.group_show_partner {
    height: auto;
    margin: auto;
    margin-bottom: 20px;
}

.group_show_partner h2{
    font-family: arial;
    font-size: 20px;
    color: #4a4a4a;
    padding-top: 30px;
    padding-bottom: 20px;
}

.group_show_partner ul.listPartner {
    height: auto;
    position: relative;
}

.group_show_partner ul.listPartner li {
    float: left;
    width: 33%;
    border: 1px solid #dedede;
    margin-left: -1px;
    margin-top: -1px;
    position: relative;
}
.group_show_partner ul.listPartner li:after {
    content: '';
    display: block;
    padding-top: 100%;
}
.group_show_partner ul.listPartner li img {
    max-width: 100%;
    position: absolute;
    left: 50%;
    top: 50%;

    -webkit-transform:translate(-50%, -50%);
    -moz-transform:translate(-50%, -50%);
    -o-transform:translate(-50%, -50%);
    -ms-transform:translate(-50%, -50%);
    transform:translate(-50%, -50%);
}

.group_show_partner ul.listPartner li:hover .hover_partner{
    display: block;
}

.hover_partner {
    display: none;
    width: 100%;
    height: 100%;
    background: #2e99da;
    position: absolute;
    top: 0;
    overflow: hidden;
}

.hover_partner p {
    color: #ffffff;
    font-family: arial;
    font-size: 20px;
    text-align: center;
    line-height: normal;
    position: absolute;
    width: 100%;
    padding: 0 30px;
    left: 50%;
    top: 50%;

    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;

    -webkit-transform:translate(-50%, -50%);
    -moz-transform:translate(-50%, -50%);
    -o-transform:translate(-50%, -50%);
    -ms-transform:translate(-50%, -50%);
    transform:translate(-50%, -50%);
}

@media only screen and (max-device-width: 480px) {
    .group_show_partner ul.listPartner li {
        width: 50%;
    }
}