html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: #101014;
  overflow: hidden;
}

#wrap {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 800x600 固定分辨率，等比放大并保持像素风格 */
#game {
  width: min(100vw, calc(100vh * 4 / 3));
  height: auto;
  image-rendering: pixelated;
  image-rendering: crisp-edges;
  cursor: none;            /* 由游戏内绘制鼠标指针 */
  box-shadow: 0 0 40px rgba(0, 0, 0, 0.8);
}
body{color:#edf2f8;font-family:Arial,"PingFang SC","Microsoft YaHei",sans-serif}button{font:inherit;cursor:pointer;touch-action:none}.toolbar{position:fixed;top:max(10px,env(safe-area-inset-top));right:12px;display:flex;gap:8px;z-index:10}.toolbar button,#help-back{border:1px solid #ffffff3b;border-radius:7px;padding:10px 12px;background:#17232fee;color:#f5dc7f;font-size:12px;min-height:40px}#loading{position:fixed;inset:0;display:grid;place-items:center;background:#101014;z-index:30}#loading[hidden]{display:none}#help-panel{position:fixed;inset:65px max(18px,calc((100vw - 860px)/2)) 18px;z-index:20;overflow:auto;background:#14202cf5;border:1px solid #3c4f61;border-radius:12px;padding:25px 30px;box-sizing:border-box;overscroll-behavior:contain}#help-panel[hidden]{display:none}.help-head{display:flex;justify-content:space-between;align-items:center;gap:15px;position:sticky;top:-25px;padding:15px 0;background:#14202c;z-index:1}h1{font-size:26px;margin:0}h2{font-size:18px;color:#f5da72;margin:24px 0 10px}p{font-size:14px;line-height:1.85;color:#c4d2e0}kbd{display:inline-block;padding:4px 8px;background:#273b4f;border:1px solid #536578;border-radius:5px;color:white}.control-columns{display:grid;grid-template-columns:1fr 1fr;gap:20px}.powerups{display:grid;grid-template-columns:1fr 1fr;gap:9px}.powerups span{padding:10px 12px;background:#213347;border-radius:5px;font-size:13px}.touch-controls{display:none;position:fixed;bottom:max(12px,env(safe-area-inset-bottom));left:15px;right:15px;justify-content:space-between;align-items:center;pointer-events:none}.touch-controls button{pointer-events:auto;background:#18283dcc;border:1px solid #a8c4dc77;color:#fff;border-radius:10px;min-width:42px;height:42px;user-select:none;font-size:20px}.dpad{display:grid;grid-template-columns:repeat(3,42px);gap:4px}.dpad button:first-child{grid-column:2}.dpad button:nth-child(2){grid-row:2;grid-column:1}.dpad button:nth-child(3){grid-row:2;grid-column:2}.dpad button:nth-child(4){grid-row:2;grid-column:3}.touch-controls .fire{font-size:15px;width:64px;height:64px;border-radius:50%;background:#775f20dc}#game{touch-action:none}@media(pointer:coarse){.touch-controls{display:flex}}@media(max-width:600px){.toolbar{gap:5px;right:7px}.toolbar button{padding:8px;font-size:11px}#help-panel{inset:60px 8px 10px;padding:15px}.help-head{top:-15px;align-items:flex-start}h1{font-size:21px}.control-columns{grid-template-columns:1fr;gap:0}.powerups{grid-template-columns:1fr 1fr}.powerups span{font-size:12px}}@media(max-height:450px){#game{width:min(100vw,calc(100dvh * 4 / 3))}.toolbar{top:5px}.toolbar button{min-height:30px;padding:6px}.touch-controls{bottom:6px}.dpad{grid-template-columns:repeat(3,34px)}.touch-controls button{min-width:34px;height:34px}.touch-controls .fire{height:52px;width:52px}}

body:not([data-screen="GameScreen"]) .touch-controls{display:none}