/* roulang page: index */
:root {
      --primary: #1d4ed8;
      --accent: #f97316;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8fafc;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.7;
    }
    .hero-bg {
      background-image: linear-gradient(rgba(15, 23, 42, 0.82), rgba(15, 23, 42, 0.9)), url('/assets/images/e215ad328d28473b.jpg');
      background-size: cover;
      background-position: center;
    }
    details summary::-webkit-details-marker {
      display: none;
    }