The CSS for the Roboto font doesn't include a reference to the google web font, so the iPad can't reference the font.
I suspect you need to do something more in designer - I don't have the latest version to advise you further.
.Thin_Head1 {font-family:'Roboto';font-weight:250;font-size:60px;color:#0463A0;letter-spacing:-0.0em;}
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