The same newsletter is looking differently at smartphones and desktops. The mobile shows font styles as you see when you edit it at the dashboard, but Outlook only displays the text in Times New Roman.
Sorry for the delay, but I was not notified of your answer.
I was using the Theme-1. But since then I’ve learned to customize the themes and I changed Theme-1 to a new one where I forced the font-family definition.
The excerpt row is now like this: