html,
body,
canvas {
  margin: 0;
  padding: 0;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: absolute;
  top: 0;
  left: 0;
}
html {background-color:transparent;
  
}
body {
  background: url("http://www.ske520.com/2024/lanse/hudie/img/hudie.png") 50%;
  background-size: 30%;
  background-repeat: no-repeat;
}
div {
  z-index: 100;
}
div:last-child {
  top: 48px !important;
}
canvas {
  z-index: 10;
}