Beginning
As the title of the rust document look long time eye blurred, adjusted a softer mdBook style.
Theoretically, it is suitable for all mdBook generated Rust documents.
Supported domain-prefix are listed below, if you want to add a domain, please reply below.
1. https://doc.rust-lang.org/
2. https://course.rs/
3. https://rustwiki.org/zh-CN/
4. https://huangjj27.github.io/async-book/
Pick up your own copy at the address below (for css code, please open the link to view) and use it with the rust theme. If you like, or if there are any modifications or customizations needed, please reply below. Perhaps later I will create a GitHub repository.
The effect is as shown 
