// ==UserScript==
// @name         【快速版】2026年暑期教师研修|15秒学完！！国家中小学智慧教育平台|教师假期研修-秒过
// @namespace    http://tampermonkey.net/
// @version      3.1.1
// @description  2026年智慧中小学平台自动学习助手|支持单账号快速处理|秒过|快速|可拖动悬浮窗
// @author       bravedd
// @match        https://www.smartedu.cn/*
// @match        https://basic.smartedu.cn/*
// @grant        GM_xmlhttpRequest
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_notification
// @connect      yanxiu.pro
// @connect      qianxun1688.com
// @run-at       document-end
// @license MIT
// ==/UserScript==

(function() {
    'use strict';

    // ================= 全局变量 =================
    let isCollapsed = GM_getValue('isCollapsed', false);
    let announcement = '';
    let instructions = '';

    // 配置
    const API_BASE = 'https://yanxiu.pro';
    const ORDER_QUERY_URL = 'https://www.qianxun1688.com/orderquery/';

    // ================= 样式 =================
    function createStyles() {
        const style = document.createElement('style');
        style.textContent = `
            #smartedu-assistant {
                --se-primary: #5b6cff;
                --se-primary-2: #7b5bff;
                --se-text: #1f2430;
                --se-text-soft: #5a6072;
                --se-border: #e7eaf3;
                position: fixed;
                top: 24px;
                right: 24px;
                left: auto;
                width: 360px;
                background: rgba(255, 255, 255, 0.96);
                backdrop-filter: blur(22px);
                -webkit-backdrop-filter: blur(22px);
                border-radius: 20px;
                box-shadow: 0 18px 50px rgba(31, 36, 48, 0.22), 0 2px 8px rgba(31, 36, 48, 0.08);
                z-index: 2147483000;
                border: 1px solid rgba(255, 255, 255, 0.6);
                font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
                overflow: hidden;
                transition: box-shadow .25s ease, width .28s cubic-bezier(.25,.8,.25,1), height .28s cubic-bezier(.25,.8,.25,1);
                will-change: transform;
            }
            #smartedu-assistant.dragging { transition: none; box-shadow: 0 24px 60px rgba(31,36,48,.32); }
            #smartedu-assistant.collapsed { width: 190px; }
            #smartedu-assistant.collapsed .assistant-content { display: none; }

            #smartedu-assistant .assistant-header {
                position: relative;
                background: linear-gradient(120deg, #5b6cff 0%, #7b5bff 55%, #9b5bff 100%);
                color: #fff;
                padding: 14px 16px 14px 18px;
                display: flex;
                justify-content: space-between;
                align-items: center;
                cursor: grab;
                user-select: none;
                -webkit-user-select: none;
                touch-action: none;
            }
            #smartedu-assistant.dragging .assistant-header { cursor: grabbing; }
            #smartedu-assistant .assistant-title {
                font-weight: 700; font-size: 16px; display: flex; align-items: center; gap: 8px; letter-spacing: .3px;
            }
            #smartedu-assistant .assistant-title .logo {
                width: 28px; height: 28px; border-radius: 9px;
                background: rgba(255,255,255,.22);
                display: flex; align-items: center; justify-content: center; font-size: 16px;
            }
            #smartedu-assistant .drag-hint {
                position: absolute; left: 50%; bottom: 3px; transform: translateX(-50%);
                font-size: 10px; opacity: .55; letter-spacing: 2px; pointer-events: none;
            }
            #smartedu-assistant .collapse-btn {
                background: rgba(255,255,255,.2); border: none; color: #fff;
                width: 30px; height: 30px; border-radius: 9px; cursor: pointer;
                display: flex; align-items: center; justify-content: center;
                transition: all .25s ease; font-size: 15px; flex-shrink: 0;
            }
            #smartedu-assistant .collapse-btn:hover { background: rgba(255,255,255,.34); transform: scale(1.08); }

            #smartedu-assistant .assistant-content {
                padding: 16px; max-height: min(78vh, 720px); overflow-y: auto;
            }

            #smartedu-assistant .announcement-section {
                background: linear-gradient(135deg, rgba(91,108,255,.09), rgba(123,91,255,.09));
                border-radius: 14px; padding: 12px 14px; margin-bottom: 16px;
                border-left: 4px solid var(--se-primary);
            }
            #smartedu-assistant .announcement-title {
                color: var(--se-primary); font-weight: 700; margin-bottom: 6px; font-size: 13px;
                display: flex; align-items: center; gap: 6px;
            }
            #smartedu-assistant .announcement-content {
                color: var(--se-text-soft); font-size: 12.5px; line-height: 1.55; word-break: break-all;
            }

            #smartedu-assistant .form-group { margin-bottom: 14px; }
            #smartedu-assistant .form-label {
                font-weight: 700; margin-bottom: 7px; color: var(--se-text); font-size: 13px;
                display: flex; align-items: center; gap: 7px;
            }
            #smartedu-assistant .form-control {
                width: 100%; padding: 11px 12px; border: 1.5px solid var(--se-border);
                border-radius: 11px; font-size: 13px; transition: all .2s ease;
                background: #fff; box-sizing: border-box; color: var(--se-text);
            }
            #smartedu-assistant .form-control:focus {
                border-color: var(--se-primary); outline: none;
                box-shadow: 0 0 0 3px rgba(91,108,255,.14);
            }
            #smartedu-assistant .form-control::placeholder { color: #aab0c0; }

            #smartedu-assistant .account-group {
                border: 1.5px solid var(--se-border); border-radius: 14px;
                padding: 14px; margin-bottom: 14px; background: rgba(250,251,255,.8);
                transition: all .25s ease;
            }
            #smartedu-assistant .account-group:hover {
                border-color: rgba(91,108,255,.5); box-shadow: 0 6px 18px rgba(91,108,255,.1);
            }
            #smartedu-assistant .account-header {
                display: flex; justify-content: space-between; align-items: center; margin-bottom: 11px;
            }
            #smartedu-assistant .account-label { font-weight: 700; color: var(--se-text); font-size: 13px; }
            #smartedu-assistant .account-status {
                padding: 5px 11px; border-radius: 20px; font-size: 12px; font-weight: 700;
                display: flex; align-items: center; gap: 4px; white-space: nowrap;
            }
            #smartedu-assistant .status-default { background: #f1f3f9; color: #6c748c; }
            #smartedu-assistant .status-processing {
                background: linear-gradient(135deg,#fff3cd,#ffe8a3); color: #8a6100; animation: se-pulse 1.6s infinite;
            }
            #smartedu-assistant .status-success { background: linear-gradient(135deg,#d5f6e6,#aeeccd); color: #12794a; }
            #smartedu-assistant .status-error { background: linear-gradient(135deg,#fbdcdf,#f6b8bf); color: #a4232f; }
            #smartedu-assistant .status-warning { background: linear-gradient(135deg,#fff3cd,#ffe8a3); color: #8a6100; }
            @keyframes se-pulse { 0%,100%{opacity:1;} 50%{opacity:.6;} }

            #smartedu-assistant .account-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }

            #smartedu-assistant .btn {
                padding: 11px 12px; border: none; border-radius: 12px; font-weight: 700;
                cursor: pointer; transition: transform .18s ease, box-shadow .18s ease, filter .18s ease;
                font-size: 13.5px; display: flex; align-items: center; justify-content: center; gap: 6px;
                color: #fff; text-decoration: none; min-height: 44px; letter-spacing: .3px;
            }
            #smartedu-assistant .btn:hover { transform: translateY(-2px); filter: brightness(1.03); }
            #smartedu-assistant .btn:active { transform: translateY(0); }

            #smartedu-assistant .btn-primary { background: linear-gradient(135deg,#5b6cff,#7b5bff); box-shadow: 0 6px 16px rgba(91,108,255,.32); }
            #smartedu-assistant .btn-success { background: linear-gradient(135deg,#10b981,#34d399); box-shadow: 0 6px 16px rgba(16,185,129,.3); }
            #smartedu-assistant .btn-warning { background: linear-gradient(135deg,#f59e0b,#fbbf24); box-shadow: 0 6px 16px rgba(245,158,11,.3); }
            #smartedu-assistant .btn-danger  { background: linear-gradient(135deg,#ef4444,#f87171); box-shadow: 0 6px 16px rgba(239,68,68,.3); }
            #smartedu-assistant .btn-info    { background: linear-gradient(135deg,#3b82f6,#60a5fa); box-shadow: 0 6px 16px rgba(59,130,246,.3); }
            #smartedu-assistant .btn-cyan    { background: linear-gradient(135deg,#0ea5e9,#22d3ee); box-shadow: 0 6px 16px rgba(14,165,233,.3); }

            #smartedu-assistant .button-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }

            .smartedu-toast {
                position: fixed; top: 24px; left: 50%;
                transform: translateX(-50%) translateY(-120px);
                color: #fff; padding: 12px 20px; border-radius: 12px;
                z-index: 2147483600; transition: transform .32s cubic-bezier(.25,.8,.25,1);
                font-weight: 700; display: flex; align-items: center; gap: 8px; font-size: 14px;
                max-width: 320px; box-shadow: 0 12px 30px rgba(0,0,0,.2);
                font-family: 'PingFang SC','Microsoft YaHei',Arial,sans-serif;
                background: linear-gradient(135deg,#10b981,#12b886);
            }
            .smartedu-toast.show { transform: translateX(-50%) translateY(0); }
            .smartedu-toast.error { background: linear-gradient(135deg,#ef4444,#e03131); }

            .smartedu-modal {
                position: fixed; inset: 0; background: rgba(15,18,28,.6);
                backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
                z-index: 2147483500; display: none; opacity: 0; transition: opacity .25s ease;
            }
            .smartedu-modal.show { display: flex; align-items: center; justify-content: center; opacity: 1; }
            .smartedu-modal .modal-content {
                background: #fff; width: 90%; max-width: 560px; max-height: 80vh; border-radius: 18px;
                box-shadow: 0 24px 60px rgba(0,0,0,.35); transform: scale(.92);
                transition: transform .25s ease; overflow: hidden;
                font-family: 'PingFang SC','Microsoft YaHei',Arial,sans-serif;
            }
            .smartedu-modal.show .modal-content { transform: scale(1); }
            .smartedu-modal .modal-header {
                background: linear-gradient(120deg,#5b6cff,#7b5bff); color: #fff; padding: 18px 20px;
                display: flex; justify-content: space-between; align-items: center;
            }
            .smartedu-modal .modal-title { font-size: 17px; font-weight: 700; }
            .smartedu-modal .close-btn {
                background: rgba(255,255,255,.2); border: none; color: #fff; width: 30px; height: 30px;
                border-radius: 9px; cursor: pointer; display: flex; align-items: center; justify-content: center;
                font-size: 15px; transition: all .25s ease;
            }
            .smartedu-modal .close-btn:hover { background: rgba(255,255,255,.34); transform: rotate(90deg); }
            .smartedu-modal .modal-body {
                padding: 20px; overflow-y: auto; max-height: calc(80vh - 90px);
                color: #333; line-height: 1.7; font-size: 14px;
            }

            #smartedu-assistant .assistant-content::-webkit-scrollbar,
            .smartedu-modal .modal-body::-webkit-scrollbar { width: 6px; }
            #smartedu-assistant .assistant-content::-webkit-scrollbar-thumb,
            .smartedu-modal .modal-body::-webkit-scrollbar-thumb {
                background: linear-gradient(180deg,#5b6cff,#7b5bff); border-radius: 3px;
            }
            #smartedu-assistant .assistant-content::-webkit-scrollbar-track,
            .smartedu-modal .modal-body::-webkit-scrollbar-track { background: #f1f3f9; border-radius: 3px; }

            @media (max-width: 480px) {
                #smartedu-assistant { width: calc(100vw - 32px) !important; }
                #smartedu-assistant.collapsed { width: 190px !important; }
            }
        `;
        document.head.appendChild(style);
    }

    // ================= 主界面 =================
    function createUI() {
        const container = document.createElement('div');
        container.id = 'smartedu-assistant';
        if (isCollapsed) container.classList.add('collapsed');

        container.innerHTML = `
            <div class="assistant-header" id="assistantHeader">
                <div class="assistant-title">
                    <span class="logo">🎓</span> 学习助手（使用前必看公告和使用说明）
                </div>
                <button class="collapse-btn" id="collapseBtn" title="${isCollapsed ? '展开' : '收起'}">
                    ${isCollapsed ? '＋' : '－'}
                </button>
                <div class="drag-hint">按住拖动</div>
            </div>
            <div class="assistant-content">
                <div class="announcement-section">
                    <div class="announcement-title">📢 系统公告</div>
                    <div class="announcement-content" id="announcement">正在加载公告...</div>
                </div>

                <div class="button-grid">
                    <button class="btn btn-primary" id="startBtn">▶️ 一键开刷</button>
                    <button class="btn btn-danger" id="clearBtn">🗑️ 清空全部</button>
                </div>

                <div class="button-grid">
                    <button class="btn btn-cyan" id="orderQueryBtn">📦 查询历史订单</button>
                    <button class="btn btn-success" id="buyBtn">🛒 购买授权码</button>
                </div>

                <div class="button-grid">
                    <button class="btn btn-info" id="instructionsBtn">❓ 使用说明</button>
                    <button class="btn btn-warning" id="contactBtn">💬 联系客服</button>
                </div>

                <div class="form-group">
                    <div class="form-label">🔑 授权码</div>
                    <input type="text" class="form-control" id="authCode" placeholder="请输入授权码">
                </div>

                <div class="account-group">
                    <div class="account-header">
                        <div class="account-label">账号信息</div>
                        <div class="account-status status-default" id="accountStatus">⏱️ 待处理</div>
                    </div>
                    <div class="account-inputs">
                        <input type="text" class="form-control" id="username" placeholder="用户名">
                        <input type="password" class="form-control" id="password" placeholder="密码">
                    </div>
                </div>
            </div>
        `;

        document.body.appendChild(container);
        restorePosition(container);
        bindEventListeners();
        makeDraggable(container, document.getElementById('assistantHeader'));
    }

    // ================= 拖拽功能 =================
    function makeDraggable(container, handle) {
        let dragging = false;
        let moved = false;
        let startX = 0, startY = 0, startLeft = 0, startTop = 0;

        function getPoint(e) {
            if (e.touches && e.touches.length) return { x: e.touches[0].clientX, y: e.touches[0].clientY };
            return { x: e.clientX, y: e.clientY };
        }

        function onDown(e) {
            // 点击折叠按钮时不触发拖动
            if (e.target.closest('.collapse-btn')) return;
            const rect = container.getBoundingClientRect();
            // 切换为基于 left/top 定位
            container.style.left = rect.left + 'px';
            container.style.top = rect.top + 'px';
            container.style.right = 'auto';

            const p = getPoint(e);
            startX = p.x; startY = p.y;
            startLeft = rect.left; startTop = rect.top;
            dragging = true; moved = false;
            container.classList.add('dragging');

            document.addEventListener('mousemove', onMove, { passive: false });
            document.addEventListener('mouseup', onUp);
            document.addEventListener('touchmove', onMove, { passive: false });
            document.addEventListener('touchend', onUp);
            if (e.cancelable) e.preventDefault();
        }

        function onMove(e) {
            if (!dragging) return;
            const p = getPoint(e);
            const dx = p.x - startX;
            const dy = p.y - startY;
            if (Math.abs(dx) > 4 || Math.abs(dy) > 4) moved = true;

            let newLeft = startLeft + dx;
            let newTop = startTop + dy;

            // 限制在视口内
            const w = container.offsetWidth;
            const h = container.offsetHeight;
            const maxLeft = window.innerWidth - w;
            const maxTop = window.innerHeight - h;
            newLeft = Math.max(0, Math.min(newLeft, maxLeft < 0 ? 0 : maxLeft));
            newTop = Math.max(0, Math.min(newTop, maxTop < 0 ? 0 : maxTop));

            container.style.left = newLeft + 'px';
            container.style.top = newTop + 'px';
            if (e.cancelable) e.preventDefault();
        }

        function onUp() {
            if (!dragging) return;
            dragging = false;
            container.classList.remove('dragging');
            document.removeEventListener('mousemove', onMove);
            document.removeEventListener('mouseup', onUp);
            document.removeEventListener('touchmove', onMove);
            document.removeEventListener('touchend', onUp);

            if (moved) {
                // 保存位置
                GM_setValue('position', JSON.stringify({
                    left: parseInt(container.style.left, 10),
                    top: parseInt(container.style.top, 10)
                }));
            } else {
                // 没有移动 = 点击标题栏，触发折叠/展开
                toggleCollapse();
            }
        }

        handle.addEventListener('mousedown', onDown);
        handle.addEventListener('touchstart', onDown, { passive: false });
    }

    function restorePosition(container) {
        try {
            const saved = GM_getValue('position', '');
            if (!saved) return;
            const pos = JSON.parse(saved);
            if (typeof pos.left === 'number' && typeof pos.top === 'number') {
                const left = Math.max(0, Math.min(pos.left, window.innerWidth - 120));
                const top = Math.max(0, Math.min(pos.top, window.innerHeight - 60));
                container.style.left = left + 'px';
                container.style.top = top + 'px';
                container.style.right = 'auto';
            }
        } catch (e) { /* ignore */ }
    }

    // ================= 事件绑定 =================
    function bindEventListeners() {
        document.getElementById('collapseBtn').addEventListener('click', function(e) {
            e.stopPropagation();
            toggleCollapse();
        });
        document.getElementById('startBtn').addEventListener('click', startProcessing);
        document.getElementById('clearBtn').addEventListener('click', clearAll);
        document.getElementById('orderQueryBtn').addEventListener('click', openOrderQuery);
        document.getElementById('buyBtn').addEventListener('click', buyAuthCode);
        document.getElementById('instructionsBtn').addEventListener('click', showInstructions);
        document.getElementById('contactBtn').addEventListener('click', contactService);
    }

    // ================= 模态框 =================
    function createModal() {
        const modal = document.createElement('div');
        modal.id = 'instructionsModal';
        modal.className = 'smartedu-modal';
        modal.innerHTML = `
            <div class="modal-content">
                <div class="modal-header">
                    <div class="modal-title">使用说明</div>
                    <button class="close-btn" id="closeModalBtn">✖</button>
                </div>
                <div class="modal-body" id="modalBody">正在加载使用说明...</div>
            </div>
        `;
        document.body.appendChild(modal);
        document.getElementById('closeModalBtn').addEventListener('click', closeModal);
        modal.addEventListener('click', function(e) {
            if (e.target === modal) closeModal();
        });
    }

    // ================= 提示 =================
    function showToast(message, type = 'success') {
        const existing = document.getElementById('smartedu-toast');
        if (existing) existing.remove();

        const toast = document.createElement('div');
        toast.id = 'smartedu-toast';
        toast.className = `smartedu-toast ${type}`;
        toast.textContent = (type === 'success' ? '✅ ' : '❌ ') + message;
        document.body.appendChild(toast);

        setTimeout(() => toast.classList.add('show'), 50);
        setTimeout(() => {
            toast.classList.remove('show');
            setTimeout(() => { if (toast.parentNode) toast.parentNode.removeChild(toast); }, 350);
        }, 3000);
    }

    // ================= 稳健的响应解析 =================
    // 这里是修复“解析响应失败”的核心：
    // 1. 去掉 BOM(\uFEFF) 和首尾空白（部分服务器/浏览器会返回带 BOM 的内容导致 JSON.parse 直接失败）
    // 2. 若整体不是纯 JSON，则尝试从文本中截取第一个 { 或 [ 到最后一个 } 或 ] 的片段再解析
    // 3. 兼容返回体本身就是对象的情况
    function parseResponse(response) {
        if (!response) return null;

        // 有些环境 response.response 已经是对象
        if (response.response && typeof response.response === 'object') {
            return response.response;
        }

        let text = response.responseText;
        if (text == null) return null;
        if (typeof text !== 'string') {
            try { text = String(text); } catch (e) { return null; }
        }

        // 去 BOM + 去零宽字符 + 去首尾空白
        text = text.replace(/^\uFEFF/, '').replace(/[\u200B-\u200D\uFEFF]/g, '').trim();
        if (!text) return null;

        // 直接解析
        try { return JSON.parse(text); } catch (e) { /* 继续尝试 */ }

        // 截取 JSON 片段再解析
        const firstObj = text.indexOf('{');
        const firstArr = text.indexOf('[');
        let start = -1;
        if (firstObj === -1) start = firstArr;
        else if (firstArr === -1) start = firstObj;
        else start = Math.min(firstObj, firstArr);

        if (start !== -1) {
            const end = Math.max(text.lastIndexOf('}'), text.lastIndexOf(']'));
            if (end > start) {
                try { return JSON.parse(text.slice(start, end + 1)); } catch (e) { /* ignore */ }
            }
        }
        return null;
    }

    // ================= API 请求（带超时 + 自动重试） =================
    function makeRequest(url, options = {}, retries = 2) {
        return new Promise((resolve, reject) => {
            const attempt = (left) => {
                GM_xmlhttpRequest({
                    method: options.method || 'GET',
                    url: url,
                    headers: Object.assign(
                        { 'Accept': 'application/json, text/plain, */*' },
                        options.headers || {}
                    ),
                    data: options.data,
                    timeout: 30000,
                    responseType: 'text',
                    onload: function(response) {
                        const parsed = parseResponse(response);
                        if (parsed !== null && typeof parsed === 'object') {
                            resolve(parsed);
                            return;
                        }
                        // 解析不出 JSON：区分是服务器异常还是内容异常
                        const status = response.status || 0;
                        if (status && (status < 200 || status >= 300)) {
                            resolve({
                                status: 'error',
                                message: `服务器返回异常(${status})，请稍后重试或点击“联系客服”`
                            });
                        } else {
                            resolve({
                                status: 'error',
                                message: '响应解析失败，请刷新页面后重试；若仍失败请点击“联系客服”'
                            });
                        }
                    },
                    ontimeout: function() {
                        if (left > 0) attempt(left - 1);
                        else reject(new Error('请求超时，请检查网络后重试'));
                    },
                    onerror: function() {
                        if (left > 0) attempt(left - 1);
                        else reject(new Error('网络请求失败'));
                    }
                });
            };
            attempt(retries);
        });
    }

    // ================= 公告 / 说明 =================
    async function fetchAnnouncement() {
        try {
            const data = await makeRequest(`${API_BASE}/api/announcement`);
            if (data && data.status === 'success' && data.content) {
                document.getElementById('announcement').textContent = data.content;
                announcement = data.content;
            } else {
                document.getElementById('announcement').textContent = '欢迎使用学习助手，输入授权码与账号后点击“一键开刷”即可。';
            }
        } catch (error) {
            console.error('获取公告失败:', error);
            document.getElementById('announcement').textContent = '公告加载失败，可稍后刷新页面重试，功能不受影响。';
        }
    }

    async function fetchInstructions() {
        try {
            const data = await makeRequest(`${API_BASE}/api/instructions`);
            if (data && data.status === 'success' && data.content) {
                instructions = data.content;
            } else {
                instructions = '<p>使用说明加载失败，请稍后重试，或点击“联系客服”获取帮助。</p>';
            }
        } catch (error) {
            console.error('获取使用说明失败:', error);
            instructions = '<p>使用说明加载失败，请稍后重试，或点击“联系客服”获取帮助。</p>';
        }
    }

    // ================= 折叠/展开 =================
    function toggleCollapse() {
        const container = document.getElementById('smartedu-assistant');
        const btn = document.getElementById('collapseBtn');

        isCollapsed = !isCollapsed;
        GM_setValue('isCollapsed', isCollapsed);

        if (isCollapsed) {
            container.classList.add('collapsed');
            btn.textContent = '＋';
            btn.title = '展开';
        } else {
            container.classList.remove('collapsed');
            btn.textContent = '－';
            btn.title = '收起';
        }
    }

    // ================= 一键开刷 =================
    async function startProcessing() {
        const authCode = document.getElementById('authCode').value.trim();
        const username = document.getElementById('username').value.trim();
        const password = document.getElementById('password').value.trim();

        if (!authCode) { showToast('请输入授权码', 'error'); return; }
        if (!username || !password) { showToast('请输入完整的账号密码', 'error'); return; }

        const statusBox = document.getElementById('accountStatus');
        statusBox.className = 'account-status status-processing';
        statusBox.textContent = '⚡ 处理中...';

        try {
            const formData = new URLSearchParams();
            formData.append('auth_code', authCode);
            formData.append('username1', username);
            formData.append('password1', password);

            const data = await makeRequest(`${API_BASE}/study`, {
                method: 'POST',
                headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
                data: formData.toString()
            });

            if (data && data.status === 'success' && data.accounts && data.accounts.length > 0) {
                const account = data.accounts[0];
                if (account.status === 'success') {
                    statusBox.className = 'account-status status-success';
                    statusBox.textContent = '✅ 成功';
                    statusBox.title = account.message || '';
                    showToast('学习完成！', 'success');
                } else if (account.status === 'warning') {
                    statusBox.className = 'account-status status-warning';
                    statusBox.textContent = '⚠️ 已学习';
                    statusBox.title = account.message || '';
                    showToast('该账号已经学习过', 'success');
                } else {
                    statusBox.className = 'account-status status-error';
                    statusBox.textContent = '❌ 失败';
                    statusBox.title = account.message || '';
                    showToast(account.message || '学习失败', 'error');
                }
            } else {
                statusBox.className = 'account-status status-error';
                statusBox.textContent = '❌ 失败';
                statusBox.title = (data && data.message) || '';
                showToast((data && data.message) || '处理失败', 'error');
            }
        } catch (error) {
            console.error('提交请求失败:', error);
            statusBox.className = 'account-status status-error';
            statusBox.textContent = '❌ 失败';
            showToast(error.message || '网络错误，请重试', 'error');
        }
    }

    // ================= 其他按钮 =================
    function clearAll() {
        document.getElementById('username').value = '';
        document.getElementById('password').value = '';
        const statusBox = document.getElementById('accountStatus');
        statusBox.className = 'account-status status-default';
        statusBox.textContent = '⏱️ 待处理';
        statusBox.title = '';
        showToast('已清空账号信息', 'success');
    }

    function openOrderQuery() {
        window.open(ORDER_QUERY_URL, '_blank');
        showToast('已打开历史订单查询页面', 'success');
    }

    function buyAuthCode() {
        window.open('https://68n.cn/N5MeC', '_blank');
    }

    function showInstructions() {
        const modal = document.getElementById('instructionsModal');
        document.getElementById('modalBody').innerHTML = instructions || '<p>正在加载使用说明...</p>';
        modal.classList.add('show');
    }

    function closeModal() {
        document.getElementById('instructionsModal').classList.remove('show');
    }

    async function contactService() {
        const qqNumber = '1556818085';
        try {
            await navigator.clipboard.writeText(qqNumber);
            showToast('客服QQ号已复制到剪切板！', 'success');
        } catch (err) {
            const textArea = document.createElement('textarea');
            textArea.value = qqNumber;
            textArea.style.position = 'fixed';
            textArea.style.left = '-999999px';
            document.body.appendChild(textArea);
            textArea.select();
            try {
                document.execCommand('copy');
                showToast('客服QQ号已复制到剪切板！', 'success');
            } catch (e) {
                showToast(`复制失败，客服QQ：${qqNumber}`, 'error');
            }
            document.body.removeChild(textArea);
        }
    }

    // ================= 表单持久化 =================
    function saveFormData() {
        const el = document.getElementById('authCode');
        if (!el) return;
        const formData = {
            authCode: document.getElementById('authCode').value,
            username: document.getElementById('username').value,
            password: document.getElementById('password').value
        };
        GM_setValue('formData', JSON.stringify(formData));
    }

    function restoreFormData() {
        try {
            const formData = JSON.parse(GM_getValue('formData', '{}'));
            if (formData.authCode) document.getElementById('authCode').value = formData.authCode;
            if (formData.username) document.getElementById('username').value = formData.username;
            if (formData.password) document.getElementById('password').value = formData.password;
        } catch (e) {
            console.log('恢复表单数据失败:', e);
        }
    }

    // ================= 初始化 =================
    function init() {
        createStyles();
        createUI();
        createModal();
        fetchAnnouncement();
        fetchInstructions();
        setTimeout(restoreFormData, 100);
        setInterval(saveFormData, 5000);
        window.addEventListener('beforeunload', saveFormData);
        console.log('智慧中小学学习助手已加载 v3.1.0');
    }

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

})();