/* roulang page: index */
:root {
      --bg-main: #0B0D13;
      --bg-card: #121622;
      --bg-card-alt: #181D2C;
      --gold-primary: #F59E0B;
      --gold-secondary: #D97706;
      --arcane-cyan: #06B6D4;
      --text-main: #F8FAFC;
      --text-muted: #CBD5E1;
      --text-sub: #64748B;
      --border-gold: rgba(245, 158, 11, 0.22);
      --border-light: rgba(255, 255, 255, 0.08);
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    body {
      background-color: var(--bg-main);
      color: var(--text-muted);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      line-height: 1.75;
    }

    .num-tabular {
      font-variant-numeric: tabular-nums;
    }

    .card-border-glow {
      border: 1px solid var(--border-gold);
      box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
      transition: var(--transition-smooth);
    }
    .card-border-glow:hover {
      transform: translateY(-6px);
      border-color: rgba(245, 158, 11, 0.45);
      box-shadow: 0 16px 32px -8px rgba(245, 158, 11, 0.25);
    }

    .btn-gold {
      background: linear-gradient(135deg, #F59E0B 0%, #D97706 100%);
      color: #07080C;
      font-weight: 700;
      transition: var(--transition-smooth);
      position: relative;
      overflow: hidden;
    }
    .btn-gold:hover {
      filter: brightness(1.1);
      box-shadow: 0 0 18px rgba(245, 158, 11, 0.4);
    }

    .btn-outline-arcane {
      border: 1px solid var(--arcane-cyan);
      color: var(--arcane-cyan);
      transition: var(--transition-smooth);
    }
    .btn-outline-arcane:hover {
      background-color: rgba(6, 182, 212, 0.12);
      box-shadow: 0 0 14px rgba(6, 182, 212, 0.3);
    }

    .glass-nav {
      background: rgba(11, 13, 19, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(245, 158, 11, 0.15);
    }

    .section-pattern {
      background-image: radial-gradient(rgba(245, 158, 11, 0.04) 1px, transparent 1px);
      background-size: 28px 28px;
    }

    /* 手风琴动画 */
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }