[DiapDealer]

How did you export it as PDF (and are you certain that process should result in the embedded fonts being included in said PDF)?

Change the Sigil Preview font to something that differs quite drastically from the font you're embedding. Then instead of applying the embedded font to the body element, assign it to certain classes of spans and/or divs. Then you should be able to easily see if your fonts are embedded properly.

And if you're truly using typographic quotes in your css--don't.

You also need to create an @fontface rule for EACH of the four font-files (adjusting the properties for font-weight, font-style and the src url accordingly). The font-family name needs to be identical for all four font font-files.

Then when you get it working, consider not using embedded fonts for the body text in your epub. There's many reasons it's a bad idea (besides the legal issues you'd run into for distributing the Georgia font with your epub).