:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary: #0284c7;
      --neon-cyan: #00f0ff;
      --neon-purple: #a855f7;
      --neon-pink: #ec4899;
      --neon-lime: #10b981;
      --border-color: #e2e8f0;
      --glow-border: linear-gradient(135deg, rgba(0, 240, 255, 0.4), rgba(168, 85, 247, 0.4));
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-glow: 0 12px 30px rgba(0, 240, 255, 0.12);
    }

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

    html {
      scroll-behavior: smooth;
      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);
    }

    body {
      min-width: 320px;
      line-height: 1.6;
      background: radial-gradient(circle at 10% 10%, rgba(0, 240, 255, 0.04), transparent 40%),
                  radial-gradient(circle at 90% 40%, rgba(168, 85, 247, 0.04), transparent 45%),
                  radial-gradient(circle at 50% 80%, rgba(236, 72, 153, 0.03), transparent 50%),
                  #f8fafc;
      color: var(--text-main);
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

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

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

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

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      background: linear-gradient(135deg, #0284c7, #9333ea);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.25s ease;
      position: relative;
    }

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

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

    .btn-top-portal {
      display: inline-flex;
      align-items: center;
      padding: 8px 18px;
      font-size: 14px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #0ea5e9, #8b5cf6);
      border-radius: 9999px;
      box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-top-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 6px 10px;
      font-size: 18px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 50px;
      text-align: center;
      position: relative;
    }

    .hero-glow-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(0, 240, 255, 0.1), rgba(168, 85, 247, 0.1));
      border: 1px solid rgba(168, 85, 247, 0.3);
      border-radius: 999px;
      font-size: 13px;
      font-weight: 700;
      color: #6b21a8;
      margin-bottom: 24px;
      box-shadow: 0 2px 10px rgba(168, 85, 247, 0.1);
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #0284c7 0%, #7c3aed 50%, #db2777 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .btn-hero-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 800;
      color: #ffffff;
      background: linear-gradient(135deg, #0ea5e9 0%, #6366f1 50%, #d946ef 100%);
      border-radius: 9999px;
      box-shadow: 0 10px 25px rgba(99, 102, 241, 0.35);
      transition: all 0.25s ease;
      position: relative;
      overflow: hidden;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 32px rgba(99, 102, 241, 0.45);
    }

    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 700;
      color: #0f172a;
      background: #ffffff;
      border: 1px solid rgba(2, 132, 199, 0.4);
      border-radius: 9999px;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
      transition: all 0.25s ease;
    }

    .btn-hero-secondary:hover {
      border-color: #0284c7;
      background: #f0f9ff;
      transform: translateY(-2px);
    }

    /* 炫彩统计条 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .stat-card {
      background: rgba(255, 255, 255, 0.85);
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: all 0.25s ease;
    }

    .stat-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-glow);
      border-color: rgba(0, 240, 255, 0.5);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 900;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 模块通用样式 */
    .section-block {
      padding: 60px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 40px;
    }

    .section-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 800;
      letter-spacing: 1px;
      text-transform: uppercase;
      padding: 4px 12px;
      border-radius: 999px;
      background: rgba(14, 165, 233, 0.1);
      color: #0284c7;
      margin-bottom: 10px;
      border: 1px solid rgba(14, 165, 233, 0.25);
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台模型矩阵 */
    .model-chips-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .model-chips-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
      text-align: center;
    }

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

    .model-chip {
      background: #f1f5f9;
      border: 1px solid #e2e8f0;
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: #ffffff;
      color: #0284c7;
      border-color: #0284c7;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.15);
    }

    /* 平台核心能力卡片 */
    .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: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
      border-color: rgba(14, 165, 233, 0.5);
    }

    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
      background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(168, 85, 247, 0.15));
      color: #0284c7;
      border: 1px solid rgba(0, 240, 255, 0.3);
    }

    .service-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

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

    .service-tag {
      font-size: 12px;
      padding: 3px 8px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: 4px;
      color: #64748b;
    }

    /* 宣传展示与图文组合区 */
    .feature-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
      margin-bottom: 40px;
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .feature-content h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }

    .feature-content p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .feature-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      margin-bottom: 20px;
    }

    .feature-list li {
      font-size: 14px;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .feature-list li::before {
      content: "✓";
      color: #10b981;
      font-weight: 900;
    }

    .feature-media-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #f1f5f9;
    }

    .feature-media-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-index {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      color: #ffffff;
      font-size: 15px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25);
    }

    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
    }

    .compare-header-box {
      background: linear-gradient(90deg, #f0f9ff, #faf5ff);
      padding: 24px;
      border-bottom: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-badge-group {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-big {
      font-size: 32px;
      font-weight: 900;
      color: #0284c7;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }

    .score-big span {
      font-size: 16px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .star-rating {
      color: #f59e0b;
      font-size: 18px;
      letter-spacing: 2px;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .compare-table td:first-child {
      font-weight: 600;
      color: var(--text-main);
      width: 22%;
    }

    .compare-table .highlight-col {
      background: rgba(240, 249, 255, 0.6);
      color: #0284c7;
      font-weight: 600;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

    .review-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: normal;
    }

    .review-user-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }

    .user-avatar-tag {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #a855f7);
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .user-meta h3 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

    .user-meta p {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 表单与需求匹配区 */
    .form-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-info h3 {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .form-info p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .contact-badge-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 14px;
      color: var(--text-main);
      background: #f8fafc;
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid #e2e8f0;
    }

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

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #f8fafc;
      color: var(--text-main);
      outline: none;
      transition: all 0.2s ease;
    }

    .form-control:focus {
      background: #ffffff;
      border-color: #0284c7;
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    .btn-submit-form {
      padding: 12px 24px;
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.3);
      transition: all 0.25s ease;
    }

    .btn-submit-form:hover {
      opacity: 0.95;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(2, 132, 199, 0.4);
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-item:hover {
      border-color: rgba(2, 132, 199, 0.4);
    }

    .faq-question {
      width: 100%;
      padding: 16px 20px;
      text-align: left;
      background: none;
      border: none;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .faq-icon {
      font-size: 18px;
      color: #0284c7;
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      border-top: 1px solid transparent;
      padding: 0 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 14px 20px 18px;
      border-top-color: var(--border-color);
    }

    /* 文章列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.2s ease;
    }

    .article-card:hover {
      transform: translateY(-3px);
      border-color: #0284c7;
      box-shadow: var(--shadow-md);
    }

    .article-tag {
      font-size: 12px;
      font-weight: 700;
      color: #0284c7;
      background: #e0f2fe;
      padding: 3px 8px;
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 10px;
    }

    .article-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 10px;
      line-height: 1.5;
    }

    .article-title a:hover {
      color: #0284c7;
    }

    .article-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 14px;
    }

    .article-link {
      font-size: 13px;
      font-weight: 700;
      color: #0284c7;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 友情链接与微信客服区 */
    .bottom-connect-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 40px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 24px;
    }

    .qr-group {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .qr-img-box {
      width: 100px;
      height: 100px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 4px;
      background: #ffffff;
    }

    .qr-img-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .qr-text h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .qr-text p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .friend-links-area {
      flex: 1;
      min-width: 280px;
    }

    .friend-links-area h3 {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    .friend-links-list a {
      font-size: 13px;
      color: var(--text-muted);
      background: #f1f5f9;
      padding: 6px 12px;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }

    .friend-links-list a:hover {
      background: #ffffff;
      color: #0284c7;
      border-color: #0284c7;
    }

    /* 底部页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 40px 0 24px;
      font-size: 13px;
      border-top: 1px solid #1e293b;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 20px;
    }

    .footer-brand {
      color: #ffffff;
      font-size: 18px;
      font-weight: 800;
    }

    .footer-links {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: #cbd5e1;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: #00f0ff;
    }

    .footer-copy {
      text-align: center;
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      color: #64748b;
    }

    /* 悬浮工具 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-size: 18px;
      transition: all 0.2s ease;
    }

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

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .feature-row {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-section-wrap {
        grid-template-columns: 1fr;
      }
      .articles-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-wrapper {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        padding: 16px 20px;
      }
      .nav-wrapper.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid #f1f5f9;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .services-grid {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .bottom-connect-box {
        flex-direction: column;
        align-items: flex-start;
      }
      .form-section-wrap {
        padding: 24px 16px;
      }
    }