#home{
width:60%;
margin-left:250px;
height:auto;
position:absolute;
z-index:4;
background:hsla(0,0%,100%,0.6);
box-shadow:0 0 10px 2px #000000;
}
#home::before {
content: '';
position: absolute;
width:100%;
height:100%;
background:url(https://img.zcool.cn/community/038b33f58997ceea801219c77518457.gif);
background-size:120%;
background-attachment: fixed;
z-index: -1;
-webkit-filter: blur(10px);
filter: blur(10px);
}