fix: checkbox demo dark

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>

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>

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>