/* 思源宋体子集（OFL，tools/build.py 生成）+ Instrument Serif（OFL） */
@font-face { font-family: Song; src: url(song-r.woff2) format('woff2'); font-weight: 400; font-display: block; }
@font-face { font-family: Song; src: url(song-b.woff2) format('woff2'); font-weight: 700; font-display: block; }
@font-face { font-family: Instrument; src: url(instrument.woff2) format('woff2'); font-display: swap; }
@font-face { font-family: Instrument; src: url(instrument-i.woff2) format('woff2'); font-style: italic; font-display: swap; }