/* Smartphones (portrait and landscape) ----------- */
@media only screen and (min-device-width : 320px) and (max-device-width : 767px) {

}
@media (max-width: 768px){
    .silder-ctrl-prev,
    .silder-ctrl-next{
        width: 10%;
        font-size: 26px;
        margin-top: -25px;
    }
    .silder-ctrl-con{
        width: 14px;
        height: 14px;
        padding: 0;
        margin: 0 5px;
    }
    .silder-ctrl-con>span{
        display: block;
        width: 100%;
        height: 100%;
        border-radius: 50%;
        padding: 0;
    }
}