@media (min-width: 769px) {
    .df{display: -webkit-flex;display: -moz-flex;display: -ms-flex;display: -o-flex;display: flex;}
    .jc-btw{justify-content: space-between;}
    .ai-center{-ms-align-items: center;align-items: center;}
}

@media (max-width: 768px) {
    .df > p + img{
        display: block;
        margin-top: 1em;
        margin-left: auto;
        margin-right: auto;
        height: auto;
    }
}