:root {
      --primary-cyan: #06b6d4;
      --primary-purple: #8b5cf6;
      --primary-pink: #ec4899;
      --primary-blue: #3b82f6;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-subtle: #f1f5f9;
      --border-color: #e2e8f0;
      --border-glow: rgba(139, 92, 246, 0.25);
      --neon-shadow: 0 10px 25px -5px rgba(6, 182, 212, 0.15), 0 8px 10px -6px rgba(139, 92, 246, 0.15);
      --card-radius: 16px;
      --btn-radius: 9999px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      -webkit-font-smoothing: antialiased;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(236, 72, 153, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(139, 92, 246, 0.03) 0%, transparent 60%);
      background-attachment: fixed;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      box-sizing: border-box;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
      border-radius: 8px;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 1.15rem;
      font-weight: 800;
      background: linear-gradient(135deg, #0f172a, #3b82f6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    .brand-desc {
      font-size: 0.75rem;
      color: var(--text-light);
      letter-spacing: 0.5px;
    }

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

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: 8px;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-blue);
      background: rgba(59, 130, 246, 0.08);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }

    .btn-neon-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      font-size: 0.92rem;
      font-weight: 700;
      color: #ffffff !important;
      background: linear-gradient(135deg, #06b6d4, #8b5cf6 50%, #ec4899);
      border: none;
      border-radius: var(--btn-radius);
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.35);
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
      white-space: nowrap;
    }

    .btn-neon-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(236, 72, 153, 0.45);
    }

    .btn-outline-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      background: #ffffff;
      border: 1.5px solid #cbd5e1;
      border-radius: var(--btn-radius);
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
    }

    .btn-outline-neon:hover {
      border-color: var(--primary-purple);
      color: var(--primary-purple);
      background: rgba(139, 92, 246, 0.04);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 HERO 区域 - 严格无图，纯CSS科技感 */
    .hero-section {
      padding: 70px 0 50px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid rgba(139, 92, 246, 0.3);
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 700;
      color: #6366f1;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.1);
      margin-bottom: 24px;
      animation: pulseGlow 3s infinite ease-in-out;
    }

    @keyframes pulseGlow {
      0%, 100% { box-shadow: 0 0 15px rgba(6, 182, 212, 0.2); }
      50% { box-shadow: 0 0 25px rgba(236, 72, 153, 0.3); }
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.2rem);
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -1px;
      color: var(--text-main);
      margin-bottom: 20px;
    }

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

    .hero-subtitle {
      max-width: 820px;
      margin: 0 auto 36px;
      font-size: 1.12rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1060px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--card-radius);
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
      position: relative;
      overflow: hidden;
      transition: var(--transition);
      text-align: center;
    }

    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #06b6d4, #8b5cf6, #ec4899);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--neon-shadow);
      border-color: rgba(139, 92, 246, 0.4);
    }

    .stat-value {
      font-size: 1.9rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-light);
      font-weight: 500;
    }

    /* 模型矩阵轮播/标签 */
    .models-ticker-wrap {
      margin-top: 40px;
      padding: 20px 0;
      border-top: 1px dashed var(--border-color);
      border-bottom: 1px dashed var(--border-color);
    }

    .models-ticker-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-light);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 14px;
    }

    .models-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-tag {
      padding: 5px 14px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 9999px;
      font-size: 0.82rem;
      font-weight: 600;
      color: #334155;
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary-cyan);
      color: var(--primary-cyan);
      box-shadow: 0 2px 8px rgba(6, 182, 212, 0.2);
    }

    /* 通用分节样式 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 750px;
      margin: 0 auto 50px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--primary-purple);
      background: rgba(139, 92, 246, 0.08);
      padding: 4px 14px;
      border-radius: 9999px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-lead {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 网格卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 30px 24px;
      transition: var(--transition);
      position: relative;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--neon-shadow);
      border-color: rgba(6, 182, 212, 0.4);
    }

    .card-icon-pill {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.1), rgba(139, 92, 246, 0.15));
      color: var(--primary-purple);
      border: 1px solid rgba(139, 92, 246, 0.2);
    }

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

    .feature-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .card-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: auto;
    }

    .card-tag {
      font-size: 0.76rem;
      font-weight: 600;
      color: var(--text-light);
      background: #f1f5f9;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 场景矩阵卡片样式 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .scenario-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 22px 18px;
      transition: var(--transition);
      border-left: 4px solid var(--primary-cyan);
    }

    .scenario-item:nth-child(even) {
      border-left-color: var(--primary-purple);
    }

    .scenario-item:nth-child(3n) {
      border-left-color: var(--primary-pink);
    }

    .scenario-item:hover {
      transform: translateY(-3px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
    }

    .scenario-item h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .scenario-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 流程步骤 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px 18px;
      text-align: center;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: var(--primary-purple);
      transform: translateY(-4px);
    }

    .step-number {
      width: 36px;
      height: 36px;
      margin: 0 auto 14px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      box-shadow: 0 4px 10px rgba(139, 92, 246, 0.3);
    }

    .step-card h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.84rem;
      color: var(--text-muted);
    }

    /* 案例中心展示区 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 20px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow: hidden;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.03);
      display: flex;
      flex-direction: column;
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--neon-shadow);
    }

    .case-media-box {
      width: 100%;
      background: #f1f5f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-media-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .case-card:hover .case-media-box img {
      transform: scale(1.03);
    }

    .case-content {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .case-content h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 12px;
    }

    /* 对比评测板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.08), rgba(139, 92, 246, 0.08));
      border: 1.5px solid rgba(139, 92, 246, 0.3);
      border-radius: var(--card-radius);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .eval-score-badge {
      font-size: 3rem;
      font-weight: 900;
      color: #7c3aed;
      line-height: 1;
      background: #ffffff;
      padding: 16px 24px;
      border-radius: 16px;
      border: 1px solid rgba(139, 92, 246, 0.2);
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.15);
    }

    .eval-score-text h4 {
      font-size: 1.3rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .comparison-table-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      overflow-x: auto;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

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

    .comparison-table tr:hover {
      background: rgba(241, 245, 249, 0.6);
    }

    .td-highlight {
      font-weight: 700;
      color: #7c3aed;
      background: rgba(139, 92, 246, 0.03);
    }

    /* 加盟代理与被动收入 */
    .partner-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
      border-radius: 20px;
      padding: 50px 40px;
      color: #ffffff;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
      position: relative;
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(15, 23, 42, 0.2);
    }

    .partner-banner::after {
      content: "";
      position: absolute;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(236, 72, 153, 0.3) 0%, transparent 70%);
      top: -100px;
      right: -100px;
      pointer-events: none;
    }

    .partner-content h3 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 14px;
      color: #ffffff;
    }

    .partner-content p {
      font-size: 1rem;
      color: #cbd5e1;
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .partner-perks {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-bottom: 28px;
    }

    .partner-perks li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.92rem;
      color: #e2e8f0;
    }

    .partner-perks li span {
      color: var(--primary-cyan);
      font-weight: bold;
    }

    .partner-action-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 16px;
      padding: 30px;
      text-align: center;
      backdrop-filter: blur(8px);
    }

    .partner-action-box h4 {
      font-size: 1.25rem;
      margin-bottom: 8px;
    }

    .partner-action-box p {
      font-size: 0.88rem;
      color: #94a3b8;
      margin-bottom: 20px;
    }

    /* 表单区域 */
    .form-container-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      padding: 40px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1.5px solid var(--border-color);
      border-radius: 10px;
      font-size: 0.92rem;
      font-family: inherit;
      color: var(--text-main);
      background: #f8fafc;
      transition: var(--transition);
      box-sizing: border-box;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-purple);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 用户评论 */
    .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(--card-radius);
      padding: 24px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--neon-shadow);
      border-color: rgba(236, 72, 153, 0.3);
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #ffffff;
      font-size: 1.1rem;
    }

    .review-user-info h5 {
      font-size: 0.98rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-user-info span {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    .review-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.8rem;
      color: #94a3b8;
      border-top: 1px solid #f1f5f9;
      padding-top: 10px;
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      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: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(139, 92, 246, 0.4);
    }

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--primary-purple);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 16px 24px 22px;
      border-top: 1px solid var(--border-color);
    }

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

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 20px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.04);
      border-color: var(--primary-cyan);
    }

    .article-card h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .article-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 12px;
      line-height: 1.5;
    }

    .article-link {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--primary-blue);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 页脚设计 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 70px 0 30px;
      border-top: 1px solid #1e293b;
      margin-top: 40px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 50px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      color: #ffffff;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.65;
      margin-bottom: 18px;
      color: #94a3b8;
    }

    .footer-col h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      border-bottom: 2px solid rgba(139, 92, 246, 0.4);
      display: inline-block;
      padding-bottom: 4px;
    }

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

    .footer-links-list a {
      color: #94a3b8;
      font-size: 0.86rem;
      transition: var(--transition);
    }

    .footer-links-list a:hover {
      color: var(--primary-cyan);
      padding-left: 4px;
    }

    .footer-qr-card {
      background: #1e293b;
      padding: 16px;
      border-radius: 12px;
      text-align: center;
      display: inline-block;
    }

    .footer-qr-card img {
      width: 110px;
      height: 110px;
      border-radius: 6px;
      margin-bottom: 8px;
    }

    .footer-qr-card span {
      display: block;
      font-size: 0.78rem;
      color: #cbd5e1;
    }

    .friendly-links-wrap {
      border-top: 1px solid #1e293b;
      padding: 24px 0;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      font-size: 0.84rem;
    }

    .friendly-links-wrap span {
      color: #ffffff;
      font-weight: 700;
    }

    .friendly-links-wrap a {
      color: #94a3b8;
      transition: var(--transition);
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #64748b;
    }

    /* 悬浮客服挂件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .kefu-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-cyan), var(--primary-purple));
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      position: relative;
    }

    .kefu-btn:hover {
      transform: scale(1.08);
    }

    .kefu-popover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 14px;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
    }

    .kefu-btn:hover .kefu-popover {
      display: block;
    }

    .kefu-popover img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      margin-bottom: 6px;
    }

    .kefu-popover p {
      font-size: 0.75rem;
      color: var(--text-main);
      font-weight: 600;
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .case-gallery-grid, .reviews-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .partner-banner {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-wrapper {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 24px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
      }
      .nav-wrapper.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
        width: 100%;
      }
      .header-actions .btn-outline-neon {
        display: none;
      }
      .hero-stats-grid, .grid-3, .grid-4, .grid-2, .case-gallery-grid, .reviews-grid, .articles-grid, .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .workflow-steps {
        grid-template-columns: 1fr;
      }
      .partner-perks {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        align-items: flex-start;
      }
    }