/* roulang page: index */
:root {
      --primary: #0284c7;
      --primary-dark: #0369a1;
      --accent: #0d9488;
      --bg-light: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #475569;
      --card-border: #e2e8f0;
      --shadow-sm: 0 2px 8px -2px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 8px 24px -4px rgba(15, 23, 42, 0.08);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(2, 132, 199, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
    }
    .custom-card {
      background: #ffffff;
      border: 1px solid var(--card-border);
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
    }
    .custom-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
      transform: translateY(-2px);
    }