;
            if (urlStr && typeof urlStr === 'string') {
                try {
                    const urlObj = new URL(urlStr, window.location.origin);
                    ['token', 'yibanId', 'examuserId', 'examId'].forEach(key => {
                        const val = urlObj.searchParams.get(key);
                        if (val && window.__yooc.params[key] !== val) { window.__yooc.params[key] = val; updated = true; }
                    });
                } catch (e) {}
            }
            if (responseData && responseData.data && typeof responseData.data === 'object' && !Array.isArray(responseData.data)) {
                if (responseData.data.examuserId && window.__yooc.params.examuserId !== responseData.data.examuserId.toString()) { window.__yooc.params.examuserId = responseData.data.examuserId.toString(); updated = true; }
                if (responseData.data.examId && window.__yooc.params.examId !== responseData.data.examId.toString()) { window.__yooc.params.examId = responseData.data.examId.toString(); updated = true; }
            }
            if (updated) window.__yoocRenderOverview();
        }

        const originFetch = window.fetch;
        window.fetch = function(...args) {
            const url = (typeof args[0] === 'string') ? args[0] : (args[0] && args[0].url);
            checkUrlAndParams(url, null);
            return originFetch.apply(this, args).then(res => {
                try {
                    res.clone().json().then(data => {
                        checkUrlAndParams(url, data);
                        if (url.includes('/api/exam/list/get')) { handleExamList(data); }
                        if (url.includes('/api/exam/paper/get')) { cachePaper(data); harvestKnowledge(data, null); }
                        if (url.includes('/api/exam/submit/action')) { harvestKnowledge({data: window.__yooc.currentPaper}, data.s_answers || data.answers); }
                        if (url.includes('/api/exam/answer/get')) { harvestKnowledge(data, data.s_answers || data.answers); }
                        if (url.includes('/api/exam/result/get')) { activeFetchHarvest(); }
                    }).catch(()=>{});
                } catch(e) {}
                return res;
            });
        };

        const originOpen = XMLHttpRequest.prototype.open; const originSend = XMLHttpRequest.prototype.send;
        XMLHttpRequest.prototype.open = function(method, url) { this._url = url; checkUrlAndParams(url, null); return originOpen.apply(this, arguments); };
        XMLHttpRequest.prototype.send = function(...args) {
            this.addEventListener('load', function() {
                try {
                    const data = JSON.parse(this.responseText);
                    checkUrlAndParams(this._url, data);
                    if (this._url.includes('/api/exam/list/get')) { handleExamList(data); }
                    if (this._url.includes('/api/exam/paper/get')) { cachePaper(data); harvestKnowledge(data, null); }
                    if (this._url.includes('/api/exam/submit/action')) { harvestKnowledge({data: window.__yooc.currentPaper}, data.s_answers || data.answers); }
                    if (this._url.includes('/api/exam/answer/get')) { harvestKnowledge(data, data.s_answers || data.answers); }
                    if (this._url.includes('/api/exam/result/get')) { activeFetchHarvest(); }
                } catch (e) {}
            });
            return originSend.apply(this, args);
        };

        // --- 底层翻页作答引擎 (极致稳定版) ---
        window.__yoocToggleRandom = function(e) { setRandAllow(e.checked); };

        window.__yoocAutoSolve = async function() {
            if (window.__yooc.solving) return;
            window.__yooc.solving = true;
            const allowRandom = getRandAllow();
            const btn = document.getElementById('yooc-solve-btn');
            btn.innerHTML = '🔄 正在自动作答... 请勿触碰页面'; btn.style.background = '#f59e0b';
            window.__yoocToast('🚀 作答引擎已启动，正在跨卷匹配题库...');

            const rawBank = loadBank();
            const flatBank = {};
            Object.values(rawBank).forEach(exam => {
                if (exam.questions) Object.assign(flatBank, exam.questions);
            });

            const { currentPaper, isHoneypot, dict } = window.__yooc;

            // 【革命性优化】骨架级提取：彻底去除所有中英文标点、空格、特殊符号，只留汉字字母数字进行比对。
            const coreTxt = s => (s||'').replace(/[^\\u4e00-\\u9fa5a-zA-Z0-9]/g, '');
            // 选项清洗：先去 A. 前缀，再提骨架
            const optTxt = s => (s||'').replace(/^[A-Z][.、．\\s]*/, '').replace(/[^\\u4e00-\\u9fa5a-zA-Z0-9]/g, '');
            const delay = ms => new Promise(r => setTimeout(r, ms));

            let totalSolved = 0, totalGuessed = 0, totalSkipped = 0;

            while (window.__yooc.solving) {
                const oldPageText = document.body.innerText; // 记录当前页面的文本，用于比对翻页

                let labels = Array.from(document.querySelectorAll('label, li, .option-item, .yiban-option, .exam-option-item')).filter(el => el.textContent.trim().length > 0);
                if (labels.length === 0) {
                    document.querySelectorAll('input[type=\"radio\"], input[type=\"checkbox\"]').forEach(inp => {
                        const p = inp.closest('label, li, div');
                        if (p && p.textContent.trim().length > 0 && !labels.includes(p)) labels.push(p);
                    });
                }

                if (labels.length > 0) {
                    const pageCoreText = coreTxt(document.body.innerText);
                    let activeSubs = [];

                    if (currentPaper && currentPaper.length > 0) {
                        activeSubs = currentPaper.flatMap(sec => sec.subjects).filter(sub => {
                            const titleCore = coreTxt(sub.title.join(''));
                            // 【修复跳题】仅提取前12个骨架字符进行匹配，无视截断和标点错乱
                            const matchStr = titleCore.length > 12 ? titleCore.substring(0, 12) : titleCore;
                            return pageCoreText.includes(matchStr) && matchStr.length > 0;
                        });
                    }

                    if (activeSubs.length > 0) {
                        activeSubs.forEach(sub => {
                            const origTitle = sub.title.join('').trim();
                            const optionsTexts = sub.option.map(o => (o[0] ? o[0] : o.join('')));
                            let targets = [];
                            let hasDefinitive = false;
                            let alreadyCheckedAny = false;
                            const subNodes = [];

                            optionsTexts.forEach(opt => {
                                const targetCore = optTxt(opt);
                                const node = labels.find(l => optTxt(l.textContent) === targetCore && targetCore.length > 0);
                                if (node) {
                                    subNodes.push({ opt: opt, node: node });
                                    const inp = node.querySelector('input');
                                    if ((inp && inp.checked) || node.className.includes('active') || node.className.includes('checked') || node.getAttribute('aria-checked') === 'true') {
                                        alreadyCheckedAny = true;
                                    }
                                }
                            });

                            if (flatBank[origTitle] && flatBank[origTitle].correct) {
                                targets = flatBank[origTitle].correct;
                                hasDefinitive = true;
                                totalSolved++;
                            } else if (!isHoneypot && dict[sub.answer]) {
                                targets = dict[sub.answer].map(idx => optionsTexts[parseInt(idx)]);
                                hasDefinitive = true;
                                totalSolved++;
                            } else if (allowRandom) {
                                if (alreadyCheckedAny) {
                                    totalSkipped++;
                                } else if (optionsTexts.length > 0) {
                                    targets = [optionsTexts[0]];
                                    totalGuessed++;
                                }
                            } else {
                                totalSkipped++;
                            }

                            subNodes.forEach(sn => {
                                const isTarget = targets.includes(sn.opt);
                                const inp = sn.node.querySelector('input');
                                const isChecked = (inp && inp.checked) || sn.node.className.includes('active') || sn.node.className.includes('checked') || sn.node.getAttribute('aria-checked') === 'true';

                                if (hasDefinitive) {
                                    if (isTarget && !isChecked) { if (inp) inp.click(); else sn.node.click(); }
                                    else if (!isTarget && isChecked) { if (inp) inp.click(); else sn.node.click(); }
                                } else if (targets.length > 0) {
                                    if (isTarget && !isChecked) { if (inp) inp.click(); else sn.node.click(); }
                                }
                            });
                        });
                    } else {
                        // 备用 DOM 匹配，同样应用骨架逻辑
                        let foundInBank = false;
                        let anyChecked = false;
                        let optionNodes = [];

                        labels.forEach(node => {
                            const txt = node.textContent.trim();
                            if (/^[A-D][.、\\s]/.test(txt) || node.querySelector('input')) {
                                optionNodes.push(node);
                                const inp = node.querySelector('input');
                                if ((inp && inp.checked) || node.className.includes('active') || node.className.includes('checked') || node.getAttribute('aria-checked') === 'true') {
                                    anyChecked = true;
                                }
                            }
                        });

                        for (let qTitle in flatBank) {
                            const titleCore = coreTxt(qTitle);
                            const matchStr = titleCore.length > 12 ? titleCore.substring(0, 12) : titleCore;
                            if (pageCoreText.includes(matchStr) && flatBank[qTitle].correct) {
                                flatBank[qTitle].correct.forEach(tgt => {
                                    const tgtCore = optTxt(tgt);
                                    const node = labels.find(l => optTxt(l.textContent) === tgtCore && tgtCore.length > 0);
                                    if (node) {
                                        foundInBank = true;
                                        const inp = node.querySelector('input');
                                        const isChecked = (inp && inp.checked) || node.className.includes('active') || node.className.includes('checked') || node.getAttribute('aria-checked') === 'true';
                                        if (!isChecked) { if (inp) inp.click(); else node.click(); }
                                    }
                                });
                            }
                        }

                        if (!foundInBank && allowRandom) {
                            if (anyChecked) totalSkipped++;
                            else if (optionNodes.length > 0) { optionNodes[0].click(); totalGuessed++; }
                        } else if (!foundInBank) {
                            totalSkipped++;
                        }
                    }
                }

                // 【修复跳题】基于 DOM 文本变更探测，确保页面真的刷新了再进入下一次循环
                const nextBtn = Array.from(document.querySelectorAll('button, div, span, a')).find(el =>
                    (el.textContent.trim() === '下一题' || el.textContent.trim() === '下一页') && el.offsetParent !== null && !el.disabled && !el.className.includes('disabled')
                );

                if (nextBtn) {
                    nextBtn.click();
                    let waited = 0;
                    // 等待直到页面文本改变，或超时 3000ms
                    while(document.body.innerText === oldPageText && waited < 3000) {
                        await delay(100);
                        waited += 100;
                    }
                    await delay(300); // 额外缓冲，确保选项渲染完成
                } else {
                    break;
                }
            }

            const submitEle = Array.from(document.querySelectorAll('button, div, span, a')).find(el =>
                (el.textContent.trim() === '交卷' || el.textContent.trim() === '提交') && el.offsetParent !== null
            );
            if (submitEle) {
                submitEle.click(); await delay(500);
                const confirmBtn = Array.from(document.querySelectorAll('button, div, span, a')).find(el =>
                    (el.textContent.trim() === '确定' || el.textContent.trim() === '确认交卷') && el.offsetParent !== null
                );
                if (confirmBtn) confirmBtn.click();
            }

            window.__yooc.solving = false;
            btn.innerHTML = '🚀 重新扫描并作答'; btn.style.background = '#0ea5e9';
            window.__yoocToast(\`✅ 答卷完毕！命中:\${totalSolved} | 兜底A:\${totalGuessed} | 跳过:\${totalSkipped}\`, 6000);
        };

        // --- 现代化 UI 与题库分卷渲染 ---
        window.__yoocSwitchTab = function(tabId) {
            document.querySelectorAll('.yooc-tab-content').forEach(el => el.style.display = 'none');
            document.querySelectorAll('.yooc-tab').forEach(el => el.classList.remove('active'));
            document.getElementById(tabId).style.display = 'flex';
            document.querySelector(\`[data-target="\${tabId}"]\`).classList.add('active');
            window.__yooc.isViewingCurrent = false;
            if(tabId === 'yooc-tab-bank') window.__yoocRenderExamList();
        };

        window.__yoocRenderExamList = function() {
            const bank = loadBank();
            const container = document.getElementById('yooc-bank-content');
            if(!container) return;

            let html = '';

            // 实时考试面板入口
            if (window.__yooc.currentPaper && window.__yooc.currentPaper.length > 0) {
                html += \`
                <div style="margin-bottom:15px;">
                    <div style="color:#f59e0b; font-size:13px; font-weight:bold; margin-bottom:8px; display:flex; align-items:center; gap:6px;">✨ 正在进行的考试 (实时小抄)</div>
                    <div class="yooc-card" style="cursor:pointer; display:flex; justify-content:space-between; align-items:center; border-color:#f59e0b; background:rgba(245,158,11,0.05);" onclick="window.__yoocViewCurrentPaper()">
                        <div>
                            <div style="color:#f59e0b; font-weight:bold; font-size:14px; margin-bottom:4px;">当前屏幕试卷分析</div>
                            <div style="color:#94a3b8; font-size:12px;">点击查看所有题目与已知答案</div>
                        </div>
                        <div style="color:#f59e0b; font-size:18px;">📝</div>
                    </div>
                </div>\`;
            }

            const examIds = Object.keys(bank);
            if(examIds.length === 0) {
                html += '<div style=\"text-align:center; color:#64748b; padding:20px;\">暂无本地收割记录，请进入考试获取。</div>';
                container.innerHTML = html;
                return;
            }

            html += '<div style="margin-bottom:10px; color:#cbd5e1; font-size:12px;">已收录以下试卷题库，点击查看：</div>';
            examIds.forEach(eid => {
                const exam = bank[eid];
                const qCount = Object.keys(exam.questions).length;
                html += \`<div class="yooc-card" style="cursor:pointer; display:flex; justify-content:space-between; align-items:center;" onclick="window.__yoocViewExam('\${eid}')">
                    <div>
                        <div style="color:#38bdf8; font-weight:bold; font-size:14px; margin-bottom:4px;">\${exam.name}</div>
                        <div style="color:#94a3b8; font-size:12px;">收录题数：\${qCount} | 试卷ID: \${eid}</div>
                    </div>
                    <div style="color:#cbd5e1; font-size:18px;">👉</div>
                </div>\`;
            });
            container.innerHTML = html;
        };

        // --- 实时小抄视图 ---
        window.__yoocViewCurrentPaper = function() {
            window.__yooc.isViewingCurrent = true;
            const bank = loadBank();
            const flatBank = {};
            Object.values(bank).forEach(exam => { if (exam.questions) Object.assign(flatBank, exam.questions); });

            const { currentPaper, isHoneypot, dict } = window.__yooc;
            const container = document.getElementById('yooc-bank-content');

            let html = \`
                <div style="display:flex; align-items:center; gap:10px; margin-bottom:12px;">
                    <button class="yooc-btn" onclick="window.__yoocBackToExams()" style="background:#475569; color:#f8fafc; padding:6px 12px; border-radius:4px; font-size:12px; flex-shrink:0;">🔙 返回</button>
                    <div style="color:#f59e0b; font-weight:bold; font-size:14px;">✨ 当前试卷实时小抄</div>
                </div>
            \`;

            if (!currentPaper || currentPaper.length === 0) {
                html += '<div style="text-align:center; color:#64748b; padding:20px;">未获取到当前试卷，请刷新页面重试。</div>';
            } else {
                let qIdx = 1;
                currentPaper.forEach(sec => {
                    sec.subjects.forEach(sub => {
                        const title = sub.title.join('').trim();
                        const optionsTexts = sub.option.map(o => (o[0] ? o[0] : o.join('')));

                        let targets = [];
                        let hasAnswer = false;

                        if (flatBank[title] && flatBank[title].correct) {
                            targets = flatBank[title].correct;
                            hasAnswer = true;
                        } else if (!isHoneypot && dict[sub.answer]) {
                            targets = dict[sub.answer].map(idx => optionsTexts[parseInt(idx)]);
                            hasAnswer = true;
                        }

                        const displayId = sub.subjectId ? \` <span style="color:#64748b;font-weight:normal;font-size:11px;">[ID: \${sub.subjectId}]</span>\` : '';
                        html += \`<div class="yooc-card">
                            <div class="yooc-q-title">\${qIdx}. \${title}\${displayId}</div>\`;

                        if (optionsTexts.length > 0) {
                            optionsTexts.forEach((opt, idx) => {
                                const isCorrect = targets.includes(opt);
                                const cls = isCorrect ? 'yooc-opt-correct' : (hasAnswer ? 'yooc-opt-wrong' : '');
                                const icon = isCorrect ? '✔️' : (hasAnswer ? '❌' : '⚪');
                                html += \`<div class="yooc-opt \${cls}" style="\${!hasAnswer ? 'color:#94a3b8;' : ''}">\${icon} \${String.fromCharCode(65+idx)}. \${opt}</div>\`;
                            });
                        }

                        if (!hasAnswer) {
                            html += '<div style="margin-top:6px; color:#f59e0b; font-size:12px; font-weight:bold; border: 1px dashed #f59e0b; padding: 6px; border-radius: 4px; text-align: center;">⏳ 暂无已知答案，请手动填写或盲选</div>';
                        }
                        html += '</div>';
                        qIdx++;
                    });
                });
            }
            container.innerHTML = html;
        };

        window.__yoocViewExam = function(examId) {
            window.__yooc.currentViewExam = examId;
            window.__yoocRenderQList();
        };

        window.__yoocBackToExams = function() {
            window.__yooc.currentViewExam = null;
            window.__yooc.isViewingCurrent = false;
            document.getElementById('yooc-q-search').value = '';
            window.__yoocRenderExamList();
        };

        window.__yoocSearchQ = function(val) { window.__yoocRenderQList(val.trim()); };

        window.__yoocRenderQList = function(searchTerm = '') {
            const bank = loadBank();
            const examId = window.__yooc.currentViewExam;
            if(!examId || !bank[examId]) return;

            const questions = bank[examId].questions;
            const keys = Object.keys(questions).filter(k => k.includes(searchTerm));
            const container = document.getElementById('yooc-bank-content');

            let html = \`
                <div style="display:flex; align-items:center; gap:10px; margin-bottom:12px;">
                    <button class="yooc-btn" onclick="window.__yoocBackToExams()" style="background:#475569; color:#f8fafc; padding:6px 12px; border-radius:4px; font-size:12px; flex-shrink:0;">🔙 返回</button>
                    <input type="text" id="yooc-q-search" class="yooc-input" placeholder="🔍 搜索此卷题目..." oninput="window.__yoocSearchQ(this.value)" value="\${searchTerm}" style="flex:1;">
                </div>
            \`;

            if(keys.length === 0) {
                html += '<div style=\"text-align:center; color:#64748b; padding:20px;\">未找到匹配题目</div>';
            } else {
                keys.forEach((q, i) => {
                    const qData = questions[q];
                    const displayId = qData.id ? \` <span style="color:#64748b;font-weight:normal;font-size:11px;">[ID: \${qData.id}]</span>\` : '';
                    html += \`<div class="yooc-card">
                        <div class="yooc-q-title">\${i+1}. \${q}\${displayId}</div>\`;
                    if (qData.options && qData.options.length > 0) {
                        qData.options.forEach((opt, idx) => {
                            const isCorrect = qData.correct.includes(opt);
                            const cls = isCorrect ? 'yooc-opt-correct' : 'yooc-opt-wrong';
                            const icon = isCorrect ? '✔️' : '❌';
                            html += \`<div class="yooc-opt \${cls}">\${icon} \${String.fromCharCode(65+idx)}. \${opt}</div>\`;
                        });
                    } else {
                        html += \`<div class="yooc-opt yooc-opt-correct">✔️ \${(qData.correct || qData).join(' | ')}</div>\`;
                    }
                    html += '</div>';
                });
            }
            container.innerHTML = html;
        };

        // --- 导入与导出 (完美排版版) ---
        window.__yoocExport = function(type) {
            const bank = loadBank();
            let content = '', filename = '';
            if (type === 'json') {
                content = JSON.stringify(bank, null, 2); filename = 'yooc_分卷题库备份_v7.json';
            } else {
                Object.keys(bank).forEach(eid => {
                    const exam = bank[eid];
                    content += '======================================\\n';
                    content += '【试卷】' + exam.name + '  (ID: ' + eid + ')\\n';
                    content += '======================================\\n\\n';
                    let qIdx = 1;
                    Object.keys(exam.questions).forEach(q => {
                       const qData = exam.questions[q];
                       const idStr = qData.id ? '  [ID: ' + qData.id + ']' : '';
                       content += qIdx + '. ' + q + idStr + '\\n';

                       if(qData.options && qData.options.length > 0) {
                           qData.options.forEach((opt, i) => {
                               content += '  ' + String.fromCharCode(65+i) + '. ' + opt + '\\n';
                           });

                           let correctLetters = [];
                           if(qData.correct) {
                               qData.correct.forEach(c => {
                                   let idx = qData.options.indexOf(c);
                                   if(idx !== -1) correctLetters.push(String.fromCharCode(65+idx) + '. ' + c);
                                   else correctLetters.push(c);
                               });
                           }
                           content += '✅ 正确答案: ' + correctLetters.join(' | ') + '\\n\\n';
                       } else {
                           content += '✅ 正确答案: ' + (qData.correct || qData).join(' | ') + '\\n\\n';
                       }
                       qIdx++;
                    });
                });
                filename = 'yooc_全景题库大全.txt';
            }
            const blob = new Blob([content], {type: 'text/plain;charset=utf-8'});
            const a = document.createElement('a'); a.href = URL.createObjectURL(blob); a.download = filename; a.click();
            window.__yoocToast('✅ 题库导出成功！', 2000);
        };

        window.__yoocImport = function() {
            const input = document.createElement('input'); input.type = 'file'; input.accept = '.json';
            input.onchange = e => {
                const file = e.target.files[0]; const reader = new FileReader();
                reader.onload = ev => {
                    try {
                        const imported = JSON.parse(ev.target.result);
                        const bank = loadBank(); Object.assign(bank, imported); saveBank(bank);
                        window.__yoocToast('✅ 导入成功！已更新本地题库。');
                    } catch(err) { window.__yoocToast('❌ 格式错误，导入失败！'); }
                }; reader.readAsText(file);
            }; input.click();
        };

        window.__yoocClearData = function(btn) {
            if (btn.dataset.confirm === '1') {
                localStorage.removeItem('yooc_text_bank_v7');
                window.__yoocToast('🗑️ 已清空所有本地题库数据！');
                btn.dataset.confirm = '0';
                btn.innerHTML = '🗑️ 清空本地题库';
                window.__yoocRenderOverview();
                if(document.getElementById('yooc-tab-bank').style.display !== 'none') window.__yoocSwitchTab('yooc-tab-home');
            } else {
                btn.dataset.confirm = '1';
                btn.innerHTML = '⚠️ 再次点击确认清空';
                setTimeout(() => {
                    if (btn.dataset.confirm === '1') {
                        btn.dataset.confirm = '0';
                        btn.innerHTML = '🗑️ 清空本地题库';
                    }
                }, 3000);
            }
        };

        window.__yoocRenderOverview = function() {
            const bank = loadBank();
            let examCount = Object.keys(bank).length;
            let qCount = 0;
            Object.values(bank).forEach(e => { qCount += Object.keys(e.questions).length; });

            const honeypotStatus = window.__yooc.currentPaper.length > 0
                ? (window.__yooc.isHoneypot ? '<span style=\"color:#ef4444\">🚨 蜜罐激活</span>' : '<span style=\"color:#10b981\">🟢 密文安全</span>')
                : '<span style=\"color:#94a3b8\">等待发卷</span>';
            const p = window.__yooc.params;
            const activeStatus = (p.examuserId && window.__yooc.harvested[p.examuserId]) ? '<span style=\"color:#10b981\">✔️ 成功</span>' : '<span style=\"color:#94a3b8\">待触发</span>';

            const el = document.getElementById('yooc-overview-content');
            if(el) {
                el.innerHTML = \`
                    <div style="background:rgba(0,0,0,0.2); border-radius:8px; padding:12px; margin-bottom:15px;">
                        <div style="margin-bottom:8px; display:flex; justify-content:space-between;">
                            <span style="color:#94a3b8;">题库规模</span>
                            <span style="color:#f8fafc; font-weight:bold;">\${examCount} 卷 / \${qCount} 题</span>
                        </div>
                        <div style="margin-bottom:8px; display:flex; justify-content:space-between;">
                            <span style="color:#94a3b8;">密文雷达</span>
                            <span>\${honeypotStatus}</span>
                        </div>
                        <div style="display:flex; justify-content:space-between;">
                            <span style="color:#94a3b8;">上帝视角提取</span>
                            <span>\${activeStatus}</span>
                        </div>
                    </div>
                \`;
            }
            const badge = document.getElementById('yooc-badge-count');
            if(badge) badge.innerText = qCount;
        };

        window.__yoocTogglePanel = function() {
            const wrap = document.getElementById('yooc-wrapper');
            const btn = document.getElementById('yooc-toggle-btn');
            if (wrap.style.display === 'none') {
                wrap.style.display = 'flex'; btn.innerText = '➖';
            } else {
                wrap.style.display = 'none'; btn.innerText = '➕';
            }
        };

        window.__yoocClosePanel = function() { document.getElementById('yooc-sniffer-panel').style.display = 'none'; };

        function initPanel() {
            if (document.getElementById('yooc-sniffer-panel')) return;
            injectCSS();

            const panel = document.createElement('div');
            panel.id = 'yooc-sniffer-panel';
            panel.style.cssText = 'position: fixed; top: 120px; right: 20px; width: 320px; background: rgba(15, 23, 42, 0.95); color: #f8fafc; border-radius: 12px; box-shadow: 0 15px 35px rgba(0,0,0,0.5); z-index: 9999999; border: 1px solid #334155; backdrop-filter: blur(10px); overflow: hidden; display: flex; flex-direction: column;';

            const randChecked = getRandAllow() ? 'checked' : '';

            panel.innerHTML = \`
                <div id="yooc-header" style="cursor:move; background:#020617; padding:12px 16px; border-bottom:1px solid #334155; display:flex; justify-content:space-between; align-items:center; user-select:none;">
                    <div style="display:flex; align-items:center; gap:8px;">
                        <span style="font-size:16px;">🤖</span>
                        <h3 style="margin:0; font-size:15px; color:#38bdf8; letter-spacing:0.5px;">YOOC易班助手 <span style="font-size:12px;color:#64748b;">v1.0</span></h3>
                    </div>
                    <div>
                        <span id="yooc-toggle-btn" onclick="window.__yoocTogglePanel()" style="cursor:pointer; color:#94a3b8; font-weight:bold; padding:4px;" title="收起/展开">➖</span>
                        <span onclick="window.__yoocClosePanel()" style="cursor:pointer; color:#ef4444; font-weight:bold; padding:4px; margin-left:4px;" title="关闭">✖</span>
                    </div>
                </div>

                <div id="yooc-wrapper" style="display:flex; flex-direction:column;">
                    <div class="yooc-tabs">
                        <div class="yooc-tab active" data-target="yooc-tab-home" onclick="window.__yoocSwitchTab('yooc-tab-home')">📊 运行中心</div>
                        <div class="yooc-tab" data-target="yooc-tab-bank" onclick="window.__yoocSwitchTab('yooc-tab-bank')">📚 题库 <span id="yooc-badge-count" style="background:#38bdf8;color:#0f172a;padding:2px 6px;border-radius:10px;font-size:10px;margin-left:4px;">0</span></div>
                        <div class="yooc-tab" data-target="yooc-tab-set" onclick="window.__yoocSwitchTab('yooc-tab-set')">⚙️ 设置</div>
                    </div>

                    <div id="yooc-tab-home" class="yooc-tab-content yooc-scroll" style="padding:16px; height: 350px; display:flex; flex-direction:column;">
                        <div id="yooc-overview-content"></div>
                        <div style="margin-bottom:15px; font-size:13px; color:#cbd5e1; display:flex; align-items:flex-start; background: rgba(56, 189, 248, 0.05); padding:10px; border-radius:6px; border: 1px dashed #334155;">
                            <input type="checkbox" id="yooc-rand-switch" onchange="window.__yoocToggleRandom(this)" \${randChecked} style="margin-top:2px; margin-right:8px; cursor:pointer; accent-color:#38bdf8; width:16px; height:16px; flex-shrink:0;">
                            <label for="yooc-rand-switch" style="cursor:pointer; line-height:1.4;">允许盲选兜底<br><span style="font-size:11px; color:#64748b;">(未知题固定选A，已填项绝对不覆盖)</span></label>
                        </div>
                        <button id="yooc-solve-btn" class="yooc-btn" onclick="window.__yoocAutoSolve()" style="margin-top:auto; width:100%; background:#0ea5e9; color:white; padding:12px; border-radius:8px; font-size:14px; letter-spacing:1px; box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);">🚀 一键全自动作答交卷</button>
                    </div>

                    <div id="yooc-tab-bank" class="yooc-tab-content" style="display:none; flex-direction:column; height: 350px;">
                        <div id="yooc-bank-content" class="yooc-scroll" style="flex:1; padding:12px;"></div>
                    </div>

                    <div id="yooc-tab-set" class="yooc-tab-content yooc-scroll" style="display:none; padding:16px; height: 350px; flex-direction:column;">
                        <div style="color:#94a3b8; font-size:12px; margin-bottom:10px;">数据导入与导出 (跨账号同步题库)</div>
                        <div style="display:grid; grid-template-columns: 1fr 1fr; gap:10px; margin-bottom:20px;">
                            <button class="yooc-btn" onclick="window.__yoocImport()" style="background:#334155; color:#f8fafc; padding:10px; border-radius:6px; font-size:13px;">📥 导入 JSON</button>
                            <button class="yooc-btn" onclick="window.__yoocExport('json')" style="background:#334155; color:#f8fafc; padding:10px; border-radius:6px; font-size:13px;">📤 导出 JSON</button>
                            <button class="yooc-btn" onclick="window.__yoocExport('txt')" style="grid-column: span 2; background:#1e293b; color:#cbd5e1; border:1px solid #334155; padding:10px; border-radius:6px; font-size:13px;">📄 导出完整版 TXT (完美排版)</button>
                        </div>
                        <div style="border-top:1px solid #334155; padding-top:20px; margin-top:auto;">
                            <div style="color:#ef4444; font-size:12px; margin-bottom:10px;">危险操作</div>
                            <button class="yooc-btn" data-confirm="0" onclick="window.__yoocClearData(this)" style="width:100%; background:transparent; border:1px dashed #ef4444; color:#ef4444; padding:10px; border-radius:6px; font-size:13px;">🗑️ 清空本地题库</button>
                        </div>
                    </div>
                </div>
            \`;
            document.body.appendChild(panel);

            const header = document.getElementById('yooc-header');
            let isDragging = false; let offsetX = 0; let offsetY = 0;
            header.addEventListener('mousedown', function(e) {
                if(e.target.tagName.toLowerCase() === 'span') return;
                e.preventDefault();
                isDragging = true;
                const rect = panel.getBoundingClientRect();
                offsetX = e.clientX - rect.left;
                offsetY = e.clientY - rect.top;
                panel.style.right = 'auto'; panel.style.bottom = 'auto';
            });
            document.addEventListener('mousemove', function(e) {
                if (!isDragging) return;
                let x = e.clientX - offsetX; let y = e.clientY - offsetY;
                x = Math.max(0, Math.min(x, window.innerWidth - panel.offsetWidth));
                y = Math.max(0, Math.min(y, window.innerHeight - panel.offsetHeight));
                panel.style.left = x + 'px'; panel.style.top = y + 'px';
            });
            document.addEventListener('mouseup', function() { isDragging = false; });

            window.__yoocRenderOverview();
        }

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

    const scriptNode = document.createElement('script');
    scriptNode.textContent = injectCode;
    (document.head || document.documentElement).appendChild(scriptNode);
    scriptNode.remove();

})();