因为这些类名不是"element-plus"内部的,是针对这个页面写的
"ep-bg-purple"在"https://github.com/element-plus/element-plus/blob/dev/docs/examples/layout/index.scss" (https://link.segmentfault.com/?enc=MgQM4L4heVBUnXQAuiFxQg%3D%3D.ZjNgY%2BLctwqKoRqGZRYnuIZmOlUOkHewIiyLMtb8v32Ib9KKXENyuY4gS7htXHkmTICwVajjAA7aWTpmwQ2S%2BGrYHcCFvLeBEOZ0FyF61LrrMAExApeONy5CaG9vxFl4)
"grid-content"就在源码里"image.png" (https://wmlx-new-image.oss-cn-shanghai.aliyuncs.com/images/20241110/439adebcb47ff85568eabecef991a96c.png)