/* roulang page: index */
:root {
      --bg-dark: #0F141C;
      --bg-surface: #171E29;
      --bg-card: #1F2735;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --text-light: #E2E8F0;
      --text-dim: #94A3B8;
      --accent: #00D084;
      --accent-hover: #00B371;
      --accent-glow: rgba(0, 208, 132, 0.25);
      --border-dark: #273344;
      --border-light: #E2E8F0;
      --radius: 8px;
      --shadow-sm: 0 2px 8px rgba(15, 20, 28, 0.06);
      --shadow-md: 0 8px 24px rgba(15, 20, 28, 0.08);
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: var(--font-stack);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      width: 100%;
    }

    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.2s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius);
    }

    button, input, select, textarea {
      font-family: inherit;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* Top Bar */
    .topbar {
      background: #090D12;
      color: var(--text-dim);
      font-size: 13px;
      border-bottom: 1px solid #1A2433;
      padding: 8px 0;
    }
    .topbar-content {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }
    .topbar-items {
      display: flex;
      gap: 20px;
      align-items: center;
    }
    .topbar-items span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Sticky Nav */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(15, 20, 28, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-dark);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: #FFFFFF;
      letter-spacing: 0.5px;
    }
    .brand-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--accent), #00A3FF);
      border-radius: 6px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #0F141C;
      font-weight: 900;
      font-size: 16px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      color: var(--text-dim);
      font-size: 15px;
      font-weight: 500;
      padding: 6px 0;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: #FFFFFF;
    }
    .nav-links a:hover::after,
    .nav-links a.active::after {
      content: "";
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 100%;
      height: 2px;
      background: var(--accent);
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      background: var(--accent);
      color: #0F141C;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--accent);
      box-shadow: 0 2px 10px var(--accent-glow);
    }
    .nav-cta:hover {
      background: var(--accent-hover);
      transform: translateY(-1px);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: none;
      color: #FFFFFF;
      font-size: 24px;
      cursor: pointer;
    }

    /* Section Global Styles */
    section {
      padding: 90px 0;
      position: relative;
    }
    .section-title-wrap {
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(0, 208, 132, 0.1);
      border: 1px solid rgba(0, 208, 132, 0.3);
      padding: 4px 10px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 860px;
      line-height: 1.7;
    }

    /* 1. Hero Section (蓝图规范：无大图首屏，图标矩阵 + 状态条 + 短标题) */
    .hero-banner {
      background: radial-gradient(circle at top center, #1B2433 0%, var(--bg-dark) 70%);
      color: #FFFFFF;
      padding: 70px 0 80px;
      border-bottom: 1px solid var(--border-dark);
    }
    .hero-top-status {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.12);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 13px;
      color: var(--text-dim);
      margin-bottom: 24px;
    }
    .status-pulse {
      width: 8px;
      height: 8px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      color: #FFFFFF;
      max-width: 900px;
    }
    .hero-summary {
      font-size: 16px;
      color: var(--text-dim);
      line-height: 1.8;
      max-width: 880px;
      margin-bottom: 36px;
    }
    .hero-action-row {
      display: flex;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .btn-primary {
      background: var(--accent);
      color: #0F141C;
      font-weight: 700;
      font-size: 15px;
      padding: 13px 28px;
      border-radius: var(--radius);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 18px var(--accent-glow);
    }
    .btn-ghost {
      background: transparent;
      color: #FFFFFF;
      font-weight: 600;
      font-size: 15px;
      padding: 13px 26px;
      border-radius: var(--radius);
      border: 1px solid var(--border-dark);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }
    .btn-ghost:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.05);
    }
    .hero-matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .hero-matrix-card {
      background: rgba(23, 30, 41, 0.7);
      border: 1px solid var(--border-dark);
      padding: 20px;
      border-radius: var(--radius);
      transition: all 0.25s ease;
    }
    .hero-matrix-card:hover {
      border-color: var(--accent);
      transform: translateY(-2px);
    }
    .matrix-icon-badge {
      width: 36px;
      height: 36px;
      border-radius: 6px;
      background: rgba(0, 208, 132, 0.12);
      color: var(--accent);
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .matrix-title {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 6px;
    }
    .matrix-desc {
      font-size: 13px;
      color: var(--text-dim);
      line-height: 1.5;
    }

    /* 2. Metrics Section */
    .metrics-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      padding: 28px;
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      border-left: 4px solid var(--accent);
      box-shadow: var(--shadow-sm);
    }
    .metric-num {
      font-size: 40px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.1;
      margin-bottom: 8px;
      font-feature-settings: "tnum";
    }
    .metric-unit {
      font-size: 18px;
      font-weight: 600;
      color: var(--accent);
      margin-left: 4px;
    }
    .metric-label {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .metric-sub {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 3. Safety Claim Section (安全主张与技术底座) */
    .safety-claim-section {
      background: #F1F5F9;
    }
    .dual-split-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .safety-text-panel h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 18px;
      color: var(--text-main);
    }
    .safety-text-panel p {
      font-size: 15px;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 20px;
    }
    .cert-badge-row {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      margin-top: 24px;
    }
    .cert-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 1px solid #CBD5E1;
      padding: 8px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }
    .cert-pill span {
      color: var(--accent);
    }

    /* 4. Inspection Items (检查项与核心优势) */
    .features-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
    }
    .grid-3x2 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .advantage-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.25s ease;
    }
    .advantage-card:hover {
      border-color: #94A3B8;
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .advantage-head {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 16px;
    }
    .advantage-idx {
      font-size: 12px;
      font-weight: 800;
      background: #E2E8F0;
      color: #334155;
      padding: 4px 8px;
      border-radius: 4px;
    }
    .advantage-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
    }
    .advantage-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 5. Product Matrix */
    .products-section {
      background: #F8FAFC;
    }
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-box {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .product-thumb {
      height: 220px;
      background: #0F141C;
      position: relative;
      overflow: hidden;
    }
    .product-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      opacity: 0.92;
      transition: transform 0.4s ease;
    }
    .product-box:hover .product-thumb img {
      transform: scale(1.04);
    }
    .product-badge {
      position: absolute;
      top: 14px;
      left: 14px;
      background: rgba(15, 20, 28, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.2);
      color: var(--accent);
      font-size: 11px;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 4px;
    }
    .product-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .product-name {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .product-param-list {
      list-style: none;
      margin-bottom: 20px;
      font-size: 13px;
      color: #475569;
    }
    .product-param-list li {
      padding: 6px 0;
      border-bottom: 1px dashed #E2E8F0;
      display: flex;
      justify-content: space-between;
    }
    .product-param-list li span:last-child {
      font-weight: 600;
      color: var(--text-main);
    }
    .product-btn {
      margin-top: auto;
      background: #0F141C;
      color: #FFFFFF;
      text-align: center;
      padding: 10px;
      border-radius: 6px;
      font-size: 14px;
      font-weight: 600;
    }
    .product-btn:hover {
      background: #1E293B;
      color: var(--accent);
    }

    /* 6. Service Matrix & Applications */
    .services-section {
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-light);
    }
    .service-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      border: 1px solid var(--border-light);
      padding: 24px;
      border-radius: var(--radius);
      background: #F8FAFC;
    }
    .scene-tag {
      font-size: 12px;
      font-weight: 700;
      color: #0284C7;
      background: #E0F2FE;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .service-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .service-meta {
      font-size: 12px;
      color: #64748B;
      border-top: 1px solid #E2E8F0;
      padding-top: 12px;
    }

    /* 7. Benchmark Table */
    .benchmark-section {
      background: #F8FAFC;
    }
    .table-container {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .bench-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .bench-table th, .bench-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
    }
    .bench-table th {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-main);
    }
    .bench-table tr.highlight-row {
      background: rgba(0, 208, 132, 0.04);
    }
    .bench-table tr.highlight-row td:first-child {
      font-weight: 700;
      color: #0F141C;
    }
    .bench-tag {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 600;
    }
    .tag-superior {
      background: rgba(0, 208, 132, 0.15);
      color: #059669;
    }
    .tag-standard {
      background: #E2E8F0;
      color: #475569;
    }

    /* 8. Dark Case Study */
    .dark-case-section {
      background: var(--bg-dark);
      color: #FFFFFF;
    }
    .dark-case-box {
      border: 1px solid var(--border-dark);
      background: var(--bg-surface);
      border-radius: var(--radius);
      padding: 40px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .case-left h3 {
      font-size: 26px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .case-left p {
      font-size: 15px;
      color: var(--text-dim);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .case-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px solid var(--border-dark);
      padding-top: 20px;
    }
    .case-stat-val {
      font-size: 26px;
      font-weight: 800;
      color: var(--accent);
    }
    .case-stat-desc {
      font-size: 12px;
      color: var(--text-dim);
    }
    .case-right img {
      border: 1px solid var(--border-dark);
      width: 100%;
      height: 320px;
      object-fit: cover;
    }

    /* 9. Timeline */
    .timeline-section {
      background: #FFFFFF;
    }
    .timeline-track {
      position: relative;
      margin-top: 20px;
    }
    .timeline-track::before {
      content: "";
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: #CBD5E1;
      transform: translateX(-50%);
    }
    .timeline-item {
      display: flex;
      margin-bottom: 36px;
      position: relative;
    }
    .timeline-item:nth-child(odd) {
      flex-direction: row-reverse;
    }
    .timeline-content {
      width: 45%;
      background: #F8FAFC;
      border: 1px solid var(--border-light);
      padding: 20px;
      border-radius: var(--radius);
    }
    .timeline-node {
      width: 16px;
      height: 16px;
      background: var(--accent);
      border: 3px solid #FFFFFF;
      border-radius: 50%;
      position: absolute;
      left: 50%;
      top: 20px;
      transform: translateX(-50%);
      box-shadow: 0 0 0 2px var(--border-light);
      z-index: 2;
    }
    .timeline-date {
      font-size: 12px;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 6px;
    }
    .timeline-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .timeline-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 10. Compliance & Boundary Section (边界说明与资质) */
    .boundary-section {
      background: #F1F5F9;
      border-bottom: 1px solid var(--border-light);
    }
    .boundary-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .boundary-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      padding: 24px;
      border-radius: var(--radius);
    }
    .boundary-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: #B45309;
      background: #FEF3C7;
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
    }
    .boundary-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
    }
    .boundary-text {
      font-size: 13px;
      color: #64748B;
      line-height: 1.6;
    }

    /* 11. Customer Stories */
    .stories-section {
      background: #FFFFFF;
    }
    .stories-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .story-card {
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 30px;
      background: #F8FAFC;
    }
    .story-quote {
      font-size: 15px;
      color: #334155;
      line-height: 1.8;
      margin-bottom: 20px;
      position: relative;
    }
    .story-author {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid #E2E8F0;
      padding-top: 16px;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #0F141C;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }
    .author-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .author-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 12. Testimonials */
    .endorse-section {
      background: #F8FAFC;
      border-bottom: 1px solid var(--border-light);
    }
    .endorse-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .endorse-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .endorse-stars {
      color: #F59E0B;
      font-size: 14px;
      margin-bottom: 12px;
      letter-spacing: 2px;
    }
    .endorse-txt {
      font-size: 14px;
      color: #475569;
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .endorse-org {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .verify-badge {
      display: inline-block;
      width: 14px;
      height: 14px;
      background: var(--accent);
      color: #0F141C;
      font-size: 10px;
      line-height: 14px;
      text-align: center;
      border-radius: 50%;
      font-weight: 900;
    }

    /* 13. News Cards */
    .news-section {
      background: #FFFFFF;
    }
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-item {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      transition: all 0.25s ease;
    }
    .news-item:hover {
      border-color: #94A3B8;
      box-shadow: var(--shadow-md);
    }
    .news-img {
      height: 180px;
      overflow: hidden;
      background: #0F141C;
    }
    .news-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .news-item:hover .news-img img {
      transform: scale(1.05);
    }
    .news-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex-grow: 1;
    }
    .news-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }
    .news-title {
      font-size: 16px;
      font-weight: 700;
      line-height: 1.4;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .news-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 14. Deployment Assurance */
    .assurance-section {
      background: #F1F5F9;
      border-bottom: 1px solid var(--border-light);
    }
    .assurance-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .assurance-card {
      background: #FFFFFF;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
    }
    .assurance-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 208, 132, 0.1);
      color: var(--accent);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      font-size: 20px;
      font-weight: 800;
    }
    .assurance-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .assurance-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 15. FAQ Accordion */
    .faq-section {
      background: #FFFFFF;
    }
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      margin-bottom: 14px;
      overflow: hidden;
      background: #FFFFFF;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 20px 24px;
      background: #FFFFFF;
      border: none;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: #F8FAFC;
    }
    .faq-symbol {
      font-size: 18px;
      color: var(--accent);
      transition: transform 0.2s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: #475569;
      line-height: 1.8;
      border-top: 1px solid #F1F5F9;
      background: #F8FAFC;
    }
    .faq-item.active .faq-answer {
      display: block;
      padding-top: 16px;
    }
    .faq-item.active .faq-symbol {
      transform: rotate(45deg);
    }

    /* 16. Conversion Section */
    .contact-section {
      background: var(--bg-dark);
      color: #FFFFFF;
      border-top: 1px solid var(--border-dark);
    }
    .contact-panel {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      background: var(--bg-surface);
      border: 1px solid var(--border-dark);
      padding: 48px;
      border-radius: var(--radius);
    }
    .contact-intro h3 {
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .contact-intro p {
      font-size: 15px;
      color: var(--text-dim);
      line-height: 1.8;
      margin-bottom: 24px;
    }
    .contact-details {
      list-style: none;
      font-size: 14px;
      color: var(--text-dim);
    }
    .contact-details li {
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .contact-details strong {
      color: #FFFFFF;
    }
    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      background: #0D121A;
      border: 1px solid var(--border-dark);
      border-radius: 6px;
      color: #FFFFFF;
      font-size: 14px;
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--accent);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 90px;
    }
    .btn-submit {
      background: var(--accent);
      color: #0F141C;
      font-weight: 700;
      font-size: 15px;
      padding: 14px;
      border: none;
      border-radius: 6px;
      cursor: pointer;
      transition: all 0.2s;
    }
    .btn-submit:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 16px var(--accent-glow);
    }

    /* Footer */
    footer {
      background: #090D12;
      color: var(--text-dim);
      border-top: 1px solid #1A2433;
      padding: 60px 0 24px;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      color: #FFFFFF;
      font-size: 18px;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #64748B;
    }
    .footer-col h5 {
      color: #FFFFFF;
      font-size: 15px;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid #1A2433;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 12px;
      color: #64748B;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .hero-matrix-grid,
      .metrics-grid,
      .service-grid,
      .assurance-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3x2,
      .product-grid,
      .boundary-grid,
      .endorse-grid,
      .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .dual-split-layout,
      .dark-case-box,
      .contact-panel {
        grid-template-columns: 1fr;
      }
      .timeline-track::before {
        left: 20px;
      }
      .timeline-item, .timeline-item:nth-child(odd) {
        flex-direction: row;
      }
      .timeline-content {
        width: 100%;
        margin-left: 48px;
      }
      .timeline-node {
        left: 20px;
      }
    }

    @media (max-width: 768px) {
      .nav-links, .nav-cta {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .hero-matrix-grid,
      .metrics-grid,
      .grid-3x2,
      .product-grid,
      .service-grid,
      .boundary-grid,
      .stories-grid,
      .endorse-grid,
      .news-grid,
      .assurance-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .contact-panel {
        padding: 24px;
      }
      .mobile-nav-panel {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--bg-dark);
        border-bottom: 1px solid var(--border-dark);
        padding: 20px 24px;
      }
      .mobile-nav-panel.open {
        display: block;
      }
      .mobile-nav-panel a {
        display: block;
        padding: 12px 0;
        color: #FFFFFF;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      }
    }