@font-face {
  font-family: 'Source Sans Pro';
  font-style: italic;
  font-weight: 400;
  font-display: fallback;
  src: url(1.woff) format('woff');
}
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 300;
  font-display: fallback;
  src: url(2.woff) format('woff');
}
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 400;
  font-display: fallback;
  src: url(3.woff) format('woff');
}
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 700;
  font-display: fallback;
  src: url(4.woff) format('woff');
}