diff --git a/web/src/views/Workflow/constant.ts b/web/src/views/Workflow/constant.ts
index 50b92696..06eb4d99 100644
--- a/web/src/views/Workflow/constant.ts
+++ b/web/src/views/Workflow/constant.ts
@@ -2,7 +2,7 @@
  * @Author: ZhaoYing 
  * @Date: 2026-02-03 15:06:18 
  * @Last Modified by: ZhaoYing
- * @Last Modified time: 2026-03-30 15:11:56
+ * @Last Modified time: 2026-03-30 16:52:54
  */
 import LoopNode from './components/Nodes/LoopNode';
 import NormalNode from './components/Nodes/NormalNode';
@@ -695,8 +695,59 @@ export const portArgs = { x: nodeWidth, y: portItemArgsY }
 
 const defaultPortGroup = {
   position: { name: 'absolute' },
-  markup: portMarkup,
-  attrs: portAttrs
+  markup: [
+    { tagName: 'rect', selector: 'body' },
+    { tagName: 'circle', selector: 'hoverBody' },
+    { tagName: 'text', selector: 'label' },
+  ],
+  attrs: {
+    body: {
+      width: 1,
+      height: 8,
+      x: -1,
+      magnet: true,
+      stroke: port_color,
+      strokeWidth: edge_width,
+      fill: port_color,
+    },
+    hoverBody: {
+      r: 6,
+      cy: 2,
+      magnet: true,
+      stroke: port_color,
+      strokeWidth: edge_width,
+      fill: port_color,
+      opacity: 0,
+    },
+    label: {
+      text: '+',
+      fontSize: 12,
+      fontWeight: 'bold',
+      fill: '#FFFFFF',
+      textAnchor: 'middle',
+      textVerticalAnchor: 'middle',
+      pointerEvents: 'none',
+      y: '0.15em',
+      opacity: 0,
+    },
+  },
+}
+
+const leftPortGroup = {
+  position: { name: 'absolute' },
+  markup: [{ tagName: 'rect', selector: 'body' }],
+  attrs: {
+    body: {
+      width: 1,
+      height: 8,
+      x: -1,
+      y: -4,
+      magnet: true,
+      stroke: port_color,
+      strokeWidth: edge_width,
+      fill: port_color,
+    },
+  },
 }
 
 /**
@@ -705,7 +756,7 @@ const defaultPortGroup = {
  */
 export const defaultAbsolutePortGroups = {
   right: defaultPortGroup,
-  left: defaultPortGroup,
+  left: leftPortGroup,
 }
 /**
  * Default port items for standard nodes
@@ -799,7 +850,7 @@ export const graphNodeLibrary: Record<string, NodeConfig> = {
     height: 28,
     shape: 'add-node',
     ports: {
-      groups: { left: defaultPortGroup },
+      groups: { left: leftPortGroup },
       items: [{ group: 'left', args: { x: 0, y: 18 }}],
     },
   },
@@ -826,7 +877,7 @@ export const graphNodeLibrary: Record<string, NodeConfig> = {
     height: 28,
     shape: 'add-node',
     ports: {
-      groups: { left: defaultPortGroup },
+      groups: { left: leftPortGroup },
       items: [{ group: 'left', args: { x: 0, y: 14 } }],
     },
   },
@@ -835,7 +886,7 @@ export const graphNodeLibrary: Record<string, NodeConfig> = {
     height: 76,
     shape: 'normal-node',
     ports: {
-      groups: { left: defaultPortGroup },
+      groups: { left: leftPortGroup },
       items: [defaultPortItems[0]],
     },
   },
diff --git a/web/src/views/Workflow/hooks/useWorkflowGraph.ts b/web/src/views/Workflow/hooks/useWorkflowGraph.ts
index 4059c264..dd6f6eb7 100644
--- a/web/src/views/Workflow/hooks/useWorkflowGraph.ts
+++ b/web/src/views/Workflow/hooks/useWorkflowGraph.ts
@@ -2,7 +2,7 @@
  * @Author: ZhaoYing 
  * @Date: 2026-02-03 15:17:48 
  * @Last Modified by: ZhaoYing
- * @Last Modified time: 2026-03-30 15:08:14
+ * @Last Modified time: 2026-03-30 17:18:11
  */
 import { useRef, useEffect, useState } from 'react';
 import { useParams } from 'react-router-dom';
@@ -441,6 +441,7 @@ export const useWorkflowGraph = ({
       setTimeout(() => {
         if (graphRef.current) {
           graphRef.current.centerContent()
+          graphRef.current.getNodes().forEach(node => node.toFront());
         }
       }, 200)
     }
@@ -719,6 +720,7 @@ export const useWorkflowGraph = ({
   };
   const nodePortClickEvent = ({ e, node, port }: { e: MouseEvent, node: Node, port: string }) => {
     e.stopPropagation();
+    e.preventDefault();
     const portElement = e.target as HTMLElement;
     const rect = portElement.getBoundingClientRect();
 
@@ -903,13 +905,65 @@ export const useWorkflowGraph = ({
     graphRef.current.on('edge:click', edgeClick);
     // Listen to port click event
     graphRef.current.on('node:port:click', nodePortClickEvent);
+    // Port hover: show circle style on right ports
+    graphRef.current.on('node:port:mouseenter', ({ node, port }) => {
+      if (!port) return;
+      const portData = node.getPort(port);
+      if (portData?.group !== 'right') return;
+      node.toFront();
+      node.setPortProp(port, 'attrs/body/opacity', 0);
+      node.setPortProp(port, 'attrs/hoverBody/opacity', 1);
+      node.setPortProp(port, 'attrs/label/opacity', 1);
+    });
+    graphRef.current.on('node:port:mouseleave', ({ node, port }) => {
+      if (!port) return;
+      const portData = node.getPort(port);
+      if (portData?.group !== 'right') return;
+      node.setPortProp(port, 'attrs/body/opacity', 1);
+      node.setPortProp(port, 'attrs/hoverBody/opacity', 0);
+      node.setPortProp(port, 'attrs/label/opacity', 0);
+    });
     // Listen to canvas click event, cancel selection
     graphRef.current.on('blank:click', blankClick);
+    // Node hover: highlight connected edges
+    graphRef.current.on('node:mouseenter', ({ node }) => {
+      graphRef.current?.getEdges().forEach(edge => {
+        const view = graphRef.current?.findViewByCell(edge);
+        view?.removeTools();
+        if (edge.getAttrByPath('line/stroke') !== edge_selected_color) {
+          edge.setAttrByPath('line/stroke', edge_color);
+        }
+      });
+      graphRef.current?.getConnectedEdges(node).forEach(edge => {
+        edge.setAttrByPath('line/stroke', edge_hover_color);
+      });
+      node.getPorts().filter(p => p.group === 'right').forEach(p => {
+        node.setPortProp(p.id!, 'attrs/body/opacity', 0);
+        node.setPortProp(p.id!, 'attrs/hoverBody/opacity', 1);
+        node.setPortProp(p.id!, 'attrs/label/opacity', 1);
+      });
+    });
+    graphRef.current.on('node:mouseleave', ({ node }) => {
+      graphRef.current?.getConnectedEdges(node).forEach(edge => {
+        if (edge.getAttrByPath('line/stroke') !== edge_selected_color) {
+          edge.setAttrByPath('line/stroke', edge_color);
+        }
+      });
+      node.getPorts().filter(p => p.group === 'right').forEach(p => {
+        node.setPortProp(p.id!, 'attrs/body/opacity', 1);
+        node.setPortProp(p.id!, 'attrs/hoverBody/opacity', 0);
+        node.setPortProp(p.id!, 'attrs/label/opacity', 0);
+      });
+    });
     // Listen to zoom event
     graphRef.current.on('scale', scaleEvent);
     // Listen to node move event
     graphRef.current.on('node:moved', nodeMoved);
     graphRef.current.on('node:removed', blankClick)
+    // When edge changes, bring connected nodes' ports to front
+    graphRef.current.on('edge:change', () => {
+      graphRef.current?.getNodes().forEach(node => node.toFront());
+    });
     // Listen to copy keyboard event
     graphRef.current.bindKey(['ctrl+c', 'cmd+c'], copyEvent);
     // Listen to paste keyboard event