:root {
      --primary: #ff5722;
      --primary-hover: #f44336;
      --primary-light: #fff3e0;
      --primary-glow: rgba(255, 87, 34, 0.15);
      --accent-warm: #ff9800;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-light: #94a3b8;
      --bg-main: #fffdfc;
      --bg-card: #ffffff;
      --bg-alt: #fef7f2;
      --border-color: #fde5d7;
      --border-subtle: #f1f5f9;
      --shadow-sm: 0 2px 8px rgba(255, 87, 34, 0.05);
      --shadow-md: 0 8px 24px rgba(255, 87, 34, 0.08);
      --shadow-lg: 0 16px 36px rgba(234, 88, 12, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.28s ease;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: radial-gradient(#ffe0d2 1px, transparent 1px);
      background-size: 32px 32px;
      background-position: 0 0;
    }

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

    /* 统一规范容器 */
    .site-container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 253, 252, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-box .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      font-size: 0.925rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

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

    .btn-header-cta {
      background: linear-gradient(135deg, var(--primary), var(--accent-warm));
      color: #ffffff !important;
      padding: 9px 20px;
      font-size: 0.9rem;
      font-weight: 600;
      border-radius: 50px;
      box-shadow: 0 4px 12px rgba(255, 87, 34, 0.25);
    }

    .btn-header-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(255, 87, 34, 0.35);
    }

    .mobile-menu-btn {
      display: none;
      background: transparent;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
    }

    .hero-inner {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--primary);
      padding: 6px 18px;
      border-radius: 50px;
      font-size: 0.875rem;
      font-weight: 600;
      border: 1px solid #ffd8c7;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #e64a19, #f57c00);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }

    .btn-main-primary {
      background: linear-gradient(135deg, var(--primary), #e64a19);
      color: #ffffff;
      padding: 14px 34px;
      border-radius: 50px;
      font-size: 1.05rem;
      font-weight: 600;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(255, 87, 34, 0.3);
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(255, 87, 34, 0.4);
      color: #ffffff;
    }

    .btn-main-outline {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      padding: 14px 30px;
      border-radius: 50px;
      font-size: 1.05rem;
      font-weight: 600;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

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

    /* 首屏数据卡片 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 8px;
    }

    .stat-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-sub {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 公共模块头 */
    .section-head {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    section {
      padding: 70px 0;
      position: relative;
    }

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

    /* 平台介绍 */
    .about-box-wrap {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: center;
    }

    .about-card-body {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 36px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .about-card-body h3 {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .about-card-body p {
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.7;
    }

    .about-feature-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 24px;
    }

    .about-feature-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.925rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .about-feature-list li::before {
      content: "✓";
      color: var(--primary);
      font-weight: 800;
    }

    .about-media-box {
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #ffffff;
    }

    .about-media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .about-media-box:hover img {
      transform: scale(1.02);
    }

    /* 模型矩阵标签云 */
    .model-tags-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-top: 36px;
      box-shadow: var(--shadow-sm);
    }

    .model-tags-container h4 {
      font-size: 1.1rem;
      margin-bottom: 16px;
      text-align: center;
      color: var(--text-main);
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-chip {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--text-main);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 一站式核心服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 18px;
      border: 1px solid var(--border-color);
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 18px;
    }

    .service-tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .service-tag {
      background: var(--bg-alt);
      color: var(--text-muted);
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 500;
    }

    /* 行业方案图文双拼 */
    .solutions-row {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .solution-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .solution-item-img {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16 / 9;
      background: #eee;
    }

    .solution-item-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
      display: block;
    }

    .solution-item:hover .solution-item-img img {
      transform: scale(1.04);
    }

    .solution-content {
      padding: 24px;
      flex-grow: 1;
    }

    .solution-content h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .solution-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .flow-steps {
      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-md);
      padding: 24px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-badge {
      width: 42px;
      height: 42px;
      line-height: 42px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      font-size: 1.1rem;
      border-radius: 50%;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(255, 87, 34, 0.3);
    }

    .step-card h4 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测高光区 */
    .compare-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .rating-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #fff3e0, #ffe0d2);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 28px;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-left {
      display: flex;
      align-items: center;
      gap: 18px;
    }

    .rating-score {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .rating-details h4 {
      font-size: 1.2rem;
      color: var(--text-main);
    }

    .rating-stars {
      color: #ff9800;
      font-size: 1.1rem;
      margin-top: 4px;
    }

    .rating-btn a {
      background: var(--primary);
      color: #ffffff;
      padding: 10px 22px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      display: inline-block;
    }

    .table-container {
      overflow-x: auto;
      width: 100%;
    }

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

    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .custom-table th {
      background: var(--bg-alt);
      color: var(--text-main);
      font-weight: 700;
    }

    .custom-table tr:hover td {
      background: #fffaf7;
    }

    .table-highlight {
      color: var(--primary);
      font-weight: 700;
      background: rgba(255, 87, 34, 0.03);
    }

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

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

    .pricing-card.popular {
      border: 2px solid var(--primary);
      transform: scale(1.03);
      box-shadow: var(--shadow-lg);
    }

    .popular-tag {
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: 50px;
    }

    .pricing-tier {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .pricing-cost {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin: 16px 0;
    }

    .pricing-cost span {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 400;
    }

    .pricing-features {
      list-style: none;
      text-align: left;
      margin: 24px 0;
      padding-top: 16px;
      border-top: 1px solid var(--border-subtle);
    }

    .pricing-features li {
      margin-bottom: 10px;
      font-size: 0.9rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pricing-features li::before {
      content: "•";
      color: var(--primary);
      font-size: 1.2rem;
    }

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

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

    .review-text {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      position: relative;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-subtle);
      padding-top: 14px;
    }

    .reviewer-avatar-placeholder {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 1rem;
    }

    .reviewer-meta h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      font-weight: 700;
    }

    .reviewer-meta span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.025rem;
      color: var(--text-main);
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: #fffcfb;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 需求匹配与联系我们表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: start;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-card h3 {
      font-size: 1.4rem;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-card p {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-bottom: 24px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.925rem;
      background: #fafafa;
      color: var(--text-main);
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 87, 34, 0.15);
    }

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

    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, var(--primary), #e64a19);
      color: #ffffff;
      border: none;
      padding: 14px;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
      box-shadow: 0 6px 18px rgba(255, 87, 34, 0.25);
    }

    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(255, 87, 34, 0.35);
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .contact-item {
      margin-bottom: 20px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .contact-item:last-child {
      margin-bottom: 0;
      padding-bottom: 0;
      border-bottom: none;
    }

    .contact-label {
      font-size: 0.825rem;
      color: var(--text-muted);
      margin-bottom: 4px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .contact-val {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .qr-group {
      display: flex;
      align-items: center;
      gap: 20px;
      margin-top: 20px;
      background: var(--bg-alt);
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qr-image-wrap {
      width: 90px;
      height: 90px;
      background: #ffffff;
      padding: 4px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      flex-shrink: 0;
    }

    .qr-image-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .qr-desc h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .qr-desc p {
      font-size: 0.8rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    /* 资讯与动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .news-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .news-date {
      font-size: 0.8rem;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .news-excerpt {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .news-link {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 页脚 */
    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 50px 0 24px;
      color: var(--text-muted);
      font-size: 0.875rem;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.25rem;
      color: var(--primary);
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-brand p {
      line-height: 1.6;
      max-width: 320px;
    }

    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

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

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

    .footer-links-box {
      border-top: 1px solid var(--border-subtle);
      padding: 20px 0;
      margin-bottom: 20px;
    }

    .footer-links-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .footer-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .footer-links-wrap a {
      color: var(--text-muted);
      font-size: 0.825rem;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-subtle);
      padding-top: 20px;
      text-align: center;
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 悬浮客服面板 */
    .float-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-size: 1.2rem;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-3px);
    }

    .float-qr-pop {
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 160px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      opacity: 0;
      pointer-events: none;
      transition: var(--transition);
      text-align: center;
    }

    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      border-radius: 4px;
      margin-bottom: 6px;
    }

    .float-qr-pop p {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .float-btn:hover .float-qr-pop {
      opacity: 1;
      pointer-events: auto;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .services-grid, .pricing-grid, .reviews-grid, .news-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-box-wrap, .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .services-grid, .solutions-row, .pricing-grid, .reviews-grid, .news-grid, .hero-stats-grid, .flow-steps {
        grid-template-columns: 1fr;
      }
      .pricing-card.popular {
        transform: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid var(--border-subtle);
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }