:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --primary-light: #EEF2FF;
      --rainbow-1: #FF4B72;
      --rainbow-2: #FF8F3D;
      --rainbow-3: #FBBF24;
      --rainbow-4: #10B981;
      --rainbow-5: #06B6D4;
      --rainbow-6: #6366F1;
      --rainbow-7: #A855F7;
      --rainbow-gradient: linear-gradient(135deg, #FF4B72 0%, #FF8F3D 18%, #FBBF24 36%, #10B981 54%, #06B6D4 72%, #6366F1 88%, #A855F7 100%);
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --bg-base: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-alt: #F1F5F9;
      --border-color: #E2E8F0;
      --border-focus: #CBD5E1;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.07);
      --shadow-lg: 0 10px 25px -3px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 16px 32px -4px rgba(79, 70, 229, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --container-max: 1200px;
      --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }

    *, *::before, *::after {
      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-base);
      color: var(--text-body);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    ul, ol {
      list-style: none;
    }

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

    .section-wrap {
      padding: 72px 0;
      position: relative;
    }

    .section-wrap.alt-bg {
      background-color: #FFFFFF;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px auto;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
      background: var(--primary-light);
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid rgba(79, 70, 229, 0.15);
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 顶部彩虹装饰线 */
    .rainbow-bar {
      height: 4px;
      width: 100%;
      background: var(--rainbow-gradient);
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

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

    .logo-box .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      background: linear-gradient(120deg, #1E293B, #4F46E5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--text-body);
      border-radius: var(--radius-sm);
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      font-size: 0.9375rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      color: #FFFFFF;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(79, 70, 229, 0.35);
    }

    .btn-rainbow {
      background: var(--rainbow-gradient);
      color: #FFFFFF;
      background-size: 200% 200%;
      box-shadow: 0 4px 15px rgba(255, 75, 114, 0.25);
    }

    .btn-rainbow:hover {
      color: #FFFFFF;
      background-position: right center;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(99, 102, 241, 0.35);
    }

    .btn-outline {
      background: #FFFFFF;
      color: var(--text-main);
      border-color: var(--border-color);
    }

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

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      padding: 6px;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero（无图片，纯CSS与多彩几何质感） */
    .hero-section {
      padding: 76px 0 64px 0;
      background: radial-gradient(circle at 10% 20%, rgba(255, 75, 114, 0.04) 0%, transparent 40%),
                  radial-gradient(circle at 90% 10%, rgba(6, 182, 212, 0.05) 0%, transparent 45%),
                  radial-gradient(circle at 50% 90%, rgba(168, 85, 247, 0.05) 0%, transparent 50%),
                  var(--bg-base);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-inner {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #FFFFFF;
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background: var(--rainbow-4);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }

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

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-body);
      max-width: 780px;
      margin: 0 auto 32px auto;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-bottom: 40px;
      flex-wrap: wrap;
    }

    .hero-tags {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 10px;
      padding-top: 16px;
      border-top: 1px dashed var(--border-color);
    }

    .hero-tag-item {
      display: inline-flex;
      align-items: center;
      padding: 4px 12px;
      font-size: 0.8125rem;
      color: var(--text-muted);
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    /* 数据指标区 */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

    .stat-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--rainbow-gradient);
      opacity: 0;
      transition: var(--transition);
    }

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

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

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 服务与能力网格 */
    .feature-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: rgba(79, 70, 229, 0.4);
      box-shadow: var(--shadow-hover);
    }

    .feature-icon-badge {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }

    .icon-1 { background: linear-gradient(135deg, #FF4B72, #FF8F3D); }
    .icon-2 { background: linear-gradient(135deg, #FF8F3D, #FBBF24); }
    .icon-3 { background: linear-gradient(135deg, #10B981, #06B6D4); }
    .icon-4 { background: linear-gradient(135deg, #06B6D4, #6366F1); }
    .icon-5 { background: linear-gradient(135deg, #6366F1, #A855F7); }
    .icon-6 { background: linear-gradient(135deg, #A855F7, #FF4B72); }

    .feature-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 0.925rem;
      color: var(--text-body);
      flex-grow: 1;
      margin-bottom: 14px;
    }

    .feature-meta {
      font-size: 0.8125rem;
      color: var(--primary);
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* 多模型生态徽章标签 */
    .model-badge-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      padding: 8px 16px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }

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

    /* 案例与素材展示 */
    .media-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 24px;
    }

    .media-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
    }

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

    .media-img-wrap.square-ratio {
      aspect-ratio: 1 / 1;
      max-height: 380px;
    }

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

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

    .media-body {
      padding: 20px 24px;
    }

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

    .media-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 标准流程时间线 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

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

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--rainbow-gradient);
      color: #FFFFFF;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 对比评测表格板块 */
    .compare-container {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .compare-header-box {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      background: #FFFBEB;
      border: 1px solid #FDE68A;
      padding: 10px 20px;
      border-radius: var(--radius-md);
    }

    .rating-stars {
      color: #F59E0B;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

    .rating-score {
      font-size: 1.3rem;
      font-weight: 800;
      color: #92400E;
    }

    .compare-table-wrap {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 18px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.9375rem;
    }

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

    .compare-table .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 用户评论卡片 */
    .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;
      transition: var(--transition);
    }

    .review-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .review-text {
      font-size: 0.925rem;
      color: var(--text-body);
      margin-bottom: 18px;
      line-height: 1.7;
    }

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

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--rainbow-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #FFFFFF;
      font-weight: 700;
      font-size: 0.95rem;
    }

    .reviewer-name {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

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

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

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      user-select: none;
    }

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

    .faq-toggle-icon {
      width: 24px;
      height: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      background: #FAFAFC;
    }

    .faq-answer-inner {
      padding: 0 22px 20px 22px;
      font-size: 0.925rem;
      color: var(--text-body);
      line-height: 1.7;
    }

    /* 需求表单与联系我们 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 32px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .contact-info-side {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .info-list {
      display: flex;
      flex-direction: column;
      gap: 18px;
      margin: 20px 0;
    }

    .info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .info-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      flex-shrink: 0;
    }

    .info-label {
      font-size: 0.8125rem;
      color: var(--text-muted);
    }

    .info-val {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .qr-box-wrap {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: var(--bg-alt);
      border-radius: var(--radius-md);
      border: 1px dashed var(--border-color);
    }

    .qr-box-wrap img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      object-fit: cover;
      background: #FFFFFF;
      padding: 4px;
      border: 1px solid var(--border-color);
    }

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

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

    .form-group label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 11px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.9375rem;
      color: var(--text-main);
      background-color: #FFFFFF;
      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(79, 70, 229, 0.15);
    }

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

    /* 行业资讯与动态文章 */
    .article-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }

    .article-chip-link {
      padding: 8px 16px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.875rem;
      color: var(--text-body);
      font-weight: 500;
      transition: var(--transition);
    }

    .article-chip-link:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 友情链接与页脚体系 */
    .friend-links-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      margin-bottom: 40px;
    }

    .friend-links-title {
      font-size: 0.9375rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

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

    .friend-links-list a {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    .site-footer {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 56px 0 32px 0;
      border-top: 1px solid #1E293B;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 18px;
    }

    .footer-nav-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-nav-list a {
      color: #94A3B8;
      font-size: 0.875rem;
    }

    .footer-nav-list a:hover {
      color: #FFFFFF;
    }

    .footer-bottom-bar {
      padding-top: 24px;
      border-top: 1px solid #1E293B;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.8125rem;
    }

    .footer-bottom-bar a {
      color: #94A3B8;
    }

    .footer-bottom-bar a:hover {
      color: #FFFFFF;
    }

    /* 悬浮工具栏 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      cursor: pointer;
      font-size: 1.1rem;
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
      transform: scale(1.08);
    }

    /* 动画 */
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.85); }
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .feature-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .feature-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow-steps { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-grid { grid-template-columns: 1fr; }
      .nav-links { display: none; }
      .mobile-toggle { display: block; }
    }

    @media (max-width: 640px) {
      .section-wrap { padding: 48px 0; }
      .hero-title { font-size: 1.95rem; }
      .feature-grid-4, .feature-grid-3, .stats-grid, .workflow-steps, .reviews-grid, .media-grid-2, .footer-grid {
        grid-template-columns: 1fr;
      }
      .compare-container { padding: 20px 14px; }
      .contact-grid { padding: 20px 16px; }
      .footer-bottom-bar { flex-direction: column; text-align: center; }
    }