#galeria_cabecera {
    clear: none;
    float: none;
    /*height: 550px;*/
    height: auto;
    left: 0;
    margin: 2% auto 0;
    position: relative;
    top: 0;
    width: 100%;

}


.item_galeria_portada {
    width:100%;
    /*height:550px;*/
    height: auto;
}

.descricpion_ventura {
    position:absolute;
    top:610px;
    background-color:#1C1C1C;
    height:25%;
    opacity:0.7;
    width:1220px;
}