/* roulang page: index */
:root {
        --color-primary: #0F172A;
        --color-cobalt: #1E40AF;
        --color-cyan: #0EA5E9;
        --color-bg-light: #F8FAFC;
        --color-border: #E2E8F0;
        --transition-standard: all 200ms cubic-bezier(0.4, 0, 0.2, 1);
      }
      *, *::before, *::after {
        box-sizing: border-box;
      }
      body {
        margin: 0;
        padding: 0;
        background-color: #FFFFFF;
        color: #1E293B;
        font-family: system-ui, -apple-system, "PingFang SC", "HarmonyOS Sans", "Microsoft YaHei", sans-serif;
        line-height: 1.75;
        overflow-x: hidden;
      }
      .custom-card {
        background: #FFFFFF;
        border: 1px solid #E2E8F0;
        border-radius: 12px;
        box-shadow: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.02);
        transition: var(--transition-standard);
      }
      .custom-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 24px -4px rgba(15, 23, 42, 0.08), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
        border-color: #CBD5E1;
      }
      .tab-btn.active {
        background-color: #1E40AF;
        color: #FFFFFF;
        box-shadow: 0 4px 12px rgba(30, 64, 175, 0.25);
      }
      .badge-tag {
        display: inline-flex;
        align-items: center;
        padding: 2px 10px;
        font-size: 0.75rem;
        font-weight: 600;
        border-radius: 9999px;
      }
      details > summary::-webkit-details-marker {
        display: none;
      }
      .glass-nav {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
      }
      .hero-gradient {
        background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 64, 175, 0.88) 100%);
      }
      .matrix-table th, .matrix-table td {
        padding: 16px 20px;
        border-bottom: 1px solid #E2E8F0;
      }
      .matrix-table tr:last-child td {
        border-bottom: none;
      }