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frontend/node_modules/antd/es/cascader/style/panel.js

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+import { unit } from '@ant-design/cssinjs';
+import { prepareComponentToken } from '.';
+import { genComponentStyleHook } from '../../theme/internal';
+import getColumnsStyle from './columns';
+// ============================== Panel ===============================
+const genPanelStyle = token => {
+  const {
+    componentCls
+  } = token;
+  return {
+    [`${componentCls}-panel`]: [getColumnsStyle(token), {
+      display: 'inline-flex',
+      border: `${unit(token.lineWidth)} ${token.lineType} ${token.colorSplit}`,
+      borderRadius: token.borderRadiusLG,
+      overflowX: 'auto',
+      maxWidth: '100%',
+      [`${componentCls}-menus`]: {
+        alignItems: 'stretch'
+      },
+      [`${componentCls}-menu`]: {
+        height: 'auto'
+      },
+      '&-empty': {
+        padding: token.paddingXXS
+      }
+    }]
+  };
+};
+// ============================== Export ==============================
+export default genComponentStyleHook(['Cascader', 'Panel'], genPanelStyle, prepareComponentToken);