@font-face {
  font-family: "Noto Sans SC";
  src:
    local("Noto Sans SC"),
    local("Noto Sans SC Regular"),
    local("NotoSansSC-Regular"),
    local("Noto Sans CJK SC"),
    local("Noto Sans CJK SC Regular"),
    local("Noto Sans SC Variable"),
    local("Source Han Sans CN"),
    local("Source Han Sans CN Regular"),
    local("SourceHanSansCN-Regular"),
    local("Source Han Sans SC"),
    local("Source Han Sans SC Regular"),
    local("SourceHanSansSC-Regular"),
    local("Source Han Sans CN VF"),
    local("Source Han Sans SC VF"),
    url("/fonts/NotoSansSC-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans SC";
  src:
    local("Noto Sans SC Bold"),
    local("NotoSansSC-Bold"),
    local("Noto Sans CJK SC Bold"),
    local("Noto Sans SC Variable"),
    local("Source Han Sans CN Bold"),
    local("SourceHanSansCN-Bold"),
    local("Source Han Sans SC Bold"),
    local("SourceHanSansSC-Bold"),
    local("Source Han Sans CN VF"),
    local("Source Han Sans SC VF"),
    url("/fonts/NotoSansSC-Bold.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Cascadia Code";
  src:
    local("Cascadia Code"),
    local("CascadiaCode-Regular"),
    url("/fonts/CascadiaCode-Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Cascadia Code";
  src:
    local("Cascadia Code Bold"),
    local("CascadiaCode-Bold"),
    url("/fonts/CascadiaCode-Bold.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

:root {
  /* 优先使用系统原生 UI 字体，fallback 到 Noto Sans SC */
  --font-family:
    system-ui, -apple-system, BlinkMacSystemFont, Ubuntu, "PingFang SC",
    "Microsoft YaHei", "微软雅黑", "MiSans L3", "HarmonyOS Sans SC",
    "HONOR Sans CN", "MiSans", "OPPO Sans 4.0", "vivo Sans SC L3", "vivo Sans",
    "vivo Sans SC VF", "Noto Sans SC", sans-serif;

  /* 优先使用系统自带的等宽编程字体，fallback 触发 Cascadia Code */
  --font-family-mono: ui-monospace, "Cascadia Code", monospace;
}