/* roulang page: index */
:root {
      --color-brand: #00F2FE;
      --color-brand-glow: rgba(0, 242, 254, 0.35);
      --color-bg-base: #0B0E14;
      --color-bg-card: #181F2C;
      --color-border: rgba(255, 255, 255, 0.08);
      --font-stack: system-ui, -apple-system, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--color-bg-base);
      color: #FFFFFF;
      overflow-x: hidden;
      line-height: 1.65;
    }
    .neon-border {
      border: 1px solid var(--color-border);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .neon-border:hover {
      border-color: rgba(0, 242, 254, 0.5);
      box-shadow: 0 0 25px var(--color-brand-glow);
      transform: translateY(-2px);
    }
    .btn-glow {
      transition: all 0.3s ease;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.2);
    }
    .btn-glow:hover {
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.5);
      transform: translateY(-1px);
    }
    /* 手风琴原生增强 */
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }