Web Design | Design Guidelines

Fiori Design

https://experience.sap.com/fiori-design-web/

Lightning Design System

https://www.lightningdesignsystem.com/getting-started/

Atlassin Design

https://atlassian.design/

The Harmony Design System

http://harmony.intuit.com/

Carbon Design System

http://carbondesignsystem.com/

Ant Design

https://ant.design/index-cn / https://pro.ant.design/index-cn / https://mobile.ant.design/index-cn / https://antv.alipay.com/zh-cn/index.html

Element

http://element.eleme.io/#/zh-CN

iView

https://www.iviewui.com/docs/guide/introduce

Bulma

https://bulma.io/

Vue - Blue

https://chenz24.github.io/vue-blu/#/

UIkit

https://getuikit.com/docs/introduction / http://getuikit.net/docs/core.html

Website Style Guide Resources

http://styleguides.io/examples.html

Web Themes & Templates (Envato Market)

https://themeforest.net/category/site-templates/admin-templates