.list_images {

display: block;

clear: both;

height: auto;

width: 100%;

text-align: center;

margin: 0;

padding: 0;

margin-bottom: 20px;

}

.list_images li {

list-style: none;

float: left;

margin-right: 10px;

position: relative

}

.list_images li a {

position: absolute;

left: 20%;

top: 28%;

background: rgba(0, 0, 0, 0.58);

color: #fff;

padding: 4px;

display: none;

}

.list_images li:hover > a {display: block}