/* roulang page: index */
:root {
      --primary: #0B57D0;
      --primary-hover: #0842A0;
      --accent: #00D26A;
      --accent-dark: #00A853;
      --bg-main: #F8FAFC;
      --bg-card: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-sub: #64748B;
      --text-light: #F8FAFC;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-pill: 9999px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 4px 6px -1px rgba(0,0,0,0.08);
      --shadow-lg: 0 12px 24px -4px rgba(15,23,42,0.12);
      --max-w: 1240px;
    }

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

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    button, input, select, textarea {
      font-family: inherit;
    }

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

    /* 顶部通知与主导航条 */
    .top-bar {
      background-color: var(--bg-dark);
      color: var(--text-sub);
      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;
    }
    .status-indicator {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--text-light);
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      background-color: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--accent);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 22px;
      font-weight: 700;
      color: var(--primary);
    }
    .brand-logo span {
      color: var(--text-main);
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    /* 按钮通用体系 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #fff;
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(11, 87, 208, 0.25);
    }
    .btn-accent {
      background-color: var(--accent);
      color: var(--bg-dark);
    }
    .btn-accent:hover {
      background-color: var(--accent-dark);
      color: #fff;
    }
    .btn-outline {
      background: transparent;
      border-color: var(--border-color);
      color: var(--text-main);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-pill {
      border-radius: var(--radius-pill);
    }

    /* 区块通用结构 */
    .section {
      padding: 88px 0;
    }
    .section-alt {
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }
    .section-dark {
      background-color: var(--bg-dark);
      color: var(--text-light);
    }
    .section-header {
      margin-bottom: 48px;
      text-align: center;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 600;
      border-radius: var(--radius-pill);
      background: rgba(11, 87, 208, 0.1);
      color: var(--primary);
      margin-bottom: 12px;
    }
    .section-tag-light {
      background: rgba(0, 210, 106, 0.15);
      color: var(--accent);
    }
    .section-title {
      font-size: 32px;
      font-weight: 700;
      line-height: 1.35;
      margin-bottom: 16px;
      color: var(--text-main);
    }
    .section-dark .section-title {
      color: #fff;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-sub);
      max-width: 780px;
      margin: 0 auto;
      line-height: 1.7;
    }
    .section-dark .section-desc {
      color: #94A3B8;
    }

    /* 1. Hero 裂变邀请首屏 */
    .hero-section {
      position: relative;
      padding: 96px 0 80px;
      background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
      overflow: hidden;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(11, 87, 208, 0.82) 100%);
    }
    .hero-content {
      position: relative;
      z-index: 2;
      color: #fff;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 48px;
      align-items: center;
    }
    .hero-text h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .hero-text p {
      font-size: 16px;
      line-height: 1.8;
      color: #CBD5E1;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
    }
    .referral-card {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: var(--radius-md);
      padding: 24px;
      backdrop-filter: blur(12px);
    }
    .referral-title {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 12px;
      display: flex;
      justify-content: space-between;
    }
    .progress-bar-wrap {
      width: 100%;
      height: 10px;
      background: rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-pill);
      overflow: hidden;
      margin-bottom: 12px;
    }
    .progress-bar-fill {
      width: 68%;
      height: 100%;
      background: var(--accent);
      border-radius: var(--radius-pill);
    }
    .referral-desc {
      font-size: 13px;
      color: #CBD5E1;
      line-height: 1.6;
    }

    /* 2. 指标看板 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      border-left: 4px solid var(--primary);
    }
    .metric-num {
      font-size: 38px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      display: flex;
      align-items: baseline;
      gap: 4px;
    }
    .metric-unit {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-sub);
    }
    .metric-name {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .metric-info {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 3. 品类入口区 */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .category-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .category-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .category-img {
      height: 200px;
      position: relative;
      overflow: hidden;
    }
    .category-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .category-body {
      padding: 24px;
    }
    .category-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .category-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .category-params {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .param-badge {
      font-size: 12px;
      background: #EFF6FF;
      color: var(--primary);
      padding: 3px 10px;
      border-radius: var(--radius-sm);
    }

    /* 4. 平台核心优势矩阵 */
    .advantages-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .adv-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      transition: all 0.25s ease;
    }
    .adv-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-lg);
    }
    .adv-icon {
      width: 48px;
      height: 48px;
      background: rgba(11, 87, 208, 0.08);
      color: var(--primary);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 20px;
    }
    .adv-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .adv-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 5. 附近推荐与典型网点 */
    .loc-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .loc-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      background: #fff;
    }
    .loc-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 12px;
    }
    .loc-name {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
    }
    .loc-distance {
      font-size: 12px;
      color: var(--accent-dark);
      background: #E8F8F0;
      padding: 2px 8px;
      border-radius: 4px;
    }
    .loc-info {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 14px;
      line-height: 1.6;
    }
    .loc-status {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 6. 深色概念与全景监控枢纽 */
    .ops-showcase {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .ops-visual {
      background: var(--bg-dark-card);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .ops-tagline {
      font-size: 13px;
      color: var(--accent);
      font-family: monospace;
      margin-bottom: 12px;
    }
    .ops-item {
      display: flex;
      gap: 16px;
      margin-bottom: 24px;
    }
    .ops-bullet {
      width: 28px;
      height: 28px;
      background: rgba(0, 210, 106, 0.15);
      color: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-weight: 700;
    }
    .ops-item h4 {
      font-size: 16px;
      margin-bottom: 6px;
      color: #fff;
    }
    .ops-item p {
      font-size: 14px;
      color: #94A3B8;
      line-height: 1.6;
    }

    /* 7. 模式结果对比区 */
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }
    .compare-table th, .compare-table td {
      padding: 18px 24px;
      text-align: left;
      font-size: 15px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-highlight {
      background: #F0FDF4;
      font-weight: 600;
      color: var(--primary);
    }

    /* 8. 标杆案例 */
    .story-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
    }
    .story-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }
    .story-img {
      height: 220px;
    }
    .story-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }
    .story-content {
      padding: 28px;
      flex: 1;
    }
    .story-badge {
      font-size: 12px;
      background: #EEF2FF;
      color: var(--primary);
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
      display: inline-block;
    }
    .story-content h3 {
      font-size: 20px;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .story-content p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 9. 里程碑与保障体系 */
    .milestone-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-bottom: 48px;
      position: relative;
    }
    .milestone-item {
      background: #fff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      position: relative;
    }
    .milestone-date {
      font-size: 18px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }
    .milestone-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .milestone-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }
    .sla-cards {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .sla-box {
      background: #F8FAFC;
      border: 1px dashed var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      text-align: center;
    }
    .sla-val {
      font-size: 24px;
      font-weight: 800;
      color: var(--accent-dark);
      margin-bottom: 6px;
    }
    .sla-box h4 {
      font-size: 14px;
      margin-bottom: 4px;
      color: var(--text-main);
    }
    .sla-box p {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 10. 到店与部署流程 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .step-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 11. 资讯动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .news-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-meta {
      font-size: 12px;
      color: var(--text-sub);
      margin-bottom: 10px;
    }
    .news-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .news-summary {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .news-tags {
      display: flex;
      gap: 8px;
    }

    /* 12. 口碑榜 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #F59E0B;
      font-size: 16px;
      margin-bottom: 14px;
    }
    .review-body {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-title {
      font-size: 12px;
      color: var(--text-sub);
    }

    /* 13. 常见问题手风琴 */
    .faq-layout {
      display: grid;
      grid-template-columns: 1fr 1.6fr;
      gap: 48px;
    }
    .faq-left h3 {
      font-size: 26px;
      margin-bottom: 16px;
    }
    .faq-left p {
      font-size: 15px;
      color: var(--text-sub);
      line-height: 1.7;
    }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
    }
    .faq-item summary {
      padding: 18px 20px;
      font-weight: 600;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      list-style: none;
      color: var(--text-main);
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
    }
    .faq-item[open] summary::after {
      content: '−';
    }
    .faq-answer {
      padding: 0 20px 18px 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    /* 14. 意向预约与转化表单 */
    .cta-card {
      background: linear-gradient(135deg, #0F172A 0%, #1E3A8A 100%);
      border-radius: var(--radius-md);
      padding: 64px 48px;
      color: #fff;
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 48px;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }
    .cta-info h3 {
      font-size: 32px;
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 16px;
    }
    .cta-info p {
      font-size: 15px;
      color: #CBD5E1;
      line-height: 1.7;
      margin-bottom: 24px;
    }
    .cta-benefits {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .cta-benefits li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: #E2E8F0;
    }
    .cta-benefits li::before {
      content: '✓';
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--accent);
      color: var(--bg-dark);
      font-size: 12px;
      font-weight: bold;
    }
    .cta-form {
      background: #FFFFFF;
      padding: 32px;
      border-radius: var(--radius-md);
      color: var(--text-main);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    }
    .cta-form h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 20px;
      color: var(--text-main);
      text-align: center;
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-muted);
    }
    .form-input, .form-select {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.2s ease;
    }
    .form-input:focus, .form-select:focus {
      border-color: var(--primary);
    }
    .form-privacy {
      font-size: 12px;
      color: var(--text-sub);
      margin-top: 12px;
      text-align: center;
      line-height: 1.5;
    }

    /* 站点统一页脚 */
    .site-footer {
      background-color: var(--bg-dark);
      color: #94A3B8;
      font-size: 14px;
      padding: 64px 0 28px;
      border-top: 1px solid var(--border-dark);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-brand h4 {
      font-size: 20px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-brand p {
      line-height: 1.7;
      color: #94A3B8;
      font-size: 13px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94A3B8;
    }
    .footer-links a:hover {
      color: #fff;
    }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-content {
        grid-template-columns: 1fr;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .category-grid, .advantages-grid, .loc-grid, .news-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .ops-showcase, .story-grid, .faq-layout, .cta-card {
        grid-template-columns: 1fr;
      }
      .milestone-track, .sla-cards, .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
      }
      .section {
        padding: 56px 0;
      }
      .hero-text h1 {
        font-size: 28px;
      }
      .section-title {
        font-size: 24px;
      }
      .metrics-grid, .category-grid, .advantages-grid, .loc-grid, .news-grid, .reviews-grid, .milestone-track, .sla-cards, .flow-steps {
        grid-template-columns: 1fr;
      }
      .cta-card {
        padding: 32px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }