Does anyone know why tag <a> font and size are different than all other tags in the same page?

I am using the browser's default font and removed all font-size, font-name and font-family from CSS files.
Can anyone help on my problem? Thanks in advance!  

I tried to not have the link tag, the font and font-size are same as others
<ul style="list-style-type:none" id="quickAccessList" >
  <li><a ui-sref="addaccount" class="fa fa-file"> Create An Account</a></li>
  <li><a ui-sref="editaccount" class="fa fa-server" > Modify An Account</a></li>
  <li><a ui-sref="deleteaccount" class="fa fa-database" > Delete An Accout </a></li>
</ul>

I searched all CSS files and did not find any font-name settings.