{"message":"考公知识小程序后端服务运行中","version":"1.0.0","endpoints":{"GET /api/regions":"获取所有地区","GET /api/categories":"获取所有分类","GET /api/knowledge":"获取知识点列表（支持 region/category/keyword/page/pageSize 参数）","GET /api/knowledge/:id":"获取单个知识点详情","GET /api/knowledge/:id/related":"获取相关知识点","GET /api/search?keyword=xxx":"搜索知识点"}}