/* 沿石官网 Web 字体 — 2026-07-30 子集化版
   思源宋体/思源黑体/DM Sans 可变字体，按页面实际用字子集化（SIL OFL 免费商用，OFL-LICENSE.txt 同目录）
   覆盖 index.html + 404.html 全部用字；新增页面文字需重跑 tools/optimize_speed.py */
@font-face {
  font-family: 'Noto Serif SC Variable';
  src: url('./serif/files/serif-subset.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'Noto Sans SC Variable';
  src: url('./sans/files/sans-subset.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: 'DM Sans Variable';
  src: url('./latin/files/latin-subset.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}