/* CSS Root Variable System - High Saturation Vibrant Color Style */
    :root {
      --primary-color: #6366f1;
      --primary-gradient: linear-gradient(135deg, #7000ff 0%, #00d4ff 100%);
      --accent-gradient: linear-gradient(135deg, #ff007a 0%, #7000ff 100%);
      --vibrant-orange: #ff5e00;
      --vibrant-cyan: #00f2fe;
      --vibrant-pink: #ff007a;
      --dark-text: #0f172a;
      --body-text: #334155;
      --muted-text: #64748b;
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --bg-glass: rgba(255, 255, 255, 0.85);
      --border-color: #e2e8f0;
      --border-vibrant: rgba(112, 0, 255, 0.2);
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 25px -5px rgba(112, 0, 255, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 35px -10px rgba(112, 0, 255, 0.18);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
      background-color: var(--bg-base);
      color: var(--body-text);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #f1f5f9 0%, #f8fafc 50%, #eef2ff 100%);
    }

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

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: var(--bg-glass);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

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

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

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

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    /* Mandatory Rules Enforcement: .nav-links gap: 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--dark-text);
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
      transition: all 0.25s ease;
      border-radius: var(--radius-sm);
      margin: 0 2px;
    }

    .nav-links li a:hover {
      color: #7000ff;
      background: rgba(112, 0, 255, 0.06);
    }

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

    /* Vibrant Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 99px;
      text-decoration: none;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      cursor: pointer;
      border: none;
      outline: none;
      box-shadow: var(--shadow-sm);
    }

    .btn-vibrant {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(112, 0, 255, 0.35);
    }

    .btn-vibrant:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(112, 0, 255, 0.5);
      color: #ffffff;
    }

    .btn-accent {
      background: var(--accent-gradient);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(255, 0, 122, 0.3);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(255, 0, 122, 0.45);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--dark-text);
      border: 2px solid #7000ff;
    }

    .btn-outline:hover {
      background: #7000ff;
      color: #ffffff;
    }

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

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

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(112, 0, 255, 0.1), rgba(0, 242, 254, 0.1));
      color: #7000ff;
      border-radius: 50px;
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 14px;
      border: 1px solid rgba(112, 0, 255, 0.2);
    }

    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--muted-text);
    }

    /* Hero Section - STRICT NO IMAGES */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 20%, rgba(112, 0, 255, 0.08) 0%, rgba(0, 242, 254, 0.03) 50%, transparent 100%);
      text-align: center;
    }

    .hero-inner {
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--dark-text);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 19px;
      color: var(--body-text);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .stat-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      box-shadow: var(--shadow-md);
      transition: transform 0.3s ease;
      position: relative;
      overflow: hidden;
    }

    .stat-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--primary-gradient);
    }

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

    .stat-number {
      font-size: 32px;
      font-weight: 900;
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--muted-text);
      font-weight: 600;
    }

    /* Models Cloud Section */
    .models-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 6px 14px;
      border-radius: 50px;
      font-size: 13px;
      font-weight: 600;
      color: var(--dark-text);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      border-color: #7000ff;
      color: #7000ff;
      transform: scale(1.05);
    }

    /* Cards & Grid Styling */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(112,0,255,0.1), rgba(0,242,254,0.15));
      color: #7000ff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 20px;
    }

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

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

    /* Comparison Table Component */
    .comparison-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      padding: 30px;
      border: 1px solid var(--border-color);
      overflow-x: auto;
    }

    .rating-banner {
      background: linear-gradient(90deg, #7000ff 0%, #ff007a 100%);
      color: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 15px;
    }

    .rating-banner-title {
      font-size: 20px;
      font-weight: 800;
    }

    .rating-banner-score {
      font-size: 24px;
      font-weight: 900;
      background: #ffffff;
      color: #7000ff;
      padding: 6px 18px;
      border-radius: 50px;
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 15px;
    }

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

    .custom-table tr:hover {
      background: #f1f5f9;
    }

    .highlight-cell {
      color: #7000ff;
      font-weight: 700;
    }

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

    .step-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
      box-shadow: var(--shadow-sm);
    }

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

    /* Showcase & Banner Images Section */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .ai-page-image {
      width: 100%;
      height: 240px;
      object-fit: cover;
      display: block;
    }

    .showcase-body {
      padding: 20px;
    }

    /* Reviews Section */
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      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: 800;
    }

    .review-author {
      font-weight: 700;
      color: var(--dark-text);
      font-size: 15px;
    }

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

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

    /* FAQ Accordion Component */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      color: var(--dark-text);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      transition: background 0.2s ease;
    }

    .faq-question:hover {
      background: #f8fafc;
    }

    .faq-icon {
      font-size: 20px;
      transition: transform 0.3s ease;
      color: #7000ff;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
      color: var(--muted-text);
      font-size: 15px;
      line-height: 1.7;
    }

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

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

    /* Form Section */
    .form-wrapper {
      background: #ffffff;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      padding: 40px;
      border: 1px solid var(--border-color);
      max-width: 800px;
      margin: 0 auto;
    }

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

    .form-label {
      display: block;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
      font-size: 14px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 15px;
      outline: none;
      transition: border-color 0.25s ease;
      background: #f8fafc;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: #7000ff;
      background: #ffffff;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    /* Articles & Friendly Links Section */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .article-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .article-link {
      color: #7000ff;
      text-decoration: none;
      font-weight: 600;
      font-size: 14px;
    }

    .article-link:hover {
      text-decoration: underline;
    }

    /* Contact Info Card */
    .contact-info-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      margin-bottom: 40px;
    }

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

    .qr-img {
      max-width: 140px;
      height: auto;
      border-radius: 8px;
      margin-top: 10px;
      border: 1px solid var(--border-color);
    }

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

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

    .footer-brand {
      color: #ffffff;
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-desc {
      font-size: 14px;
      line-height: 1.6;
    }

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

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

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

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: #00f2fe;
    }

    .friendly-links-wrap a {
      color: #94a3b8;
      margin-right: 12px;
      display: inline-block;
      text-decoration: none;
      font-size: 14px;
    }

    .friendly-links-wrap a:hover {
      color: #00f2fe;
    }

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

    .ai-page-home-link {
      color: #00f2fe;
      text-decoration: none;
    }

    /* Floating Customer Service Button */
    .floating-kefu {
      position: fixed;
      bottom: 30px;
      right: 30px;
      z-index: 999;
      background: var(--accent-gradient);
      color: #ffffff;
      padding: 14px 22px;
      border-radius: 50px;
      box-shadow: 0 10px 25px rgba(255, 0, 122, 0.4);
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      font-weight: 700;
      font-size: 14px;
      transition: transform 0.3s ease;
    }

    .floating-kefu:hover {
      transform: scale(1.06);
    }

    /* Responsive Media Queries */
    @media (max-width: 992px) {
      .hero-h1 { font-size: 32px; }
      .grid-3, .grid-4, .hero-stats-grid, .timeline-steps, .showcase-grid, .contact-info-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }

      .nav-links.active {
        display: flex;
      }

      .mobile-toggle {
        display: block;
      }

      .grid-2, .grid-3, .grid-4, .hero-stats-grid, .timeline-steps, .showcase-grid, .contact-info-grid, .articles-grid, .form-grid {
        grid-template-columns: 1fr;
      }

      .hero-h1 { font-size: 26px; }
      .section-title { font-size: 26px; }
      .footer-grid { grid-template-columns: 1fr; }
    }