/* roulang page: index */
:root {
      --primary: #5B42F5;
      --secondary: #00D4FF;
      --accent: #FF8C38;
      --bg-light: #F8FAFC;
      --card-border: rgba(226, 232, 240, 0.85);
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .gradient-brand {
      background: linear-gradient(135deg, #5B42F5 0%, #00D4FF 100%);
    }
    .gradient-brand-text {
      background: linear-gradient(135deg, #5B42F5 0%, #00D4FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .gradient-dark-banner {
      background: linear-gradient(135deg, #0A0F1D 0%, #151d38 100%);
    }
    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid var(--card-border);
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(91, 66, 245, 0.12), 0 8px 10px -6px rgba(0, 212, 255, 0.08);
      border-color: rgba(91, 66, 245, 0.3);
    }