/* roulang page: index */
:root {
      --primary: #1e40af;
      --primary-hover: #1d4ed8;
      --accent: #f59e0b;
      --text-main: #0f172a;
      --text-muted: #334155;
      --text-sub: #64748b;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-page);
      overflow-x: hidden;
      line-height: 1.75;
    }
    .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-glow {
      background: radial-gradient(circle at 50% 30%, rgba(30, 64, 175, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
    }