/* roulang page: index */
:root {
      --blue: #2563eb;
      --blue-dark: #1d4ed8;
      --blue-soft: #eff6ff;
      --cyan: #06b6d4;
      --ink: #0f172a;
      --text: #334155;
      --muted: #64748b;
      --line: #e2e8f0;
      --page: #f8fafc;
      --white: #ffffff;
      --radius-lg: 24px;
      --radius-md: 18px;
      --shadow: 0 18px 45px rgba(15, 23, 42, .08);
      --shadow-sm: 0 8px 24px rgba(15, 23, 42, .06);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--text);
      background: var(--page);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.7;
      letter-spacing: 0;
    }
    a { color: inherit; text-decoration: none; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    img { max-width: 100%; display: block; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .section { padding: 104px 0; }
    .section-blue { background: #f1f7ff; }
    .section-head { max-width: 650px; margin-bottom: 42px; }
    .eyebrow, .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--blue);
      background: var(--blue-soft);
      border: 1px solid #dbeafe;
      border-radius: 999px;
      padding: 6px 12px;
      font-size: 13px;
      font-weight: 700;
      line-height: 1.2;
    }
    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--cyan);
      box-shadow: 0 0 0 4px #cffafe;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1, h2, h3 { color: var(--ink); line-height: 1.2; }
    h1 { font-size: clamp(38px, 5vw, 62px); letter-spacing: 0; margin-bottom: 24px; }
    h2 { font-size: clamp(30px, 4vw, 42px); margin-bottom: 15px; }
    h3 { font-size: 20px; margin-bottom: 9px; }
    .section-head p { color: var(--muted); margin-bottom: 0; max-width: 590px; }
    .dock-wrap {
      position: fixed;
      top: 20px;
      left: 0;
      right: 0;
      z-index: 50;
      pointer-events: none;
    }
    .dock {
      pointer-events: auto;
      width: min(1180px, calc(100% - 40px));
      min-height: 68px;
      margin: 0 auto;
      padding: 10px 14px 10px 22px;
      display: flex;
      align-items: center;
      gap: 22px;
      border: 1px solid rgba(226,232,240,.95);
      border-radius: 999px;
      background: rgba(255,255,255,.92);
      box-shadow: 0 12px 32px rgba(15,23,42,.10);
      backdrop-filter: blur(14px);
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: var(--ink);
      font-weight: 800;
      white-space: nowrap;
      letter-spacing: 0;
    }
    .brand-mark {
      width: 35px;
      height: 35px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: #fff;
      background: var(--blue);
      font-size: 16px;
      box-shadow: 0 7px 16px rgba(37,99,235,.25);
    }
    .nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
    .nav-links a {
      padding: 10px 13px;
      border-radius: 999px;
      color: var(--muted);
      font-size: 14px;
      transition: .2s ease;
    }
    .nav-links a:hover, .nav-links a.active { color: var(--blue); background: var(--blue-soft); }
    .nav-actions { display: flex; align-items: center; gap: 9px; }
    .search {
      width: 170px;
      height: 40px;
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0 13px;
      border: 1px solid var(--line);
      border-radius: 999px;
      color: var(--muted);
      background: #fff;
    }
    .search input { width: 100%; border: 0; outline: 0; color: var(--ink); font-size: 13px; background: transparent; }
    .search:focus-within { border-color: #93c5fd; box-shadow: 0 0 0 4px #dbeafe; }
    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 11px 19px;
      border: 1px solid transparent;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .btn-primary { color: #fff; background: var(--blue); box-shadow: 0 8px 18px rgba(37,99,235,.2); }
    .btn-primary:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: 0 12px 22px rgba(37,99,235,.28); }
    .btn-secondary { color: var(--blue); border-color: #bfdbfe; background: #fff; }
    .btn-secondary:hover { background: var(--blue-soft); transform: translateY(-2px); }
    .menu-btn { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 50%; color: var(--ink); background: #fff; }
    .mobile-menu { display: none; }
    .hero {
      min-height: 780px;
      display: flex;
      align-items: center;
      padding: 150px 0 90px;
      background:
        linear-gradient(90deg, rgba(239,246,255,.98), rgba(248,250,252,.86)),
        repeating-linear-gradient(0deg, transparent 0 39px, rgba(37,99,235,.045) 40px),
        repeating-linear-gradient(90deg, transparent 0 39px, rgba(37,99,235,.045) 40px);
    }
    .hero-grid { display: grid; grid-template-columns: .92fr 1.08fr; align-items: center; gap: 70px; }
    .hero-copy { max-width: 570px; }
    .hero-copy p { max-width: 535px; color: var(--muted); font-size: 18px; margin-bottom: 28px; }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 30px; }
    .stat-row { display: flex; flex-wrap: wrap; gap: 24px; }
    .stat { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 13px; }
    .stat strong { color: var(--ink); font-size: 20px; }
    .preview-stage { position: relative; min-height: 480px; }
    .preview-panel {
      position: absolute;
      inset: 20px 0 0 35px;
      padding: 25px;
      border: 1px solid var(--line);
      border-radius: 28px;
      background: #fff;
      box-shadow: var(--shadow);
    }
    .panel-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 23px; }
    .panel-title { color: var(--ink); font-size: 18px; font-weight: 800; }
    .live-dot { color: #059669; font-size: 12px; font-weight: 700; }
    .live-dot::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: #10b981; }
    .preview-item {
      display: grid;
      grid-template-columns: 74px 1fr auto;
      align-items: center;
      gap: 14px;
      padding: 13px 0;
      border-bottom: 1px solid #eef2f7;
    }
    .preview-item:last-child { border-bottom: 0; }
    .cover, .mini-cover {
      border-radius: 14px;
      background: linear-gradient(145deg, #bfdbfe, #dbeafe 53%, #cffafe);
    }
    .cover { width: 74px; height: 62px; }
    .preview-item h3 { margin: 0 0 3px; font-size: 15px; }
    .preview-item p { margin: 0; color: var(--muted); font-size: 12px; }
    .view-mark { color: var(--blue); font-size: 13px; white-space: nowrap; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin: 20px 0 0; }
    .tag { padding: 5px 10px; border-radius: 999px; color: #2563eb; background: #eff6ff; font-size: 12px; }
    .floating-index {
      position: absolute;
      left: 0;
      bottom: 16px;
      width: 175px;
      padding: 17px;
      border: 1px solid #dbeafe;
      border-radius: 20px;
      background: #f8fbff;
      box-shadow: var(--shadow-sm);
    }
    .floating-index strong { display: block; color: var(--ink); font-size: 25px; }
    .floating-index span { color: var(--muted); font-size: 12px; }
    .feature-layout { display: grid; grid-template-columns: 1.18fr .82fr; gap: 22px; }
    .feature-main, .feature-card, .scene-card, .case-main, .quote-card, .price-card, .faq-list details {
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }
    .feature-main { min-height: 330px; padding: 32px; border-radius: var(--radius-lg); background: #eaf3ff; }
    .feature-main .icon-box { width: 54px; height: 54px; }
    .feature-main p { max-width: 450px; color: var(--muted); }
    .icon-box {
      width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 22px;
      border-radius: 14px; color: var(--blue); background: #dbeafe; font-size: 21px; font-weight: 800;
    }
    .feature-side { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
    .feature-card { padding: 24px; border-radius: var(--radius-md); }
    .feature-card p { margin: 0; color: var(--muted); font-size: 14px; }
    .feature-card .icon-box { width: 38px; height: 38px; margin-bottom: 16px; font-size: 16px; }
    .status { display: inline-flex; margin-top: 18px; color: #047857; font-size: 12px; font-weight: 700; }
    .scene-layout { display: grid; grid-template-columns: 230px 1fr; gap: 40px; }
    .scene-tabs { display: flex; flex-direction: column; gap: 9px; }
    .scene-tab {
      padding: 15px 17px; border: 1px solid transparent; border-radius: 15px; color: var(--muted); background: transparent; text-align: left;
      transition: .2s ease;
    }
    .scene-tab:hover, .scene-tab.active { color: var(--blue); border-color: #bfdbfe; background: #fff; box-shadow: var(--shadow-sm); }
    .scene-card { padding: 30px; border-radius: var(--radius-lg); }
    .scene-card-header { display: flex; justify-content: space-between; align-items: start; gap: 20px; margin-bottom: 25px; }
    .step-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .step { padding: 19px; border-radius: 16px; background: #f8fafc; }
    .step-number { color: var(--blue); font-size: 13px; font-weight: 800; }
    .step p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1.45fr .55fr; gap: 22px; }
    .case-main { padding: 32px; border-radius: var(--radius-lg); background: #fff; }
    .case-main p { color: var(--muted); max-width: 650px; }
    .case-bar { height: 11px; margin: 24px 0 8px; border-radius: 20px; background: #dbeafe; overflow: hidden; }
    .case-bar span { display: block; width: 82%; height: 100%; border-radius: inherit; background: var(--blue); }
    .case-side { display: grid; gap: 22px; }
    .quote-card { padding: 24px; border-radius: var(--radius-md); }
    .quote-card strong { display: block; color: var(--ink); font-size: 25px; }
    .quote-card span { color: var(--muted); font-size: 13px; }
    .price-layout { display: grid; grid-template-columns: .75fr 1.25fr; align-items: stretch; gap: 24px; }
    .price-intro { padding: 30px 10px 30px 0; }
    .price-intro p { color: var(--muted); }
    .price-cards { display: grid; grid-template-columns: 1fr 1.12fr; gap: 18px; }
    .price-card { padding: 28px; border-radius: var(--radius-lg); }
    .price-card.featured { border: 2px solid #93c5fd; background: #f0f7ff; }
    .price-card h3 { margin-bottom: 4px; }
    .price { margin: 15px 0 18px; color: var(--ink); font-size: 32px; font-weight: 800; }
    .price small { color: var(--muted); font-size: 13px; font-weight: 400; }
    .benefits { margin: 0 0 24px; padding: 0; list-style: none; color: var(--muted); font-size: 14px; }
    .benefits li { margin: 9px 0; }
    .benefits li::before { content: "✓"; margin-right: 8px; color: #10b981; font-weight: 800; }
    .faq-list { display: grid; gap: 12px; max-width: 860px; }
    .faq-list details { border-radius: 16px; padding: 0 22px; }
    .faq-list summary { display: flex; align-items: center; justify-content: space-between; min-height: 65px; color: var(--ink); font-weight: 700; cursor: pointer; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; color: var(--blue); font-size: 24px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: -4px 35px 20px 0; color: var(--muted); font-size: 14px; }
    .cta-band { padding: 54px 0; background: var(--blue); color: #dbeafe; }
    .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
    .cta-inner h2 { margin-bottom: 10px; color: #fff; font-size: 32px; }
    .cta-inner p { margin: 0; max-width: 600px; }
    .cta-band .btn-secondary { border-color: #bfdbfe; }
    footer { padding: 60px 0 28px; background: #fff; border-top: 1px solid var(--line); }
    .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 45px; }
    .footer-copy { max-width: 330px; color: var(--muted); font-size: 14px; }
    .footer-title { margin-bottom: 14px; color: var(--ink); font-size: 14px; font-weight: 800; }
    .footer-links { display: grid; gap: 9px; color: var(--muted); font-size: 14px; }
    .footer-links a:hover { color: var(--blue); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
    :focus-visible { outline: 3px solid #93c5fd; outline-offset: 3px; }
    @media (max-width: 1024px) {
      .hero-grid, .feature-layout, .price-layout { grid-template-columns: 1fr; }
      .hero { min-height: auto; }
      .hero-copy { max-width: 720px; }
      .preview-stage { max-width: 720px; }
      .price-intro { padding: 0; }
      .nav-links { display: none; }
      .menu-btn { display: grid; place-items: center; }
      .nav-actions { margin-left: auto; }
      .mobile-menu.open { display: grid; position: absolute; top: 75px; left: 0; right: 0; padding: 12px; gap: 4px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
      .mobile-menu a { padding: 12px 14px; border-radius: 12px; color: var(--text); }
      .mobile-menu a:hover { color: var(--blue); background: var(--blue-soft); }
    }
    @media (max-width: 760px) {
      .container, .dock { width: min(100% - 28px, 620px); }
      .section { padding: 70px 0; }
      .dock { padding-left: 13px; gap: 10px; }
      .brand { font-size: 13px; }
      .brand-mark { width: 32px; height: 32px; }
      .search, .dock > .btn-primary { display: none; }
      .hero { padding: 125px 0 65px; }
      .hero-grid { gap: 38px; }
      .hero-copy p { font-size: 16px; }
      .preview-stage { min-height: 430px; }
      .preview-panel { inset: 12px 0 0 0; padding: 20px 16px; }
      .floating-index { left: 10px; bottom: 4px; }
      .feature-side, .price-cards, .step-list, .case-grid, .footer-grid { grid-template-columns: 1fr; }
      .feature-main, .case-main { padding: 24px; }
      .scene-layout { grid-template-columns: 1fr; gap: 18px; }
      .scene-tabs { flex-direction: row; overflow-x: auto; padding-bottom: 4px; }
      .scene-tab { min-width: 145px; white-space: nowrap; }
      .scene-card-header { display: block; }
      .scene-card-header .badge { margin-top: 12px; }
      .cta-inner, .footer-bottom { display: grid; }
    }
    @media (max-width: 520px) {
      h1 { font-size: 38px; }
      h2 { font-size: 30px; }
      .hero-buttons { display: grid; }
      .hero-buttons .btn { width: 100%; }
      .stat-row { gap: 15px; }
      .preview-item { grid-template-columns: 58px 1fr; }
      .cover { width: 58px; height: 54px; }
      .view-mark { grid-column: 2; }
      .price-card { padding: 23px; }
    }

/* roulang page: category2 */
:root{
      --blue:#2563eb;
      --blue-deep:#1d4ed8;
      --blue-soft:#eff6ff;
      --cyan:#06b6d4;
      --green:#10b981;
      --ink:#0f172a;
      --text:#334155;
      --muted:#64748b;
      --line:#e2e8f0;
      --paper:#ffffff;
      --wash:#f8fafc;
      --shadow:0 18px 45px rgba(15,23,42,.08);
      --small-shadow:0 8px 24px rgba(15,23,42,.06);
      --radius:22px;
      --container:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--wash);color:var(--text);font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.7;letter-spacing:0}
    a{text-decoration:none;color:inherit}
    button,input{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}
    .dock-wrap{position:relative;z-index:20;padding:20px 20px 0}
    .dock{position:relative;width:min(1180px,100%);margin:auto;display:flex;align-items:center;gap:24px;padding:12px 14px 12px 18px;background:rgba(255,255,255,.94);border:1px solid rgba(226,232,240,.9);border-radius:999px;box-shadow:0 12px 32px rgba(15,23,42,.09)}
    .brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;white-space:nowrap}
    .brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:11px;background:var(--blue);color:#fff;font-size:18px;box-shadow:0 6px 14px rgba(37,99,235,.25)}
    .nav-links{display:flex;align-items:center;gap:5px;flex:1}
    .nav-links a,.mobile-menu a{padding:9px 13px;color:var(--muted);font-size:14px;border-radius:999px;transition:.2s ease}
    .nav-links a:hover,.nav-links a.active,.mobile-menu a:hover{background:var(--blue-soft);color:var(--blue)}
    .nav-actions{display:flex;align-items:center;gap:10px}
    .search{display:flex;align-items:center;gap:7px;width:170px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--muted)}
    .search input{width:100%;border:0;outline:0;background:transparent;font-size:13px;color:var(--ink)}
    .search:focus-within{border-color:var(--blue);box-shadow:0 0 0 4px rgba(37,99,235,.1)}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:11px 18px;font-size:14px;font-weight:700;border:1px solid transparent;transition:.2s ease}
    .btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(37,99,235,.2)}
    .btn-primary:hover{background:var(--blue-deep);transform:translateY(-2px)}
    .btn-secondary{background:#fff;color:var(--blue);border-color:#bfdbfe}
    .btn-secondary:hover{background:var(--blue-soft);border-color:var(--blue)}
    .btn:focus-visible,.menu-btn:focus-visible,a:focus-visible{outline:3px solid rgba(37,99,235,.28);outline-offset:3px}
    .menu-btn{display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:50%;background:#fff;color:var(--ink)}
    .mobile-menu{display:none}
    .hero-band{padding:64px 0 68px;background:#edf6ff;border-bottom:1px solid #dbeafe}
    .crumbs{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:22px}
    .crumbs a:hover{color:var(--blue)}
    .hero-layout{display:grid;grid-template-columns:1fr 1.02fr;gap:64px;align-items:center}
    .eyebrow,.tag{display:inline-flex;align-items:center;gap:7px;border-radius:999px;color:var(--blue);background:#dbeafe;padding:6px 11px;font-size:12px;font-weight:700}
    .eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan)}
    h1,h2,h3{margin:0;color:var(--ink);line-height:1.2}
    h1{font-size:clamp(36px,5vw,58px);letter-spacing:0;font-weight:850;margin:18px 0}
    h2{font-size:clamp(29px,4vw,40px);font-weight:800}
    h3{font-size:20px;font-weight:750}
    .hero-copy{max-width:620px;font-size:17px;color:#526277}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
    .hero-stats{display:flex;gap:28px;margin-top:32px}
    .stat strong{display:block;color:var(--ink);font-size:23px}
    .stat span{font-size:13px;color:var(--muted)}
    .feature-board{display:grid;grid-template-columns:1fr 1fr;gap:14px}
    .topic-tile{min-height:145px;padding:22px;border:1px solid rgba(191,219,254,.85);border-radius:var(--radius);background:#fff;box-shadow:var(--small-shadow);transition:.22s ease}
    .topic-tile:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#93c5fd}
    .topic-tile.wide{grid-column:span 2;min-height:128px;background:#2563eb;color:#fff;border-color:#2563eb}
    .topic-tile.wide h3,.topic-tile.wide p{color:#fff}
    .topic-icon{display:grid;place-items:center;width:38px;height:38px;margin-bottom:17px;border-radius:12px;background:var(--blue-soft);color:var(--blue);font-size:19px}
    .topic-tile.wide .topic-icon{background:rgba(255,255,255,.18);color:#fff}
    .topic-tile p{margin:8px 0 0;color:var(--muted);font-size:14px;line-height:1.6}
    .section{padding:92px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:30px}
    .section-head p{max-width:470px;margin:0;color:var(--muted);font-size:15px}
    .filter-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-bottom:30px;padding:14px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:var(--small-shadow)}
    .filter-label{font-size:13px;color:var(--muted);font-weight:700;margin-right:4px}
    .filter{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:999px;padding:8px 14px;font-size:13px;transition:.2s ease}
    .filter:hover,.filter.active{border-color:#93c5fd;background:var(--blue-soft);color:var(--blue)}
    .content-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;align-items:start}
    .pick-list{display:grid;gap:16px}
    .pick-item{display:grid;grid-template-columns:190px 1fr;gap:23px;padding:18px;border:1px solid var(--line);border-radius:20px;background:#fff;box-shadow:var(--small-shadow);transition:.22s ease}
    .pick-item:hover{transform:translateY(-3px);border-color:#bfdbfe;box-shadow:var(--shadow)}
    .cover{min-height:150px;border-radius:15px;background:linear-gradient(135deg,#dbeafe 0%,#bfdbfe 48%,#cffafe 100%);position:relative;overflow:hidden}
    .cover:after{content:"精选";position:absolute;right:12px;bottom:11px;padding:4px 9px;border-radius:999px;background:rgba(255,255,255,.8);color:var(--blue);font-size:12px;font-weight:700}
    .cover.two{background:linear-gradient(135deg,#e0e7ff,#dbeafe 55%,#ccfbf1)}
    .cover.three{background:linear-gradient(135deg,#cffafe,#e0f2fe 55%,#dbeafe)}
    .pick-item p{margin:10px 0;color:var(--muted);font-size:14px;line-height:1.65}
    .meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:14px;color:var(--muted);font-size:12px}
    .meta .tag{padding:4px 9px;background:#ecfeff;color:#0e7490}
    .side-panel{padding:24px;border-radius:20px;background:#fff;border:1px solid var(--line);box-shadow:var(--small-shadow);position:sticky;top:24px}
    .side-panel h3{font-size:18px;margin-bottom:18px}
    .rank{display:flex;gap:13px;padding:15px 0;border-top:1px solid var(--line)}
    .rank:first-of-type{border-top:0;padding-top:0}
    .rank-num{color:var(--blue);font-weight:800;font-size:18px}
    .rank strong{display:block;color:var(--ink);font-size:14px}
    .rank span{color:var(--muted);font-size:12px}
    .strip{padding:24px 0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .strip-inner{display:flex;align-items:center;gap:18px;overflow:auto;white-space:nowrap}
    .strip-title{font-weight:800;color:var(--ink);padding-right:18px;border-right:1px solid var(--line)}
    .strip a{padding:9px 14px;border-radius:999px;background:var(--wash);color:var(--muted);font-size:13px;transition:.2s}
    .strip a:hover{background:var(--blue-soft);color:var(--blue)}
    .compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}
    .compare-card{padding:30px;border-radius:var(--radius);border:1px solid var(--line);background:#fff}
    .compare-card.featured{background:#f0f7ff;border-color:#93c5fd}
    .compare-card p{color:var(--muted);font-size:14px;margin:10px 0 22px}
    .compare-list{display:grid;gap:12px;margin:0 0 24px;padding:0;list-style:none}
    .compare-list li{display:flex;gap:9px;font-size:14px;color:#475569}
    .compare-list li:before{content:"✓";color:var(--green);font-weight:800}
    .faq{display:grid;gap:12px;max-width:840px}
    details{border:1px solid var(--line);border-radius:16px;background:#fff;padding:0 20px;box-shadow:var(--small-shadow)}
    summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:20px;padding:20px 0;color:var(--ink);font-weight:750}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"＋";color:var(--blue);font-size:20px;line-height:1}
    details[open] summary:after{content:"－"}
    details p{margin:0;padding:0 30px 20px 0;color:var(--muted);font-size:14px}
    .cta{padding:34px 0;background:#eaf3ff}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}
    .cta-inner p{margin:8px 0 0;color:var(--muted);font-size:15px}
    footer{padding:58px 0 24px;background:#fff;border-top:1px solid var(--line)}
    .footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:50px;padding-bottom:44px}
    .footer-copy{max-width:380px;color:var(--muted);font-size:14px}
    .footer-title{font-size:14px;color:var(--ink);font-weight:800;margin-bottom:14px}
    .footer-links{display:grid;gap:10px;color:var(--muted);font-size:14px}
    .footer-links a:hover{color:var(--blue)}
    .footer-bottom{display:flex;justify-content:space-between;gap:16px;padding-top:20px;border-top:1px solid var(--line);color:#94a3b8;font-size:12px}
    @media(max-width:1024px){
      .nav-links{display:none}.search{width:150px}.menu-btn{display:block}
      .mobile-menu{display:none;position:absolute;top:68px;left:10px;right:10px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)}
      .mobile-menu.open{display:grid}.mobile-menu a{border-radius:12px}
      .hero-layout{grid-template-columns:1fr;gap:40px}.hero-band{padding-top:48px}
      .content-layout{grid-template-columns:1fr}.side-panel{position:static}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,var(--container))}
      .dock-wrap{padding:12px 12px 0}.dock{padding:10px 11px 10px 14px;gap:10px}.brand{font-size:13px}.brand-mark{width:31px;height:31px;font-size:16px}
      .nav-actions{margin-left:auto}.nav-actions .btn{display:none}.search{width:40px;padding:9px;justify-content:center}.search input{display:none}
      .hero-band{padding:42px 0 50px}.hero-copy{font-size:16px}h1{font-size:38px}.hero-stats{gap:18px}
      .feature-board{gap:10px}.topic-tile{padding:18px;min-height:132px}.topic-tile.wide{min-height:116px}
      .section{padding:64px 0}.section-head{display:block}.section-head p{margin-top:12px}
      .filter-bar{flex-wrap:nowrap;overflow:auto;white-space:nowrap}.filter-label{display:none}
      .pick-item{grid-template-columns:1fr;gap:16px}.cover{min-height:135px}
      .compare{grid-template-columns:1fr}.cta-inner{display:block}.cta-inner .btn{margin-top:20px}
      .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:30px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:7px}
    }

/* roulang page: category1 */
:root {
      --blue: #2563eb;
      --blue-dark: #1d4ed8;
      --blue-soft: #eff6ff;
      --cyan: #06b6d4;
      --green: #10b981;
      --ink: #0f172a;
      --body: #334155;
      --muted: #64748b;
      --line: #e2e8f0;
      --page: #f8fafc;
      --white: #ffffff;
      --radius-lg: 24px;
      --radius-md: 18px;
      --shadow: 0 18px 45px rgba(15, 23, 42, .08);
      --shadow-sm: 0 8px 24px rgba(15, 23, 42, .06);
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--body);
      background: var(--page);
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      line-height: 1.75;
      letter-spacing: 0;
    }
    a { color: inherit; text-decoration: none; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .section { padding: 98px 0; }
    .section-soft { background: #f1f7ff; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--blue);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .04em;
    }
    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--cyan);
      box-shadow: 0 0 0 5px #cffafe;
    }
    h1, h2, h3, p { margin-top: 0; }
    h1, h2, h3 { color: var(--ink); line-height: 1.2; }
    h1 { font-size: clamp(36px, 5vw, 60px); margin-bottom: 22px; }
    h2 { font-size: clamp(30px, 4vw, 42px); margin-bottom: 16px; }
    h3 { font-size: 20px; margin-bottom: 8px; }
    .section-head { max-width: 650px; margin-bottom: 42px; }
    .section-head p, .hero-copy { color: var(--muted); font-size: 17px; }
    .btn {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      border-radius: 999px;
      padding: 11px 20px;
      font-size: 14px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:focus-visible, .filter-btn:focus-visible, input:focus-visible, summary:focus-visible {
      outline: 3px solid rgba(37, 99, 235, .22);
      outline-offset: 3px;
    }
    .btn-primary { color: white; background: var(--blue); box-shadow: 0 10px 22px rgba(37, 99, 235, .2); }
    .btn-primary:hover { background: var(--blue-dark); box-shadow: 0 14px 28px rgba(37, 99, 235, .28); }
    .btn-secondary { color: var(--blue); background: white; border-color: #bfdbfe; }
    .btn-secondary:hover { background: var(--blue-soft); border-color: #93c5fd; }
    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 27px;
      padding: 3px 10px;
      border-radius: 999px;
      color: #1d4ed8;
      background: #dbeafe;
      font-size: 12px;
      font-weight: 700;
      white-space: nowrap;
    }
    .tag-cyan { color: #0e7490; background: #cffafe; }
    .tag-green { color: #047857; background: #d1fae5; }

    .dock-wrap {
      position: fixed;
      z-index: 50;
      top: 20px;
      left: 0;
      right: 0;
      padding: 0 20px;
    }
    .dock {
      position: relative;
      width: min(1180px, 100%);
      min-height: 68px;
      margin: 0 auto;
      padding: 10px 12px 10px 20px;
      display: flex;
      align-items: center;
      gap: 24px;
      background: rgba(255,255,255,.92);
      border: 1px solid rgba(226,232,240,.95);
      border-radius: 22px;
      box-shadow: 0 12px 35px rgba(15,23,42,.1);
      backdrop-filter: blur(14px);
    }
    .brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 900; white-space: nowrap; }
    .brand-mark {
      width: 35px;
      height: 35px;
      display: grid;
      place-items: center;
      border-radius: 11px;
      color: white;
      background: var(--blue);
      font-size: 18px;
      box-shadow: 0 7px 16px rgba(37,99,235,.24);
    }
    .nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
    .nav-links a, .mobile-menu a {
      padding: 9px 13px;
      border-radius: 12px;
      color: var(--muted);
      font-size: 14px;
      font-weight: 700;
      transition: background .2s ease, color .2s ease;
    }
    .nav-links a:hover, .nav-links a.active, .mobile-menu a:hover, .mobile-menu a.active {
      color: var(--blue);
      background: var(--blue-soft);
    }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .search {
      display: flex;
      align-items: center;
      gap: 8px;
      width: 180px;
      padding: 8px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: #f8fafc;
      color: var(--muted);
    }
    .search input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 13px; }
    .search input::placeholder { color: #94a3b8; }
    .menu-btn { display: none; width: 42px; height: 42px; border: 0; border-radius: 13px; background: var(--blue-soft); color: var(--blue); }
    .mobile-menu { display: none; }

    .hero {
      padding: 170px 0 86px;
      background:
        linear-gradient(180deg, #eaf4ff 0%, #f8fbff 72%, var(--page) 100%);
      border-bottom: 1px solid #e5eef9;
    }
    .hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
    .hero-copy { max-width: 570px; margin-bottom: 28px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 30px; }
    .metrics { display: flex; gap: 28px; flex-wrap: wrap; }
    .metric strong { display: block; color: var(--ink); font-size: 22px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    .hero-panel {
      padding: 24px;
      border: 1px solid #dbeafe;
      border-radius: 28px;
      background: white;
      box-shadow: var(--shadow);
    }
    .panel-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
    .panel-title { color: var(--ink); font-weight: 900; }
    .live { color: #047857; font-size: 12px; font-weight: 800; }
    .live::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 50%; background: var(--green); }
    .preview-list { display: grid; gap: 11px; }
    .preview-item {
      display: grid;
      grid-template-columns: 45px 1fr auto;
      gap: 12px;
      align-items: center;
      padding: 12px;
      border: 1px solid #edf2f7;
      border-radius: 16px;
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    .preview-item:hover { transform: translateY(-2px); border-color: #bfdbfe; box-shadow: var(--shadow-sm); }
    .cover, .mini-cover {
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: white;
      font-weight: 900;
      background: linear-gradient(145deg, #60a5fa, #2563eb);
    }
    .cover { width: 45px; height: 45px; }
    .cover.cyan { background: linear-gradient(145deg, #67e8f9, #0891b2); }
    .cover.violet { background: linear-gradient(145deg, #a5b4fc, #6366f1); }
    .cover.green { background: linear-gradient(145deg, #6ee7b7, #059669); }
    .preview-item strong { display: block; color: var(--ink); font-size: 14px; }
    .preview-item small { color: var(--muted); font-size: 12px; }
    .preview-item time { color: #94a3b8; font-size: 11px; white-space: nowrap; }
    .hero-labels { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }

    .filter-bar {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px;
      margin-bottom: 34px;
      border: 1px solid var(--line);
      border-radius: 18px;
      background: white;
      box-shadow: var(--shadow-sm);
    }
    .filter-label { padding: 0 10px; color: var(--muted); font-size: 13px; font-weight: 800; }
    .filter-btn {
      border: 0;
      border-radius: 11px;
      padding: 9px 14px;
      color: var(--muted);
      background: transparent;
      font-size: 13px;
      font-weight: 800;
      transition: color .2s ease, background .2s ease;
    }
    .filter-btn:hover, .filter-btn.active { color: var(--blue); background: var(--blue-soft); }
    .content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 28px; align-items: start; }
    .feature-card {
      display: grid;
      grid-template-columns: 210px 1fr;
      min-height: 245px;
      overflow: hidden;
      border: 1px solid #dbeafe;
      border-radius: var(--radius-lg);
      background: white;
      box-shadow: var(--shadow);
      margin-bottom: 22px;
    }
    .feature-visual {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 24px;
      color: white;
      background: linear-gradient(145deg, #3b82f6, #06b6d4);
    }
    .feature-visual strong { font-size: 28px; line-height: 1.2; }
    .feature-visual span { font-size: 13px; opacity: .9; }
    .feature-body { padding: 28px; }
    .feature-body p { margin-bottom: 18px; color: var(--muted); font-size: 14px; }
    .card-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 14px; }
    .card-time { color: #94a3b8; font-size: 12px; }
    .grid-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
    .content-card, .side-card, .feedback-card, .price-card {
      border: 1px solid var(--line);
      border-radius: var(--radius-md);
      background: white;
      box-shadow: var(--shadow-sm);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .content-card:hover, .side-card:hover, .feedback-card:hover, .price-card:hover {
      transform: translateY(-3px);
      border-color: #bfdbfe;
      box-shadow: var(--shadow);
    }
    .content-card { overflow: hidden; }
    .mini-cover { height: 112px; border-radius: 0; font-size: 25px; }
    .content-card-body { padding: 20px; }
    .content-card p { min-height: 50px; margin-bottom: 15px; color: var(--muted); font-size: 13px; }
    .side-column { display: grid; gap: 20px; }
    .side-card { padding: 23px; }
    .side-card h3 { font-size: 18px; }
    .side-list { display: grid; gap: 14px; margin: 18px 0 0; padding: 0; list-style: none; }
    .side-list li { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid #eef2f7; font-size: 13px; }
    .side-list li:last-child { padding-bottom: 0; border-bottom: 0; }
    .side-list span:last-child { color: var(--muted); white-space: nowrap; }

    .topic-strip { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 20px; }
    .topic-card { min-height: 170px; padding: 25px; border-radius: var(--radius-md); color: white; background: #2563eb; }
    .topic-card:nth-child(2) { background: #0891b2; }
    .topic-card:nth-child(3) { background: #4f46e5; }
    .topic-card h3 { color: white; margin-bottom: 10px; }
    .topic-card p { margin-bottom: 17px; color: rgba(255,255,255,.82); font-size: 14px; }
    .topic-card a { font-size: 13px; font-weight: 800; }

    .faq-list { max-width: 820px; display: grid; gap: 12px; }
    details { padding: 0 22px; border: 1px solid var(--line); border-radius: 16px; background: white; box-shadow: var(--shadow-sm); }
    summary { display: flex; justify-content: space-between; gap: 20px; padding: 19px 0; color: var(--ink); cursor: pointer; font-weight: 800; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--blue); font-size: 22px; font-weight: 500; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 700px; padding: 0 30px 20px 0; margin: 0; color: var(--muted); font-size: 14px; }

    .cta-band { padding: 70px 0; background: #eaf4ff; border-top: 1px solid #dbeafe; border-bottom: 1px solid #dbeafe; }
    .cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
    .cta-inner h2 { margin-bottom: 8px; }
    .cta-inner p { margin: 0; color: var(--muted); }

    footer { padding: 66px 0 24px; background: white; }
    .footer-grid { display: grid; grid-template-columns: 1.7fr 1fr 1fr; gap: 50px; padding-bottom: 44px; }
    .footer-copy { max-width: 420px; color: var(--muted); font-size: 14px; }
    .footer-title { margin-bottom: 15px; color: var(--ink); font-size: 14px; font-weight: 900; }
    .footer-links { display: grid; gap: 9px; color: var(--muted); font-size: 14px; }
    .footer-links a { transition: color .2s ease; }
    .footer-links a:hover { color: var(--blue); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 18px; padding-top: 20px; border-top: 1px solid var(--line); color: #94a3b8; font-size: 12px; }

    @media (max-width: 1024px) {
      .nav-links { gap: 0; }
      .search { width: 145px; }
      .hero-grid { gap: 36px; }
      .content-layout { grid-template-columns: 1fr; }
      .side-column { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .container { width: min(100% - 32px, 620px); }
      .section { padding: 70px 0; }
      .dock-wrap { top: 12px; padding: 0 12px; }
      .dock { min-height: 60px; padding: 9px 10px 9px 14px; border-radius: 18px; }
      .brand { font-size: 13px; }
      .brand-mark { width: 32px; height: 32px; font-size: 16px; }
      .nav-links, .nav-actions > .search, .nav-actions > .btn { display: none; }
      .nav-actions { margin-left: auto; }
      .menu-btn { display: block; }
      .mobile-menu {
        position: absolute;
        top: calc(100% + 10px);
        left: 0;
        right: 0;
        padding: 12px;
        border: 1px solid var(--line);
        border-radius: 20px;
        background: white;
        box-shadow: var(--shadow);
      }
      .mobile-menu.open { display: grid; }
      .mobile-menu a { padding: 12px 14px; }
      .hero { padding: 128px 0 66px; }
      .hero-grid { grid-template-columns: 1fr; gap: 38px; }
      .hero-panel { padding: 18px; }
      .feature-card { grid-template-columns: 1fr; }
      .feature-visual { min-height: 150px; }
      .topic-strip { grid-template-columns: 1fr; }
      .cta-inner { align-items: flex-start; flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
      .footer-grid > div:first-child { grid-column: 1 / -1; }
    }
    @media (max-width: 520px) {
      h1 { font-size: 37px; }
      .hero-copy, .section-head p { font-size: 15px; }
      .metrics { gap: 17px; }
      .filter-bar { align-items: flex-start; overflow-x: auto; padding: 9px; }
      .filter-label { display: none; }
      .filter-btn { flex: 0 0 auto; }
      .grid-cards, .side-column { grid-template-columns: 1fr; }
      .feature-body { padding: 21px; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-grid > div:first-child { grid-column: auto; }
      .footer-bottom { align-items: flex-start; flex-direction: column; }
    }