.ws-logo-block {
    margin: 0 auto 20px;
    flex-wrap: wrap;
}
.ws-logo-block > * {
    text-align: center;
    padding:0 5px 15px;
}
.ws-logo-block a {
    display:block;
    transition: transform .5s
}
.ws-logo-block a:hover {
    /* filter:grayscale(1); */
    transform: scale(1.1);
}
@media only screen and (max-width: 574px) {
    .ws-logo-block div, .ws-logo-block a {
        width: 100%;
    }
}

@media only screen and (min-width: 575px) and (max-width: 767px) {
    .ws-logo-block div, .ws-logo-block a {
        width: 50%;
    }
}
@media only screen and (min-width: 768px) and (max-width: 1199px) {
    .ws-logo-block div, .ws-logo-block a {
        width: 33.333%;
    }
}
@media only screen and (min-width: 1200px) {
    .ws-logo-block div, .ws-logo-block a {
        width: 25%;
    }
}