.yuanjiao {

  border-radius: 15px;

  background: #000;

  padding: 20px; 

}


.yuanjiao2 {
 border-radius: 15px;
  background: #000;
  padding: 1px; 
 display: table-cell;
 vertical-align:middle;
 border: 1px solid #eee;
}
.yuanjiao2 img {
 vertical-align:middle;
 padding: 1px; 
}