/* ================= CSS 变量定义 ================= */
:root {
  --bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --panel: rgba(255, 255, 255, 0.08);
  --panel-hover: rgba(255, 255, 255, 0.12);
  --card: rgba(255, 255, 255, 0.95);
  --card-gradient: linear-gradient(145deg, rgba(255,255,255,0.98) 0%, rgba(248,250,252,0.95) 100%);
  --text: #1e293b;
  --muted: #64748b;
  --line: rgba(255, 255, 255, 0.1);
  --primary: #6366f1;
  --primary-glow: rgba(99, 102, 241, 0.4);
  --danger: #ef4444;
  --ok: #10b981;
  --warning: #f59e0b;
  --accent-1: #06b6d4;
  --accent-2: #8b5cf6;
  --accent-3: #ec4899;
  --accent-4: #f97316;
}