/* roulang page: index */
:root {
      --primary: #102a43;
      --primary-light: #1f3b58;
      --accent: #047857;
      --accent-hover: #065f46;
      --warning: #d97706;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-page: #f8fafc;
      --bg-white: #ffffff;
      --bg-dark: #0b1727;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 14px;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 4px 14px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 28px rgba(15, 23, 42, 0.12);
      --transition: all 0.25s ease;
    }
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-page);
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea, select {
      font-family: inherit;
      font-size: 1rem;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.25rem;
      padding-right: 1.25rem;
    }
    
    /* Top Bar & Header */
    .top-bar {
      background: var(--primary);
      color: #94a3b8;
      font-size: 0.85rem;
      padding: 0.5rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .top-bar-left span, .top-bar-right span {
      margin-right: 1.25rem;
    }
    .top-bar-right a {
      color: #cbd5e1;
      font-weight: 600;
    }
    .top-bar-right a:hover {
      color: #ffffff;
    }
    .site-header {
      background: var(--bg-white);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: var(--shadow-sm);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.02em;
    }
    .brand-badge {
      display: inline-block;
      width: 10px;
      height: 10px;
      background: var(--accent);
      border-radius: 50%;
    }
    .brand-sub {
      font-size: 0.75rem;
      background: #e2e8f0;
      color: #334155;
      padding: 2px 6px;
      border-radius: 4px;
      margin-left: 4px;
      font-weight: 500;
    }
    .nav-links {
      display: flex;
      gap: 1.75rem;
      list-style: none;
      align-items: center;
    }
    .nav-links a {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 500;
      transition: var(--transition);
      padding: 0.35rem 0;
      border-bottom: 2px solid transparent;
    }
    .nav-links a:hover, .nav-links a.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    .nav-cta {
      background: var(--accent);
      color: #ffffff !important;
      padding: 0.55rem 1.15rem !important;
      border-radius: var(--radius-sm);
      border-bottom: none !important;
      font-weight: 600 !important;
    }
    .nav-cta:hover {
      background: var(--accent-hover);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 0.45rem 0.75rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* Section Global Styles */
    section {
      padding: 5rem 0;
      position: relative;
    }
    .section-white {
      background: var(--bg-white);
    }
    .section-muted {
      background: var(--bg-page);
    }
    .section-dark {
      background: var(--bg-dark);
      color: #f8fafc;
    }
    .section-header {
      margin-bottom: 3.5rem;
      max-width: 820px;
    }
    .section-header.text-center {
      text-align: center;
      margin-left: auto;
      margin-right: auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--accent);
      background: #e6f4ea;
      padding: 0.25rem 0.65rem;
      border-radius: 4px;
      margin-bottom: 0.75rem;
    }
    .section-dark .section-tag {
      background: rgba(4, 120, 87, 0.2);
      color: #34d399;
    }
    .section-title {
      font-size: 2.1rem;
      line-height: 1.35;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 1rem;
    }
    .section-dark .section-title {
      color: #ffffff;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .section-dark .section-desc {
      color: #94a3b8;
    }

    /* 1. Hero Section */
    .hero-banner {
      background-image: linear-gradient(rgba(11, 23, 39, 0.88), rgba(16, 42, 67, 0.92)), url('/assets/images/b9c84633cbcb033f.jpg');
      background-size: cover;
      background-position: center;
      color: #ffffff;
      padding: 4.5rem 0 4rem;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.25fr 0.95fr;
      gap: 3rem;
      align-items: center;
    }
    .region-badge-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-bottom: 1.25rem;
    }
    .region-chip {
      font-size: 0.75rem;
      padding: 0.2rem 0.55rem;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.12);
      color: #cbd5e1;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }
    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 1.25rem;
      letter-spacing: -0.01em;
    }
    .hero-title span {
      color: #34d399;
    }
    .hero-summary {
      font-size: 1.05rem;
      color: #cbd5e1;
      line-height: 1.85;
      margin-bottom: 2rem;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 2rem;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      font-weight: 600;
      padding: 0.75rem 1.75rem;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--accent);
      color: #ffffff;
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      box-shadow: 0 4px 12px rgba(4, 120, 87, 0.35);
    }
    .btn-outline {
      background: rgba(255, 255, 255, 0.08);
      color: #ffffff;
      border-color: rgba(255, 255, 255, 0.25);
    }
    .btn-outline:hover {
      background: rgba(255, 255, 255, 0.18);
    }
    .hero-cert-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 1.25rem;
      padding-top: 1.25rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      font-size: 0.85rem;
      color: #94a3b8;
    }
    .hero-cert-item {
      display: flex;
      align-items: center;
      gap: 0.4rem;
    }
    .hero-box-portal {
      background: #ffffff;
      color: var(--text-main);
      padding: 2.25rem;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
    }
    .portal-heading {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.5rem;
    }
    .portal-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
    }
    .portal-form .form-group {
      margin-bottom: 1rem;
    }
    .portal-form label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 0.35rem;
      color: #334155;
    }
    .portal-form input, .portal-form select {
      width: 100%;
      padding: 0.65rem 0.85rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition);
    }
    .portal-form input:focus, .portal-form select:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(4, 120, 87, 0.15);
    }
    .portal-form .btn-submit {
      width: 100%;
      background: var(--primary);
      color: #ffffff;
      border: none;
      padding: 0.75rem;
      border-radius: var(--radius-sm);
      font-weight: 700;
      cursor: pointer;
      margin-top: 0.5rem;
      transition: var(--transition);
    }
    .portal-form .btn-submit:hover {
      background: var(--primary-light);
    }

    /* 2. Brand Tech Overview */
    .tech-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 3.5rem;
      align-items: center;
    }
    .tech-feature-list {
      list-style: none;
      margin-top: 1.5rem;
    }
    .tech-feature-item {
      display: flex;
      gap: 1rem;
      margin-bottom: 1.25rem;
    }
    .tech-dot {
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #e6f4ea;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      font-weight: bold;
      flex-shrink: 0;
      margin-top: 0.2rem;
    }
    .tech-item-text strong {
      display: block;
      color: var(--primary);
      margin-bottom: 0.2rem;
    }
    .tech-item-text p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .tech-image-wrap {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .tech-caption-badge {
      position: absolute;
      bottom: 1.25rem;
      left: 1.25rem;
      right: 1.25rem;
      background: rgba(16, 42, 67, 0.88);
      backdrop-filter: blur(8px);
      color: #ffffff;
      padding: 0.85rem 1.2rem;
      border-radius: var(--radius-md);
      font-size: 0.85rem;
      line-height: 1.5;
    }

    /* 3. Service Cards (3 Column) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .service-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2.25rem;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }
    .service-badge {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--accent);
      background: #f0fdf4;
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      margin-bottom: 1rem;
    }
    .service-title {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.75rem;
    }
    .service-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }
    .service-meta-list {
      list-style: none;
      font-size: 0.85rem;
      color: #334155;
      padding-top: 1rem;
      border-top: 1px solid var(--border-color);
      margin-bottom: 1.5rem;
    }
    .service-meta-list li {
      margin-bottom: 0.5rem;
      display: flex;
      justify-content: space-between;
    }
    .service-meta-list li span:first-child {
      color: #64748b;
    }
    .btn-card-link {
      color: var(--primary);
      font-size: 0.9rem;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 0.3rem;
    }
    .btn-card-link:hover {
      color: var(--accent);
    }

    /* 4. Process Steps (4 Horizontal) */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
      position: relative;
    }
    .process-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .process-num {
      width: 42px;
      height: 42px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 1.25rem;
    }
    .process-name {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.6rem;
    }
    .process-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 0.85rem;
    }
    .process-tag {
      font-size: 0.75rem;
      color: #0369a1;
      background: #f0f9ff;
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
      display: inline-block;
    }

    /* 5. 6-Grid Advantages */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.75rem;
    }
    .adv-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      transition: var(--transition);
    }
    .adv-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .adv-icon-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }
    .adv-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 6. Dark Tech Standard Section */
    .arch-flow-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
      margin-top: 2rem;
    }
    .arch-box {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 2rem;
    }
    .arch-box h3 {
      font-size: 1.15rem;
      color: #34d399;
      margin-bottom: 0.85rem;
      font-weight: 700;
    }
    .arch-box p {
      font-size: 0.9rem;
      color: #94a3b8;
      line-height: 1.75;
    }

    /* 7. Metric Stats Bar */
    .metrics-bar {
      background: var(--primary);
      color: #ffffff;
      padding: 3.5rem 0;
    }
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 2rem;
      text-align: center;
    }
    .metric-item {
      padding: 1rem;
      border-right: 1px solid rgba(255, 255, 255, 0.12);
    }
    .metric-item:last-child {
      border-right: none;
    }
    .metric-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: #34d399;
      line-height: 1.1;
      margin-bottom: 0.5rem;
      font-variant-numeric: tabular-nums;
    }
    .metric-label {
      font-size: 0.95rem;
      color: #cbd5e1;
      font-weight: 500;
    }

    /* 8. Case Studies */
    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 2rem;
    }
    .case-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .case-img-box {
      height: 220px;
      overflow: hidden;
    }
    .case-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .case-card:hover .case-img-box img {
      transform: scale(1.03);
    }
    .case-body {
      padding: 1.75rem;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }
    .case-cat {
      font-size: 0.75rem;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    .case-title {
      font-size: 1.25rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 0.75rem;
    }
    .case-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .case-result {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 0.75rem 1rem;
      font-size: 0.85rem;
      color: #334155;
    }

    /* 9. Scenarios / User Stories */
    .story-card-wrap {
      display: flex;
      flex-direction: column;
      gap: 2rem;
    }
    .story-card {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 2.5rem;
      align-items: center;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      box-shadow: var(--shadow-sm);
    }
    .story-card.reverse {
      grid-template-columns: 0.8fr 1.2fr;
    }
    .story-card.reverse .story-content {
      order: 2;
    }
    .story-card.reverse .story-thumb {
      order: 1;
    }
    .story-tag {
      font-size: 0.8rem;
      color: var(--accent);
      font-weight: 700;
      margin-bottom: 0.5rem;
    }
    .story-title {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.75rem;
    }
    .story-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.75;
      margin-bottom: 1.25rem;
    }
    .story-thumb {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }

    /* 10. Reviews Grid */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .review-stars {
      color: var(--warning);
      font-size: 1.1rem;
      margin-bottom: 0.75rem;
    }
    .review-text {
      font-size: 0.92rem;
      color: #334155;
      line-height: 1.75;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      border-top: 1px solid var(--border-color);
      padding-top: 1rem;
    }
    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .author-info strong {
      display: block;
      font-size: 0.9rem;
      color: var(--primary);
    }
    .author-info span {
      font-size: 0.8rem;
      color: #64748b;
    }

    /* 11. News & Guidelines */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .news-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 2rem;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .news-item:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .news-date {
      font-size: 0.8rem;
      color: #94a3b8;
      margin-bottom: 0.6rem;
    }
    .news-heading {
      font-size: 1.15rem;
      color: var(--primary);
      font-weight: 700;
      line-height: 1.45;
      margin-bottom: 0.75rem;
    }
    .news-snippet {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 1.25rem;
      flex-grow: 1;
    }
    .news-trigger {
      font-size: 0.88rem;
      color: var(--accent);
      font-weight: 700;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      gap: 0.25rem;
    }

    /* 12. Accordion FAQ */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 1rem;
      overflow: hidden;
    }
    .faq-btn {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 1.25rem 1.75rem;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-btn:hover {
      background: #f8fafc;
    }
    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.25s ease;
      color: var(--text-muted);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--accent);
    }
    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #ffffff;
      padding: 0 1.75rem;
    }
    .faq-item.active .faq-body {
      padding: 0 1.75rem 1.5rem 1.75rem;
    }
    .faq-content {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.8;
      border-top: 1px solid #f1f5f9;
      padding-top: 1rem;
    }

    /* 13. Conversion CTA */
    .cta-container-box {
      background: linear-gradient(135deg, #102a43 0%, #0f172a 100%);
      border-radius: var(--radius-lg);
      padding: 3.5rem;
      color: #ffffff;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 3rem;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }
    .cta-copy h2 {
      font-size: 2.1rem;
      font-weight: 800;
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    .cta-copy p {
      font-size: 1.05rem;
      color: #cbd5e1;
      line-height: 1.8;
      margin-bottom: 1.75rem;
    }
    .cta-hotline-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.75rem;
      background: rgba(255, 255, 255, 0.1);
      padding: 0.6rem 1.25rem;
      border-radius: 999px;
      font-size: 0.95rem;
      color: #34d399;
      font-weight: 600;
    }
    .cta-inline-form {
      background: #ffffff;
      padding: 2rem;
      border-radius: var(--radius-md);
      color: var(--text-main);
    }
    .cta-inline-form .form-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 0.35rem;
    }
    .cta-inline-form .form-sub {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 1.25rem;
    }
    .form-group-sm {
      margin-bottom: 0.85rem;
    }
    .form-group-sm input, .form-group-sm select {
      width: 100%;
      padding: 0.65rem 0.75rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      outline: none;
    }
    .btn-cta-submit {
      width: 100%;
      background: var(--accent);
      color: #ffffff;
      border: none;
      padding: 0.75rem;
      border-radius: var(--radius-sm);
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
      margin-top: 0.5rem;
    }
    .btn-cta-submit:hover {
      background: var(--accent-hover);
    }

    /* Footer */
    .site-footer {
      background: #09131f;
      color: #94a3b8;
      padding: 4.5rem 0 2rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 3rem;
      margin-bottom: 3.5rem;
    }
    .footer-col h3 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 1.25rem;
      letter-spacing: 0.02em;
    }
    .footer-about p {
      line-height: 1.75;
      margin-bottom: 1rem;
      color: #94a3b8;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a {
      color: #94a3b8;
      transition: var(--transition);
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-contact-list {
      list-style: none;
      line-height: 1.8;
    }
    .footer-contact-list strong {
      color: #cbd5e1;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1rem;
      font-size: 0.85rem;
    }
    .footer-bottom a {
      color: #64748b;
    }
    .footer-bottom a:hover {
      color: #cbd5e1;
    }

    /* Modal for Dynamic News Reading */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(15, 23, 42, 0.7);
      display: none;
      align-items: center;
      justify-content: center;
      z-index: 999;
      padding: 1.5rem;
    }
    .modal-overlay.open {
      display: flex;
    }
    .modal-content {
      background: #ffffff;
      border-radius: var(--radius-lg);
      max-width: 680px;
      width: 100%;
      padding: 2.5rem;
      box-shadow: var(--shadow-lg);
      position: relative;
      max-height: 90vh;
      overflow-y: auto;
    }
    .modal-close-btn {
      position: absolute;
      top: 1.25rem;
      right: 1.25rem;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: #64748b;
      cursor: pointer;
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-grid, .cta-container-box, .tech-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
      }
      .story-card, .story-card.reverse {
        grid-template-columns: 1fr;
      }
      .services-grid, .advantages-grid, .reviews-grid, .news-grid, .arch-flow-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 768px) {
      .top-bar {
        display: none;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 1.5rem 2rem;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-color);
      }
      .nav-links.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .services-grid, .advantages-grid, .reviews-grid, .news-grid, .cases-grid, .process-timeline, .arch-flow-grid {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        padding-bottom: 1.5rem;
      }
      .metric-item:last-child {
        border-bottom: none;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      .cta-container-box {
        padding: 2rem 1.5rem;
      }
    }