/* CSS 变量定义 - 亮紫绚烂风（浅色底+紫色霓虹调） */
    :root {
      --primary: #7C3AED;
      --primary-light: #EEF2FF;
      --primary-gradient: linear-gradient(135deg, #7C3AED, #A78BFA, #EC4899);
      --dark: #1E1B4B;
      --text-main: #374151;
      --text-muted: #6B7280;
      --bg-main: #FFFFFF;
      --bg-alt: #FAF5FF;
      --bg-card: #FFFFFF;
      --border-color: #E9D5FF;
      --accent: #EC4899;
      --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.05);
      --shadow-md: 0 8px 24px rgba(124, 58, 237, 0.08);
      --shadow-lg: 0 16px 40px rgba(124, 58, 237, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans CJK SC", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-main);
    }

    body {
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* 通用容器与组件 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    .section-padding {
      padding: 80px 0;
    }

    .section-title {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-title h2 {
      font-size: 2.2rem;
      color: var(--dark);
      margin-bottom: 12px;
      font-weight: 800;
      position: relative;
      display: inline-block;
    }

    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background: var(--primary-gradient);
      border-radius: 2px;
    }

    .section-title p {
      color: var(--text-muted);
      font-size: 1.1rem;
      max-width: 600px;
      margin: 0 auto;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #FFFFFF;
      box-shadow: 0 4px 15px rgba(124, 58, 237, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(124, 58, 237, 0.4);
    }

    .btn-secondary {
      background: var(--primary-light);
      color: var(--primary);
      border: 1px solid var(--border-color);
    }

    .btn-secondary:hover {
      background: var(--border-color);
      transform: translateY(-2px);
    }

    /* 顶部导航 */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.9);
      backdrop-filter: blur(8px);
      box-shadow: var(--shadow-sm);
      border-bottom: 1px solid rgba(124, 58, 237, 0.1);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 70px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--dark);
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.95rem;
      font-weight: 500;
      transition: var(--transition);
    }

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

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

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
      background: none;
      border: none;
    }

    .menu-toggle span {
      width: 25px;
      height: 3px;
      background-color: var(--primary);
      border-radius: 2px;
      transition: var(--transition);
    }

    /* Hero 首屏 - 无图设计，纯科技质感配色 */
    .hero-section {
      background: radial-gradient(circle at 90% 10%, rgba(236, 72, 153, 0.08), transparent 40%),
                  radial-gradient(circle at 10% 90%, rgba(124, 58, 237, 0.08), transparent 40%),
                  var(--bg-alt);
      padding: 120px 0 80px 0;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      padding: 6px 16px;
      border-radius: 50px;
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-section h1 {
      font-size: 3rem;
      color: var(--dark);
      line-height: 1.25;
      font-weight: 800;
      max-width: 800px;
      margin: 0 auto 20px auto;
    }

    .hero-section h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.25rem;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto 35px auto;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
    }

    .hero-features {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-feat-card {
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid rgba(124, 58, 237, 0.15);
      border-radius: 12px;
      padding: 16px;
      backdrop-filter: blur(5px);
      box-shadow: var(--shadow-sm);
    }

    .hero-feat-card h4 {
      font-size: 1.1rem;
      color: var(--dark);
      margin-bottom: 4px;
    }

    .hero-feat-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 关于我们 + 术语百科 + 技术标准 */
    .about-section {
      background-color: var(--bg-main);
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.8rem;
      color: var(--dark);
      margin-bottom: 16px;
    }

    .about-text {
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .about-features {
      list-style: none;
    }

    .about-features li {
      margin-bottom: 12px;
      padding-left: 24px;
      position: relative;
    }

    .about-features li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--primary);
      font-weight: bold;
    }

    .terms-box {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
    }

    .terms-box h4 {
      font-size: 1.2rem;
      color: var(--dark);
      margin-bottom: 15px;
    }

    .term-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .term-item dt {
      font-weight: 700;
      color: var(--primary);
      font-size: 0.95rem;
    }

    .term-item dd {
      margin-left: 0;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 服务体系 & Token比价 */
    .service-section {
      background-color: var(--bg-alt);
    }

    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-bottom: 60px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid rgba(124, 58, 237, 0.1);
      border-radius: 16px;
      padding: 30px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .service-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-size: 1.5rem;
      font-weight: bold;
    }

    .service-card h3 {
      font-size: 1.3rem;
      color: var(--dark);
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .service-card ul {
      list-style: none;
      font-size: 0.85rem;
      color: var(--text-main);
    }

    .service-card ul li {
      margin-bottom: 6px;
      padding-left: 15px;
      position: relative;
    }

    .service-card ul li::before {
      content: '•';
      position: absolute;
      left: 0;
      color: var(--accent);
    }

    /* Token比价参考表格 */
    .token-price-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .token-price-box h3 {
      text-align: center;
      margin-bottom: 24px;
      color: var(--dark);
    }

    .table-responsive {
      overflow-x: auto;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    th, td {
      padding: 12px 16px;
      border-bottom: 1px solid var(--border-color);
    }

    th {
      background-color: var(--primary-light);
      color: var(--dark);
      font-weight: 700;
    }

    tr:hover {
      background-color: rgba(124, 58, 237, 0.02);
    }

    /* 制作流程 & 标准服务全流程 & 时间线 */
    .workflow-section {
      background-color: var(--bg-main);
    }

    .timeline {
      position: relative;
      max-width: 800px;
      margin: 0 auto;
      padding: 40px 0;
    }

    .timeline::before {
      content: '';
      position: absolute;
      left: 50%;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--border-color);
      transform: translateX(-50%);
    }

    .timeline-item {
      position: relative;
      width: 50%;
      padding: 20px 40px;
      box-sizing: border-box;
    }

    .timeline-item:nth-child(odd) {
      left: 0;
      text-align: right;
    }

    .timeline-item:nth-child(even) {
      left: 50%;
    }

    .timeline-badge {
      position: absolute;
      top: 25px;
      right: -15px;
      width: 30px;
      height: 30px;
      background: var(--primary);
      border: 4px solid var(--bg-main);
      border-radius: 50%;
      z-index: 10;
    }

    .timeline-item:nth-child(even) .timeline-badge {
      left: -15px;
    }

    .timeline-content {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      box-shadow: var(--shadow-sm);
    }

    .timeline-content h4 {
      color: var(--primary);
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    .timeline-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 解决方案 & 全国服务网络 & 标签云 */
    .solutions-section {
      background-color: var(--bg-alt);
    }

    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 24px;
      margin-bottom: 50px;
    }

    .solution-card {
      background: var(--bg-card);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(124, 58, 237, 0.05);
      transition: var(--transition);
    }

    .solution-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .solution-card h4 {
      font-size: 1.2rem;
      color: var(--dark);
      margin-bottom: 10px;
    }

    .solution-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .network-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      margin-top: 24px;
    }

    .tag-item {
      background: var(--primary-light);
      color: var(--primary);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 500;
      border: 1px solid rgba(124, 58, 237, 0.1);
    }

    /* 客户案例中心 (包含宣传图、横版/方版素材图) */
    .cases-section {
      background-color: var(--bg-main);
    }

    .cases-intro {
      max-width: 800px;
      margin: 0 auto 40px auto;
      text-align: center;
      color: var(--text-muted);
    }

    .cases-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 50px;
    }

    .cases-images {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .cases-images img {
      width: 100%;
      border-radius: 12px;
      box-shadow: var(--shadow-md);
      transition: var(--transition);
      object-fit: cover;
    }

    .cases-images img:hover {
      transform: scale(1.02);
    }

    .cases-assets {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 15px;
    }

    .cases-assets img {
      width: 100%;
      height: 180px;
      border-radius: 8px;
      object-fit: cover;
      box-shadow: var(--shadow-sm);
    }

    .cases-desc h3 {
      font-size: 1.8rem;
      color: var(--dark);
      margin-bottom: 20px;
      line-height: 1.4;
    }

    .cases-desc p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 1rem;
    }

    .case-stat {
      display: flex;
      gap: 30px;
      margin-top: 30px;
    }

    .stat-item h5 {
      font-size: 2rem;
      color: var(--primary);
      font-weight: 800;
    }

    .stat-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin: 0;
    }

    /* 对比评测 */
    .comparison-section {
      background-color: var(--bg-alt);
    }

    .comparison-wrapper {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 40px;
      align-items: center;
    }

    .rating-card {
      background: var(--primary-gradient);
      color: #FFFFFF;
      border-radius: 20px;
      padding: 40px 30px;
      text-align: center;
      box-shadow: var(--shadow-lg);
    }

    .rating-score {
      font-size: 4rem;
      font-weight: 900;
      line-height: 1;
      margin-bottom: 10px;
    }

    .rating-stars {
      font-size: 1.8rem;
      margin-bottom: 20px;
      color: #FBBF24; /* 金黄色 */
    }

    .rating-desc {
      font-size: 1.1rem;
      margin-bottom: 8px;
      font-weight: 700;
    }

    .rating-provider {
      font-size: 0.85rem;
      opacity: 0.9;
    }

    .comparison-details {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .comp-item {
      display: flex;
      justify-content: space-between;
      padding: 16px 0;
      border-bottom: 1px solid rgba(124, 58, 237, 0.1);
    }

    .comp-item:last-child {
      border-bottom: none;
    }

    .comp-label {
      font-weight: 700;
      color: var(--dark);
    }

    .comp-value {
      color: var(--primary);
      font-weight: 600;
      text-align: right;
    }

    /* 客户评论卡片 */
    .reviews-section {
      background-color: var(--bg-main);
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .review-card {
      background: var(--bg-alt);
      border: 1px solid rgba(124, 58, 237, 0.08);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .review-text {
      font-style: italic;
      color: var(--text-main);
      margin-bottom: 20px;
      font-size: 0.95rem;
      position: relative;
    }

    .review-text::before {
      content: '“';
      font-size: 3rem;
      color: rgba(124, 58, 237, 0.15);
      position: absolute;
      top: -20px;
      left: -10px;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid rgba(124, 58, 237, 0.1);
      padding-top: 15px;
    }

    .user-info h5 {
      font-size: 0.95rem;
      color: var(--dark);
      font-weight: 700;
    }

    .user-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 人工智能培训 & 职业技术培训 */
    .training-section {
      background-color: var(--bg-alt);
    }

    .training-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
    }

    .training-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .training-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }

    .training-card h3 {
      font-size: 1.3rem;
      color: var(--dark);
      margin-bottom: 12px;
      border-bottom: 2px solid var(--primary-light);
      padding-bottom: 10px;
    }

    .training-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .training-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
    }

    /* 常见用户问题 FAQ & 常见问题自助排查 */
    .faq-section {
      background-color: var(--bg-main);
    }

    .faq-wrapper {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .faq-item {
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px;
      background-color: var(--bg-alt);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question h4 {
      font-size: 1rem;
      color: var(--dark);
      font-weight: 700;
      margin: 0;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: var(--transition);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background-color: var(--bg-main);
    }

    .faq-answer-inner {
      padding: 20px;
      font-size: 0.95rem;
      color: var(--text-main);
      border-top: 1px solid var(--border-color);
      line-height: 1.6;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-item.active .faq-answer {
      max-height: 1000px;
      transition: max-height 1s cubic-bezier(1, 0, 1, 0);
    }

    /* 行业资讯 / 知识库 */
    .news-section {
      background-color: var(--bg-alt);
    }

    .news-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 30px;
      max-width: 900px;
      margin: 0 auto;
    }

    .news-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 25px;
      box-shadow: var(--shadow-sm);
    }

    .news-card h3 {
      font-size: 1.3rem;
      color: var(--dark);
      margin-bottom: 15px;
    }

    .articles-placeholder {
      padding: 15px;
      background: var(--bg-alt);
      border-radius: 8px;
      border: 1px dashed var(--primary);
      font-family: monospace;
      color: var(--primary);
      font-size: 0.95rem;
      margin-bottom: 20px;
    }

    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-links-list li a {
      color: var(--primary);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .article-links-list li a:hover {
      color: var(--accent);
      text-decoration: underline;
    }

    /* 智能需求匹配 (表单板块) */
    .match-section {
      background-color: var(--bg-main);
    }

    .match-container {
      max-width: 700px;
      margin: 0 auto;
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-weight: 600;
      color: var(--dark);
      margin-bottom: 8px;
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: var(--bg-main);
      color: var(--text-main);
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
    }

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

    /* 联系我们 & 二维码 */
    .contact-section {
      background-color: var(--bg-alt);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 50px;
      align-items: center;
    }

    .contact-info h3 {
      font-size: 1.8rem;
      color: var(--dark);
      margin-bottom: 20px;
    }

    .info-list {
      display: flex;
      flex-direction: column;
      gap: 15px;
      margin-bottom: 30px;
    }

    .info-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 1rem;
    }

    .info-item strong {
      color: var(--dark);
      width: 80px;
    }

    .contact-qrs {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .qr-box {
      text-align: center;
    }

    .qr-box img {
      width: 100%;
      max-width: 130px;
      height: auto;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      margin-bottom: 8px;
    }

    .qr-box p {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 页脚 */
    footer {
      background-color: var(--dark);
      color: #E2E8F0;
      padding: 60px 0 30px 0;
      font-size: 0.9rem;
    }

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

    .footer-col h4 {
      color: #FFFFFF;
      margin-bottom: 20px;
      font-size: 1.1rem;
      font-weight: 700;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul a {
      color: #94A3B8;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-col ul a:hover {
      color: #FFFFFF;
    }

    .footer-brand p {
      color: #94A3B8;
      margin-top: 10px;
      margin-bottom: 15px;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 10px;
    }

    .friend-links a {
      color: #94A3B8;
      font-size: 0.85rem;
      text-decoration: none;
      transition: var(--transition);
    }

    .friend-links a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 25px;
      text-align: center;
      color: #64748B;
      font-size: 0.8rem;
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--primary-gradient);
      color: white;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      font-size: 1.5rem;
      transition: var(--transition);
      border: none;
      position: relative;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: white;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 12px;
      box-shadow: var(--shadow-lg);
      display: none;
      text-align: center;
      width: 140px;
    }

    .float-qr-popup img {
      width: 100%;
      height: auto;
    }

    .float-qr-popup p {
      font-size: 0.75rem;
      color: var(--text-main);
      margin-top: 4px;
    }

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

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-features {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .comparison-wrapper, .cases-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: flex;
      }
      .hero-section h1 {
        font-size: 2.2rem;
      }
      .timeline::before {
        left: 20px;
      }
      .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
        text-align: left !important;
      }
      .timeline-badge {
        left: 5px !important;
      }
      .hero-features {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .contact-qrs {
        grid-template-columns: 1fr;
        justify-items: center;
      }
      .cases-assets {
        grid-template-columns: 1fr;
      }
    }