diff --git a/vue/src/system/GraphDemo.vue b/vue/src/system/GraphDemo.vue
index eb0c6c4..824a6ed 100644
--- a/vue/src/system/GraphDemo.vue
+++ b/vue/src/system/GraphDemo.vue
@@ -597,13 +597,13 @@ export default {
               labelText: (d) => d.data.relationship.properties.label,
               stroke: (d) => {
                 // 获取 target 节点的 label
-                const targetLabel = this._nodeLabelMap.get(d.target); // d.target 是目标节点 ID
+                const targetLabel = this._nodeLabelMap.get(d.source); // d.target 是目标节点 ID
                 // 根据 target 节点类型返回对应浅色
                 if (targetLabel === 'Disease') return 'rgba(239,68,68,0.5)';
                 if (targetLabel === 'Drug') return 'rgba(145,204,117,0.5)';
                 if (targetLabel === 'Symptom') return 'rgba(250,200,88,0.5)';
-                if (targetLabel === 'Check') return 'rgba(89,209,212,0.5)';   // 橙
-                return 'rgba(51,110,238,0.5)'; // default
+                if (targetLabel === 'Check') return 'rgba(51,110,238,0.5)';   // 橙
+                return 'rgba(89,209,212,0.5)'; // default
               },
               // labelFill: (d) => {
               //   // 获取 target 节点的 label