/** clients-section **/
.clients-section {
    position: relative;
    padding-bottom: 100px;
}

.clients-section .top-title {
    margin-bottom: 87px;
}

.clients-section .image-box img {
    display: block;
    max-width: 100%;
    width: auto;
    margin: 0 auto;
    -webkit-transition: all 300ms ease;
    -moz-transition: all 300ms ease;
    -ms-transition: all 300ms ease;
    -o-transition: all 300ms ease;
    transition: all 300ms ease;
}

.clients-section .image-box:hover img {
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
}