.zz:hover:before {
    display: block;
    content: "";
    height: 30px;
    width: 4px;
    background: none !important;
    position: absolute;
    left: 0;
    top: 50%;
    margin-top: -15px;}
.about-txt img{
    display: block;
    margin: 0 auto;
    width:600px ;
    height:auto !important;}
@media (max-width: 400px){
.about-txt img{
    width:100% !important;}
}