/* roulang page: index */
:root {
      --primary: #1D4ED8;
      --primary-hover: #2563EB;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #334155;
      --text-sub: #64748B;
      --border-color: #E2E8F0;
      --card-radius: 1rem;
      --btn-radius: 0.5rem;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-muted);
      background-color: var(--bg-light);
    }
    .custom-container {
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }
    @media (min-width: 768px) {
      .custom-container {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(29, 78, 216, 0.82) 100%);
    }
    .hud-card-shadow {
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    .accordion-content {
      transition: max-height 0.3s ease-out, opacity 0.2s ease;
    }