diff --git a/components/checkbox/demo/check-all.md b/components/checkbox/demo/check-all.md
index 3db79ce40c..e8f6092d42 100644
--- a/components/checkbox/demo/check-all.md
+++ b/components/checkbox/demo/check-all.md
@@ -75,3 +75,9 @@ ReactDOM.render(<App />, mountNode);
   border-bottom: 1px solid #e9e9e9;
 }
 ```
+
+<style>
+[data-theme="dark"] .site-checkbox-all-wrapper {
+  border-bottom: 1px solid #303030;
+}
+</style>
diff --git a/components/checkbox/index.en-US.md b/components/checkbox/index.en-US.md
index fe45470efe..8b40e2553a 100644
--- a/components/checkbox/index.en-US.md
+++ b/components/checkbox/index.en-US.md
@@ -45,9 +45,3 @@ Checkbox component.
 | ------- | ------------ | ------- |
 | blur()  | remove focus |         |
 | focus() | get focus    |         |
-
-<style>
-.site-checkbox-all-wrapper {
-  border-bottom: 1px solid #303030;
-}
-</style>
diff --git a/components/checkbox/index.zh-CN.md b/components/checkbox/index.zh-CN.md
index 3266d55c70..09ca987432 100644
--- a/components/checkbox/index.zh-CN.md
+++ b/components/checkbox/index.zh-CN.md
@@ -56,9 +56,3 @@ interface Option {
 | ------- | -------- | ---- |
 | blur()  | 移除焦点 |      |
 | focus() | 获取焦点 |      |
-
-<style>
-.site-checkbox-all-wrapper {
-  border-bottom: 1px solid #303030;
-}
-</style>