/* roulang page: index */
:root {
      --brand-cyan: #00f0ff;
      --brand-violet: #8b5cf6;
      --bg-dark: #070b19;
      --card-bg: rgba(13, 22, 48, 0.72);
      --border-cyan: rgba(0, 240, 255, 0.22);
    }
    body {
      background-color: #050814;
      color: #cbd5e1;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .neon-glow {
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.35);
    }
    .neon-glow-hover:hover {
      box-shadow: 0 0 30px rgba(0, 240, 255, 0.55);
    }
    .neon-text {
      text-shadow: 0 0 14px rgba(0, 240, 255, 0.6);
    }
    .glass-panel {
      background: var(--card-bg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--border-cyan);
    }
    .hero-grid-bg {
      background-image: linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
      background-size: 40px 40px;
    }
    .code-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .code-scroll::-webkit-scrollbar-thumb {
      background: #1e293b;
      border-radius: 9999px;
    }
    .glow-border-bottom {
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
    }

/* roulang page: category1 */
:root {
      --brand-cyan: #00f0ff;
      --brand-violet: #8b5cf6;
      --bg-dark: #070b19;
      --card-bg: rgba(13, 22, 48, 0.72);
      --border-cyan: rgba(0, 240, 255, 0.22);
    }
    body {
      background-color: #050814;
      color: #cbd5e1;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .hero-grid-bg {
      background-image: linear-gradient(rgba(0, 240, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(90deg, rgba(0, 240, 255, 0.05) 1px, transparent 1px);
      background-size: 40px 40px;
    }
    .glow-border-bottom {
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
    }
    .neon-glow {
      box-shadow: 0 0 20px rgba(0, 240, 255, 0.35);
    }
    .neon-glow-lg {
      box-shadow: 0 0 35px rgba(0, 240, 255, 0.45);
    }
    .neon-border {
      border: 1px solid rgba(0, 240, 255, 0.3);
    }
    .neon-border-hover:hover {
      border-color: rgba(0, 240, 255, 0.7);
      box-shadow: 0 0 25px rgba(0, 240, 255, 0.3);
    }
    .glass-card {
      background: rgba(13, 22, 48, 0.68);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(0, 240, 255, 0.18);
    }
    .glass-card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card-hover:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 240, 255, 0.45);
      box-shadow: 0 12px 30px -10px rgba(0, 240, 255, 0.25);
    }
    .custom-scrollbar::-webkit-scrollbar {
      height: 4px;
    }
    .custom-scrollbar::-webkit-scrollbar-track {
      background: rgba(15, 23, 42, 0.6);
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: rgba(0, 240, 255, 0.4);
      border-radius: 4px;
    }