diff --git a/site-dumi-plugin.ts b/site-dumi-plugin.ts
index c6e347b6db7d..0b6ac39e37a7 100644
--- a/site-dumi-plugin.ts
+++ b/site-dumi-plugin.ts
@@ -15,6 +15,12 @@ export default function siteDumiPlugin(api: IApi) {
           'site/theme/markdownExternalLink.less',
         ),
       },
+      {
+        source: path.join(
+          api.paths.cwd,
+          'site/theme/antTaskListSimpleSiteDefaults.less',
+        ),
+      },
     ];
   });
 }
diff --git a/site/theme/antTaskListSimpleSiteDefaults.less b/site/theme/antTaskListSimpleSiteDefaults.less
new file mode 100644
index 000000000000..a4452047138b
--- /dev/null
+++ b/site/theme/antTaskListSimpleSiteDefaults.less
@@ -0,0 +1,10 @@
+// 文档/演示中嵌入的 Agentic 任务列表：站点侧默认与组件库一致
+.ant-task-list-simple {
+  padding: 0 4px;
+}
+
+.ant-task-list-simple.ant-task-list-simple-collapsed .ant-task-list-simple-content,
+.ant-task-list-simple .ant-task-list-simple-content.ant-task-list-simple-content-collapsed {
+  height: 0;
+  overflow: hidden;
+}