@font-face { 
    font-family: 'intro'; 
    src: url(' ../fonts/intro.woff2') format('woff2'), 
         url(' ../fonts/intro.woff') format('woff'), 
         url(' ../fonts/intro.ttf') format('truetype'); 
    font-weight: normal; 
    font-style: normal; 
}

h1, h2, h3 { font-family: 'intro', Arial; }