💄 fix Radio Group style with Badge

close #21213

components/radio/demo/badge.md

@@ -0,0 +1,34 @@
+---
+order: 99
+debug: true
+title:
+  zh-CN: Badge style
+  en-US: 测试 Badge 的样式
+---
+
+## zh-CN
+
+测试 Badge 的样式。
+
+## en-US
+
+Test Badge style.
+
+```jsx
+import { Radio, Badge } from 'antd';
+
+ReactDOM.render(
+  <Radio.Group buttonStyle="solid">
+    <Badge count={1}>
+      <Radio.Button value={1}>
+        Click Me
+      </Radio.Button>
+    </Badge>
+    <Badge count={2}>
+      <Radio.Button value={2}>
+        Not Me
+      </Radio.Button>
+    </Badge>
+  </Radio.Group>
+, mountNode);
+```

components/radio/style/index.less

@@ -16,6 +16,14 @@
   &-rtl {
     direction: rtl;
   }
+
+  .@{ant-prefix}-badge-count {
+    z-index: 1;
+  }
+
+  > .@{ant-prefix}-badge:not(:first-child) > .@{radio-prefix-cls}-button-wrapper {
+    border-left: none;
+  }
 }
 
 // 一般状态
@@ -209,6 +217,7 @@ span.@{radio-prefix-cls} + * {
       content: '';
     }
   }
+
   &:first-child {
     border-left: @border-width-base @border-style-base @border-color-base;
     border-radius: @border-radius-base 0 0 @border-radius-base;