:root {
      --bg-main: #0b0f19;
      --bg-surface: #111827;
      --bg-card: rgba(17, 24, 39, 0.7);
      --bg-card-hover: rgba(31, 41, 55, 0.85);
      --neon-cyan: #00f0ff;
      --neon-pink: #ff007f;
      --neon-purple: #8b5cf6;
      --neon-green: #10b981;
      --text-main: #f3f4f6;
      --text-muted: #9ca3af;
      --text-dim: #6b7280;
      --border-glow: rgba(0, 240, 255, 0.25);
      --border-dim: rgba(255, 255, 255, 0.08);
      --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.35);
      --glow-pink: 0 0 15px rgba(255, 0, 127, 0.35);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      --container-max: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: var(--font-sans);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 15% 15%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 35%, rgba(0, 240, 255, 0.12) 0%, transparent 45%),
        radial-gradient(circle at 50% 80%, rgba(255, 0, 127, 0.08) 0%, transparent 50%);
      background-attachment: fixed;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-glow);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
      filter: drop-shadow(0 0 8px rgba(0,240,255,0.4));
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 0.5px;
      color: #ffffff;
      text-shadow: 0 0 10px rgba(0,240,255,0.6);
    }
    .brand-text span {
      color: var(--neon-cyan);
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links a {
      font-size: 0.92rem;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: 6px;
      font-weight: 500;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--neon-cyan);
      text-shadow: 0 0 8px rgba(0, 240, 255, 0.5);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-neon-cyan {
      background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(139, 92, 246, 0.25));
      border-color: var(--neon-cyan);
      color: #ffffff;
      box-shadow: var(--glow-cyan);
    }
    .btn-neon-cyan:hover {
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #0b0f19;
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-neon-pink {
      background: linear-gradient(135deg, rgba(255, 0, 127, 0.15), rgba(139, 92, 246, 0.25));
      border-color: var(--neon-pink);
      color: #ffffff;
      box-shadow: var(--glow-pink);
    }
    .btn-neon-pink:hover {
      background: linear-gradient(135deg, var(--neon-pink), #ff5e00);
      color: #ffffff;
      box-shadow: 0 0 25px rgba(255, 0, 127, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: var(--border-dim);
      background: rgba(255, 255, 255, 0.03);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      background: rgba(0, 240, 255, 0.08);
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      color: #ffffff;
      font-size: 1.5rem;
      cursor: pointer;
    }
    .hero-section {
      padding: 90px 0 70px;
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 240, 255, 0.08);
      border: 1px solid rgba(0, 240, 255, 0.3);
      color: var(--neon-cyan);
      font-size: 0.85rem;
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 24px;
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.2);
    }
    .hero-title {
      font-size: 2.8rem;
      line-height: 1.25;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title .highlight {
      color: var(--neon-cyan);
      text-shadow: 0 0 20px rgba(0, 240, 255, 0.6);
    }
    .hero-title .sub-highlight {
      color: var(--neon-pink);
      text-shadow: 0 0 20px rgba(255, 0, 127, 0.6);
    }
    .hero-desc {
      max-width: 820px;
      margin: 0 auto 36px;
      font-size: 1.12rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .hero-cta {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }
    .stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 12px;
      padding: 24px 16px;
      backdrop-filter: blur(8px);
      text-align: center;
      transition: all 0.3s ease;
    }
    .stat-card:hover {
      border-color: var(--neon-cyan);
      transform: translateY(-4px);
      box-shadow: 0 10px 25px rgba(0, 240, 255, 0.15);
    }
    .stat-value {
      font-size: 2.2rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 6px;
      background: linear-gradient(135deg, #ffffff 40%, var(--neon-cyan));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .section-spacing {
      padding: 70px 0;
      border-top: 1px solid var(--border-dim);
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      color: var(--neon-cyan);
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      margin-bottom: 10px;
      display: inline-block;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .card-neon {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 14px;
      padding: 28px;
      backdrop-filter: blur(8px);
      transition: all 0.3s ease;
      position: relative;
      overflow: hidden;
    }
    .card-neon:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 8px 30px rgba(0, 240, 255, 0.18);
      transform: translateY(-5px);
    }
    .card-icon {
      width: 48px;
      height: 48px;
      background: rgba(0, 240, 255, 0.1);
      border: 1px solid rgba(0, 240, 255, 0.3);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--neon-cyan);
      font-size: 1.3rem;
      margin-bottom: 18px;
    }
    .card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .card-tag-item {
      font-size: 0.75rem;
      padding: 4px 10px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 4px;
      color: #d1d5db;
    }
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }
    .model-chip {
      background: rgba(17, 24, 39, 0.85);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 0.86rem;
      color: #e5e7eb;
      transition: all 0.2s;
    }
    .model-chip:hover {
      border-color: var(--neon-cyan);
      color: var(--neon-cyan);
      box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
      transform: scale(1.05);
    }
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-item {
      position: relative;
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 12px;
      padding: 24px;
    }
    .step-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--neon-cyan);
      opacity: 0.8;
      margin-bottom: 12px;
    }
    .step-name {
      font-size: 1.1rem;
      color: #ffffff;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .table-wrap {
      width: 100%;
      overflow-x: auto;
      border-radius: 12px;
      border: 1px solid var(--border-dim);
      background: var(--bg-surface);
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }
    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .compare-table th {
      background: rgba(0, 240, 255, 0.06);
      color: #ffffff;
      font-weight: 600;
    }
    .compare-table tr:hover {
      background: rgba(255, 255, 255, 0.02);
    }
    .highlight-col {
      background: rgba(0, 240, 255, 0.03);
      color: var(--neon-cyan);
      font-weight: 600;
    }
    .score-badge-card {
      background: linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(255, 0, 127, 0.1));
      border: 1px solid var(--neon-cyan);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-left h4 {
      font-size: 1.3rem;
      color: #ffffff;
      margin-bottom: 6px;
    }
    .score-left p {
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .score-right {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-number {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--neon-cyan);
      text-shadow: 0 0 15px rgba(0,240,255,0.6);
    }
    .score-stars {
      color: #fbbf24;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }
    .faq-accordion {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 10px;
      overflow: hidden;
      transition: all 0.25s ease;
    }
    .faq-item.active {
      border-color: var(--neon-cyan);
      box-shadow: 0 4px 15px rgba(0, 240, 255, 0.1);
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 22px;
      background: transparent;
      border: none;
      color: #ffffff;
      font-size: 1.02rem;
      font-weight: 600;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-icon {
      font-size: 1.2rem;
      color: var(--neon-cyan);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-body {
      padding: 0 22px 18px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      display: none;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #ffffff;
      font-size: 1.1rem;
    }
    .review-user h5 {
      color: #ffffff;
      font-size: 1rem;
    }
    .review-user span {
      font-size: 0.78rem;
      color: var(--neon-cyan);
    }
    .review-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
      font-style: italic;
    }
    .review-rating {
      color: #fbbf24;
      font-size: 0.9rem;
    }
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }
    .media-box {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-dim);
      background: var(--bg-surface);
    }
    .media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-box:hover img {
      transform: scale(1.03);
    }
    .media-info {
      padding: 16px 20px;
    }
    .media-title {
      font-size: 1.05rem;
      color: #ffffff;
      font-weight: 600;
      margin-bottom: 4px;
    }
    .media-sub {
      font-size: 0.85rem;
      color: var(--text-muted);
    }
    .banner-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .banner-item {
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--border-dim);
    }
    .banner-item img {
      width: 100%;
      height: auto;
      display: block;
    }
    .articles-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }
    .article-item {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 10px;
      padding: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.25s ease;
    }
    .article-item:hover {
      border-color: var(--neon-cyan);
      transform: translateX(4px);
    }
    .article-title {
      font-size: 0.95rem;
      color: #ffffff;
      font-weight: 500;
    }
    .article-link {
      font-size: 0.82rem;
      color: var(--neon-cyan);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      white-space: nowrap;
      margin-left: 12px;
    }
    .form-container {
      max-width: 720px;
      margin: 0 auto;
      background: var(--bg-surface);
      border: 1px solid var(--border-glow);
      border-radius: 16px;
      padding: 36px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
      margin-bottom: 18px;
    }
    .form-group-full {
      grid-column: 1 / -1;
    }
    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 500;
      color: #e5e7eb;
      margin-bottom: 8px;
    }
    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      background: rgba(11, 15, 25, 0.8);
      border: 1px solid var(--border-dim);
      border-radius: 8px;
      color: #ffffff;
      font-size: 0.92rem;
      font-family: inherit;
      transition: all 0.2s;
    }
    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      outline: none;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
    }
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 40px;
    }
    .contact-card {
      background: var(--bg-card);
      border: 1px solid var(--border-dim);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
    }
    .contact-qr {
      width: 130px;
      height: 130px;
      margin: 0 auto 16px;
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid rgba(0, 240, 255, 0.3);
      padding: 4px;
      background: #ffffff;
    }
    .contact-qr img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .site-footer {
      background: #080c14;
      border-top: 1px solid var(--border-dim);
      padding: 50px 0 24px;
      font-size: 0.88rem;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      font-size: 1.25rem;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .footer-brand p {
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .footer-col h5 {
      color: #ffffff;
      font-size: 0.95rem;
      margin-bottom: 16px;
      letter-spacing: 0.5px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--neon-cyan);
    }
    .friendly-links-wrap {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 20px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      font-size: 0.84rem;
    }
    .friendly-links-wrap span {
      color: var(--neon-cyan);
      font-weight: 600;
    }
    .friendly-links-wrap a {
      color: var(--text-muted);
      margin-right: 12px;
    }
    .friendly-links-wrap a:hover {
      color: #ffffff;
      text-decoration: underline;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text-dim);
      font-size: 0.82rem;
      flex-wrap: wrap;
      gap: 12px;
    }
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 99;
    }
    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--bg-surface);
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
      transition: all 0.25s;
    }
    .float-btn:hover {
      background: var(--neon-cyan);
      color: #0b0f19;
      transform: scale(1.1);
    }
    @media (max-width: 992px) {
      .grid-4, .stats-row, .step-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .review-grid, .contact-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .banner-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }
    @media (max-width: 768px) {
      .nav-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-surface);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-glow);
      }
      .nav-links.open {
        display: flex;
      }
      .grid-3, .grid-4, .review-grid, .stats-row, .gallery-grid, .articles-list, .form-grid, .contact-grid, .banner-row, .step-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .hero-cta {
        flex-direction: column;
      }
      .btn {
        width: 100%;
      }
    }