* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    :root {
      --primary: #e63f2e;
      --primary-dark: #c42d1e;
      --primary-light: #ff7a6b;
      --secondary: #1e2b3c;
      --accent: #ffb800;
      --accent-soft: #fff3d9;
      --bg: #fdf9f4;
      --surface: #ffffff;
      --text: #1c1b1a;
      --text-secondary: #4e4b48;
      --border: #e8e0d7;
      --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.07);
      --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.09);
      --radius-sm: 10px;
      --radius-md: 18px;
      --radius-lg: 28px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(253, 249, 244, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(232, 224, 215, 0.6);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }

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

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

    .brand-name {
      font-weight: 700;
      font-size: 1.15rem;
      color: var(--secondary);
      letter-spacing: 0.02em;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 13px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-secondary);
      text-decoration: none;
      border-radius: 8px;
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(230, 63, 46, 0.07);
    }

    .nav-actions {
      display: flex;
      gap: 10px;
      align-items: center;
      flex-shrink: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 7px;
      padding: 11px 24px;
      border-radius: 40px;
      font-weight: 600;
      font-size: 0.92rem;
      text-decoration: none;
      border: none;
      cursor: pointer;
      transition: var(--transition);
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 6px 18px rgba(230, 63, 46, 0.28);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 8px 24px rgba(230, 63, 46, 0.42);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--secondary);
      border: 1.5px solid var(--border);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(230, 63, 46, 0.04);
      transform: translateY(-2px);
    }

    .btn-accent {
      background: var(--accent);
      color: #1c1b1a;
      box-shadow: 0 6px 18px rgba(255, 184, 0, 0.35);
    }

    .btn-accent:hover {
      background: #f0a800;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 184, 0, 0.5);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: 1.5px solid var(--border);
      border-radius: 10px;
      padding: 8px 12px;
      cursor: pointer;
      color: var(--secondary);
      font-size: 1.2rem;
      line-height: 1;
    }

    /* Hero */
    .hero {
      position: relative;
      padding: 70px 0 60px;
      background: linear-gradient(160deg, #fff7ee 0%, #fdece2 35%, #fdf9f4 70%);
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: -180px;
      right: -120px;
      width: 520px;
      height: 520px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(230, 63, 46, 0.08) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero::after {
      content: '';
      position: absolute;
      bottom: -200px;
      left: -100px;
      width: 480px;
      height: 480px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(255, 184, 0, 0.1) 0%, transparent 70%);
      pointer-events: none;
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
      position: relative;
      z-index: 1;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(230, 63, 46, 0.08);
      color: var(--primary);
      font-size: 0.82rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 40px;
      margin-bottom: 22px;
      letter-spacing: 0.04em;
      animation: fadeInUp 0.7s ease both;
    }

    .hero-badge span {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--primary);
      display: inline-block;
    }

    .hero h1 {
      font-size: clamp(1.9rem, 4vw, 2.9rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--secondary);
      margin-bottom: 18px;
      letter-spacing: -0.01em;
      animation: fadeInUp 0.7s 0.1s ease both;
    }

    .hero h1 em {
      font-style: normal;
      color: var(--primary);
      position: relative;
    }

    .hero-desc {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 560px;
      margin-bottom: 30px;
      line-height: 1.75;
      animation: fadeInUp 0.7s 0.2s ease both;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 34px;
      animation: fadeInUp 0.7s 0.3s ease both;
    }

    .hero-stats {
      display: flex;
      gap: 32px;
      flex-wrap: wrap;
      animation: fadeInUp 0.7s 0.4s ease both;
    }

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

    .hero-stat-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--secondary);
      line-height: 1.3;
    }

    .hero-stat-label {
      font-size: 0.82rem;
      color: var(--text-secondary);
      font-weight: 500;
    }

    .hero-visual {
      position: relative;
      z-index: 1;
      animation: fadeInUp 0.8s 0.25s ease both;
    }

    .hero-panel {
      background: var(--surface);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      border: 1px solid rgba(255, 255, 255, 0.9);
      position: relative;
    }

    .hero-panel-title {
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      color: var(--text-secondary);
      margin-bottom: 16px;
      text-transform: uppercase;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .hero-panel-title::before {
      content: '';
      width: 4px;
      height: 16px;
      border-radius: 4px;
      background: var(--primary);
      display: inline-block;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 22px;
    }

    .model-tag {
      font-size: 0.78rem;
      font-weight: 500;
      padding: 5px 12px;
      border-radius: 30px;
      background: var(--bg);
      color: var(--text-secondary);
      border: 1px solid var(--border);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      transform: translateY(-1px);
    }

    .hero-panel-divider {
      height: 1px;
      background: var(--border);
      margin: 16px 0 18px;
    }

    .hero-panel-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 9px 0;
      font-size: 0.88rem;
    }

    .hero-panel-row-label {
      color: var(--text-secondary);
      font-weight: 500;
    }

    .hero-panel-row-value {
      font-weight: 700;
      color: var(--secondary);
      font-size: 0.92rem;
    }

    .hero-panel-row-value.accent {
      color: var(--primary);
    }

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

    .section-alt {
      background: var(--surface);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.78rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      color: var(--primary);
      background: rgba(230, 63, 46, 0.07);
      padding: 5px 16px;
      border-radius: 40px;
      margin-bottom: 14px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: clamp(1.55rem, 3vw, 2.2rem);
      font-weight: 800;
      color: var(--secondary);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 0.98rem;
      color: var(--text-secondary);
      line-height: 1.7;
      max-width: 600px;
      margin: 0 auto;
    }

    /* 数据指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .metric-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      text-align: center;
    }

    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(230, 63, 46, 0.25);
    }

    .metric-icon {
      font-size: 1.6rem;
      margin-bottom: 8px;
      display: block;
    }

    .metric-num {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.3;
    }

    .metric-label {
      font-size: 0.86rem;
      color: var(--text-secondary);
      margin-top: 4px;
      font-weight: 500;
    }

    /* 服务能力卡片 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 30px 26px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .service-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      opacity: 0;
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(230, 63, 46, 0.2);
    }

    .service-card:hover::after {
      opacity: 1;
    }

    .service-icon {
      width: 46px;
      height: 46px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(230, 63, 46, 0.12), rgba(255, 184, 0, 0.18));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 18px;
    }

    .service-card h3 {
      font-size: 1.08rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 8px;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.65;
    }

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

    .step-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }

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

    .step-num {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
      opacity: 0.35;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 6px;
    }

    .step-card p {
      font-size: 0.86rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

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

    .case-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16/10;
      overflow: hidden;
      background: #f5f0ea;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.45s ease;
    }

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

    .case-body {
      padding: 18px 20px 20px;
    }

    .case-body h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 6px;
    }

    .case-body p {
      font-size: 0.86rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* 对比评测 */
    .compare-wrap {
      overflow-x: auto;
      background: var(--surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      padding: 4px;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
      min-width: 720px;
    }

    .compare-table thead th {
      background: var(--secondary);
      color: #fff;
      padding: 16px 20px;
      text-align: left;
      font-weight: 600;
      font-size: 0.88rem;
      white-space: nowrap;
    }

    .compare-table thead th:first-child {
      border-radius: var(--radius-sm) 0 0 0;
    }

    .compare-table thead th:last-child {
      border-radius: 0 var(--radius-sm) 0 0;
    }

    .compare-table tbody td {
      padding: 15px 20px;
      border-bottom: 1px solid var(--border);
      color: var(--text-secondary);
      vertical-align: top;
    }

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

    .compare-table tbody tr:hover {
      background: rgba(230, 63, 46, 0.025);
    }

    .compare-table .highlight {
      color: var(--primary);
      font-weight: 700;
    }

    .rating-stars {
      color: var(--accent);
      font-size: 1rem;
      letter-spacing: 2px;
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: var(--primary);
      color: #fff;
      font-weight: 700;
      font-size: 0.86rem;
      padding: 4px 12px;
      border-radius: 30px;
    }

    /* 评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .review-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 26px 24px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .review-text {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.7;
      flex: 1;
    }

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

    .review-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-light), var(--accent));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-weight: 700;
      font-size: 0.9rem;
      flex-shrink: 0;
    }

    .review-name {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--secondary);
    }

    .review-role {
      font-size: 0.78rem;
      color: var(--text-secondary);
    }

    /* FAQ */
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--surface);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(230, 63, 46, 0.25);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 18px 22px;
      background: none;
      border: none;
      cursor: pointer;
      font-size: 0.96rem;
      font-weight: 600;
      color: var(--secondary);
      text-align: left;
      line-height: 1.5;
      transition: var(--transition);
    }

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

    .faq-question .icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--bg);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      color: var(--text-secondary);
      flex-shrink: 0;
      transition: var(--transition);
    }

    .faq-item.active .faq-question .icon {
      background: var(--primary);
      color: #fff;
      transform: rotate(45deg);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease, padding 0.35s ease;
      padding: 0 22px;
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 280px;
      padding: 0 22px 20px;
    }

    /* 文章列表 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .article-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      background: var(--surface);
      border-radius: var(--radius-sm);
      padding: 16px 18px;
      border: 1px solid var(--border);
      text-decoration: none;
      transition: var(--transition);
    }

    .article-item:hover {
      transform: translateX(4px);
      border-color: rgba(230, 63, 46, 0.25);
      box-shadow: var(--shadow-sm);
    }

    .article-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      margin-top: 8px;
      flex-shrink: 0;
    }

    .article-title {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--secondary);
      line-height: 1.5;
      margin-bottom: 3px;
    }

    .article-meta {
      font-size: 0.78rem;
      color: var(--text-secondary);
    }

    /* 表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 44px;
      align-items: start;
    }

    .contact-info h3 {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 14px;
    }

    .contact-info p {
      font-size: 0.92rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 22px;
    }

    .contact-methods {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .contact-method {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9rem;
      color: var(--text-secondary);
    }

    .contact-method-icon {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: rgba(230, 63, 46, 0.07);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }

    .contact-method strong {
      color: var(--secondary);
      font-weight: 600;
    }

    .contact-form-wrap {
      background: var(--surface);
      border-radius: var(--radius-md);
      padding: 32px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--secondary);
      margin-bottom: 6px;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 15px;
      border: 1.5px solid var(--border);
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      font-family: inherit;
      color: var(--text);
      background: var(--bg);
      transition: var(--transition);
      outline: none;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      background: #fff;
      box-shadow: 0 0 0 3px rgba(230, 63, 46, 0.1);
    }

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

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

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

    /* 友情链接 & 底部 */
    .friend-links-section {
      padding: 36px 0 28px;
      border-top: 1px solid var(--border);
      background: var(--bg);
    }

    .friend-links-title {
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: var(--text-secondary);
      text-transform: uppercase;
      margin-bottom: 16px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 24px;
      align-items: center;
    }

    .friend-links-wrap a {
      font-size: 0.85rem;
      color: var(--text-secondary);
      text-decoration: none;
      transition: var(--transition);
      padding: 2px 0;
    }

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

    .site-footer {
      background: var(--secondary);
      color: #e8e6e3;
      padding: 48px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 34px;
    }

    .footer-brand img {
      max-height: 34px;
      width: auto;
      margin-bottom: 14px;
      display: block;
      
    }

    .footer-brand p {
      font-size: 0.86rem;
      color: #b5b1ac;
      line-height: 1.7;
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: 0.92rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
      letter-spacing: 0.02em;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col ul li a {
      font-size: 0.85rem;
      color: #b5b1ac;
      text-decoration: none;
      transition: var(--transition);
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.8rem;
      color: #8a8681;
    }

    .footer-bottom a {
      color: #b5b1ac;
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: var(--accent);
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 22px;
      bottom: 86px;
      z-index: 90;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--surface);
      border: 1px solid var(--border);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.2rem;
      color: var(--secondary);
      transition: var(--transition);
      text-decoration: none;
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .back-top {
      position: fixed;
      right: 22px;
      bottom: 26px;
      z-index: 90;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--secondary);
      color: #fff;
      border: none;
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.2rem;
      box-shadow: var(--shadow-md);
      transition: var(--transition);
      opacity: 0;
      visibility: hidden;
    }

    .back-top.show {
      opacity: 1;
      visibility: visible;
    }

    .back-top:hover {
      background: var(--primary);
      transform: translateY(-3px);
    }

    /* 动画 */
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(24px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity 0.65s ease, transform 0.65s ease;
    }

    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }

      .hero {
        padding: 50px 0 44px;
      }

      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .service-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .case-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }

      .header-inner {
        min-height: 60px;
        gap: 10px;
      }

      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(253, 249, 244, 0.98);
        backdrop-filter: blur(14px);
        flex-direction: column;
        align-items: stretch;
        padding: 10px 16px 16px;
        gap: 2px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
      }

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

      .nav-links li a {
        padding: 10px 12px;
        border-radius: 8px;
        white-space: normal;
      }

      .mobile-toggle {
        display: block;
      }

      .nav-actions .btn-outline {
        display: none;
      }

      .hero {
        padding: 36px 0 36px;
      }

      .hero h1 {
        font-size: 1.7rem;
      }

      .hero-desc {
        font-size: 0.95rem;
      }

      .hero-stats {
        gap: 20px;
      }

      .hero-stat-num {
        font-size: 1.25rem;
      }

      .section {
        padding: 50px 0;
      }

      .section-header {
        margin-bottom: 32px;
      }

      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
      }

      .metric-card {
        padding: 20px 14px;
      }

      .service-grid {
        grid-template-columns: 1fr;
        gap: 14px;
      }

      .steps-grid {
        grid-template-columns: 1fr;
        gap: 12px;
      }

      .case-grid {
        grid-template-columns: 1fr;
      }

      .review-grid {
        grid-template-columns: 1fr;
      }

      .article-grid {
        grid-template-columns: 1fr;
      }

      .form-row {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .contact-form-wrap {
        padding: 22px;
      }

      .float-service {
        right: 14px;
        bottom: 76px;
      }

      .back-top {
        right: 14px;
        bottom: 20px;
      }

      .float-btn,
      .back-top {
        width: 44px;
        height: 44px;
        font-size: 1rem;
      }

      .compare-wrap {
        border-radius: var(--radius-sm);
      }

      .hero-panel {
        padding: 22px 18px;
      }
    }

    @media (max-width: 480px) {
      .hero-actions {
        flex-direction: column;
        gap: 10px;
      }

      .hero-actions .btn {
        width: 100%;
        justify-content: center;
      }

      .hero-stats {
        gap: 16px;
      }

      .hero-stat-num {
        font-size: 1.1rem;
      }

      .metric-num {
        font-size: 1.3rem;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
    }