/* roulang page: index */
:root {
      --primary: #0C1929;
      --accent: #00D494;
      --secondary: #2E5CFF;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --bg-dark: #070E17;
      --text-main: #0A111A;
      --text-muted: #475569;
      --text-light: #94A3B8;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .code-font {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(0, 212, 148, 0.15) 0%, rgba(12, 25, 41, 0) 70%);
    }
    .circuit-bg {
      background-image: radial-gradient(rgba(0, 212, 148, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 32px -8px rgba(12, 25, 41, 0.1);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .btn-glow {
      box-shadow: 0 0 15px rgba(0, 212, 148, 0.4);
    }
    .btn-glow:hover {
      box-shadow: 0 0 25px rgba(0, 212, 148, 0.7);
    }