/* roulang page: index */
:root {
      --bg: #f6f8f7;
      --surface: #ffffff;
      --surface-soft: #f2f6f4;
      --line: #dce5df;
      --text: #13211b;
      --muted: #5b6d63;
      --brand: #1f9d61;
      --brand-dark: #15784a;
      --brand-soft: #e8f7ef;
      --success: #1f9d61;
      --shadow: 0 10px 30px rgba(15, 23, 42, .06);
      --shadow-sm: 0 6px 18px rgba(15, 23, 42, .05);
      --radius: 8px;
    }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background:
        linear-gradient(180deg, #fbfcfb 0%, #f5f8f6 36%, #f4f7f5 100%);
      color: var(--text);
      font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.6;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button, input, textarea, select {
      font: inherit;
    }
    .container {
      width: min(1180px, calc(100% - 32px));
      margin: 0 auto;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: blur(8px);
      background: rgba(255, 255, 255, .9);
      border-bottom: 1px solid rgba(220, 229, 223, .9);
    }
    .nav-link {
      position: relative;
      transition: color .18s ease, background-color .18s ease, border-color .18s ease;
    }
    .nav-link:hover,
    .nav-link:focus-visible {
      color: var(--brand-dark);
      background: var(--brand-soft);
      outline: none;
    }
    .nav-link.active {
      color: var(--brand-dark);
      background: var(--brand-soft);
      border-color: rgba(31, 157, 97, .28);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: .5rem;
      min-height: 46px;
      padding: 0 16px;
      border-radius: var(--radius);
      border: 1px solid transparent;
      font-weight: 700;
      transition: transform .18s ease, background-color .18s ease, color .18s ease, border-color .18s ease, box-shadow .18s ease;
      white-space: nowrap;
      cursor: pointer;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn:focus-visible {
      outline: 2px solid rgba(31, 157, 97, .28);
      outline-offset: 2px;
    }
    .btn-primary {
      background: var(--brand);
      color: #fff;
      box-shadow: var(--shadow-sm);
    }
    .btn-primary:hover { background: var(--brand-dark); }
    .btn-secondary {
      background: #fff;
      color: var(--text);
      border-color: var(--line);
    }
    .btn-secondary:hover {
      border-color: rgba(31, 157, 97, .35);
      background: #f8fbf9;
      color: var(--brand-dark);
    }
    .btn-ghost {
      background: transparent;
      color: var(--text);
      border-color: var(--line);
    }
    .btn-ghost:hover {
      border-color: rgba(31, 157, 97, .25);
      background: var(--brand-soft);
      color: var(--brand-dark);
    }
    .section {
      padding: 72px 0;
    }
    .section-tight {
      padding: 56px 0;
    }
    .section-title {
      font-size: clamp(1.35rem, 1.15rem + .7vw, 2rem);
      line-height: 1.16;
      letter-spacing: 0;
      margin: 0;
      color: var(--text);
    }
    .section-copy {
      margin-top: 12px;
      color: var(--muted);
      max-width: 68ch;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: .45rem;
      padding: 6px 10px;
      border-radius: 999px;
      background: var(--brand-soft);
      color: var(--brand-dark);
      font-size: .85rem;
      font-weight: 700;
    }
    .card {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .card-hover {
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
    }
    .card-hover:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow);
      border-color: rgba(31, 157, 97, .22);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: .35rem;
      padding: .34rem .65rem;
      border-radius: 999px;
      background: var(--brand-soft);
      color: var(--brand-dark);
      font-size: .78rem;
      font-weight: 700;
    }
    .badge-muted {
      background: #eef2f0;
      color: #42524a;
    }
    .metric {
      padding: 18px;
      border-radius: var(--radius);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-sm);
    }
    .metric-value {
      font-size: 1.55rem;
      line-height: 1.1;
      font-weight: 800;
      color: var(--text);
      font-variant-numeric: tabular-nums;
    }
    .metric-label {
      margin-top: 6px;
      color: var(--muted);
      font-size: .92rem;
    }
    .stage {
      position: relative;
      overflow: hidden;
      border-radius: calc(var(--radius) + 2px);
      border: 1px solid var(--line);
      background:
        linear-gradient(180deg, rgba(255,255,255,.96), rgba(247,250,248,.98));
      box-shadow: var(--shadow);
    }
    .stage::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, transparent 0, rgba(31,157,97,.06) 50%, transparent 100%);
      pointer-events: none;
    }
    .stage-grid {
      background-image:
        linear-gradient(rgba(31, 157, 97, .06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(31, 157, 97, .06) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .field {
      width: 100%;
      min-height: 46px;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: #fff;
      padding: 0 14px;
      color: var(--text);
      transition: border-color .18s ease, box-shadow .18s ease;
    }
    .field:focus {
      border-color: rgba(31, 157, 97, .4);
      box-shadow: 0 0 0 3px rgba(31, 157, 97, .12);
      outline: none;
    }
    .field::placeholder { color: #93a29a; }
    details.faq-item {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }
    details.faq-item[open] {
      border-color: rgba(31, 157, 97, .25);
    }
    details.faq-item summary {
      list-style: none;
      cursor: pointer;
      padding: 18px 18px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-weight: 700;
      color: var(--text);
    }
    details.faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-answer {
      padding: 0 18px 18px;
      color: var(--muted);
    }
    .divider {
      border-top: 1px solid var(--line);
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--success);
      box-shadow: 0 0 0 4px rgba(31, 157, 97, .12);
    }
    .mobile-panel {
      max-height: 0;
      overflow: hidden;
      transition: max-height .22s ease;
    }
    .mobile-panel.open {
      max-height: 360px;
    }
    .stacked-card {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }
    .info-row {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }
    .info-dot {
      flex: 0 0 auto;
      margin-top: 6px;
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--brand);
    }
    .quote {
      color: var(--muted);
      position: relative;
      padding-left: 14px;
    }
    .quote::before {
      content: "";
      position: absolute;
      left: 0;
      top: .35rem;
      width: 3px;
      height: calc(100% - .5rem);
      border-radius: 999px;
      background: var(--brand);
    }
    .soft-band {
      background: linear-gradient(180deg, #f8fbf9 0%, #eef5f1 100%);
      border-top: 1px solid rgba(220, 229, 223, .9);
      border-bottom: 1px solid rgba(220, 229, 223, .9);
    }
    .menu-button {
      border: 1px solid var(--line);
      background: #fff;
      border-radius: var(--radius);
      min-height: 44px;
      min-width: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: background-color .18s ease, border-color .18s ease, transform .18s ease;
    }
    .menu-button:hover {
      border-color: rgba(31, 157, 97, .28);
      background: var(--brand-soft);
      transform: translateY(-1px);
    }
    .timeline {
      display: grid;
      gap: 14px;
    }
    .timeline-item {
      display: grid;
      grid-template-columns: 92px 1fr;
      gap: 16px;
      align-items: start;
      padding: 14px 0;
      border-bottom: 1px solid var(--line);
    }
    .timeline-item:last-child { border-bottom: 0; padding-bottom: 0; }
    .timeline-year {
      font-weight: 800;
      color: var(--brand-dark);
    }
    .timeline-copy {
      color: var(--muted);
    }
    .list-clean {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .list-clean li + li { margin-top: 12px; }
    .mini-table {
      width: 100%;
      border-collapse: collapse;
      overflow: hidden;
      border-radius: var(--radius);
    }
    .mini-table th,
    .mini-table td {
      border: 1px solid var(--line);
      padding: 12px 14px;
      text-align: left;
      vertical-align: top;
      background: #fff;
    }
    .mini-table th {
      background: #f7faf8;
      color: var(--text);
      font-weight: 700;
    }
    .mini-table td {
      color: var(--muted);
    }
    @media (max-width: 1024px) {
      .section { padding: 64px 0; }
      .section-tight { padding: 48px 0; }
    }
    @media (max-width: 768px) {
      .section { padding: 54px 0; }
      .section-tight { padding: 40px 0; }
      .timeline-item {
        grid-template-columns: 1fr;
        gap: 8px;
      }
    }

/* roulang page: category1 */
:root {
      --brand: #0f8a43;
      --brand-dark: #0c6f37;
      --brand-soft: #ecfdf3;
      --ink: #0f172a;
      --muted: #64748b;
      --line: #dbe3ea;
      --bg: #f8fafc;
      --surface: #ffffff;
      --shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
      --radius: 8px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      background: var(--bg);
      color: var(--ink);
      letter-spacing: 0;
      line-height: 1.6;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .18s ease, background-color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease;
    }

    img {
      max-width: 100%;
      display: block;
    }

    button,
    input,
    select,
    textarea {
      font: inherit;
      letter-spacing: 0;
    }

    ::selection {
      background: #d5f7e2;
      color: #0f172a;
    }

    .container {
      width: min(1160px, calc(100% - 1.5rem));
      margin: 0 auto;
    }

    .panel {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .nav-link {
      border: 1px solid transparent;
      color: #334155;
    }

    .nav-link:hover,
    .nav-link.active {
      background: var(--brand-soft);
      color: var(--brand-dark);
      border-color: #bbebcc;
    }

    .btn-primary {
      background: var(--brand);
      color: #fff;
      border: 1px solid var(--brand);
      box-shadow: 0 8px 18px rgba(15, 138, 67, .16);
    }

    .btn-primary:hover {
      background: var(--brand-dark);
      border-color: var(--brand-dark);
      transform: translateY(-1px);
      box-shadow: 0 12px 24px rgba(15, 138, 67, .2);
    }

    .btn-secondary {
      background: #fff;
      color: #0f172a;
      border: 1px solid var(--line);
    }

    .btn-secondary:hover {
      background: #f8fafc;
      border-color: #cbd5e1;
      transform: translateY(-1px);
    }

    .chip {
      border: 1px solid var(--line);
      background: #fff;
      color: #334155;
    }

    .chip:hover {
      border-color: #bfe8cd;
      background: var(--brand-soft);
      color: var(--brand-dark);
    }

    .chip.is-active {
      border-color: #a8e2be;
      background: #e8fbef;
      color: var(--brand-dark);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: .35rem;
      padding: .3rem .55rem;
      border-radius: 999px;
      font-size: .75rem;
      font-weight: 700;
      line-height: 1;
      border: 1px solid transparent;
    }

    .badge-green {
      background: #e8fbef;
      color: #0c6f37;
      border-color: #bfe8cd;
    }

    .badge-slate {
      background: #f1f5f9;
      color: #334155;
      border-color: #e2e8f0;
    }

    .badge-amber {
      background: #fff7e6;
      color: #92400e;
      border-color: #fde3a3;
    }

    .field,
    .select,
    .textarea {
      width: 100%;
      border: 1px solid var(--line);
      background: #fff;
      color: #0f172a;
      border-radius: var(--radius);
      padding: .8rem .9rem;
      transition: border-color .18s ease, box-shadow .18s ease, background-color .18s ease;
      outline: none;
    }

    .field:focus,
    .select:focus,
    .textarea:focus {
      border-color: #8fd4a8;
      box-shadow: 0 0 0 4px rgba(20, 164, 77, .10);
    }

    .muted {
      color: var(--muted);
    }

    .hero-surface {
      background:
        linear-gradient(180deg, #ffffff 0%, #fbfdfc 100%);
      border: 1px solid var(--line);
      border-radius: 8px;
      box-shadow: var(--shadow);
    }

    .metric {
      border: 1px solid var(--line);
      background: #fff;
      border-radius: 8px;
    }

    .stage {
      background: #ffffff;
      border: 1px solid var(--line);
      border-radius: 8px;
      box-shadow: var(--shadow);
    }

    .grid-line {
      background-image: linear-gradient(to right, rgba(148, 163, 184, .10) 1px, transparent 1px), linear-gradient(to bottom, rgba(148, 163, 184, .10) 1px, transparent 1px);
      background-size: 18px 18px;
    }

    .stat-bar {
      height: .55rem;
      border-radius: 999px;
      background: #e5e7eb;
      overflow: hidden;
    }

    .stat-bar > span {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, #22c55e, #0f8a43);
    }

    details.faq-item {
      border: 1px solid var(--line);
      border-radius: 8px;
      background: #fff;
      overflow: hidden;
    }

    details.faq-item[open] {
      border-color: #bfe8cd;
      box-shadow: 0 10px 20px rgba(15, 138, 67, .08);
    }

    details.faq-item summary {
      list-style: none;
      cursor: pointer;
      padding: 1rem 1.05rem;
      font-weight: 700;
      color: #0f172a;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
    }

    details.faq-item summary::-webkit-details-marker {
      display: none;
    }

    details.faq-item .faq-body {
      padding: 0 1.05rem 1rem 1.05rem;
      color: #475569;
      font-size: .95rem;
    }

    .focus-ring:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: 2px;
    }

    @media (max-width: 767px) {
      .container {
        width: min(100% - 1rem, 1160px);
      }
    }