// ==UserScript==
// @name         腾讯视频片库
// @namespace    https://github.com/local/tx-unified-list
// @version      1.9.0
// @description  腾讯视频 8 频道整合：标签栏+居中弹窗筛选、竖版手机3列/PC5列、横版手机2列/PC4列、PC限宽居中、自动加载。左上搜索引擎切换(6选项含默认)、点卡片按引擎搜索、右上搜索历史(≤30条自动清理)。访问https://v.qq.com/tv-series-list/v-index.html即可使用
// @author       失辛向南
// @license      MIT
// @match        *://v.qq.com/tv-series-list/v-index.html*
// @run-at       document-idle
// @noframes
// @grant        GM_addStyle
// ==/UserScript==

(function () {
  'use strict';

  // ==================== 频道配置 ====================
  const CHANNELS = [
    { id: '100173', name: '电影',   params: 'sort=75' },
    { id: '100113', name: '电视剧', params: 'sort=75' },
    { id: '100109', name: '综艺',   params: 'sort=75' },
    { id: '100119', name: '动漫',   params: 'sort=75' },
    { id: '100150', name: '少儿',   params: 'itype=75' },
    { id: '120188', name: '短剧',   params: 'attraction=1' },
    { id: '100105', name: '纪录片', params: 'sort=75' },
    { id: '100103', name: '体育',   params: 'irace=11' },
  ];
  const BASE = 'https://v.qq.com/tv-series-list/v-index.html';
  function channelUrl(c) {
    return BASE + '?filter_params=' + c.params +
      '&page_id=channel_list_second_page&channel_id=' + c.id;
  }
  function currentChannelId() {
    try { return new URL(location.href).searchParams.get('channel_id') || ''; }
    catch (e) { return ''; }
  }

  const state = { activeTab: null };

  // ==================== 样式 ====================
  const CSS = `
    /* ---------- 自然滚动布局（不锁高度） ---------- */
    html, body {
      margin: 0 !important; padding: 0 !important;
      width: 100% !important;
      background: #fff !important;
    }
    *, *::before, *::after { box-sizing: border-box !important; }

    /* ---------- 隐藏腾讯外壳 ---------- */
    .top-bar-wrap, .left-bar-wrap, .v-left-nav-area, .top-nav-wrap,
    .search-wrap, #ssi-user-bar, .back-button, .tag-bar,
    #login_win, .web-login-container, #toast-container,
    .gatherable-layer, [class*="gatherable"] {
      display: none !important;
    }

    /* ---------- 底部遮挡清除 ---------- */
    .screen-list__footer, .screen-list__loading, .lazy-list__footer, .lazy-list__loading,
    .filter-expand, .quick_pop_footer,
    .app-download-bar, .app-download, .download-bar,
    .bottom-guide, .guide-bottom, .v-bottom-bar, .bottom-bar-wrap,
    .mobile-tab-bar, .screen-app-download,
    [class*="bottom-banner"], [class*="app-promote"],
    [class*="download-app"], [class*="footer-fixed"],
    [class*="fixed-bottom"], [class*="bottom-fixed"],
    [class*="guide-bar"], [class*="openapp"], [class*="open-app"],
    [class*="float-bar"], [class*="floatbar"] {
      display: none !important;
      visibility: hidden !important;
      height: 0 !important;
      pointer-events: none !important;
    }

    /* ---------- 强制全宽，去掉左右偏移 ---------- */
    #app, .web-page, .v-station-screen-content, .v-station-content,
    #root, #app-root, .screen-page, .screen-page__main-content,
    .screen-list, .content-wrap, vstation-screen-content {
      width: 100% !important;
      max-width: 100% !important;
      min-width: 0 !important;
      margin: 0 !important;
      padding-left: 0 !important; padding-right: 0 !important;
      height: auto !important;
      overflow: visible !important;
      display: block !important;
    }

    .screen-list {
      padding: 0 !important;
      background: #fff !important;
      position: relative !important;
      height: calc(100vh - 110px) !important;
      overflow-y: auto !important; overflow-x: hidden !important;
    }
    .grid-waterfall.screen-list__grid {
      display: block !important;
      padding: 8px 12px 24px !important;
      margin: 0 !important;
    }

    /* ---------- 顶部 #tx-header（吸顶） ---------- */
    #tx-header {
      position: sticky; top: 0; z-index: 20;
      background: #fff;
      padding: 10px 12px 0;
      box-shadow: 0 1px 4px rgba(0,0,0,.06);
      text-align: left !important;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
                   "Helvetica Neue", "Microsoft YaHei", sans-serif !important;
      color: #1a1a1a !important;
    }
    #tx-header .tx-title {
      font-size: 15px; font-weight: 700; color: #1a1a1a;
      margin: 0 0 8px;
      display: grid !important;
      grid-template-columns: 1fr auto 1fr !important;
      align-items: center !important;
      text-align: center !important;
      gap: 6px;
    }
    #tx-header .tx-title-text { text-align: center !important; justify-self: center; }
    #tx-header .tx-icon-btn {
      width: 32px; height: 32px; border: 0; background: #f0f0f3; color: #333;
      border-radius: 16px; font-size: 17px; cursor: pointer; padding: 0;
      display: flex !important; align-items: center !important;
      justify-content: center !important; font-family: inherit !important;
    }
    #tx-header .tx-engine-btn { justify-self: start !important; }
    #tx-header .tx-history-btn { justify-self: end !important; }
    #tx-channels {
      display: flex !important;
      flex-direction: row !important;
      flex-wrap: nowrap !important;
      gap: 8px; overflow-x: auto;
      scrollbar-width: none; -webkit-overflow-scrolling: touch;
      padding-bottom: 8px;
    }
    #tx-channels::-webkit-scrollbar { display: none; }
    #tx-channels button {
      flex: 0 0 auto; border: 0; background: #f0f0f3; color: #555;
      padding: 7px 16px; border-radius: 16px; font-size: 14px; cursor: pointer;
      white-space: nowrap; font-family: inherit !important; min-width: 0;
      line-height: 1.2;
    }
    #tx-channels button.active { background: #e6f4ff; color: #1a8cff; font-weight: 700; }

    /* ---------- 筛选标签栏（放在 header 里） ---------- */
    .tx-filter-tabs {
      display: flex !important;
      flex-wrap: nowrap !important;
      flex-direction: row !important;
      gap: 8px !important;
      overflow-x: auto !important;
      padding: 8px 0 !important;
      background: #fff !important;
      align-items: center !important;
      scrollbar-width: none;
      border-top: 1px solid #f0f0f0;
    }
    .tx-filter-tabs::-webkit-scrollbar { display: none; }
    .tx-tab {
      flex: 0 0 auto; border: 0; background: #f0f0f3; color: #333;
      padding: 6px 14px; border-radius: 16px; font-size: 13px; cursor: pointer;
      white-space: nowrap; font-family: inherit !important;
      line-height: 1.2;
    }
    .tx-tab.tx-active { background: #1a8cff; color: #fff; font-weight: 600; }

    /* 隐藏原站筛选 DOM */
    .filter-line { display: none !important; }

    /* ---------- 居中弹窗 ---------- */
    .tx-filter-modal { position: fixed; inset: 0; z-index: 99999; }
    .tx-filter-mask { position: absolute; inset: 0; background: rgba(0,0,0,.45); }
    .tx-filter-panel {
      position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
      background: #fff; border-radius: 16px; padding: 20px;
      width: 320px; max-width: 90vw; max-height: 70vh; overflow-y: auto;
      box-shadow: 0 8px 32px rgba(0,0,0,.2);
    }
    .tx-modal-title { font-size: 16px; font-weight: 700; color: #222; margin-bottom: 14px; }
    .tx-opt {
      display: inline-block; padding: 7px 14px; margin: 3px;
      border-radius: 16px; background: #f5f5f7; border: 0; cursor: pointer;
      font-size: 13px; color: #555; font-family: inherit !important;
      line-height: 1.2;
    }
    .tx-opt.sel { background: #1a8cff; color: #fff; font-weight: 600; }

    /* ---------- 卡片墙 grid ---------- */
    .grid-waterfall__content, .grid-waterfall__content--web {
      display: grid !important;
      grid-template-columns: repeat(3, 1fr) !important;
      gap: 10px !important;
      padding: 0 !important;
      width: 100% !important;
      max-width: 100% !important;
      margin: 0 !important;
      justify-items: stretch !important;
      align-items: stretch !important;
      justify-content: stretch !important;
    }
    .screen-cover, .screen-cover--pc {
      width: 100% !important; margin: 0 !important;
      justify-self: stretch !important;
      border-radius: 8px !important;
      background: #fff !important; box-shadow: 0 1px 4px rgba(0,0,0,.08);
      display: flex !important; flex-direction: column !important;
      overflow: visible !important; height: auto !important;
    }
    .screen-cover .poster-view, .screen-cover .item-poster {
      width: 100% !important; height: auto !important;
      aspect-ratio: 2 / 3 !important; position: relative !important;
      border-radius: 8px 8px 0 0 !important; overflow: hidden !important;
    }
    .screen-cover .poster-view__img {
      width: 100% !important; height: 100% !important;
      object-fit: cover !important; display: block !important;
    }
    .screen-cover .item-info { width: 100% !important; padding: 6px 8px 10px !important; overflow: visible !important; }
    .screen-cover .item-title {
      font-size: 13px !important; font-weight: 600 !important; color: #222 !important;
      white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block;
      line-height: 1.3;
    }
    .screen-cover .item-secondTitle {
      font-size: 11px !important; color: #999 !important; margin-top: 2px;
      white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block;
      line-height: 1.3;
    }
    .screen-cover .item-tags { display: none !important; }

    /* ---------- 横版频道 ---------- */
    body.tx-landscape .grid-waterfall__content,
    body.tx-landscape .grid-waterfall__content--web {
      grid-template-columns: repeat(2, 1fr) !important;
      gap: 12px !important;
    }
    body.tx-landscape .screen-cover .poster-view,
    body.tx-landscape .screen-cover .item-poster {
      aspect-ratio: 16 / 9 !important;
    }
    body.tx-landscape .screen-cover .item-info { padding: 8px 10px 12px !important; height: auto !important; flex: 1; }
    body.tx-landscape .screen-cover .item-title {
      font-size: 14px !important; white-space: nowrap !important;
      overflow: hidden !important; text-overflow: ellipsis !important;
      display: block !important; line-height: 1.35;
    }
    body.tx-landscape .screen-cover .item-secondTitle { margin-top: 4px; overflow: hidden !important; text-overflow: ellipsis; display: block; }

    /* ---------- PC 宽屏 ---------- */
    @media (min-width: 769px) {
      .grid-waterfall__content, .grid-waterfall__content--web {
        grid-template-columns: repeat(5, 1fr) !important;
        gap: 16px !important;
      }
      body.tx-landscape .grid-waterfall__content,
      body.tx-landscape .grid-waterfall__content--web {
        grid-template-columns: repeat(4, 1fr) !important;
        gap: 18px !important;
      }
      .grid-waterfall.screen-list__grid { padding: 16px 24px !important; }
      #tx-header { padding: 12px 24px 0 !important; }
      #tx-header .tx-title { font-size: 17px !important; }
      #tx-channels button { padding: 8px 20px !important; font-size: 14px !important; }
      .tx-filter-tabs { padding: 10px 0 !important; }
    }

    /* ---------- 窄屏手机 ---------- */
    @media (max-width: 600px) {
      #tx-header { padding: 8px 8px 0 !important; }
      #tx-channels button { padding: 6px 12px; font-size: 13px; }
      .grid-waterfall.screen-list__grid { padding: 6px !important; }
      .grid-waterfall__content, .grid-waterfall__content--web { gap: 6px !important; }
      body.tx-landscape .grid-waterfall__content,
      body.tx-landscape .grid-waterfall__content--web { gap: 8px !important; }
      body.tx-landscape .screen-cover .item-title { font-size: 13px !important; }
    }

    /* ---------- 搜索引擎菜单 + 历史面板 ---------- */
    #tx-engine-menu, #tx-history-menu {
      position: fixed; z-index: 99998; background: #fff; border-radius: 12px;
      box-shadow: 0 6px 24px rgba(0,0,0,.18); padding: 6px 0; display: none;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC",
                   "Helvetica Neue", "Microsoft YaHei", sans-serif !important;
    }
    #tx-engine-menu { top: 56px; left: 12px; min-width: 172px; }
    #tx-history-menu { top: 56px; right: 12px; min-width: 210px; max-width: 260px; max-height: 62vh; overflow-y: auto; }
    #tx-engine-menu.show, #tx-history-menu.show { display: block; }
    #tx-engine-menu h3, #tx-history-menu h3 {
      font-size: 13px; color: #999; font-weight: 500; margin: 0; padding: 8px 16px;
      display: flex; align-items: center; justify-content: space-between;
    }
    #tx-engine-menu button, #tx-history-menu button {
      display: flex; align-items: center; width: 100%; border: 0; background: transparent;
      padding: 11px 16px; font-size: 15px; color: #333; cursor: pointer; text-align: left;
      font-family: inherit !important;
    }
    #tx-engine-menu button .check { margin-left: auto; color: #00b894; font-weight: 700; }
    #tx-engine-menu button.active { background: #e6f4ff; color: #1a8cff; }
    #tx-history-menu button[data-htitle] {
      border-bottom: 1px solid #f5f5f7; display: block; white-space: nowrap;
      overflow: hidden; text-overflow: ellipsis;
    }
    #tx-history-menu .tx-history-empty { padding: 18px 16px; font-size: 13px; color: #999; text-align: center; }
    #tx-history-menu #tx-clear-history {
      width: auto; padding: 3px 10px; font-size: 12px; color: #666;
      background: #f0f0f3; border-radius: 10px; flex: 0 0 auto;
    }
  `;

  // ==================== 搜索引擎 + 搜索历史 ====================
  const ENGINES = [
    { key: 'ikan1', name: '爱看1', prefix: 'https://ikanbot.eu.org/search?q=' },
    { key: 'ikan2', name: '爱看2', prefix: 'https://www1.ikanbot.com/search?q=' },
    { key: 'quark', name: '夸克', prefix: 'https://m.quark.cn/s?q=' },
    { key: 'bing',  name: '必应', prefix: 'https://www.bing.com/search?q=' },
    { key: 'sogou', name: '搜狗', prefix: 'https://www.sogou.com/web?query=' },
    { key: 'default', name: '默认', prefix: '' },
  ];
  let engine = localStorage.getItem('tx-rank-engine') || 'ikan1';
  let engineMenu = null;
  let historyMenu = null;

  function getHistory() {
    try { return JSON.parse(localStorage.getItem('tx-rank-history') || '[]'); }
    catch (e) { return []; }
  }
  function saveHistory(arr) {
    localStorage.setItem('tx-rank-history', JSON.stringify(arr));
  }
  function pushHistory(title) {
    const h = getHistory().filter(x => x !== title);
    h.unshift(title);
    if (h.length > 30) h.length = 30;
    saveHistory(h);
  }
  function escapeHtml(s) {
    return String(s).replace(/&/g, '&amp;').replace(/"/g, '&quot;').replace(/</g, '&lt;').replace(/>/g, '&gt;');
  }

  // 按当前引擎搜索片名（引擎=「默认」时回退第一个可搜索引擎）
  function searchTitle(title) {
    if (!title) return;
    pushHistory(title);
    renderHistoryMenu();
    const en = ENGINES.find(e => e.key === engine && e.prefix) || ENGINES.find(e => e.prefix);
    window.open(en.prefix + encodeURIComponent(title), '_blank');
  }

  function renderEngineMenu() {
    engineMenu.innerHTML = '<h3>选择搜索引擎</h3>' + ENGINES.map(en => {
      const act = en.key === engine;
      return `<button data-engine="${en.key}" class="${act ? 'active' : ''}">${en.name}${act ? '<span class="check">✓</span>' : ''}</button>`;
    }).join('');
    engineMenu.querySelectorAll('[data-engine]').forEach(b => b.onclick = (ev) => {
      ev.stopPropagation();
      engine = b.dataset.engine;
      localStorage.setItem('tx-rank-engine', engine);
      renderEngineMenu();
      engineMenu.classList.remove('show');
    });
  }

  function renderHistoryMenu() {
    const h = getHistory();
    const clearHtml = h.length ? '<button id="tx-clear-history">清空</button>' : '';
    historyMenu.innerHTML = `<h3>搜索历史${clearHtml}</h3>` + (h.length
      ? h.map(t => `<button data-htitle="${escapeHtml(t)}">${escapeHtml(t)}</button>`).join('')
      : '<div class="tx-history-empty">暂无搜索记录</div>');
    historyMenu.querySelectorAll('[data-htitle]').forEach(b => b.onclick = (ev) => {
      ev.stopPropagation();
      searchTitle(b.dataset.htitle);
      renderHistoryMenu();
      historyMenu.classList.remove('show');
    });
    const clearBtn = historyMenu.querySelector('#tx-clear-history');
    if (clearBtn) clearBtn.onclick = (ev) => {
      ev.stopPropagation();
      saveHistory([]);
      renderHistoryMenu();
    };
  }

  function injectPanels() {
    engineMenu = document.createElement('div');
    engineMenu.id = 'tx-engine-menu';
    historyMenu = document.createElement('div');
    historyMenu.id = 'tx-history-menu';
    document.body.appendChild(engineMenu);
    document.body.appendChild(historyMenu);
    renderEngineMenu();
    renderHistoryMenu();
    document.addEventListener('click', (ev) => {
      const inMenu = engineMenu.contains(ev.target) || historyMenu.contains(ev.target);
      const onBtn = ev.target.closest && ev.target.closest('#tx-engine-btn, #tx-history-btn');
      if (!inMenu && !onBtn) {
        engineMenu.classList.remove('show');
        historyMenu.classList.remove('show');
      }
    });
  }

  // 卡片点击：提取片名按引擎搜索；引擎=「默认」时放行原跳转
  document.addEventListener('click', (e) => {
    const card = e.target && e.target.closest && e.target.closest('.screen-cover');
    if (!card) return;
    if (engine === 'default') return; // 默认：放行原站跳转
    const titleEl = card.querySelector('.item-title');
    const title = titleEl ? titleEl.textContent.trim() : '';
    if (!title) return;
    e.preventDefault();
    e.stopPropagation();
    searchTitle(title);
  }, true);

  // ==================== 注入 ====================
  function injectViewport() {
    let vp = document.querySelector('meta[name="viewport"]');
    if (!vp) {
      vp = document.createElement('meta');
      vp.name = 'viewport';
      (document.head || document.documentElement).appendChild(vp);
    }
    vp.content = 'width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no';
  }

  function injectCSS() {
    if (typeof GM_addStyle === 'function') GM_addStyle(CSS);
    else {
      const s = document.createElement('style');
      s.textContent = CSS;
      (document.head || document.documentElement).appendChild(s);
    }
  }

  // ==================== 顶部频道栏 ====================
  function buildHeader() {
    if (document.getElementById('tx-header')) return;
    const activeId = currentChannelId();
    const header = document.createElement('div');
    header.id = 'tx-header';
    let btns = '';
    CHANNELS.forEach(c => {
      btns += `<button data-id="${c.id}" class="${c.id === activeId ? 'active' : ''}">${c.name}</button>`;
    });
    header.innerHTML = `
      <div class="tx-title">
        <button class="tx-icon-btn tx-engine-btn" id="tx-engine-btn" title="搜索设置">☰</button>
        <span class="tx-title-text">腾讯视频 · 全频道榜单</span>
        <button class="tx-icon-btn tx-history-btn" id="tx-history-btn" title="搜索历史"><svg viewBox="0 0 24 24" width="16" height="16" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><path d="M3 12a9 9 0 1 0 9-9 9.75 9.75 0 0 0-6.74 2.74L3 8"/><path d="M3 3v5h5"/><path d="M12 7v5l4 2"/></svg></button>
      </div>
      <div id="tx-channels">${btns}</div>`;

    const main = document.querySelector('.screen-page__main-content') ||
                 document.querySelector('.screen-page') ||
                 document.getElementById('app-root');
    if (!main) return;
    main.insertBefore(header, main.firstChild);
    header.querySelectorAll('#tx-channels button').forEach(btn => {
      btn.addEventListener('click', () => {
        const c = CHANNELS.find(x => x.id === btn.dataset.id);
        if (c) location.href = channelUrl(c);
      });
    });
    const engBtn = header.querySelector('#tx-engine-btn');
    if (engBtn) engBtn.addEventListener('click', (ev) => {
      ev.stopPropagation();
      historyMenu.classList.remove('show');
      engineMenu.classList.toggle('show');
    });
    const histBtn = header.querySelector('#tx-history-btn');
    if (histBtn) histBtn.addEventListener('click', (ev) => {
      ev.stopPropagation();
      engineMenu.classList.remove('show');
      renderHistoryMenu();
      historyMenu.classList.toggle('show');
    });
    const act = header.querySelector('#tx-channels button.active');
    if (act && act.scrollIntoView) act.scrollIntoView({ inline: 'center', block: 'nearest' });
  }

  // ==================== 横竖版自动识别 ====================
  function detectMode() {
    const imgs = document.querySelectorAll('.poster-view__img');
    // 找第一张已加载、有 naturalWidth 的图
    let chosen = null;
    imgs.forEach(im => { if (!chosen && im.complete && im.naturalWidth > 50) chosen = im; });
    if (!chosen && imgs.length > 0) chosen = imgs[0];
    if (!chosen) { setTimeout(detectMode, 500); return; }
    const apply = () => {
      const w = chosen.naturalWidth, h = chosen.naturalHeight;
      if (w && h) {
        const ratio = w / h;
        if (ratio > 1.25) document.body.classList.add('tx-landscape');
        else document.body.classList.remove('tx-landscape');
      }
    };
    if (chosen.complete && chosen.naturalWidth) apply();
    else chosen.addEventListener('load', apply, { once: true });
    setTimeout(apply, 1000);
    setTimeout(apply, 2500);
  }

  // ==================== 自动加载更多 ====================
  function autoFill() {
    const sl = document.querySelector('.screen-list');
    if (!sl) return;
    const tryScroll = () => {
      if (sl.scrollHeight <= sl.clientHeight + 100) {
        sl.scrollTop = sl.scrollHeight;
        setTimeout(tryScroll, 1200);
      }
    };
    setTimeout(tryScroll, 900);
  }

  // ==================== 兜底：干掉贴底的 fixed 浮层 ====================
  function killBottomOverlays() {
    const vh = window.innerHeight;
    const vw = window.innerWidth;
    document.querySelectorAll('body *').forEach(el => {
      if (el.id === 'tx-header') return;
      if (el.closest && (el.closest('#tx-header') || el.closest('.tx-filter-modal'))) return;
      let cs; try { cs = getComputedStyle(el); } catch (e) { return; }
      if (cs.position !== 'fixed') return;
      const r = el.getBoundingClientRect();
      if (r.height < 20 || r.height > vh * 0.5) return;
      if (r.width < vw * 0.6) return;
      if (r.bottom >= vh - 8 && r.top > vh * 0.5) {
        el.style.setProperty('display', 'none', 'important');
      }
    });
  }

  // ==================== ★ 弹窗是否打开 ====================
  function isModalOpen() {
    const m = document.querySelector('.tx-filter-modal');
    return !!(m && m.style.display !== 'none');
  }

  // ==================== 筛选：标签栏（在 header 里）+ 居中弹窗 ====================
  function buildFilterUI(force) {
    // ★ 弹窗打开时跳过重建，避免自动刷新把用户刚点开的弹窗关掉
    if (!force && isModalOpen()) return;

    const sl = document.querySelector('.screen-list');
    if (!sl) return;
    const lines = document.querySelectorAll('.filter-line');
    if (!lines.length) return;

    // 保留当前激活
    const prev = document.querySelector('.tx-tab.tx-active');
    if (prev) state.activeTab = prev.textContent;

    // 清旧
    document.querySelectorAll('.tx-filter-tabs, .tx-filter-modal').forEach(el => el.remove());

    // 标签栏
    const tabs = document.createElement('div');
    tabs.className = 'tx-filter-tabs';

    // 弹窗
    const modal = document.createElement('div');
    modal.className = 'tx-filter-modal';
    modal.style.display = 'none';
    modal.innerHTML = '<div class="tx-filter-mask"></div><div class="tx-filter-panel"></div>';
    document.body.appendChild(modal);

    const panel = modal.querySelector('.tx-filter-panel');
    modal.querySelector('.tx-filter-mask').addEventListener('click', () => {
      modal.style.display = 'none';
    });

    lines.forEach(line => {
      const col = line.querySelector(':scope > .filter-column');
      if (!col) return;
      const label = col.textContent.trim();
      const opts = line.querySelectorAll(':scope > .lazy-list__content .filter');

      const tab = document.createElement('button');
      tab.className = 'tx-tab';
      tab.textContent = label;

      tab.addEventListener('click', () => {
        document.querySelectorAll('.tx-tab').forEach(t => t.classList.remove('tx-active'));
        tab.classList.add('tx-active');
        state.activeTab = label;

        panel.innerHTML = '<div class="tx-modal-title">' + label + '</div>';
        opts.forEach(opt => {
          const b = document.createElement('button');
          const isSel = opt.classList.contains('filter--selected') ||
                        opt.classList.contains('filter--selected--dark');
          b.className = 'tx-opt' + (isSel ? ' sel' : '');
          b.textContent = opt.textContent.trim();

          b.addEventListener('click', () => {
            const want = b.textContent.trim();
            let clicked = false;
            document.querySelectorAll('.filter-line').forEach(freshLine => {
              const freshCol = freshLine.querySelector(':scope > .filter-column');
              if (!freshCol || freshCol.textContent.trim() !== label) return;
              freshLine.querySelectorAll(':scope > .lazy-list__content .filter').forEach(f => {
                if (f.textContent.trim() === want) { f.click(); clicked = true; }
              });
            });
            if (!clicked) { try { opt.click(); } catch (e) {} }

            modal.style.display = 'none';   // 先关，再重建

            // 此时 isModalOpen() === false，force 也可不传
            setTimeout(buildFilterUI, 60);
            setTimeout(buildFilterUI, 400);
            setTimeout(buildFilterUI, 1200);
          });

          panel.appendChild(b);
        });

        modal.style.display = 'block';
      });

      tabs.appendChild(tab);
    });

    if (state.activeTab) {
      const target = [...tabs.querySelectorAll('.tx-tab')]
        .find(t => t.textContent === state.activeTab);
      if (target) target.classList.add('tx-active');
    }

    // 放到 #tx-header 里
    const header = document.getElementById('tx-header');
    if (header) header.appendChild(tabs);
    else sl.insertBefore(tabs, sl.firstChild);
  }

  // ==================== 启动 ====================
  function boot() {
    injectCSS();
    injectPanels();
    buildHeader();
    detectMode();
    autoFill();
    killBottomOverlays();

    // 等展开按钮出现后点它，再等筛选 DOM 加载完建 UI
    function waitAndExpand() {
      const expand = document.querySelector('.filter-expand');
      if (expand) {
        expand.click();
        setTimeout(() => buildFilterUI(true), 1200);
      } else {
        setTimeout(waitAndExpand, 300);
      }
    }
    waitAndExpand();
    setTimeout(buildHeader, 1500);
    setTimeout(() => { detectMode(); autoFill(); killBottomOverlays(); }, 3000);
    setTimeout(killBottomOverlays, 5000);

    if (!window._txObserver) {
      const mo = new MutationObserver(() => {
        const main = document.querySelector('.screen-page__main-content') ||
                     document.querySelector('.screen-page') ||
                     document.getElementById('app-root');
        if (main && !document.getElementById('tx-header')) buildHeader();
        // 只在筛选栏完全消失时重建（选完筛选后原站重渲染）
        if (!isModalOpen() && document.querySelector('.filter-line') && !document.querySelector('.tx-filter-tabs')) {
          setTimeout(() => { try { buildFilterUI(); } catch(e){} }, 300);
        }
      });
      mo.observe(document.body, { childList: true, subtree: true });
      window._txObserver = mo;
    }
  }

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