I'm working on making my site look the same under Safari and Chrome. In Chrome it looks exactly how I want it to. The major problem is that Google Font doesn't seem to be loading under Safari. Because I'm using the exact code given on the Google Font site, I can't understand why Safari won't fetch it. Is it just incompatible with Safari and I have to rely on a fallback font?
Your CSS should not only contain
font-family: 'Source Sans Pro', sans-serif;
it should also have values for FONT-STYLE and FONT-WEIGHT:
font-family: 'Source Sans Pro', sans-serif; font-weight:900; font-style:italic;
in case you use a font that contains those values like for example: https://fonts.googleapis.com/css?family=Source+Sans+Pro:900italic