/* roulang page: index */
:root {
      --primary: #00B894;
      --primary-dark: #0A3622;
      --primary-hover: #009a7b;
      --secondary: #FFB300;
      --dark-slate: #0F172A;
      --card-bg: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --bg-light: #F8FAFC;
      --bg-gray: #F1F5F9;
      --border-color: #E2E8F0;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(0, 184, 148, 0.15);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --font-mono: "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      line-height: 1.6;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 15px;
      padding: 12px 28px;
      border-radius: 9999px;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn:active {
      transform: scale(0.98);
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(0, 184, 148, 0.35);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(0, 184, 148, 0.45);
    }
    .btn-secondary {
      background-color: var(--secondary);
      color: #0F172A;
      box-shadow: 0 4px 14px rgba(255, 179, 0, 0.3);
    }
    .btn-secondary:hover {
      background-color: #f0a500;
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline-white {
      border-color: rgba(255, 255, 255, 0.3);
      color: #FFFFFF;
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(4px);
    }
    .btn-outline-white:hover {
      border-color: #FFFFFF;
      background: rgba(255, 255, 255, 0.2);
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.3px;
    }
    .badge-primary {
      background-color: rgba(0, 184, 148, 0.12);
      color: var(--primary);
      border: 1px solid rgba(0, 184, 148, 0.2);
    }
    .badge-warning {
      background-color: rgba(255, 179, 0, 0.15);
      color: #B45309;
      border: 1px solid rgba(255, 179, 0, 0.3);
    }
    .badge-dark {
      background-color: rgba(255, 255, 255, 0.15);
      color: #FFFFFF;
      border: 1px solid rgba(255, 255, 255, 0.25);
    }
    .section-padding {
      padding-top: 96px;
      padding-bottom: 96px;
    }
    .section-header {
      margin-bottom: 56px;
      text-align: center;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .section-header h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-top: 12px;
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .section-header p {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .font-num {
      font-family: var(--font-mono);
      font-weight: 700;
    }

    /* Top bar */
    .topbar {
      height: 38px;
      background-color: var(--dark-slate);
      color: #94A3B8;
      font-size: 12px;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .topbar .container {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .topbar-items {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .topbar-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* Header Nav */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      height: 72px;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), #009a7b);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 18px;
      box-shadow: 0 4px 10px rgba(0, 184, 148, 0.3);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-links a {
      font-size: 15px;
      font-weight: 600;
      color: #334155;
    }
    .nav-links a:hover {
      color: var(--primary);
    }
    .nav-action {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 22px;
      color: var(--text-main);
      cursor: pointer;
      padding: 8px;
    }

    /* Mobile Drawer */
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 72px;
      left: 0;
      right: 0;
      background: #FFFFFF;
      padding: 24px;
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      z-index: 999;
    }
    .mobile-drawer.open {
      display: block;
    }
    .mobile-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-bottom: 20px;
    }
    .mobile-links a {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: block;
      padding: 8px 0;
    }

    /* Hero Section (Blueprint: Assessment Survey Look) */
    .hero-section {
      background: linear-gradient(180deg, #F8FAFC 0%, #EDF2F7 100%);
      padding: 72px 0 88px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content h1 {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--primary-dark);
      letter-spacing: -0.8px;
      margin-bottom: 20px;
    }
    .hero-desc {
      font-size: 16px;
      color: #475569;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 32px;
    }
    .hero-stat-pills {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
      margin-top: 24px;
    }
    .stat-pill {
      background: #FFFFFF;
      padding: 14px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .stat-pill .val {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary-dark);
    }
    .stat-pill .lbl {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 2px;
    }

    /* Hero Survey Panel (Blueprint element) */
    .hero-survey-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid #CBD5E1;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .survey-header {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 18px;
      margin-bottom: 20px;
    }
    .survey-step-num {
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .survey-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-top: 4px;
    }
    .survey-options {
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 24px;
    }
    .survey-opt {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      background: var(--bg-light);
      cursor: pointer;
      transition: all 0.2s ease;
      font-size: 14px;
      font-weight: 500;
    }
    .survey-opt:hover, .survey-opt.active {
      border-color: var(--primary);
      background: rgba(0, 184, 148, 0.05);
      color: var(--primary-dark);
    }
    .survey-opt i {
      color: var(--primary);
    }
    .survey-result-preview {
      background: #F8FAFC;
      border: 1px dashed #CBD5E1;
      border-radius: var(--radius-md);
      padding: 16px;
      margin-bottom: 20px;
    }
    .preview-tag {
      font-size: 11px;
      font-weight: 700;
      color: #64748B;
      margin-bottom: 6px;
      text-transform: uppercase;
    }
    .preview-val {
      font-size: 14px;
      color: var(--text-main);
      font-weight: 600;
    }

    /* Section 2: Technical Directory / Catalog */
    .bg-white { background-color: #FFFFFF; }
    .bg-slate { background-color: var(--bg-gray); }
    .bg-dark { background-color: var(--dark-slate); color: #F8FAFC; }
    
    .catalog-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .catalog-item {
      background: var(--bg-light);
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .catalog-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .catalog-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(0, 184, 148, 0.1);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }
    .catalog-item h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .catalog-item p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 3: Value Points (6 cards grid) */
    .value-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .value-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .value-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
      box-shadow: 0 12px 28px rgba(0,0,0,0.06);
    }
    .value-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .value-card:hover::before {
      opacity: 1;
    }
    .value-card-icon {
      font-size: 24px;
      color: var(--primary);
      margin-bottom: 14px;
    }
    .value-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .value-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Section 4: Key Diagram / Hardware & Software Topology */
    .topology-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .topology-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .topology-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--primary-dark);
    }
    .topology-card p {
      font-size: 14.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .spec-table-row {
      display: flex;
      justify-content: space-between;
      padding: 10px 0;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .spec-table-row:last-child {
      border-bottom: none;
    }
    .spec-table-row .k {
      color: var(--text-muted);
    }
    .spec-table-row .v {
      font-weight: 600;
      color: var(--text-main);
    }

    /* Section 5: Pain Points List (Numbered) */
    .pain-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .pain-card {
      background: #FFF7ED;
      border: 1px solid #FFEDD5;
      padding: 24px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .pain-card .idx {
      font-size: 28px;
      font-family: var(--font-mono);
      font-weight: 800;
      color: #EA580C;
      opacity: 0.35;
      position: absolute;
      top: 16px;
      right: 18px;
    }
    .pain-card h3 {
      font-size: 16.5px;
      font-weight: 700;
      color: #9A3412;
      margin-bottom: 10px;
    }
    .pain-card p {
      font-size: 13.5px;
      color: #7C2D12;
      line-height: 1.6;
    }

    /* Section 6: Flagship Products Showcase (3 cards) */
    .product-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .product-card {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .product-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .product-img-wrap {
      height: 220px;
      background: #F1F5F9;
      position: relative;
      overflow: hidden;
    }
    .product-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .product-card:hover .product-img-wrap img {
      transform: scale(1.04);
    }
    .product-badge-float {
      position: absolute;
      top: 14px;
      left: 14px;
      z-index: 2;
    }
    .product-body {
      padding: 26px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .product-title {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .product-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      flex: 1;
    }
    .product-specs-list {
      background: var(--bg-light);
      padding: 14px;
      border-radius: var(--radius-sm);
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 13px;
    }

    /* Section 7: Station Deployment Steps (Step 1 to Step 4) */
    .steps-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-card {
      background: #FFFFFF;
      padding: 26px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-dark);
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 16px;
    }
    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .step-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 8: Dark Mode Optical Storage & Charging */
    .dark-section {
      background-color: var(--dark-slate);
      color: #F8FAFC;
    }
    .dark-section h2 {
      color: #FFFFFF;
    }
    .dark-section p.subtitle {
      color: #94A3B8;
    }
    .dark-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .dark-card-panel {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 32px;
      backdrop-filter: blur(8px);
    }
    .dark-metrics-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 24px;
    }
    .dark-metric-box {
      background: rgba(0, 184, 148, 0.1);
      border: 1px solid rgba(0, 184, 148, 0.25);
      border-radius: var(--radius-md);
      padding: 18px;
    }
    .dark-metric-box .val {
      font-size: 26px;
      color: var(--primary);
    }
    .dark-metric-box .lbl {
      font-size: 13px;
      color: #CBD5E1;
      margin-top: 4px;
    }

    /* Section 9: Deployment Scenario Matrix */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .scenario-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .scenario-img-box {
      height: 160px;
      overflow: hidden;
    }
    .scenario-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .scenario-content {
      padding: 20px;
    }
    .scenario-content h3 {
      font-size: 16.5px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .scenario-content p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Section 10: Benchmark Narrative Case */
    .narrative-box {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 36px;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
gap: 36px;
      align-items: center;
      box-shadow: var(--shadow-sm);
    }
    .narrative-img {
      height: 280px;
      border-radius: var(--radius-md);
      overflow: hidden;
    }
    .narrative-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .narrative-text h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }
    .narrative-quote {
      font-size: 14.5px;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 20px;
      border-left: 3px solid var(--primary);
      padding-left: 16px;
      font-style: italic;
    }
    .operator-profile {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .operator-meta .name {
      font-weight: 700;
      font-size: 15px;
      color: var(--text-main);
    }
    .operator-meta .role {
      font-size: 12.5px;
      color: var(--text-muted);
    }

    /* Section 11: Data Counters Strip */
    .data-strip-section {
      background: linear-gradient(135deg, var(--primary-dark) 0%, #0c432b 100%);
      color: #FFFFFF;
      padding: 64px 0;
    }
    .data-counter-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .counter-item {
      padding: 12px;
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }
    .counter-item:last-child {
      border-right: none;
    }
    .counter-item .number {
      font-size: 38px;
      font-weight: 800;
      color: #55EFC4;
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .counter-item .title {
      font-size: 15px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 4px;
    }
    .counter-item .desc {
      font-size: 12.5px;
      color: #A7F3D0;
    }

    /* Section 12: Client Testimonials */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testi-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testi-stars {
      color: var(--secondary);
      font-size: 14px;
      margin-bottom: 14px;
      display: flex;
      gap: 3px;
    }
    .testi-text {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .testi-author {
      font-size: 13.5px;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-company {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Section 13: Technical Insights & News */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .news-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      transition: all 0.3s ease;
    }
    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .news-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
      font-size: 12.5px;
      color: var(--text-muted);
    }
    .news-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.45;
    }
    .news-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex: 1;
    }
    .news-anchor-link {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    /* Section 14: Technical FAQ */
    .faq-wrapper {
      max-width: 840px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-summary {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 16px;
      color: var(--text-main);
      list-style: none;
      user-select: none;
    }
    .faq-summary::-webkit-details-marker {
      display: none;
    }
    .faq-summary i {
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }
    details[open] .faq-summary i {
      transform: rotate(180deg);
      color: var(--primary);
    }
    .faq-body {
      padding: 0 24px 22px;
      font-size: 14.5px;
      color: #475569;
      line-height: 1.75;
      border-top: 1px solid transparent;
    }

    /* Section 15: Contact Conversion Form */
    .contact-card-box {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      color: #FFFFFF;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .contact-info h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #FFFFFF;
    }
    .contact-info p {
      color: #94A3B8;
      font-size: 15px;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .contact-promises {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .promise-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: #CBD5E1;
    }
    .promise-item i {
      color: var(--primary);
    }
    .form-panel {
      background: #FFFFFF;
      padding: 32px;
      border-radius: var(--radius-md);
      color: var(--text-main);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    .form-privacy-note {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 12px;
      line-height: 1.5;
    }

    /* Footer */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 72px 0 32px;
      font-size: 14px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 20px;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 13.5px;
      line-height: 1.7;
      color: #64748B;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 28px;
      text-align: center;
      font-size: 12.5px;
      color: #64748B;
      line-height: 1.8;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .catalog-grid, .pain-grid, .scenario-grid, .steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .product-grid, .value-grid, .news-grid, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .data-counter-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
      }
      .counter-item {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .topbar {
        display: none;
      }
      .nav-links, .nav-action .btn {
        display: none;
      }
      .nav-toggle {
        display: block;
      }
      .hero-grid, .topology-container, .dark-grid, .narrative-box, .contact-grid {
        grid-template-columns: 1fr;
      }
      .section-padding {
        padding-top: 56px;
        padding-bottom: 56px;
      }
      .hero-section {
        padding: 40px 0 56px;
      }
      .hero-content h1 {
        font-size: 28px;
      }
      .section-header h2 {
        font-size: 24px;
      }
      .catalog-grid, .pain-grid, .scenario-grid, .steps-row, .product-grid, .value-grid, .news-grid, .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .data-counter-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .contact-card-box {
        padding: 32px 20px;
      }
    }