/* roulang page: index */
:root {
      --primary: #15803D;
      --primary-dark: #166534;
      --accent: #F97316;
      --slate-dark: #0F172A;
      --slate-deep: #0B132B;
      --slate-border: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .hero-glow {
      box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    }
    .glass-dark {
      background: rgba(15, 23, 42, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .glass-light {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(226, 232, 240, 0.8);
    }
    .card-transition {
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 30px -8px rgba(15, 23, 42, 0.12);
    }