/* First card */
    .row>div:nth-child(1) .card-service-7:hover {
        background-image: url(../images/sanishsoft/app_develop/1.jpg) ;
    }

    /* Second card */
    .row>div:nth-child(2) .card-service-7:hover {
        background-image: url(../images/sanishsoft/app_develop/2.jpg) ;
    }

    /* Third card */
    .row>div:nth-child(3) .card-service-7:hover {
        background-image: url(../images/sanishsoft/app_develop/3.jpg) ;
    }

    /* Fourth card */
    .row>div:nth-child(4) .card-service-7:hover {
        background-image: url(../images/sanishsoft/app_develop/4.jpg) ;
    }