:root {
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --border-color: rgba(226, 232, 240, 0.9);
      --holo-cyan: #00f2fe;
      --holo-blue: #4facfe;
      --holo-purple: #9b51e0;
      --holo-pink: #f72585;
      --holo-grad: linear-gradient(135deg, #4facfe 0%, #00f2fe 50%, #9b51e0 100%);
      --holo-glow: 0 10px 30px -10px rgba(79, 172, 254, 0.35);
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 12px 24px -6px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 20px 35px -8px rgba(15, 23, 42, 0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-width: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
      position: relative;
    }
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: 
        radial-gradient(circle at 10% 20%, rgba(79, 172, 254, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(247, 37, 133, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(155, 81, 224, 0.03) 0%, transparent 60%);
      z-index: -1;
      pointer-events: none;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    img {
      display: block;
      max-width: 100%;
      height: auto;
    }
    .container {
      width: 100%;
      max-width: var(--container-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }
    
    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(16px);
      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-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }
    .brand-title {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.5px;
      color: var(--text-main);
    }
    .brand-title span {
      background: var(--holo-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--holo-purple);
      background: rgba(155, 81, 224, 0.05);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-official {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff !important;
      background: var(--holo-grad);
      box-shadow: var(--holo-glow);
      border: 1px solid rgba(255, 255, 255, 0.4);
      cursor: pointer;
      transform: translateY(0);
      transition: all 0.25s ease;
    }
    .btn-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 25px rgba(79, 172, 254, 0.45);
    }
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background-color: var(--text-main);
      margin: 4px 0;
      transition: 0.3s;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
    }
    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(79, 172, 254, 0.08);
      border: 1px solid rgba(79, 172, 254, 0.25);
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      color: #0284c7;
      margin-bottom: 24px;
    }
    .hero-badge::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--holo-cyan);
      box-shadow: 0 0 8px var(--holo-cyan);
    }
    .hero-title {
      font-size: 44px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -1px;
      margin-bottom: 20px;
    }
    .hero-subtitle {
      font-size: 17px;
      line-height: 1.7;
      color: var(--text-muted);
      margin-bottom: 36px;
      padding: 0 16px;
    }
    .hero-btn-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 54px;
    }
    .btn-hero-main {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 600;
      color: #ffffff !important;
      background: var(--holo-grad);
      border-radius: 999px;
      box-shadow: var(--holo-glow);
      border: 1px solid rgba(255, 255, 255, 0.3);
      transition: all 0.3s ease;
    }
    .btn-hero-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 15px 30px rgba(79, 172, 254, 0.4);
    }
    .btn-hero-outline {
      padding: 14px 28px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      background: var(--bg-surface);
      border-radius: 999px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .btn-hero-outline:hover {
      border-color: #cbd5e1;
      background: #f1f5f9;
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      text-align: left;
    }
    .stat-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      position: relative;
      overflow: hidden;
    }
    .stat-card::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--holo-grad);
      opacity: 0.8;
    }
    .stat-card h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .stat-card p {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* Section Global */
    section {
      padding: 64px 0;
    }
    .section-header {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 48px;
    }
    .section-eyebrow {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: #0284c7;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* General Cards */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .card-holo {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .card-holo:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(79, 172, 254, 0.4);
    }
    .card-icon {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: rgba(79, 172, 254, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      color: #0284c7;
      font-weight: 700;
    }
    .card-holo h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .card-holo p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Model Cloud */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 16px 0;
    }
    .tag-pill {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-muted);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }
    .tag-pill:hover {
      border-color: var(--holo-blue);
      color: var(--text-main);
      transform: scale(1.04);
    }

    /* Table */
    .table-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }
    .custom-table th {
      background: #f8fafc;
      padding: 16px;
      font-weight: 700;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table td {
      padding: 16px;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table tr:last-child td {
      border-bottom: none;
    }
    .badge-highlight {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(79, 172, 254, 0.12);
      color: #0284c7;
      font-weight: 600;
      font-size: 12px;
    }

    /* Review Grid */
    .review-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0f2fe 0%, #ede9fe 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #0369a1;
      font-size: 14px;
    }
    .review-meta h4 {
      font-size: 15px;
      color: var(--text-main);
      font-weight: 600;
    }
    .review-meta span {
      font-size: 12px;
      color: var(--text-sub);
    }
    .review-content {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 22px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      transition: background 0.2s ease;
    }
    .faq-question:hover {
      background: #f8fafc;
    }
    .faq-icon {
      font-size: 18px;
      color: var(--text-sub);
      transition: transform 0.3s ease;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
      padding-bottom: 18px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: #0284c7;
    }

    /* Material Showcase (Middle Sections Only) */
    .showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      align-items: center;
      margin-top: 32px;
    }
    .img-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #fff;
    }
    .img-wrap img {
      width: 100%;
      height: auto;
      object-fit: contain;
    }

    /* Form Section */
    .form-box {
      max-width: 640px;
      margin: 0 auto;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-lg);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      outline: none;
      transition: all 0.2s ease;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      background: #fff;
      border-color: #0284c7;
      box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.2);
    }
    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      background: var(--holo-grad);
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: var(--holo-glow);
      transition: all 0.25s ease;
    }
    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(79, 172, 254, 0.4);
    }

    /* Footer */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 56px 0 28px;
      color: var(--text-muted);
      font-size: 13.5px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 12px;
      font-weight: 700;
    }
    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      font-size: 15px;
      color: var(--text-main);
      margin-bottom: 14px;
      font-weight: 600;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-col ul li a {
      color: var(--text-sub);
    }
    .footer-col ul li a:hover {
      color: #0284c7;
    }
    .footer-qr-card {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }
    .footer-qr-card img {
      width: 105px;
      height: 105px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      padding: 4px;
      background: #fff;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: var(--text-sub);
    }
    .footer-links-inline {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }
    .footer-links-inline a {
      color: var(--text-sub);
    }
    .footer-links-inline a:hover {
      color: var(--text-main);
    }

    /* Floating Widget */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 990;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      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);
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: #f8fafc;
      transform: scale(1.08);
      color: #0284c7;
    }

    /* Responsive */
    @media (max-width: 992px) {
      .grid-4, .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .showcase-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 28px;
      }
      .hero-stats-grid, .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .mobile-menu-btn {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-btn-group {
        flex-direction: column;
        width: 100%;
      }
      .btn-hero-main, .btn-hero-outline {
        width: 100%;
        text-align: center;
      }
    }