div#centro {width:540px; text-align:left;}

.contenido {background: #fff; border:0; margin:1px 2px 0 2px; padding: 5px;}
.contenido a {color: #6f7d87; text-decoration: none;} 
.contenido a:hover {color: #047fc1;}

a.enlace {color:#6f7d87; text-decoration:none;}
a.enlace:hover {color:#6f7d87; text-decoration:underline;}