/* roulang page: index */
:root {
      --ink: #f5f7fa;
      --muted: #9ba7b5;
      --subtle: #6f7b89;
      --bg: #0d1117;
      --panel: #151b24;
      --panel-2: #1a222d;
      --line: rgba(255,255,255,.09);
      --accent: #e6b66b;
      --accent-strong: #f1c985;
      --green: #9fc9b4;
      --radius: 18px;
      --shadow: 0 18px 55px rgba(0,0,0,.22);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        radial-gradient(circle at 82% 8%, rgba(230,182,107,.10), transparent 28rem),
        var(--bg);
      font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
      line-height: 1.75;
      letter-spacing: 0;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    ::selection { color: #111; background: var(--accent); }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid var(--line);
      background: rgba(13,17,23,.88);
      backdrop-filter: blur(18px);
    }
    .container { width: min(1180px, calc(100% - 40px)); margin: 0 auto; }
    .nav-shell {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      letter-spacing: .02em;
      white-space: nowrap;
    }
    .brand-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(230,182,107,.55);
      border-radius: 11px;
      color: var(--accent-strong);
      background: rgba(230,182,107,.08);
      font-size: 14px;
    }
    .brand-text { font-size: 15px; }
    .nav-links { display: flex; align-items: center; gap: 8px; }
    .nav-links a {
      padding: 9px 15px;
      border-radius: 10px;
      color: var(--muted);
      font-size: 14px;
      transition: .2s ease;
    }
    .nav-links a:hover, .nav-links a:focus-visible, .nav-links a.active {
      color: var(--ink);
      background: rgba(255,255,255,.07);
      outline: none;
    }
    .nav-badge {
      padding: 7px 12px;
      border: 1px solid rgba(230,182,107,.25);
      border-radius: 999px;
      color: var(--accent-strong);
      font-size: 12px;
      background: rgba(230,182,107,.06);
    }
    .menu-toggle { display: none; border: 0; color: var(--ink); background: transparent; font-size: 24px; }

    main { overflow: hidden; }
    .hero {
      min-height: 640px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid var(--line);
      background:
        linear-gradient(90deg, rgba(13,17,23,.98) 0%, rgba(13,17,23,.86) 48%, rgba(13,17,23,.35) 100%),
        url('https://images.unsplash.com/photo-1515886657613-9f3515b0c78f?auto=format&fit=crop&w=1800&q=85') center/cover;
    }
    .hero-grid {
      width: 100%;
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(340px, .9fr);
      gap: 70px;
      align-items: center;
      padding: 82px 0;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 18px;
      color: var(--accent-strong);
      font-size: 12px;
      letter-spacing: .12em;
    }
    .eyebrow::before {
      content: "";
      width: 28px;
      height: 1px;
      background: var(--accent);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 760px;
      margin-bottom: 22px;
      font-size: clamp(38px, 5vw, 68px);
      line-height: 1.13;
      letter-spacing: -.03em;
    }
    .hero-copy {
      max-width: 690px;
      color: #c6ced8;
      font-size: 17px;
      line-height: 2;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 46px;
      padding: 0 20px;
      border: 1px solid transparent;
      border-radius: 11px;
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, border-color .2s ease;
    }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #16120c; background: var(--accent-strong); }
    .button-primary:hover { background: #f6d79e; }
    .button-ghost { color: var(--ink); border-color: var(--line); background: rgba(255,255,255,.04); }
    .button-ghost:hover { border-color: rgba(230,182,107,.5); background: rgba(230,182,107,.08); }
    .hero-form {
      padding: 28px;
      border: 1px solid rgba(255,255,255,.13);
      border-radius: 20px;
      background: rgba(17,23,31,.78);
      box-shadow: var(--shadow);
      backdrop-filter: blur(14px);
    }
    .hero-form h2 { margin-bottom: 7px; font-size: 22px; }
    .hero-form p { margin-bottom: 20px; color: var(--muted); font-size: 13px; }
    .form-row { display: flex; gap: 10px; }
    .form-input {
      width: 100%;
      min-height: 46px;
      padding: 0 14px;
      border: 1px solid var(--line);
      border-radius: 10px;
      outline: none;
      color: var(--ink);
      background: rgba(255,255,255,.06);
    }
    .form-input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(230,182,107,.12); }
    .form-note { margin: 15px 0 0; color: var(--subtle); font-size: 12px; }

    .section { padding: 88px 0; border-bottom: 1px solid var(--line); }
    .section-alt { background: rgba(255,255,255,.025); }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 30px;
      margin-bottom: 34px;
    }
    .section-kicker { margin-bottom: 8px; color: var(--accent); font-size: 12px; letter-spacing: .14em; }
    h2 { margin-bottom: 10px; font-size: clamp(28px, 3.4vw, 43px); line-height: 1.25; letter-spacing: -.025em; }
    .section-lead { max-width: 650px; margin: 0; color: var(--muted); font-size: 15px; }
    .metric-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .metric {
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel);
    }
    .metric strong { display: block; margin-bottom: 5px; color: var(--accent-strong); font-size: 30px; line-height: 1.2; }
    .metric span { color: var(--muted); font-size: 13px; }
    .matrix { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .card {
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
    }
    .card:hover { transform: translateY(-4px); border-color: rgba(230,182,107,.38); box-shadow: var(--shadow); }
    .card-icon {
      width: 40px;
      height: 40px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      border-radius: 12px;
      color: var(--accent-strong);
      background: rgba(230,182,107,.1);
      font-weight: 800;
    }
    .card h3 { margin-bottom: 8px; font-size: 19px; }
    .card p { margin-bottom: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
    .category-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 16px; }
    .category-card {
      min-height: 210px;
      display: flex;
      flex-direction: column;
      justify-content: end;
      padding: 25px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background:
        linear-gradient(180deg, transparent 15%, rgba(10,13,18,.92) 100%),
        url('https://images.unsplash.com/photo-1529139574466-a303027c1d8b?auto=format&fit=crop&w=900&q=80') center/cover;
    }
    .category-card:nth-child(2) { background-image: linear-gradient(180deg, transparent 15%, rgba(10,13,18,.92) 100%), url('https://images.unsplash.com/photo-1483985988355-763728e1935b?auto=format&fit=crop&w=900&q=80'); }
    .category-card:nth-child(3) { background-image: linear-gradient(180deg, transparent 15%, rgba(10,13,18,.92) 100%), url('https://images.unsplash.com/photo-1490481651871-ab68de25d43d?auto=format&fit=crop&w=900&q=80'); }
    .category-card h3 { margin: 0 0 7px; font-size: 21px; }
    .category-card p { margin: 0; color: #c0c8d2; font-size: 13px; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 15px; }
    .tag { padding: 5px 10px; border: 1px solid rgba(255,255,255,.12); border-radius: 999px; color: var(--muted); font-size: 12px; background: rgba(0,0,0,.2); }
    .comparison { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .compare-box { padding: 28px; border-radius: var(--radius); border: 1px solid var(--line); }
    .compare-box.dim { background: rgba(255,255,255,.025); }
    .compare-box.highlight { border-color: rgba(230,182,107,.4); background: rgba(230,182,107,.07); }
    .compare-box h3 { margin-bottom: 18px; font-size: 20px; }
    .check-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
    .check-list li { position: relative; padding-left: 24px; color: var(--muted); font-size: 14px; }
    .check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--green); font-weight: 800; }
    .timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .timeline-item { position: relative; padding: 22px 24px 10px 0; }
    .timeline-item:not(:last-child)::after { content: ""; position: absolute; top: 36px; left: 34px; right: 0; height: 1px; background: var(--line); }
    .timeline-dot { position: relative; z-index: 1; width: 26px; height: 26px; display: grid; place-items: center; margin-bottom: 18px; border: 1px solid var(--accent); border-radius: 50%; color: var(--accent-strong); background: var(--bg); font-size: 12px; }
    .timeline-item h3 { margin-bottom: 8px; font-size: 17px; }
    .timeline-item p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.75; }
    .news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .news-item { padding: 22px; border-left: 2px solid var(--accent); background: var(--panel); }
    .news-item time { color: var(--accent); font-size: 12px; }
    .news-item h3 { margin: 10px 0 8px; font-size: 17px; }
    .news-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .trust-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .trust-panel { padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel-2); }
    .trust-panel h3 { margin-bottom: 10px; font-size: 20px; }
    .trust-panel p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .faq-list { display: grid; gap: 12px; max-width: 900px; }
    details { padding: 18px 20px; border: 1px solid var(--line); border-radius: 13px; background: var(--panel); }
    summary { cursor: pointer; color: var(--ink); font-weight: 700; }
    details p { margin: 14px 0 0; color: var(--muted); font-size: 14px; }
    .closing {
      padding: 72px 0;
      background: #171d26;
      text-align: center;
    }
    .closing p { max-width: 680px; margin: 0 auto 24px; color: var(--muted); }
    footer { padding: 40px 0 28px; background: #0a0d12; }
    .footer-top { display: flex; justify-content: space-between; gap: 35px; padding-bottom: 28px; border-bottom: 1px solid var(--line); }
    .footer-copy { max-width: 420px; color: var(--muted); font-size: 13px; }
    .footer-links { display: flex; gap: 18px; color: var(--muted); font-size: 13px; }
    .footer-links a:hover { color: var(--accent-strong); }
    .copyright { display: flex; justify-content: space-between; gap: 20px; padding-top: 20px; color: var(--subtle); font-size: 12px; }
    .age-note { color: var(--accent); }

    @media (max-width: 900px) {
      .hero-grid { grid-template-columns: 1fr; gap: 32px; }
      .hero { min-height: auto; }
      .metric-grid { grid-template-columns: repeat(2, 1fr); }
      .matrix, .news-list { grid-template-columns: repeat(2, 1fr); }
      .category-grid { grid-template-columns: 1fr 1fr; }
      .category-card:first-child { grid-column: span 2; }
      .timeline { grid-template-columns: repeat(2, 1fr); gap: 14px; }
      .timeline-item:not(:last-child)::after { display: none; }
    }
    @media (max-width: 680px) {
      .container { width: min(100% - 28px, 560px); }
      .nav-shell { min-height: 66px; }
      .nav-badge { display: none; }
      .menu-toggle { display: block; }
      .nav-links {
        position: absolute;
        top: 66px;
        left: 14px;
        right: 14px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: 14px;
        background: #141a22;
        box-shadow: var(--shadow);
      }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 12px 14px; }
      .brand-text { font-size: 13px; }
      .hero-grid { padding: 62px 0; }
      h1 { font-size: 39px; }
      .hero-copy { font-size: 15px; line-height: 1.85; }
      .form-row { flex-direction: column; }
      .section { padding: 62px 0; }
      .section-head { display: block; }
      .section-lead { margin-top: 12px; }
      .metric-grid, .matrix, .news-list, .category-grid, .comparison, .trust-grid { grid-template-columns: 1fr; }
      .category-card:first-child { grid-column: auto; }
      .timeline { grid-template-columns: 1fr; }
      .footer-top, .copyright { display: block; }
      .footer-links { margin-top: 20px; flex-wrap: wrap; }
      .copyright span { display: block; margin-top: 8px; }
    }

/* roulang page: category1 */
:root {
      --ink: #f5f7fa;
      --muted: #9ba7b5;
      --subtle: #6f7b89;
      --bg: #0d1117;
      --panel: #151b24;
      --panel-2: #1a222d;
      --line: rgba(255,255,255,.09);
      --accent: #e6b66b;
      --accent-strong: #f1c985;
      --green: #9fc9b4;
      --radius: 18px;
      --shadow: 0 18px 55px rgba(0,0,0,.22);
      --content: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: radial-gradient(circle at 82% 8%, rgba(230,182,107,.10), transparent 28rem), var(--bg);
      font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
      font-size: 15px;
      line-height: 1.75;
      letter-spacing: 0;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; }
    button, input { font: inherit; }
    button { cursor: pointer; }
    button:focus-visible, a:focus-visible, input:focus-visible {
      outline: 2px solid var(--accent-strong);
      outline-offset: 3px;
    }
    h1, h2, h3, p { margin-top: 0; }
    .container { width: min(var(--content), calc(100% - 40px)); margin-inline: auto; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid var(--line);
      background: rgba(13,17,23,.9);
      backdrop-filter: blur(18px);
    }
    .nav-shell {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 800;
      white-space: nowrap;
    }
    .brand-mark {
      width: 34px;
      height: 34px;
      display: grid;
      place-items: center;
      border: 1px solid rgba(230,182,107,.55);
      border-radius: 11px;
      color: var(--accent-strong);
      background: rgba(230,182,107,.08);
      font-size: 14px;
    }
    .brand-text { font-size: 15px; }
    .nav-links { display: flex; align-items: center; gap: 8px; }
    .nav-links a {
      padding: 9px 15px;
      border-radius: 10px;
      color: var(--muted);
      font-size: 14px;
      transition: color .2s ease, background .2s ease;
    }
    .nav-links a:hover, .nav-links a:focus-visible, .nav-links a.active {
      color: var(--ink);
      background: rgba(255,255,255,.07);
      outline: none;
    }
    .nav-badge {
      padding: 7px 12px;
      border: 1px solid rgba(230,182,107,.25);
      border-radius: 999px;
      color: var(--accent-strong);
      background: rgba(230,182,107,.06);
      font-size: 12px;
    }
    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 10px;
      color: var(--ink);
      background: rgba(255,255,255,.04);
      font-size: 20px;
    }

    main { overflow: hidden; }
    .hero {
      position: relative;
      min-height: 430px;
      display: grid;
      align-items: end;
      border-bottom: 1px solid var(--line);
      background:
        linear-gradient(90deg, rgba(13,17,23,.96) 0%, rgba(13,17,23,.78) 55%, rgba(13,17,23,.38) 100%),
        linear-gradient(0deg, rgba(13,17,23,.78), transparent 60%),
        url("https://images.unsplash.com/photo-1515886657613-9f3515b0c78f?auto=format&fit=crop&w=1800&q=85") center 38%/cover;
    }
    .hero-content { padding: 66px 0 56px; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      margin-bottom: 15px;
      color: var(--accent-strong);
      font-size: 12px;
    }
    .eyebrow::before { content: ""; width: 26px; height: 1px; background: var(--accent); }
    .hero h1 { max-width: 800px; margin-bottom: 14px; font-size: clamp(32px, 4vw, 52px); line-height: 1.25; }
    .hero-copy { max-width: 720px; margin-bottom: 23px; color: #c6ced8; font-size: 16px; line-height: 1.95; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; }
    .button {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0 18px;
      border: 1px solid transparent;
      border-radius: 10px;
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, border-color .2s ease;
    }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #16120c; background: var(--accent-strong); }
    .button-primary:hover { background: #f6d79e; }
    .button-ghost { color: var(--ink); border-color: var(--line); background: rgba(255,255,255,.04); }
    .button-ghost:hover { border-color: rgba(230,182,107,.5); background: rgba(230,182,107,.08); }

    .section { padding: 70px 0; border-bottom: 1px solid var(--line); }
    .section-alt { background: rgba(255,255,255,.025); }
    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 28px;
    }
    .section-kicker { margin-bottom: 7px; color: var(--accent); font-size: 12px; }
    .section-title { margin-bottom: 0; font-size: 28px; line-height: 1.4; }
    .section-lead { max-width: 650px; margin: 0; color: var(--muted); font-size: 14px; }
    .metric-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--panel);
      overflow: hidden;
    }
    .metric {
      min-height: 112px;
      padding: 22px 25px;
      border-right: 1px solid var(--line);
    }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; margin-bottom: 3px; color: var(--accent-strong); font-size: 25px; }
    .metric span { color: var(--muted); font-size: 13px; }

    .topic-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr); gap: 20px; }
    .topic-feature {
      min-height: 260px;
      display: flex;
      flex-direction: column;
      justify-content: end;
      padding: 30px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background:
        linear-gradient(0deg, rgba(10,14,19,.96), rgba(10,14,19,.10) 85%),
        url("https://images.unsplash.com/photo-1534528741775-53994a69daeb?auto=format&fit=crop&w=1200&q=85") center 35%/cover;
    }
    .topic-feature h3 { max-width: 450px; margin-bottom: 8px; font-size: 24px; }
    .topic-feature p { max-width: 510px; margin-bottom: 0; color: #c5ccd4; font-size: 14px; }
    .topic-side { display: grid; gap: 14px; }
    .topic-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding: 19px 21px;
      border: 1px solid var(--line);
      border-radius: 14px;
      background: var(--panel);
      transition: border-color .2s ease, transform .2s ease;
    }
    .topic-row:hover { transform: translateX(3px); border-color: rgba(230,182,107,.4); }
    .topic-row h3 { margin: 0 0 4px; font-size: 16px; }
    .topic-row p { margin: 0; color: var(--muted); font-size: 12px; }
    .topic-arrow { color: var(--accent); font-size: 20px; }

    .style-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .style-card {
      min-height: 188px;
      padding: 23px;
      border: 1px solid var(--line);
      border-radius: 15px;
      background: linear-gradient(145deg, rgba(255,255,255,.045), transparent 70%), var(--panel);
      transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
    }
    .style-card:hover { transform: translateY(-3px); border-color: rgba(230,182,107,.34); box-shadow: var(--shadow); }
    .style-index { display: block; margin-bottom: 18px; color: var(--accent); font-size: 12px; }
    .style-card h3 { margin-bottom: 8px; font-size: 18px; }
    .style-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
    .tag {
      padding: 5px 9px;
      border: 1px solid var(--line);
      border-radius: 999px;
      color: #c1c9d2;
      background: rgba(255,255,255,.03);
      font-size: 11px;
    }

    .editorial-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 46px; align-items: start; }
    .editorial-aside { position: sticky; top: 105px; }
    .editorial-aside h2 { margin-bottom: 12px; font-size: 28px; line-height: 1.45; }
    .editorial-aside p { color: var(--muted); font-size: 14px; }
    .editorial-list { border-top: 1px solid var(--line); }
    .editorial-item {
      display: grid;
      grid-template-columns: 54px 1fr auto;
      align-items: center;
      gap: 18px;
      padding: 19px 0;
      border-bottom: 1px solid var(--line);
    }
    .editorial-no { color: var(--accent); font-size: 13px; }
    .editorial-item h3 { margin: 0 0 4px; font-size: 16px; }
    .editorial-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .editorial-meta { color: var(--subtle); font-size: 12px; white-space: nowrap; }

    .contrast {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1px;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--line);
    }
    .contrast-column { padding: 28px; background: var(--panel); }
    .contrast-column h3 { margin-bottom: 16px; font-size: 17px; }
    .contrast-column:first-child h3 { color: var(--green); }
    .contrast-column:last-child h3 { color: var(--accent-strong); }
    .check-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
    .check-list li { display: flex; gap: 11px; color: #c3ccd6; font-size: 14px; }
    .check-list li::before { content: "•"; color: var(--accent); font-size: 18px; line-height: 1.3; }

    .milestone-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .milestone { position: relative; padding: 0 22px 0 0; }
    .milestone:not(:last-child)::after {
      content: "";
      position: absolute;
      top: 11px;
      left: 13px;
      right: 0;
      height: 1px;
      background: var(--line);
    }
    .milestone-dot {
      position: relative;
      z-index: 1;
      width: 24px;
      height: 24px;
      display: grid;
      place-items: center;
      margin-bottom: 17px;
      border: 1px solid rgba(230,182,107,.45);
      border-radius: 50%;
      color: var(--accent-strong);
      background: var(--bg);
      font-size: 10px;
    }
    .milestone h3 { margin-bottom: 7px; font-size: 16px; }
    .milestone p { margin: 0; color: var(--muted); font-size: 13px; }

    .update-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 20px; }
    .update-feature {
      min-height: 275px;
      display: flex;
      flex-direction: column;
      justify-content: end;
      padding: 27px;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background:
        linear-gradient(0deg, rgba(12,16,22,.94), rgba(12,16,22,.10) 85%),
        url("https://images.unsplash.com/photo-1524504388940-b1c1722653e1?auto=format&fit=crop&w=1200&q=85") center 35%/cover;
    }
    .update-feature h3 { margin: 10px 0 7px; font-size: 23px; }
    .update-feature p { max-width: 500px; margin: 0; color: #d0d5dc; font-size: 13px; }
    .badge {
      width: fit-content;
      padding: 5px 9px;
      border: 1px solid rgba(230,182,107,.34);
      border-radius: 999px;
      color: var(--accent-strong);
      background: rgba(13,17,23,.65);
      font-size: 11px;
    }
    .update-list { display: grid; align-content: start; }
    .update-entry { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .update-entry:first-child { padding-top: 3px; }
    .update-entry h3 { margin: 0 0 5px; font-size: 15px; }
    .update-entry p { margin: 0; color: var(--muted); font-size: 12px; }

    .assurance-band {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 22px;
      padding: 26px;
      border-left: 2px solid var(--accent);
      background: rgba(255,255,255,.035);
    }
    .assurance-item strong { display: block; margin-bottom: 5px; font-size: 15px; }
    .assurance-item span { color: var(--muted); font-size: 12px; }

    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    details.faq {
      border: 1px solid var(--line);
      border-radius: 13px;
      background: var(--panel);
    }
    details.faq summary {
      position: relative;
      padding: 17px 45px 17px 18px;
      cursor: pointer;
      font-size: 14px;
      font-weight: 700;
      list-style: none;
    }
    details.faq summary::-webkit-details-marker { display: none; }
    details.faq summary::after {
      content: "+";
      position: absolute;
      top: 14px;
      right: 18px;
      color: var(--accent);
      font-size: 20px;
      font-weight: 400;
    }
    details.faq[open] summary::after { content: "−"; }
    .faq-answer { padding: 0 18px 18px; color: var(--muted); font-size: 13px; line-height: 1.8; }

    .closing {
      padding: 44px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
      border: 1px solid rgba(230,182,107,.25);
      border-radius: var(--radius);
      background: linear-gradient(110deg, rgba(230,182,107,.10), rgba(159,201,180,.04));
    }
    .closing h2 { margin-bottom: 7px; font-size: 25px; }
    .closing p { max-width: 620px; margin: 0; color: var(--muted); font-size: 14px; }

    footer { padding: 48px 0 22px; background: rgba(0,0,0,.16); }
    .footer-top { display: flex; justify-content: space-between; gap: 40px; padding-bottom: 30px; }
    .footer-copy { max-width: 520px; margin: 15px 0 0; color: var(--muted); font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 18px; align-items: center; color: var(--muted); font-size: 13px; }
    .footer-links a { transition: color .2s ease; }
    .footer-links a:hover { color: var(--accent-strong); }
    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      padding-top: 18px;
      border-top: 1px solid var(--line);
      color: var(--subtle);
      font-size: 12px;
    }
    .age-note { color: var(--muted); }

    @media (max-width: 900px) {
      .nav-badge { display: none; }
      .topic-layout, .editorial-layout, .update-grid { grid-template-columns: 1fr; }
      .editorial-aside { position: static; }
      .style-grid { grid-template-columns: repeat(2, 1fr); }
      .milestone-list { grid-template-columns: repeat(2, 1fr); row-gap: 28px; }
      .milestone:nth-child(2)::after { display: none; }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--content), calc(100% - 32px)); }
      .nav-shell { min-height: 68px; gap: 12px; }
      .brand-text { max-width: 220px; overflow: hidden; text-overflow: ellipsis; font-size: 13px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-links {
        position: absolute;
        top: calc(100% + 1px);
        left: 0;
        right: 0;
        display: none;
        align-items: stretch;
        padding: 12px 16px 16px;
        border-bottom: 1px solid var(--line);
        background: rgba(13,17,23,.98);
      }
      .nav-links.is-open { display: flex; flex-direction: column; }
      .nav-links a { padding: 12px 14px; }
      .hero { min-height: 400px; background-position: 58% center; }
      .hero-content { padding: 52px 0 42px; }
      .hero-copy { font-size: 14px; }
      .section { padding: 54px 0; }
      .section-head { display: block; }
      .section-lead { margin-top: 12px; }
      .metric-strip { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .style-grid, .faq-list { grid-template-columns: 1fr; }
      .contrast { grid-template-columns: 1fr; }
      .assurance-band { grid-template-columns: 1fr; gap: 18px; }
      .closing { align-items: flex-start; flex-direction: column; padding: 28px; }
      .footer-top { flex-direction: column; gap: 23px; }
      .copyright { flex-direction: column; gap: 7px; }
    }
    @media (max-width: 520px) {
      .container { width: calc(100% - 28px); }
      .brand { gap: 8px; }
      .brand-mark { width: 31px; height: 31px; }
      .brand-text { max-width: 190px; font-size: 12px; }
      .hero h1 { font-size: 32px; }
      .section-title { font-size: 24px; }
      .metric { min-height: 96px; padding: 17px; }
      .metric strong { font-size: 22px; }
      .topic-feature { min-height: 230px; padding: 22px; }
      .topic-feature h3 { font-size: 21px; }
      .editorial-item { grid-template-columns: 34px 1fr; gap: 12px; }
      .editorial-meta { grid-column: 2; }
      .milestone-list { grid-template-columns: 1fr; row-gap: 21px; }
      .milestone::after { display: none !important; }
      .footer-links { gap: 14px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
    }