/* roulang page: index */
:root {
      --color-primary: #0F52BA;
      --color-secondary: #0D9488;
      --color-accent: #F59E0B;
      --color-bg: #F8FAFC;
      --color-dark: #0F172A;
      --color-text: #334155;
      --color-muted: #64748B;
    }
    body {
      background-color: var(--color-bg);
      color: var(--color-text);
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    .custom-gradient-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 82, 186, 0.88) 100%);
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 82, 186, 0.1), 0 8px 10px -6px rgba(15, 82, 186, 0.08);
    }
    details summary::-webkit-details-marker {
      display: none;
    }