/* roulang page: index */
:root {
      --brand-primary: #1E40AF;
      --brand-secondary: #3B82F6;
      --brand-accent: #EA580C;
      --bg-page: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --card-border: #E2E8F0;
    }
    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-card-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05), 0 2px 6px -2px rgba(15, 23, 42, 0.03);
    }
    .custom-card-hover {
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 28px -6px rgba(30, 64, 175, 0.12), 0 6px 12px -4px rgba(30, 64, 175, 0.06);
    }