Note that there is a symbol which looks like "$" in the first screenshot, it might be a transformation of "s", and the content is made up of hyperlinks in the second screenshot. I like this kind of font especially, appreciate if you could help me.
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pdffontsutility or your pdf viewer can show you the exact fonts used, no need to make us guess from an image – David Carlisle Jan 27 '22 at 13:42$sign. Regarding the general fonts question, the other comments address that. – barbara beeton Jan 27 '22 at 14:15\usepackage[linktoc=section,colorlinks=true]{hyperref}(should work regardless of the document class). Note that, in general,hyperrefhas to be the last package that you load in the preamble. – marquinho Jan 27 '22 at 15:16