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+# 接口变更记录 — 2026-03-27 10:26
+
+> **提交** `e18405c` · **作者** wx · **时间** 2026-03-27 10:26:31 +0800
+>
+> feat: 产品新增研学收获模块，设计与安全保障一致
+
+## 变更总览
+
+- **产品服务**
+  - 🆕 ProductStudyGain (+4 接口)
+
+---
+
+## 产品服务
+
+### 🆕 新增: ProductStudyGain
+
+> 📖 **接口文档**: [http://192.168.100.236:8085/doc.html](http://192.168.100.236:8085/doc.html) → 标签 **「产品研学收获管理」**
+
+### 📌 `GET` /admin/product/{productId}/study-gain — 列表
+
+**参数**
+
+  - `{productId}` (`Long`) — 路径参数
+
+**响应** `Result<List<Map<String, Object>>>`
+
+### 📌 `POST` /admin/product/{productId}/study-gain — 添加
+
+**参数**
+
+  - `{productId}` (`Long`) — 路径参数
+
+**请求体** `StudyGainRequest`
+
+**响应** `Result<Map<String, Object>>`
+
+### 📌 `PUT` /admin/product/{productId}/study-gain/{id} — 更新
+
+**参数**
+
+  - `{productId}` (`Long`) — 路径参数
+  - `{id}` (`Long`) — 路径参数
+
+**请求体** `StudyGainRequest`
+
+**响应** `Result<Map<String, Object>>`
+
+### 📌 `DELETE` /admin/product/{productId}/study-gain/{id} — 删除
+
+**参数**
+
+  - `{productId}` (`Long`) — 路径参数
+  - `{id}` (`Long`) — 路径参数
+
+**响应** `Result<Void>`
+
+---
+
+## 📦 其他数据对象变更
+
+> 以下变更未直接关联到本次接口变更，但可能影响现有接口的请求/响应
+
+### 产品服务
+
+#### ✏️ ProductVO
+
+  - 🆕 `studyGains` (`List<Map<String, String>>`) — 研学收获列表[{icon,title,description}]
+
+<details>
+<summary>📁 全部变更文件 (点击展开)</summary>
+
+```
+A	hl-product-service/src/main/java/com/hulalv/product/controller/ProductStudyGainController.java
+A	hl-product-service/src/main/java/com/hulalv/product/entity/ProductStudyGain.java
+A	hl-product-service/src/main/java/com/hulalv/product/mapper/ProductStudyGainMapper.java
+M	hl-product-service/src/main/java/com/hulalv/product/service/ProductService.java
+M	hl-product-service/src/main/java/com/hulalv/product/vo/ProductVO.java
+M	hl-product-service/src/test/java/com/hulalv/product/service/MpProductServiceTest.java
+M	hl-product-service/src/test/java/com/hulalv/product/service/ProductServiceTest.java
+```
+</details>
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