:root {
      --bg-main: #f5f8fc;
      --bg-card: #ffffff;
      --text-main: #141b2d;
      --text-muted: #5c6b82;
      --neon-cyan: #00d2ff;
      --neon-magenta: #ff007f;
      --neon-lime: #00e676;
      --primary: #0052d9;
      --primary-hover: #003cab;
      --border-color: #dbe4f0;
      --shadow-sm: 0 4px 12px rgba(0, 82, 217, 0.06);
      --shadow-glow: 0 8px 24px rgba(0, 210, 255, 0.15);
      --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;
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(0, 210, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(255, 0, 127, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(0, 230, 118, 0.04) 0%, transparent 50%);
      background-attachment: fixed;
    }

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

    header.site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 1000;
      border-bottom: 2px solid transparent;
      border-image: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta), var(--neon-lime)) 1;
      box-shadow: var(--shadow-sm);
    }

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

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 1.25rem;
      font-weight: 700;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s, background 0.2s;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: rgba(0, 82, 217, 0.05);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      border-radius: 6px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: transform 0.2s, box-shadow 0.2s, background-color 0.2s;
    }

    .btn:active {
      transform: scale(0.98);
    }

    .btn-glow {
      background: linear-gradient(135deg, #0052d9 0%, #00d2ff 100%);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(0, 210, 255, 0.4);
      border: none;
    }

    .btn-glow:hover {
      background: linear-gradient(135deg, #003cab 0%, #00b0d8 100%);
      box-shadow: 0 6px 20px rgba(0, 210, 255, 0.6);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border: 2px solid var(--neon-cyan);
    }

    .btn-outline:hover {
      background: rgba(0, 210, 255, 0.08);
      border-color: var(--primary);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    section {
      padding: 64px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 20px;
      background: linear-gradient(90deg, rgba(0, 210, 255, 0.15), rgba(255, 0, 127, 0.15));
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid rgba(0, 210, 255, 0.3);
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 30px;
      background: #ffffff;
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 2px 10px rgba(0, 210, 255, 0.2);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background: var(--neon-lime);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--neon-lime);
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(120deg, var(--primary) 0%, var(--neon-magenta) 50%, var(--neon-cyan) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }

    .hero-ctas {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }

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

    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-glow);
      border-color: var(--neon-cyan);
    }

    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--neon-cyan), var(--neon-magenta));
    }

    .metric-value {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

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

    .intro-box {
      background: var(--bg-card);
      border-radius: 12px;
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s;
    }

    .intro-box:hover {
      transform: translateY(-4px);
      border-color: var(--neon-cyan);
    }

    .intro-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(0, 210, 255, 0.15), rgba(0, 82, 217, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-weight: 800;
      font-size: 1.2rem;
      border: 1px solid rgba(0, 210, 255, 0.4);
    }

    .intro-box h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .intro-box p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      border-color: var(--neon-magenta);
      box-shadow: 0 8px 24px rgba(255, 0, 127, 0.12);
      transform: translateY(-4px);
    }

    .service-card-tag {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 10px;
      border-radius: 4px;
      background: rgba(0, 82, 217, 0.08);
      color: var(--primary);
      margin-bottom: 14px;
      border-left: 3px solid var(--neon-cyan);
    }

    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .model-tags-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 16px;
    }

    .model-tag {
      padding: 8px 16px;
      background: #f0f4fa;
      border: 1px solid #d2deed;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s;
    }

    .model-tag:hover {
      background: #ffffff;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 210, 255, 0.3);
      color: var(--primary);
    }

    .process-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

    .timeline-step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-number {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--primary));
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(0, 82, 217, 0.3);
    }

    .timeline-step h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .timeline-step p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .case-card {
      background: var(--bg-card);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, border-color 0.2s;
    }

    .case-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-cyan);
    }

    .case-media {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #e6edf5;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-media.square {
      aspect-ratio: 1 / 1;
    }

    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s;
    }

    .case-card:hover .case-media img {
      transform: scale(1.03);
    }

    .case-content {
      padding: 20px;
    }

    .case-content h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .eval-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 2px solid #edf2f7;
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
      background: linear-gradient(135deg, rgba(0, 210, 255, 0.1), rgba(255, 0, 127, 0.1));
      padding: 16px 24px;
      border-radius: 12px;
      border: 1px solid rgba(0, 210, 255, 0.3);
    }

    .score-stars {
      color: #ff9800;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

    .score-num {
      font-size: 1.75rem;
      font-weight: 900;
      color: var(--primary);
    }

    .table-wrapper {
      width: 100%;
      overflow-x: auto;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

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

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

    .eval-table td.highlight {
      color: var(--primary);
      font-weight: 700;
      background: rgba(0, 210, 255, 0.04);
    }

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

    .token-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s;
    }

    .token-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-lime);
    }

    .token-name {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .token-price {
      font-size: 1.75rem;
      font-weight: 900;
      color: var(--neon-magenta);
      margin-bottom: 8px;
    }

    .token-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-magenta));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .reviewer-details h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-details p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .faq-container {
      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;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 1rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #ffffff;
      transition: background-color 0.2s;
    }

    .faq-question:hover {
      background: #f8fafc;
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.2s ease;
      color: var(--primary);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      background: #fbfcfe;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      padding: 16px 24px 20px;
      max-height: 250px;
      border-top: 1px solid #edf2f7;
    }

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

    .article-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .article-card a {
      color: var(--primary);
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 0.9rem;
    }

    .article-card a:hover {
      text-decoration: underline;
    }

    .contact-form-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .contact-info p {
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.6;
    }

    .contact-meta-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .contact-meta-list li {
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .contact-meta-list strong {
      color: var(--text-muted);
      display: inline-block;
      width: 90px;
    }

    .qr-container {
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      padding: 12px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: 8px;
    }

    .qr-container img {
      width: 120px;
      height: 120px;
      object-fit: cover;
      margin-bottom: 6px;
    }

    .qr-container span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
      background: #ffffff;
      color: var(--text-main);
    }

    .form-control:focus {
      border-color: var(--neon-cyan);
      box-shadow: 0 0 0 3px rgba(0, 210, 255, 0.2);
    }

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

    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      color: var(--text-muted);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 36px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      margin-top: 12px;
      line-height: 1.6;
    }

    .footer-links h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .footer-links ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s;
    }

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

    .friend-links-wrap {
      border-top: 1px solid #edf2f7;
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links-wrap strong {
      color: var(--text-main);
    }

    .friend-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }

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

    .footer-bottom {
      border-top: 1px solid #edf2f7;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #8c9ba5;
    }

    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      background: #ffffff;
      border: 1px solid var(--neon-cyan);
      box-shadow: 0 4px 16px rgba(0, 210, 255, 0.3);
      border-radius: 30px;
      padding: 10px 18px;
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.9rem;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .floating-kefu:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 20px rgba(0, 210, 255, 0.5);
    }

    .kefu-dot {
      width: 10px;
      height: 10px;
      background: var(--neon-lime);
      border-radius: 50%;
      box-shadow: 0 0 6px var(--neon-lime);
    }

    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .platform-intro-grid,
      .services-grid,
      .case-grid,
      .reviews-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(3, 1fr);
      }
      .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-form-layout {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        box-shadow: var(--shadow-sm);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .platform-intro-grid,
      .services-grid,
      .case-grid,
      .reviews-grid,
      .articles-grid,
      .token-grid,
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .eval-header {
        flex-direction: column;
        align-items: flex-start;
      }
    }