.aim {
  position: relative;
  overflow: hidden;
  margin: 0;
  clear: both;
  padding: 0;
  height:100%;
}

.aim a {
  background-position: 0 center;
  background-size:cover;
  cursor: pointer;
  display: block;
  overflow: hidden;
  position: relative;
  float: left;
  text-decoration: none;
  height:100%;
}
.aim a img
{
    height:100%;
}
.aim a:hover,
.aim a:visited { text-decoration: none }

.aim ul { list-style: none }

.aim li {
  display: block;
  overflow: hidden;
  float: left;
}

.aim a span {
  color: #FFFFFF;
  bottom: -100px;
  left: 10px;
  width: 100%;
  display: block;
  padding: 2px 5px 5px;
  position: absolute;
  background: #000;
  font-size: 12px;
  font-weight: bold;
  height: 15px;
  line-height: 18px
}