style.css

@charset "utf-8";
/* CSS Document */

#best_clients {
    padding: 50px 12%;
    background-color: #f8f8f8
}

#best_clients .row_1 .client_container {
    width: 20%;
    display: inline-block;
    float: left
}

#best_clients .row_2 .client_container {
    width: 25%;
    display: inline-block;
    float: left
}

#best_clients .client_img_container {
    width: 100%;
    min-height: 100px;
    display: inline-block;
    position: relative
}

#best_clients .client_img_container img {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    max-width: 80%;
    margin: auto;
    -webkit-filter: grayscale(100%);
    filter: grayscale(100%);
    opacity: .4;
    max-height: 92px
}

#best_clients .client_container#cl_1 .client_img_container img,
#best_clients .client_container#cl_5 .client_img_container img {
    max-width: 72%!important;
    max-height: 84px!important;
}

#best_clients .client_container#cl_4 .client_img_container img {
    max-width: 60%!important;
    max-height: 70px!important
}

#best_clients .client_img_container img:hover {
    -webkit-filter: grayscale(0);
    filter: grayscale(0);
    opacity: 1
}

#best_clients .row_1 {
    padding: 25px 0
}

#best_clients .row_2 {
    padding: 25px 10%
}