/* roulang page: index */
:root {
      --bg-main: #0B0E14;
      --bg-surface: #131822;
      --bg-card: #181F2C;
      --border-color: #263143;
      --brand-green: #00E599;
      --brand-green-hover: #00C882;
      --text-main: #F3F4F6;
      --text-muted: #8B9BB4;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .neon-border {
      border: 1px solid rgba(0, 229, 153, 0.25);
      box-shadow: 0 0 25px rgba(0, 229, 153, 0.08);
    }
    .neon-border:hover {
      border-color: rgba(0, 229, 153, 0.6);
      box-shadow: 0 0 35px rgba(0, 229, 153, 0.16);
    }
    .glass-nav {
      background: rgba(11, 14, 20, 0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border-color);
    }
    .custom-scroll::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #263143;
      border-radius: 3px;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }