:root {
      --primary-color: #6366f1;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
      --bg-gradient: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
      --accent-rainbow: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899, #f59e0b);
      --text-main: #0f172a;
      --text-muted: #475569;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
      --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.08);
      --shadow-lg: 0 20px 30px -10px rgba(99,102,241,0.15);
      --radius: 12px;
      --max-width: 1240px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background: #f8fafc;
      color: var(--text-main);
    }

    body {
      line-height: 1.6;
      overflow-x: hidden;
      background: var(--bg-gradient);
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      opacity: 0.85;
    }

    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* Section Styles */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 16px;
      background: linear-gradient(90deg, rgba(99,102,241,0.1), rgba(236,72,153,0.1));
      color: var(--primary-color);
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 12px;
      border: 1px solid rgba(99,102,241,0.2);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      margin-top: 8px;
    }

    /* Top Navigation */
    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

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

    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      white-space: nowrap;
    }

    .nav-links li a:hover {
      color: var(--primary-color);
    }

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

    .btn-nav {
      padding: 8px 18px;
      background: var(--primary-gradient);
      color: #fff !important;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(99,102,241,0.3);
      display: inline-block;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 20%, rgba(99,102,241,0.12) 0%, rgba(248,250,252,0) 70%);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #fff;
      border: 1px solid #e2e8f0;
      border-radius: 30px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      font-size: 14px;
      color: var(--text-muted);
    }

    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 900;
      margin-bottom: 20px;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
    }

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

    .btn-hero-primary {
      padding: 14px 36px;
      background: var(--primary-gradient);
      color: #fff;
      border-radius: 10px;
      font-size: 16px;
      font-weight: 700;
      box-shadow: var(--shadow-lg);
      transition: transform 0.2s ease;
    }

    .btn-hero-primary:hover {
      transform: translateY(-2px);
    }

    .btn-hero-secondary {
      padding: 14px 32px;
      background: #fff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      font-size: 16px;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .hero-models-tag {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 900px;
      margin: 0 auto;
    }

    .model-chip {
      padding: 6px 14px;
      background: rgba(255,255,255,0.8);
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      font-size: 12px;
      font-weight: 600;
      color: #334155;
    }

    /* Stats Section */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -40px;
    }

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

    .stat-num {
      font-size: 36px;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

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

    .service-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99,102,241,0.4);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(99,102,241,0.1), rgba(236,72,153,0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Media Banner Display */
    .banner-display-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }

    .banner-img-wrap {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }

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

    /* Step Timeline */
    .step-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-item {
      background: #fff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-num {
      font-size: 28px;
      font-weight: 900;
      color: rgba(99,102,241,0.2);
      position: absolute;
      top: 16px;
      right: 20px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Table Component */
    .table-container {
      overflow-x: auto;
      background: #fff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

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

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

    .highlight-cell {
      background: rgba(99,102,241,0.04);
      font-weight: 700;
      color: var(--primary-color);
    }

    /* Comparison Card */
    .rating-badge {
      display: inline-block;
      background: #fef3c7;
      color: #d97706;
      padding: 6px 16px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 16px;
      margin-bottom: 20px;
    }

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

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

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

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

    .author-info h4 {
      font-size: 15px;
      font-weight: 700;
    }

    .author-info p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* Accordion FAQ */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-answer {
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-muted);
      display: none;
      border-top: 1px solid #f1f5f9;
      margin-top: 4px;
      padding-top: 14px;
    }

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

    /* Form Section */
    .form-wrap {
      max-width: 680px;
      margin: 0 auto;
      background: #fff;
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary-color);
    }

    textarea.form-control {
      height: 120px;
      resize: vertical;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--primary-gradient);
      color: #fff;
      border: none;
      border-radius: 8px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
    }

    /* Footer & Extra Info */
    .footer-section {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 14px;
    }

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

    .footer-col h4 {
      color: #f8fafc;
      font-size: 16px;
      margin-bottom: 16px;
    }

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

    .footer-links li {
      margin-bottom: 10px;
    }

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

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

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

    .qr-box img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      background: #fff;
    }

    .friend-links-area {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 24px;
    }

    .friend-links-area a {
      color: #64748b;
      margin-right: 16px;
      display: inline-block;
    }

    .copyright-bar {
      text-align: center;
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      margin-top: 30px;
      font-size: 13px;
      color: #64748b;
    }

    /* Floating Widget */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #fff;
      border-radius: 50px;
      padding: 8px 16px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
    }

    /* Mobile Responsive */
    @media (max-width: 992px) {
      .services-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-display-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid, .step-flow {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .services-grid, .reviews-grid, .stats-grid, .step-flow {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }