/*iPhone Device Setting*/
@media only screen 
    and (min-device-width : 375px) 
    and (max-device-width : 812px) 
    and (-webkit-device-pixel-ratio : 3)
    and (orientation : landscape) { 
      
      html{
        font-size: 16px;
      }

}

/*PC Display*/
@media only screen 
    and (min-width : 820px) 
    and (max-width : 1000px) 
{ 
      
      html{
        font-size: 20px;
      }

}

@media only screen 
    and (min-width : 1000px) 
    and (max-width : 2000px) 
{ 
      
      html{
        font-size: 24px;
      }

}