@media screen and (min-width: 35em) {
    .ch_summ35 {
        padding-left: 0;
        text-indent: 0;
        text-align: center
        }
    }
@media screen and (min-width: 30em) {
    .ch_summ30 {
        padding-left: 0;
        text-indent: 0;
        text-align: center
        }
    }
@media screen and (min-width: 25em) {
    .ch_summ25 {
        padding-left: 0;
        text-indent: 0;
        text-align: center
        }
    }
@media screen and (min-width: 20em) {
    .ch_summ20 {
        padding-left: 0;
        text-indent: 0;
        text-align: center
        }
    }