* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  overflow: hidden;
  background: #05070d;
}
canvas {
  display: block;
}
.tip {
  position: fixed;
  left: 12px;
  top: 12px;
  color: rgba(255,255,255,0.55);
  font-size: 13px;
  letter-spacing: 1px;
  pointer-events: none;
  z-index: 10;
}
.loading{
  position: fixed;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  color: #ccccdd;
  font-size:22px;
  z-index:20;
  pointer-events:none;
}