ul.catalogos li{
    float: left;    
    list-style: none;
    }

ul.catalogos li strong{
    display: block;
    float: left;
    font-size: 32px;
    font-weight: bold;
    }
    
ul.catalogos li a{
    background: #fff url(../images/bkg_pdf_catalogo.gif) no-repeat 36px 30px;
    display: block;
    width: 120px;
    height: 80px;
    color: #90b633;
    font-size: 12px;
    margin: 25px 50px 80px 20px;
    text-align: center;
    }