:root {
      --primary: #4f46e5;
      --primary-vibrant: #6366f1;
      --secondary-pink: #ec4899;
      --secondary-amber: #f59e0b;
      --secondary-cyan: #06b6d4;
      --secondary-violet: #8b5cf6;
      --gradient-brand: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
      --gradient-accent: linear-gradient(135deg, #ff007a 0%, #7928ca 50%, #0070f3 100%);
      --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-alt: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --border-vibrant: #cbd5e1;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 6px 20px rgba(79, 70, 229, 0.08);
      --shadow-lg: 0 12px 32px rgba(99, 102, 241, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --max-width: 1240px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* 通用容器规范 - 全站统一 */
    .container {
      width: 100%;
      max-width: var(--max-width);
      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, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-group .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0; /* 严格满足 gap 为 0 规则 */
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-muted);
      font-weight: 600;
      font-size: 0.95rem;
      text-decoration: none;
      transition: var(--transition);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: rgba(99, 102, 241, 0.08);
    }

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

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      color: var(--text-main);
    }

    /* 按钮规范 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      font-size: 0.95rem;
      gap: 8px;
    }

    .btn-primary {
      background: var(--gradient-brand);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
      color: #ffffff;
    }

    .btn-accent {
      background: var(--gradient-warm);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
    }

    .btn-accent:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(245, 158, 11, 0.5);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      border-color: var(--primary);
      color: var(--primary);
    }

    .btn-outline:hover {
      background: rgba(99, 102, 241, 0.06);
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 1.05rem;
    }

    /* 首屏 HERO（严格无图片，纯色彩/渐变/几何/动效） */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.12) 0%, rgba(99, 102, 241, 0.08) 35%, rgba(248, 250, 252, 0.9) 70%), #f8fafc;
      padding: 70px 0 60px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge-wrap {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      border: 1px solid rgba(99, 102, 241, 0.25);
      box-shadow: var(--shadow-sm);
      margin-bottom: 20px;
    }

    .hero-badge-tag {
      background: var(--gradient-brand);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: var(--radius-full);
      text-transform: uppercase;
    }

    .hero-badge-text {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.8px;
    }

    .hero-title .text-gradient {
      background: var(--gradient-brand);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 30px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      border-top: 1px dashed var(--border-color);
      padding-top: 24px;
    }

    .hero-stat-item h3 {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.1;
    }

    .hero-stat-item p {
      font-size: 0.85rem;
      color: var(--text-light);
      font-weight: 600;
    }

    /* 首屏右侧纯CSS科技仪表卡片 */
    .hero-board {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(99, 102, 241, 0.2);
      box-shadow: var(--shadow-lg);
      padding: 28px;
      position: relative;
    }

    .hero-board-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 20px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border-color);
    }

    .board-indicator {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .status-dot {
      width: 10px;
      height: 10px;
      background: #10b981;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
    }

    .board-title {
      font-weight: 800;
      font-size: 1rem;
      color: var(--text-main);
    }

    .board-badge {
      font-size: 0.78rem;
      background: rgba(236, 72, 153, 0.1);
      color: var(--secondary-pink);
      padding: 3px 10px;
      border-radius: var(--radius-full);
      font-weight: 700;
    }

    .board-stream-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .stream-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: var(--bg-card-alt);
      padding: 12px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .stream-info {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .stream-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.85rem;
      color: #fff;
    }

    .icon-video { background: linear-gradient(135deg, #f43f5e, #e11d48); }
    .icon-image { background: linear-gradient(135deg, #8b5cf6, #6366f1); }
    .icon-doc { background: linear-gradient(135deg, #06b6d4, #0284c7); }
    .icon-api { background: linear-gradient(135deg, #f59e0b, #d97706); }

    .stream-text strong {
      display: block;
      font-size: 0.92rem;
      color: var(--text-main);
    }

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

    .stream-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--primary);
      background: #ffffff;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      border: 1px solid rgba(99, 102, 241, 0.2);
    }

    /* Section 通用规范 */
    section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: #ffffff;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }

    .section-pill {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 800;
      text-transform: uppercase;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid rgba(99, 102, 241, 0.2);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

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

    /* 卡片网格通用 */
    .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;
    }

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

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.3);
    }

    /* AIGC 支持平台标签云 */
    .platform-tags-wrap {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 30px;
      text-align: center;
    }

    .platform-tags-title {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 18px;
    }

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

    .tag-pill {
      background: var(--bg-card-alt);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-main);
      transition: var(--transition);
    }

    .tag-pill:hover {
      background: var(--gradient-brand);
      color: #ffffff;
      border-color: transparent;
      transform: scale(1.05);
    }

    /* 一站式制作卡片流 */
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--gradient-brand);
      opacity: 0;
      transition: var(--transition);
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.35);
    }

    .feature-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 12px;
    }

    .feature-title {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .feature-tag {
      font-size: 0.75rem;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: var(--radius-full);
      font-weight: 700;
    }

    .feature-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

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

    .step-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-brand);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      margin: 0 auto 16px;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 800;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* 对比评测版块 */
    .benchmark-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .benchmark-top {
      background: linear-gradient(135deg, rgba(79,70,229,0.06), rgba(236,72,153,0.06));
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      flex-wrap: wrap;
      gap: 16px;
    }

    .benchmark-score-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .benchmark-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .benchmark-score {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .benchmark-score span {
      font-size: 1rem;
      color: var(--text-light);
      font-weight: 600;
    }

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

    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .benchmark-table th,
    .benchmark-table td {
      padding: 16px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

    .benchmark-table th {
      background: var(--bg-card-alt);
      font-weight: 800;
      color: var(--text-main);
    }

    .benchmark-table td:nth-child(2) {
      background: rgba(99, 102, 241, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

    .badge-check {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #10b981;
      font-weight: 800;
    }

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

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

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: var(--bg-card-alt);
      overflow: hidden;
    }

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

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

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

    .case-tag {
      font-size: 0.75rem;
      color: var(--secondary-pink);
      font-weight: 800;
      margin-bottom: 6px;
    }

    .case-title {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 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(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #f59e0b;
      margin-bottom: 12px;
      font-size: 0.9rem;
    }

    .review-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--gradient-brand);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.9rem;
    }

    .author-info h4 {
      font-size: 0.92rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    /* 表单与需求匹配 */
    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 40px;
    }

    .form-info-title {
      font-size: 1.6rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .form-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 24px;
    }

    .form-info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    .form-info-item svg {
      flex-shrink: 0;
      margin-top: 3px;
      color: var(--primary);
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

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

    .form-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

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

    /* FAQ 折叠面板 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 1rem;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      transition: var(--transition);
    }

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

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      transition: transform 0.3s;
    }

    .faq-answer {
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      display: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .faq-item.open .faq-answer {
      display: block;
    }

    .faq-item.open .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 行业资讯 / 文章短代码渲染区 */
    .articles-box {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .articles-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 20px;
    }

    .article-link-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 16px;
      background: var(--bg-card-alt);
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.9rem;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .article-link-item:hover {
      background: #ffffff;
      border-color: var(--primary);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 联系与客服二维码区 */
    .contact-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
      align-items: stretch;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 24px;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .qr-container {
      width: 140px;
      height: 140px;
      padding: 8px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin: 14px 0;
      box-shadow: var(--shadow-sm);
    }

    .qr-container img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }

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

    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h3 {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      line-height: 1.6;
    }

    .footer-col h4 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .footer-col ul li a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

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

    /* 友情链接区 */
    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding: 20px 0;
      margin-bottom: 20px;
    }

    .friend-links-title {
      font-size: 0.88rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

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

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* 悬浮快捷客服 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }

    .floating-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.1);
    }

    /* 响应式断点适配 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-3,
      .case-grid,
      .reviews-grid,
      .contact-card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4,
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-layout {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }

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

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        display: block;
        padding: 12px 16px;
      }

      .mobile-menu-btn {
        display: block;
      }

      .hero-title {
        font-size: 2rem;
      }

      .grid-3,
      .grid-4,
      .grid-2,
      .case-grid,
      .reviews-grid,
      .steps-grid,
      .articles-links-grid,
      .contact-card-grid {
        grid-template-columns: 1fr;
      }

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

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }