I update for show my problem. I add a capture.
In case A, i put the code:
And i get correct format in desktop version and clipped logo in mobile version (in the url this is the actual situation).
In case B, as default, i have the code:
And i get correct format in mobile version and 2 lines for header in the desktop version.
Please, help me.
Thanks very much.
PD: The dimensions of logo are 300x45 px