/* roulang page: index */
:root {
      --bg-base: #F8FAFC;
      --bg-surface: #FFFFFF;
      --bg-alt: #F1F5F9;
      --bg-dark: #0B1120;
      --primary: #0F172A;
      --primary-sub: #1E293B;
      --accent-red: #991B1B;
      --accent-gold: #92400E;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border: #E2E8F0;
      --border-dark: #334155;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-card: 0 4px 12px -2px rgba(15, 23, 42, 0.04), 0 2px 4px -2px rgba(15, 23, 42, 0.02);
      --shadow-hover: 0 8px 24px -4px rgba(15, 23, 42, 0.06);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-pill: 9999px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }

    *, *::before, *::after {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: var(--font-stack);
      font-size: 15px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }
    a:hover, a:focus {
      color: var(--accent-red);
    }

    h1, h2, h3, h4, h5, h6 {
      font-family: var(--font-stack);
      color: var(--primary);
      margin-top: 0;
      line-height: 1.35;
    }
    h1 { font-size: 2.25rem; font-weight: 700; letter-spacing: -0.02em; }
    h2 { font-size: 1.75rem; font-weight: 700; margin-bottom: 0.75rem; }
    h3 { font-size: 1.25rem; font-weight: 600; }
    h4 { font-size: 1.05rem; font-weight: 600; }
    p { margin-bottom: 1.25em; color: var(--text-muted); }

    .site-header {
      position: sticky;
      top: 18px;
      z-index: 1000;
      padding: 0 1rem;
    }
    .capsule-nav {
      max-width: 1080px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      padding: 0.5rem 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-badge {
      width: 18px;
      height: 18px;
      background: var(--accent-red);
      border-radius: 3px;
      display: inline-block;
      position: relative;
    }
    .brand-badge::after {
      content: "";
      position: absolute;
      top: 4px;
      left: 4px;
      right: 4px;
      bottom: 4px;
      border: 1.5px solid #fff;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 1.75rem;
    }
    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 0.25rem 0;
    }
    .nav-links li.is-active a,
    .nav-links li a:hover {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-links li.is-active a::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-red);
    }
    .nav-cta-btn {
      padding: 0.45rem 1.15rem;
      background: var(--primary);
      color: #fff !important;
      border-radius: var(--radius-pill);
      font-size: 0.85rem;
      font-weight: 600;
      border: 1px solid var(--primary);
    }
    .nav-cta-btn:hover {
      background: var(--accent-red);
      border-color: var(--accent-red);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      padding: 0.5rem;
      cursor: pointer;
    }

    .section-wrap {
      padding: 5rem 0;
      position: relative;
    }
    .section-wrap.alt {
      background-color: var(--bg-alt);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-wrap.white {
      background-color: var(--bg-surface);
    }
    .section-wrap.dark {
      background-color: var(--bg-dark);
      color: #F8FAFC;
    }
    .section-wrap.dark h2,
    .section-wrap.dark h3,
    .section-wrap.dark h4 {
      color: #FFFFFF;
    }
    .section-wrap.dark p {
      color: #94A3B8;
    }

    .section-head {
      margin-bottom: 3rem;
    }
    .section-head.text-center {
      text-align: center;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent-gold);
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 0.6rem;
      border: 1px solid #FDE68A;
      background: #FEF3C7;
      padding: 0.2rem 0.65rem;
      border-radius: var(--radius-sm);
    }
    .section-tag.dark {
      background: rgba(146, 64, 14, 0.2);
      border-color: rgba(245, 158, 11, 0.3);
      color: #FBBF24;
    }
    .section-head p.lead {
      font-size: 1.05rem;
      line-height: 1.7;
    }

    .status-pulse {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      font-size: 0.78rem;
      color: #047857;
      font-weight: 600;
      background: #ECFDF5;
      padding: 0.2rem 0.65rem;
      border-radius: var(--radius-pill);
      border: 1px solid #A7F3D0;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background-color: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.25);
    }

    .data-pill-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      box-shadow: var(--shadow-card);
      height: 100%;
      border-top: 3px solid var(--primary);
    }
    .data-pill-num {
      font-size: 1.85rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 0.25rem;
      font-feature-settings: "tnum";
    }
    .data-pill-label {
      font-size: 0.8rem;
      color: var(--text-light);
      font-weight: 600;
    }

    .matrix-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem;
      height: 100%;
      position: relative;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: flex;
      flex-direction: column;
    }
    .matrix-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .matrix-code {
      font-family: monospace;
      font-size: 0.75rem;
      color: var(--accent-red);
      background: #FEF2F2;
      padding: 0.2rem 0.5rem;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 1rem;
      border: 1px solid #FEE2E2;
      width: fit-content;
      font-weight: 700;
    }
    .spec-list {
      list-style: none;
      margin: 1.2rem 0 0 0;
      padding: 0;
      font-size: 0.88rem;
      color: var(--text-muted);
      border-top: 1px dashed var(--border);
      padding-top: 1rem;
    }
    .spec-list li {
      margin-bottom: 0.6rem;
      position: relative;
      padding-left: 1.25rem;
    }
    .spec-list li::before {
      content: "—";
      position: absolute;
      left: 0;
      color: var(--accent-gold);
    }

    .audit-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .audit-table th {
      background: var(--primary);
      color: #fff;
      padding: 1rem 1.25rem;
      text-align: left;
      font-weight: 600;
      font-size: 0.9rem;
    }
    .audit-table td {
      padding: 1.1rem 1.25rem;
      border-bottom: 1px solid var(--border);
      font-size: 0.9rem;
    }
    .audit-table tr:last-child td {
      border-bottom: none;
    }
    .audit-table tr:nth-child(even) td {
      background-color: #FAFAFA;
    }
    .val-bottleneck {
      color: #64748B;
      font-weight: 400;
    }
    .val-optimal {
      color: var(--accent-red);
      font-weight: 600;
    }

    .timeline-node {
      position: relative;
      padding-left: 2rem;
      border-left: 2px solid var(--border);
      margin-bottom: 2rem;
    }
    .timeline-node::before {
      content: "";
      position: absolute;
      left: -9px;
      top: 0;
      width: 16px;
      height: 16px;
      border-radius: 50%;
      background: var(--bg-surface);
      border: 3px solid var(--accent-red);
    }
    .timeline-year {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent-gold);
      margin-bottom: 0.2rem;
      display: inline-block;
    }

    .focus-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2.25rem;
      height: 100%;
      box-shadow: var(--shadow-card);
    }
    .article-strip {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.25rem 1.5rem;
      margin-bottom: 1rem;
      transition: border-color 0.2s;
    }
    .article-strip:hover {
      border-color: var(--accent-red);
    }
    .article-meta {
      font-size: 0.78rem;
      color: var(--text-light);
      margin-bottom: 0.4rem;
    }

    .defense-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.5rem;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .seal-mark {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      border: 2px solid var(--accent-gold);
      color: var(--accent-gold);
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 1rem;
      font-weight: 700;
      font-size: 0.75rem;
      background: #FFFBEB;
    }

    .terminal-box {
      background: #000000;
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 1.25rem;
      font-family: monospace;
      font-size: 0.85rem;
      color: #38BDF8;
      height: 240px;
      overflow-y: auto;
    }
    .terminal-line {
      margin-bottom: 0.4rem;
      white-space: nowrap;
    }
    .terminal-time {
      color: #64748B;
      margin-right: 0.5rem;
    }

    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2rem;
      position: relative;
      box-shadow: var(--shadow-card);
    }
    .stamp-approved {
      position: absolute;
      top: 1.5rem;
      right: 1.5rem;
      border: 2px solid var(--accent-red);
      color: var(--accent-red);
      padding: 0.25rem 0.65rem;
      font-size: 0.75rem;
      font-weight: 700;
      transform: rotate(5deg);
      border-radius: var(--radius-sm);
      opacity: 0.85;
    }

    .accordion-item-wrap {
      border: 1px solid var(--border);
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      margin-bottom: 0.85rem;
      overflow: hidden;
    }
    .accordion-btn {
      width: 100%;
      padding: 1.25rem 1.5rem;
      text-align: left;
      font-weight: 600;
      font-size: 1rem;
      color: var(--primary);
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .accordion-content {
      padding: 0 1.5rem 1.25rem;
      font-size: 0.92rem;
      color: var(--text-muted);
      border-top: 1px solid #F1F5F9;
      padding-top: 1rem;
    }

    .contract-form-wrap {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      overflow: hidden;
    }
    .form-pane-left {
      background: #0F172A;
      color: #fff;
      padding: 3rem 2.5rem;
    }
    .form-pane-left p {
      color: #94A3B8;
    }
    .form-pane-right {
      padding: 3rem 2.5rem;
    }
    .form-control {
      width: 100%;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 0.75rem 1rem;
      font-size: 0.92rem;
      margin-bottom: 1.25rem;
      outline: none;
      background: #FAFAFA;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #fff;
    }
    .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #fff;
      border: none;
      padding: 0.9rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s;
    }
    .btn-submit:hover {
      background: var(--accent-red);
    }

    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 4rem 0 2rem;
      border-top: 1px solid #1E293B;
      font-size: 0.88rem;
    }
    .site-footer h4 {
      color: #FFFFFF;
      font-size: 0.98rem;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a {
      color: #94A3B8;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .copyright-strip {
      margin-top: 3rem;
      padding-top: 1.5rem;
      border-top: 1px solid #1E293B;
      font-size: 0.8rem;
      color: #64748B;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
    }

    @media screen and (max-width: 768px) {
      .capsule-nav {
        border-radius: var(--radius-md);
        padding: 0.75rem 1rem;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .section-wrap {
        padding: 3rem 0;
      }
      h1 { font-size: 1.85rem; }
      h2 { font-size: 1.45rem; }
      .form-pane-left, .form-pane-right {
        padding: 2rem 1.5rem;
      }
    }

/* roulang page: category1 */
:root {
      --bg-base: #F8FAFC;
      --bg-surface: #FFFFFF;
      --bg-alt: #F1F5F9;
      --bg-dark: #0B1120;
      --primary: #0F172A;
      --primary-sub: #1E293B;
      --accent-red: #991B1B;
      --accent-gold: #92400E;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border: #E2E8F0;
      --border-dark: #334155;
      --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
      --shadow-card: 0 4px 12px -2px rgba(15, 23, 42, 0.04), 0 2px 4px -2px rgba(15, 23, 42, 0.02);
      --shadow-hover: 0 8px 24px -4px rgba(15, 23, 42, 0.06);
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-pill: 9999px;
      --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: var(--font-stack);
      font-size: 15px;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }
    a:hover, a:focus {
      color: var(--accent-red);
    }
    .site-header {
      position: sticky;
      top: 18px;
      z-index: 1000;
      padding: 0 1rem;
    }
    .capsule-nav {
      max-width: 1080px;
      margin: 0 auto;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      padding: 0.5rem 1.5rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-badge {
      width: 18px;
      height: 18px;
      background: var(--accent-red);
      border-radius: 3px;
      display: inline-block;
      position: relative;
    }
    .brand-badge::after {
      content: "";
      position: absolute;
      top: 4px;
      left: 4px;
      right: 4px;
      bottom: 4px;
      border: 1.5px solid #fff;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 1.75rem;
    }
    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      position: relative;
      padding: 0.25rem 0;
    }
    .nav-links li.is-active a,
    .nav-links li a:hover {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-links li.is-active a::after {
      content: "";
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent-red);
    }
    .nav-cta-btn {
      padding: 0.45rem 1.15rem;
      background: var(--primary);
      color: #fff !important;
      border-radius: var(--radius-pill);
      font-size: 0.85rem;
      font-weight: 600;
      border: 1px solid var(--primary);
      display: inline-block;
    }
    .nav-cta-btn:hover {
      background: var(--accent-red);
      border-color: var(--accent-red);
    }
    .section-wrap {
      padding: 4.5rem 0;
      position: relative;
    }
    .section-wrap.alt {
      background-color: var(--bg-alt);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }
    .section-wrap.white {
      background-color: var(--bg-surface);
    }
    .cat-head-box {
      padding-top: 2rem;
      padding-bottom: 1.5rem;
      border-bottom: 1px solid var(--border);
      background: var(--bg-surface);
    }
    .breadcrumbs-bar {
      font-size: 0.82rem;
      color: var(--text-light);
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .breadcrumbs-bar a {
      color: var(--text-muted);
    }
    .breadcrumbs-bar a:hover {
      color: var(--accent-red);
    }
    .cat-title-wrap {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-end;
      justify-content: space-between;
      gap: 1.5rem;
    }
    .cat-h1 {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.25;
      margin: 0;
      letter-spacing: -0.01em;
    }
    .cat-meta-tags {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      flex-wrap: wrap;
    }
    .meta-tag-pill {
      font-size: 0.78rem;
      font-weight: 600;
      padding: 0.25rem 0.65rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: var(--bg-alt);
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    .meta-tag-pill.badge-gold {
      background: #FEF3C7;
      border-color: #FDE68A;
      color: var(--accent-gold);
    }
    .meta-tag-pill.badge-live {
      background: #DCFCE7;
      border-color: #BBF7D0;
      color: #166534;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: #10B981;
      display: inline-block;
    }
    .cat-lead {
      margin-top: 1rem;
      font-size: 0.98rem;
      color: var(--text-muted);
      max-width: 920px;
      line-height: 1.7;
    }
    .cat-filter-section {
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border);
      position: sticky;
      top: 76px;
      z-index: 900;
      box-shadow: 0 4px 12px -4px rgba(15, 23, 42, 0.03);
    }
    .filter-toolbar {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      padding: 0.85rem 0;
      gap: 1rem;
      font-size: 0.85rem;
    }
    .filter-group {
      display: flex;
      align-items: center;
      gap: 0.4rem;
      flex-wrap: wrap;
    }
    .filter-label {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--text-light);
      margin-right: 0.3rem;
    }
    .filter-btn {
      padding: 0.25rem 0.75rem;
      border-radius: var(--radius-pill);
      border: 1px solid var(--border);
      background: #fff;
      color: var(--text-muted);
      cursor: pointer;
      font-size: 0.82rem;
      font-weight: 500;
      transition: all 0.15s ease;
    }
    .filter-btn:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .filter-btn.is-active {
      background: var(--primary);
      border-color: var(--primary);
      color: #FFFFFF;
      font-weight: 600;
    }
    .archive-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-card);
      margin-bottom: 1.5rem;
      padding: 1.75rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: calc(100% - 1.5rem);
      transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
      position: relative;
    }
    .archive-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }
    .archive-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 0.85rem;
    }
    .archive-code {
      font-family: monospace;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--accent-red);
      background: #FEE2E2;
      padding: 0.15rem 0.5rem;
      border-radius: var(--radius-sm);
    }
    .archive-time {
      font-size: 0.78rem;
      color: var(--text-light);
    }
    .archive-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.4;
      margin: 0 0 0.75rem 0;
    }
    .archive-abstract {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 1.25rem;
    }
    .archive-tags {
      display: flex;
      gap: 0.4rem;
      flex-wrap: wrap;
      margin-bottom: 1.25rem;
    }
    .tag-item {
      font-size: 0.75rem;
      padding: 0.1rem 0.5rem;
      border-radius: var(--radius-sm);
      background: var(--bg-alt);
      color: var(--text-muted);
      border: 1px solid var(--border);
    }
    .archive-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px solid var(--border);
      padding-top: 1rem;
      font-size: 0.84rem;
    }
    .archive-link {
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
    }
    .archive-link:hover {
      color: var(--accent-red);
    }
    .pagination-bar {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 0.4rem;
      margin-top: 2rem;
    }
    .page-btn {
      width: 36px;
      height: 36px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      background: #fff;
    }
    .page-btn.is-current {
      background: var(--primary);
      border-color: var(--primary);
      color: #fff;
    }
    .page-btn:hover:not(.is-current) {
      border-color: var(--text-muted);
      color: var(--primary);
    }
    .page-btn.wide {
      width: auto;
      padding: 0 1rem;
    }
    .guideline-panel {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 2.25rem;
      box-shadow: var(--shadow-card);
    }
    .guideline-item {
      margin-bottom: 1.5rem;
      padding-bottom: 1.5rem;
      border-bottom: 1px dashed var(--border);
    }
    .guideline-item:last-child {
      margin-bottom: 0;
      padding-bottom: 0;
      border-bottom: none;
    }
    .guideline-badge {
      font-size: 0.76rem;
      font-weight: 700;
      color: var(--accent-gold);
      margin-bottom: 0.4rem;
      display: inline-block;
    }
    .guideline-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.5rem;
    }
    .spec-table-box {
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #fff;
    }
    .spec-table {
      width: 100%;
      margin: 0;
      border-collapse: collapse;
      font-size: 0.84rem;
    }
    .spec-table th {
      background: var(--bg-alt);
      color: var(--primary);
      font-weight: 600;
      padding: 0.75rem 1rem;
      text-align: left;
      border-bottom: 1px solid var(--border);
    }
    .spec-table td {
      padding: 0.75rem 1rem;
      border-bottom: 1px solid var(--border);
      color: var(--text-muted);
    }
    .spec-table tr:last-child td {
      border-bottom: none;
    }
    .qa-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      height: 100%;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .qa-q {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.75rem;
      display: flex;
      gap: 0.6rem;
      line-height: 1.4;
    }
    .qa-tag-q {
      color: var(--accent-red);
      font-weight: 800;
    }
    .qa-a {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .topics-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      margin-top: 1.5rem;
    }
    .topic-pill {
      display: inline-flex;
      align-items: center;
      padding: 0.45rem 1rem;
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      font-size: 0.86rem;
      color: var(--text-main);
      font-weight: 500;
      box-shadow: var(--shadow-sm);
    }
    .topic-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }
    .site-footer {
      background: var(--bg-dark);
      color: #94A3B8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid var(--border-dark);
      font-size: 0.9rem;
    }
    .site-footer h4 {
      color: #FFFFFF;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a {
      color: #94A3B8;
      font-size: 0.85rem;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .copyright-strip {
      border-top: 1px solid var(--border-dark);
      margin-top: 3.5rem;
      padding-top: 1.75rem;
      font-size: 0.8rem;
      color: #64748B;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 1rem;
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .filter-toolbar {
        flex-direction: column;
        align-items: flex-start;
      }
      .cat-h1 {
        font-size: 1.6rem;
      }
      .section-wrap {
        padding: 3rem 0;
      }
    }