@media (max-width: 767px) {
    .item_img{width:100%;display: block;text-align: center;}
    .item_img img{ max-width:350px; width:auto;max-height: 65vw;}

    .grbase-main, .admin .grbase-main {
            padding-top: 60px;
            padding-bottom: 60px;
            display: none;
    }
    .grbase-main p {
            width: 500px;
            margin: 0 auto;
    }
}