@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 300;
  src: local('Source Sans Pro Light'), local('SourceSansPro-Light'), url(font1.woff) format('woff');
}
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 400;
  src: local('Source Sans Pro'), local('SourceSansPro-Regular'), url(font2.woff) format('woff');
}
@font-face {
  font-family: 'Source Sans Pro';
  font-style: normal;
  font-weight: 600;
  src: local('Source Sans Pro Semibold'), local('SourceSansPro-Semibold'), url(font3.woff) format('woff');
}