/* roulang page: index */
:root {
      --primary-cyan: #00F0FF;
      --primary-emerald: #10B981;
      --accent-orange: #FF5E1E;
      --bg-dark: #0B0F19;
      --bg-dark-card: #131B2E;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 84px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, "Noto Sans SC", sans-serif;
      color: var(--text-body);
      line-height: 1.75;
      background-color: #F8FAFC;
    }
    .text-gradient {
      background: linear-gradient(135deg, #10B981 0%, #00F0FF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .bg-gradient-tech {
      background: linear-gradient(135deg, #0B0F19 0%, #131E36 100%);
    }
    .neon-border {
      border: 1px solid rgba(0, 240, 255, 0.25);
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.08);
    }
    .neon-border:hover {
      border-color: rgba(0, 240, 255, 0.55);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.2);
    }
    .card-transition {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-transition:hover {
      transform: translateY(-5px);
    }