/* roulang page: index */
:root {
      --primary-teal: #0F766E;
      --primary-dark: #0D9488;
      --accent-mint: #10B981;
      --surface-dark: #0F172A;
      --surface-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 4px;
    }
    .skew-hero {
      clip-path: polygon(0 0, 100% 0, 100% calc(100% - 3.5vw), 0 100%);
    }
    @media (max-width: 768px) {
      .skew-hero {
        clip-path: none;
      }
    }
    .card-hover {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -6px rgba(15, 23, 42, 0.12);
    }