.slider-about .fon-img{
height: 500px;
}
.slider-about .block-abaut{

}
.slider-about .slick-prev {
    left: 20px;
}
.slider-about .slick-next {
    right: 20px;
}
@media  (max-width: 575px)  {
.slider-about .fon-img{
height:auto;
}
}