I’ve been re check your site previously and it seems just works fine on my side. Please take a look the attached image url below.
image : https://www.dropbox.com/s/mhyhj8ad2djhbxt/Screenshot%202016-11-21%2012.48.40.png?dl=0
url page : http://www.codigoz.com.mx/site/conceptos/departamentos-piramides/
Let me know if you still getting problem in there.