/**
 * 自托管 Google Fonts（Fira Code + IBM Plex Sans + Plus Jakarta Sans）
 *
 * 原 layout.tsx 通过 fonts.googleapis.com 外链加载，存在两个问题：
 * 1. 跨源样式表使 html-to-image（复制消息为图片）读取 sheet.cssRules 时
 *    抛 SecurityError（Cannot access rules），控制台刷红色报错；
 * 2. 离线环境下安装版 Electron 字体静默回退。
 * 2026-10-07 改为自托管：woff2 在 public/fonts/，@font-face 照抄
 * Google css2 返回内容（含 unicode-range，浏览器按需加载子集）。
 * 2026-10-12（C9）补自托管 Plus Jakarta Sans（body 主字体，原经
 * globals.css 的 @import fonts.googleapis.com 跨源加载，是
 * cssRules SecurityError 的最后残留源），并删除该 @import。
 *
 * 采用可变字体（variable font）：每个子集只存一个 woff2 文件（含 300-700 轴），
 * 声明 font-weight: 300 700 即可。文件数从 12 个降到 4 个，体积减半。
 */
@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/fira-code-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Fira Code';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/fira-code-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/ibm-plex-sans-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'IBM Plex Sans';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/ibm-plex-sans-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/plus-jakarta-sans-latin-ext.woff2') format('woff2');
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: 'Plus Jakarta Sans';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('/fonts/plus-jakarta-sans-latin.woff2') format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}