Nunito & Open Sans fonts are not working in inline css for email template

I have created email template using table tags with font (Nunito & Open Sans) from google import.

Here is my code...

<style>
@import url('https://fonts.googleapis.com/css?family=Nunito:200,300,400,600,700,800,900|Open+Sans:300,400,600,700,800&display=swap');
</style>

Using like this way...

<table>
   <tr>
      <td style="style="font-family: 'Nunito', sans-serif; font-size:25.84px; color:#000; text-align:center; font-weight:600;"">
         Welcome Text
      </td>
   </tr>
</table>

The above code is working in my local fine. but when I have sent email fonts are not applying.