*{margin:0;padding:0;box-sizing:border-box}html,body{width:100%;height:100%;overflow:hidden;background:#000;overscroll-behavior:none;touch-action:none;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent}#game{width:100%;height:100%;display:flex;align-items:center;justify-content:center}#game canvas{display:block}#rotate-hint{display:none}@media(orientation:portrait)and (pointer:coarse)and (max-width:820px){#rotate-hint{display:flex;position:fixed;inset:0;z-index:50;flex-direction:column;align-items:center;justify-content:center;gap:18px;background:#080c18eb;color:#fff;font-family:system-ui,Noto Sans TC,sans-serif;font-size:20px;text-align:center;padding:24px}#rotate-hint .rotate-icon{font-size:64px;animation:rotate-tilt 1.6s ease-in-out infinite}}@keyframes rotate-tilt{0%,to{transform:rotate(0)}50%{transform:rotate(90deg)}}