* { box-sizing: border-box; }
html, body { width: 100%; height: 100%; margin: 0; overflow: hidden; background: #0a101a; }
body { display: flex; align-items: center; justify-content: center; font-family: Arial, sans-serif; }
#GameDiv { position: relative; width: 100%; height: 100%; outline: none; }
#Cocos3dGameContainer, #GameCanvas { width: 100%; height: 100%; }
canvas { display: block; outline: none; touch-action: none; }
body, canvas, div { user-select: none; -webkit-user-select: none; -webkit-tap-highlight-color: transparent; }