.clients-section {
    padding: 40px 0 60px;
}

.clients {
    list-style: none;
    margin: 0;
    padding: 0;
    text-align: center;
}

.clients-border>li {
    position: relative;
}

.clients li {
    height: 100px;
    margin: 0 41px;
    width: 100px;
    display: inline-block;
    cursor: pointer;
}

.clients>li img {

    position: relative;
    z-index: 1;
    margin: 0 auto;
    top: 50%;
    -webkit-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
}

.clients>li:hover img {
    /* filter: none; */
    filter: gray;
    -webkit-filter: grayscale(1);
    filter: grayscale(1);
    transform: translateY(-70px);
}

.clients li img {
    max-width: 90%;
    -webkit-transition: all .35s ease-in-out;
    -o-transition: .35s all ease-in-out;
    transition: all .35s ease-in-out;
}

.clients-border>li:after {
    position: absolute;
    content: "";
    height: 100%;
    width: 100%;
    border: 1px solid #eee;
    left: 0;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
    background: #fff;
    top: 0;
}