html,body{margin:0;padding:0;width:100%;height:100%;overflow:hidden;background:#111318;font-family:Segoe UI,Microsoft YaHei,system-ui,sans-serif;color:#e8e6df}#app{position:fixed;inset:0}canvas{display:block}#hud{position:fixed;inset:0;pointer-events:none;z-index:10}