/* 基础重置 & 全局样式 */
    :root {
      --primary-color: #00e676; /* 夺目鲜绿 */
      --primary-hover: #00c853; 
      --bg-dark: #0f172a; 
      --text-dark: #1e293b;
      --text-light: #64748b;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --border-color: #e2e8f0;
      --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-dark);
      background-color: var(--bg-light);
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.3s ease;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    /* 通用容器 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--bg-dark);
      position: relative;
      display: inline-block;
      padding-bottom: 12px;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background-color: var(--primary-color);
      border-radius: 2px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-light);
      margin-top: 12px;
    }

    /* 按钮样式 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 8px;
      transition: all 0.3s ease;
      cursor: pointer;
      border: none;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: var(--bg-dark);
      box-shadow: 0 4px 14px rgba(0, 230, 118, 0.4);
    }

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

    .btn-outline {
      background-color: transparent;
      border: 2px solid var(--primary-color);
      color: var(--bg-dark);
    }

    .btn-outline:hover {
      background-color: rgba(0, 230, 118, 0.1);
      transform: translateY(-2px);
    }

    /* 顶部导航 */
    header.site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
      z-index: 1000;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 80px;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

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

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--bg-dark);
    }

    .nav-menu {
      display: flex;
      list-style: none;
    }

    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-dark);
      padding: 8px 12px;
      border-radius: 4px;
    }

    .nav-link:hover {
      color: var(--primary-hover);
      background-color: rgba(0, 230, 118, 0.05);
    }

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

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 6px;
      cursor: pointer;
      border: none;
      background: transparent;
      padding: 4px;
    }

    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--bg-dark);
      transition: all 0.3s ease;
    }

    /* Hero 首屏 (纯CSS，无图片) */
    .hero-section {
      padding-top: 140px;
      padding-bottom: 80px;
      background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 50%, #f8fafc 100%);
      position: relative;
      overflow: hidden;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.8rem;
      line-height: 1.25;
      color: var(--bg-dark);
      margin-bottom: 20px;
    }

    .hero-content h1 span {
      color: var(--primary-hover);
      position: relative;
    }

    .hero-description {
      font-size: 1.15rem;
      color: var(--text-light);
      margin-bottom: 32px;
      max-width: 600px;
    }

    .hero-cta {
      display: flex;
      gap: 16px;
      margin-bottom: 40px;
    }

    /* 首屏右侧科技卡片堆叠（替代图片） */
    .hero-visual {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .tech-card {
      background: rgba(255, 255, 255, 0.9);
      border-left: 5px solid var(--primary-color);
      border-radius: 12px;
      padding: 20px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      backdrop-filter: blur(5px);
      transform: translateY(0);
      transition: transform 0.3s ease;
    }

    .tech-card:hover {
      transform: translateY(-5px);
    }

    .tech-card-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 6px;
    }

    .tech-card-desc {
      font-size: 0.875rem;
      color: var(--text-light);
    }

    /* 样式组件 */
    section {
      padding: 80px 0;
    }

    .bg-white {
      background-color: var(--bg-white);
    }

    /* 数据指标卡片 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-card {
      background: var(--bg-white);
      padding: 30px 20px;
      border-radius: 12px;
      text-align: center;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .stat-card:hover {
      border-color: var(--primary-color);
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 230, 118, 0.1);
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--primary-hover);
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-dark);
    }

    /* 平台介绍 / 关于我们 */
    .about-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .about-intro-txt {
      font-size: 1.05rem;
      color: var(--text-light);
      margin-bottom: 24px;
      line-height: 1.8;
    }

    .feature-list {
      list-style: none;
    }

    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
    }

    .feature-icon-bullet {
      background-color: rgba(0, 230, 118, 0.1);
      color: var(--primary-hover);
      width: 24px;
      height: 24px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: bold;
      font-size: 0.85rem;
    }

    .feature-text h4 {
      font-size: 1.05rem;
      color: var(--bg-dark);
      margin-bottom: 4px;
    }

    .feature-text p {
      font-size: 0.9rem;
      color: var(--text-light);
    }

    /* 服务能力卡片 / AIGC 制作场景 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-light);
      border-radius: 12px;
      padding: 32px;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .service-card:hover {
      background: var(--bg-white);
      border-color: var(--primary-color);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      transform: translateY(-5px);
    }

    .service-icon {
      font-size: 2.2rem;
      margin-bottom: 20px;
      display: inline-block;
    }

    .service-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 12px;
    }

    .service-desc {
      font-size: 0.9rem;
      color: var(--text-light);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .service-tag {
      font-size: 0.75rem;
      background: rgba(0, 230, 118, 0.1);
      color: var(--primary-hover);
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 500;
    }

    /* 全国服务网络 & 全行业解决方案 */
    .solution-box {
      background: var(--bg-white);
      border-radius: 16px;
      padding: 40px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.02);
      border: 1px solid var(--border-color);
    }

    .solution-tabs {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 30px;
      flex-wrap: wrap;
    }

    .tab-btn {
      padding: 10px 20px;
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      cursor: pointer;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all 0.3s ease;
    }

    .tab-btn.active, .tab-btn:hover {
      background: var(--primary-color);
      color: var(--bg-dark);
      border-color: var(--primary-color);
    }

    .solution-content {
      display: none;
      animation: fadeIn 0.5s ease forwards;
    }

    .solution-content.active {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 32px;
      align-items: center;
    }

    .solution-text h3 {
      font-size: 1.4rem;
      color: var(--bg-dark);
      margin-bottom: 16px;
    }

    .solution-list {
      margin-left: 20px;
      margin-bottom: 24px;
    }

    .solution-list li {
      margin-bottom: 8px;
      font-size: 0.95rem;
      color: var(--text-dark);
    }

    .network-badge {
      display: inline-block;
      background: #e0f2fe;
      color: #0369a1;
      padding: 6px 12px;
      border-radius: 4px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-top: 12px;
    }

    /* 流程步骤与技术标准 */
    .timeline {
      position: relative;
      max-width: 800px;
      margin: 0 auto;
      padding: 20px 0;
    }

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

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

    .timeline-item::after {
      content: '';
      position: absolute;
      top: 26px;
      right: -8px;
      width: 16px;
      height: 16px;
      background: var(--primary-color);
      border: 4px solid var(--bg-white);
      border-radius: 50%;
      z-index: 1;
    }

    .timeline-item.left {
      left: 0;
      text-align: right;
    }

    .timeline-item.right {
      left: 50%;
      text-align: left;
    }

    .timeline-item.right::after {
      left: -8px;
    }

    .timeline-content {
      background: var(--bg-white);
      padding: 24px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0,0,0,0.02);
    }

    .timeline-step {
      font-size: 0.8rem;
      font-weight: 800;
      color: var(--primary-hover);
      text-transform: uppercase;
      margin-bottom: 6px;
    }

    .timeline-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--bg-dark);
    }

    .timeline-desc {
      font-size: 0.875rem;
      color: var(--text-light);
    }

    /* 对比评测板块 */
    .eval-box {
      background: var(--bg-white);
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: 0 10px 40px rgba(0,0,0,0.02);
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      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: 12px;
    }

    .score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary-hover);
    }

    .score-detail {
      font-size: 0.9rem;
    }

    .rating-stars {
      color: #fbbf24;
      font-size: 1.2rem;
    }

    .eval-table-container {
      overflow-x: auto;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .eval-table th, .eval-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .eval-table th {
      font-weight: 700;
      color: var(--bg-dark);
      background-color: var(--bg-light);
    }

    .eval-table td strong {
      color: var(--primary-hover);
    }

    .check-yes {
      color: #10b981;
      font-weight: bold;
    }

    .check-no {
      color: #ef4444;
    }

    /* Token 比价参考 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .token-card {
      background: var(--bg-white);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 24px;
      transition: all 0.3s ease;
    }

    .token-card:hover {
      border-color: var(--primary-color);
      box-shadow: 0 8px 24px rgba(0,0,0,0.05);
    }

    .token-model {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 12px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .model-badge {
      font-size: 0.75rem;
      background: #f1f5f9;
      padding: 2px 8px;
      border-radius: 4px;
      color: var(--text-light);
    }

    .token-price-list {
      list-style: none;
    }

    .token-price-list li {
      display: flex;
      justify-content: space-between;
      padding: 8px 0;
      font-size: 0.9rem;
      border-bottom: 1px dashed var(--border-color);
    }

    .token-price-list li:last-child {
      border-bottom: none;
    }

    .price-val {
      font-weight: 700;
      color: var(--primary-hover);
    }

    /* 职业/人工智能技术培训 */
    .training-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .train-card {
      background: var(--bg-white);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 30px;
      display: flex;
      gap: 20px;
    }

    .train-icon {
      font-size: 2rem;
      color: var(--primary-hover);
      background: rgba(0, 230, 118, 0.1);
      width: 60px;
      height: 60px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
    }

    .train-info h3 {
      font-size: 1.2rem;
      color: var(--bg-dark);
      margin-bottom: 8px;
    }

    .train-info p {
      font-size: 0.9rem;
      color: var(--text-light);
      margin-bottom: 12px;
    }

    .train-meta {
      font-size: 0.8rem;
      color: var(--primary-hover);
      font-weight: 600;
    }

    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-white);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    }

    .case-img-wrap {
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
      position: relative;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-square-wrap {
      aspect-ratio: 1 / 1;
    }

    .case-body {
      padding: 20px;
    }

    .case-tag {
      font-size: 0.75rem;
      color: var(--primary-hover);
      font-weight: 600;
      text-transform: uppercase;
      margin-bottom: 8px;
      display: inline-block;
    }

    .case-title {
      font-size: 1.1rem;
      color: var(--bg-dark);
      margin-bottom: 8px;
      font-weight: 700;
    }

    .case-desc {
      font-size: 0.85rem;
      color: var(--text-light);
    }

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

    .review-card {
      background: var(--bg-white);
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.02);
    }

    .review-content {
      font-style: italic;
      color: var(--text-dark);
      font-size: 0.95rem;
      margin-bottom: 20px;
      line-height: 1.7;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--bg-dark);
      border: 2px solid var(--primary-color);
    }

    .author-info h4 {
      font-size: 0.95rem;
      color: var(--bg-dark);
    }

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

    /* 常见问题自助排查 & FAQ 折叠面板 */
    .faq-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

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

    .faq-item {
      background: var(--bg-white);
      border-radius: 8px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      font-weight: 600;
      color: var(--bg-dark);
      background-color: var(--bg-white);
    }

    .faq-header:hover {
      background-color: var(--bg-light);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: var(--bg-white);
    }

    .faq-content {
      padding: 0 24px 18px 24px;
      font-size: 0.9rem;
      color: var(--text-light);
      line-height: 1.6;
      border-top: 1px solid transparent;
    }

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

    .faq-item.active .faq-body {
      max-height: 200px;
    }

    /* 行业资讯 / 知识库 / AI术语百科 */
    .knowledge-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 32px;
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .news-item {
      background: var(--bg-white);
      padding: 20px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      transition: all 0.3s ease;
    }

    .news-item:hover {
      border-color: var(--primary-color);
      transform: translateX(4px);
    }

    .news-title-link {
      font-weight: 600;
      color: var(--bg-dark);
      font-size: 1rem;
    }

    .news-title-link:hover {
      color: var(--primary-hover);
    }

    .news-meta {
      font-size: 0.8rem;
      color: var(--text-light);
      white-space: nowrap;
    }

    .terms-box {
      background: var(--bg-white);
      padding: 24px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .terms-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--bg-dark);
      margin-bottom: 16px;
    }

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

    .term-tag {
      background: var(--bg-light);
      padding: 6px 12px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 500;
      color: var(--text-dark);
      border: 1px solid var(--border-color);
    }

    .term-tag:hover {
      background: var(--primary-color);
      color: var(--bg-dark);
      border-color: var(--primary-color);
    }

    /* 需求匹配表单 & 联系我们 & 加盟代理 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
    }

    .form-wrapper {
      background: var(--bg-white);
      border-radius: 12px;
      padding: 32px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--bg-dark);
    }

    .form-control {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background-color: var(--bg-light);
      font-family: inherit;
      font-size: 0.95rem;
      color: var(--text-dark);
      transition: border-color 0.3s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      background-color: var(--bg-white);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    .info-panel {
      background: var(--bg-white);
      border-radius: 12px;
      padding: 32px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }

    .info-icon {
      font-size: 1.5rem;
      color: var(--primary-hover);
    }

    .info-content h4 {
      font-size: 1rem;
      color: var(--bg-dark);
      margin-bottom: 4px;
    }

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

    .kefu-qrcode-wrap {
      text-align: center;
      margin-top: 12px;
      background: var(--bg-light);
      padding: 16px;
      border-radius: 8px;
      border: 1px dashed var(--border-color);
    }

    .kefu-qrcode-wrap img {
      width: 140px;
      height: 140px;
      margin: 0 auto 8px auto;
      border-radius: 4px;
    }

    /* 页脚 */
    footer.site-footer {
      background-color: var(--bg-dark);
      color: #94a3b8;
      padding: 60px 0 20px 0;
      border-top: 1px solid #1e293b;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1.5fr;
      gap: 48px;
      padding-bottom: 40px;
      border-bottom: 1px solid #1e293b;
    }

    .footer-brand h3 {
      font-size: 1.25rem;
      color: var(--bg-white);
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.7;
    }

    .footer-links h4 {
      font-size: 1rem;
      color: var(--bg-white);
      margin-bottom: 16px;
    }

    .footer-links ul {
      list-style: none;
    }

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

    .footer-links ul li a {
      font-size: 0.9rem;
    }

    .footer-links ul li a:hover {
      color: var(--primary-color);
    }

    .friendship-links {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .friendship-links a {
      font-size: 0.85rem;
      background: #1e293b;
      color: #94a3b8;
      padding: 6px 12px;
      border-radius: 4px;
    }

    .friendship-links a:hover {
      background: var(--primary-color);
      color: var(--bg-dark);
    }

    .footer-bottom {
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      flex-wrap: wrap;
      gap: 16px;
    }

    /* 浮动客服栏 */
    .float-toolbar {
      position: fixed;
      right: 24px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .float-item {
      width: 50px;
      height: 50px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      cursor: pointer;
      position: relative;
      transition: all 0.3s ease;
    }

    .float-item:hover {
      background: var(--primary-color);
      color: var(--bg-dark);
      border-color: var(--primary-color);
      transform: translateY(-2px);
    }

    .float-icon {
      font-size: 1.25rem;
      font-weight: bold;
    }

    /* 二维码悬停面板 */
    .qrcode-popover {
      position: absolute;
      bottom: 60px;
      right: 0;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: 8px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.15);
      display: none;
      flex-direction: column;
      align-items: center;
      width: 160px;
    }

    .qrcode-popover img {
      width: 120px;
      height: 120px;
      margin-bottom: 8px;
    }

    .qrcode-popover span {
      font-size: 0.75rem;
      color: var(--text-dark);
      font-weight: 600;
    }

    .float-item:hover .qrcode-popover {
      display: flex;
    }

    /* 动画定义 */
    @keyframes fadeIn {
      from {
        opacity: 0;
        transform: translateY(10px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-grid, .about-layout, .solution-content.active, .contact-layout {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .services-grid, .cases-grid, .reviews-grid, .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .training-grid, .faq-layout, .knowledge-grid {
        grid-template-columns: 1fr;
      }

      .timeline::before {
        left: 30px;
      }

      .timeline-item {
        width: 100%;
        padding-left: 60px;
        padding-right: 0;
      }

      .timeline-item.left {
        text-align: left;
      }

      .timeline-item.left::after, .timeline-item.right::after {
        left: 22px;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 24px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        border-top: 1px solid var(--border-color);
      }

      .nav-menu.active {
        display: flex;
      }

      .menu-toggle {
        display: flex;
      }

      .nav-btn-group {
        display: none;
      }

      .hero-content h1 {
        font-size: 2.2rem;
      }

      .stats-grid, .services-grid, .cases-grid, .reviews-grid, .token-grid {
        grid-template-columns: 1fr;
      }

      .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }