/* roulang page: index */
:root {
      --bg-dark: #0B0F17;
      --card-bg: #131B26;
      --card-hover: #1B2535;
      --brand-cyan: #00F5D4;
      --brand-purple: #7928CA;
      --brand-orange: #FF6B00;
      --border-subtle: rgba(255, 255, 255, 0.08);
      --border-glow: rgba(0, 245, 212, 0.35);
    }
    body {
      background-color: var(--bg-dark);
      color: #FFFFFF;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .hero-glow-bg {
      background: radial-gradient(circle at 50% 25%, rgba(0, 245, 212, 0.12) 0%, rgba(121, 40, 202, 0.08) 35%, transparent 70%);
    }
    .custom-card {
      background: #131B26;
      border: 1px solid var(--border-subtle);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-card:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 245, 212, 0.4);
      box-shadow: 0 12px 30px -10px rgba(0, 245, 212, 0.15);
    }
    .glass-nav {
      background: rgba(11, 15, 23, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .text-gradient {
      background: linear-gradient(135deg, #FFFFFF 30%, #00F5D4 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .stat-number {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
    }