diff --git a/src/templates/docsStyle.less b/src/templates/docsStyle.less
index c9ed791a7..c9ce0236e 100644
--- a/src/templates/docsStyle.less
+++ b/src/templates/docsStyle.less
@@ -78,6 +78,14 @@
     }
   }
 
+  sub {
+    vertical-align: sub;
+  }
+
+  sup {
+    vertical-align: sup;
+  }
+
   code {
     font-size: 14px;
     line-height: 1.4rem;