:root {
      --bg-base: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --primary: #0284c7;
      --primary-glow: #06b6d4;
      --neon-cyan: #00f0ff;
      --neon-violet: #8b5cf6;
      --neon-emerald: #10b981;
      --neon-amber: #f59e0b;
      --neon-gradient: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #8b5cf6 100%);
      --card-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --card-glow-hover: 0 20px 30px -10px rgba(6, 182, 212, 0.2), 0 0 15px 1px rgba(2, 132, 199, 0.15);
      --container-width: 1200px;
      --radius-lg: 16px;
      --radius-md: 10px;
    }

    * {
      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-base);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.05) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%),
                  var(--bg-base);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.03);
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-box img.ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: -0.5px;
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
    }

    .nav-links li a:hover,
    .nav-links li a.ai-page-home-link {
      color: var(--primary);
      background: rgba(2, 132, 199, 0.06);
    }

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

    .btn-neon-action {
      background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
      color: #ffffff;
      padding: 10px 20px;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 9999px;
      border: 1px solid rgba(255, 255, 255, 0.3);
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-neon-action:hover {
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.55);
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: 8px;
      cursor: pointer;
      font-size: 1rem;
      color: var(--text-main);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(6, 182, 212, 0.1);
      border: 1px solid rgba(6, 182, 212, 0.3);
      border-radius: 9999px;
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      max-width: 900px;
      margin: 0 auto 20px;
      letter-spacing: -1px;
    }

    .hero-title .highlight {
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      position: relative;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-primary {
      background: linear-gradient(135deg, #0284c7 0%, #8b5cf6 100%);
      color: #ffffff;
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 9999px;
      border: 1px solid rgba(255, 255, 255, 0.4);
      box-shadow: 0 10px 25px rgba(2, 132, 199, 0.3);
      display: inline-block;
    }

    .btn-hero-primary:hover {
      box-shadow: 0 15px 30px rgba(139, 92, 246, 0.45);
      transform: translateY(-2px);
    }

    .btn-hero-secondary {
      background: #ffffff;
      color: var(--text-main);
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 9999px;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: inline-block;
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 纯CSS首屏科技展示卡 */
    .hero-stats-panel {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      position: relative;
    }

    .hero-stat-item {
      text-align: center;
      padding: 10px;
    }

    .hero-stat-item .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: monospace, sans-serif;
    }

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

    /* 统一 Section 样式 */
    section {
      padding: 70px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-header .tagline {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      margin-bottom: 8px;
      display: inline-block;
    }

    .section-header h2 {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* 卡片网格通用 */
    .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: 30px;
    }

    /* 炫彩荧光卡片基础 */
    .glow-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .glow-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-glow-hover);
      border-color: rgba(6, 182, 212, 0.4);
    }

    .glow-card .card-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(2, 132, 199, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.5rem;
      margin-bottom: 20px;
      border: 1px solid rgba(2, 132, 199, 0.2);
    }

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

    .glow-card p {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 场景分类标签集 */
    .model-badge-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 30px;
      justify-content: center;
    }

    .model-badge {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.03);
    }

    .model-badge:hover {
      border-color: var(--primary-glow);
      color: var(--primary);
      box-shadow: 0 0 10px rgba(6, 182, 212, 0.2);
    }

    /* 评测卡与评分 */
    .evaluation-score-card {
      background: linear-gradient(135deg, #ffffff 0%, #f0fdfa 100%);
      border: 2px solid rgba(6, 182, 212, 0.3);
      border-radius: var(--radius-lg);
      padding: 32px;
      text-align: center;
      margin-bottom: 36px;
      box-shadow: var(--card-shadow);
    }

    .score-badge-highlight {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
      font-family: monospace, sans-serif;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      letter-spacing: 4px;
      margin-bottom: 8px;
    }

    /* 表格容器 */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
    }

    table.comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    table.comparison-table th,
    table.comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

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

    table.comparison-table tr:hover td {
      background: rgba(2, 132, 199, 0.02);
    }

    .status-check {
      color: #10b981;
      font-weight: 700;
    }

    .status-cross {
      color: #94a3b8;
    }

    /* FAQ 折叠项 */
    .faq-list {
      max-width: 880px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.02rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      color: var(--text-main);
    }

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

    .faq-toggle-icon {
      font-size: 1.2rem;
      color: var(--text-light);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid rgba(226, 232, 240, 0.5);
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* 客户评论卡片 */
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

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

    .reviewer-details p {
      font-size: 0.82rem;
      color: var(--text-light);
    }

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

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }

    select.form-control {
      background-color: #ffffff;
    }

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

    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, #0284c7 0%, #06b6d4 100%);
      color: #ffffff;
      padding: 14px;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-md);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
      transition: all 0.25s;
    }

    .btn-submit:hover {
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
      transform: translateY(-1px);
    }

    /* 案例展示画廊 */
    .media-card-wrap {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .media-img-container {
      width: 100%;
      background: #f1f5f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-img-container img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .media-info {
      padding: 20px;
    }

    .media-info h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .media-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 文章列表与友情链接 */
    .article-link-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-link-item a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 500;
    }

    .article-link-item a:hover {
      border-color: var(--primary);
      color: var(--primary);
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.08);
    }

    /* 友情链接容器 */
    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
    }

    .friend-links-box a {
      font-size: 0.88rem;
      color: var(--text-muted);
      padding: 6px 14px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: 6px;
    }

    .friend-links-box a:hover {
      color: var(--primary);
      border-color: var(--primary-glow);
    }

    /* 底部页脚 */
    footer.site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      margin-top: auto;
      border-top: 1px solid #1e293b;
    }

    .footer-content-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #f8fafc;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 10px;
    }

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

    .footer-col ul li a {
      color: #94a3b8;
      font-size: 0.9rem;
    }

    .footer-col ul li a:hover {
      color: var(--neon-cyan);
    }

    .qr-wrapper {
      display: inline-block;
      padding: 8px;
      background: #ffffff;
      border-radius: 8px;
      margin-top: 8px;
    }

    .qr-wrapper img {
      width: 90px;
      height: 90px;
      display: block;
    }

    .footer-bottom-bar {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 悬浮客服挂件 */
    .float-contact-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #06b6d4);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(2, 132, 199, 0.4);
      cursor: pointer;
      font-size: 1.3rem;
      position: relative;
    }

    .float-btn:hover {
      transform: scale(1.08);
    }

    .float-qr-popover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
    }

    .float-qr-popover img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }

    .float-qr-popover span {
      font-size: 0.75rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .float-btn:hover .float-qr-popover {
      display: block;
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-content-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-panel {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 2rem;
      }
      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }
      .footer-content-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats-panel {
        grid-template-columns: 1fr 1fr;
      }
    }