/* CSS Reset & Variables */
    :root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --primary-light: #eff6ff;
      --accent: #0ea5e9;
      --accent-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-sub: #f1f5f9;
      --border-color: #e2e8f0;
      --border-hover: #cbd5e1;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 25px -3px rgba(37, 99, 235, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 16px 32px -4px rgba(37, 99, 235, 0.12), 0 8px 12px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1200px;
      --transition: all 0.25s ease-in-out;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    /* Container System */
    .site-container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-tag {
      background: var(--primary-light);
      color: var(--primary);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 2px 8px;
      border-radius: var(--radius-full);
      margin-left: 4px;
    }

    .site-nav {
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-link {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-link:hover, .nav-link.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--accent-gradient);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .btn-secondary {
      background: #f1f5f9;
      color: var(--text-main);
    }

    .btn-secondary:hover {
      background: #e2e8f0;
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 1.05rem;
    }

    .btn-hero-official {
      background: linear-gradient(135deg, #1d4ed8 0%, #0284c7 100%);
      color: #ffffff !important;
      font-size: 1.15rem;
      padding: 16px 36px;
      border-radius: var(--radius-full);
      font-weight: 700;
      box-shadow: 0 10px 25px rgba(37, 99, 235, 0.35);
      animation: pulseAttention 2.5s infinite;
    }

    .btn-hero-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 30px rgba(37, 99, 235, 0.45);
    }

    @keyframes pulseAttention {
      0%, 100% { box-shadow: 0 10px 25px rgba(37, 99, 235, 0.35); }
      50% { box-shadow: 0 12px 30px rgba(6, 182, 212, 0.5); }
    }

    /* Mobile Nav Toggle */
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 4px;
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      padding: 64px 0 54px;
      background: radial-gradient(100% 70% at 50% 0%, #ebf5ff 0%, #f8fafc 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid #bfdbfe;
      padding: 6px 18px;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      display: inline-block;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: clamp(2rem, 4vw, 3rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 20px;
    }

    .hero-subtitle {
      max-width: 860px;
      margin: 0 auto 36px;
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-value {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-sub);
      margin-top: 4px;
      font-weight: 500;
    }

    /* Section Global Styles */
    .site-section {
      padding: 72px 0;
      position: relative;
    }

    .site-section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.825rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: var(--radius-full);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* Cards & Grid System */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
      align-items: center;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #93c5fd;
    }

    .feature-icon-wrapper {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .feature-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 16px;
    }

    .feature-tag-pill {
      font-size: 0.75rem;
      background: #f1f5f9;
      color: var(--text-muted);
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* Model Badges Grid */
    .model-tags-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .model-badge-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      transition: var(--transition);
    }

    .model-pill:hover {
      background: var(--primary-light);
      color: var(--primary);
      border-color: #93c5fd;
      transform: translateY(-2px);
    }

    .model-pill-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #3b82f6;
    }

    /* Comparison Table Component */
    .rating-banner {
      background: linear-gradient(135deg, #1e3a8a 0%, #1e40af 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: var(--shadow-md);
    }

    .rating-title {
      font-size: 1.5rem;
      font-weight: 700;
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .stars-display {
      color: #f59e0b;
      font-size: 1.5rem;
      letter-spacing: 2px;
    }

    .score-badge {
      background: #ffffff;
      color: #1e3a8a;
      font-weight: 800;
      font-size: 1.6rem;
      padding: 6px 16px;
      border-radius: var(--radius-md);
    }

    .comparison-table-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .comparison-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .col-highlight {
      background-color: #f0f7ff !important;
      font-weight: 600;
      color: var(--primary);
    }

    .check-icon {
      color: #10b981;
      font-weight: bold;
      margin-right: 4px;
    }

    .cross-icon {
      color: #ef4444;
      font-weight: bold;
      margin-right: 4px;
    }

    /* Workflow Steps */
    .workflow-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--accent-gradient);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* Showcase & Material Images */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .case-banner-wrapper {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-content {
      padding: 16px 20px;
    }

    .media-content h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--text-main);
    }

    .media-content p {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    .banner-tri-group {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    /* Reviews Section */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar-text {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
    }

    .review-author h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-author span {
      font-size: 0.8rem;
      color: var(--text-sub);
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 0.9rem;
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #93c5fd;
    }

    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.25s ease;
      flex-shrink: 0;
      margin-left: 12px;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background-color: #fafbfc;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      border-top: 1px solid var(--border-color);
    }

    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Form Section */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* News & Article links */
    .article-links-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .article-links-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 12px;
      margin-top: 14px;
    }

    .article-link-item {
      display: block;
      padding: 10px 14px;
      background: #f8fafc;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 0.875rem;
      color: var(--text-muted);
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      transition: var(--transition);
    }

    .article-link-item:hover {
      background: var(--primary-light);
      color: var(--primary);
      border-color: #93c5fd;
    }

    /* Contact & QR Showcase */
    .contact-card-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .contact-icon {
      width: 42px;
      height: 42px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 700;
      flex-shrink: 0;
    }

    .contact-text-box h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .contact-text-box p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .qr-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .qr-card img {
      width: 160px;
      height: 160px;
      margin: 0 auto 14px;
      display: block;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 4px;
      background: #ffffff;
    }

    /* Footer */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.9rem;
    }

    .footer-links a {
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: #ffffff;
    }

    .friend-links-group {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }

    .friend-links-group a {
      display: inline-block;
      background: #1e293b;
      color: #cbd5e1;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.825rem;
      border: 1px solid #334155;
    }

    .friend-links-group a:hover {
      color: #38bdf8;
      border-color: #38bdf8;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: #64748b;
    }

    .footer-bottom a {
      color: #64748b;
    }

    .footer-bottom a:hover {
      color: #94a3b8;
    }

    /* Floating Customer Service & BackToTop */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 1.2rem;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    .float-qr-pop {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
    }

    .float-qr-pop p {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 6px;
    }

    .float-btn-qr:hover .float-qr-pop {
      display: block;
    }

    /* Responsive Queries */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .workflow-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .nav-toggle { display: block; }
      .site-nav {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
      }
      .site-nav.open { display: flex; }
      .nav-links {
        flex-direction: column;
        width: 100%;
        align-items: flex-start;
      }
      .nav-link {
        width: 100%;
        padding: 10px 0;
      }
      .nav-actions {
        width: 100%;
        margin-left: 0;
        margin-top: 14px;
        justify-content: flex-start;
      }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
      .stat-item { border-right: none; }
      .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
      .workflow-grid { grid-template-columns: 1fr; }
      .case-gallery-grid { grid-template-columns: 1fr; }
      .banner-tri-group { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group-full { grid-column: span 1; }
      .contact-card-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }