.img-produto{
    overflow: hidden;

    display: block;
    position: relative;

}

.img-produto a{
    text-decoration: none;
    color: white;
}

.img-produto .preco {
    position:absolute;
    background:#000;
    color:#fff;
    -ms-filter: "progid:DXImageTransform.Microsoft.Alpha(Opacity=80)";  /*IE 8*/
    filter: progid:DXImageTransform.Microsoft.Alpha(Opacity=80);  /*IE 5-7*/
    -moz-opacity:0.8;  /*old mozilla */
    -khtml-opacity: 0.8;   /*old safari*/   
    opacity: 0.8;   /*modern browsers*/
    width:100%;
    height: 50px;  
    bottom: -50px;
    text-align: center;
    padding: 10px;
}