/* roulang page: index */
:root {
      --color-primary: #0A2540;
      --color-accent: #C5A880;
      --bg-slate: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.65;
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(10, 37, 64, 0.94) 0%, rgba(6, 25, 44, 0.88) 100%), url('/assets/images/60830eed54405161.webp');
      background-size: cover;
      background-position: center;
    }
    .badge-subtle {
      background: rgba(197, 168, 128, 0.12);
      color: #926c34;
      border: 1px solid rgba(197, 168, 128, 0.35);
    }
    .card-hover {
      transition: all 0.28s ease;
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -8px rgba(10, 37, 64, 0.12);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details summary {
      list-style: none;
    }
    details[open] .arrow-icon {
      transform: rotate(180deg);
    }