/* roulang page: index */
:root {
      --primary: #10B981;
      --primary-dark: #059669;
      --secondary: #6366F1;
      --secondary-dark: #4F46E5;
      --accent-gold: #F59E0B;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #0F172A;
      --bg-dark-card: #1E293B;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --border-dark: #334155;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px 0 rgba(0, 0, 0, 0.03);
      --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
      --shadow-gold: 0 10px 25px -5px rgba(245, 158, 11, 0.25);
      --transition: all 0.25s ease-in-out;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "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;
      overflow-x: hidden;
    }

    a { color: var(--secondary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary); text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }

    /* 顶部辅助栏与卡片化主导航 */
    .top-meta-bar {
      background: #090D16;
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .top-meta-bar .status-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: #34D399;
    }
    .status-dot {
      width: 7px;
      height: 7px;
      background: #10B981;
      border-radius: 50%;
      box-shadow: 0 0 8px #10B981;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      padding: 12px 0;
      background: rgba(248, 250, 252, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-card-panel {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 10px 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }
    .nav-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.2rem;
      color: var(--text-main);
      white-space: nowrap;
    }
    .nav-brand-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 1rem;
      font-weight: bold;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      margin: 0;
      padding: 0;
      list-style: none;
      overflow-x: auto;
    }
    .nav-links li a {
      display: inline-flex;
      align-items: center;
      padding: 8px 14px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-body);
      border-radius: var(--radius-sm);
      white-space: nowrap;
      transition: var(--transition);
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-dark);
      background: #ECFDF5;
    }
    .nav-action-btn {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #FFFFFF !important;
      font-size: 0.875rem;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: var(--radius-sm);
      white-space: nowrap;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
    }
    .nav-action-btn:hover {
      box-shadow: 0 6px 14px rgba(16, 185, 129, 0.35);
      transform: translateY(-1px);
    }

    /* 通用板块与排版 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }
    .section-wrap.alt-bg {
      background-color: #F1F5F9;
    }
    .section-wrap.dark-theme {
      background-color: var(--bg-dark);
      color: #E2E8F0;
    }
    .section-header {
      text-align: center;
      max-width: 820px;
      margin: 0 auto 52px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      padding: 4px 12px;
      border-radius: 9999px;
      background: #ECFDF5;
      color: var(--primary-dark);
      margin-bottom: 12px;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }
    .dark-theme .section-tag {
      background: rgba(16, 185, 129, 0.15);
      color: #34D399;
      border-color: rgba(52, 211, 153, 0.3);
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 16px;
    }
    .dark-theme .section-title {
      color: #F8FAFC;
    }
    .section-desc {
      font-size: 1.05rem;
      line-height: 1.8;
      color: var(--text-muted);
      margin: 0;
    }
    .dark-theme .section-desc {
      color: #94A3B8;
    }

    /* 模块1：Hero - 会员俱乐部黑金感与等级徽章 */
    #hero {
      position: relative;
      background: radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.15), transparent 50%),
                  linear-gradient(180deg, #090E1A 0%, #111827 100%);
      color: #F8FAFC;
      padding: 100px 0 110px 0;
      border-bottom: 1px solid rgba(245, 158, 11, 0.2);
      overflow: hidden;
    }
    .hero-badge-vip {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(245, 158, 11, 0.2), rgba(245, 158, 11, 0.05));
      border: 1px solid var(--accent-gold);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 700;
      color: #FDE68A;
      margin-bottom: 24px;
      box-shadow: 0 0 15px rgba(245, 158, 11, 0.2);
    }
    .vip-star {
      color: var(--accent-gold);
      font-size: 1rem;
    }
    .hero-h1 {
      font-size: 2.85rem;
      line-height: 1.25;
      font-weight: 900;
      color: #FFFFFF;
      margin-bottom: 22px;
      letter-spacing: -0.02em;
    }
    .hero-h1 .gold-text {
      background: linear-gradient(135deg, #FDE68A 0%, #F59E0B 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-p {
      font-size: 1.125rem;
      line-height: 1.85;
      color: #CBD5E1;
      margin-bottom: 34px;
      max-width: 660px;
    }
    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .btn-gold {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
      color: #111827;
      font-weight: 700;
      font-size: 1rem;
      padding: 14px 28px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-gold);
      border: none;
    }
    .btn-gold:hover {
      background: linear-gradient(135deg, #FBBF24 0%, #F59E0B 100%);
      color: #000;
      transform: translateY(-2px);
    }
    .btn-outline-cyan {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: rgba(16, 185, 129, 0.08);
      color: #34D399;
      font-weight: 600;
      font-size: 1rem;
      padding: 14px 26px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(16, 185, 129, 0.4);
    }
    .btn-outline-cyan:hover {
      background: rgba(16, 185, 129, 0.18);
      color: #6EE7B7;
    }
    .hero-vip-tiers {
      background: rgba(30, 41, 59, 0.7);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-md);
      backdrop-filter: blur(10px);
    }
    .vip-tier-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .vip-tier-item:last-child { border-bottom: none; }
    .tier-label { font-weight: 700; color: #F1F5F9; font-size: 0.95rem; }
    .tier-badge {
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: rgba(245, 158, 11, 0.15);
      color: #FBBF24;
      border: 1px solid rgba(245, 158, 11, 0.3);
    }

    /* 模块2：品类入口 */
    .category-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 24px;
    }
    .category-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .category-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .cat-icon-wrap {
      width: 48px;
      height: 48px;
      background: #ECFDF5;
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.35rem;
      margin-bottom: 18px;
    }
    .cat-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .cat-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .cat-meta-tag {
      display: inline-block;
      font-size: 0.78rem;
      color: var(--secondary-dark);
      background: #EEF2FF;
      padding: 2px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    /* 模块3：附近推荐/区域节点集群 */
    .node-card {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .node-card:hover {
      border-color: var(--secondary);
      box-shadow: var(--shadow-md);
    }
    .node-header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 14px;
    }
    .node-city {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .node-ping {
      font-size: 0.8rem;
      font-weight: 700;
      color: #059669;
      background: #D1FAE5;
      padding: 2px 8px;
      border-radius: 99px;
    }
    .node-spec-list {
      list-style: none;
      margin: 0 0 16px 0;
      padding: 0;
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .node-spec-list li {
      margin-bottom: 6px;
      display: flex;
      justify-content: space-between;
    }

    /* 模块4：口碑榜与热度排行 */
    .rank-list-box {
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 10px;
      box-shadow: var(--shadow-sm);
    }
    .rank-item {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      border-bottom: 1px solid #F1F5F9;
    }
    .rank-item:last-child { border-bottom: none; }
    .rank-item:hover { background: #F8FAFC; }
    .rank-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: #F1F5F9;
      color: var(--text-muted);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
    }
    .rank-num.top-1 { background: #FEF3C7; color: #D97706; }
    .rank-num.top-2 { background: #E0E7FF; color: #4F46E5; }
    .rank-num.top-3 { background: #D1FAE5; color: #059669; }
    .rank-info { flex: 1; }
    .rank-title { font-weight: 700; font-size: 1.05rem; color: var(--text-main); margin-bottom: 4px; }
    .rank-meta { font-size: 0.84rem; color: var(--text-muted); }
    .rank-data { text-align: right; }
    .rank-score { font-size: 1.1rem; font-weight: 800; color: var(--primary-dark); }
    .rank-label { font-size: 0.75rem; color: var(--text-muted); display: block; }

    /* 模块5：保障承诺 */
    .guarantee-box {
      background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 40px;
      color: #fff;
    }
    .guarantee-item {
      padding: 20px;
      border-left: 3px solid var(--primary);
      background: rgba(255, 255, 255, 0.03);
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      margin-bottom: 20px;
    }
    .guarantee-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #34D399;
      margin-bottom: 8px;
    }
    .guarantee-desc {
      font-size: 0.92rem;
      line-height: 1.7;
      color: #94A3B8;
      margin: 0;
    }

    /* 模块6：上线与联调到店流程 */
    .timeline-steps {
      position: relative;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }
    .step-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-badge {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }
    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin: 0;
    }

    /* 模块7：技术架构深度解析 */
    .arch-panel {
      background: #0B1120;
      border: 1px solid #1E293B;
      border-radius: var(--radius-lg);
      padding: 36px;
      color: #E2E8F0;
    }
    .arch-spec-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }
    .arch-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--secondary);
      margin-top: 6px;
      flex-shrink: 0;
    }
    .arch-spec-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-bottom: 4px;
    }
    .arch-spec-desc {
      font-size: 0.9rem;
      color: #94A3B8;
      line-height: 1.65;
    }

    /* 模块8：行业实战场景矩阵 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }
    .scenario-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .scenario-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .scenario-img-box {
      height: 170px;
      overflow: hidden;
      background: #E2E8F0;
    }
    .scenario-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      border-radius: 0;
      transition: var(--transition);
    }
    .scenario-card:hover .scenario-img-box img {
      transform: scale(1.05);
    }
    .scenario-body {
      padding: 22px;
    }
    .scenario-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .scenario-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 14px;
    }
    .scenario-kpi {
      font-size: 0.82rem;
      color: var(--primary-dark);
      font-weight: 700;
      background: #ECFDF5;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
    }

    /* 模块9：关键业务运行指标 */
    .stats-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      text-align: center;
    }
    .stat-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px 20px;
      box-shadow: var(--shadow-sm);
    }
    .stat-number {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .stat-number span {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      margin-left: 2px;
    }
    .stat-label {
      font-size: 0.92rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 模块10：开发者反馈与社会认证 */
    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .t-quote {
      font-size: 0.95rem;
      line-height: 1.75;
      color: var(--text-body);
      margin-bottom: 20px;
      font-style: italic;
    }
    .t-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .t-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary), var(--primary));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1rem;
    }
    .t-name { font-weight: 700; font-size: 0.95rem; color: var(--text-main); margin: 0; }
    .t-role { font-size: 0.8rem; color: var(--text-muted); margin: 0; }

    /* 模块11：行业资讯与研发动态 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
      gap: 24px;
    }
    .news-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .news-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--secondary);
    }
    .news-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }
    .news-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.45;
      margin-bottom: 12px;
    }
    .news-excerpt {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 18px;
    }
    .news-link {
      font-weight: 600;
      font-size: 0.88rem;
      color: var(--secondary-dark);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 模块12：预约开通与联调行动区 */
    #cta {
      background: linear-gradient(135deg, #0F172A 0%, #1E1B4B 100%);
      border-radius: var(--radius-lg);
      padding: 56px 40px;
      color: #fff;
      text-align: center;
      box-shadow: var(--shadow-md);
      border: 1px solid rgba(255, 255, 255, 0.12);
    }
    .cta-inner-title {
      font-size: 2.2rem;
      font-weight: 800;
      margin-bottom: 18px;
      color: #FFFFFF;
    }
    .cta-inner-desc {
      font-size: 1.05rem;
      color: #CBD5E1;
      max-width: 680px;
      margin: 0 auto 36px auto;
      line-height: 1.8;
    }
    .cta-btn-wrap {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 页脚 Footer */
    .site-footer {
      background: #090E17;
      color: #94A3B8;
      padding: 64px 0 32px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.875rem;
    }
    .footer-brand {
      color: #fff;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .footer-desc {
      line-height: 1.7;
      margin-bottom: 20px;
      max-width: 320px;
    }
    .footer-heading {
      color: #F1F5F9;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 18px;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links li a {
      color: #94A3B8;
      transition: var(--transition);
    }
    .footer-links li a:hover {
      color: #34D399;
    }
    .footer-bottom {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 0.8125rem;
    }

    /* 响应式断点控制 */
    @media (max-width: 1023px) {
      .nav-links { display: none; }
      .hero-h1 { font-size: 2.2rem; }
      .section-wrap { padding: 60px 0; }
    }
    @media (max-width: 767px) {
      .section-wrap { padding: 48px 0; }
      .hero-h1 { font-size: 1.85rem; }
      .hero-p { font-size: 1rem; }
      .section-title { font-size: 1.6rem; }
      #cta { padding: 40px 20px; }
      .cta-inner-title { font-size: 1.65rem; }
      .guarantee-box { padding: 24px 16px; }
      .arch-panel { padding: 24px 16px; }
    }