:root {
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --primary-light: #e0f2fe;
      --secondary: #0d9488;
      --accent: #f59e0b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --radius: 12px;
      --transition: all 0.25s ease;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      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;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
    }

    .brand-logo img {
      max-height: 42px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 10px 14px;
      border-radius: 6px;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 6px 14px rgba(2, 132, 199, 0.35);
    }

    .btn-secondary {
      background-color: #ffffff;
      color: var(--primary);
      border-color: var(--border-color);
    }

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

    .btn-accent {
      background-color: #ff5722;
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(255, 87, 34, 0.25);
    }

    .btn-accent:hover {
      background-color: #f4511e;
      transform: translateY(-1px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 区域通用样式 */
    section.page-section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 48px auto;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏纯代码无图设计 */
    .hero-section {
      padding: 90px 0 80px 0;
      background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f8fafc 100%);
      position: relative;
      border-bottom: 1px solid #bae6fd;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-content {
      text-align: left;
    }

    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: 30px;
      border: 1px solid #cbd5e1;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-wrap .badge-pulse {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: 40px;
      font-weight: 800;
      line-height: 1.25;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 18px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 32px;
    }

    .hero-buttons {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }

    .hero-btn-main {
      padding: 14px 32px;
      font-size: 17px;
      font-weight: 700;
      border-radius: 10px;
    }

    .hero-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      padding-top: 24px;
      border-top: 1px solid rgba(2, 132, 199, 0.15);
    }

    .hero-highlight-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: #1e293b;
    }

    .hero-highlight-item svg {
      width: 18px;
      height: 18px;
      fill: var(--primary);
    }

    /* 首屏纯CSS数据科技看板 (无图片) */
    .hero-dashboard-card {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid #bfdbfe;
      box-shadow: 0 20px 25px -5px rgba(2, 132, 199, 0.1), 0 8px 10px -6px rgba(2, 132, 199, 0.05);
      padding: 28px;
      position: relative;
    }

    .dash-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid #e2e8f0;
      padding-bottom: 16px;
      margin-bottom: 20px;
    }

    .dash-dots {
      display: flex;
      gap: 6px;
    }

    .dash-dots span {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dash-dots span:nth-child(1) { background: #ef4444; }
    .dash-dots span:nth-child(2) { background: #f59e0b; }
    .dash-dots span:nth-child(3) { background: #10b981; }

    .dash-status {
      font-size: 13px;
      font-weight: 600;
      color: var(--secondary);
      background: #ccfbf1;
      padding: 3px 10px;
      border-radius: 12px;
    }

    .dash-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 20px;
    }

    .dash-metric {
      background: #f8fafc;
      padding: 16px;
      border-radius: 10px;
      border: 1px solid #e2e8f0;
    }

    .metric-name {
      font-size: 13px;
      color: var(--text-light);
      margin-bottom: 6px;
    }

    .metric-value {
      font-size: 24px;
      font-weight: 700;
      color: #0f172a;
    }

    .metric-trend {
      font-size: 12px;
      color: #059669;
      margin-top: 4px;
      font-weight: 500;
    }

    .dash-terminal {
      background: #0f172a;
      color: #38bdf8;
      padding: 16px;
      border-radius: 10px;
      font-family: monospace;
      font-size: 13px;
      line-height: 1.5;
    }

    .dash-terminal .term-dim {
      color: #94a3b8;
    }

    .dash-terminal .term-ok {
      color: #4ade80;
    }

    /* 平台能力与模型聚合标签 */
    .model-tags-wrapper {
      padding: 24px;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 30px;
    }

    .model-tags-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .model-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-tag {
      padding: 6px 12px;
      background: #f1f5f9;
      color: #334155;
      font-size: 13px;
      font-weight: 500;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary-light);
      color: var(--primary);
      border-color: #93c5fd;
    }

    /* 功能卡片网格 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fill, min-max(300px, 1fr));
      gap: 24px;
    }

    .grid-cards-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #93c5fd;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }

    .card-icon svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* 图文混排区块 */
    .media-block {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-top: 40px;
    }

    .media-container {
      width: 100%;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #e2e8f0;
    }

    .media-container img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    /* 流程步骤 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
      text-align: center;
    }

    .step-number {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px auto;
      box-shadow: 0 4px 8px rgba(2, 132, 199, 0.3);
    }

    .step-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 对比评测表格与评测卡片 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #0284c7 0%, #0369a1 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 32px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      box-shadow: var(--shadow-lg);
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-score-circle {
      width: 90px;
      height: 90px;
      border-radius: 50%;
      background: #ffffff;
      color: #0284c7;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    }

    .score-val {
      font-size: 30px;
      line-height: 1;
    }

    .score-max {
      font-size: 12px;
      color: #64748b;
    }

    .eval-rating-info h3 {
      font-size: 24px;
      margin-bottom: 6px;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 18px;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .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: #f0f9ff;
      font-weight: 600;
      color: var(--primary);
    }

    .badge-check {
      color: #059669;
      font-weight: 700;
    }

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

    /* 用户评论卡片 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 14px;
      color: #334155;
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

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

    .author-role {
      font-size: 13px;
      color: var(--text-light);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      background-color: #f8fafc;
    }

    .faq-icon {
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafafa;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      padding: 16px 24px 20px 24px;
      max-height: 300px;
      border-top: 1px solid #f1f5f9;
    }

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

    /* 表单模块 */
    .form-wrapper {
      max-width: 760px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      outline: none;
      transition: var(--transition);
      background-color: #fcfdfe;
      color: var(--text-main);
    }

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

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    /* 资讯与百科 */
    .article-link-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 16px;
      margin-top: 24px;
    }

    .article-item-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }

    .article-item-card:hover {
      border-color: var(--primary);
      background: var(--primary-light);
      transform: translateX(4px);
    }

    .article-item-card span {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 代理加盟政策 */
    .agent-box {
      background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
      border: 1px solid #86efac;
      border-radius: var(--radius);
      padding: 36px;
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .agent-info h3 {
      font-size: 26px;
      font-weight: 700;
      color: #166534;
      margin-bottom: 12px;
    }

    .agent-info p {
      font-size: 15px;
      color: #14532d;
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .agent-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .agent-feat-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      color: #15803d;
    }

    /* 页脚与友情链接 */
    footer.site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px 0;
      border-top: 1px solid #1e293b;
    }

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

    .footer-brand h4 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 18px;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #94a3b8;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: #ffffff;
    }

    .footer-contact-item {
      font-size: 14px;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: #cbd5e1;
    }

    .footer-qrcode {
      display: inline-block;
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      margin-top: 10px;
      width: 100px;
      height: 100px;
    }

    .footer-qrcode img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-wrap a {
      color: #64748b;
      transition: var(--transition);
    }

    .friend-links-wrap a:hover {
      color: #38bdf8;
    }

    /* 浮动客服入口与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: var(--transition);
      color: var(--primary);
    }

    .float-btn:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
      background: var(--primary);
      color: #ffffff;
    }

    .float-btn svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }

    /* 响应式断点适配 */
    @media (max-width: 1024px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .grid-cards-3, .grid-cards-4, .reviews-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .media-block, .agent-box {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        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);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 12px 16px;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .grid-cards-3, .grid-cards-4, .reviews-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        text-align: center;
      }
      .eval-score-wrap {
        flex-direction: column;
      }
    }