/* roulang page: index */
:root {
      --bg-main: #0D1117;
      --bg-card: #161B22;
      --border-line: #30363D;
      --text-pure: #F3F4F6;
      --text-sub: #9CA3AF;
      --brand-green: #10B981;
      --brand-neon: #00FF87;
      --brand-purple: #8B5CF6;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-pure);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
      line-height: 1.65;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(16, 185, 129, 0.15) 0%, rgba(13, 17, 23, 0) 70%);
    }
    .neon-border {
      border: 1px solid var(--border-line);
      transition: all 0.25s ease-in-out;
    }
    .neon-border:hover {
      border-color: rgba(16, 185, 129, 0.5);
      transform: translateY(-4px);
      box-shadow: 0 10px 25px -5px rgba(16, 185, 129, 0.2);
    }
    .code-console {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
      background: #090d13;
      border: 1px solid #21262d;
    }
    .glow-btn {
      transition: all 0.2s ease;
      box-shadow: 0 0 15px rgba(16, 185, 129, 0.35);
    }
    .glow-btn:hover {
      box-shadow: 0 0 25px rgba(0, 255, 135, 0.6);
      transform: translateY(-1px);
    }
    .faq-answer {
      transition: max-height 0.3s ease, opacity 0.3s ease;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .faq-answer.open {
      max-height: 320px;
      opacity: 1;
    }
    /* Mobile sticky padding fix */
    @media (max-width: 768px) {
      body {
        padding-bottom: 74px;
      }
    }