An abstract is added to the homepage article list, and code highlighting allows custom color matching.

[rumosky]

As the title states, the home page article card has only one title. I personally prefer to add a summary content (this is not very important);
Can you give me some color schemes for code highlighting? I really like atom one dark, but I don’t know how to change it.

[CaiJimmy]

I personally prefer to add a summary content (this is not very important);

You need to modify the theme source file. It's not supported out of box.

Can you give me some color schemes for code highlighting?

See https://gohugo.io/functions/transform/highlight/#noclasses

Generate the CSS file and override it: https://github.com/CaiJimmy/hugo-theme-stack/tree/master/assets/scss/partials/highlight