SOURCE

<div class="nir">
    [content]
</div>
啊啊

.nir {
/* height of replacement image */
   height: 100px; 
/* width of replacement image */
   width: 400px; 
   padding: 0;
   margin: 0;
   overflow: hidden;
}

.nir:before {
   content:url(https://z3.ax1x.com/2021/09/24/407zfs.md.jpg);
   display: inline-block;
   font-size: 0;
   line-height: 0;
}