diff --git a/web/src/index.css b/web/src/index.css
index 359d33a3..7600f7cf 100644
--- a/web/src/index.css
+++ b/web/src/index.css
@@ -134,6 +134,7 @@ code {
   background: transparent;
 }
 
+.semi-chat-inputBox-sendButton,
 .semi-page-item,
 .semi-navigation-item,
 .semi-tag-closable,