.owl_img_class{
            max-width: 100%; 
            height: auto;
        }
        
        @media only screen and (min-width: 768px) {
            .margintop {
                margin-top: 10px;
            }
        }
        
         @media only screen and (max-width: 600px) {
            .margintop {
                margin-top: 2px;
            }
        }