/* roulang page: index */
:root {
      --bg-dark: #0A0F1D;
      --bg-deep: #0F172A;
      --bg-card: rgba(19, 28, 49, 0.72);
      --primary-blue: #0066FF;
      --primary-cyan: #00F0FF;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --border-line: rgba(255, 255, 255, 0.08);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --glow-shadow: 0 0 25px rgba(0, 240, 255, 0.28);
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
      line-height: 1.75;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-line);
      border-radius: var(--radius-md);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.3);
      box-shadow: 0 10px 30px -10px rgba(0, 102, 255, 0.25);
      transform: translateY(-2px);
    }
    .glow-btn {
      background: linear-gradient(90deg, #0066FF 0%, #00F0FF 100%);
      box-shadow: var(--glow-shadow);
      transition: all 0.3s ease;
      position: relative;
      z-index: 1;
    }
    .glow-btn:hover {
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.5);
      transform: scale(1.02);
    }
    .border-glow {
      border: 1px solid rgba(0, 240, 255, 0.3);
      box-shadow: inset 0 0 15px rgba(0, 240, 255, 0.1);
    }
    .metric-num {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }