@media(max-width:830px){
    .gellary_home_sudipta .child .child_sub1{
        height: 300px;
    }
    .gellary_home_sudipta .child .child_sub .section{
        height: 300px;
    }

    .gellary_home_sudipta .child .child_sub .section1{
        height: 300px;
    }
}