/* 基础重置与变量 */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --green-bright: #22c55e;
      --green-deep: #16a34a;
      --green-dark: #14532d;
      --green-soft: #dcfce7;
      --green-glow: #bbf7d0;
      --ink-900: #0f172a;
      --ink-700: #1e293b;
      --ink-500: #475569;
      --ink-400: #64748b;
      --ink-300: #94a3b8;
      --bg-page: #f7fdf9;
      --bg-card: #ffffff;
      --bg-soft: #f0fdf4;
      --border-light: #e2e8f0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 28px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 10px 30px -10px rgba(16, 185, 129, 0.18);
      --shadow-lg: 0 24px 48px -16px rgba(22, 163, 74, 0.22);
      --font-system: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
    }

    body {
      font-family: var(--font-system);
      background-color: var(--bg-page);
      color: var(--ink-700);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    h1, h2, h3, h4 {
      font-weight: 700;
      line-height: 1.25;
      color: var(--ink-900);
      letter-spacing: -0.02em;
    }

    h1 { font-size: clamp(2rem, 5vw, 3.6rem); }
    h2 { font-size: clamp(1.6rem, 3.4vw, 2.4rem); }
    h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }

    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; height: auto; display: block; }
    ul { list-style: none; }

    /* 容器 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 通用按钮 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 60px;
      font-weight: 600;
      font-size: 1rem;
      background: var(--green-bright);
      color: #ffffff;
      border: none;
      cursor: pointer;
      transition: all 0.25s ease;
      box-shadow: 0 6px 18px -4px rgba(34, 197, 94, 0.4);
      white-space: nowrap;
    }
    .btn:hover {
      background: var(--green-deep);
      transform: translateY(-2px);
      box-shadow: 0 12px 28px -6px rgba(22, 163, 74, 0.5);
    }
    .btn-outline {
      background: transparent;
      color: var(--green-deep);
      border: 2px solid var(--green-bright);
      box-shadow: none;
    }
    .btn-outline:hover {
      background: var(--green-soft);
      color: var(--green-dark);
    }
    .btn-sm { padding: 10px 22px; font-size: 0.9rem; }

    /* 顶部导航 */
    .site-header {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(34, 197, 94, 0.12);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 72px;
      flex-wrap: wrap;
      gap: 12px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .brand .ai-page-logo {
      max-width: 120px;
      height: auto;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 14px;
      font-size: 0.94rem;
      font-weight: 500;
      color: var(--ink-700);
      border-radius: 40px;
      transition: background 0.2s, color 0.2s;
      white-space: nowrap;
    }
    .nav-links a:hover {
      background: var(--green-soft);
      color: var(--green-dark);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-light);
      border-radius: 8px;
      padding: 8px 12px;
      font-size: 1.4rem;
      line-height: 1;
      color: var(--ink-700);
      cursor: pointer;
    }

    /* 首屏 Hero - 无图片 */
    .hero {
      position: relative;
      padding: 64px 0 56px;
      background: radial-gradient(circle at 80% 20%, rgba(34, 197, 94, 0.12) 0%, transparent 55%),
                  linear-gradient(145deg, #f0fdf4 0%, #ffffff 60%, #ecfdf5 100%);
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: 
        radial-gradient(circle at 10% 80%, rgba(34, 197, 94, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 30%, rgba(16, 185, 129, 0.1) 0%, transparent 50%);
      pointer-events: none;
    }
    .hero-grid {
      position: relative;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
    }
    .hero-content {
      position: relative;
      z-index: 1;
    }
    .hero-badge {
      display: inline-block;
      background: var(--green-soft);
      color: var(--green-dark);
      font-weight: 600;
      font-size: 0.85rem;
      padding: 6px 18px;
      border-radius: 40px;
      letter-spacing: 0.3px;
      margin-bottom: 20px;
      border: 1px solid rgba(34, 197, 94, 0.2);
    }
    .hero h1 {
      margin-bottom: 20px;
      color: var(--ink-900);
      font-size: clamp(2rem, 5vw, 3.4rem);
    }
    .hero h1 span {
      color: var(--green-deep);
      background: linear-gradient(120deg, #16a34a, #22c55e);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero p {
      font-size: 1.15rem;
      color: var(--ink-500);
      max-width: 520px;
      margin-bottom: 32px;
    }
    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }
    .hero-stats {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      padding-top: 8px;
    }
    .hero-stat-item {
      display: flex;
      flex-direction: column;
    }
    .hero-stat-item strong {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--green-deep);
      line-height: 1.2;
    }
    .hero-stat-item span {
      font-size: 0.9rem;
      color: var(--ink-400);
    }

    /* 右侧视觉抽象卡片 */
    .hero-visual {
      position: relative;
      display: flex;
      flex-direction: column;
      gap: 16px;
      z-index: 1;
    }
    .visual-card {
      background: rgba(255, 255, 255, 0.7);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.9);
      border-radius: var(--radius-lg);
      padding: 20px 24px;
      box-shadow: 0 20px 40px -12px rgba(22, 163, 74, 0.2);
      transition: transform 0.3s ease;
      animation: floatSoft 6s ease-in-out infinite;
    }
    .visual-card:nth-child(2) { animation-delay: 1.5s; }
    .visual-card:nth-child(3) { animation-delay: 3s; }
    .visual-card:hover { transform: translateY(-4px); }
    .visual-card .tag {
      display: inline-block;
      background: var(--green-soft);
      color: var(--green-dark);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 2px 12px;
      border-radius: 20px;
      margin-bottom: 8px;
    }
    .visual-card p {
      font-size: 0.95rem;
      margin-bottom: 0;
      color: var(--ink-700);
    }
    .visual-card .highlight {
      font-weight: 700;
      color: var(--green-deep);
    }
    @keyframes floatSoft {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }

    /* 通用区块 */
    .section {
      padding: 72px 0;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-header h2 {
      margin-bottom: 16px;
    }
    .section-header p {
      color: var(--ink-400);
      font-size: 1.05rem;
    }
    .bg-soft {
      background: var(--bg-soft);
    }

    /* 关于我们 / 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }
    .about-text p {
      margin-bottom: 16px;
      color: var(--ink-500);
    }
    .about-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }
    .about-tags span {
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 6px 16px;
      border-radius: 40px;
      font-size: 0.85rem;
      font-weight: 500;
      color: var(--ink-700);
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .about-tags span:hover {
      border-color: var(--green-bright);
      box-shadow: 0 4px 10px rgba(34, 197, 94, 0.12);
    }
    .about-highlight {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      border-left: 6px solid var(--green-bright);
    }
    .about-highlight h3 {
      margin-bottom: 16px;
    }
    .about-highlight ul li {
      display: flex;
      gap: 12px;
      margin-bottom: 12px;
      color: var(--ink-500);
    }
    .about-highlight ul li::before {
      content: "✓";
      color: var(--green-deep);
      font-weight: 800;
    }

    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid rgba(34, 197, 94, 0.1);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--green-glow);
    }
    .service-icon {
      font-size: 1.8rem;
      margin-bottom: 14px;
    }
    .service-card h3 {
      font-size: 1.15rem;
      margin-bottom: 10px;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--ink-400);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-item {
      text-align: center;
      padding: 28px 16px;
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s;
    }
    .step-item:hover { transform: translateY(-4px); }
    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--green-soft);
      color: var(--green-dark);
      font-weight: 800;
      font-size: 1.3rem;
      margin-bottom: 16px;
    }
    .step-item h3 {
      font-size: 1.05rem;
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 0.88rem;
      color: var(--ink-400);
    }

    /* 对比评测 */
    .compare-wrap {
      background: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px 32px;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(34, 197, 94, 0.12);
    }
    .compare-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
      margin-bottom: 32px;
      padding-bottom: 24px;
      border-bottom: 2px dashed var(--border-light);
    }
    .rating-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .rating-stars {
      color: #fbbf24;
      font-size: 1.8rem;
      letter-spacing: 4px;
    }
    .rating-score {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--green-deep);
      line-height: 1;
    }
    .rating-score small {
      font-size: 1rem;
      color: var(--ink-400);
      font-weight: 500;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.95rem;
    }
    .compare-table th {
      text-align: left;
      padding: 14px 16px;
      background: var(--bg-soft);
      font-weight: 700;
      color: var(--ink-900);
      border-bottom: 2px solid var(--green-glow);
    }
    .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid var(--border-light);
      color: var(--ink-500);
      vertical-align: top;
    }
    .compare-table tr:last-child td { border-bottom: none; }
    .compare-table .highlight-col {
      background: rgba(34, 197, 94, 0.06);
      font-weight: 600;
      color: var(--green-dark);
    }
    .compare-note {
      margin-top: 20px;
      font-size: 0.9rem;
      color: var(--ink-400);
      text-align: center;
    }

    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s;
      border: 1px solid var(--border-light);
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
    }
    .case-img-wrap {
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: var(--green-soft);
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }
    .case-info {
      padding: 18px 20px 22px;
    }
    .case-info h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }
    .case-info p {
      font-size: 0.9rem;
      color: var(--ink-400);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(34, 197, 94, 0.08);
      transition: all 0.3s;
    }
    .review-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--green-glow);
    }
    .review-stars {
      color: #fbbf24;
      font-size: 1rem;
      letter-spacing: 2px;
      margin-bottom: 12px;
    }
    .review-text {
      font-size: 0.95rem;
      color: var(--ink-500);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--green-soft);
      color: var(--green-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .review-user-info strong {
      display: block;
      font-size: 0.95rem;
      color: var(--ink-900);
    }
    .review-user-info span {
      font-size: 0.8rem;
      color: var(--ink-400);
    }

    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: var(--green-bright);
      box-shadow: 0 4px 16px rgba(34, 197, 94, 0.1);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      font-weight: 600;
      font-size: 1rem;
      background: none;
      border: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      color: var(--ink-900);
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: var(--bg-soft);
    }
    .faq-icon {
      font-size: 1.3rem;
      color: var(--green-deep);
      transition: transform 0.25s;
      flex-shrink: 0;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.2s;
      padding: 0 24px;
      color: var(--ink-500);
      font-size: 0.95rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    /* 表单 */
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .form-group.full-width {
      grid-column: 1 / -1;
    }
    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--ink-700);
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 12px 16px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: var(--font-system);
      background: #ffffff;
      transition: border-color 0.2s, box-shadow 0.2s;
      color: var(--ink-900);
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--green-bright);
      box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.15);
    }
    .form-group textarea {
      min-height: 100px;
      resize: vertical;
    }
    .form-submit {
      margin-top: 8px;
    }

    /* 最新文章 & 友情链接 */
    .articles-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
      gap: 16px;
    }
    .article-link {
      display: block;
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      padding: 16px 20px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--ink-700);
      transition: all 0.2s;
      text-align: center;
    }
    .article-link:hover {
      background: var(--green-soft);
      border-color: var(--green-bright);
      color: var(--green-dark);
      transform: translateY(-2px);
    }
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 24px;
      justify-content: center;
      margin-top: 16px;
    }
    .friend-links a {
      font-size: 0.9rem;
      color: var(--ink-400);
      transition: color 0.2s;
    }
    .friend-links a:hover {
      color: var(--green-deep);
    }

    /* 页脚 */
    .site-footer {
      background: var(--green-dark);
      color: #d1fae5;
      padding: 48px 0 24px;
      margin-top: 48px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 32px;
    }
    .footer-brand .ai-page-logo {
      max-width: 140px;
      margin-bottom: 16px;
      
    }
    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.7;
      opacity: 0.85;
      max-width: 320px;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      font-size: 0.88rem;
      opacity: 0.8;
      transition: opacity 0.2s;
    }
    .footer-col ul li a:hover {
      opacity: 1;
      color: #ffffff;
    }
    .footer-contact-item {
      font-size: 0.88rem;
      opacity: 0.85;
      margin-bottom: 8px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 20px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 0.82rem;
      opacity: 0.7;
    }
    .footer-bottom a {
      color: #ffffff;
      opacity: 0.9;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 100px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }
    .float-kefu .kefu-btn {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: var(--green-bright);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      box-shadow: 0 8px 24px rgba(34, 197, 94, 0.4);
      cursor: pointer;
      transition: all 0.25s;
      border: none;
    }
    .float-kefu .kefu-btn:hover {
      background: var(--green-deep);
      transform: scale(1.05);
    }
    .kefu-panel {
      display: none;
      width: 200px;
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      padding: 16px;
      text-align: center;
      border: 1px solid var(--border-light);
      position: absolute;
      right: 68px;
      bottom: 0;
    }
    .kefu-panel.show {
      display: block;
      animation: fadeUp 0.25s ease;
    }
    .kefu-panel img {
      width: 140px;
      height: 140px;
      margin: 0 auto 12px;
      border-radius: var(--radius-sm);
      object-fit: cover;
    }
    .kefu-panel p {
      font-size: 0.8rem;
      color: var(--ink-500);
      margin-bottom: 4px;
    }
    .back-top {
      position: fixed;
      right: 24px;
      bottom: 32px;
      z-index: 200;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-light);
      color: var(--ink-700);
      font-size: 1.3rem;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
      opacity: 0;
      visibility: hidden;
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
    }
    .back-top:hover {
      background: var(--green-soft);
      border-color: var(--green-bright);
    }

    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(8px); }
      to { opacity: 1; transform: translateY(0); }
    }

    /* 滚动渐入 */
    .fade-in {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .fade-in.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .hero p { max-width: 100%; }
      .about-grid { grid-template-columns: 1fr; gap: 32px; }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .case-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: stretch;
        padding: 12px 0;
        order: 3;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links a {
        text-align: center;
        padding: 10px 14px;
        white-space: normal;
      }
      .menu-toggle { display: block; }
      .header-inner { justify-content: space-between; }
      .nav-actions .btn { display: none; }

      .hero { padding: 48px 0 40px; }
      .hero-stats { gap: 20px; }
      .hero-stat-item strong { font-size: 1.4rem; }

      .section { padding: 48px 0; }

      .steps-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
      .case-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }

      .compare-wrap { padding: 24px 16px; }
      .compare-table { font-size: 0.82rem; }
      .compare-table th, .compare-table td { padding: 10px 8px; }

      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .footer-bottom { flex-direction: column; text-align: center; }

      .float-kefu { right: 16px; bottom: 88px; }
      .kefu-panel { right: 60px; width: 180px; }
      .kefu-panel img { width: 120px; height: 120px; }
      .back-top { right: 16px; bottom: 24px; }
    }

    @media (max-width: 480px) {
      .container { padding: 0 16px; }
      .steps-grid { grid-template-columns: 1fr; }
      .hero-cta .btn { width: 100%; justify-content: center; }
      .about-tags span { font-size: 0.78rem; padding: 4px 12px; }
      .services-grid { grid-template-columns: 1fr; }
    }

    /* 表格横向滚动容器 */
    .table-scroll {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }
    .tag-cloud span {
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 6px 18px;
      border-radius: 40px;
      font-size: 0.82rem;
      color: var(--ink-500);
      transition: all 0.2s;
    }
    .tag-cloud span:hover {
      border-color: var(--green-bright);
      color: var(--green-dark);
      background: var(--green-soft);
    }