diff --git a/frontend/src/pages/DagCanvas.tsx b/frontend/src/pages/DagCanvas.tsx
index a6f873e..700da04 100644
--- a/frontend/src/pages/DagCanvas.tsx
+++ b/frontend/src/pages/DagCanvas.tsx
@@ -14,8 +14,6 @@ import {
 import type { Node, Edge, Connection, NodeProps } from 'reactflow';
 import 'reactflow/dist/style.css';
 import {
-  Card,
-  Select,
   Button,
   Space,
   message,
@@ -30,9 +28,10 @@ import {
   ReloadOutlined,
   DeleteOutlined,
 } from '@ant-design/icons';
-import { projectApi, dagApi } from '@/api';
-import type { Project, TaskStatus, DagGraphNode, DagGraphEdge } from '@/types';
+import { dagApi } from '@/api';
+import type { TaskStatus, DagGraphNode, DagGraphEdge } from '@/types';
 import { taskStatusConfig, priorityConfig } from '@/components/constants';
+import TaskDetailModal from '@/components/TaskDetailModal';
 
 const { Text } = Typography;
 
@@ -52,6 +51,7 @@ function TaskNode({ data }: NodeProps) {
         borderRadius: 8,
         boxShadow: '0 2px 8px rgba(0,0,0,0.08)',
         overflow: 'hidden',
+        cursor: 'pointer',
       }}
     >
       <Handle type="target" position={Position.Top} />
@@ -121,23 +121,19 @@ function layoutNodes(graphNodes: DagGraphNode[], graphEdges: DagGraphEdge[]) {
   return positions;
 }
 
-export default function DagCanvas() {
-  const [projects, setProjects] = useState<Project[]>([]);
-  const [projectId, setProjectId] = useState<number | undefined>();
+interface Props {
+  projectId: number;
+}
+
+/** DAG 编排画布（嵌入项目详情页使用） */
+export default function DagCanvas({ projectId }: Props) {
   const [nodes, setNodes, onNodesChange] = useNodesState([]);
   const [edges, setEdges, onEdgesChange] = useEdgesState([]);
   const [loading, setLoading] = useState(false);
   const [executing, setExecuting] = useState(false);
   const [selectedEdge, setSelectedEdge] = useState<Edge | null>(null);
-
-  // Load projects
-  useEffect(() => {
-    projectApi.list().then((ps) => {
-      setProjects(ps);
-      if (ps.length > 0 && !projectId) setProjectId(ps[0].id);
-    });
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, []);
+  const [detailTaskId, setDetailTaskId] = useState<number | null>(null);
+  const [detailOpen, setDetailOpen] = useState(false);
 
   const loadGraph = useCallback(async (pid: number) => {
     setLoading(true);
@@ -182,7 +178,7 @@ export default function DagCanvas() {
   // Connect: add dependency (drag from source(bottom) to target(top))
   const onConnect = useCallback(
     async (conn: Connection) => {
-      if (!conn.source || !conn.target || !projectId) return;
+      if (!conn.source || !conn.target) return;
       try {
         await dagApi.addDependency({
           task_id: Number(conn.target),
@@ -205,9 +201,15 @@ export default function DagCanvas() {
         message.error(e.response?.data?.detail || '添加依赖失败');
       }
     },
-    [projectId, setEdges]
+    [setEdges]
   );
 
+  // Node click -> open task detail modal
+  const onNodeClick = useCallback((_: unknown, node: Node) => {
+    setDetailTaskId(Number(node.id));
+    setDetailOpen(true);
+  }, []);
+
   // Delete selected edge
   const removeSelectedEdge = useCallback(async () => {
     if (!selectedEdge) return;
@@ -269,70 +271,73 @@ export default function DagCanvas() {
 
   return (
     <div>
-      <Card
-        title="DAG 编排画布"
-        extra={
-          <Space>
-            <Select
-              style={{ width: 220 }}
-              placeholder="选择项目"
-              value={projectId}
-              onChange={setProjectId}
-              options={projects.map((p) => ({ label: p.name, value: p.id }))}
-            />
-            <Tooltip title="刷新">
-              <Button icon={<ReloadOutlined />} onClick={() => projectId && loadGraph(projectId)} loading={loading} />
-            </Tooltip>
-            <Tooltip title={selectedEdge ? '删除选中的依赖连线' : '先点击选中一条连线'}>
-              <Button
-                danger
-                icon={<DeleteOutlined />}
-                disabled={!selectedEdge}
-                onClick={removeSelectedEdge}
-              >
-                删除依赖
-              </Button>
-            </Tooltip>
-            <Button
-              type="primary"
-              icon={<ThunderboltOutlined />}
-              onClick={executeAll}
-              loading={executing}
-              disabled={nodes.length === 0}
-            >
-              执行 DAG
-            </Button>
-          </Space>
-        }
+      <div
+        style={{
+          display: 'flex',
+          justifyContent: 'space-between',
+          alignItems: 'center',
+          marginBottom: 8,
+        }}
       >
-        <div style={{ marginBottom: 8 }}>
-          <Text type="secondary" style={{ fontSize: 12 }}>
-            操作说明：从节点底部拖拽到另一节点顶部可建立依赖（上游 → 下游）；点击连线可选中并删除；支持拖拽移动节点、缩放画布。
-          </Text>
-        </div>
-        <div style={{ height: 'calc(100vh - 260px)', minHeight: 480, border: '1px solid #f0f0f0', borderRadius: 8 }}>
-          {nodes.length === 0 && !loading ? (
-            <Empty description="该项目暂无任务，请先在任务管理中创建任务" style={{ marginTop: 120 }} />
-          ) : (
-            <ReactFlow
-              nodes={nodes}
-              edges={edges}
-              onNodesChange={onNodesChange}
-              onEdgesChange={onEdgesChange}
-              onConnect={onConnect}
-              onEdgeClick={(_, edge) => setSelectedEdge(edge)}
-              onPaneClick={() => setSelectedEdge(null)}
-              nodeTypes={nodeTypes}
-              fitView
-              deleteKeyCode={[]}
+        <Text type="secondary" style={{ fontSize: 12 }}>
+          拖拽节点底部锚点到另一节点顶部建立依赖；点击节点查看详情；点击连线可选中删除。
+        </Text>
+        <Space>
+          <Tooltip title="刷新">
+            <Button size="small" icon={<ReloadOutlined />} onClick={() => loadGraph(projectId)} loading={loading} />
+          </Tooltip>
+          <Tooltip title={selectedEdge ? '删除选中的依赖连线' : '先点击选中一条连线'}>
+            <Button
+              size="small"
+              danger
+              icon={<DeleteOutlined />}
+              disabled={!selectedEdge}
+              onClick={removeSelectedEdge}
             >
-              <Background gap={16} />
-              <Controls />
-              {minimap}
-            </ReactFlow>
-          )}
-        </div>
-      </Card>
+              删除依赖
+            </Button>
+          </Tooltip>
+          <Button
+            size="small"
+            type="primary"
+            icon={<ThunderboltOutlined />}
+            onClick={executeAll}
+            loading={executing}
+            disabled={nodes.length === 0}
+          >
+            执行 DAG
+          </Button>
+        </Space>
+      </div>
+      <div style={{ height: 560, border: '1px solid #f0f0f0', borderRadius: 8 }}>
+        {nodes.length === 0 && !loading ? (
+          <Empty description="该项目暂无任务，请先在任务管理中创建任务" style={{ marginTop: 160 }} />
+        ) : (
+          <ReactFlow
+            nodes={nodes}
+            edges={edges}
+            onNodesChange={onNodesChange}
+            onEdgesChange={onEdgesChange}
+            onConnect={onConnect}
+            onNodeClick={onNodeClick}
+            onEdgeClick={(_, edge) => setSelectedEdge(edge)}
+            onPaneClick={() => setSelectedEdge(null)}
+            nodeTypes={nodeTypes}
+            fitView
+            deleteKeyCode={[]}
+          >
+            <Background gap={16} />
+            <Controls />
+            {minimap}
+          </ReactFlow>
+        )}
+      </div>
+
+      <TaskDetailModal
+        taskId={detailTaskId}
+        open={detailOpen}
+        onClose={() => setDetailOpen(false)}
+      />
     </div>
   );
 }