/*.certificate {*/
/*    background-color: #fff;*/
/*    border: 20px solid transparent;*/
/*    box-sizing: border-box;*/
/*    background-image: url('../images/tb.png'), url('../images/lr.png'), url('../images/tb.png'), url('../images/lr.png');*/
/*    background-repeat: no-repeat;*/
/*    background-position: top, right, bottom, left;*/
/*    background-size: 100% 20px, 20px 100%, 100% 20px, 20px 100%;*/
/*    padding: 20px;*/
/*    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);*/
/*}*/


.certificate img{
    width: 100%;
    padding: 20px;
}