[SOLVED] issue in styling custom types

Hello

I use :
WP3.8
ata 3.7.13
url http://zombi-epanoui.com

When I add custom type (with whatever plugin, I tried others), the custom type don't keep the styling of post and page. A custom type as example : http://zombi-epanoui.com/dictionary/cercueil/. You will notice that the background disappear.
How can I keep the same styling in csutom types than in posts and pages.
Thanks in advance

Isabelle