title: How to get the browser's default font family in CSS?
body: <p>I'm new to CSS and maybe this question is trivial, but I have googled a little and I didn't find what I'm looking for.</p>
  
  <p>I have declared a font-family for all my site. Now, I want to override the font family for some sections. I need the <strong>browser's default font family</strong>. How can I specify the browser's default font family in a css?</p>
  
  <pre><code>.browser-defatults {
     font-family: ?????
  }
  </code></pre>
  
  <p>Maybe I need to ignore all styles, how could I do this?</p>