.one{
  width:100%;
  height:800px;
  position: relative;
  overflow: hidden;
}
.one_img{
  position: absolute;
  top:50%;
  left: 50%;
  transform: translate(-50%,-50%);
}
.two{
  width:100%;
  height:1050px;
  position: relative;
  overflow: hidden;
}
.two_img{
  position: absolute;
  top:50%;
  left: 50%;
  transform: translate(-50%,-50%);
}