:root {
      --primary-color: #4F46E5;
      --primary-gradient: linear-gradient(135deg, #6366F1 0%, #4F46E5 50%, #7C3AED 100%);
      --accent-gradient: linear-gradient(135deg, #FF4694 0%, #F43F5E 50%, #FB7185 100%);
      --vivid-cyan: #06B6D4;
      --vivid-amber: #F59E0B;
      --text-dark: #0F172A;
      --text-muted: #475569;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --card-border: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(79, 70, 229, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 25px -5px rgba(79, 70, 229, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --max-width: 1200px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover {
      opacity: 0.85;
    }

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Header Section */
    header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .ai-page-home-link {
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-dark);
      padding: 6px 12px;
      border-radius: 6px;
      background: rgba(79, 70, 229, 0.08);
    }

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

    .nav-links li a {
      color: var(--text-dark);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 8px 14px;
      display: block;
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary-color);
      background: rgba(79, 70, 229, 0.05);
    }

    .header-btn {
      background: var(--primary-gradient);
      color: #fff !important;
      padding: 10px 20px !important;
      border-radius: 50px;
      font-weight: 600 !important;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }

    .header-btn:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-dark);
      cursor: pointer;
    }

    /* Section Component Basics */
    section {
      padding: 70px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
      color: var(--primary-color);
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-dark);
      letter-spacing: -0.5px;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      max-width: 700px;
      margin: 10px auto 0 auto;
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.15) 0%, rgba(248, 250, 252, 0) 70%), var(--bg-light);
      padding: 90px 0 70px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #FFFFFF;
      border: 1px solid #E2E8F0;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 24px;
    }

    .hero-badge span {
      background: var(--accent-gradient);
      color: #fff;
      padding: 2px 8px;
      border-radius: 20px;
      font-size: 0.75rem;
    }

    h1.hero-h1 {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--text-dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

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

    .hero-ctas {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 50px;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
      text-decoration: none;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #FFFFFF;
      box-shadow: 0 10px 25px rgba(79, 70, 229, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(79, 70, 229, 0.45);
      color: #FFFFFF;
    }

    .btn-secondary {
      background: #FFFFFF;
      color: var(--text-dark);
      border: 1px solid #CBD5E1;
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .btn-secondary:hover {
      background: #F1F5F9;
      transform: translateY(-2px);
      color: var(--text-dark);
    }

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

    .metric-card {
      background: #FFFFFF;
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .metric-num {
      font-size: 2.2rem;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
    }

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

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .about-item {
      padding: 16px;
      background: rgba(99, 102, 241, 0.04);
      border-left: 4px solid var(--primary-color);
      border-radius: 0 8px 8px 0;
    }

    .about-item h4 {
      font-size: 1rem;
      color: var(--text-dark);
      margin-bottom: 4px;
    }

    .about-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Services Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: #FFFFFF;
      border-radius: 16px;
      padding: 28px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 70, 229, 0.4);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.15), rgba(236, 72, 153, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
      color: var(--primary-color);
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-dark);
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      flex-grow: 1;
    }

    /* Models Cloud */
    .models-cloud {
      background: #FFFFFF;
      border-radius: 16px;
      padding: 30px;
      border: 1px solid var(--card-border);
      margin-top: 40px;
      text-align: center;
    }

    .models-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--text-dark);
    }

    .tag-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-tag {
      padding: 6px 14px;
      background: rgba(241, 245, 249, 0.8);
      border: 1px solid #E2E8F0;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #334155;
      transition: all 0.2s ease;
    }

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

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

    .process-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: 16px;
      border: 1px solid var(--card-border);
      position: relative;
    }

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

    .process-card h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    .process-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* Comparison Table */
    .rating-banner {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: #FFFFFF;
      border-radius: 16px;
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .stars {
      color: #F59E0B;
      font-size: 1.5rem;
      letter-spacing: 4px;
    }

    .score-badge {
      font-size: 2.2rem;
      font-weight: 900;
      color: #10B981;
    }

    .table-wrapper {
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: 16px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
    }

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

    table.comp-table th, table.comp-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #E2E8F0;
    }

    table.comp-table th {
      background: #F8FAFC;
      font-weight: 700;
      color: var(--text-dark);
    }

    table.comp-table tr.highlight-row {
      background: rgba(99, 102, 241, 0.05);
      font-weight: 700;
    }

    /* Token Price Reference Table */
    .token-card {
      background: #FFFFFF;
      border-radius: 16px;
      padding: 30px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
    }

    /* Cases Section */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .case-card {
      background: #FFFFFF;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #E2E8F0;
    }

    .ai-page-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .case-content {
      padding: 20px;
    }

    .case-content h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

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

    /* Reviews Section */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #FFFFFF;
      border-radius: 16px;
      padding: 24px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .review-user h5 {
      font-size: 0.95rem;
      color: var(--text-dark);
    }

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

    .review-body {
      font-size: 0.9rem;
      color: #334155;
      font-style: italic;
    }

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

    .faq-item {
      background: #FFFFFF;
      border-radius: 12px;
      border: 1px solid var(--card-border);
      margin-bottom: 14px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-dark);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-answer {
      padding: 0 24px 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      display: none;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    /* Form & Contact Section */
    .contact-card {
      background: #FFFFFF;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-lg);
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info p {
      margin-bottom: 12px;
      font-size: 0.95rem;
    }

    .qr-box {
      margin-top: 20px;
      padding: 16px;
      background: #F8FAFC;
      border-radius: 12px;
      display: inline-block;
      text-align: center;
      border: 1px solid #E2E8F0;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      display: block;
      margin: 0 auto 8px auto;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid #CBD5E1;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

    /* Footer Section */
    footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 50px 0 25px 0;
      border-top: 1px solid #1E293B;
    }

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

    .footer-col h5 {
      color: #FFFFFF;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
    }

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

    .footer-links a {
      color: #94A3B8;
      font-size: 0.85rem;
    }

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

    .friend-links {
      border-top: 1px solid #1E293B;
      padding-top: 20px;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links a {
      color: #64748B;
    }

    .friend-links a:hover {
      color: #F8FAFC;
    }

    .copyright {
      text-align: center;
      font-size: 0.85rem;
      color: #64748B;
      margin-top: 30px;
    }

    /* Articles List */
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
    }

    .article-item {
      background: #FFFFFF;
      padding: 16px 20px;
      border-radius: 12px;
      border: 1px solid var(--card-border);
    }

    .article-item a {
      font-weight: 600;
      color: var(--text-dark);
      display: block;
    }

    .article-item a:hover {
      color: var(--primary-color);
    }

    /* Floating Customer Service Entrance */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary-gradient);
      color: #FFFFFF;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 10px 25px rgba(79, 70, 229, 0.4);
      cursor: pointer;
      font-weight: 700;
      font-size: 0.85rem;
      text-align: center;
      line-height: 1.2;
    }

    /* Media Queries */
    @media (max-width: 992px) {
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .contact-card, .footer-grid {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      h1.hero-h1 {
        font-size: 2rem;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .process-grid {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
      }
    }