Duolingo

收集了大量的优秀产品的设计体系、样式库，从优秀的体系化设计中获得灵感。

Learn how to design and develop apps using the Fluent Design System.

One Thought, One UI

Material Design is a visual language that synthesizes the classic principles of good design with the innovation of technology and science.

Resources, tooling, and design guidelines for building interfaces with GitHub’s design system.