:root {
      --primary: #FF5500;
      --primary-dark: #E04400;
      --primary-light: #FFF0E8;
      --secondary: #FF8C00;
      --text-main: #1D2129;
      --text-muted: #4E5969;
      --bg-light: #F7F8FA;
      --bg-white: #FFFFFF;
      --border-color: #E5E6EB;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 6px 16px rgba(255, 85, 0, 0.08);
      --shadow-lg: 0 12px 32px rgba(255, 85, 0, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      z-index: 1000;
      transition: all 0.3s;
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 1.25rem;
      color: var(--text-main);
    }
    .brand-logo img {
      height: 40px;
      width: auto;
      display: block;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      transition: color 0.2s ease;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.95rem;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      box-shadow: 0 4px 12px rgba(255, 85, 0, 0.25);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(255, 85, 0, 0.35);
      color: #fff;
    }
    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: #fff;
    }
    .btn-outline:hover {
      background: var(--primary-light);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero */
    .hero-section {
      background: linear-gradient(180deg, #FFF6F0 0%, #FFFFFF 100%);
      padding: 70px 0 60px;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: #FFE8DC;
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 24px;
      border: 1px solid rgba(255, 85, 0, 0.2);
    }
    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.25;
      color: #111;
      margin-bottom: 18px;
    }
    .hero-title span {
      color: var(--primary);
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 32px;
      line-height: 1.6;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .hero-features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      text-align: left;
    }
    .hero-feat-card {
      background: #FFFFFF;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .hero-feat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255, 85, 0, 0.3);
    }
    .hero-feat-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-feat-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 区域通用规范 */
    .section-padding {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }
    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 数据指标卡片 */
    .stats-bar {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }
    .stat-item h3 {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 服务场景网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }
    .service-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }
    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 平台支持模型标签 */
    .models-banner {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-top: 40px;
    }
    .models-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }
    .model-tag {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: #333;
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary-dark);
    }

    /* 图文与横幅区域 */
    .banner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 30px;
    }
    .banner-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .banner-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      display: block;
    }
    .banner-content {
      padding: 20px;
    }
    .banner-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .banner-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测表格 */
    .eval-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }
    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .score-num {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }
    .score-stars {
      color: #FFB800;
      font-size: 1.2rem;
    }
    .table-container {
      overflow-x: auto;
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .custom-table th, .custom-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }
    .custom-table th {
      background: var(--bg-light);
      font-weight: 700;
      color: var(--text-main);
    }
    .highlight-col {
      background: #FFF8F4;
      font-weight: 600;
      color: var(--primary-dark);
    }

    /* 流程步骤 */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .step-box {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-num {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 12px;
      line-height: 1;
    }
    .step-box h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 客户评价网格 */
    .review-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--bg-light);
      padding-top: 12px;
    }
    .reviewer-info h5 {
      font-size: 0.95rem;
      font-weight: 700;
    }
    .reviewer-info span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 常见问题 Accordion */
    .faq-list {
      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;
      transition: all 0.2s;
    }
    .faq-header {
      padding: 18px 24px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-header:hover {
      background: #FAFAFA;
      color: var(--primary);
    }
    .faq-body {
      padding: 0 24px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }
    .faq-icon {
      transition: transform 0.2s;
      font-size: 0.85rem;
    }

    /* 文章与资讯列表 */
    .article-links-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 20px;
    }
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 12px;
    }
    .article-list li a {
      color: var(--text-main);
      font-size: 0.92rem;
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: 4px;
      background: var(--bg-light);
      transition: all 0.2s;
    }
    .article-list li a:hover {
      background: var(--primary-light);
      color: var(--primary-dark);
    }

    /* 表单与转化区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }
    .contact-info {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-methods {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin: 24px 0;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
    }
    .contact-item strong {
      min-width: 80px;
      color: var(--text-main);
    }
    .qr-box {
      display: flex;
      align-items: center;
      gap: 16px;
      background: var(--bg-light);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }
    .qr-box img {
      width: 100px;
      height: 100px;
      border-radius: 4px;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.1);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* 页脚与友情链接 */
    .site-footer {
      background: #1D2129;
      color: #86909C;
      padding: 50px 0 30px;
      border-top: 1px solid #2E3440;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .footer-brand h4 {
      color: #FFF;
      font-size: 1.25rem;
      margin-bottom: 12px;
    }
    .footer-col h5 {
      color: #FFF;
      font-size: 1rem;
      margin-bottom: 16px;
      font-weight: 600;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #86909C;
      font-size: 0.9rem;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #FFF;
    }
    .friend-links {
      border-top: 1px solid #2E3440;
      padding: 24px 0;
      margin-top: 20px;
    }
    .friend-links-title {
      font-size: 0.9rem;
      color: #FFF;
      margin-bottom: 12px;
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .friend-links-list a {
      color: #86909C;
      font-size: 0.85rem;
      transition: color 0.2s;
    }
    .friend-links-list a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid #2E3440;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #6B7785;
    }

    /* 浮动组件与交互 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }
    .float-btn {
      width: 44px;
      height: 44px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      box-shadow: var(--shadow-md);
      cursor: pointer;
      transition: all 0.2s;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #FFF;
      border-color: var(--primary);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .banner-grid {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 8px 16px rgba(0,0,0,0.1);
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 8px;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .header-actions {
        width: 100%;
        justify-content: center;
        margin-top: 16px;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }