/* roulang page: index */
:root {
      color-scheme: light;
      --ink: #17211c;
      --ink-soft: #35433a;
      --muted: #69766e;
      --paper: #f7f8f5;
      --surface: #ffffff;
      --surface-tint: #edf3ed;
      --line: #dce4dc;
      --green: #296c4b;
      --green-deep: #174d37;
      --lime: #d8ef8a;
      --coral: #ee846d;
      --gold: #e8bd67;
      --shadow: 0 18px 48px rgba(20, 43, 30, .11);
      --shadow-soft: 0 8px 24px rgba(20, 43, 30, .08);
      --radius: 18px;
      --radius-lg: 28px;
      --container: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 92px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    img { display: block; max-width: 100%; }
    a { color: inherit; text-decoration: none; }
    button, input { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    a:focus-visible, button:focus-visible, input:focus-visible {
      outline: 3px solid rgba(41, 108, 75, .38);
      outline-offset: 3px;
    }
    ::selection { background: var(--lime); color: var(--ink); }

    .container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 50;
      top: 0;
      border-bottom: 1px solid rgba(220, 228, 220, .78);
      background: rgba(255, 255, 255, .94);
      backdrop-filter: blur(16px);
    }
    .nav-wrap { min-height: 76px; display: flex; align-items: center; gap: 34px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 800; font-size: 20px; letter-spacing: 0; }
    .brand-mark {
      display: grid; place-items: center; width: 38px; height: 38px;
      color: #163f2d; background: var(--lime); border-radius: 13px;
      box-shadow: inset 0 -3px 0 rgba(23, 77, 55, .12);
    }
    .brand-mark svg { width: 21px; height: 21px; }
    .main-nav { display: flex; align-items: center; gap: 8px; margin-left: auto; }
    .nav-link {
      position: relative; padding: 9px 15px; color: var(--muted); font-size: 14px;
      font-weight: 650; border-radius: 999px; transition: color .2s, background .2s;
    }
    .nav-link:hover, .nav-link.active { color: var(--green-deep); background: #eff5ee; }
    .nav-link.active::after {
      position: absolute; bottom: 3px; left: 50%; width: 4px; height: 4px;
      content: ""; border-radius: 50%; background: var(--green); transform: translateX(-50%);
    }
    .nav-actions { display: flex; align-items: center; gap: 12px; }
    .search-form {
      display: flex; align-items: center; gap: 8px; width: 196px; height: 42px;
      padding: 0 13px; border: 1px solid var(--line); border-radius: 999px; background: #fff;
      transition: border-color .2s, box-shadow .2s;
    }
    .search-form:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px rgba(41, 108, 75, .1); }
    .search-form svg { width: 17px; height: 17px; color: var(--muted); flex: 0 0 auto; }
    .search-form input { width: 100%; min-width: 0; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: 13px; }
    .search-form input::placeholder { color: #94a098; }
    .icon-button {
      display: none; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line);
      border-radius: 50%; background: white; color: var(--ink); cursor: pointer;
    }

    .hero {
      position: relative; isolation: isolate; min-height: 620px; overflow: hidden;
      display: flex; align-items: center; color: white; background: #1d3327;
    }
    .hero-media { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 48%; }
    .hero::before {
      position: absolute; z-index: -1; inset: 0; content: "";
      background: linear-gradient(90deg, rgba(10, 25, 18, .88) 0%, rgba(15, 36, 25, .66) 46%, rgba(14, 31, 22, .18) 100%),
                  linear-gradient(0deg, rgba(9, 22, 15, .38), transparent 54%);
    }
    .hero-inner { padding-block: 90px 100px; }
    .hero-copy { max-width: 720px; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 9px; color: #e1f1dc; font-size: 13px;
      font-weight: 700; letter-spacing: 0;
    }
    .eyebrow::before { width: 26px; height: 2px; content: ""; background: var(--lime); }
    h1 { margin: 21px 0 20px; max-width: 700px; font-size: clamp(42px, 5vw, 68px); line-height: 1.16; letter-spacing: 0; font-weight: 800; }
    .hero-copy p { max-width: 670px; margin: 0; color: rgba(255,255,255,.86); font-size: 17px; line-height: 1.95; }
    .hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 13px; margin-top: 30px; }
    .button {
      min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
      padding: 0 21px; border: 1px solid transparent; border-radius: 999px; font-size: 14px;
      font-weight: 750; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
    }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #173c2c; background: var(--lime); box-shadow: 0 8px 20px rgba(216, 239, 138, .18); }
    .button-primary:hover { background: #e4f5a8; box-shadow: 0 12px 28px rgba(216, 239, 138, .25); }
    .button-ghost { color: white; border-color: rgba(255,255,255,.42); background: rgba(255,255,255,.08); }
    .button-ghost:hover { background: rgba(255,255,255,.17); border-color: rgba(255,255,255,.7); }
    .button svg { width: 17px; height: 17px; }
    .hero-note { display: flex; align-items: center; gap: 11px; margin-top: 34px; color: rgba(255,255,255,.76); font-size: 12px; }
    .note-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 5px rgba(216,239,138,.14); }

    .trust-strip { position: relative; margin-top: -1px; background: var(--green-deep); color: white; }
    .trust-inner { min-height: 90px; display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; }
    .trust-item { display: flex; justify-content: center; align-items: center; gap: 11px; padding: 12px; border-right: 1px solid rgba(255,255,255,.16); }
    .trust-item:last-child { border: 0; }
    .trust-icon { display: grid; place-items: center; width: 34px; height: 34px; color: var(--lime); background: rgba(255,255,255,.09); border-radius: 11px; }
    .trust-icon svg { width: 18px; height: 18px; }
    .trust-item strong { display: block; font-size: 13px; line-height: 1.4; }
    .trust-item span { display: block; color: rgba(255,255,255,.65); font-size: 11px; }

    .section { padding: 92px 0; }
    .section-white { background: var(--surface); }
    .section-tint { background: var(--surface-tint); }
    .section-dark { color: white; background: #182b20; }
    .section-head { max-width: 720px; margin-bottom: 38px; }
    .section-head.center { margin-inline: auto; text-align: center; }
    .kicker { display: inline-block; margin-bottom: 10px; color: var(--green); font-size: 12px; font-weight: 800; }
    .section-dark .kicker { color: var(--lime); }
    h2 { margin: 0; font-size: clamp(28px, 3vw, 40px); line-height: 1.32; letter-spacing: 0; font-weight: 800; }
    .section-head p, .section-intro { margin: 15px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
    .section-dark .section-head p { color: rgba(255,255,255,.7); }

    .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .feature-card {
      min-height: 230px; padding: 27px; border: 1px solid var(--line); border-radius: var(--radius);
      background: white; transition: transform .22s, box-shadow .22s, border-color .22s;
    }
    .feature-card:hover { transform: translateY(-4px); border-color: #b7cbb9; box-shadow: var(--shadow-soft); }
    .feature-number { color: #86a38d; font-size: 12px; font-weight: 800; }
    .feature-card h3 { margin: 22px 0 8px; font-size: 19px; line-height: 1.45; }
    .feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
    .feature-card:nth-child(2) { background: #eff5e9; }
    .feature-card:nth-child(3) { background: #fdf2ec; }

    .scene-layout { display: grid; grid-template-columns: .86fr 1.14fr; gap: 64px; align-items: center; }
    .scene-copy p { margin: 18px 0 24px; color: var(--muted); line-height: 1.95; }
    .check-list { display: grid; gap: 13px; margin: 0; padding: 0; list-style: none; }
    .check-list li { display: flex; align-items: flex-start; gap: 11px; color: var(--ink-soft); font-size: 14px; }
    .check-mark { flex: 0 0 auto; display: grid; place-items: center; width: 22px; height: 22px; margin-top: 2px; border-radius: 50%; color: var(--green-deep); background: #dcefc9; font-size: 13px; font-weight: 900; }
    .scene-image { position: relative; overflow: hidden; aspect-ratio: 1.26; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
    .scene-image img { width: 100%; height: 100%; object-fit: cover; }
    .image-caption {
      position: absolute; right: 18px; bottom: 18px; left: 18px; display: flex; justify-content: space-between;
      align-items: center; gap: 12px; padding: 13px 16px; color: white; border: 1px solid rgba(255,255,255,.22);
      border-radius: 14px; background: rgba(21, 38, 29, .72); backdrop-filter: blur(10px); font-size: 12px;
    }
    .image-caption strong { font-size: 13px; }

    .fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .fit-panel { padding: 30px; border-radius: var(--radius); background: white; border: 1px solid var(--line); }
    .fit-panel.not-fit { background: #fbf2ef; border-color: #f1d8d0; }
    .fit-title { display: flex; align-items: center; gap: 12px; margin-bottom: 19px; }
    .fit-symbol { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 12px; color: var(--green); background: #e6f0e2; font-weight: 900; }
    .not-fit .fit-symbol { color: #9a5747; background: #f8dfd7; }
    .fit-title h3 { margin: 0; font-size: 18px; }
    .fit-panel p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
    .fit-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 19px; }
    .tag { display: inline-flex; align-items: center; min-height: 29px; padding: 3px 11px; border: 1px solid #d8e4d6; border-radius: 999px; color: #46644e; background: #f7faf5; font-size: 12px; font-weight: 650; }

    .solution-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 55px; align-items: start; }
    .solution-aside { position: sticky; top: 108px; }
    .solution-aside p { color: rgba(255,255,255,.69); font-size: 14px; line-height: 1.9; }
    .solution-list { border-top: 1px solid rgba(255,255,255,.2); }
    .solution-row { display: grid; grid-template-columns: 54px 1fr auto; gap: 18px; align-items: center; padding: 22px 0; border-bottom: 1px solid rgba(255,255,255,.2); }
    .solution-index { color: var(--lime); font-size: 13px; font-weight: 800; }
    .solution-row h3 { margin: 0 0 4px; font-size: 17px; }
    .solution-row p { margin: 0; color: rgba(255,255,255,.65); font-size: 13px; line-height: 1.75; }
    .solution-label { padding: 6px 11px; border: 1px solid rgba(216,239,138,.4); border-radius: 999px; color: var(--lime); font-size: 11px; white-space: nowrap; }

    .entry-band { padding: 78px 0; background: #e5efdc; }
    .entry-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 30px; }
    .entry-head p { max-width: 490px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
    .entry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
    .entry-card {
      min-height: 180px; position: relative; display: flex; flex-direction: column; justify-content: space-between;
      padding: 22px; border: 1px solid rgba(41,108,75,.16); border-radius: 16px; background: rgba(255,255,255,.72);
      transition: background .2s, transform .2s, box-shadow .2s;
    }
    .entry-card:hover { transform: translateY(-3px); background: white; box-shadow: var(--shadow-soft); }
    .entry-card small { color: var(--green); font-size: 11px; font-weight: 800; }
    .entry-card h3 { margin: 13px 0 4px; font-size: 17px; }
    .entry-card p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
    .entry-arrow { position: absolute; right: 20px; bottom: 19px; color: var(--green); font-size: 19px; }

    .editorial-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: stretch; }
    .editorial-feature { position: relative; min-height: 450px; overflow: hidden; border-radius: var(--radius-lg); background: #26372d; }
    .editorial-feature img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .6s; }
    .editorial-feature:hover img { transform: scale(1.035); }
    .editorial-feature::after { position: absolute; inset: 0; content: ""; background: linear-gradient(0deg, rgba(11,22,16,.84), rgba(11,22,16,.02) 72%); }
    .editorial-overlay { position: absolute; z-index: 1; right: 28px; bottom: 28px; left: 28px; color: white; }
    .editorial-overlay .tag { color: #eff8dc; border-color: rgba(239,248,220,.45); background: rgba(255,255,255,.12); }
    .editorial-overlay h3 { max-width: 430px; margin: 15px 0 8px; font-size: 25px; line-height: 1.4; }
    .editorial-overlay p { max-width: 480px; margin: 0; color: rgba(255,255,255,.79); font-size: 13px; line-height: 1.8; }
    .article-list { display: grid; align-content: start; }
    .article-item { display: grid; grid-template-columns: 92px 1fr; gap: 19px; padding: 21px 0; border-bottom: 1px solid var(--line); }
    .article-item:first-child { padding-top: 4px; }
    .article-thumb { width: 92px; height: 80px; overflow: hidden; border-radius: 12px; background: #dfe8df; }
    .article-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
    .article-item:hover .article-thumb img { transform: scale(1.06); }
    .article-meta { color: var(--green); font-size: 11px; font-weight: 750; }
    .article-item h3 { margin: 4px 0 5px; font-size: 15px; line-height: 1.5; }
    .article-item p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.65; }

    .quote-band { padding: 72px 0; color: white; background: linear-gradient(115deg, #1c523b, #287451 55%, #a9bd55); }
    .quote-inner { display: grid; grid-template-columns: 1fr 260px; gap: 45px; align-items: center; }
    .quote-mark { color: var(--lime); font-family: Georgia, serif; font-size: 68px; line-height: .7; }
    blockquote { max-width: 760px; margin: 0; font-size: clamp(21px, 2.5vw, 30px); line-height: 1.7; font-weight: 650; }
    .quote-credit { margin-top: 17px; color: rgba(255,255,255,.75); font-size: 13px; }
    .quote-stat { padding-left: 26px; border-left: 1px solid rgba(255,255,255,.32); }
    .quote-stat strong { display: block; color: var(--lime); font-size: 38px; line-height: 1.2; }
    .quote-stat span { color: rgba(255,255,255,.75); font-size: 12px; }

    .compare-grid { display: grid; grid-template-columns: 1fr 1fr; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: white; }
    .compare-column { padding: 28px 30px; }
    .compare-column + .compare-column { border-left: 1px solid var(--line); background: #eff5e9; }
    .compare-column h3 { display: flex; align-items: center; gap: 10px; margin: 0 0 18px; font-size: 17px; }
    .compare-badge { display: grid; place-items: center; width: 28px; height: 28px; border-radius: 9px; color: white; background: #86928a; font-size: 12px; }
    .compare-column + .compare-column .compare-badge { color: #173c2c; background: var(--lime); }
    .compare-column ul { display: grid; gap: 13px; margin: 0; padding: 0; list-style: none; }
    .compare-column li { display: flex; gap: 10px; color: var(--muted); font-size: 13px; }
    .compare-column li span { flex: 0 0 auto; color: var(--green); font-weight: 900; }

    .proof-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 52px; align-items: center; }
    .proof-image { overflow: hidden; aspect-ratio: 1.05; border-radius: var(--radius-lg); }
    .proof-image img { width: 100%; height: 100%; object-fit: cover; }
    .proof-copy p { margin: 17px 0 24px; color: var(--muted); font-size: 14px; line-height: 1.9; }
    .proof-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .proof-point { padding: 15px; border: 1px solid var(--line); border-radius: 13px; background: #fff; }
    .proof-point strong { display: block; margin-bottom: 4px; font-size: 14px; }
    .proof-point span { color: var(--muted); font-size: 11px; line-height: 1.6; }

    .topic-grid { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 16px; }
    .topic-card { min-height: 210px; position: relative; overflow: hidden; display: flex; flex-direction: column; justify-content: end; padding: 24px; border-radius: 16px; color: white; background: #284c37; }
    .topic-card:nth-child(2) { background: #9c604d; }
    .topic-card:nth-child(3) { background: #527673; }
    .topic-card:nth-child(4) { background: #344952; }
    .topic-card:nth-child(5) { background: #7d6a43; }
    .topic-card::before { position: absolute; inset: 0; content: ""; opacity: .7; background: linear-gradient(0deg, rgba(8,20,13,.72), transparent 85%); }
    .topic-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .82; transition: transform .45s; }
    .topic-card:hover img { transform: scale(1.05); }
    .topic-content { position: relative; z-index: 1; }
    .topic-content small { color: rgba(255,255,255,.75); font-size: 11px; }
    .topic-content h3 { margin: 6px 0 2px; font-size: 19px; }
    .topic-content p { margin: 0; color: rgba(255,255,255,.78); font-size: 12px; }
    .topic-card:first-child { grid-row: span 2; min-height: 436px; }

    .standards-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
    .standard-item { padding: 22px 20px; border-top: 3px solid var(--green); background: #fff; }
    .standard-item:nth-child(2) { border-color: var(--coral); }
    .standard-item:nth-child(3) { border-color: #9aac52; }
    .standard-item:nth-child(4) { border-color: #e0b14e; }
    .standard-item h3 { margin: 0 0 8px; font-size: 15px; }
    .standard-item p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.8; }

    .closing { padding: 73px 0; background: #e8f0e5; }
    .closing-inner { display: flex; justify-content: space-between; align-items: center; gap: 30px; }
    .closing-copy { max-width: 710px; }
    .closing-copy h2 { font-size: 30px; }
    .closing-copy p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }

    .site-footer { color: rgba(255,255,255,.76); background: #111a15; }
    .footer-main { display: grid; grid-template-columns: 1.4fr .8fr .8fr; gap: 50px; padding: 56px 0 43px; }
    .footer-brand { color: white; }
    .footer-about { max-width: 390px; margin: 17px 0 0; color: rgba(255,255,255,.58); font-size: 13px; line-height: 1.85; }
    .footer-col h3 { margin: 0 0 13px; color: white; font-size: 13px; }
    .footer-links { display: grid; gap: 8px; }
    .footer-links a { width: fit-content; color: rgba(255,255,255,.62); font-size: 12px; transition: color .2s; }
    .footer-links a:hover { color: var(--lime); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding: 18px 0; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.45); font-size: 11px; }
    .footer-bottom a { color: rgba(255,255,255,.55); }
    .footer-bottom a:hover { color: white; }

    .mobile-tabs { display: none; }
    .toast {
      position: fixed; z-index: 100; right: 20px; bottom: 24px; max-width: min(380px, calc(100% - 40px));
      padding: 13px 17px; border-radius: 12px; color: white; background: #1d3929; box-shadow: var(--shadow);
      opacity: 0; transform: translateY(12px); pointer-events: none; transition: opacity .2s, transform .2s; font-size: 13px;
    }
    .toast.visible { opacity: 1; transform: translateY(0); }

    @media (max-width: 1024px) {
      .nav-wrap { gap: 18px; }
      .search-form { width: 164px; }
      .hero { min-height: 580px; }
      .scene-layout, .proof-layout { gap: 36px; }
      .entry-grid { grid-template-columns: repeat(2, 1fr); }
      .standards-grid { grid-template-columns: repeat(2, 1fr); }
      .topic-grid { grid-template-columns: 1fr 1fr; }
      .topic-card:first-child { grid-row: span 2; }
    }
    @media (max-width: 768px) {
      html { scroll-padding-top: 72px; }
      .container { width: min(100% - 36px, var(--container)); }
      .nav-wrap { min-height: 68px; }
      .brand { font-size: 18px; }
      .brand-mark { width: 35px; height: 35px; }
      .main-nav { gap: 1px; }
      .nav-link { padding: 8px 11px; font-size: 13px; }
      .nav-actions .search-form { display: none; }
      .hero { min-height: 570px; }
      .hero-inner { padding-block: 75px 88px; }
      .hero-copy { max-width: 630px; }
      .hero-copy p { font-size: 15px; }
      .trust-inner { grid-template-columns: 1fr 1fr; padding: 10px 0; }
      .trust-item { justify-content: flex-start; padding: 12px 20px; border-right: 0; }
      .trust-item:nth-child(odd) { border-right: 1px solid rgba(255,255,255,.16); }
      .section { padding: 70px 0; }
      .feature-grid { grid-template-columns: 1fr 1fr; }
      .feature-card:last-child { grid-column: span 2; min-height: auto; }
      .scene-layout, .proof-layout { grid-template-columns: 1fr; }
      .scene-image { order: -1; }
      .solution-layout { grid-template-columns: 1fr; gap: 25px; }
      .solution-aside { position: static; }
      .entry-head { display: block; }
      .entry-head p { margin-top: 12px; }
      .editorial-layout { grid-template-columns: 1fr; }
      .editorial-feature { min-height: 390px; }
      .quote-inner { grid-template-columns: 1fr 180px; gap: 25px; }
      .quote-stat { padding-left: 18px; }
      .topic-card:first-child { min-height: 380px; }
      .closing-inner { align-items: flex-start; flex-direction: column; }
      .footer-main { grid-template-columns: 1fr 1fr; gap: 35px; }
      .footer-main > div:first-child { grid-column: span 2; }
      .mobile-tabs {
        position: fixed; z-index: 60; right: 12px; bottom: 10px; left: 12px;
        display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; padding: 8px;
        border: 1px solid rgba(220,228,220,.9); border-radius: 19px; background: rgba(255,255,255,.96);
        box-shadow: 0 10px 32px rgba(20,43,30,.18); backdrop-filter: blur(14px);
      }
      .mobile-tab {
        display: flex; justify-content: center; align-items: center; gap: 8px; min-height: 43px;
        border-radius: 13px; color: var(--muted); font-size: 13px; font-weight: 700; transition: background .2s, color .2s;
      }
      .mobile-tab svg { width: 17px; height: 17px; }
      .mobile-tab.active { color: var(--green-deep); background: #eaf2e7; }
      body { padding-bottom: 76px; }
    }
    @media (max-width: 520px) {
      .container { width: calc(100% - 32px); }
      .nav-wrap { min-height: 64px; gap: 10px; }
      .brand { gap: 8px; font-size: 16px; }
      .brand-mark { width: 32px; height: 32px; border-radius: 11px; }
      .main-nav { margin-left: auto; }
      .nav-link { padding: 7px 9px; font-size: 12px; }
      .nav-link.active::after { bottom: 1px; }
      .nav-actions { display: none; }
      .hero { min-height: 615px; align-items: end; }
      .hero-media { object-position: 59% center; }
      .hero::before { background: linear-gradient(0deg, rgba(9,22,15,.9) 0%, rgba(9,22,15,.63) 55%, rgba(9,22,15,.2) 100%); }
      .hero-inner { padding-block: 90px 62px; }
      .eyebrow { font-size: 11px; }
      h1 { margin: 17px 0 15px; font-size: 42px; }
      .hero-copy p { font-size: 14px; line-height: 1.85; }
      .hero-actions { gap: 9px; margin-top: 23px; }
      .button { min-height: 45px; padding-inline: 16px; font-size: 12px; }
      .hero-note { margin-top: 24px; font-size: 11px; }
      .trust-inner { width: 100%; }
      .trust-item { gap: 8px; padding: 11px 16px; }
      .trust-icon { width: 30px; height: 30px; }
      .trust-item strong { font-size: 11px; }
      .trust-item span { font-size: 10px; }
      .section { padding: 58px 0; }
      .section-head { margin-bottom: 27px; }
      h2 { font-size: 28px; }
      .section-head p, .section-intro { font-size: 13px; }
      .feature-grid { grid-template-columns: 1fr; gap: 11px; }
      .feature-card, .feature-card:last-child { grid-column: auto; min-height: 0; padding: 22px; }
      .feature-card h3 { margin-top: 14px; }
      .scene-layout { gap: 25px; }
      .scene-image { aspect-ratio: 1.05; border-radius: 20px; }
      .image-caption { right: 10px; bottom: 10px; left: 10px; padding: 10px 12px; font-size: 10px; }
      .image-caption strong { font-size: 11px; }
      .fit-grid { grid-template-columns: 1fr; gap: 12px; }
      .fit-panel { padding: 22px; }
      .solution-row { grid-template-columns: 35px 1fr; gap: 10px; padding: 18px 0; }
      .solution-row h3 { font-size: 15px; }
      .solution-row p { font-size: 12px; }
      .solution-label { grid-column: 2; justify-self: start; }
      .entry-band { padding: 58px 0; }
      .entry-grid { gap: 9px; }
      .entry-card { min-height: 166px; padding: 16px; }
      .entry-card h3 { font-size: 15px; }
      .entry-card p { font-size: 11px; }
      .editorial-feature { min-height: 360px; border-radius: 20px; }
      .editorial-overlay { right: 20px; bottom: 20px; left: 20px; }
      .editorial-overlay h3 { font-size: 21px; }
      .article-item { grid-template-columns: 76px 1fr; gap: 13px; padding: 17px 0; }
      .article-thumb { width: 76px; height: 72px; }
      .article-item h3 { font-size: 13px; }
      .article-item p { font-size: 11px; }
      .quote-band { padding: 54px 0; }
      .quote-inner { grid-template-columns: 1fr; gap: 20px; }
      .quote-mark { font-size: 52px; }
      blockquote { font-size: 21px; }
      .quote-stat { padding: 14px 0 0; border-top: 1px solid rgba(255,255,255,.32); border-left: 0; }
      .quote-stat strong { font-size: 30px; }
      .compare-grid { grid-template-columns: 1fr; }
      .compare-column { padding: 22px; }
      .compare-column + .compare-column { border-top: 1px solid var(--line); border-left: 0; }
      .proof-points { grid-template-columns: 1fr 1fr; gap: 8px; }
      .proof-point { padding: 12px; }
      .proof-point strong { font-size: 12px; }
      .proof-point span { font-size: 10px; }
      .topic-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
      .topic-card { min-height: 175px; padding: 16px; border-radius: 13px; }
      .topic-card:first-child { grid-row: auto; grid-column: span 2; min-height: 240px; }
      .topic-content h3 { font-size: 16px; }
      .topic-content p { font-size: 10px; }
      .standards-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
      .standard-item { padding: 16px 14px; }
      .standard-item h3 { font-size: 13px; }
      .standard-item p { font-size: 10px; }
      .closing { padding: 53px 0; }
      .closing-copy h2 { font-size: 25px; }
      .closing-copy p { font-size: 12px; }
      .footer-main { grid-template-columns: 1fr 1fr; gap: 27px 18px; padding: 42px 0 31px; }
      .footer-about { font-size: 12px; }
      .footer-bottom { flex-direction: column; gap: 7px; font-size: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
    }

/* roulang page: category1 */
:root {
 color-scheme: light;
 --ink: #17211c;
 --ink-soft: #35433a;
 --muted: #69766e;
 --paper: #f7f8f5;
 --surface: #ffffff;
 --surface-tint: #edf3ed;
 --line: #dce4dc;
 --green: #296c4b;
 --green-deep: #174d37;
 --lime: #d8ef8a;
 --coral: #ee846d;
 --gold: #e8bd67;
 --shadow: 0 18px 48px rgba(20, 43, 30, .11);
 --shadow-soft: 0 8px 24px rgba(20, 43, 30, .08);
 --radius: 18px;
 --radius-lg: 28px;
 --container: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
 margin: 0;
 background: var(--paper);
 color: var(--ink);
 font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
 font-size: 16px;
 line-height: 1.75;
 -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, input:focus-visible {
 outline: 3px solid rgba(41, 108, 75, .38);
 outline-offset: 3px;
}
.container { width: min(var(--container), calc(100% - 48px)); margin-inline: auto; }
.site-header {
 position: sticky;
 z-index: 50;
 top: 0;
 border-bottom: 1px solid rgba(220, 228, 220, .78);
 background: rgba(255, 255, 255, .94);
 backdrop-filter: blur(16px);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; gap: 34px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 800; font-size: 20px; }
.brand-mark {
 display: grid; place-items: center; width: 38px; height: 38px;
 color: #163f2d; background: var(--lime); border-radius: 13px;
 box-shadow: inset 0 -3px 0 rgba(23, 77, 55, .12);
}
.brand-mark svg { width: 21px; height: 21px; }
.main-nav { display: flex; align-items: center; gap: 8px; margin-left: auto; }
.nav-link {
 position: relative; padding: 9px 15px; color: var(--muted); font-size: 14px;
 font-weight: 650; border-radius: 999px; transition: color .2s, background .2s;
}
.nav-link:hover, .nav-link.active { color: var(--green-deep); background: #eff5ee; }
.nav-link.active::after {
 position: absolute; bottom: 3px; left: 50%; width: 4px; height: 4px;
 content: ""; border-radius: 50%; background: var(--green); transform: translateX(-50%);
}
.nav-actions { display: flex; align-items: center; gap: 12px; }
.search-form {
 display: flex; align-items: center; gap: 8px; width: 196px; height: 42px;
 padding: 0 13px; border: 1px solid var(--line); border-radius: 999px; background: #fff;
 transition: border-color .2s, box-shadow .2s;
}
.search-form:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px rgba(41, 108, 75, .1); }
.search-form svg { width: 17px; height: 17px; color: var(--muted); flex: 0 0 auto; }
.search-form input { width: 100%; min-width: 0; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: 13px; }
.search-form input::placeholder { color: #94a098; }
.icon-button {
 display: none; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line);
 border-radius: 50%; background: white; color: var(--ink); cursor: pointer;
}
.hero {
 position: relative; isolation: isolate; min-height: 510px; overflow: hidden;
 display: flex; align-items: end; color: white; background: #1d3327;
}
.hero-media { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center 48%; }
.hero::before {
 position: absolute; z-index: -1; inset: 0; content: "";
 background: linear-gradient(90deg, rgba(10, 25, 18, .88) 0%, rgba(15, 36, 25, .60) 48%, rgba(14, 31, 22, .16) 100%),
 linear-gradient(0deg, rgba(9, 22, 15, .48), transparent 64%);
}
.hero-inner { width: 100%; padding-block: 76px 68px; }
.hero-copy { max-width: 700px; }
.eyebrow {
 display: inline-flex; align-items: center; gap: 9px; color: #e1f1dc; font-size: 13px;
 font-weight: 700;
}
.eyebrow::before { width: 26px; height: 2px; content: ""; background: var(--lime); }
.hero h1 { max-width: 680px; margin: 18px 0 17px; font-size: clamp(36px, 5vw, 60px); line-height: 1.2; font-weight: 800; }
.hero-copy p { max-width: 650px; margin: 0; color: rgba(255,255,255,.86); font-size: 17px; line-height: 1.95; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 13px; margin-top: 27px; }
.button {
 min-height: 48px; display: inline-flex; align-items: center; justify-content: center; gap: 9px;
 padding: 0 21px; border: 1px solid transparent; border-radius: 999px; font-size: 14px;
 font-weight: 750; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s, border-color .2s;
}
.button:hover { transform: translateY(-2px); }
.button-primary { color: #173c2c; background: var(--lime); box-shadow: 0 8px 20px rgba(216, 239, 138, .18); }
.button-primary:hover { background: #e4f5a8; box-shadow: 0 12px 28px rgba(216, 239, 138, .25); }
.button-ghost { color: white; border-color: rgba(255,255,255,.42); background: rgba(255,255,255,.08); }
.button-ghost:hover { background: rgba(255,255,255,.17); border-color: rgba(255,255,255,.7); }
.button svg { width: 17px; height: 17px; }
.section { padding: 78px 0; }
.section-white { background: var(--surface); }
.section-tint { background: var(--surface-tint); }
.section-dark { color: white; background: #182b20; }
.section-head { max-width: 720px; margin-bottom: 34px; }
.section-head.center { margin-inline: auto; text-align: center; }
.kicker { color: var(--green); font-size: 12px; font-weight: 800; }
.section-dark .kicker { color: var(--lime); }
.section-head h2 { margin: 8px 0 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.3; }
.section-head p, .section-intro { margin: 14px 0 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.section-dark .section-head p { color: rgba(255,255,255,.72); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card {
 min-height: 210px; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius);
 background: var(--surface); box-shadow: 0 4px 16px rgba(20,43,30,.035);
 transition: transform .22s, box-shadow .22s, border-color .22s;
}
.feature-card:hover { transform: translateY(-4px); border-color: #b7cbb9; box-shadow: var(--shadow-soft); }
.feature-index { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 13px; color: var(--green-deep); background: var(--surface-tint); font-size: 13px; font-weight: 800; }
.feature-card h3 { margin: 19px 0 8px; font-size: 19px; line-height: 1.4; }
.feature-card p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.tag-row { display: flex; flex-wrap: wrap; gap: 9px; }
.tag { display: inline-flex; align-items: center; padding: 7px 13px; border: 1px solid var(--line); border-radius: 999px; color: var(--ink-soft); background: rgba(255,255,255,.7); font-size: 13px; font-weight: 650; }
.tag:hover { border-color: #9fbaa5; color: var(--green-deep); background: white; }
.stat-band { display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(255,255,255,.16); border-radius: var(--radius); overflow: hidden; background: rgba(255,255,255,.045); }
.stat-item { padding: 23px 25px; border-right: 1px solid rgba(255,255,255,.14); }
.stat-item:last-child { border-right: 0; }
.stat-item strong { display: block; color: var(--lime); font-size: 23px; line-height: 1.3; }
.stat-item span { display: block; margin-top: 6px; color: rgba(255,255,255,.72); font-size: 13px; }
.split-layout { display: grid; grid-template-columns: .92fr 1.08fr; gap: 54px; align-items: center; }
.split-image { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; border-radius: var(--radius-lg); box-shadow: var(--shadow); }
.quote-block { margin: 0; padding: 26px 30px; border-left: 3px solid var(--coral); border-radius: 0 var(--radius) var(--radius) 0; background: var(--surface); color: var(--ink-soft); font-size: 18px; line-height: 1.9; }
.quote-block cite { display: block; margin-top: 12px; color: var(--muted); font-size: 13px; font-style: normal; }
.story-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.story-row { display: grid; grid-template-columns: 58px minmax(0, 1fr) auto; align-items: center; gap: 20px; padding: 19px 0; border-bottom: 1px solid var(--line); }
.story-no { color: #8a9a8f; font-size: 13px; font-weight: 800; }
.story-row h3 { margin: 0; font-size: 17px; }
.story-row p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.story-meta { color: var(--green); font-size: 12px; font-weight: 750; white-space: nowrap; }
.editorial-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 34px; align-items: stretch; }
.editorial-image { min-height: 370px; width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg); }
.editorial-copy { display: flex; flex-direction: column; justify-content: center; padding: 16px 0; }
.editorial-copy h3 { margin: 10px 0 12px; font-size: 27px; line-height: 1.4; }
.editorial-copy p { margin: 0; color: var(--muted); line-height: 1.95; }
.editorial-note { margin-top: 23px; padding: 15px 18px; border-radius: 0 13px 13px 0; border-left: 3px solid var(--gold); background: #fff8e8; color: #65532e; font-size: 14px; }
.cta-strip { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 31px 35px; border-radius: var(--radius-lg); color: white; background: linear-gradient(115deg, #174d37 0%, #296c4b 58%, #557b4c 100%); }
.cta-strip h2 { margin: 0; font-size: 25px; line-height: 1.4; }
.cta-strip p { margin: 7px 0 0; color: rgba(255,255,255,.76); font-size: 14px; }
.site-footer { color: rgba(255,255,255,.78); background: #14241b; }
.footer-main { display: grid; grid-template-columns: 1.5fr .8fr .8fr; gap: 65px; padding-block: 62px 48px; }
.footer-brand { color: white; }
.footer-brand .brand-mark { color: #163f2d; }
.footer-about { max-width: 390px; margin: 18px 0 0; color: rgba(255,255,255,.62); font-size: 14px; line-height: 1.9; }
.footer-col h3 { margin: 5px 0 17px; color: white; font-size: 14px; }
.footer-links { display: grid; gap: 10px; }
.footer-links a { width: fit-content; color: rgba(255,255,255,.63); font-size: 13px; transition: color .2s; }
.footer-links a:hover { color: var(--lime); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-block: 18px 24px; border-top: 1px solid rgba(255,255,255,.13); color: rgba(255,255,255,.48); font-size: 12px; }
.footer-bottom a { color: rgba(255,255,255,.7); }
.footer-bottom a:hover { color: var(--lime); }
.mobile-tabs { display: none; }
@media (max-width: 1024px) {
 .nav-wrap { gap: 20px; }
 .search-form { width: 170px; }
 .split-layout { gap: 32px; }
 .footer-main { gap: 35px; }
}
@media (max-width: 768px) {
 html { scroll-padding-top: 76px; }
 .container { width: min(var(--container), calc(100% - 36px)); }
 .nav-wrap { min-height: 68px; gap: 12px; }
 .brand { font-size: 18px; gap: 8px; }
 .brand-mark { width: 35px; height: 35px; border-radius: 12px; }
 .main-nav { gap: 2px; }
 .nav-link { padding: 8px 11px; font-size: 13px; }
 .search-form { width: 42px; padding: 0 11px; border-color: transparent; background: var(--surface-tint); }
 .search-form input { width: 0; padding: 0; opacity: 0; }
 .search-form:focus-within { position: absolute; right: 18px; width: min(260px, calc(100vw - 36px)); border-color: var(--green); background: white; }
 .search-form:focus-within input { width: 100%; opacity: 1; }
 .hero { min-height: 470px; }
 .hero-inner { padding-block: 65px 57px; }
 .hero-copy p { font-size: 15px; }
 .section { padding: 62px 0; }
 .feature-grid { grid-template-columns: repeat(2, 1fr); }
 .split-layout, .editorial-grid { grid-template-columns: 1fr; gap: 27px; }
 .split-image { aspect-ratio: 16 / 10; }
 .editorial-image { min-height: 290px; max-height: 390px; }
 .footer-main { grid-template-columns: 1.2fr 1fr 1fr; gap: 24px; }
}
@media (max-width: 520px) {
 body { padding-bottom: 66px; }
 .container { width: calc(100% - 32px); }
 .nav-wrap { min-height: 64px; gap: 7px; }
 .brand { font-size: 16px; gap: 7px; }
 .brand-mark { width: 32px; height: 32px; }
 .brand-mark svg { width: 19px; height: 19px; }
 .main-nav { margin-left: auto; }
 .nav-link { padding: 7px 9px; font-size: 12px; }
 .nav-link.active::after { bottom: 1px; }
 .nav-actions { display: none; }
 .hero { min-height: 490px; }
 .hero::before { background: linear-gradient(90deg, rgba(10,25,18,.84), rgba(15,36,25,.44)), linear-gradient(0deg, rgba(9,22,15,.5), transparent 65%); }
 .hero-inner { padding-block: 62px 49px; }
 .hero h1 { margin-top: 15px; font-size: 38px; }
 .hero-copy p { font-size: 14px; line-height: 1.85; }
 .hero-actions { gap: 9px; margin-top: 22px; }
 .button { min-height: 44px; padding-inline: 17px; font-size: 13px; }
 .section { padding: 52px 0; }
 .section-head { margin-bottom: 25px; }
 .section-head h2 { font-size: 27px; }
 .feature-grid { grid-template-columns: 1fr; gap: 12px; }
 .feature-card { min-height: 0; padding: 21px; }
 .stat-band { grid-template-columns: 1fr; }
 .stat-item { padding: 16px 19px; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.14); }
 .stat-item:last-child { border-bottom: 0; }
 .story-row { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; padding: 16px 0; }
 .story-meta { grid-column: 2; }
 .quote-block { padding: 21px; font-size: 16px; }
 .editorial-image { min-height: 230px; }
 .editorial-copy h3 { font-size: 23px; }
 .cta-strip { align-items: flex-start; flex-direction: column; padding: 25px 22px; gap: 18px; }
 .cta-strip h2 { font-size: 22px; }
 .footer-main { grid-template-columns: 1fr 1fr; gap: 30px 20px; padding-block: 43px 34px; }
 .footer-main > div:first-child { grid-column: 1 / -1; }
 .footer-bottom { flex-direction: column; gap: 7px; }
 .mobile-tabs {
  position: fixed; z-index: 60; right: 0; bottom: 0; left: 0;
  display: grid; grid-template-columns: repeat(2, 1fr); padding: 7px 12px calc(7px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line); background: rgba(255,255,255,.96); backdrop-filter: blur(14px);
 }
 .mobile-tabs a { display: grid; justify-items: center; gap: 1px; padding: 5px; color: var(--muted); font-size: 10px; font-weight: 700; }
 .mobile-tabs a[aria-current="page"] { color: var(--green-deep); }
 .mobile-tabs svg { width: 20px; height: 20px; }
}
@media (prefers-reduced-motion: reduce) {
 *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}