.erjinav{margin-bottom: 3%;text-align: center;}
@media (max-width: 576px) {
.er a {

    width: 131px;
    display: inline-block;}
       .er{ padding: 10px 6px;}
    .erjinav{margin-bottom: 5%;}
}
    .er:hover{
        background: #054f8c;}
.er:hover  a{
        color: #fff;}