:root {
      --primary: #2563eb;
      --primary-dark: #1d4ed8;
      --accent: #f97316;
      --accent-gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 50%, #ec4899 100%);
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-alt: #f1f5f9;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
      --shadow-md: 0 4px 12px rgba(0,0,0,0.06);
      --shadow-lg: 0 12px 24px -4px rgba(37,99,235,0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }
    *, *::before, *::after {
      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, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }
    .badge {
      display: inline-block;
      padding: 5px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(37, 99, 235, 0.1);
      border-radius: 9999px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: 0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background-color: rgba(37, 99, 235, 0.05);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: all 0.2s ease;
      cursor: pointer;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--accent-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.3);
    }
    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }
    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.08) 0%, rgba(37, 99, 235, 0.04) 40%, #f8fafc 100%);
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }
    .hero-h1 {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-h1 span {
      background: var(--accent-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-lead {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 34px;
      line-height: 1.7;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }
    .btn-hero {
      font-size: 1.1rem;
      padding: 14px 34px;
      border-radius: 9999px;
    }
    .hero-chips-wrap {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 9999px;
      padding: 6px 16px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-sub);
      box-shadow: var(--shadow-sm);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }
    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .platform-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .platform-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .platform-item {
      padding: 20px;
      border-radius: var(--radius-md);
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
    }
    .platform-item h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .platform-item p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(37, 99, 235, 0.4);
    }
    .card-top {
      margin-bottom: 16px;
    }
    .card-tag {
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(37, 99, 235, 0.08);
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 12px;
    }
    .service-card h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .workflow-strip {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-top: 30px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 30px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .strip-step {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .step-index {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--accent-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }
    .step-text h4 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .step-text p {
      font-size: 0.8rem;
      color: var(--text-sub);
    }
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }
    .model-pill {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s;
    }
    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }
    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }
    th, td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    th {
      background: var(--bg-alt);
      color: var(--text-main);
      font-weight: 700;
    }
    tr:last-child td {
      border-bottom: none;
    }
    .highlight-cell {
      background: rgba(37, 99, 235, 0.04);
      color: var(--primary);
      font-weight: 700;
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .review-content {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--accent-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }
    .author-info h4 {
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .author-info p {
      font-size: 0.8rem;
      color: var(--text-sub);
    }
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-question {
      padding: 18px 22px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      border: none;
      width: 100%;
      text-align: left;
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      transition: transform 0.2s ease;
      color: var(--text-sub);
    }
    .faq-answer {
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      display: none;
      border-top: 1px solid rgba(226, 232, 240, 0.6);
      padding-top: 14px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 20px;
      align-items: stretch;
    }
    .gallery-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .media-holder {
      background: var(--bg-alt);
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 220px;
    }
    .media-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .gallery-desc {
      padding: 16px 20px;
    }
    .gallery-desc h4 {
      font-size: 1rem;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .gallery-desc p {
      font-size: 0.85rem;
      color: var(--text-sub);
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s;
    }
    .article-item:hover {
      transform: translateY(-3px);
    }
    .article-item a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      display: block;
      margin-bottom: 8px;
    }
    .article-item a:hover {
      color: var(--primary);
    }
    .article-meta {
      font-size: 0.8rem;
      color: var(--text-sub);
    }
    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .form-info h3 {
      font-size: 1.5rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .form-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 24px;
    }
    .info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .info-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.92rem;
      color: var(--text-main);
    }
    .info-icon {
      width: 28px;
      height: 28px;
      background: rgba(37, 99, 235, 0.1);
      color: var(--primary);
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      font-weight: 700;
    }
    .form-field {
      margin-bottom: 16px;
    }
    .form-field label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-field input, .form-field select, .form-field textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      outline: none;
      background: #ffffff;
      color: var(--text-main);
      transition: border-color 0.2s;
    }
    .form-field input:focus, .form-field select:focus, .form-field textarea:focus {
      border-color: var(--primary);
    }
    .form-field textarea {
      resize: vertical;
      min-height: 80px;
    }
    .contact-card-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      text-align: center;
    }
    .contact-card-item {
      padding: 16px;
      border-radius: var(--radius-sm);
      background: var(--bg-alt);
    }
    .contact-card-item h4 {
      font-size: 1rem;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .contact-card-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .agent-banner {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 44px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }
    .agent-text h3 {
      font-size: 1.7rem;
      margin-bottom: 10px;
      color: #ffffff;
    }
    .agent-text p {
      color: #94a3b8;
      font-size: 0.98rem;
      max-width: 680px;
    }
    .footer-site {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.88rem;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      color: var(--text-muted);
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: var(--primary);
    }
    .footer-links-bar {
      border-top: 1px solid var(--border-color);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      font-size: 0.85rem;
    }
    .footer-links-bar a {
      color: var(--text-sub);
    }
    .footer-links-bar a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-sub);
      font-size: 0.82rem;
      flex-wrap: wrap;
      gap: 10px;
    }
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.2s;
      position: relative;
    }
    .float-btn:hover {
      transform: scale(1.08);
    }
    .qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      display: none;
      width: 140px;
      text-align: center;
    }
    .qr-popup img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
    }
    .qr-popup p {
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-top: 6px;
    }
    .float-btn:hover .qr-popup {
      display: block;
    }
    @media (max-width: 992px) {
      .stats-grid, .cards-grid-3, .review-grid, .platform-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .gallery-grid {
        grid-template-columns: 1fr;
      }
      .contact-card-box {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .agent-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .hero-h1 {
        font-size: 2rem;
      }
      .stats-grid, .cards-grid-3, .review-grid, .platform-grid, .articles-grid, .contact-card-box {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .workflow-strip {
        flex-direction: column;
        align-items: flex-start;
      }
    }