@media screen and (max-width: 900px) {
    .c-stepper__item:before{
        padding-left: 12px;
        padding-top: 8px;
    }
    .c-stepper__item{
        margin-left: -12px;
    }
    .c-stepper__item:not(:last-child):after{
        left: 6px;
    }
}