[Feature Request] Hope that the css section can be written with scss

### Existing Component
是

### Component Name
all components

### Description
Hope that the css part can be written with scss, it can help us easy to change the style according to the project needs.

Review how styles are organized across the repository's Vue components and how the project currently builds CSS. Define the migration scope for all components, including the expected customization workflow, and confirm that the complete component set supports SCSS before considering the request done.

Written by the indexing model from the issue text.