.canvas {
  width: 750rpx;
  height: 750rpx;
}
.canvas.pro {
  position: absolute;
  bottom: 0;
  left: 0;
  transform: translate3d(-9999rpx, 0, 0);
}
.canvas.debug {
  position: absolute;
  bottom: 0;
  left: 0;
  border: 1rpx solid #ccc;
}