/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-dark: #0A3A85;
      --accent: #00C853;
      --accent-hover: #00A344;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0B132B;
      --text-title: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius: 12px;
      --shadow-sm: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 12px 30px -4px rgba(15, 23, 42, 0.12);
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--text-body);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
    }

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

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

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部信息条 */
    .top-bar {
      background-color: #081B38;
      color: #94A3B8;
      font-size: 13px;
      padding: 8px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .top-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .top-bar-left, .top-bar-right {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .top-bar-highlight {
      color: var(--accent);
      font-weight: 600;
    }

    /* 导航栏 */
    .site-header {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .nav-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
    }
    .brand-logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary), #2563EB);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 32px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-title);
      padding: 6px 0;
      position: relative;
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
    }
    .nav-menu a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: var(--transition);
    }
    .nav-menu a:hover::after {
      width: 100%;
    }
    .btn-nav-cta {
      background-color: var(--accent);
      color: #FFFFFF !important;
      padding: 10px 22px !important;
      border-radius: 9999px;
      font-weight: 700 !important;
      transition: var(--transition);
      box-shadow: 0 4px 12px rgba(0, 200, 83, 0.25);
    }
    .btn-nav-cta:hover {
      background-color: var(--accent-hover);
      transform: translateY(-1px);
    }
    .btn-nav-cta::after {
      display: none !important;
    }

    /* 移动端汉堡包 */
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 5px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-title);
      transition: var(--transition);
    }

    /* 通用Section */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: #FFFFFF;
    }
    .section-white {
      background-color: var(--bg-white);
    }
    .section-light {
      background-color: var(--bg-light);
    }
    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: rgba(15, 82, 186, 0.08);
      color: var(--primary);
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-tag-dark {
      background-color: rgba(0, 200, 83, 0.15);
      color: var(--accent);
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-title);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .section-dark .section-title {
      color: #FFFFFF;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.8;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 32px;
      border-radius: 8px;
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      transition: var(--transition);
      border: none;
      text-align: center;
      min-height: 48px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 15px rgba(15, 82, 186, 0.3);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
    }
    .btn-accent {
      background-color: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 15px rgba(0, 200, 83, 0.3);
    }
    .btn-accent:hover {
      background-color: var(--accent-hover);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 2px solid var(--border-color);
      background: #FFFFFF;
      color: var(--text-title);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 1. Hero 板块 */
    .hero-section {
      background: linear-gradient(135deg, #0A1931 0%, #0F52BA 100%), url('/assets/images/51ce7eb6353663a5.png') center/cover no-repeat;
      background-blend-mode: overlay;
      color: #FFFFFF;
      padding: 90px 0 100px;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 50px;
      align-items: center;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: #FFFFFF;
    }
    .hero-h1 span {
      color: var(--accent);
    }
    .hero-p {
      font-size: 16px;
      line-height: 1.8;
      color: #E2E8F0;
      margin-bottom: 30px;
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 35px;
    }
    .hero-badge-item {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 500;
      backdrop-filter: blur(4px);
    }
    .hero-actions {
      display: flex;
      gap: 18px;
    }
    .hero-visual {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 0 20px 40px rgba(0,0,0,0.35);
      border: 2px solid rgba(255,255,255,0.15);
    }
    .hero-visual img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .hero-floating-card {
      position: absolute;
      bottom: 20px;
      right: 20px;
      background: rgba(11, 19, 43, 0.9);
      backdrop-filter: blur(8px);
      padding: 15px 20px;
      border-radius: 8px;
      border-left: 4px solid var(--accent);
      color: #FFFFFF;
    }
    .hero-floating-card .title {
      font-size: 12px;
      color: #94A3B8;
    }
    .hero-floating-card .val {
      font-size: 20px;
      font-weight: 800;
      color: var(--accent);
    }

    /* 2. 卖点三连 */
    .selling-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: -50px;
      position: relative;
      z-index: 10;
    }
    .selling-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      padding: 35px 30px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .selling-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary);
    }
    .selling-icon {
      width: 56px;
      height: 56px;
      background: rgba(15, 82, 186, 0.08);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 20px;
      font-weight: bold;
    }
    .selling-title {
      font-size: 20px;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 12px;
    }
    .selling-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 3. 产线与系统架构能力 */
    .feature-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }
    .feature-img-box {
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
    }
    .feature-img-box img {
      width: 100%;
      height: 380px;
      object-fit: cover;
    }
    .spec-badge-group {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 25px;
    }
    .spec-item {
      background: var(--bg-white);
      padding: 16px;
      border-radius: 8px;
      border-left: 3px solid var(--primary);
      border-top: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .spec-item-num {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
    }
    .spec-item-lbl {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 4. 核心功能优势 6网格 */
    .grid-6 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }
    .card-feature {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      transition: var(--transition);
    }
    .card-feature:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-lg);
    }
    .card-feature-head {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 15px;
    }
    .card-feature-num {
      font-size: 14px;
      font-weight: 800;
      color: var(--primary);
      background: rgba(15, 82, 186, 0.1);
      padding: 4px 8px;
      border-radius: 4px;
    }
    .card-feature-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-title);
    }
    .card-feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 5. 热门硬件与软硬件一体化 */
    .products-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .product-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .product-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
    }
    .product-img {
      height: 220px;
      width: 100%;
      object-fit: cover;
      background-color: #F1F5F9;
    }
    .product-body {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .product-name {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 8px;
    }
    .product-specs {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.6;
    }
    .product-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 20px;
    }
    .product-tag {
      font-size: 12px;
      background: #F1F5F9;
      color: #475569;
      padding: 2px 8px;
      border-radius: 4px;
    }

    /* 6. 深色沉浸式案例现场 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .case-card {
      background: #111D40;
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius);
      overflow: hidden;
      transition: var(--transition);
    }
    .case-card:hover {
      border-color: var(--accent);
      transform: translateY(-4px);
    }
    .case-img {
      height: 200px;
      width: 100%;
      object-fit: cover;
    }
    .case-content {
      padding: 24px;
    }
    .case-tag {
      color: var(--accent);
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      margin-bottom: 6px;
    }
    .case-title {
      font-size: 18px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .case-desc {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.7;
    }

    /* 7. 运营痛点对比 */
    .compare-box {
      display: grid;
      grid-template-columns: 1fr 1fr;
      background: var(--bg-white);
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .compare-col {
      padding: 40px;
    }
    .compare-col.bad {
      background: #FFF5F5;
      border-right: 1px solid #FED7D7;
    }
    .compare-col.good {
      background: #F0FDF4;
    }
    .compare-header {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 24px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .compare-header.bad-title { color: #C53030; }
    .compare-header.good-title { color: #15803D; }
    .compare-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .compare-list li {
      font-size: 14px;
      line-height: 1.6;
      display: flex;
      align-items: flex-start;
      gap: 10px;
    }
    .compare-list.bad-list li { color: #742A2A; }
    .compare-list.good-list li { color: #166534; }

    /* 8. 业务数据统计条 */
    .stats-section {
      background: linear-gradient(135deg, #0B132B 0%, #172554 100%);
      color: #FFFFFF;
      padding: 60px 0;
      border-top: 1px solid rgba(255,255,255,0.08);
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      text-align: center;
    }
    .stat-item-num {
      font-size: 40px;
      font-weight: 900;
      color: var(--accent);
      margin-bottom: 8px;
    }
    .stat-item-label {
      font-size: 14px;
      color: #CBD5E1;
      font-weight: 500;
    }

    /* 9. 客户评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 14px;
    }
    .review-quote {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 15px;
    }
    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--primary);
    }
    .reviewer-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-title);
    }
    .reviewer-post {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 10. 资讯文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }
    .article-card {
      background: var(--bg-white);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .article-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .article-thumb {
      height: 180px;
      width: 100%;
      object-fit: cover;
    }
    .article-content {
      padding: 20px;
    }
    .article-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .article-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .article-summary {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 11. FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-q {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-title);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FAFAFA;
      user-select: none;
    }
    .faq-q:hover {
      background: #F1F5F9;
    }
    .faq-a {
      padding: 20px 24px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      border-top: 1px solid var(--border-color);
      background: #FFFFFF;
    }

    /* 12. 保障承诺条 */
    .guarantee-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .guarantee-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 24px 20px;
      border-radius: var(--radius);
      text-align: center;
    }
    .guarantee-icon {
      font-size: 28px;
      color: var(--accent);
      margin-bottom: 10px;
    }
    .guarantee-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-title);
      margin-bottom: 6px;
    }
    .guarantee-desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 13. 底部转化表单 */
    .contact-box {
      background: linear-gradient(135deg, #0F52BA 0%, #0A2D6C 100%);
      border-radius: var(--radius);
      padding: 50px;
      color: #FFFFFF;
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 50px;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }
    .contact-left h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 15px;
      line-height: 1.3;
    }
    .contact-left p {
      font-size: 15px;
      color: #CBD5E1;
      margin-bottom: 25px;
      line-height: 1.7;
    }
    .contact-phone-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(255,255,255,0.15);
      padding: 12px 20px;
      border-radius: 8px;
      font-size: 18px;
      font-weight: 800;
      color: var(--accent);
    }
    .contact-form {
      background: #FFFFFF;
      padding: 30px;
      border-radius: 10px;
      color: var(--text-title);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-title);
      margin-bottom: 6px;
    }
    .form-input, .form-select {
      width: 100%;
      height: 44px;
      padding: 0 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 14px;
      color: var(--text-body);
      outline: none;
      transition: var(--transition);
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(15, 82, 186, 0.15);
    }

    /* 底部固定转化条 */
    .sticky-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      width: 100%;
      background: rgba(11, 19, 43, 0.95);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px 0;
      z-index: 99;
      transform: translateY(100%);
      transition: transform 0.3s ease-in-out;
      box-shadow: 0 -4px 20px rgba(0,0,0,0.2);
    }
    .sticky-bar.visible {
      transform: translateY(0);
    }
    .sticky-bar-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .sticky-text {
      color: #FFFFFF;
      font-size: 15px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .sticky-tag {
      background: var(--accent);
      color: #0F172A;
      font-size: 11px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .sticky-actions {
      display: flex;
      gap: 12px;
    }

    /* 页脚 Footer */
    .site-footer {
      background-color: #060B18;
      color: #94A3B8;
      padding: 70px 0 30px;
      font-size: 13px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 50px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: #FFFFFF;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 25px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; }
      .hero-visual { display: none; }
      .selling-grid { grid-template-columns: 1fr; margin-top: 30px; }
      .feature-row { grid-template-columns: 1fr; }
      .grid-6 { grid-template-columns: repeat(2, 1fr); }
      .products-grid { grid-template-columns: repeat(2, 1fr); }
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .articles-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .guarantee-bar { grid-template-columns: repeat(2, 1fr); }
      .contact-box { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .top-bar { display: none; }
      .menu-toggle { display: flex; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        gap: 15px;
      }
      .nav-menu.open { display: flex; }
      .btn-nav-cta { width: 100%; text-align: center; }
      .hero-h1 { font-size: 28px; }
      .section-title { font-size: 24px; }
      .grid-6, .products-grid, .cases-grid, .reviews-grid, .articles-grid, .guarantee-bar {
        grid-template-columns: 1fr;
      }
      .compare-box { grid-template-columns: 1fr; }
      .compare-col.bad { border-right: none; border-bottom: 1px solid #FED7D7; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .contact-box { padding: 30px 20px; }
      .sticky-bar { display: none; } /* 移动端让出屏幕空间 */
      .footer-grid { grid-template-columns: 1fr; }
    }