Template:Styles/add logoWikipedia1.css

/* Logos - WP on top, WMF horizontal below */
#p-logo a {
    background: top 30% center url(https://donate.wikimedia.org/static/images/mobile/copyright/wikipedia-wordmark-en.svg), top 70% center url(https://upload.wikimedia.org/wikipedia/donate/6/60/Wmf_logo_horiz_K.svg);
    background-repeat: no-repeat;
    background-size: 160px auto;
    margin-left: 8px;
}

@media screen and (max-width: 981px) {
    #content {
        padding-top: 140px;
    }
    #mw-panel, #p-logo, #p-logo a {
        width: 100%;
        height: 160px;
    }
    #p-logo a {
        margin-left: 0;
    }
}