diff --git a/docs/guide/theme/custom.css b/docs/guide/theme/custom.css
index b9a29137..2c6caa91 100644
--- a/docs/guide/theme/custom.css
+++ b/docs/guide/theme/custom.css
@@ -47,7 +47,7 @@ code, pre, .hljs {
 }
 
 .content main {
-    max-width: 90%;
+    max-width: 75%;
     line-height: 1.75;
 }