:root {
      --primary: #4f46e5;
      --primary-accent: #06b6d4;
      --holo-grad: linear-gradient(135deg, #4f46e5 0%, #7c3aed 35%, #06b6d4 70%, #ec4899 100%);
      --holo-soft: linear-gradient(135deg, rgba(79, 70, 229, 0.08) 0%, rgba(6, 182, 212, 0.08) 50%, rgba(236, 72, 153, 0.08) 100%);
      --holo-border: linear-gradient(135deg, #a5b4fc, #67e8f9, #f472b6);
      --bg-light: #fafbfe;
      --card-bg: #ffffff;
      --text-main: #0f172a;
      --text-sub: #475569;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-holo: 0 12px 32px rgba(99, 102, 241, 0.12);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }
    body {
      background: radial-gradient(circle at 10% 10%, rgba(79, 70, 229, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 90%, rgba(6, 182, 212, 0.03) 0%, transparent 40%),
                  var(--bg-light);
      min-height: 100vh;
      overflow-x: hidden;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      display: block;
      padding: 8px 12px;
      color: var(--text-sub);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: color 0.2s ease;
    }
    .nav-links li a:hover {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid transparent;
    }
    .btn-holo {
      background: var(--holo-grad);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }
    .btn-holo:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
      color: #ffffff;
    }
    .btn-outline {
      background: #ffffff;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f8fafc;
    }
    .menu-toggle {
      display: none;
      background: transparent;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }
    .hero-section {
      padding: 70px 0 50px;
      position: relative;
    }
    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 9999px;
      background: #ffffff;
      border: 1px solid #e0e7ff;
      box-shadow: 0 2px 8px rgba(99, 102, 241, 0.08);
      margin-bottom: 24px;
    }
    .hero-badge-tag {
      background: var(--holo-grad);
      color: #ffffff;
      font-size: 11px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 9999px;
      text-transform: uppercase;
    }
    .hero-badge-text {
      font-size: 13px;
      color: var(--text-sub);
      font-weight: 500;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      background: var(--holo-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 17px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }
    .hero-stat-card {
      background: #ffffff;
      padding: 20px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: left;
      position: relative;
      overflow: hidden;
    }
    .hero-stat-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--holo-grad);
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .stat-value {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-main);
    }
    .stat-desc {
      font-size: 12px;
      color: var(--primary);
      margin-top: 4px;
      font-weight: 500;
    }
    section.page-section {
      padding: 60px 0;
    }
    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 44px;
    }
    .section-tag {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-sub);
    }
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .holo-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      position: relative;
    }
    .holo-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-holo);
      border-color: #cbd5e1;
    }
    .holo-card .card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--holo-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      margin-bottom: 16px;
    }
    .holo-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .holo-card p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-sub);
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
      transition: all 0.2s ease;
    }
    .model-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: scale(1.05);
    }
    .media-box {
      border-radius: 14px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }
    .media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-box:hover img {
      transform: scale(1.02);
    }
    .media-info {
      padding: 16px 20px;
    }
    .media-info h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .media-info p {
      font-size: 13px;
      color: var(--text-sub);
    }
    .table-container {
      background: #ffffff;
      border-radius: 14px;
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    table.data-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    table.data-table th {
      background: #f8fafc;
      padding: 16px 20px;
      font-weight: 700;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
      white-space: nowrap;
    }
    table.data-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      color: var(--text-sub);
    }
    table.data-table tr:last-child td {
      border-bottom: none;
    }
    table.data-table tr:hover td {
      background: #fafbfe;
    }
    .badge-star {
      display: inline-flex;
      align-items: center;
      color: #f59e0b;
      font-weight: 700;
      gap: 4px;
    }
    .badge-score {
      background: #ecfdf5;
      color: #059669;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: 6px;
      border: 1px solid #a7f3d0;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: var(--primary-accent);
    }
    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      font-size: 15px;
      color: var(--text-main);
      user-select: none;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.3s ease;
      color: var(--primary);
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-answer {
      display: none;
      padding: 0 22px 18px;
      color: var(--text-sub);
      font-size: 14px;
      line-height: 1.6;
      border-top: 1px dashed #f1f5f9;
      padding-top: 14px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 22px;
      position: relative;
    }
    .step-badge {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--holo-grad);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-sub);
    }
    .form-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 760px;
      margin: 0 auto;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      font-size: 14px;
      outline: none;
      transition: all 0.2s;
      background: #ffffff;
      color: var(--text-main);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
    }
    .contact-split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: start;
    }
    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .qr-wrap {
      text-align: center;
      padding: 20px;
      background: #f8fafc;
      border-radius: 12px;
      border: 1px dashed var(--border-color);
      margin-top: 20px;
    }
    .qr-wrap img {
      width: 140px;
      height: 140px;
      margin: 0 auto;
      display: block;
      border-radius: 8px;
    }
    .qr-wrap p {
      font-size: 13px;
      color: var(--text-sub);
      margin-top: 10px;
      font-weight: 500;
    }
    .articles-links-bar {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-top: 30px;
    }
    .articles-links-bar h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .link-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .link-chip {
      background: #f1f5f9;
      padding: 6px 14px;
      border-radius: 6px;
      text-decoration: none;
      color: var(--text-sub);
      font-size: 13px;
      transition: all 0.2s;
    }
    .link-chip:hover {
      background: #e2e8f0;
      color: var(--primary);
    }
    footer.site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid #1e293b;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.2s;
    }
    .footer-links-list a:hover {
      color: #38bdf8;
    }
    .footer-friend-links {
      border-top: 1px solid #1e293b;
      padding: 24px 0;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }
    .footer-friend-links span {
      color: #cbd5e1;
      font-weight: 600;
      font-size: 13px;
    }
    .footer-friend-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 13px;
      transition: color 0.2s;
    }
    .footer-friend-links a:hover {
      color: #38bdf8;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      text-decoration: none;
      transition: transform 0.2s, background-color 0.2s;
    }
    .floating-btn:hover {
      transform: scale(1.1);
      background: var(--holo-grad);
      color: #ffffff;
    }
    @media (max-width: 992px) {
      .hero-features-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-split {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 12px 0;
        width: 100%;
        border-bottom: 1px solid #f1f5f9;
      }
      .nav-actions {
        display: none;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .hero-features-bar {
        grid-template-columns: 1fr;
      }
      .card-grid-3, .card-grid-4, .card-grid-2 {
        grid-template-columns: 1fr;
      }
      .timeline-steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-container {
        padding: 24px;
      }
    }