/* roulang page: index */
:root {
      --primary: #1D4ED8;
      --primary-hover: #1E40AF;
      --secondary: #0284C7;
      --accent: #10B981;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 10px 30px -5px rgba(15, 23, 42, 0.06), 0 4px 6px -2px rgba(15, 23, 42, 0.03);
    }
    .hover-lift {
      transition: all 0.25s ease-in-out;
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -8px rgba(29, 78, 216, 0.12);
    }
    .tab-active {
      border-bottom: 2px solid #1D4ED8;
      color: #1D4ED8;
      font-weight: 600;
    }