* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --brand-pink: #ff3d6e;
      --brand-blue: #2a5bff;
      --brand-yellow: #ffcd1e;
      --brand-green: #00c48b;
      --dark-text: #12172b;
      --gray-text: #4a5064;
      --light-bg: #f8f9ff;
      --card-bg: #ffffff;
      --border-light: #eef0f8;
      --shadow-sm: 0 8px 24px rgba(18, 23, 43, 0.05);
      --shadow-md: 0 16px 48px rgba(18, 23, 43, 0.08);
      --shadow-lg: 0 24px 64px rgba(18, 23, 43, 0.12);
      --radius-sm: 12px;
      --radius-md: 20px;
      --radius-lg: 28px;
      --container-max: 1200px;
      --container-pad: 24px;
      --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background: #ffffff;
      color: var(--dark-text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 var(--container-pad);
    }
    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-light);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      gap: 20px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-shrink: 0;
      text-decoration: none;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
      flex-wrap: wrap;
    }
    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--gray-text);
      text-decoration: none;
      border-radius: 8px;
      transition: var(--transition);
    }
    .nav-links li a:hover {
      color: var(--brand-pink);
      background: rgba(255, 61, 110, 0.06);
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 60px;
      font-size: 15px;
      font-weight: 600;
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-primary {
      background: var(--brand-pink);
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(255, 61, 110, 0.3);
    }
    .btn-primary:hover {
      background: #e6335f;
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(255, 61, 110, 0.4);
    }
    .btn-outline {
      background: transparent;
      color: var(--dark-text);
      border: 2px solid var(--border-light);
    }
    .btn-outline:hover {
      border-color: var(--brand-pink);
      color: var(--brand-pink);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      flex-direction: column;
      gap: 5px;
    }
    .mobile-toggle span {
      display: block;
      width: 26px;
      height: 3px;
      background: var(--dark-text);
      border-radius: 4px;
      transition: var(--transition);
    }
    /* Hero 首屏 */
    .hero {
      position: relative;
      padding: 80px 0 100px;
      background: linear-gradient(145deg, #fff5f7 0%, #f5f7ff 40%, #fffdf2 100%);
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -120px;
      right: -120px;
      width: 480px;
      height: 480px;
      background: radial-gradient(circle, rgba(255, 61, 110, 0.08) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -100px;
      left: -80px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(42, 91, 255, 0.06) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-inner {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 820px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 61, 110, 0.08);
      border: 1px solid rgba(255, 61, 110, 0.18);
      padding: 6px 18px;
      border-radius: 60px;
      font-size: 13px;
      font-weight: 500;
      color: var(--brand-pink);
      margin-bottom: 24px;
      animation: fadeUp 0.8s ease both;
    }
    .hero h1 {
      font-size: clamp(32px, 5.5vw, 56px);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -1px;
      margin-bottom: 20px;
      color: var(--dark-text);
      animation: fadeUp 0.8s 0.1s ease both;
    }
    .hero h1 .highlight {
      background: linear-gradient(135deg, var(--brand-pink), #ff6b8a);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-sub {
      font-size: 17px;
      color: var(--gray-text);
      max-width: 600px;
      margin-bottom: 36px;
      line-height: 1.75;
      animation: fadeUp 0.8s 0.2s ease both;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      justify-content: center;
      animation: fadeUp 0.8s 0.3s ease both;
    }
    .btn-hero {
      padding: 14px 36px;
      font-size: 16px;
      border-radius: 60px;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px 48px;
      margin-top: 56px;
      animation: fadeUp 0.8s 0.4s ease both;
    }
    .hero-stat-item {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 2px;
    }
    .hero-stat-item .num {
      font-size: 28px;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
    }
    .hero-stat-item .label {
      font-size: 13px;
      color: var(--gray-text);
      font-weight: 500;
    }
    @keyframes fadeUp {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }
    /* 通用 section */
    .section {
      padding: 80px 0;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 56px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-pink);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 12px;
      background: rgba(255, 61, 110, 0.06);
      padding: 4px 16px;
      border-radius: 60px;
    }
    .section-title {
      font-size: clamp(26px, 3.6vw, 40px);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--gray-text);
      line-height: 1.75;
    }
    /* 关于我们 + 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: start;
    }
    .about-content h2 {
      font-size: 30px;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .about-content p {
      font-size: 15px;
      color: var(--gray-text);
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .about-highlights {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
    }
    .about-highlights span {
      display: inline-block;
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 8px 18px;
      border-radius: 60px;
      font-size: 13px;
      font-weight: 500;
      color: var(--dark-text);
      transition: var(--transition);
    }
    .about-highlights span:hover {
      border-color: var(--brand-pink);
      box-shadow: var(--shadow-sm);
      transform: translateY(-2px);
    }
    .about-visual {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .visual-card {
      flex: 1 1 40%;
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px 20px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition);
      min-width: 140px;
    }
    .visual-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .visual-card .num-big {
      font-size: 32px;
      font-weight: 800;
      color: var(--brand-pink);
      margin-bottom: 4px;
    }
    .visual-card .label {
      font-size: 13px;
      color: var(--gray-text);
      font-weight: 500;
    }
    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--brand-pink);
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.4s ease;
    }
    .service-card:hover::before {
      transform: scaleX(1);
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: transparent;
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 16px;
      background: rgba(255, 61, 110, 0.08);
      color: var(--brand-pink);
    }
    .service-card:nth-child(2) .service-icon { background: rgba(42, 91, 255, 0.08); color: var(--brand-blue); }
    .service-card:nth-child(3) .service-icon { background: rgba(255, 205, 30, 0.12); color: #b88f00; }
    .service-card:nth-child(4) .service-icon { background: rgba(0, 196, 139, 0.08); color: #009e6f; }
    .service-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .service-card p {
      font-size: 13px;
      color: var(--gray-text);
      line-height: 1.65;
    }
    /* 一站式制作流程 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      counter-reset: step;
    }
    .step-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 32px 24px 28px;
      border: 1px solid var(--border-light);
      position: relative;
      transition: var(--transition);
      counter-increment: step;
    }
    .step-card::before {
      content: counter(step, decimal-leading-zero);
      position: absolute;
      top: 16px;
      right: 20px;
      font-size: 40px;
      font-weight: 800;
      color: rgba(255, 61, 110, 0.08);
      line-height: 1;
    }
    .step-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--dark-text);
    }
    .step-card p {
      font-size: 13px;
      color: var(--gray-text);
      line-height: 1.65;
    }
    /* 对比评测 */
    .compare-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      background: #ffffff;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 780px;
      font-size: 14px;
    }
    .compare-table thead {
      background: #fafbff;
    }
    .compare-table th {
      padding: 18px 20px;
      text-align: left;
      font-weight: 600;
      color: var(--dark-text);
      border-bottom: 1px solid var(--border-light);
      white-space: nowrap;
    }
    .compare-table td {
      padding: 16px 20px;
      color: var(--gray-text);
      border-bottom: 1px solid var(--border-light);
      vertical-align: middle;
    }
    .compare-table tbody tr:last-child td {
      border-bottom: none;
    }
    .compare-table tbody tr:hover {
      background: #fafbff;
    }
    .rating-stars {
      color: #ffb800;
      letter-spacing: 2px;
      font-size: 16px;
    }
    .compare-score {
      font-weight: 800;
      font-size: 20px;
      color: var(--brand-pink);
    }
    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-light);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .case-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .case-img {
      width: 100%;
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: #f5f7ff;
    }
    .case-img img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-img img {
      transform: scale(1.03);
    }
    .case-info {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .case-info h3 {
      font-size: 16px;
      font-weight: 700;
    }
    .case-info p {
      font-size: 13px;
      color: var(--gray-text);
      line-height: 1.65;
    }
    .case-tag {
      display: inline-block;
      font-size: 11px;
      font-weight: 600;
      color: var(--brand-pink);
      background: rgba(255, 61, 110, 0.06);
      padding: 2px 12px;
      border-radius: 60px;
      align-self: flex-start;
    }
    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border: 1px solid var(--border-light);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #ffb800;
      font-size: 14px;
      letter-spacing: 2px;
    }
    .review-text {
      font-size: 14px;
      color: var(--gray-text);
      line-height: 1.75;
      flex: 1;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      padding-top: 8px;
      border-top: 1px solid var(--border-light);
    }
    .review-avatar {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--brand-pink), #ff8a9f);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      color: #ffffff;
      flex-shrink: 0;
    }
    .review-user-info {
      display: flex;
      flex-direction: column;
      gap: 1px;
    }
    .review-user-info strong {
      font-size: 13px;
      font-weight: 600;
      color: var(--dark-text);
    }
    .review-user-info span {
      font-size: 12px;
      color: var(--gray-text);
    }
    /* 价格参考 / Token比价 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .price-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 32px 24px;
      border: 1px solid var(--border-light);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 12px;
      position: relative;
    }
    .price-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .price-card.featured {
      border-color: var(--brand-pink);
      box-shadow: 0 12px 40px rgba(255, 61, 110, 0.12);
    }
    .price-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--brand-pink);
      color: #ffffff;
      font-size: 11px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 60px;
    }
    .price-card h3 {
      font-size: 18px;
      font-weight: 700;
    }
    .price-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--brand-pink);
      letter-spacing: -0.5px;
    }
    .price-num small {
      font-size: 14px;
      font-weight: 500;
      color: var(--gray-text);
    }
    .price-card ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-top: 4px;
    }
    .price-card ul li {
      font-size: 13px;
      color: var(--gray-text);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .price-card ul li::before {
      content: '✓';
      color: var(--brand-green);
      font-weight: 700;
      font-size: 14px;
    }
    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: rgba(255, 61, 110, 0.3);
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 15px;
      font-weight: 600;
      color: var(--dark-text);
      text-align: left;
      cursor: pointer;
      transition: var(--transition);
    }
    .faq-question:hover {
      color: var(--brand-pink);
    }
    .faq-icon {
      width: 24px;
      height: 24px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      color: var(--brand-pink);
      transition: transform 0.3s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 24px;
    }
    .faq-item.active .faq-answer {
      max-height: 320px;
      padding: 0 24px 20px;
    }
    .faq-answer p {
      font-size: 14px;
      color: var(--gray-text);
      line-height: 1.75;
    }
    /* 文章列表 + 友情链接 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .article-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: var(--brand-pink);
    }
    .article-card h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
    }
    .article-card p {
      font-size: 13px;
      color: var(--gray-text);
      line-height: 1.65;
    }
    .article-card .link {
      font-size: 13px;
      font-weight: 600;
      color: var(--brand-pink);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: 4px;
    }
    .article-card .link:hover {
      text-decoration: underline;
    }
    /* 表单 */
    .form-section {
      background: linear-gradient(160deg, #fff5f7 0%, #f5f7ff 100%);
      border-radius: var(--radius-lg);
      padding: 56px 40px;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1.6fr;
      gap: 48px;
      align-items: start;
    }
    .form-info h2 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .form-info p {
      font-size: 15px;
      color: var(--gray-text);
      line-height: 1.75;
      margin-bottom: 24px;
    }
    .form-contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .form-contact-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--gray-text);
    }
    .form-contact-list li strong {
      color: var(--dark-text);
      font-weight: 600;
    }
    .form-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 36px 32px;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(255, 61, 110, 0.08);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }
    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
      margin-bottom: 16px;
    }
    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--dark-text);
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border-radius: 10px;
      border: 1px solid var(--border-light);
      background: #fafbff;
      font-family: inherit;
      font-size: 14px;
      color: var(--dark-text);
      transition: var(--transition);
      outline: none;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--brand-pink);
      box-shadow: 0 0 0 3px rgba(255, 61, 110, 0.1);
      background: #ffffff;
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    /* 页脚 */
    .site-footer {
      background: #12172b;
      color: #cdd3e4;
      padding: 56px 0 28px;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .footer-brand img {
      height: 36px;
      width: auto;
      margin-bottom: 16px;
    }
    .footer-brand p {
      font-size: 13px;
      line-height: 1.75;
      color: #9ea5be;
    }
    .footer-col h4 {
      font-size: 14px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-col ul li a {
      font-size: 13px;
      color: #9ea5be;
      text-decoration: none;
      transition: var(--transition);
    }
    .footer-col ul li a:hover {
      color: #ffffff;
    }
    .footer-qrcode {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-qrcode img {
      width: 100px;
      height: 100px;
      object-fit: contain;
      border-radius: 8px;
      background: #ffffff;
      padding: 6px;
    }
    .footer-qrcode span {
      font-size: 12px;
      color: #9ea5be;
    }
    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      padding-top: 24px;
      font-size: 12px;
      color: #7d84a0;
    }
    .footer-bottom a {
      color: #9ea5be;
      text-decoration: none;
    }
    .footer-bottom a:hover {
      color: #ffffff;
    }
    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 90;
      display: flex;
      flex-direction: column;
      gap: 10px;
      align-items: center;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      box-shadow: 0 8px 32px rgba(18, 23, 43, 0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid var(--border-light);
      font-size: 20px;
      color: var(--dark-text);
      text-decoration: none;
    }
    .float-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 40px rgba(18, 23, 43, 0.2);
      color: var(--brand-pink);
      border-color: var(--brand-pink);
    }
    .float-qr-pop {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      border-radius: var(--radius-sm);
      padding: 12px;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-light);
    }
    .float-qr-pop img {
      display: block;
      width: 120px;
      height: 120px;
      object-fit: contain;
    }
    .float-btn-wrap {
      position: relative;
    }
    .float-btn-wrap:hover .float-qr-pop {
      display: block;
    }
    .back-top {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 90;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--brand-pink);
      color: #ffffff;
      border: none;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(255, 61, 110, 0.35);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      transition: var(--transition);
      opacity: 0;
      pointer-events: none;
      transform: translateY(8px);
    }
    .back-top.show {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }
    .back-top:hover {
      background: #e6335f;
      transform: translateY(-2px);
    }
    /* 滚动渐入 */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 32px;
    }
    .tag-cloud span {
      display: inline-block;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: 60px;
      font-size: 12px;
      color: var(--gray-text);
      transition: var(--transition);
      cursor: default;
    }
    .tag-cloud span:hover {
      border-color: var(--brand-pink);
      color: var(--brand-pink);
      background: rgba(255, 61, 110, 0.04);
      transform: translateY(-2px);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .price-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
      .about-grid { grid-template-columns: 1fr; gap: 32px; }
      .form-grid { grid-template-columns: 1fr; gap: 32px; }
    }
    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 24px;
        gap: 2px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: var(--shadow-md);
        align-items: flex-start;
      }
      .nav-links.open {
        display: flex;
      }
      .nav-links li { width: 100%; }
      .nav-links li a { display: block; padding: 10px 12px; width: 100%; }
      .mobile-toggle { display: flex; }
      .nav-cta .btn-outline { display: none; }
      .hero { padding: 56px 0 64px; }
      .hero-sub { font-size: 15px; }
      .hero-stats { gap: 12px 28px; }
      .hero-stat-item .num { font-size: 22px; }
      .services-grid { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: 1fr; }
      .price-grid { grid-template-columns: 1fr; }
      .cases-grid { grid-template-columns: 1fr; }
      .articles-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .form-section { padding: 36px 20px; }
      .form-box { padding: 24px 20px; }
      .form-row { grid-template-columns: 1fr; }
      .section { padding: 56px 0; }
      .section-header { margin-bottom: 36px; }
      .about-visual { flex-direction: column; }
      .visual-card { flex: 1 1 auto; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .float-service { right: 12px; bottom: 72px; }
    }
    @media (max-width: 480px) {
      :root { --container-pad: 16px; }
      .hero h1 { font-size: 28px; }
      .hero-actions { flex-direction: column; width: 100%; }
      .btn-hero { width: 100%; }
      .section-title { font-size: 24px; }
      .compare-table { min-width: 620px; }
      .form-section { padding: 28px 16px; }
      .form-box { padding: 20px 16px; }
      .price-card { padding: 24px 18px; }
      .review-card { padding: 20px 18px; }
    }