<div class="d1 shadow-blur"></div>
<style>
*{
margin: 0;
padding: 0;
}
.d1{
width: 500px;
height: 200px;
margin:50px;
background-image: url(https://image.weilanwl.com/color2.0/plugin/sylb2244.jpg)
}
.shadow-blur {
position: relative;
}
.shadow-blur::before {
content: "";
display: block;
background: inherit;
filter: blur(10px);
position: absolute;
width: 100%;
height: 100%;
top: 10px;
left: 10px;
z-index: -1;
opacity: 0.4;
transform-origin: 0 0;
border-radius: inherit;
transform: scale(1, 1);
}
</style>