SOURCE

console 命令行工具 X clear

                    
>
console
<div class="box">
  <span></span>
</div>
*{
  margin:0;
  padding:0;
}
.box{
  width:100%;
  height:200px;
  background:#2a2e31;
  display:block;
  position:relative;
}
span{
  position:absolute;
  width:100%;
  bottom:0;
}
span:after {
    background-image: url('https://zurb.com/packs/zurb/img/curve-bg-576672200f6225a05f88cc5aabeee29f.svg');
    background-size: 100% 100%;
    content: "";
    display: block;
    height: 40px;
    position: absolute;
    top: -39px;
    width: 100%;
    z-index: 1;
}
}