.resim {position: relative;width: 494px;height: 184px;}
.resim > span.altBilgi {position: absolute;width: 494px;height: 30px;left: 0;bottom: 0;background: rgba(0,0,0,.5);color: #fff;display: block;text-align: center;line-height: 30px;font-size: 20px;text-transform: uppercase;display: block;}
.resim:hover span.altBilgi {background:rgba(255,0,0,.5);color:#fff;}