Custom Font only for an quotation marks + How to add a color to an underline text

Site URL: https://plums-lanternfish-zk73.squarespace.com/

password is: plums

I've used both the Headline and Paragraphs to have the multiple sized of Furtura PT in the site.

I have not found a css code that will allow me to only change the quotation marks to be Clarendon. I want to match what I did in the previous - version of my client's website -  designed in 2016 using Adobe Muse: crimsonps.com.

The first place I've used this large quotation mark is on the landing page.

I also am trying to find CSS code to create a red under line of some text on the Services page
 

thanks

Hi. Which text/quote mark are you referring to?