diff --git a/packages/fineui/src/less/base/single/button/button.less b/packages/fineui/src/less/base/single/button/button.less
index d404edd24..ddfdf2b22 100644
--- a/packages/fineui/src/less/base/single/button/button.less
+++ b/packages/fineui/src/less/base/single/button/button.less
@@ -479,7 +479,7 @@ body .bi-button, #body .bi-button {
   }
 }
 
-.bi-theme-dark {
+#body .bi-theme-dark {
   .bi-button, #body .bi-button {
     &.button-ignore {
       background-color: @color-bi-background-ignore-button-theme-dark;