:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --primary-light: #eff6ff;
      --accent: #f97316;
      --accent-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-sub: #475569;
      --text-muted: #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, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
      --radius: 12px;
      --max-w: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: var(--max-w);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
    }

    .btn-accent {
      background: linear-gradient(135deg, #ff6b00 0%, #ff8c00 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 107, 0, 0.35);
    }
    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 107, 0, 0.45);
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main);
      border-color: var(--border-color);
    }
    .btn-outline:hover {
      background: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary);
    }

    .section-title {
      text-align: center;
      margin-bottom: 40px;
    }
    .section-title h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .section-title p {
      font-size: 16px;
      color: var(--text-muted);
      margin-top: 10px;
      max-width: 680px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-padding {
      padding-top: 70px;
      padding-bottom: 70px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-box img {
      max-height: 40px;
      width: auto;
    }
    .brand-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.3px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-sub);
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s, background-color 0.2s;
    }
    .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;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero 无图片纯技术质感 */
    .hero-section {
      background: radial-gradient(circle at 50% 0%, #e0f2fe 0%, #f8fafc 70%);
      padding-top: 80px;
      padding-bottom: 70px;
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 9999px;
      background: #e0e7ff;
      color: #3730a3;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      border: 1px solid #c7d2fe;
    }
    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #4f46e5;
      animation: pulse 2s infinite;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }
    .hero-title span {
      background: linear-gradient(135deg, #1d4ed8 0%, #0284c7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 18px;
      color: var(--text-sub);
      max-width: 780px;
      margin: 0 auto 32px;
      line-height: 1.6;
    }
    .hero-btn-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .hero-btn-group .btn {
      min-width: 170px;
      padding: 14px 28px;
      font-size: 16px;
    }

    /* 首屏数据网格卡片（非图片） */
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 1040px;
      margin: 0 auto;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .metric-card .num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .metric-card .label {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }
    .metric-card .subtext {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 品牌模型支持标尺墙 */
    .models-stream {
      background: #ffffff;
      padding: 24px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .stream-title {
      text-align: center;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 16px;
    }
    .models-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }
    .model-tag {
      background: #f1f5f9;
      color: #334155;
      font-size: 12px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: #e2e8f0;
      border-color: #cbd5e1;
      color: var(--primary);
    }

    /* 平台核心能力网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card-feature {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.3s;
      position: relative;
    }
    .card-feature:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-5px);
      border-color: #bfdbfe;
    }
    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .card-feature h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .card-feature p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 视觉素材矩阵 (首屏后安全载入真实图片资源) */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 30px;
    }
    .media-card {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-card .img-box {
      width: 100%;
      background: #e2e8f0;
    }
    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover img {
      transform: scale(1.02);
    }
    .media-card-body {
      padding: 20px;
    }
    .media-card-body h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .media-card-body p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-top: 24px;
    }
    .gallery-item {
      border-radius: 8px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #fff;
    }
    .gallery-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 流程步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
    }
    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
    }
    .score-summary-bar {
      padding: 24px;
      background: linear-gradient(90deg, #f0fdf4 0%, #e0f2fe 100%);
      border-bottom: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-item {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .stars-badge {
      color: #eab308;
      font-size: 20px;
      letter-spacing: 2px;
    }
    .score-tag {
      font-size: 28px;
      font-weight: 900;
      color: #047857;
    }
    .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 #f1f5f9;
      font-size: 14px;
    }
    .compare-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:hover td {
      background: #fafafa;
    }
    .compare-table .highlight {
      background: #f8fafc;
      font-weight: 700;
      color: var(--primary);
    }
    .tag-check {
      color: #10b981;
      font-weight: 700;
    }
    .tag-cross {
      color: #94a3b8;
    }

    /* 需求匹配与表单 */
    .demand-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: start;
    }
    .form-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
      background: #ffffff;
      color: var(--text-main);
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 客户评价 6 条网格 */
    .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);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .avatar-char {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }
    .reviewer-meta h4 {
      font-size: 15px;
      font-weight: 700;
    }
    .reviewer-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-body {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* FAQ 折叠面板 (不少于 10 条) */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: all 0.25s;
    }
    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      user-select: none;
    }
    .faq-question:hover {
      background-color: #fafbfc;
    }
    .faq-icon {
      font-size: 18px;
      transition: transform 0.25s ease;
      color: var(--text-muted);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #ffffff;
      color: var(--text-sub);
      font-size: 14px;
      line-height: 1.7;
      padding: 0 22px;
    }
    .faq-item.active {
      border-color: #bfdbfe;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }
    .faq-item.active .faq-answer {
      padding: 0 22px 18px;
      max-height: 300px;
    }

    /* 文章列表区域 */
    .articles-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .article-post-card {
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 18px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: all 0.2s;
    }
    .article-post-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
      transform: translateX(4px);
    }
    .article-post-card a {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }
    .article-post-card a:hover {
      color: var(--primary);
    }

    /* 招商加盟代理卡片 */
    .agent-banner {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .agent-content h3 {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 10px;
    }
    .agent-content p {
      font-size: 15px;
      color: #94a3b8;
      max-width: 600px;
    }

    /* 友情链接与页脚 */
    footer.site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding-top: 60px;
      padding-bottom: 30px;
      font-size: 14px;
      border-top: 1px solid #1e293b;
    }
    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: #94a3b8;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: #ffffff;
    }
    .footer-qrcode-wrap {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-qrcode-wrap img {
      width: 110px;
      height: 110px;
      border-radius: 8px;
      background: #ffffff;
      padding: 4px;
      display: block;
    }
    .footer-links-bar {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      padding-bottom: 24px;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }
    .footer-links-bar span {
      color: #e2e8f0;
      font-weight: 600;
    }
    .footer-links-bar a {
      color: #94a3b8;
      margin-right: 14px;
    }
    .footer-links-bar a:hover {
      color: #38bdf8;
    }
    .footer-bottom-bar {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    /* 浮动侧栏与客服挂件 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 20px;
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: all 0.2s;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    @keyframes pulse {
      0% { opacity: 0.6; transform: scale(0.95); }
      50% { opacity: 1; transform: scale(1.1); }
      100% { opacity: 0.6; transform: scale(0.95); }
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .steps-wrapper { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top-grid { grid-template-columns: repeat(2, 1fr); }
      .media-showcase-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active { display: flex; }
      .hero-title { font-size: 28px; }
      .hero-desc { font-size: 15px; }
      .hero-metrics { grid-template-columns: 1fr; }
      .grid-3 { grid-template-columns: 1fr; }
      .demand-section-wrap { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .steps-wrapper { grid-template-columns: 1fr; }
      .articles-grid { grid-template-columns: 1fr; }
      .footer-top-grid { grid-template-columns: 1fr; }
      .banner-gallery { grid-template-columns: 1fr; }
      .agent-banner { padding: 24px; text-align: center; }
      .agent-banner .btn { width: 100%; }
    }