select 下拉框 选项和框分离 是缺少了什么样式吗

[Leiloloaa]

Bug Report or Feature Request (mark with an x)

[ ] Bug report -> please search issues before submitting
[ ] Feature request
[ ] Documentation issue or request

Current behavior

Expected behavior

Environment

Angular version: X.Y.Z

ngx-weui version: X.Y.Z

Browser:
- [ ] Chrome (desktop) version XX
- [ ] Firefox version XX
- [ ] Safari (desktop) version XX
- [ ] IE version XX

Others:

[cipchk]

@Leiloloaa 麻烦提供一个重现示例。