/* 城市图集：道路、地标与定位点均为本地 Canvas 绘制，不加载地图瓦片或外部追踪器。 */
.city-atlas { position: fixed; inset: 0; z-index: -1; width: 100%; height: 100%; pointer-events: none; opacity: .76; }
.city-atlas.is-rerouting { animation: atlas-shift 900ms var(--ease) both; }
@keyframes atlas-shift { 0% { opacity: .1; } 100% { opacity: .76; } }
@media (prefers-color-scheme: dark) { .city-atlas { opacity: .48; } }
@media (prefers-reduced-motion: reduce) { .city-atlas { animation: none !important; } }