@font-face{
   font-family: 'SourceSansCN';
   font-weight: 250 900;
   font-style: normal;
   font-stretch: normal;
   font-display: swap;
   src: url('SourceHanSansCN/SourceHanSansCN-VF.otf.woff2') format('woff2'),
        url('SourceHanSansCN/SourceHanSansCN-VF.otf') format('opentype'),
        url('SourceHanSansCN/SourceHanSansCN-VF.ttf') format('truetype');
}