diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..40648ee
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,104 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+DesignHub is a full-stack Designer Task Management Platform (设计师任务抢单管理系统) - a task distribution and management system with a point-based incentive mechanism.
+
+**Tech Stack:**
+- **Frontend**: Vue 3 + TypeScript + Ant Design Vue + Pinia + Vite
+- **Backend**: Spring Boot 3.x (Java 17) + MySQL + MyBatis Plus + Redis
+- **Authentication**: JWT tokens with RBAC (7 roles)
+
+## Common Commands
+
+### Frontend (cd frontend)
+```bash
+pnpm install          # Install dependencies
+pnpm dev              # Start dev server (port 3000)
+pnpm build            # Build for production
+pnpm lint             # Lint and fix code
+pnpm format           # Format with Prettier
+```
+
+### Backend (cd backend)
+```bash
+mvn clean install -DskipTests   # Build project
+mvn spring-boot:run             # Start dev server (port 8080)
+java -jar target/designhub-backend-*.jar  # Run compiled JAR
+```
+
+### Database
+```bash
+mysql -u root -p < database/schema.sql
+mysql -u root -p < database/init-data.sql
+```
+
+## Architecture
+
+### Backend Structure
+```
+backend/src/main/java/com/designhub/
+├── annotation/      # Custom annotations (@RequirePermission, @RequireRole)
+├── common/          # Result wrapper, ResultCode enums
+├── config/          # Spring configs (Cors, MyBatis, Swagger, Web)
+├── controller/      # REST APIs (38 controllers)
+├── dto/             # Request DTOs
+├── entity/          # JPA entities (53 tables)
+├── exception/       # Business exceptions
+├── interceptor/     # Auth interceptor
+├── mapper/          # MyBatis mappers
+├── service/         # Business logic (41 services)
+├── util/            # JwtUtil, ExcelExportUtil, etc.
+└── vo/              # Response View Objects
+```
+
+### Frontend Structure
+```
+frontend/src/
+├── api/             # Axios API modules (task.ts, user.ts, auth.ts, etc.)
+├── components/      # Reusable components (TaskCard, Navbar, etc.)
+├── composables/     # Vue composables
+├── layouts/         # Layout wrappers
+├── router/          # Vue Router config
+├── stores/          # Pinia stores (auth, config, siteSettings)
+├── types/           # TypeScript interfaces
+├── utils/           # Utility functions
+└── views/           # Page components (27 views)
+```
+
+### API Documentation
+- Swagger UI: http://localhost:8080/doc.html (when backend running)
+- Frontend dev server proxies `/api` to `http://localhost:8080`
+
+## Key Conventions
+
+### Backend
+- Custom permission annotations: `@RequirePermission`, `@RequireRole` on controller methods
+- Response format: `Result<T>` wrapper with `ResultCode` enum for status codes
+- JWT tokens stored in `Authorization` header (Bearer scheme)
+
+### Frontend
+- Auto-imported Vue components via `unplugin-vue-components`
+- API calls use axios with JWT in localStorage
+- Vue Composition API (`<script setup>`)
+
+### Git Commit Format
+```
+feat: 新功能
+fix: Bug修复
+docs: 文档更新
+style: 代码格式
+refactor: 重构
+perf: 性能优化
+test: 测试相关
+```
+
+## Entry Points
+- Frontend main: `frontend/src/main.ts`
+- Backend main: `backend/src/main/java/com/designhub/DesignHubApplication.java`
+- Dev config: `backend/src/main/resources/application-dev.yml`
+
+## Default Credentials
+- Admin: `admin` / `123456`
diff --git a/backend/src/main/java/com/designhub/service/TaskApprovalService.java b/backend/src/main/java/com/designhub/service/TaskApprovalService.java
index f120be8..ce6a0cb 100644
--- a/backend/src/main/java/com/designhub/service/TaskApprovalService.java
+++ b/backend/src/main/java/com/designhub/service/TaskApprovalService.java
@@ -1094,36 +1094,8 @@ public class TaskApprovalService {
         for (TaskItem item : taskItems) {
             boolean needUpdate = false;
             
-            // 检查子任务的 taskTypeId 是否在更新列表中
-            if (item.getTaskTypeId() != null && typeUpdateMap.containsKey(item.getTaskTypeId())) {
-                TaskUpdateDTO.TaskTypeUpdateDTO typeUpdate = typeUpdateMap.get(item.getTaskTypeId());
-                Integer newQuantity = typeUpdate.getQuantity();
-                
-                if (newQuantity != null && !newQuantity.equals(item.getQuantity())) {
-                    // 获取单价积分
-                    java.math.BigDecimal unitScore = item.getUnitScore();
-                    if (unitScore == null) {
-                        // 如果没有单价，从配置中获取
-                        DemandType demandType = configService.getDemandTypeById(item.getTaskTypeId());
-                        if (demandType != null && demandType.getUnitScore() != null) {
-                            unitScore = demandType.getUnitScore();
-                        } else {
-                            unitScore = java.math.BigDecimal.ZERO;
-                        }
-                    }
-                    
-                    // 更新数量和总积分
-                    item.setQuantity(newQuantity);
-                    item.setTotalScore(unitScore.multiply(new java.math.BigDecimal(newQuantity)));
-                    item.setUpdateTime(LocalDateTime.now());
-                    needUpdate = true;
-                    
-                    log.info("更新子任务数量和积分: itemId={}, taskTypeId={}, oldQuantity={}, newQuantity={}, unitScore={}, newTotalScore={}", 
-                        item.getId(), item.getTaskTypeId(), item.getQuantity(), newQuantity, unitScore, item.getTotalScore());
-                }
-            }
-            
-            // 🔥 同时更新 typeDetails JSON 字段（如果存在）
+            // 🔥 先更新 typeDetails JSON 字段（如果存在）
+            // 这样后面可以从更新后的 typeDetails 中正确计算总积分
             if (item.getTypeDetails() != null && !item.getTypeDetails().isEmpty()) {
                 String updatedTypeDetails = updateTypeDetailsJson(item.getTypeDetails(), typeUpdateMap);
                 if (!item.getTypeDetails().equals(updatedTypeDetails)) {
@@ -1131,6 +1103,51 @@ public class TaskApprovalService {
                     item.setUpdateTime(LocalDateTime.now());
                     needUpdate = true;
                     log.info("更新子任务typeDetails: itemId={}, newTypeDetails={}", item.getId(), updatedTypeDetails);
+                    
+                    // 🔥 从更新后的 typeDetails 中重新计算总积分和总数量
+                    // 这是修复多任务类型子任务积分计算错误的关键
+                    java.math.BigDecimal newTotalScore = calculateTotalScoreFromTypeDetails(updatedTypeDetails);
+                    int newTotalQuantity = calculateTotalQuantityFromTypeDetails(updatedTypeDetails);
+                    
+                    if (newTotalScore != null) {
+                        item.setTotalScore(newTotalScore);
+                        log.info("从typeDetails重新计算子任务总积分: itemId={}, newTotalScore={}", item.getId(), newTotalScore);
+                    }
+                    if (newTotalQuantity > 0) {
+                        item.setQuantity(newTotalQuantity);
+                        // 重新计算平均单价
+                        if (newTotalScore != null && newTotalQuantity > 0) {
+                            item.setUnitScore(newTotalScore.divide(new java.math.BigDecimal(newTotalQuantity), 2, java.math.RoundingMode.HALF_UP));
+                        }
+                        log.info("从typeDetails重新计算子任务总数量: itemId={}, newTotalQuantity={}", item.getId(), newTotalQuantity);
+                    }
+                }
+            } else {
+                // 如果没有 typeDetails，使用原来的单类型逻辑
+                if (item.getTaskTypeId() != null && typeUpdateMap.containsKey(item.getTaskTypeId())) {
+                    TaskUpdateDTO.TaskTypeUpdateDTO typeUpdate = typeUpdateMap.get(item.getTaskTypeId());
+                    Integer newQuantity = typeUpdate.getQuantity();
+                    
+                    if (newQuantity != null && !newQuantity.equals(item.getQuantity())) {
+                        // 获取单价积分
+                        java.math.BigDecimal unitScore = item.getUnitScore();
+                        if (unitScore == null) {
+                            DemandType demandType = configService.getDemandTypeById(item.getTaskTypeId());
+                            if (demandType != null && demandType.getUnitScore() != null) {
+                                unitScore = demandType.getUnitScore();
+                            } else {
+                                unitScore = java.math.BigDecimal.ZERO;
+                            }
+                        }
+                        
+                        item.setQuantity(newQuantity);
+                        item.setTotalScore(unitScore.multiply(new java.math.BigDecimal(newQuantity)));
+                        item.setUpdateTime(LocalDateTime.now());
+                        needUpdate = true;
+                        
+                        log.info("更新单类型子任务数量和积分: itemId={}, taskTypeId={}, newQuantity={}, newTotalScore={}", 
+                            item.getId(), item.getTaskTypeId(), newQuantity, item.getTotalScore());
+                    }
                 }
             }
             
@@ -1142,6 +1159,52 @@ public class TaskApprovalService {
         log.info("完成子任务数量和积分更新: taskId={}, 子任务数量={}", taskId, taskItems.size());
     }
     
+    /**
+     * 从 typeDetails JSON 中计算总积分
+     */
+    private java.math.BigDecimal calculateTotalScoreFromTypeDetails(String typeDetails) {
+        try {
+            com.fasterxml.jackson.databind.JsonNode rootNode = objectMapper.readTree(typeDetails);
+            if (!rootNode.isArray()) {
+                return null;
+            }
+            
+            java.math.BigDecimal totalScore = java.math.BigDecimal.ZERO;
+            for (com.fasterxml.jackson.databind.JsonNode itemNode : rootNode) {
+                if (itemNode.has("totalScore")) {
+                    totalScore = totalScore.add(new java.math.BigDecimal(itemNode.get("totalScore").asDouble()));
+                }
+            }
+            return totalScore.setScale(2, java.math.RoundingMode.HALF_UP);
+        } catch (Exception e) {
+            log.error("计算typeDetails总积分失败: {}", e.getMessage());
+            return null;
+        }
+    }
+    
+    /**
+     * 从 typeDetails JSON 中计算总数量
+     */
+    private int calculateTotalQuantityFromTypeDetails(String typeDetails) {
+        try {
+            com.fasterxml.jackson.databind.JsonNode rootNode = objectMapper.readTree(typeDetails);
+            if (!rootNode.isArray()) {
+                return 0;
+            }
+            
+            int totalQuantity = 0;
+            for (com.fasterxml.jackson.databind.JsonNode itemNode : rootNode) {
+                if (itemNode.has("quantity")) {
+                    totalQuantity += itemNode.get("quantity").asInt();
+                }
+            }
+            return totalQuantity;
+        } catch (Exception e) {
+            log.error("计算typeDetails总数量失败: {}", e.getMessage());
+            return 0;
+        }
+    }
+    
     /**
      * 更新 typeDetails JSON 中的数量
      */