:root {
      --primary: #7c3aed;
      --primary-hover: #6d28d9;
      --primary-light: #f5f3ff;
      --primary-glow: rgba(124, 58, 237, 0.15);
      --secondary: #ec4899;
      --accent: #8b5cf6;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-focus: #c4b5fd;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(124, 58, 237, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --radius-full: 9999px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .header-nav {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

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

    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9375rem;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.35);
    }

    .btn-primary:hover {
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.45);
      transform: translateY(-1px);
      color: #ffffff;
    }

    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background-color: #ffffff;
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .btn-sm {
      padding: 6px 14px;
      font-size: 0.875rem;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% -20%, #ede9fe 0%, #f8fafc 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ede9fe;
      color: var(--primary);
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
      border: 1px solid #ddd6fe;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-highlight {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.125rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }

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

    .model-ticker {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 18px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .ticker-label {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--text-muted);
      text-transform: uppercase;
    }

    .ticker-tag {
      font-size: 0.8125rem;
      background: var(--bg-subtle);
      color: var(--text-main);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-weight: 500;
    }

    .section-wrap {
      padding: 80px 0;
    }

    .section-bg-alt {
      background-color: #ffffff;
    }

    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-heading {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 60px;
    }

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

    .stat-card:hover {
      border-color: var(--border-focus);
      box-shadow: var(--shadow-lg);
      transform: translateY(-2px);
    }

    .stat-value {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .stat-title {
      font-size: 0.9375rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .services-grid {
      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: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.25rem;
      margin-bottom: 18px;
    }

    .service-title {
      font-size: 1.1875rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 18px;
      flex-grow: 1;
    }

    .service-tags {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .service-tag-item {
      font-size: 0.75rem;
      padding: 3px 8px;
      background: var(--bg-subtle);
      border-radius: 4px;
      color: var(--text-light);
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .feature-item {
      display: flex;
      gap: 16px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
    }

    .feature-number {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      min-width: 32px;
    }

    .feature-content h4 {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .feature-content p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-badge {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      width: 36px;
      height: 36px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #ede9fe 0%, #fce7f3 100%);
      padding: 20px 28px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
      border: 1px solid #ddd6fe;
    }

    .rating-score {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--primary);
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.25rem;
      margin-left: 8px;
    }

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

    .compare-table th, .compare-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.9375rem;
    }

    .compare-table th {
      background-color: var(--bg-subtle);
      font-weight: 600;
      color: var(--text-main);
    }

    .compare-highlight {
      background-color: var(--primary-light);
      font-weight: 600;
      color: var(--primary);
    }

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

    .showcase-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .showcase-img-wrap {
      width: 100%;
      height: 200px;
      background: var(--bg-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .showcase-body {
      padding: 20px;
    }

    .showcase-title {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .showcase-text {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .reviews-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;
    }

    .review-text {
      font-size: 0.9375rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      font-style: italic;
    }

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

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

    .author-name {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-role {
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 900px;
      margin: 0 auto;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 1.0625rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: var(--transition);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: var(--bg-page);
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.9375rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
    }

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

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
    }

    .info-item {
      margin-bottom: 24px;
    }

    .info-title {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-light);
      margin-bottom: 6px;
    }

    .info-val {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .qr-box {
      margin-top: 24px;
      padding: 16px;
      background: var(--bg-subtle);
      border-radius: var(--radius-md);
      display: inline-block;
      text-align: center;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      display: block;
      margin: 0 auto 8px;
      border-radius: var(--radius-sm);
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 0.9375rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.9375rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background-color: var(--bg-page);
      color: var(--text-main);
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      font-size: 0.875rem;
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
    }

    .article-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .agent-box {
      background: linear-gradient(135deg, #4c1d95 0%, #7c3aed 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 50px 40px;
      text-align: center;
      margin-top: 40px;
    }

    .agent-title {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .agent-desc {
      font-size: 1.0625rem;
      opacity: 0.9;
      max-width: 700px;
      margin: 0 auto 30px;
    }

    .agent-features {
      display: flex;
      justify-content: center;
      gap: 30px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }

    .agent-feat-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
    }

    .footer-wrap {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-muted);
    }

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

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

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

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

    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.875rem;
      transition: var(--transition);
    }

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

    .friend-links-area {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 0.8125rem;
      transition: var(--transition);
    }

    .friend-links-list a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.8125rem;
      color: var(--text-light);
    }

    .floating-actions {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      text-decoration: none;
      font-size: 1.25rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: scale(1.05);
    }

    @media (max-width: 992px) {
      .services-grid, .showcase-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid, .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.25rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .services-grid, .showcase-grid, .reviews-grid, .features-grid {
        grid-template-columns: 1fr;
      }
      .stats-grid, .step-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.875rem;
      }
      .rating-banner {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .compare-container {
        overflow-x: auto;
      }
    }