/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-hover: #1442a6;
      --secondary: #0EA5E9;
      --accent-green: #10B981;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-dark: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
      --dark-section: #0F172A;
      --card-radius: 16px;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-body);
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: all 0.25s ease;
    }
    a:hover {
      color: var(--primary-hover);
    }

    /* 顶部微型双行导航 */
    .top-bar {
      background-color: #F1F5F9;
      font-size: 0.825rem;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-color);
      padding: 6px 0;
    }
    .top-bar a {
      color: var(--text-muted);
    }
    .top-bar a:hover {
      color: var(--primary);
    }

    .main-navbar {
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .navbar-brand {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--text-dark) !important;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .brand-icon {
      width: 32px;
      height: 32px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      font-size: 1rem;
    }
    .nav-link {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-body) !important;
      padding: 8px 16px !important;
      border-radius: 8px;
      transition: all 0.2s ease;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary) !important;
      background-color: rgba(26, 86, 219, 0.06);
    }

    /* 面包屑辅助条 */
    .breadcrumb-strip {
      background-color: #FFFFFF;
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
      padding: 8px 0;
      font-size: 0.85rem;
    }
    .breadcrumb {
      margin-bottom: 0;
    }
    .breadcrumb-item + .breadcrumb-item::before {
      content: "›";
      color: var(--text-muted);
    }

    /* 板块通用间距与标题 */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background-color: rgba(26, 86, 219, 0.08);
      color: var(--primary);
      padding: 5px 14px;
      border-radius: 999px;
      font-size: 0.825rem;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 50px auto;
      line-height: 1.7;
    }

    /* 卡片与按钮 */
    .app-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--card-radius);
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      height: 100%;
      overflow: hidden;
    }
    .app-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .btn-pill {
      border-radius: 999px;
      padding: 11px 26px;
      font-weight: 600;
      font-size: 0.95rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      transition: all 0.25s ease;
    }
    .btn-primary-pill {
      background-color: var(--primary);
      color: #fff;
      border: 1px solid var(--primary);
    }
    .btn-primary-pill:hover {
      background-color: var(--primary-hover);
      color: #fff;
      box-shadow: 0 4px 12px rgba(26, 86, 219, 0.25);
    }
    .btn-outline-pill {
      background-color: transparent;
      color: var(--text-dark);
      border: 1px solid #CBD5E1;
    }
    .btn-outline-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: rgba(26, 86, 219, 0.04);
    }

    /* 1. Hero 板块（无大图，状态条+图标矩阵） */
    #hero {
      background: linear-gradient(180deg, #FFFFFF 0%, #F1F5F9 100%);
      padding: 60px 0 80px 0;
    }
    .status-badge-bar {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 6px 18px;
      border-radius: 50px;
      font-size: 0.875rem;
      color: var(--text-body);
      box-shadow: 0 2px 5px rgba(0,0,0,0.03);
      margin-bottom: 24px;
    }
    .pulse-dot {
      width: 9px;
      height: 9px;
      background-color: var(--accent-green);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }
    .hero-h1 {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--text-dark);
      line-height: 1.25;
      letter-spacing: -0.8px;
      margin-bottom: 20px;
    }
    .hero-lead {
      font-size: 1.125rem;
      color: var(--text-muted);
      line-height: 1.75;
      max-width: 760px;
      margin: 0 auto 32px auto;
    }
    .hero-icon-grid {
      margin-top: 45px;
    }
    .hero-icon-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 20px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .hero-icon-box i {
      font-size: 1.75rem;
      color: var(--primary);
      margin-bottom: 10px;
    }
    .hero-icon-box h3 {
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--text-dark);
    }
    .hero-icon-box p {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin: 0;
    }

    /* 2. 入口矩阵 */
    .portal-card {
      padding: 28px;
      border-left: 4px solid var(--primary);
    }
    .portal-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 16px;
    }

    /* 3. 产品定位与标准验证 */
    .verify-box {
      background: #EFF6FF;
      border: 1px solid #BFDBFE;
      border-radius: 12px;
      padding: 20px;
      margin-top: 24px;
    }

    /* 5. 深色理念与架构 */
    #philosophy {
      background-color: var(--dark-section);
      color: #94A3B8;
    }
    #philosophy .section-title {
      color: #FFFFFF;
    }
    .dark-card {
      background: #1E293B;
      border: 1px solid #334155;
      border-radius: var(--card-radius);
      padding: 26px;
      color: #E2E8F0;
    }
    .dark-card h3 {
      color: #FFFFFF;
      font-size: 1.15rem;
      margin-bottom: 12px;
    }

    /* 7. 指标数据条 */
    #metrics {
      background: linear-gradient(135deg, var(--primary) 0%, #0F3B99 100%);
      color: #FFFFFF;
      padding: 60px 0;
    }
    .metric-value {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 0.95rem;
      opacity: 0.85;
    }

    /* 手风琴优化 */
    .accordion-item {
      background: transparent;
      border: 1px solid var(--border-color) !important;
      border-radius: 12px !important;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-button {
      font-weight: 600;
      color: var(--text-dark);
      background-color: #FFFFFF;
      padding: 18px 24px;
      box-shadow: none !important;
    }
    .accordion-button:not(.collapsed) {
      color: var(--primary);
      background-color: #F8FAFC;
    }
    .accordion-body {
      color: var(--text-muted);
      line-height: 1.7;
      padding: 18px 24px;
      background-color: #FFFFFF;
      border-top: 1px solid var(--border-color);
    }

    /* 页脚 */
    footer {
      background-color: #0B1120;
      color: #64748B;
      font-size: 0.875rem;
      border-top: 1px solid #1E293B;
    }
    footer h4 {
      color: #F8FAFC;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    footer ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    footer ul li {
      margin-bottom: 10px;
    }
    footer a {
      color: #94A3B8;
    }
    footer a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding: 24px 0;
      text-align: center;
      font-size: 0.8rem;
    }

    /* 移动端细化 */
    @media (max-width: 768px) {
      .hero-h1 {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.75rem;
      }
      section {
        padding: 55px 0;
      }
      .btn-pill {
        min-height: 48px;
        width: 100%;
      }
    }