代码放置于：设置-系统-自定义样式

body{font-family: "LXGW WenKai Screen", sans-serif !important;}

代码放置于：设置-系统-自定义脚本

function changeFont() { 
  const link = document.createElement("link");
  link.rel = "stylesheet";
  link.type = "text/css";
  link.href = "https://fastly.jsdelivr.net/npm/lxgw-wenkai-webfont@1.6.0/lxgwwenkai-light.css";
  document.head.append(link);
};
changeFont()