/* roulang page: index */
:root {
      --bg-dark: #120B1F;
      --bg-surface: #1E1530;
      --neon-cyan: #00FFCC;
      --magic-pink: #FF2A85;
      --text-main: #FFFFFF;
      --text-muted: #D1D5DB;
    }
    * {
      box-sizing: border-box;
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--bg-dark);
      color: var(--text-muted);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .neon-glow-cyan {
      box-shadow: 0 0 25px rgba(0, 255, 204, 0.35);
    }
    .neon-glow-pink {
      box-shadow: 0 0 25px rgba(255, 42, 133, 0.35);
    }
    .text-glow {
      text-shadow: 0 0 15px rgba(0, 255, 204, 0.45);
    }
    .border-gradient {
      border: 1px solid rgba(0, 255, 204, 0.2);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .border-gradient:hover {
      border-color: rgba(0, 255, 204, 0.7);
      transform: translateY(-4px);
    }
    /* 手风琴状态过渡 */
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
      color: #00FFCC;
    }
    details[open] {
      border-left: 3px solid #00FFCC;
    }