.img_box{
    width: 40rem;
    margin: auto;
    margin-top: 3rem;
   
}
.img_box img{
    width: 100%;
    background: center;
}
@media screen and (max-width: 992px) {
    .img_box{
        width:100%;
        margin: auto;
        margin-top: 4rem;
       
    }
    .img_box img{
        width: 100%;
        background: center;
    }
}