/* roulang page: index */
:root {
      --primary-color: #1E3A8A;
      --accent-color: #EA580C;
      --bg-surface: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      line-height: 1.75;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(30, 58, 138, 0.88) 100%);
    }
    .focus-ring:focus {
      outline: 2px solid var(--accent-color);
      outline-offset: 2px;
    }