Hi lawyerlinguist
Actually since they are 2 JA ACM Modules features-intro, they use 2 different styles, style-1 and style-3 , what you are asking would be possible to do only modifying code inside these files:
/templates/ja_lawfirm/acm/features-intro/tmpl/ style-1.php and style-1.xml
You can understand that this will require code customization that is out of the scope of this forum , but you can accomplish that looking at this 2 files
/templates/ja_lawfirm/acm/features-intro/tmpl/ style-3.php and style-3.xml
and trying to replicate it in the features-intro -style-1 module .
In my opinion you can easily do it making the font-awesome icon as a png image and loading it in style-1 module
Regards