pcucheval

Thank you very much @skalanter ! You save me.

I improved the responsive layout like this :

@media only screen and (min-width : 860px){
.single-post .tnp-subscription{
  max-width:860px;
  margin-left: auto;
  margin-right: auto;
}
}
@media only screen and (max-width : 859px){
.single-post .tnp-subscription{
  margin-left: 20px;
  margin-right: 20px;
}
}

Best regards