/* 全局重置与基础变量 */
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --brand-red: #d32f2f;
      --brand-red-dark: #b71c1c;
      --brand-red-light: #ffebee;
      --brand-gradient: linear-gradient(135deg, #d32f2f 0%, #b71c1c 100%);
      --text-dark: #1a1a1a;
      --text-medium: #2c2c2c;
      --text-light: #5e5e5e;
      --bg-warm: #fdf8f7;
      --bg-white: #ffffff;
      --border-light: #f0e8e6;
      --shadow-card: 0 8px 28px rgba(211, 47, 47, 0.08);
      --shadow-hover: 0 16px 42px rgba(211, 47, 47, 0.16);
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --container-max: 1200px;
      --font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      background: var(--bg-warm);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 首屏 Hero 无图片 */
    .hero {
      position: relative;
      padding: 80px 0 70px;
      background: radial-gradient(circle at 20% 30%, rgba(211, 47, 47, 0.06) 0%, transparent 40%),
                  radial-gradient(circle at 80% 70%, rgba(211, 47, 47, 0.05) 0%, transparent 40%),
                  linear-gradient(175deg, #fef7f6 0%, #ffffff 90%);
      overflow: hidden;
      border-bottom: 1px solid var(--border-light);
    }

    /* 几何装饰 */
    .hero::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 380px;
      height: 380px;
      background: radial-gradient(circle, rgba(211, 47, 47, 0.06) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero::after {
      content: '';
      position: absolute;
      bottom: -60px;
      left: -60px;
      width: 280px;
      height: 280px;
      background: radial-gradient(circle, rgba(211, 47, 47, 0.04) 0%, transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 24px;
      max-width: 780px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      border: 1px solid rgba(211, 47, 47, 0.2);
      color: var(--brand-red);
      font-size: 14px;
      font-weight: 600;
      padding: 8px 18px;
      border-radius: 40px;
      letter-spacing: 0.3px;
      box-shadow: 0 2px 12px rgba(211, 47, 47, 0.06);
    }

    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--brand-red);
      border-radius: 50%;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.85); }
    }

    .hero h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text-dark);
      letter-spacing: -0.5px;
      max-width: 720px;
    }

    .hero h1 .highlight {
      color: var(--brand-red);
      position: relative;
      display: inline-block;
    }

    .hero p {
      font-size: 18px;
      color: var(--text-light);
      max-width: 620px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 8px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 16px;
      border-radius: 50px;
      padding: 14px 36px;
      border: none;
      cursor: pointer;
      transition: all 0.25s ease;
      text-decoration: none;
      line-height: 1.4;
    }

    .btn-primary {
      background: var(--brand-gradient);
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(211, 47, 47, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #b71c1c 0%, #8e0000 100%);
      box-shadow: 0 12px 32px rgba(211, 47, 47, 0.35);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--text-dark);
      border: 1.5px solid #ddd;
    }

    .btn-outline:hover {
      border-color: var(--brand-red);
      color: var(--brand-red);
      background: #fff;
      box-shadow: 0 8px 20px rgba(211, 47, 47, 0.08);
      transform: translateY(-2px);
    }

    .btn-secondary {
      background: #fff;
      color: var(--brand-red);
      border: 1.5px solid var(--brand-red);
    }

    .btn-secondary:hover {
      background: var(--brand-red-light);
      transform: translateY(-2px);
    }

    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 40px;
      margin-top: 24px;
      padding-top: 24px;
      border-top: 1px solid var(--border-light);
      width: 100%;
    }

    .stat-item {
      display: flex;
      flex-direction: column;
    }

    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--brand-red);
      line-height: 1.3;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-light);
      margin-top: 2px;
    }

    /* 导航 */
    .navbar {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      position: sticky;
      top: 0;
      z-index: 100;
      box-shadow: 0 2px 16px rgba(0, 0, 0, 0.02);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 14px 0;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
      text-decoration: none;
    }

    .nav-brand img {
      height: 38px;
      width: auto;
      display: block;
    }

    .nav-brand span {
      font-weight: 700;
      font-size: 20px;
      color: var(--text-dark);
      letter-spacing: -0.3px;
      white-space: nowrap;
    }

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

    .nav-links a {
      display: inline-block;
      padding: 8px 12px;
      color: var(--text-medium);
      font-size: 14.5px;
      font-weight: 500;
      text-decoration: none;
      border-radius: 6px;
      transition: color 0.2s, background 0.2s;
      white-space: nowrap;
    }

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

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

    .nav-cta .btn {
      padding: 10px 22px;
      font-size: 14px;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1.5px solid #ddd;
      border-radius: 8px;
      padding: 8px 10px;
      cursor: pointer;
      flex-direction: column;
      gap: 4px;
      width: 42px;
      height: 42px;
      align-items: center;
      justify-content: center;
    }

    .menu-toggle span {
      display: block;
      width: 20px;
      height: 2.5px;
      background: var(--text-dark);
      border-radius: 2px;
      transition: all 0.25s;
    }

    /* 通用区块 */
    section {
      padding: 72px 0;
    }

    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 52px;
    }

    .section-header .eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 1.5px;
      text-transform: uppercase;
      color: var(--brand-red);
      background: var(--brand-red-light);
      padding: 6px 16px;
      border-radius: 40px;
      margin-bottom: 16px;
    }

    .section-header h2 {
      font-size: 34px;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.25;
      letter-spacing: -0.3px;
    }

    .section-header p {
      font-size: 17px;
      color: var(--text-light);
      margin-top: 14px;
      line-height: 1.7;
    }

    /* 滚动渐入 */
    .fade-up {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.7s cubic-bezier(0.2, 0.8, 0.2, 1), transform 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
    }

    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 卡片通用 */
    .card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-card);
      border: 1px solid var(--border-light);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    .card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    /* 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }

    .about-text h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 20px;
      line-height: 1.25;
    }

    .about-text p {
      font-size: 16px;
      color: var(--text-light);
      margin-bottom: 16px;
      line-height: 1.8;
    }

    .about-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }

    .about-features li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 15px;
      color: var(--text-medium);
      list-style: none;
    }

    .check-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      background: var(--brand-red-light);
      color: var(--brand-red);
      border-radius: 50%;
      font-size: 12px;
      font-weight: 700;
      flex-shrink: 0;
    }

    /* 服务能力卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 22px;
    }

    .service-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
      transition: all 0.28s ease;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .service-card:hover {
      border-color: rgba(211, 47, 47, 0.25);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .service-icon {
      font-size: 28px;
      line-height: 1;
      margin-bottom: 4px;
    }

    .service-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-dark);
    }

    .service-card p {
      font-size: 14.5px;
      color: var(--text-light);
      line-height: 1.65;
    }

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

    .step-item {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 28px 22px;
      text-align: center;
      position: relative;
      border: 1px solid var(--border-light);
      transition: all 0.28s;
    }

    .step-item:hover {
      border-color: var(--brand-red);
      box-shadow: 0 10px 30px rgba(211, 47, 47, 0.08);
    }

    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      background: var(--brand-red-light);
      color: var(--brand-red);
      font-weight: 800;
      font-size: 18px;
      border-radius: 50%;
      margin-bottom: 14px;
    }

    .step-item h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.6;
    }

    /* 对比表格 */
    .compare-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      background: #fff;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 18px 22px;
      text-align: left;
      border-bottom: 1px solid #f5efed;
      font-size: 15px;
    }

    .compare-table th {
      background: #fef9f8;
      font-weight: 700;
      color: var(--text-dark);
      font-size: 14.5px;
      letter-spacing: 0.3px;
    }

    .compare-table td:first-child {
      font-weight: 600;
      color: var(--text-medium);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .compare-table .highlight-row td {
      background: #fff5f4;
      font-weight: 600;
      color: var(--brand-red);
    }

    .rating-stars {
      color: #f5b342;
      font-size: 16px;
      letter-spacing: 2px;
    }

    /* 案例展示 */
    .case-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 24px;
    }

    .case-card {
      background: #fff;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--border-light);
      transition: all 0.3s;
    }

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

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #f8f1ef;
    }

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

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

    .case-body {
      padding: 22px 24px;
    }

    .case-body h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .case-body p {
      font-size: 14.5px;
      color: var(--text-light);
      line-height: 1.65;
    }

    .case-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }

    .tag {
      font-size: 12.5px;
      padding: 4px 12px;
      background: var(--brand-red-light);
      color: var(--brand-red);
      border-radius: 30px;
      font-weight: 500;
    }

    /* 评论卡片 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
      transition: all 0.28s;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--brand-red-light);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--brand-red);
      font-weight: 700;
      font-size: 16px;
      flex-shrink: 0;
    }

    .review-user-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-dark);
    }

    .review-user-info span {
      font-size: 13px;
      color: var(--text-light);
    }

    .review-stars {
      color: #f5b342;
      font-size: 14px;
      letter-spacing: 1px;
    }

    .review-text {
      font-size: 14.5px;
      color: var(--text-medium);
      line-height: 1.7;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #fff;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item:hover {
      border-color: rgba(211, 47, 47, 0.2);
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 18px 24px;
      cursor: pointer;
      font-weight: 600;
      font-size: 16px;
      color: var(--text-dark);
      list-style: none;
      user-select: none;
      transition: background 0.2s;
    }

    .faq-question:hover {
      background: #fef9f8;
    }

    .faq-question::-webkit-details-marker {
      display: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 22px;
      font-weight: 300;
      color: var(--brand-red);
      transition: transform 0.25s;
      line-height: 1;
    }

    details[open] .faq-question::after {
      content: '−';
      transform: rotate(0deg);
    }

    details[open] .faq-question {
      background: #fef9f8;
    }

    .faq-answer {
      padding: 0 24px 22px;
      font-size: 15px;
      color: var(--text-light);
      line-height: 1.8;
    }

    /* 表单区域 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .contact-info h3 {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-dark);
    }

    .contact-info p {
      font-size: 16px;
      color: var(--text-light);
      line-height: 1.75;
    }

    .contact-channels {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 8px;
    }

    .channel-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 15px;
      color: var(--text-medium);
      background: #fff;
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }

    .channel-item strong {
      color: var(--text-dark);
      font-weight: 600;
    }

    .channel-icon {
      width: 24px;
      text-align: center;
      color: var(--brand-red);
      font-size: 18px;
    }

    .qr-wrap {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 20px;
      border: 1px solid var(--border-light);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    .qr-wrap img {
      width: 160px;
      height: auto;
      display: block;
    }

    .qr-wrap span {
      font-size: 13px;
      color: var(--text-light);
    }

    .contact-form {
      background: #fff;
      border-radius: var(--radius-lg);
      padding: 32px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-card);
    }

    .contact-form h3 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 24px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-medium);
      margin-bottom: 6px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #e4dbd9;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-family: inherit;
      color: var(--text-dark);
      background: #fefcfb;
      transition: border-color 0.2s, box-shadow 0.2s;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--brand-red);
      box-shadow: 0 0 0 3px rgba(211, 47, 47, 0.08);
      background: #fff;
    }

    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }

    .form-submit {
      width: 100%;
      margin-top: 6px;
    }

    /* Token比价 & 标签云 */
    .price-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      margin-top: 12px;
    }

    .price-pill {
      background: #fff;
      border-radius: 40px;
      padding: 10px 24px;
      border: 1px solid var(--border-light);
      font-size: 14.5px;
      font-weight: 600;
      color: var(--text-dark);
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .price-pill:hover {
      border-color: var(--brand-red);
      background: #fff9f8;
      transform: translateY(-3px);
      box-shadow: 0 8px 18px rgba(211, 47, 47, 0.08);
    }

    .price-pill .lowest {
      color: var(--brand-red);
      font-weight: 800;
    }

    /* 文章列表 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
      gap: 20px;
    }

    .article-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-light);
      transition: all 0.28s;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .article-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-dark);
      line-height: 1.4;
    }

    .article-card p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.65;
      flex-grow: 1;
    }

    .article-card a {
      font-size: 14px;
      font-weight: 600;
      color: var(--brand-red);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: gap 0.2s;
    }

    .article-card a:hover {
      gap: 8px;
    }

    /* 友情链接 */
    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px 24px;
      justify-content: center;
      align-items: center;
      margin-top: 16px;
    }

    .friend-links a {
      font-size: 14px;
      color: var(--text-light);
      text-decoration: none;
      transition: color 0.2s;
    }

    .friend-links a:hover {
      color: var(--brand-red);
      text-decoration: underline;
    }

    /* 页脚 */
    .footer {
      background: #1f1a18;
      color: #e8ddd9;
      padding: 48px 0 28px;
      margin-top: 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 32px;
      margin-bottom: 32px;
    }

    .footer-brand img {
      height: 36px;
      width: auto;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 14px;
      color: #b8aba6;
      line-height: 1.7;
      max-width: 280px;
    }

    .footer h4 {
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
      letter-spacing: 0.4px;
    }

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

    .footer ul a {
      color: #b8aba6;
      font-size: 14px;
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer ul a:hover {
      color: #ff8a80;
    }

    .footer-contact-item {
      display: flex;
      gap: 8px;
      font-size: 14px;
      color: #b8aba6;
      margin-bottom: 8px;
    }

    .footer-contact-item strong {
      color: #e8ddd9;
      font-weight: 500;
    }

    .footer-bottom {
      border-top: 1px solid #3a302c;
      padding-top: 20px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      font-size: 13px;
      color: #8a7b75;
    }

    .footer-bottom a {
      color: #8a7b75;
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: #ff8a80;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }

    .kefu-btn {
      width: 54px;
      height: 54px;
      border-radius: 50%;
      background: var(--brand-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      box-shadow: 0 8px 22px rgba(211, 47, 47, 0.35);
      border: none;
      font-size: 22px;
      transition: transform 0.25s, box-shadow 0.25s;
    }

    .kefu-btn:hover {
      transform: scale(1.06);
      box-shadow: 0 12px 30px rgba(211, 47, 47, 0.45);
    }

    .kefu-pop {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 18px;
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12);
      border: 1px solid var(--border-light);
      display: none;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      position: absolute;
      bottom: 66px;
      right: 0;
      width: 200px;
    }

    .kefu-pop.active {
      display: flex;
    }

    .kefu-pop img {
      width: 140px;
      height: auto;
      display: block;
    }

    .kefu-pop p {
      font-size: 13px;
      color: var(--text-light);
      text-align: center;
    }

    .back-top {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid #ddd;
      color: var(--text-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      transition: all 0.25s;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
    }

    .back-top:hover {
      background: var(--brand-red-light);
      border-color: var(--brand-red);
      color: var(--brand-red);
      transform: translateY(-3px);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero h1 { font-size: 36px; }
      .about-grid { grid-template-columns: 1fr; gap: 32px; }
      .case-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .nav-links { display: none; }
      .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: #fff; padding: 16px 24px; box-shadow: 0 12px 30px rgba(0,0,0,0.08); border-bottom: 1px solid var(--border-light); gap: 4px; align-items: stretch; }
      .nav-links.open a { padding: 10px 12px; border-radius: 6px; }
      .menu-toggle { display: flex; }
      .nav-cta .btn { display: none; }
      .nav-inner { position: relative; }
    }

    @media (max-width: 768px) {
      .hero { padding: 56px 0 48px; }
      .hero h1 { font-size: 30px; }
      .hero p { font-size: 16px; }
      .hero-stats { gap: 24px; }
      .stat-number { font-size: 22px; }
      .section-header h2 { font-size: 26px; }
      section { padding: 52px 0; }
      .service-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; gap: 24px; }
      .contact-form { padding: 24px; }
      .hero-actions { flex-direction: column; width: 100%; }
      .hero-actions .btn { width: 100%; }
      .about-features { grid-template-columns: 1fr; }
      .nav-brand span { font-size: 17px; }
      .compare-table th, .compare-table td { padding: 14px 16px; font-size: 14px; }
    }

    @media (prefers-reduced-motion: reduce) {
      .fade-up { opacity: 1 !important; transform: none !important; transition: none !important; }
      * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
    }