I don't think it's only slightly modified, it really seems like a different font
You should already have this one on your computer.
Nope, it's a commercial font, so if you want to use it, you'll have to buy it
Otherwise, check here for free alternates :
Yes, vague, sorry. You made a "page" : html ? Word document ? Maybe something else ?
Best advice is from Menhir, use images, like screenshots. No embedding issues then.
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