.pkp_site_name {
    width: 100%;
}

.pkp_site_name .is_img {
    width: 100%;
}

.pkp_site_name .is_img img {
    display: block;
    width: 100%;
    max-width: 1920px;
    height: auto;
    min-height: 250px;
    margin: 0 auto;
}