/* roulang page: index */
:root {
      --ink: #182538;
      --muted: #657387;
      --blue: #2257a6;
      --blue-deep: #163b73;
      --blue-soft: #eaf2ff;
      --cyan: #52bfd0;
      --coral: #e88873;
      --surface: #ffffff;
      --page: #f5f8fc;
      --line: #e3eaf2;
      --radius: 12px;
      --shadow: 0 12px 32px rgba(33, 61, 98, .08);
      --shadow-hover: 0 18px 38px rgba(33, 61, 98, .14);
    }
    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0; color: var(--ink); background: var(--page);
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      font-size: 15px; line-height: 1.7; -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
      outline: 3px solid rgba(82, 191, 208, .5); outline-offset: 3px;
    }
    .container { max-width: 1200px; }
    .site-header {
      position: sticky; top: 0; z-index: 1000; background: rgba(255,255,255,.94);
      border-bottom: 1px solid rgba(220,229,239,.9); backdrop-filter: blur(14px);
    }
    .nav-shell { min-height: 72px; display: flex; align-items: center; gap: 28px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; min-width: 0; font-weight: 800; }
    .brand-mark {
      width: 38px; height: 38px; display: grid; place-items: center; flex: 0 0 auto;
      border-radius: 10px; color: white; background: var(--blue); font-size: 16px;
      box-shadow: 0 5px 14px rgba(34,87,166,.22);
    }
    .brand-name { font-size: 15px; line-height: 1.35; max-width: 255px; }
    .nav-links { display: flex; align-items: center; gap: 5px; margin-left: auto; }
    .nav-links a {
      padding: 9px 12px; border-radius: 8px; color: #536176; font-size: 14px;
      transition: color .2s ease, background .2s ease;
    }
    .nav-links a:hover, .nav-links a.active { color: var(--blue); background: var(--blue-soft); }
    .nav-search {
      width: 184px; display: flex; align-items: center; border: 1px solid var(--line);
      border-radius: 9px; background: #f9fbfd; padding: 0 11px; transition: border-color .2s, box-shadow .2s;
    }
    .nav-search:focus-within { border-color: #8eb1e4; box-shadow: 0 0 0 3px rgba(34,87,166,.09); }
    .nav-search input { width: 100%; min-width: 0; border: 0; outline: 0; background: transparent; padding: 9px 0; color: var(--ink); font-size: 13px; }
    .nav-search input::placeholder { color: #8a96a6; }
    .menu-toggle {
      display: none; width: 42px; height: 42px; border: 1px solid var(--line);
      border-radius: 9px; background: #fff; color: var(--ink);
    }
    .hero {
      position: relative; overflow: hidden; min-height: 506px; display: flex; align-items: center;
      color: white; background: #183e72;
      background-image: linear-gradient(90deg, rgba(16,42,78,.88) 0%, rgba(23,57,101,.72) 46%, rgba(23,57,101,.18) 100%),
        url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=2000&q=85");
      background-size: cover; background-position: center 43%;
    }
    .hero::after {
      content: ""; position: absolute; inset: auto 0 0; height: 80px;
      background: linear-gradient(transparent, rgba(12,31,57,.24)); pointer-events: none;
    }
    .hero-content { position: relative; z-index: 1; max-width: 780px; padding: 68px 0 78px; }
    .hero-kicker { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 16px; color: #cde6ff; font-size: 13px; font-weight: 700; }
    .hero-kicker::before { content: ""; width: 23px; height: 2px; background: var(--cyan); }
    .hero h1 { max-width: 760px; margin: 0 0 16px; font-size: clamp(34px, 4.4vw, 54px); line-height: 1.2; font-weight: 800; }
    .hero h1 span { color: #71d5dd; }
    .hero-subtitle { margin: 0 0 13px; color: #e2edf9; font-size: 19px; font-weight: 600; }
    .hero-copy { max-width: 730px; margin: 0; color: rgba(240,247,255,.86); font-size: 15px; line-height: 1.95; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; margin-top: 25px; }
    .btn-main, .btn-ghost {
      min-height: 45px; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
      padding: 10px 19px; border-radius: 8px; border: 1px solid transparent; font-weight: 700;
      transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
    }
    .btn-main { color: #17365e; background: #fff; box-shadow: 0 7px 18px rgba(0,0,0,.12); }
    .btn-main:hover { color: #17365e; transform: translateY(-2px); box-shadow: 0 11px 24px rgba(0,0,0,.2); }
    .btn-ghost { color: white; border-color: rgba(255,255,255,.5); background: rgba(255,255,255,.08); }
    .btn-ghost:hover { color: white; border-color: white; background: rgba(255,255,255,.16); }
    .hero-meta { display: flex; flex-wrap: wrap; gap: 22px; margin-top: 28px; color: #d6e5f7; font-size: 13px; }
    .hero-meta strong { color: white; font-size: 16px; margin-right: 5px; }
    .hero-search {
      margin-top: 27px; max-width: 620px; display: flex; gap: 8px; padding: 6px;
      border: 1px solid rgba(255,255,255,.37); border-radius: 10px; background: rgba(255,255,255,.12);
      backdrop-filter: blur(8px);
    }
    .hero-search input { flex: 1; min-width: 0; padding: 10px 12px; color: white; border: 0; outline: 0; background: transparent; }
    .hero-search input::placeholder { color: rgba(255,255,255,.75); }
    .hero-search button { border: 0; border-radius: 7px; padding: 9px 17px; color: var(--blue-deep); background: white; font-weight: 700; }
    .hero-search button:hover { background: #eaf3ff; }
    main section { padding: 74px 0; }
    main section.section-compact { padding: 58px 0; }
    main section.section-white { background: var(--surface); }
    main section.section-tint { background: #edf4fb; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
    .section-heading h2 { margin: 0; font-size: 28px; line-height: 1.35; font-weight: 800; }
    .section-heading p { max-width: 680px; margin: 9px 0 0; color: var(--muted); font-size: 14px; }
    .eyebrow { display: block; margin-bottom: 7px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .08em; }
    .text-link { color: var(--blue); font-size: 14px; font-weight: 700; white-space: nowrap; }
    .text-link:hover { color: var(--blue-deep); }
    .metric-band { position: relative; z-index: 2; margin-top: -30px; }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-radius: var(--radius); background: white; box-shadow: var(--shadow); }
    .metric { padding: 23px 26px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--blue); font-size: 27px; line-height: 1.2; font-weight: 800; }
    .metric span { display: block; margin-top: 5px; color: var(--muted); font-size: 13px; }
    .feature-strip { margin-top: 28px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
    .feature-item { display: flex; gap: 14px; padding: 19px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
    .feature-icon { width: 38px; height: 38px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 9px; color: var(--blue); background: var(--blue-soft); font-weight: 800; }
    .feature-item h3 { margin: 0 0 4px; font-size: 15px; font-weight: 800; }
    .feature-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
    .poster-grid { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 20px 15px; }
    .poster-card { min-width: 0; }
    .poster-frame { position: relative; overflow: hidden; aspect-ratio: 2 / 2.8; border-radius: 9px; background: #dce5ef; box-shadow: 0 7px 20px rgba(32,56,88,.12); }
    .poster-frame img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
    .poster-card:hover .poster-frame img { transform: scale(1.045); }
    .poster-frame::after { content: ""; position: absolute; inset: 42% 0 0; background: linear-gradient(transparent, rgba(10,22,39,.63)); pointer-events: none; }
    .poster-badge { position: absolute; z-index: 1; top: 9px; left: 9px; padding: 4px 7px; border-radius: 5px; color: white; background: rgba(24,54,92,.84); font-size: 10px; font-weight: 800; }
    .poster-rating { position: absolute; z-index: 1; right: 9px; bottom: 9px; color: #fff; font-size: 12px; font-weight: 800; }
    .poster-info { padding: 10px 1px 0; }
    .poster-info h3 { overflow: hidden; margin: 0; font-size: 14px; font-weight: 800; text-overflow: ellipsis; white-space: nowrap; }
    .poster-info p { margin: 3px 0 0; color: var(--muted); font-size: 12px; }
    .recommend-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .recommend-card { min-height: 156px; position: relative; overflow: hidden; display: flex; align-items: end; padding: 19px; border-radius: 10px; color: white; background: #345d82; isolation: isolate; }
    .recommend-card img { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
    .recommend-card::after { content: ""; position: absolute; z-index: -1; inset: 0; background: linear-gradient(0deg, rgba(10,24,42,.83), rgba(10,24,42,.08) 80%); }
    .recommend-card:hover img { transform: scale(1.04); }
    .recommend-card h3 { margin: 0 0 4px; font-size: 17px; font-weight: 800; }
    .recommend-card p { margin: 0; color: rgba(255,255,255,.82); font-size: 12px; }
    .category-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .category-item { min-height: 154px; padding: 19px 17px; border: 1px solid var(--line); border-radius: 10px; background: #fff; transition: transform .2s, box-shadow .2s, border-color .2s; }
    .category-item:hover { transform: translateY(-3px); border-color: #b9cdea; box-shadow: var(--shadow); }
    .category-no { color: #91a1b5; font-size: 11px; font-weight: 800; }
    .category-item h3 { margin: 8px 0 6px; color: var(--blue-deep); font-size: 17px; font-weight: 800; }
    .category-item p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
    .ranking-wrap { display: grid; grid-template-columns: 1.25fr .75fr; gap: 28px; align-items: start; }
    .ranking-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
    .rank-row { display: grid; grid-template-columns: 34px minmax(0,1fr) 88px 55px 65px; align-items: center; gap: 12px; min-height: 59px; border-bottom: 1px solid var(--line); }
    .rank-number { color: #8392a5; font-size: 14px; font-weight: 800; }
    .rank-row:nth-child(-n+3) .rank-number { color: var(--coral); }
    .rank-title { overflow: hidden; font-weight: 700; text-overflow: ellipsis; white-space: nowrap; }
    .rank-muted { color: var(--muted); font-size: 12px; }
    .rank-tag { justify-self: start; padding: 3px 7px; border-radius: 5px; color: var(--blue); background: var(--blue-soft); font-size: 11px; }
    .ranking-aside { padding: 23px; border-radius: 10px; color: #fff; background: var(--blue-deep); }
    .ranking-aside h3 { margin: 0 0 10px; font-size: 19px; font-weight: 800; }
    .ranking-aside p { margin: 0; color: rgba(255,255,255,.76); font-size: 13px; }
    .trend-row { display: flex; justify-content: space-between; gap: 14px; padding: 13px 0; border-top: 1px solid rgba(255,255,255,.18); color: #eef5ff; font-size: 13px; }
    .trend-row:first-of-type { margin-top: 18px; }
    .trend-row strong { color: #82d9de; }
    .editorial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .editorial-card { overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #fff; transition: transform .2s, box-shadow .2s; }
    .editorial-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
    .editorial-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .editorial-body { padding: 15px 16px 17px; }
    .editorial-date { color: var(--blue); font-size: 11px; font-weight: 800; }
    .editorial-body h3 { margin: 6px 0; font-size: 15px; line-height: 1.5; font-weight: 800; }
    .editorial-body p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
    .timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .timeline-step { position: relative; padding: 0 24px 0 0; }
    .timeline-step:not(:last-child)::after { content: ""; position: absolute; top: 17px; left: 45px; right: 10px; height: 1px; background: #cbd8e6; }
    .timeline-index { position: relative; z-index: 1; width: 35px; height: 35px; display: grid; place-items: center; border: 1px solid #b8cce4; border-radius: 50%; color: var(--blue); background: white; font-weight: 800; }
    .timeline-step h3 { margin: 13px 0 5px; font-size: 15px; font-weight: 800; }
    .timeline-step p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.75; }
    .partner-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .partner-item { display: flex; align-items: center; justify-content: center; min-height: 74px; padding: 12px; border: 1px solid var(--line); border-radius: 8px; background: white; color: #64758a; font-weight: 800; font-size: 13px; text-align: center; }
    .quotes-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .quote-item { padding: 20px; border-left: 3px solid var(--cyan); background: #fff; box-shadow: 0 5px 18px rgba(33,61,98,.05); }
    .quote-item p { margin: 0 0 12px; color: #536176; font-size: 13px; }
    .quote-item strong { color: var(--ink); font-size: 12px; }
    .faq-list { max-width: 900px; margin: 0 auto; }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 18px 36px 18px 0; cursor: pointer; list-style: none; font-weight: 800; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 2px; top: 14px; color: var(--blue); font-size: 22px; font-weight: 500; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 820px; margin: -2px 0 18px; color: var(--muted); font-size: 14px; }
    .contact-band { padding: 34px; display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; border-radius: 12px; color: #fff; background: var(--blue-deep); }
    .contact-band h2 { margin: 0 0 8px; font-size: 25px; font-weight: 800; }
    .contact-band p { max-width: 520px; margin: 0; color: rgba(255,255,255,.75); font-size: 14px; }
    .contact-form { display: flex; gap: 8px; }
    .contact-form input { min-width: 0; flex: 1; padding: 11px 13px; border: 1px solid rgba(255,255,255,.28); border-radius: 7px; background: rgba(255,255,255,.1); color: white; }
    .contact-form input::placeholder { color: rgba(255,255,255,.66); }
    .contact-form button { padding: 10px 16px; border: 0; border-radius: 7px; color: var(--blue-deep); background: white; font-weight: 800; }
    .contact-note { margin-top: 8px; color: rgba(255,255,255,.65); font-size: 11px; }
    .site-footer { padding: 52px 0 22px; color: #dce7f4; background: #142b49; }
    .footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 35px; }
    .footer-brand { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 13px; color: #fff; font-weight: 800; }
    .footer-brand .brand-mark { width: 34px; height: 34px; border-radius: 8px; background: #2d65aa; }
    .footer-about { max-width: 320px; margin: 0; color: #aabbd0; font-size: 12px; line-height: 1.8; }
    .footer-col h3 { margin: 3px 0 12px; color: #fff; font-size: 13px; font-weight: 800; }
    .footer-col a { display: block; width: fit-content; margin: 7px 0; color: #aabbd0; font-size: 12px; transition: color .2s; }
    .footer-col a:hover { color: white; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 16px; margin-top: 36px; padding-top: 17px; border-top: 1px solid rgba(255,255,255,.13); color: #91a5bd; font-size: 11px; }
    .notice { margin-top: 20px; padding: 14px 16px; border: 1px solid rgba(255,255,255,.14); border-radius: 8px; color: #aabbd0; font-size: 11px; }
    .notice strong { color: #e9f2ff; }
    @media (max-width: 1024px) {
      .nav-shell { gap: 15px; }
      .nav-search { width: 150px; }
      .nav-links a { padding: 8px 9px; }
      .poster-grid { grid-template-columns: repeat(4, minmax(0,1fr)); }
      .category-grid { grid-template-columns: repeat(3, 1fr); }
      .ranking-wrap { grid-template-columns: 1fr .7fr; gap: 18px; }
      .footer-grid { grid-template-columns: 1.3fr 1fr 1fr; }
      .footer-col:last-child { display: none; }
    }
    @media (max-width: 768px) {
      .nav-shell { min-height: 64px; flex-wrap: wrap; }
      .brand-name { max-width: 220px; font-size: 14px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-links {
        display: none; order: 3; width: 100%; margin: 0; padding: 0 0 12px;
        flex-wrap: wrap; gap: 4px; border-top: 1px solid var(--line);
      }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 11px; }
      .nav-search { display: none; }
      .hero { min-height: 490px; background-position: 58% center; }
      .hero-content { padding: 58px 0 70px; }
      .hero h1 { font-size: 40px; }
      main section { padding: 58px 0; }
      .metric-grid { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .feature-strip { grid-template-columns: 1fr; }
      .poster-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
      .recommend-grid { grid-template-columns: repeat(2, 1fr); }
      .category-grid { grid-template-columns: repeat(2, 1fr); }
      .ranking-wrap { grid-template-columns: 1fr; }
      .editorial-grid { grid-template-columns: repeat(2, 1fr); }
      .timeline { grid-template-columns: repeat(2, 1fr); row-gap: 25px; }
      .timeline-step:nth-child(2)::after { display: none; }
      .partner-row { grid-template-columns: repeat(3, 1fr); }
      .quotes-grid { grid-template-columns: 1fr; }
      .contact-band { grid-template-columns: 1fr; padding: 27px; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .footer-col:last-child { display: block; }
    }
    @media (max-width: 520px) {
      .container { padding-left: 18px; padding-right: 18px; }
      .brand-name { max-width: 205px; font-size: 13px; }
      .hero { min-height: 540px; background-position: 62% center; }
      .hero-content { padding: 53px 0 65px; }
      .hero h1 { font-size: 34px; }
      .hero-subtitle { font-size: 16px; }
      .hero-copy { font-size: 13px; }
      .hero-actions { gap: 8px; }
      .btn-main, .btn-ghost { min-height: 42px; padding: 9px 13px; font-size: 13px; }
      .hero-search { gap: 2px; }
      .hero-search input { padding-left: 8px; font-size: 13px; }
      .hero-search button { padding: 9px 12px; font-size: 12px; }
      main section { padding: 48px 0; }
      .section-heading { align-items: start; margin-bottom: 21px; }
      .section-heading h2 { font-size: 23px; }
      .section-heading p { font-size: 13px; }
      .section-heading .text-link { font-size: 12px; }
      .metric { padding: 18px 15px; }
      .metric strong { font-size: 23px; }
      .poster-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px 13px; }
      .recommend-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
      .recommend-card { min-height: 135px; padding: 13px; }
      .recommend-card h3 { font-size: 14px; }
      .recommend-card p { font-size: 11px; }
      .category-grid { gap: 9px; }
      .category-item { min-height: 150px; padding: 14px 12px; }
      .rank-row { grid-template-columns: 25px minmax(0,1fr) 54px 42px; gap: 7px; min-height: 55px; }
      .rank-row .rank-muted:nth-last-child(2) { display: none; }
      .rank-title { font-size: 13px; }
      .rank-tag { font-size: 10px; }
      .editorial-grid { grid-template-columns: 1fr; }
      .editorial-card { display: grid; grid-template-columns: 38% 1fr; }
      .editorial-card img { height: 100%; min-height: 128px; aspect-ratio: auto; }
      .editorial-body { padding: 11px; }
      .editorial-body h3 { font-size: 13px; }
      .editorial-body p { display: none; }
      .timeline-step { padding-right: 12px; }
      .timeline-step:not(:last-child)::after { right: 0; }
      .timeline-step h3 { font-size: 13px; }
      .timeline-step p { font-size: 11px; }
      .partner-row { grid-template-columns: repeat(2, 1fr); }
      .contact-band { padding: 22px 18px; }
      .contact-band h2 { font-size: 21px; }
      .contact-form { flex-direction: column; }
      .contact-form button { min-height: 43px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 22px 14px; }
      .footer-grid > div:first-child { grid-column: 1 / -1; }
      .footer-bottom { flex-direction: column; gap: 5px; }
    }