diff --git a/src/components/PlanDetail.vue b/src/components/PlanDetail.vue
index f4fe92ee..a542afcc 100644
--- a/src/components/PlanDetail.vue
+++ b/src/components/PlanDetail.vue
@@ -13,40 +13,49 @@
       />
       <el-button type="primary" @click="fetchPlan" class="retry-btn">重新加载</el-button>
     </div>
-    <div v-else-if="plan">
+    <div v-else-if="plan && plan.id">
       <el-card class="box-card">
         <template #header>
           <div class="card-header">
             <span>{{ plan.name }} - 内容</span>
             <div>
-              <el-button class="button" @click="toggleEditMode">{{ isEditingContent ? '完成编辑' : '编辑内容' }}</el-button>
-              <el-button
-                v-if="isEditingContent && plan.content_type === 'sub_plans'"
-                type="primary"
-                size="small"
-                @click="showAddSubPlanDialog"
-              >增加子计划</el-button>
-              <el-button
-                v-if="isEditingContent && plan.content_type === 'tasks'"
-                type="primary"
-                size="small"
-                @click="showAddTaskDialog"
-              >增加子任务</el-button>
+              <el-button class="button" @click="toggleEditMode" v-if="!isSubPlan">{{ isEditingContent ? '完成编辑' : '编辑内容' }}</el-button>
+
+              <!-- Dynamic Add Buttons -->
+              <template v-if="isEditingContent">
+                <el-button
+                  v-if="plan.content_type === 'sub_plans' || !plan.content_type"
+                  type="primary"
+                  size="small"
+                  @click="showAddSubPlanDialog"
+                >增加子计划</el-button>
+                <el-button
+                  v-if="plan.content_type === 'tasks' || !plan.content_type"
+                  type="primary"
+                  size="small"
+                  @click="showAddTaskDialog"
+                >增加子任务</el-button>
+              </template>
             </div>
           </div>
         </template>
+
+        <!-- Display Tasks -->
         <div v-if="plan.content_type === 'tasks'">
           <h4>任务列表</h4>
-          <el-timeline>
+          <el-timeline v-if="plan.tasks.length > 0">
             <el-timeline-item
-              v-for="(task, index) in sortedContent"
+              v-for="(task, index) in plan.tasks"
               :key="task.id || 'new-task-' + index"
-              :timestamp="'执行顺序: ' + (task.order !== undefined ? task.order : index + 1)"
+              :timestamp="'执行顺序: ' + (task.execution_order !== undefined ? task.execution_order : index + 1)"
               placement="top"
             >
               <el-card>
-                <h5>{{ task.name }}</h5>
+                <h5>{{ task.name }} ({{ task.type === 'delay_task' ? '延时任务' : '未知任务' }})</h5>
                 <p>{{ task.description }}</p>
+                <p v-if="task.type === 'delay_task' && task.parameters?.delay_seconds">
+                  延时: {{ task.parameters.delay_seconds }} 秒
+                </p>
                 <el-button-group v-if="isEditingContent">
                   <el-button type="primary" size="small" @click="editTask(task)">编辑</el-button>
                   <el-button type="danger" size="small" @click="deleteTask(task)">删除</el-button>
@@ -54,24 +63,30 @@
               </el-card>
             </el-timeline-item>
           </el-timeline>
-          <el-empty v-if="!sortedContent.length && !isEditingContent" description="暂无任务"></el-empty>
+          <el-empty v-else description="暂无任务"></el-empty>
         </div>
+
+        <!-- Display Sub-plans -->
         <div v-else-if="plan.content_type === 'sub_plans'">
           <h4>子计划列表</h4>
-          <div v-for="(subPlan, index) in sortedContent" :key="subPlan.id || 'new-subplan-' + index" class="sub-plan-container">
-            <el-card>
-              <div class="card-header">
-                <plan-detail :plan-id="subPlan.id" />
-                <el-button-group v-if="isEditingContent">
-                  <el-button type="danger" size="small" @click="deleteSubPlan(subPlan)">删除</el-button>
-                </el-button-group>
-              </div>
-            </el-card>
+          <div v-if="plan.sub_plans.length > 0">
+            <div v-for="(subPlan, index) in plan.sub_plans" :key="subPlan.id || 'new-subplan-' + index" class="sub-plan-container">
+              <el-card>
+                <div class="card-header">
+                  <!-- Pass child_plan_id to recursive PlanDetail -->
+                  <plan-detail :plan-id="subPlan.child_plan_id" :is-sub-plan="true" />
+                  <el-button-group v-if="isEditingContent">
+                    <el-button type="danger" size="small" @click="deleteSubPlan(subPlan)">删除</el-button>
+                  </el-button-group>
+                </div>
+              </el-card>
+            </div>
           </div>
-          <el-empty v-if="!sortedContent.length && !isEditingContent" description="暂无子计划"></el-empty>
+          <el-empty v-else description="暂无子计划"></el-empty>
         </div>
-        <div v-else>
-          <el-empty description="未知的计划内容类型"></el-empty>
+
+        <div v-else-if="!plan.content_type">
+          <el-empty description="请添加子计划或子任务"></el-empty>
         </div>
       </el-card>
     </div>
@@ -79,7 +94,7 @@
       <el-empty description="没有计划数据"></el-empty>
     </div>
 
-    <!-- 增加子计划对话框 -->
+    <!-- Add Sub-plan Dialog -->
     <el-dialog
       v-model="addSubPlanDialogVisible"
       title="选择子计划"
@@ -107,7 +122,7 @@
       </template>
     </el-dialog>
 
-    <!-- 增加子任务对话框 -->
+    <!-- Add Task Dialog -->
     <el-dialog
       v-model="addTaskDialogVisible"
       title="增加子任务"
@@ -117,9 +132,8 @@
       <el-form :model="newTaskForm" ref="newTaskFormRef" :rules="newTaskRules" label-width="100px">
         <el-form-item label="任务类型" prop="type">
           <el-select v-model="newTaskForm.type" placeholder="请选择任务类型" style="width: 100%;">
-            <el-option label="普通任务" value="normal_task"></el-option>
+            <!-- Only Delay Task for now -->
             <el-option label="延时任务" value="delay_task"></el-option>
-            <!-- 更多任务类型可以在这里添加 -->
           </el-select>
         </el-form-item>
         <el-form-item label="任务名称" prop="name">
@@ -128,21 +142,16 @@
         <el-form-item label="任务描述" prop="description">
           <el-input type="textarea" v-model="newTaskForm.description" placeholder="请输入任务描述"></el-input>
         </el-form-item>
-        <!-- 延时任务特有字段 -->
-        <el-form-item
-          v-if="newTaskForm.type === 'delay_task'"
-          label="延时时间(秒)"
-          prop="delay_seconds"
-        >
-          <el-input-number
-            v-model="newTaskForm.delay_seconds"
-            :min="1"
-            :max="3600"
-            placeholder="请输入延时时间"
-            style="width: 100%;"
-          ></el-input-number>
-        </el-form-item>
-        <!-- 更多任务类型的特定表单项可以在这里动态渲染 -->
+        <!-- Dynamic task component for specific parameters -->
+        <template v-if="newTaskForm.type === 'delay_task'">
+          <DelayTaskEditor
+            :parameters="newTaskForm.parameters"
+            @update:parameters="val => newTaskForm.parameters = val"
+            prop-prefix="parameters."
+            :is-editing="true" /><!-- Always editable when adding a new task -->
+
+        </template>
+        <!-- More task types can be rendered here -->
       </el-form>
       <template #footer>
         <span class="dialog-footer">
@@ -156,48 +165,69 @@
 
 <script>
 import apiClient from '../api/index.js';
-import { ElMessage, ElMessageBox } from 'element-plus'; // 导入ElMessage和ElMessageBox
+import { ElMessage, ElMessageBox } from 'element-plus';
+import { ArrowDown } from '@element-plus/icons-vue'; // Keep ArrowDown for potential future use or if other dropdowns exist
+import DelayTaskEditor from './tasks/DelayTask.vue'; // Import the new component
 
 export default {
-  name: 'PlanDetail', // 必须设置name属性以供递归调用
+  name: 'PlanDetail',
+  components: {
+    DelayTaskEditor, // Register the new component
+    // Self-reference for recursion
+    'plan-detail': this,
+    ArrowDown, // Register ArrowDown
+  },
   props: {
     planId: {
       type: [Number, String],
       required: true,
     },
+    isSubPlan: {
+      type: Boolean,
+      default: false,
+    },
   },
   data() {
     return {
-      plan: null,
-      loading: false,
-      error: null,
-      isEditingContent: false, // 新增：是否处于编辑内容模式
-      addSubPlanDialogVisible: false, // 控制增加子计划对话框
-      selectedSubPlanId: null, // 选中的子计划ID
-      availablePlans: [], // 可供选择的计划列表
-
-      addTaskDialogVisible: false, // 控制增加子任务对话框
-      newTaskForm: { // 新任务表单数据
-        type: 'normal_task', // 默认任务类型
+      plan: {
+        id: null,
         name: '',
         description: '',
-        delay_seconds: 1, // 延时任务特有字段
+        execution_type: 'automatic',
+        execute_num: 0,
+        cron_expression: '',
+        content_type: null, // Will be 'sub_plans', 'tasks', or null
+        sub_plans: [], // Array of plan.SubPlanResponse
+        tasks: [],     // Array of plan.TaskResponse
       },
-      newTaskRules: { // 新任务表单验证规则
+      loading: false,
+      error: null,
+      isEditingContent: false,
+
+      // Add Sub-plan dialog
+      addSubPlanDialogVisible: false,
+      selectedSubPlanId: null,
+      availablePlans: [],
+
+      // Add Task dialog
+      addTaskDialogVisible: false,
+      newTaskForm: {
+        type: 'delay_task', // Default to delay_task since normal_task is removed
+        name: '',
+        description: '',
+        parameters: {},
+      },
+      newTaskRules: {
         type: [{ required: true, message: '请选择任务类型', trigger: 'change' }],
         name: [{ required: true, message: '请输入任务名称', trigger: 'blur' }],
-        delay_seconds: [{ required: true, message: '请输入延时时间', trigger: 'blur' }],
       },
     };
   },
   computed: {
-    sortedContent() {
-      if (this.plan && Array.isArray(this.plan.content)) {
-        // 假设 `content` 是一个包含 `order` 属性的对象的数组
-        return [...this.plan.content].sort((a, b) => (a.order || 0) - (b.order || 0));
-      }
-      return [];
-    }
+    // Rules for delay_seconds, dynamically added/removed
+    delaySecondsRules() {
+      return [{ required: true, message: '请输入延时时间', trigger: 'blur' }];
+    },
   },
   watch: {
     planId: {
@@ -208,6 +238,26 @@ export default {
         }
       },
     },
+    // Watch for newTaskForm.type changes to update validation rules
+    'newTaskForm.type'(newType) {
+      if (newType === 'delay_task') {
+        // Direct assignment for reactive object
+        this.newTaskRules['parameters.delay_seconds'] = this.delaySecondsRules;
+        // Initialize parameters if not already present
+        if (!this.newTaskForm.parameters.delay_seconds) {
+          this.newTaskForm.parameters.delay_seconds = 1;
+        }
+      } else {
+        // Remove delay_seconds rule if not delay_task
+        if (this.newTaskRules['parameters.delay_seconds']) {
+          delete this.newTaskRules['parameters.delay_seconds'];
+        }
+        // Clear delay_seconds parameter if not delay_task
+        if (this.newTaskForm.parameters.delay_seconds) {
+          delete this.newTaskForm.parameters.delay_seconds;
+        }
+      }
+    },
   },
   methods: {
     async fetchPlan() {
@@ -215,11 +265,12 @@ export default {
       this.error = null;
       try {
         const response = await apiClient.plans.get(this.planId);
-        this.plan = response.data;
-        // 确保content是一个数组，如果后端返回null或undefined
-        if (!this.plan.content) {
-          this.plan.content = [];
-        }
+        this.plan = {
+          ...response.data,
+          sub_plans: response.data.sub_plans || [],
+          tasks: response.data.tasks || [],
+        };
+        this.updateContentType(); // Set initial content_type based on fetched data
       } catch (err) {
         this.error = err.message || '未知错误';
         console.error(`加载计划 (ID: ${this.planId}) 失败:`, err);
@@ -227,34 +278,88 @@ export default {
         this.loading = false;
       }
     },
+    updateContentType() {
+      if (this.plan.sub_plans.length > 0) {
+        this.plan.content_type = 'sub_plans';
+      } else if (this.plan.tasks.length > 0) {
+        this.plan.content_type = 'tasks';
+      } else {
+        this.plan.content_type = null; // Or an empty string to indicate no content type yet
+      }
+    },
     toggleEditMode() {
       this.isEditingContent = !this.isEditingContent;
       if (!this.isEditingContent) {
-        // 如果退出编辑模式，保存更改
         this.savePlanContent();
       }
     },
     async savePlanContent() {
+      this.updateContentType(); // Ensure content_type is correct before saving
       try {
-        // 假设有一个API来更新计划的内容
-        await apiClient.plans.updateContent(this.planId, this.plan.content);
+        const submitData = {
+          id: this.plan.id, // Ensure ID is included for update
+          name: this.plan.name,
+          description: this.plan.description,
+          execution_type: this.plan.execution_type,
+          execute_num: this.plan.execute_num,
+          cron_expression: this.plan.cron_expression,
+          content_type: this.plan.content_type,
+          // Only send sub_plan_ids or tasks based on content_type
+          sub_plan_ids: this.plan.content_type === 'sub_plans'
+            ? this.plan.sub_plans.map(sp => sp.child_plan_id) // Extract child_plan_id
+            : [],
+          tasks: this.plan.content_type === 'tasks'
+            ? this.plan.tasks.map((task, index) => ({
+                name: task.name,
+                description: task.description,
+                type: task.type,
+                execution_order: index + 1, // Re-order before sending
+                parameters: task.parameters || {},
+              }))
+            : [],
+        };
+
+        // Remove properties that are not part of UpdatePlanRequest but are in this.plan
+        // These are typically read-only or derived fields
+        delete submitData.execute_count;
+        delete submitData.status;
+
+        await apiClient.plans.update(this.planId, submitData);
         ElMessage.success('计划内容已保存');
+        this.fetchPlan(); // Re-fetch to get updated data from backend
       } catch (error) {
         ElMessage.error('保存计划内容失败: ' + (error.message || '未知错误'));
         console.error('保存计划内容失败:', error);
       }
     },
+
+    // --- Sub-plan related methods ---
     async showAddSubPlanDialog() {
+      // If there are existing tasks, warn the user
+      if (this.plan.tasks.length > 0) {
+        try {
+          await ElMessageBox.confirm('当前计划包含任务，添加子计划将清空现有任务。是否继续？', '警告', {
+            confirmButtonText: '确定',
+            cancelButtonText: '取消',
+            type: 'warning'
+          });
+          this.plan.tasks = []; // Clear tasks
+          // No need to force content_type here, updateContentType will handle it
+        } catch (e) {
+          // User cancelled
+          return;
+        }
+      }
       this.addSubPlanDialogVisible = true;
       await this.fetchAvailablePlans();
     },
     async fetchAvailablePlans() {
       try {
         const response = await apiClient.plans.list();
-        // 过滤掉当前计划和已有的子计划，以及防止循环引用
+        // Filter out current plan, already added sub-plans, and prevent circular references
         this.availablePlans = response.data.plans.filter(p =>
           p.id !== this.planId &&
-          !this.plan.content.some(sub => sub.id === p.id)
+          !this.plan.sub_plans.some(sub => sub.child_plan_id === p.id)
         );
       } catch (error) {
         ElMessage.error('加载可用计划失败: ' + (error.message || '未知错误'));
@@ -269,17 +374,13 @@ export default {
 
       const selectedPlan = this.availablePlans.find(p => p.id === this.selectedSubPlanId);
       if (selectedPlan) {
-        // 确保content_type是sub_plans
-        if (this.plan.content_type !== 'sub_plans') {
-          this.plan.content_type = 'sub_plans';
-          this.plan.content = []; // 清空原有内容
-        }
-        this.plan.content.push({
-          id: selectedPlan.id,
-          name: selectedPlan.name,
-          order: this.plan.content.length + 1, // 简单的排序
-          // 可以根据需要添加其他字段
+        this.plan.sub_plans.push({
+          id: Date.now(), // Temporary ID for UI, actual ID from backend after save
+          child_plan_id: selectedPlan.id,
+          child_plan: selectedPlan, // Store full plan for display if needed
+          execution_order: this.plan.sub_plans.length + 1,
         });
+        this.updateContentType(); // Update content type
         ElMessage.success(`子计划 "${selectedPlan.name}" 已添加`);
         this.addSubPlanDialogVisible = false;
         this.resetAddSubPlanDialog();
@@ -292,46 +393,53 @@ export default {
       this.availablePlans = [];
     },
     deleteSubPlan(subPlanToDelete) {
-      ElMessageBox.confirm(`确认删除子计划 "${subPlanToDelete.name}" 吗？`, '提示', {
+      ElMessageBox.confirm(`确认删除子计划 "${subPlanToDelete.child_plan?.name || '未知子计划'}" 吗？`, '提示', {
         confirmButtonText: '确定',
         cancelButtonText: '取消',
         type: 'warning'
       }).then(() => {
-        this.plan.content = this.plan.content.filter(sub => sub.id !== subPlanToDelete.id);
-        // 重新排序
-        this.plan.content.forEach((item, index) => item.order = index + 1);
+        this.plan.sub_plans = this.plan.sub_plans.filter(sub => sub.id !== subPlanToDelete.id);
+        this.plan.sub_plans.forEach((item, index) => item.execution_order = index + 1); // Re-order
+        this.updateContentType(); // Update content type
         ElMessage.success('子计划已删除');
       }).catch(() => {
-        // 用户取消
+        // User cancelled
       });
     },
 
-    showAddTaskDialog() {
+    // --- Task related methods ---
+    async showAddTaskDialog() {
+      // If there are existing sub-plans, warn the user
+      if (this.plan.sub_plans.length > 0) {
+        try {
+          await ElMessageBox.confirm('当前计划包含子计划，添加任务将清空现有子计划。是否继续？', '警告', {
+            confirmButtonText: '确定',
+            cancelButtonText: '取消',
+            type: 'warning'
+          });
+          this.plan.sub_plans = []; // Clear sub-plans
+          // No need to force content_type here, updateContentType will handle it
+        } catch (e) {
+          // User cancelled
+          return;
+        }
+      }
       this.addTaskDialogVisible = true;
     },
     confirmAddTask() {
       this.$refs.newTaskFormRef.validate(async (valid) => {
         if (valid) {
-          // 确保content_type是tasks
-          if (this.plan.content_type !== 'tasks') {
-            this.plan.content_type = 'tasks';
-            this.plan.content = []; // 清空原有内容
-          }
-
           const newTask = {
-            id: Date.now(), // 临时ID，实际应由后端生成
-            order: this.plan.content.length + 1,
+            id: Date.now(), // Temporary ID for UI, actual ID from backend after save
+            execution_order: this.plan.tasks.length + 1,
             type: this.newTaskForm.type,
             name: this.newTaskForm.name,
             description: this.newTaskForm.description,
+            parameters: this.newTaskForm.parameters, // Include parameters
           };
 
-          if (this.newTaskForm.type === 'delay_task') {
-            newTask.delay_seconds = this.newTaskForm.delay_seconds;
-          }
-          // 可以在这里根据任务类型添加更多字段
-
-          this.plan.content.push(newTask);
+          this.plan.tasks.push(newTask);
+          this.updateContentType(); // Update content type
           ElMessage.success(`子任务 "${newTask.name}" 已添加`);
           this.addTaskDialogVisible = false;
           this.resetAddTaskDialog();
@@ -341,14 +449,14 @@ export default {
     resetAddTaskDialog() {
       this.$refs.newTaskFormRef.resetFields();
       this.newTaskForm = {
-        type: 'normal_task',
+        type: 'delay_task', // Default to delay_task
         name: '',
         description: '',
-        delay_seconds: 1,
+        parameters: {},
       };
     },
     editTask(task) {
-      // TODO: 实现编辑任务的逻辑，可能需要一个单独的对话框
+      // TODO: Implement edit task logic, possibly with a separate dialog
       ElMessage.info('编辑任务功能正在开发中');
       console.log('编辑任务:', task);
     },
@@ -358,12 +466,12 @@ export default {
         cancelButtonText: '取消',
         type: 'warning'
       }).then(() => {
-        this.plan.content = this.plan.content.filter(task => task.id !== taskToDelete.id);
-        // 重新排序
-        this.plan.content.forEach((item, index) => item.order = index + 1);
+        this.plan.tasks = this.plan.tasks.filter(task => task.id !== taskToDelete.id);
+        this.plan.tasks.forEach((item, index) => item.execution_order = index + 1); // Re-order
+        this.updateContentType(); // Update content type
         ElMessage.success('任务已删除');
       }).catch(() => {
-        // 用户取消
+        // User cancelled
       });
     },
   },
diff --git a/src/components/tasks/DelayTask.vue b/src/components/tasks/DelayTask.vue
new file mode 100644
index 00000000..2fd60b25
--- /dev/null
+++ b/src/components/tasks/DelayTask.vue
@@ -0,0 +1,65 @@
+<template>
+  <div class="delay-task-editor">
+    <el-form-item
+      label="延时时间(秒)"
+      :prop="propPrefix + 'parameters.delay_seconds'"
+      :rules="isEditing ? {
+        required: true,
+        message: '请输入延时时间',
+        trigger: 'blur'
+      } : null"
+    >
+      <el-input-number
+        :model-value="delaySeconds"
+        @update:model-value="updateDelaySeconds"
+        :min="1"
+        placeholder="请输入延时时间"
+        style="width: 100%;"
+        :disabled="!isEditing"
+      ></el-input-number>
+    </el-form-item>
+  </div>
+</template>
+
+<script>
+export default {
+  name: "DelayTaskEditor",
+  props: {
+    // The parameters object for the task
+    parameters: {
+      type: Object,
+      required: true,
+    },
+    // A prefix for the form item prop to ensure unique validation
+    propPrefix: {
+      type: String,
+      default: "",
+    },
+    // New prop to control editability
+    isEditing: {
+      type: Boolean,
+      default: true,
+    },
+  },
+  emits: ["update:parameters"],
+  computed: {
+    delaySeconds() {
+      return this.parameters?.delay_seconds || 1;
+    },
+  },
+  methods: {
+    updateDelaySeconds(value) {
+      this.$emit("update:parameters", {
+        ...this.parameters,
+        delay_seconds: value,
+      });
+    },
+  },
+};
+</script>
+
+<style scoped>
+.delay-task-editor {
+  width: 100%;
+}
+</style>