.sbl-sym li { height: 250px;}
.sbl-sym li:last-child { width: 49% !important;}
@media all and (max-width: 1200px) {
    .sbl-sym li:last-child { width: 100%  !important;}
}

@media all and (max-width: 768px) {
     .sbl-sym li { height: auto;}   
}