@ant-design/cssinjs-utils provides utility functions specifically designed for managing and manipulating CSS-in-JS styles within the Ant Design ecosystem. It offers tools to handle style merging, prefixing, and other common CSS-in-JS tasks, streamlining the development process when working with Ant Design's theming and styling systems. This package is valuable for developers needing precise control over CSS-in-JS behavior within their Ant Design projects, ensuring consistent and maintainable styles.