:root {
      --primary: #7c3aed;
      --primary-hover: #6d28d9;
      --primary-light: #f3e8ff;
      --primary-dark: #4c1d95;
      --accent: #c084fc;
      --text-main: #1e1b4b;
      --text-muted: #64748b;
      --bg-main: #faf5ff;
      --bg-card: #ffffff;
      --border-color: #e9d5ff;
      --shadow: 0 10px 30px -10px rgba(124, 58, 237, 0.15);
      --shadow-hover: 0 20px 40px -15px rgba(124, 58, 237, 0.25);
      --radius: 12px;
      --max-width: 1200px;
    }

    * {
      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;
    }

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

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.3s ease;
    }

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

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

    /* Section Styling */
    section {
      padding: 70px 0;
      position: relative;
    }

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

    .section-subtitle {
      display: inline-block;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 16px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Header & Nav */
    header {
      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);
      box-shadow: 0 4px 20px rgba(124, 58, 237, 0.05);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* Strictly set as required */
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 10px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 8px;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.3s ease;
      border: none;
      text-decoration: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #9333ea 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    }

    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary);
      color: var(--primary) !important;
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

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

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 30%, rgba(192, 132, 252, 0.18) 0%, rgba(250, 245, 255, 0) 70%), var(--bg-main);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 14px;
      color: var(--primary-dark);
      margin-bottom: 24px;
      box-shadow: 0 4px 12px rgba(124, 58, 237, 0.08);
    }

    .hero-badge span {
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      padding: 2px 8px;
      border-radius: 10px;
      font-weight: 600;
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title-highlight {
      background: linear-gradient(135deg, #6d28d9 0%, #c084fc 100%);
      -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;
      line-height: 1.7;
    }

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

    .hero-btn-large {
      padding: 14px 36px;
      font-size: 17px;
      border-radius: 10px;
    }

    /* Stats Grid */
    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .stat-card {
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-5px);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 30px;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }

    .card-icon {
      width: 50px;
      height: 50px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .card-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Model Tags Matrix */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      background: var(--bg-card);
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
    }

    .model-tag {
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 8px 18px;
      border-radius: 20px;
      font-size: 14px;
      font-weight: 600;
      border: 1px solid rgba(124, 58, 237, 0.15);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.05);
    }

    /* Table Component */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
    }

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

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
    }

    .custom-table th {
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 700;
      font-size: 15px;
    }

    .custom-table tr:hover {
      background: #faf5ff;
    }

    .highlight-cell {
      color: var(--primary);
      font-weight: 700;
    }

    /* Review & Comparison Highlight Card */
    .rating-box {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
      color: #ffffff;
      padding: 40px;
      border-radius: var(--radius);
      text-align: center;
      margin-bottom: 40px;
      box-shadow: var(--shadow);
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 28px;
      margin-bottom: 10px;
    }

    .rating-score {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
      margin-bottom: 8px;
    }

    .rating-sub {
      font-size: 16px;
      opacity: 0.9;
    }

    /* Media Gallery Area */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      margin-top: 30px;
    }

    .media-item {
      background: var(--bg-card);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow);
    }

    .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-item:hover .ai-page-image {
      transform: scale(1.03);
    }

    .media-info {
      padding: 16px;
    }

    .media-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

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

    .step-number {
      font-size: 36px;
      font-weight: 900;
      color: var(--accent);
      opacity: 0.4;
      position: absolute;
      top: 15px;
      right: 20px;
    }

    .step-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
    }

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

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

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .user-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 16px;
    }

    .user-info-name {
      font-weight: 700;
      font-size: 16px;
    }

    .user-info-role {
      font-size: 13px;
      color: var(--text-muted);
    }

    .review-content {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.6;
    }

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

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

    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 17px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--bg-card);
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 22px;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

    .faq-item.active .faq-question::after {
      content: '−';
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #faf7ff;
      color: var(--text-muted);
      font-size: 15px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
    }

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

    .contact-info-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
      margin-top: 24px;
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }

    .contact-info-icon {
      width: 40px;
      height: 40px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .qr-box {
      margin-top: 20px;
      text-align: center;
      max-width: 180px;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #fff;
    }

    .qr-box img {
      width: 100%;
      height: auto;
      border-radius: 4px;
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 15px;
      outline: none;
      transition: border-color 0.3s;
      background: #fff;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.1);
    }

    /* Footer */
    footer {
      background: #111827;
      color: #9ca3af;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1f2937;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 20px;
      font-weight: 700;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #9ca3af;
      font-size: 14px;
    }

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

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

    .friend-links a {
      color: #9ca3af;
      font-size: 13px;
      background: #1f2937;
      padding: 4px 10px;
      border-radius: 4px;
    }

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

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      text-align: center;
      font-size: 14px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
    }

    .ai-page-home-link {
      color: #9ca3af;
      font-weight: 600;
    }

    .ai-page-home-link:hover {
      color: #ffffff;
    }

    /* Floating Widget */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary);
      color: #fff;
      width: 56px;
      height: 56px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(124, 58, 237, 0.4);
      cursor: pointer;
      transition: transform 0.3s ease;
    }

    .floating-kefu:hover {
      transform: scale(1.1);
    }

    /* Responsive Design */
    @media (max-width: 992px) {
      .hero-title { font-size: 34px; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .step-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show { display: flex; }
      .mobile-menu-btn { display: block; }
      .hero-btns { flex-direction: column; width: 100%; }
      .btn { width: 100%; }
      .hero-stats { grid-template-columns: 1fr; }
      .step-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; justify-content: center; }
    }