body {
  cursor: default;
  padding: 0;
  border: 0;
  margin: 0;

  text-align: center;
  background-color: white;
  font-family: Helvetica, Verdana, Arial, sans-serif;
  overflow: hidden;

}

body, canvas, div {
  outline: none;
  -moz-user-select: none;
  -webkit-user-select: none;
  -ms-user-select: none;
  -khtml-user-select: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

/* Remove spin of input type number */
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    /* display: none; <- Crashes Chrome on hover */
  -webkit-appearance: none;
  margin: 0; /* <-- Apparently some margin are still there even though it's hidden */
}

canvas {
  margin: 0 auto;
  background-color: rgba(0, 0, 0, 0);
}

#GameDiv {
  margin: 0 auto;
  border:medium none black;
}



:root {
  --safe-top: env(safe-area-inset-top);
  --safe-right: env(safe-area-inset-right);
  --safe-bottom: env(safe-area-inset-bottom);
  --safe-left: env(safe-area-inset-left);
}

.full-screen-sliced {
  width: 100%;
  height: 100%;
  border-width: 200px; /* 四个角的大小 */
  border-style: solid; /* 必须设置为solid才能使用border-image */
  border-image: url('bg.png') 350 fill; /* 使用图片进行边框切割 */
  box-sizing: border-box; /* 包含边框计算 */
}