.canvas-box {
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
  left: 0;
  // background-size: 100%;
  // background-position: center;
  // background-image: url("https://yun.duiba.com.cn/长城wey/选择车辆背景.jpg");
}
#canvas {
  width: 100%;
  height: 100%;
}
