diff --git a/quartz/styles/custom.scss b/quartz/styles/custom.scss
index b0c09dcb9..e2a576e6d 100644
--- a/quartz/styles/custom.scss
+++ b/quartz/styles/custom.scss
@@ -1,3 +1,7 @@
 @use "./base.scss";
 
-// put your custom CSS here!
+// put your custom CSS here!  
+body {
+  font-family: system-ui, -apple-system, Helvetica, Roboto, Tahoma, Arial, 'PingFang SC',  
+    'Noto Sans', 'Microsoft YaHei', sans-serif;
+}