diff --git a/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/BookChapterController.java b/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/BookChapterController.java
index 0073fb3..a7fdf79 100644
--- a/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/BookChapterController.java
+++ b/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/BookChapterController.java
@@ -4,6 +4,8 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 import xyz.playedu.common.types.JsonResponse;
 import xyz.playedu.jc.domain.BookChapter;
+import xyz.playedu.jc.domain.dto.ChapterSortDTO;
+import xyz.playedu.jc.domain.vo.ChapterTreeVO;
 import xyz.playedu.jc.service.IBookChapterService;
 
 import java.util.List;
@@ -11,6 +13,8 @@ import java.util.Optional;
 
 /**
  * 教材章节 后台管理接口
+ * 对应需求文档：
+ * 1.1 章节管理：新增/编辑/删除/拖拽排序/三级目录树
  */
 @RestController
 @RequestMapping("/textbook/chapter")
@@ -19,42 +23,50 @@ public class BookChapterController {
     @Autowired
     private IBookChapterService bookChapterService;
 
-    /**
-     * 根据教材ID获取章节列表（平铺 + 已排序）
-     * 你可以在前端把它组装成树，也可以后面在后端加树形 VO。
-     */
+    /** 获取某教材的章节平铺列表 */
     @GetMapping("/list")
     public JsonResponse list(@RequestParam("bookId") Integer bookId) {
-        List<BookChapter> chapters = bookChapterService.getByBookId(bookId);
-        List<BookChapter> safeList = Optional.ofNullable(chapters).orElseGet(java.util.Collections::emptyList);
-        return JsonResponse.data(safeList);
+        List<BookChapter> chapters = bookChapterService.listByBookId(bookId);
+        return JsonResponse.data(chapters);
     }
 
-    /**
-     * 新增章节
-     */
+    /** 获取章节树（最多三级目录） */
+    @GetMapping("/tree")
+    public JsonResponse tree(@RequestParam("bookId") Integer bookId) {
+        List<ChapterTreeVO> tree = bookChapterService.treeByBookId(bookId);
+        return JsonResponse.data(tree);
+    }
+
+    /** 新增章节 */
     @PostMapping
     public JsonResponse create(@RequestBody BookChapter chapter) {
-        // 可在这里补充 creator / tenantId 等信息
+        // 默认 parentId 为 0
+        if (chapter.getParentId() == null) {
+            chapter.setParentId(0);
+        }
         bookChapterService.save(chapter);
         return JsonResponse.success();
     }
 
-    /**
-     * 修改章节
-     */
+    /** 修改章节 */
     @PutMapping
     public JsonResponse update(@RequestBody BookChapter chapter) {
         bookChapterService.updateById(chapter);
         return JsonResponse.success();
     }
 
-    /**
-     * 删除章节
-     */
+    /** 删除章节（可在 Service 里做子节点/内容校验） */
     @DeleteMapping("/{id}")
     public JsonResponse delete(@PathVariable("id") Integer id) {
-        bookChapterService.removeById(id);
+        bookChapterService.removeChapter(id);
+        return JsonResponse.success();
+    }
+
+    /** 拖拽排序 / 批量调整层级 */
+    @PostMapping("/sort")
+    public JsonResponse sort(@RequestParam("bookId") Integer bookId,
+                             @RequestBody List<ChapterSortDTO> sorts) {
+        bookChapterService.sort(bookId, sorts);
         return JsonResponse.success();
     }
 }
\ No newline at end of file
diff --git a/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/ChapterContentController.java b/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/ChapterContentController.java
index 1bbaec3..8316f3e 100644
--- a/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/ChapterContentController.java
+++ b/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/ChapterContentController.java
@@ -7,6 +7,8 @@ import xyz.playedu.jc.domain.ChapterContent;
 import xyz.playedu.jc.service.IChapterContentService;
 
 /**
+ *
+ * todo
  * 章节内容 后台接口
  */
 @RestController
diff --git a/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/JCResourceController.java b/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/JCResourceController.java
index 3aebafa..d45e41f 100644
--- a/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/JCResourceController.java
+++ b/app/api/playedu-api/src/main/java/xyz/playedu/api/controller/backend/jc/JCResourceController.java
@@ -1,9 +1,11 @@
 package xyz.playedu.api.controller.backend.jc;
 
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.*;
 import xyz.playedu.common.types.JsonResponse;
 import xyz.playedu.jc.domain.JCResource;
+import xyz.playedu.jc.domain.dto.ResourcePageRequestDTO;
 import xyz.playedu.jc.service.JCIResourceService;
 
 import java.util.List;
@@ -31,21 +33,33 @@ public class JCResourceController {
         return JsonResponse.data(list);
     }
 
+
+
+    /** 新增资源（，） */
     @PostMapping
-    public JsonResponse create(@RequestBody JCResource JCResource) {
-        resourceService.save(JCResource);
+    public JsonResponse create(@RequestBody JCResource resource) {
+        resourceService.save(resource);
         return JsonResponse.success();
     }
 
+    /** 编辑/替换资源（可以修改URL、封面、名称、章节绑定等） */
     @PutMapping
-    public JsonResponse update(@RequestBody JCResource JCResource) {
-        resourceService.updateById(JCResource);
+    public JsonResponse update(@RequestBody JCResource resource) {
+        resourceService.updateById(resource);
         return JsonResponse.success();
     }
 
+    /** 删除资源 */
     @DeleteMapping("/{id}")
     public JsonResponse delete(@PathVariable("id") Integer id) {
         resourceService.removeById(id);
         return JsonResponse.success();
     }
+
+    /** 资源详情 */
+    @GetMapping("/{id}")
+    public JsonResponse detail(@PathVariable("id") Integer id) {
+        JCResource resource = resourceService.getById(id);
+        return JsonResponse.data(resource);
+    }
 }
\ No newline at end of file
diff --git a/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ChapterContentSaveDTO.java b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ChapterContentSaveDTO.java
new file mode 100644
index 0000000..587a5ca
--- /dev/null
+++ b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ChapterContentSaveDTO.java
@@ -0,0 +1,24 @@
+package xyz.playedu.jc.domain.dto;
+
+import lombok.Data;
+
+import java.util.List;
+
+/**
+ * 章节内容保存 DTO
+ */
+@Data
+public class ChapterContentSaveDTO {
+
+    /** 富文本内容 */
+    private String content;
+
+    /** 关联资源ID列表 */
+    private List<Integer> resourceIds;
+
+    /** 关联知识点ID列表（预留，） */
+    private List<Integer> knowledgeIds;
+
+    /** 重点标记（如是否为重点章节） */
+    private Boolean highlight;
+}
\ No newline at end of file
diff --git a/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ChapterSortDTO.java b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ChapterSortDTO.java
new file mode 100644
index 0000000..119e053
--- /dev/null
+++ b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ChapterSortDTO.java
@@ -0,0 +1,18 @@
+package xyz.playedu.jc.domain.dto;
+
+import lombok.Data;
+
+/**
+ * 章节排序 / 移动 DTO
+ */
+@Data
+public class ChapterSortDTO {
+
+    private Integer id;
+
+    /** 新的父节点ID */
+    private Integer parentId;
+
+    /** 新的排序值 */
+    private Integer sort;
+}
\ No newline at end of file
diff --git a/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ResourcePageRequestDTO.java b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ResourcePageRequestDTO.java
new file mode 100644
index 0000000..6ad751a
--- /dev/null
+++ b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/dto/ResourcePageRequestDTO.java
@@ -0,0 +1,19 @@
+package xyz.playedu.jc.domain.dto;
+
+
+import lombok.Data;
+
+/**
+ * 资源分页查询条件
+ */
+@Data
+public class ResourcePageRequestDTO {
+
+    private Integer bookId;
+    private Integer chapterId;
+    private String type;      // video/ppt/img...
+    private String name;      // 模糊搜索资源名
+
+    private Long page = 1L;
+    private Long size = 20L;
+}
\ No newline at end of file
diff --git a/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/vo/ChapterTreeVO.java b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/vo/ChapterTreeVO.java
new file mode 100644
index 0000000..bc3205b
--- /dev/null
+++ b/app/api/playedu-course/src/main/java/xyz/playedu/jc/domain/vo/ChapterTreeVO.java
@@ -0,0 +1,22 @@
+package xyz.playedu.jc.domain.vo;
+
+import lombok.Data;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * 章节树节点 VO
+ */
+@Data
+public class ChapterTreeVO {
+
+    private Integer id;
+    private Integer bookId;
+    private Integer parentId;
+    private String name;
+    private Integer sort;
+    private String chapterCode;
+
+    private List<ChapterTreeVO> children = new ArrayList<>();
+}
\ No newline at end of file
diff --git a/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/IBookChapterService.java b/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/IBookChapterService.java
index 7b636ec..036539e 100644
--- a/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/IBookChapterService.java
+++ b/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/IBookChapterService.java
@@ -2,6 +2,8 @@ package xyz.playedu.jc.service;
 
 import com.baomidou.mybatisplus.extension.service.IService;
 import xyz.playedu.jc.domain.BookChapter;
+import xyz.playedu.jc.domain.dto.ChapterSortDTO;
+import xyz.playedu.jc.domain.vo.ChapterTreeVO;
 
 import java.util.List;
 
@@ -14,4 +16,16 @@ public interface IBookChapterService extends IService<BookChapter> {
      * 根据教材ID获取章节列表（已排序）
      */
     List<BookChapter> getByBookId(Integer bookId);
+
+    /** 根据教材ID获取平铺的章节列表（已按 parentId + sort 排好序） */
+    List<BookChapter> listByBookId(Integer bookId);
+
+    /** 构建章节树 */
+    List<ChapterTreeVO> treeByBookId(Integer bookId);
+
+    /** 拖拽移动章节 / 批量调整 parentId + sort */
+    void sort(Integer bookId, List<ChapterSortDTO> sorts);
+
+    /** 删除章节时做子节点/内容校验（需要的话） */
+    void removeChapter(Integer id);
 }
\ No newline at end of file
diff --git a/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/impl/BookChapterServiceImpl.java b/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/impl/BookChapterServiceImpl.java
index d1755db..4578119 100644
--- a/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/impl/BookChapterServiceImpl.java
+++ b/app/api/playedu-course/src/main/java/xyz/playedu/jc/service/impl/BookChapterServiceImpl.java
@@ -4,10 +4,15 @@ import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
 import org.springframework.stereotype.Service;
 import xyz.playedu.jc.domain.BookChapter;
+import xyz.playedu.jc.domain.dto.ChapterSortDTO;
+import xyz.playedu.jc.domain.vo.ChapterTreeVO;
 import xyz.playedu.jc.mapper.BookChapterMapper;
 import xyz.playedu.jc.service.IBookChapterService;
 
+import java.util.ArrayList;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 
 /**
  * 教材章节 Service 实现
@@ -27,5 +32,67 @@ public class BookChapterServiceImpl
         return list(wrapper);
     }
 
-    // 如果后面你要做拖拽排序、批量更新等，可以在这里继续加方法
+    @Override
+    public List<BookChapter> listByBookId(Integer bookId) {
+        LambdaQueryWrapper<BookChapter> wrapper = new LambdaQueryWrapper<>();
+        wrapper.eq(BookChapter::getBookId, bookId)
+                .orderByAsc(BookChapter::getParentId)
+                .orderByAsc(BookChapter::getSort)
+                .orderByAsc(BookChapter::getId);
+        return list(wrapper);
+    }
+
+    @Override
+    public List<ChapterTreeVO> treeByBookId(Integer bookId) {
+        List<BookChapter> chapters = listByBookId(bookId);
+        Map<Integer, ChapterTreeVO> map = new HashMap<>();
+        List<ChapterTreeVO> roots = new ArrayList<>();
+
+        for (BookChapter c : chapters) {
+            ChapterTreeVO vo = new ChapterTreeVO();
+            vo.setId(c.getId());
+            vo.setBookId(c.getBookId());
+            vo.setParentId(c.getParentId());
+            vo.setName(c.getName());
+            vo.setSort(c.getSort());
+            vo.setChapterCode(c.getChapterCode());
+            map.put(vo.getId(), vo);
+        }
+
+        for (ChapterTreeVO vo : map.values()) {
+            if (vo.getParentId() == null || vo.getParentId() == 0) {
+                roots.add(vo);
+            } else {
+                ChapterTreeVO parent = map.get(vo.getParentId());
+                if (parent != null) {
+                    parent.getChildren().add(vo);
+                } else {
+                    roots.add(vo); // 避免脏数据直接丢失
+                }
+            }
+        }
+        return roots;
+    }
+
+    @Override
+    public void sort(Integer bookId, List<ChapterSortDTO> sorts) {
+        if (sorts == null || sorts.isEmpty()) {
+            return;
+        }
+        List<BookChapter> updates = new ArrayList<>();
+        for (ChapterSortDTO dto : sorts) {
+            BookChapter entity = new BookChapter();
+            entity.setId(dto.getId());
+            entity.setParentId(dto.getParentId());
+            entity.setSort(dto.getSort());
+            updates.add(entity);
+        }
+        updateBatchById(updates);
+    }
+
+    @Override
+    public void removeChapter(Integer id) {
+        //todo 校验是否有子节点 / 内容
+        removeById(id);
+    }
 }
\ No newline at end of file