.div_formulario{ width:470px; height:auto; display:block;  margin-left:30px; margin-right:30px;}
.div_formulario div{ float:none; margin-top:5px;}
.txt{ }
.campo{width:100%; }
.textarea{ width:100%; height:80px;}

/*txts*/
.campo, .textarea {font-family:Arial, Helvetica, sans-serif; color:#333; font-size:13px;}


/*btn*/
.div_formulario ul{ width:470px; height:auto; display:block; margin-top:20px;}
.div_formulario a{ width:80px; height:40px; display:block; background-image:url(images/botones/btn_enviar.jpg); float:right; margin-left:270px; margin-bottom:20px;}
.div_formulario a:hover{ background-position:bottom;}