fonts-example.css

@font-face {
  font-family: 'Helvetica Neue';
  src: url('HelveticaNeueLTPro-Lt.eot');
  src: url('HelveticaNeueLTPro-Lt.eot?#iefix') format('embedded-opentype'),
       local('Helvetica Neue'), url('HelveticaNeueLTPro-Lt.otf') format('opentype'),
       url('HelveticaNeueLTPro-Lt.ttf') format('truetype'),
       url('HelveticaNeueLTPro-Lt.woff') format('woff'),
       url('HelveticaNeueLTPro-Lt.woff2') format('woff2');
  font-weight: 100;
  font-style: normal;
}

@font-face {
  font-family: 'Helvetica Neue';
  src: url('HelveticaNeueLTPro-Roman.eot');
  src: url('HelveticaNeueLTPro-Roman.eot?#iefix') format('embedded-opentype'),
       local('Helvetica Neue'), url('HelveticaNeueLTPro-Roman.otf') format('opentype'),
       url('HelveticaNeueLTPro-Roman.ttf') format('truetype'),
       url('HelveticaNeueLTPro-Roman.woff') format('woff'),
       url('HelveticaNeueLTPro-Roman.woff2') format('woff2');
  font-weight: normal;
  font-style: normal;
}

@font-face {
  font-family: 'Helvetica Neue';
  src: url('HelveticaNeueLTPro-Md.eot');
  src: url('HelveticaNeueLTPro-Md.eot?#iefix') format('embedded-opentype'),
       local('Helvetica Neue'), url('HelveticaNeueLTPro-Md.otf') format('opentype'),
       url('HelveticaNeueLTPro-Md.ttf') format('truetype'),
       url('HelveticaNeueLTPro-Md.woff') format('woff'),
       url('HelveticaNeueLTPro-Md.woff2') format('woff2');
  font-weight: 500;
  font-style: normal;
}

@font-face {
  font-family: 'Helvetica Neue';
  src: url('HelveticaNeueLTPro-Bd.eot');
  src: url('HelveticaNeueLTPro-Bd.eot?#iefix') format('embedded-opentype'),
       local('Helvetica Neue'), url('HelveticaNeueLTPro-Bd.otf') format('opentype'),
       url('HelveticaNeueLTPro-Bd.ttf') format('truetype'),
       url('HelveticaNeueLTPro-Bd.woff') format('woff'),
       url('HelveticaNeueLTPro-Bd.woff2') format('woff2');
  font-weight: bold;
  font-style: normal;
}