@media screen and (max-width: 500px) {

    .contentCon li:nth-child(1){
        width: 290px;
        height: 145px;
        background-size: 100% 100%;
        top: 77px;
        left: 7%;
    }
    .contentCon li:nth-child(2) {
        left: 41%;
        top: 190px;
    }
    .contentCon li:nth-child(3) {
        left: 9%;
        top: 0px;
    }
    .contentCon li:nth-child(4) {
        left: 9%;
        top: 221px;
    }
    .contentCon li:nth-child(5) {
        left: 66%;
        top: 14px;
    }.contentCon li:nth-child(6) {
             left: 66%;
             top: 223px;
    }
    .contentCon li:nth-child(7) {
        left: 41%;
        top: 347px;
    }


}