I put this code in my obsidian publish

publish.css

/* section : font */
@font-face {
  font-family: "Geist";
  src: url(https://cdn.jsdelivr.net/gh/HananoshikaYomaru/geist@main/GeistVF.woff2)
    format("woff");
  font-weight: normal;
}

@font-face {
  font-family: "IA Writer Quattro";
  src: url(https://cdn.jsdelivr.net/gh/iaolo/iA-Fonts@master/iA%20Writer%20Mono/Webfonts/iAWriterMonoS-Regular.woff2)
    format("woff");
  font-weight: normal;
}

@font-face {
  font-family: "IA Writer Quattro";
  src: url(https://cdn.jsdelivr.net/gh/iaolo/iA-Fonts@master/iA%20Writer%20Mono/Webfonts/iAWriterMonoS-Bold.woff)
    format("woff");
  font-weight: bold;
}

@font-face {
  font-family: "Monaspace Radon Var";
  src: url(https://cdn.jsdelivr.net/gh/githubnext/monaspace@main/fonts/webfonts/MonaspaceRadonVarVF%5Bwght%2Cwdth%2Cslnt%5D.woff2)
    format("woff");
  font-weight: normal;
}

body {
  --font-text: "IA Writer Quattro", "Geist", sans-serif;
  --font-interface: "IA Writer Quattro", "Geist", sans-serif;
  --font-monospace: "IA Writer Quattro", "Geist";
}

body blockquote * {
  font-family: "Monaspace Radon Var", "IA Writer Quattro", "Geist", sans-serif;
}