/* roulang page: index */
:root {
      --primary: #0f4c81;
      --primary-dark: #0b1b3d;
      --accent: #ea580c;
      --slate-main: #0f172a;
      --slate-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .grid-pattern {
      background-image: radial-gradient(rgba(15, 76, 129, 0.08) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(11, 27, 61, 0.92) 0%, rgba(15, 76, 129, 0.82) 100%);
    }
    .card-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      transition: all 0.25s ease-in-out;
    }
    .card-shadow:hover {
      box-shadow: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
      transform: translateY(-2px);
    }