SOURCE

<div class="p">
  <div class="obj  box-shadow-5" ></div>
</div>

.p{
  position: relative;
       width: 100px;
                height: 110px;
  background:white;
  overflow:hidden
    }  

.box-shadow-5{
              display: block;  //必须写
                content: "";     //必须写
  z-index:1;
                width: 10px;
                height: 110px;
                position: absolute;
                top:0;
                right: -10px;
                border-radius: 4px/40px;
                box-shadow: -2px 0 10px rgba(0,0,0,0.3);
}