div#contenido ul{list-style-type:none;margin:0;}
div#contenido ul li{float:left;width:290px;height:280px;}

li#energias,li#sector_industrial{margin-left:50px;}
div#contenido ul li h2{margin:0;}
div#contenido ul li a{display:block;color:#666;background-repeat:no-repeat;background-position:top right;text-decoration:none;padding:100px 110px 0 0;}
div#contenido ul li a:hover{color:#008;text-decoration:underline;}
div#contenido ul li a span{display:block;color:#008;text-decoration:underline;margin-top:5px;}

li#climatizacion a{background-image:url('../media/inicio/climatizacion.jpg');}
li#energias a{background-image:url('../media/inicio/energias.jpg');}
li#obra_nueva a{background-image:url('../media/inicio/obra_nueva.jpg');}
li#sector_industrial a{background-image:url('../media/inicio/sector_industrial.jpg');}