/* roulang page: index */
:root {
      --primary: #0F172A;
      --primary-light: #1E293B;
      --brand-blue: #2563EB;
      --brand-cyan: #06B6D4;
      --brand-orange: #F97316;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .hero-skew-bg {
      background: linear-gradient(135deg, #0F172A 0%, #1E293B 55%, #172554 100%);
      clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
    }
    @media (max-width: 768px) {
      .hero-skew-bg {
        clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
      }
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    .tab-active {
      border-color: #2563EB;
      color: #2563EB;
      background-color: #EFF6FF;
    }
    .glass-card {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
    }