/* CSS Reset & Variables */
    :root {
      --primary: #2563eb;
      --primary-light: #3b82f6;
      --secondary: #ec4899;
      --accent: #f59e0b;
      --vibrant-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #ec4899 100%);
      --soft-gradient-bg: linear-gradient(180deg, #f8fafc 0%, #eff6ff 50%, #fdf2f8 100%);
      --card-bg: #ffffff;
      --card-border: #e2e8f0;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --container-width: 1200px;
      --radius: 12px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(37, 99, 235, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-hover: 0 20px 30px -10px rgba(124, 58, 237, 0.15);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background: var(--soft-gradient-bg);
      color: var(--text-main);
      line-height: 1.6;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* Unified Container */
    .site-container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Header & Navigation */
    .site-header {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--card-border);
      position: sticky;
      top: 0;
      z-index: 1000;
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      text-decoration: none;
      gap: 12px;
    }

    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      background: var(--vibrant-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li {
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text-muted);
      font-size: 0.95rem;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: 6px;
      transition: var(--transition);
      display: inline-block;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background: #eff6ff;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: none;
    }

    .btn-gradient {
      background: var(--vibrant-gradient);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    }

    .btn-gradient:hover {
      opacity: 0.95;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.35);
    }

    .btn-outline {
      border: 1px solid #cbd5e1;
      background: #ffffff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f8fafc;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle svg {
      width: 26px;
      height: 26px;
      fill: var(--text-main);
    }

    /* Main Content Sections */
    main {
      flex: 1;
      width: 100%;
    }

    .section-padding {
      padding: 72px 0;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 12px;
      background: #e0e7ff;
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 9999px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Hero Section (No Images Allowed in Hero) */
    .hero-section {
      padding: 90px 0 70px 0;
      text-align: center;
      position: relative;
      background: linear-gradient(180deg, #ffffff 0%, #f0f7ff 100%);
      border-bottom: 1px solid var(--card-border);
    }

    .hero-badge-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #fdf2f8;
      border: 1px solid #fbcfe8;
      color: var(--secondary);
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      max-width: 960px;
      margin: 0 auto 20px auto;
    }

    .hero-highlight {
      background: var(--vibrant-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px auto;
      line-height: 1.6;
    }

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

    .btn-hero-large {
      padding: 14px 34px;
      font-size: 1.1rem;
      border-radius: 10px;
    }

    /* Metrics Bar (Pure CSS Cards) */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #bfdbfe;
    }

    .metric-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Supported Models Bar */
    .models-stream {
      margin-top: 40px;
      padding: 20px;
      background: #ffffff;
      border: 1px dashed #cbd5e1;
      border-radius: var(--radius);
    }

    .stream-title {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-sub);
      margin-bottom: 12px;
      text-align: center;
    }

    .tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .model-tag {
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      padding: 5px 12px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: #eff6ff;
      color: var(--primary);
      border-color: #bfdbfe;
    }

    /* About Section */
    .about-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .about-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-top: 32px;
    }

    .about-feature {
      padding: 20px;
      background: #f8fafc;
      border-radius: var(--radius);
      border-left: 4px solid var(--primary);
    }

    .about-feature h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .about-feature p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* Cards Grids (Services / Solutions / Modules) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #c7d2fe;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: #eff6ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
    }

    .card-tag {
      margin-top: 16px;
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--secondary);
    }

    /* Image Gallery Section (Cases & Posters) */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .gallery-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .gallery-img-box {
      width: 100%;
      height: 220px;
      background: #f1f5f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .gallery-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .gallery-item:hover .gallery-img-box img {
      transform: scale(1.04);
    }

    .gallery-content {
      padding: 20px;
    }

    .gallery-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .gallery-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

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

    .process-step {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 36px;
      height: 36px;
      background: var(--vibrant-gradient);
      color: #ffffff;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Comparison Table Section */
    .compare-section {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--card-border);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .compare-badge-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid #f1f5f9;
    }

    .rating-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      background: #fffbeb;
      border: 1px solid #fef3c7;
      padding: 10px 20px;
      border-radius: 10px;
    }

    .rating-score {
      font-size: 1.8rem;
      font-weight: 900;
      color: #d97706;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--card-border);
      font-size: 0.95rem;
    }

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

    .compare-table tr:hover td {
      background: #fdfefe;
    }

    .compare-table td.highlight-cell {
      background: #eff6ff;
      color: var(--primary);
      font-weight: 600;
    }

    /* Token Price Reference Table */
    .token-table th {
      background: #f1f5f9;
    }

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

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

    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--vibrant-gradient);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }

    .author-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 10px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      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: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: #f8fafc;
      border-top: 0 solid var(--card-border);
    }

    .faq-answer-inner {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: #bfdbfe;
      box-shadow: var(--shadow-sm);
    }

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

    .faq-item.active .faq-answer {
      max-height: 250px;
      border-top-width: 1px;
    }

    /* Form & Contact Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .contact-list {
      list-style: none;
      margin: 24px 0;
    }

    .contact-list li {
      margin-bottom: 16px;
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.95rem;
      color: var(--text-muted);
    }

    .contact-list strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-box {
      margin-top: 20px;
      display: inline-block;
      text-align: center;
      padding: 12px;
      background: #f8fafc;
      border: 1px solid var(--card-border);
      border-radius: 10px;
    }

    .qr-box img {
      width: 130px;
      height: 130px;
      display: block;
      margin-bottom: 6px;
      border-radius: 6px;
    }

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

    .contact-form .form-group {
      margin-bottom: 18px;
    }

    .contact-form label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .contact-form input,
    .contact-form select,
    .contact-form textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--card-border);
      border-radius: 8px;
      font-size: 0.95rem;
      background: #fdfefe;
      color: var(--text-main);
      transition: var(--transition);
      font-family: inherit;
    }

    .contact-form input:focus,
    .contact-form select:focus,
    .contact-form textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    /* Articles / News Section */
    .article-box {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      padding: 28px;
    }

    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      text-decoration: none;
      color: var(--primary);
      background: #eff6ff;
      padding: 8px 16px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .article-link-item:hover {
      background: #dbeafe;
    }

    /* Banner Promotions Showcase */
    .promos-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 24px;
    }

    .promo-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: var(--radius);
      overflow: hidden;
    }

    .promo-card img {
      width: 100%;
      height: auto;
      display: block;
    }

    .promo-content {
      padding: 20px;
    }

    /* Footer Section */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--card-border);
      padding-top: 48px;
      padding-bottom: 24px;
      margin-top: 60px;
    }

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

    .footer-brand p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-top: 12px;
      max-width: 320px;
      line-height: 1.6;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col li {
      margin-bottom: 8px;
    }

    .footer-col a {
      text-decoration: none;
      color: var(--text-muted);
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-col a:hover {
      color: var(--primary);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .friend-links a {
      text-decoration: none;
      color: var(--text-muted);
      font-size: 0.85rem;
      background: #f1f5f9;
      padding: 4px 10px;
      border-radius: 4px;
      transition: var(--transition);
    }

    .friend-links a:hover {
      background: #e2e8f0;
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #f1f5f9;
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    .footer-bottom a {
      color: var(--text-sub);
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: var(--primary);
    }

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

    .float-btn {
      width: 46px;
      height: 46px;
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      color: var(--text-main);
    }

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

    .float-btn svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }

    /* Responsive Queries */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .metrics-grid,
      .about-grid,
      .grid-3,
      .gallery-grid,
      .reviews-grid,
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--card-border);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .metrics-grid,
      .about-grid,
      .grid-3,
      .gallery-grid,
      .reviews-grid,
      .process-timeline,
      .promos-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .section-padding {
        padding: 48px 0;
      }
      .compare-badge-row {
        flex-direction: column;
        align-items: flex-start;
      }
    }