/* roulang page: index */
:root {
      --blue: #1769d1;
      --blue-deep: #0d3d83;
      --blue-soft: #eaf3ff;
      --ink: #172333;
      --muted: #647286;
      --line: #dce5ef;
      --paper: #ffffff;
      --wash: #f5f8fc;
      --teal: #168b7a;
      --teal-soft: #e7f7f3;
      --orange: #c96a1d;
      --orange-soft: #fff2e5;
      --radius: 8px;
      --shadow: 0 12px 30px rgba(26, 57, 95, .08);
      --shadow-hover: 0 18px 34px rgba(26, 57, 95, .14);
      --container: 1220px;
      --ease: 180ms ease;
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      font-size: 16px;
      line-height: 1.7;
      letter-spacing: 0;
    }
    body.modal-open { overflow: hidden; }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    button, input, select, textarea { font: inherit; }
    button { cursor: pointer; }
    :focus-visible {
      outline: 3px solid rgba(23, 105, 209, .35);
      outline-offset: 3px;
    }
    .container {
      width: min(var(--container), calc(100% - 48px));
      margin: 0 auto;
    }
    .sr-only {
      position: absolute;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0, 0, 0, 0);
      white-space: nowrap;
      border: 0;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 4px 16px rgba(26,57,95,.05);
    }
    .nav-wrap {
      min-height: 76px;
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: 238px;
      font-weight: 800;
      color: var(--blue-deep);
      line-height: 1.2;
    }
    .brand-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      color: #fff;
      background: var(--blue);
      border-radius: 6px;
      font-size: 15px;
      letter-spacing: 0;
    }
    .brand-name { font-size: 16px; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 4px;
      flex: 1;
    }
    .nav-links a {
      position: relative;
      padding: 25px 13px 22px;
      color: var(--muted);
      font-size: 14px;
      font-weight: 600;
      transition: color var(--ease);
    }
    .nav-links a::after {
      content: "";
      position: absolute;
      left: 13px;
      right: 13px;
      bottom: 15px;
      height: 2px;
      background: var(--blue);
      transform: scaleX(0);
      transition: transform var(--ease);
    }
    .nav-links a:hover, .nav-links a.active { color: var(--blue); }
    .nav-links a.active::after, .nav-links a:hover::after { transform: scaleX(1); }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .age-note {
      color: var(--orange);
      background: var(--orange-soft);
      padding: 6px 10px;
      border-radius: 5px;
      font-size: 12px;
      font-weight: 700;
      white-space: nowrap;
    }
    .icon-btn, .menu-btn {
      width: 40px;
      height: 40px;
      border: 1px solid var(--line);
      background: #fff;
      color: var(--blue-deep);
      border-radius: 6px;
      display: grid;
      place-items: center;
      transition: all var(--ease);
    }
    .icon-btn:hover, .menu-btn:hover { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); }
    .icon-btn:active, .menu-btn:active { transform: translateY(1px); }
    .menu-btn { display: none; }

    .hero {
      min-height: 620px;
      display: flex;
      align-items: center;
      position: relative;
      overflow: hidden;
      color: #fff;
      background:
        linear-gradient(90deg, rgba(8,28,58,.88) 0%, rgba(8,28,58,.66) 45%, rgba(8,28,58,.28) 100%),
        url("https://images.unsplash.com/photo-1489599849927-2ee91cede3ba?auto=format&fit=crop&w=1800&q=88") center/cover no-repeat;
    }
    .hero-content {
      width: min(760px, 100%);
      padding: 92px 0 86px;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 20px;
      color: #c8e1ff;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: .03em;
    }
    .eyebrow::before {
      content: "";
      width: 22px;
      height: 2px;
      background: #71b5ff;
    }
    .hero h1 {
      max-width: 680px;
      margin: 0 0 22px;
      font-size: clamp(40px, 5vw, 68px);
      line-height: 1.12;
      letter-spacing: 0;
      font-weight: 800;
    }
    .hero h1 em { color: #78c8bd; font-style: normal; }
    .hero p {
      max-width: 700px;
      margin: 0 0 30px;
      color: #e3edf8;
      font-size: 18px;
      line-height: 1.9;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .btn {
      display: inline-flex;
      justify-content: center;
      align-items: center;
      gap: 8px;
      min-height: 46px;
      padding: 10px 18px;
      border: 1px solid transparent;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 700;
      transition: all var(--ease);
    }
    .btn-primary { background: var(--blue); color: #fff; }
    .btn-primary:hover { background: #0f58b5; transform: translateY(-2px); }
    .btn-secondary { color: #fff; border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.08); }
    .btn-secondary:hover { background: rgba(255,255,255,.18); border-color: #fff; }
    .btn-outline { color: var(--blue); background: #fff; border-color: var(--line); }
    .btn-outline:hover { color: var(--blue-deep); border-color: var(--blue); background: var(--blue-soft); }
    .btn:disabled { cursor: not-allowed; opacity: .55; transform: none; }
    .hero-facts {
      display: flex;
      flex-wrap: wrap;
      gap: 26px;
      margin-top: 44px;
      padding-top: 23px;
      border-top: 1px solid rgba(255,255,255,.25);
    }
    .hero-fact strong { display: block; font-size: 22px; color: #fff; }
    .hero-fact span { color: #c5d5e8; font-size: 13px; }

    main { overflow: hidden; }
    .section { padding: 84px 0; }
    .section-wash { background: var(--wash); }
    .section-blue { background: var(--blue-soft); }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 32px;
    }
    .section-kicker {
      margin: 0 0 8px;
      color: var(--blue);
      font-size: 12px;
      font-weight: 800;
      letter-spacing: .08em;
      text-transform: uppercase;
    }
    .section h2 {
      margin: 0;
      color: var(--blue-deep);
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.25;
      letter-spacing: 0;
    }
    .section-intro {
      max-width: 680px;
      margin: 13px 0 0;
      color: var(--muted);
      font-size: 15px;
    }
    .text-link {
      flex: none;
      color: var(--blue);
      font-size: 14px;
      font-weight: 700;
      border-bottom: 1px solid transparent;
    }
    .text-link:hover { border-color: var(--blue); }

    .safety-bar { padding: 20px 0; background: #fff; border-bottom: 1px solid var(--line); }
    .safety-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .safety-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 7px 22px;
      border-right: 1px solid var(--line);
    }
    .safety-item:first-child { padding-left: 0; }
    .safety-item:last-child { border-right: 0; }
    .safety-icon {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--teal);
      background: var(--teal-soft);
      font-weight: 800;
      font-size: 12px;
    }
    .safety-item strong { display: block; font-size: 14px; }
    .safety-item span { color: var(--muted); font-size: 12px; }

    .release-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
    .media-card {
      min-width: 0;
      overflow: hidden;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }
    .media-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: #b9d1ea; }
    .media-image { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: #dfe8f1; }
    .media-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms ease; }
    .media-card:hover .media-image img { transform: scale(1.04); }
    .media-image::after {
      content: "合规画面";
      position: absolute;
      left: 10px;
      bottom: 10px;
      padding: 3px 7px;
      color: #fff;
      background: rgba(13,61,131,.82);
      border-radius: 3px;
      font-size: 11px;
    }
    .media-body { padding: 16px; }
    .media-title { margin: 0 0 9px; font-size: 16px; line-height: 1.45; }
    .meta-row { display: flex; justify-content: space-between; gap: 8px; align-items: center; color: var(--muted); font-size: 12px; }
    .badges { display: flex; flex-wrap: wrap; gap: 6px; margin: 11px 0; }
    .badge {
      display: inline-flex;
      align-items: center;
      min-height: 22px;
      padding: 2px 7px;
      border-radius: 4px;
      color: var(--blue-deep);
      background: var(--blue-soft);
      font-size: 11px;
      font-weight: 700;
    }
    .badge.green { color: #126d60; background: var(--teal-soft); }
    .badge.orange { color: #9a5118; background: var(--orange-soft); }
    .rating { color: #b45c18; font-weight: 800; }

    .recommend-strip { display: grid; grid-template-columns: 1.35fr .95fr .95fr; gap: 20px; }
    .recommend-item {
      min-height: 250px;
      position: relative;
      overflow: hidden;
      display: flex;
      align-items: end;
      border-radius: var(--radius);
      background: #1c3856;
      color: #fff;
    }
    .recommend-item:first-child { grid-row: span 2; min-height: 520px; }
    .recommend-item img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .68; transition: transform 400ms ease; }
    .recommend-item:hover img { transform: scale(1.05); }
    .recommend-overlay { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,25,51,.9), rgba(7,25,51,.04) 70%); }
    .recommend-copy { position: relative; z-index: 1; width: 100%; padding: 24px; }
    .recommend-copy h3 { margin: 0 0 8px; font-size: 21px; }
    .recommend-copy p { margin: 0 0 12px; color: #d4e0ed; font-size: 13px; }
    .recommend-item:not(:first-child) .recommend-copy h3 { font-size: 17px; }

    .channel-grid { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
    .channel {
      min-height: 185px;
      padding: 24px;
      border-right: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      background: #fff;
      transition: background var(--ease);
    }
    .channel:hover { background: var(--blue-soft); }
    .channel-number { color: var(--blue); font-size: 12px; font-weight: 800; }
    .channel h3 { margin: 16px 0 8px; font-size: 18px; }
    .channel p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.7; }

    .ranking { border-top: 2px solid var(--blue-deep); }
    .rank-row {
      display: grid;
      grid-template-columns: 55px minmax(180px, 1.6fr) 1fr 100px 110px;
      align-items: center;
      gap: 16px;
      min-height: 66px;
      padding: 10px 18px;
      border-bottom: 1px solid var(--line);
      background: #fff;
      transition: background var(--ease);
    }
    .rank-row:hover { background: var(--blue-soft); }
    .rank-row.top { border-left: 3px solid var(--blue); }
    .rank-no { color: var(--muted); font-size: 22px; font-weight: 800; }
    .rank-row.top .rank-no { color: var(--blue); }
    .rank-title { font-weight: 700; }
    .rank-detail { color: var(--muted); font-size: 13px; }
    .rank-score { color: var(--orange); font-weight: 800; }

    .topic-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .topic {
      padding: 28px 24px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }
    .topic-mark { color: var(--teal); font-size: 25px; font-weight: 800; }
    .topic h3 { margin: 15px 0 8px; font-size: 18px; }
    .topic p { margin: 0; color: var(--muted); font-size: 13px; }

    .news-layout { display: grid; grid-template-columns: 1.3fr 1fr; gap: 28px; }
    .news-feature { display: grid; grid-template-columns: 42% 1fr; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
    .news-feature img { width: 100%; height: 100%; min-height: 250px; object-fit: cover; }
    .news-copy { padding: 28px; }
    .news-copy h3 { margin: 12px 0; font-size: 22px; line-height: 1.4; }
    .news-copy p { color: var(--muted); font-size: 14px; }
    .news-list { background: #fff; border-top: 1px solid var(--line); }
    .news-item { display: flex; gap: 15px; padding: 15px 0; border-bottom: 1px solid var(--line); }
    .news-thumb { width: 98px; height: 68px; flex: none; overflow: hidden; border-radius: 5px; background: #dfe8f1; }
    .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
    .news-item h3 { margin: 0 0 4px; font-size: 15px; line-height: 1.4; }
    .news-item p { margin: 0; color: var(--muted); font-size: 12px; }

    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .step { position: relative; padding: 30px 25px 31px; border-right: 1px solid var(--line); }
    .step:last-child { border-right: 0; }
    .step-number { color: var(--blue); font-size: 13px; font-weight: 800; }
    .step h3 { margin: 16px 0 8px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }

    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .metric { padding: 26px; background: #fff; border-left: 3px solid var(--blue); box-shadow: var(--shadow); }
    .metric strong { display: block; color: var(--blue-deep); font-size: 32px; line-height: 1.2; }
    .metric span { display: block; margin-top: 8px; color: var(--muted); font-size: 13px; }
    .metric small { display: block; margin-top: 15px; color: var(--teal); font-size: 12px; }

    .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .quote { padding: 25px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
    .quote p { margin: 0 0 18px; font-size: 15px; line-height: 1.8; }
    .quote footer { color: var(--muted); font-size: 12px; }

    .faq-list { max-width: 900px; margin: 0 auto; border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-question {
      width: 100%;
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding: 21px 0;
      border: 0;
      background: transparent;
      color: var(--ink);
      text-align: left;
      font-weight: 700;
    }
    .faq-question span:last-child { color: var(--blue); font-size: 22px; line-height: 1; }
    .faq-answer { display: none; padding: 0 42px 22px 0; color: var(--muted); font-size: 14px; }
    .faq-item.open .faq-answer { display: block; }
    .faq-item.open .faq-question span:last-child { transform: rotate(45deg); }

    .final-cta {
      padding: 72px 0;
      color: #fff;
      background: var(--blue-deep);
    }
    .cta-layout { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
    .final-cta h2 { margin: 0 0 10px; color: #fff; font-size: 32px; }
    .final-cta p { max-width: 700px; margin: 0; color: #d7e4f3; }
    .cta-actions { display: flex; flex-wrap: wrap; gap: 10px; flex: none; }
    .final-cta .btn-primary { color: var(--blue-deep); background: #fff; }
    .final-cta .btn-primary:hover { background: #e7f1ff; }
    .final-cta .btn-secondary { border-color: rgba(255,255,255,.45); }

    .site-footer { padding: 46px 0 24px; background: #10243f; color: #c9d7e7; }
    .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 35px; }
    .footer-brand { color: #fff; }
    .footer-brand p { max-width: 360px; margin: 16px 0 0; color: #aebfd2; font-size: 13px; }
    .footer-col h3 { margin: 0 0 13px; color: #fff; font-size: 14px; }
    .footer-col a { display: block; width: fit-content; margin: 7px 0; color: #afc0d4; font-size: 13px; }
    .footer-col a:hover { color: #fff; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.14); color: #91a7bf; font-size: 12px; }

    .modal-backdrop {
      position: fixed;
      inset: 0;
      z-index: 100;
      display: none;
      place-items: center;
      padding: 20px;
      background: rgba(8, 25, 48, .72);
    }
    .modal-backdrop.show { display: grid; }
    .modal {
      width: min(500px, 100%);
      max-height: 90vh;
      overflow: auto;
      padding: 30px;
      background: #fff;
      border-radius: var(--radius);
      box-shadow: 0 24px 70px rgba(0,0,0,.25);
    }
    .modal h2 { margin: 0 0 10px; color: var(--blue-deep); font-size: 25px; }
    .modal p { margin: 0 0 20px; color: var(--muted); font-size: 14px; }
    .modal-actions { display: flex; gap: 10px; margin-top: 22px; }
    .form-grid { display: grid; gap: 14px; }
    .form-field label { display: block; margin-bottom: 5px; color: var(--ink); font-size: 13px; font-weight: 700; }
    .form-field input, .form-field select, .form-field textarea {
      width: 100%;
      padding: 10px 12px;
      border: 1px solid var(--line);
      border-radius: 5px;
      color: var(--ink);
      background: #fff;
      transition: border-color var(--ease), box-shadow var(--ease);
    }
    .form-field textarea { min-height: 110px; resize: vertical; }
    .form-field input:focus, .form-field select:focus, .form-field textarea:focus {
      border-color: var(--blue);
      box-shadow: 0 0 0 3px rgba(23,105,209,.12);
      outline: 0;
    }
    .check-line { display: flex; gap: 8px; align-items: flex-start; color: var(--muted); font-size: 12px; }
    .close-modal {
      float: right;
      width: 32px;
      height: 32px;
      border: 0;
      background: var(--wash);
      color: var(--muted);
      border-radius: 4px;
      font-size: 20px;
    }
    .close-modal:hover { color: var(--blue); background: var(--blue-soft); }

    @media (max-width: 1200px) {
      .release-grid { grid-template-columns: repeat(3, 1fr); }
      .channel-grid { grid-template-columns: repeat(3, 1fr); }
      .brand { min-width: 210px; }
    }
    @media (max-width: 992px) {
      .container { width: min(var(--container), calc(100% - 36px)); }
      .nav-wrap { gap: 16px; }
      .brand { min-width: auto; flex: 1; }
      .nav-links a { padding-left: 8px; padding-right: 8px; }
      .nav-links a::after { left: 8px; right: 8px; }
      .age-note { display: none; }
      .hero { min-height: 570px; }
      .recommend-strip { grid-template-columns: 1fr 1fr; }
      .recommend-item:first-child { grid-column: span 2; grid-row: auto; min-height: 360px; }
      .news-layout { grid-template-columns: 1fr; }
      .topic-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
      .footer-grid > :first-child { grid-column: span 3; }
    }
    @media (max-width: 768px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      .nav-wrap { min-height: 66px; }
      .nav-links {
        position: absolute;
        top: 66px;
        left: 14px;
        right: 14px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 8px;
        background: #fff;
        border: 1px solid var(--line);
        box-shadow: var(--shadow-hover);
      }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 12px; border-radius: 4px; }
      .nav-links a:hover, .nav-links a.active { background: var(--blue-soft); }
      .nav-links a::after { display: none; }
      .menu-btn { display: grid; }
      .hero-content { padding: 72px 0; }
      .hero h1 { font-size: 43px; }
      .hero p { font-size: 16px; }
      .section { padding: 62px 0; }
      .section-head { display: block; margin-bottom: 25px; }
      .section-head .text-link { display: inline-block; margin-top: 14px; }
      .safety-list { grid-template-columns: repeat(2, 1fr); }
      .safety-item { padding: 10px 12px; border-bottom: 1px solid var(--line); }
      .safety-item:nth-child(2) { border-right: 0; }
      .safety-item:first-child { padding-left: 12px; }
      .release-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
      .channel-grid { grid-template-columns: repeat(2, 1fr); }
      .recommend-strip { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
      .recommend-item, .recommend-item:first-child { min-width: 78vw; min-height: 310px; scroll-snap-align: start; }
      .rank-row { grid-template-columns: 38px minmax(120px, 1fr) 70px; gap: 10px; padding: 9px 7px; }
      .rank-detail { display: none; }
      .rank-row .badges { margin: 0; }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .step:nth-child(2) { border-right: 0; }
      .step:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .quotes { grid-template-columns: 1fr; }
      .cta-layout { display: block; }
      .cta-actions { margin-top: 25px; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid > :first-child { grid-column: span 2; }
      .footer-bottom { display: block; }
      .footer-bottom span { display: block; margin-top: 7px; }
    }
    @media (max-width: 576px) {
      .brand-name { max-width: 175px; font-size: 14px; }
      .brand-mark { width: 31px; height: 31px; }
      .hero { min-height: 610px; }
      .hero h1 { font-size: 36px; }
      .hero-actions .btn { width: 100%; }
      .hero-facts { gap: 16px; }
      .release-grid, .channel-grid, .topic-grid, .metrics { grid-template-columns: 1fr; }
      .media-body { padding: 13px; }
      .news-feature { grid-template-columns: 1fr; }
      .news-feature img { height: 190px; min-height: 0; }
      .steps { grid-template-columns: 1fr; }
      .step, .step:nth-child(2) { border-right: 0; border-bottom: 1px solid var(--line); }
      .step:last-child { border-bottom: 0; }
      .final-cta h2 { font-size: 27px; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-grid > :first-child { grid-column: auto; }
      .modal { padding: 22px; }
    }