/* roulang page: index */
:root {
      --primary: #2563EB;
      --primary-dark: #1D4ED8;
      --slate-900: #0F172A;
      --slate-800: #1E293B;
      --slate-100: #F1F5F9;
      --slate-50: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--slate-50);
      color: #334155;
      overflow-x: hidden;
    }
    .text-title {
      color: var(--slate-900);
      letter-spacing: -0.02em;
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(11, 15, 25, 0.98) 100%);
    }
    .nav-blur {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-track {
      background: #F1F5F9;
      border-radius: 4px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }