/* roulang page: index */
:root {
      --primary: #3B3E79;
      --primary-dark: #2D3162;
      --teal: #0EA5E9;
      --emerald: #10B981;
      --bg-slate: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .hero-skew-shape {
      clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
    }
    @media (max-width: 768px) {
      .hero-skew-shape {
        clip-path: polygon(0 0, 100% 0, 100% 95%, 0 100%);
      }
    }
    .glass-nav {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow:hover {
      box-shadow: 0 20px 40px -15px rgba(15, 23, 42, 0.16);
      transform: translateY(-4px);
    }
    details > summary::-webkit-details-marker {
      display: none;
    }