Question: how to configure cascading menu in nav?

[ichangyun]

I'd like to configure nav contains pop up menu, like this:

What I got now doesn't contains a menu in nav.

the mkdocs.yml:
`
site_name: 畅云时讯
site_url: http://www.ichangyun.cn

#strict: true

theme:
name: material
language: zh
logo: image/icon.ico
palette:
primary: light blue
features:
- navigation.indexes
- navigation.tabs
- navigation.instant
- navigation.tabs.sticky
markdown_extensions:

• pymdownx.emoji:
  emoji_index: !!python/name:materialx.emoji.twemoji
  emoji_generator: !!python/name:materialx.emoji.to_svg
• pymdownx.critic
• pymdownx.caret
• pymdownx.mark
• pymdownx.tilde
• pymdownx.tabbed
• attr_list
• pymdownx.arithmatex:
  generic: true
• pymdownx.highlight:
  linenums: true
• pymdownx.superfences
• pymdownx.details
• admonition
• toc:
  baselevel: 2
  permalink: true
  slugify: !!python/name:pymdownx.slugs.uslugify
• meta
  plugins:
• include-markdown
• search:
  lang: ja
• awesome-pages
  `

the top level .pages:

`
nav:

• 首页: index.md
• 产品中心: products
• 解决方案: solutions
• 联合实验室: lab
• 新闻动态: news
• 关于我们: about
  `

[lukasgeiter]

I'm not sure I understand your question. If you are asking about how you can get your navigation to look like the screenshot you're at the wrong address here. This plugin revolves purely around the structure of your navigation. How it is then rendered is a matter of the theme, in your case mkdocs-material.