:root {
      --bg-main: #f8fafc;
      --bg-surface: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --primary: #0284c7;
      --primary-neon: #00d2ff;
      --accent-neon: #10b981;
      --accent-purple: #8b5cf6;
      --border-color: #e2e8f0;
      --border-glow: rgba(0, 210, 255, 0.35);
      --card-shadow: 0 10px 25px -5px rgba(2, 132, 199, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    body {
      background: radial-gradient(circle at 10% 0%, rgba(0, 210, 255, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 90% 20%, rgba(139, 92, 246, 0.07) 0%, transparent 45%),
                  radial-gradient(circle at 50% 80%, rgba(16, 185, 129, 0.06) 0%, transparent 50%),
                  var(--bg-main);
      min-height: 100vh;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo-wrap {
      max-width: 130px;
      height: auto;
      display: flex;
      align-items: center;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      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-muted);
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      transition: color 0.25s ease, text-shadow 0.25s ease;
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      text-shadow: 0 0 10px rgba(0, 210, 255, 0.4);
    }

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

    .btn-nav-primary {
      background: linear-gradient(135deg, #0284c7, #0ea5e9);
      color: #ffffff;
      padding: 9px 18px;
      border-radius: 30px;
      text-decoration: none;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.25);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(0, 210, 255, 0.45);
    }

    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      font-size: 18px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏纯文字与几何科技感 Hero (无图片) */
    .hero-section {
      padding: 70px 0 50px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #e0f2fe;
      border: 1px solid #bae6fd;
      color: #0369a1;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(0, 210, 255, 0.2);
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #0284c7;
      box-shadow: 0 0 8px #00d2ff;
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 17px;
      line-height: 1.7;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 32px;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn-main-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #0284c7, #2563eb);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 30px;
      text-decoration: none;
      box-shadow: 0 8px 20px rgba(2, 132, 199, 0.35), 0 0 12px rgba(0, 210, 255, 0.4);
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-main-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(2, 132, 199, 0.45), 0 0 20px rgba(0, 210, 255, 0.6);
    }

    .btn-outline-glow {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: #0f172a;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 28px;
      border-radius: 30px;
      border: 1px solid #cbd5e1;
      text-decoration: none;
      box-shadow: 0 4px 10px rgba(0, 0, 0, 0.03);
      transition: all 0.2s ease;
    }

    .btn-outline-glow:hover {
      border-color: #0284c7;
      color: #0284c7;
      box-shadow: 0 0 12px rgba(0, 210, 255, 0.2);
    }

    /* 科技感指标矩阵卡片 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 10px;
    }

    .hero-stat-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      text-align: center;
      position: relative;
      box-shadow: var(--card-shadow);
      transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
    }

    .hero-stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      box-shadow: 0 12px 24px rgba(0, 210, 255, 0.15);
    }

    .stat-number {
      font-size: 26px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 通用Section布局 */
    .section-block {
      padding: 60px 0;
      border-top: 1px solid rgba(226, 232, 240, 0.6);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 40px;
    }

    .section-tag {
      font-size: 12px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1.2px;
      color: var(--primary);
      background: #f0f9ff;
      border: 1px solid #e0f2fe;
      padding: 4px 12px;
      border-radius: 20px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.3px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵徽章墙 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }

    .model-tag {
      padding: 6px 14px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 8px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }

    .model-tag:hover {
      background: #e0f2fe;
      border-color: #0284c7;
      color: #0284c7;
      transform: translateY(-2px);
      box-shadow: 0 4px 10px rgba(0, 210, 255, 0.2);
    }

    /* 服务与场景卡片网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--border-glow);
      box-shadow: 0 14px 28px rgba(0, 210, 255, 0.15);
    }

    .card-icon-bar {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: linear-gradient(135deg, #e0f2fe, #f0fdf4);
      border: 1px solid #bae6fd;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .card-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 带有真实配图的展示区 */
    .media-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .media-card-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }

    .media-card-img-wrap.square {
      aspect-ratio: 1 / 1;
      max-height: 240px;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.04);
    }

    .media-card-body {
      padding: 20px;
      flex-grow: 1;
    }

    /* 对比评测表格与卡片 */
    .rating-highlight-box {
      background: linear-gradient(135deg, #ffffff, #f0fdf4);
      border: 2px solid #86efac;
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      box-shadow: 0 10px 30px rgba(16, 185, 129, 0.12);
    }

    .rating-score-num {
      font-size: 48px;
      font-weight: 900;
      color: #059669;
      line-height: 1;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 22px;
      letter-spacing: 2px;
      margin-top: 4px;
    }

    .rating-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 650px;
    }

    .compare-table-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--card-shadow);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
      min-width: 680px;
    }

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

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

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table .brand-col {
      background: rgba(2, 132, 199, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

    /* 流程步骤 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      position: relative;
    }

    .step-num {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary-neon);
      opacity: 0.8;
      margin-bottom: 8px;
      line-height: 1;
    }

    /* 用户评论网格 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .review-user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-user-role {
      font-size: 12px;
      color: var(--text-sub);
    }

    .review-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .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);
      transition: border-color 0.2s;
    }

    .faq-item.active {
      border-color: var(--primary);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 22px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }

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

    /* 需求表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 30px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--card-shadow);
    }

    .contact-info-side {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-detail-row {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .contact-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-sub);
    }

    .contact-val {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
    }

    .qr-container {
      margin-top: 10px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .qr-box {
      width: 140px;
      height: 140px;
      padding: 6px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    .qr-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }

    .form-side {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      outline: none;
      transition: border-color 0.2s, background-color 0.2s, box-shadow 0.2s;
    }

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

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .btn-submit {
      background: linear-gradient(135deg, #0284c7, #2563eb);
      color: #ffffff;
      border: none;
      padding: 13px 20px;
      font-size: 15px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(0, 210, 255, 0.45);
    }

    /* 行业资讯文章列表 */
    .article-list-wrap {
      display: flex;
      flex-direction: column;
      gap: 12px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--card-shadow);
    }

    .article-link-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      transition: background-color 0.2s, color 0.2s;
      border-bottom: 1px solid #f1f5f9;
    }

    .article-link-row:last-child {
      border-bottom: none;
    }

    .article-link-row:hover {
      background: #f0f9ff;
      color: var(--primary);
    }

    .article-title-text {
      font-size: 14px;
      font-weight: 600;
    }

    .article-tag {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 友情链接与页脚 */
    .friend-links-box {
      margin-top: 30px;
      padding: 16px 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      font-size: 13px;
    }

    .friend-links-title {
      font-weight: 700;
      color: var(--text-muted);
    }

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

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

    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 30px 0;
      margin-top: 60px;
      text-align: center;
      color: var(--text-sub);
      font-size: 13px;
    }

    .footer-nav {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 14px;
    }

    .footer-nav a {
      color: var(--text-muted);
      text-decoration: none;
      font-weight: 500;
    }

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

    /* 浮动客服挂件 */
    .floating-kefu-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      border: 1px solid var(--border-glow);
      border-radius: 30px;
      box-shadow: 0 8px 24px rgba(2, 132, 199, 0.25);
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
      text-decoration: none;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .floating-kefu-widget:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 28px rgba(0, 210, 255, 0.4);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 28px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        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%;
        text-align: center;
      }
      .nav-actions {
        display: none;
      }
      .grid-3, .grid-2, .grid-4 {
        grid-template-columns: 1fr;
      }
      .workflow-steps {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .rating-highlight-box {
        flex-direction: column;
        align-items: flex-start;
      }
    }