diff --git a/framework/framework/base.ts b/framework/framework/base.ts
index 70ed7373c..a70f62574 100644
--- a/framework/framework/base.ts
+++ b/framework/framework/base.ts
@@ -84,6 +84,7 @@ export default (logger, xff, xhost) => async (ctx: KoaContext, next: Next) => {
                         const inject = request.headers['x-hydro-inject'].toString().toLowerCase().split(',').map((i) => i.trim());
                         if (inject.includes('pagename')) {
                             ctx.set('x-hydro-page', ctx._matchedRouteName || '');
+                            ctx.set('x-hydro-template', response.template || '');
                         }
                         if (response.body !== null && typeof response.body === 'object') {
                             if (inject.includes('uicontext')) response.body.UiContext = UiContext;
diff --git a/packages/ui-next/index.ts b/packages/ui-next/index.ts
index 08f229873..adf49f41f 100644
--- a/packages/ui-next/index.ts
+++ b/packages/ui-next/index.ts
@@ -191,6 +191,7 @@ export async function apply(ctx: Context) {
                 const serialized = JSON.stringify({
                     HYDRO_INJECTED: true,
                     name: context.handler.context._matchedRouteName,
+                    template: context.handler.response.template || '',
                     args: {
                         UserContext: context.UserContext,
                         UiContext: context.handler.UiContext,
@@ -224,6 +225,7 @@ export async function apply(ctx: Context) {
                 const serialized = JSON.stringify({
                     HYDRO_INJECTED: true,
                     name: context.handler.context._matchedRouteName,
+                    template: context.handler.response.template || '',
                     args: {
                         UserContext: context.UserContext,
                         UiContext: context.handler.UiContext,
diff --git a/packages/ui-next/src/app.tsx b/packages/ui-next/src/app.tsx
index 6f2f65376..5fdb3f7dc 100644
--- a/packages/ui-next/src/app.tsx
+++ b/packages/ui-next/src/app.tsx
@@ -1,12 +1,36 @@
 import { Suspense, useMemo, useSyncExternalStore } from 'react';
+import DefaultLayout from './components/layout';
 import { usePageData } from './context/page-data';
-import { defineSlot, SlotName } from './registry';
+import { defineSlot } from './registry';
 import { SlotErrorBoundary } from './registry/error-boundary';
 import { store } from './registry/store';
 
 const App = defineSlot('app:root', () => {
-  const { name } = usePageData();
-  const slotName: SlotName = `page:${name}`;
+  const { name, template, args } = usePageData();
+
+  const isError = !!(args as Record<string, unknown>).error;
+
+  const [slotName, entry] = useMemo(() => {
+    if (isError) {
+      return ['page:error', store.getDefault('page:error')] as const;
+    }
+    const templateName = typeof template === 'string' ? template.replace(/\.html$/, '') : null;
+    if (templateName) {
+      const templateSlot = `page:${templateName}` as `page:${string}`;
+      const templateEntry = store.getDefault(templateSlot);
+      if (templateEntry) {
+        if (import.meta.env.DEV) {
+          console.log(`[ui-next] using template "${templateName}" for page "${name}"`);
+        }
+        return [templateSlot, templateEntry] as const;
+      }
+    }
+    const slot = `page:${name}` as `page:${string}`;
+    if (import.meta.env.DEV) {
+      console.log(`[ui-next] using page slot "${slot}"`);
+    }
+    return [slot, store.getDefault(slot)] as const;
+  }, [name, template, isError]);
 
   const [subscribe, getSnapshot] = useMemo(() => [
     (cb: () => void) => store.subscribe(slotName, cb),
@@ -15,9 +39,7 @@ const App = defineSlot('app:root', () => {
 
   useSyncExternalStore(subscribe, getSnapshot);
 
-  const Comp = store.getDefault(slotName);
-
-  if (!Comp) {
+  if (!entry) {
     return (
       <div>
         Page not found: <code>{name}</code>
@@ -25,10 +47,17 @@ const App = defineSlot('app:root', () => {
     );
   }
 
+  const Layout = store.getDefault(`layout:${entry.layout}`) ?? DefaultLayout;
+  const { Page } = entry;
+
   return (
     <SlotErrorBoundary slotName={slotName} label="renderer">
-      <Suspense fallback={<div>Loading...</div>}>
-        <Comp />
+      <Suspense fallback={null}>
+        <Layout>
+          <Suspense fallback={<div>Loading...</div>}>
+            <Page />
+          </Suspense>
+        </Layout>
       </Suspense>
     </SlotErrorBoundary>
   );
diff --git a/packages/ui-next/src/components/layout.tsx b/packages/ui-next/src/components/layout.tsx
index f3044a719..6700092dc 100644
--- a/packages/ui-next/src/components/layout.tsx
+++ b/packages/ui-next/src/components/layout.tsx
@@ -1,5 +1,8 @@
 import { defineSlot } from '../registry';
 
-const Layout = defineSlot('app:layout', ({ children }: React.PropsWithChildren) => <>{children}</>);
+const Layout = defineSlot('layout:default', ({ children }: React.PropsWithChildren) => {
+  console.log('[ui-next] using default layout');
+  return <>{children}</>;
+});
 
 export default Layout;
diff --git a/packages/ui-next/src/context/page-data.tsx b/packages/ui-next/src/context/page-data.tsx
index 389214096..7f358e49a 100644
--- a/packages/ui-next/src/context/page-data.tsx
+++ b/packages/ui-next/src/context/page-data.tsx
@@ -4,6 +4,7 @@ import { createContext, type ReactNode, useContext, useMemo, useState } from 're
 
 export interface PageData {
   name: string;
+  template: string;
   args: {
     UserContext: Record<string, any>;
     UiContext: Record<string, any>;
diff --git a/packages/ui-next/src/context/router.tsx b/packages/ui-next/src/context/router.tsx
index 5253552f2..f8f50aa71 100644
--- a/packages/ui-next/src/context/router.tsx
+++ b/packages/ui-next/src/context/router.tsx
@@ -84,6 +84,7 @@ export const RouterProvider: React.FC<React.PropsWithChildren> = ({ children })
           if (!res.ok) throw new Error(`Navigation failed: ${res.status} ${res.statusText}`);
           const body = await res.json();
           const pageName = res.headers.get('x-hydro-page') || '';
+          const template = res.headers.get('x-hydro-template') || '';
           console.log('[Hydro] data from', reqUrl, 'received:', body, 'pageName:', pageName);
 
           if (gen !== genRef.current) return false;
@@ -95,6 +96,7 @@ export const RouterProvider: React.FC<React.PropsWithChildren> = ({ children })
             ...prev,
             args: body,
             name: pageName,
+            template,
             url,
           }));
           dispatch({ type: 'FETCH_SUCCESS' });
diff --git a/packages/ui-next/src/globals.ts b/packages/ui-next/src/globals.ts
index 32161837f..2dc3ce440 100644
--- a/packages/ui-next/src/globals.ts
+++ b/packages/ui-next/src/globals.ts
@@ -64,6 +64,7 @@ export const endpointOrigins = new Set(endpoints.map((ep) => new URL(ep).origin)
 
 export const initialPage: PageData = {
   name: (injectionData.name as string) || '',
+  template: (injectionData.template as string) || '',
   args: (injectionData.args as any) || {},
   url: (injectionData.url as string) || (window.location.pathname + window.location.search),
 };
diff --git a/packages/ui-next/src/pages/homepage.tsx b/packages/ui-next/src/pages/homepage.tsx
index 6282ca7f4..a31550ff1 100644
--- a/packages/ui-next/src/pages/homepage.tsx
+++ b/packages/ui-next/src/pages/homepage.tsx
@@ -8,12 +8,3 @@ export default function Homepage() {
     </div>
   );
 }
-
-export function Layout({ children }: React.PropsWithChildren) {
-  return (
-    <div>
-      {children}
-      <div>layout test</div>
-    </div>
-  );
-}
diff --git a/packages/ui-next/src/registry/index.ts b/packages/ui-next/src/registry/index.ts
index 30ec23551..1f0cbb239 100644
--- a/packages/ui-next/src/registry/index.ts
+++ b/packages/ui-next/src/registry/index.ts
@@ -1,7 +1,12 @@
 export { SlotErrorBoundary } from './error-boundary';
 export { after, before, intercept, patch, replace, wrap } from './interceptors';
+export { registerLayout } from './layout';
+export type { LayoutComponent } from './layout';
 export { registerPage } from './page';
 export { installPlugin } from './plugin';
 export type { PluginAPI, PluginDefinition } from './plugin';
 export { defineSlot } from './slot';
-export type { Interceptor, InterceptorEntry, InterceptorOptions, SlotName } from './types';
+export type {
+  AppSlotName, ComponentSlotName, Interceptor, InterceptorEntry, InterceptorOptions,
+  LayoutSlotName, PageEntry, PageSlotName, RegisterPageOptions, SlotName, SlotValue,
+} from './types';
diff --git a/packages/ui-next/src/registry/layout.ts b/packages/ui-next/src/registry/layout.ts
new file mode 100644
index 000000000..e5c1ae831
--- /dev/null
+++ b/packages/ui-next/src/registry/layout.ts
@@ -0,0 +1,7 @@
+import { store } from './store';
+
+export type LayoutComponent = React.ComponentType<React.PropsWithChildren>;
+
+export function registerLayout(name: string, Comp: LayoutComponent) {
+  store.setDefault(`layout:${name}` as `layout:${string}`, Comp);
+}
diff --git a/packages/ui-next/src/registry/page.tsx b/packages/ui-next/src/registry/page.tsx
index bf4f87c00..a67767ed0 100644
--- a/packages/ui-next/src/registry/page.tsx
+++ b/packages/ui-next/src/registry/page.tsx
@@ -1,28 +1,13 @@
-import React, { lazy } from 'react';
-import Layout from '../components/layout';
+import { lazy } from 'react';
 import { store } from './store';
+import type { PageEntry, PageLoader, PageSlotName, RegisterPageOptions } from './types';
 
-interface PageModule<P = any> {
-  default: React.ComponentType<P>;
-  Layout?: React.ComponentType<React.PropsWithChildren>;
-}
-
-type PageLoader<P = any> = () => Promise<PageModule<P>>;
-
-export function registerPage<P = any>(name: string, loader: PageLoader<P>) {
-  store.setDefault(`page:${name}`, lazy(() =>
-    loader().then((mod) => {
-      const PageComp = mod.default;
-      const LayoutComp = mod.Layout || Layout;
-      return {
-        default(props: React.PropsWithChildren<P>) {
-          return (
-            <LayoutComp>
-              <PageComp {...props} />
-            </LayoutComp>
-          );
-        },
-      };
-    }),
-  ));
+export function registerPage<P = any>(
+  name: string,
+  loader: PageLoader<P>,
+  options: RegisterPageOptions = {},
+) {
+  const Page = lazy(loader);
+  const entry: PageEntry<P> = { Page, layout: options.layout ?? 'default' };
+  store.setDefault(`page:${name}` as PageSlotName, entry);
 }
diff --git a/packages/ui-next/src/registry/plugin.ts b/packages/ui-next/src/registry/plugin.ts
index dc63f94ff..cdf275060 100644
--- a/packages/ui-next/src/registry/plugin.ts
+++ b/packages/ui-next/src/registry/plugin.ts
@@ -1,4 +1,5 @@
 import { after, before, intercept, patch, replace, wrap } from './interceptors';
+import { registerLayout } from './layout';
 import { registerPage } from './page';
 
 export interface PluginAPI {
@@ -9,10 +10,14 @@ export interface PluginAPI {
   replace: typeof replace;
   wrap: typeof wrap;
   registerPage: typeof registerPage;
+  registerLayout: typeof registerLayout;
 }
 
 export function createPluginAPI(): PluginAPI {
-  return { intercept, before, after, patch, replace, wrap, registerPage };
+  return {
+    intercept, before, after, patch, replace, wrap,
+    registerPage, registerLayout,
+  };
 }
 
 export interface PluginDefinition {
diff --git a/packages/ui-next/src/registry/slot.tsx b/packages/ui-next/src/registry/slot.tsx
index 20cc6dbbb..768b8696c 100644
--- a/packages/ui-next/src/registry/slot.tsx
+++ b/packages/ui-next/src/registry/slot.tsx
@@ -30,7 +30,7 @@ function buildChain<P extends Record<string, any>>(
   return pipeline;
 }
 
-export function defineSlot<P extends Record<string, any>>(
+export function defineSlot<P extends React.ComponentProps<any>>(
   name: SlotName,
   DefaultComp: React.FC<P>,
 ): React.FC<P> {
diff --git a/packages/ui-next/src/registry/store.ts b/packages/ui-next/src/registry/store.ts
index 93ef08f77..4a55748b2 100644
--- a/packages/ui-next/src/registry/store.ts
+++ b/packages/ui-next/src/registry/store.ts
@@ -1,10 +1,10 @@
-import type { InterceptorEntry, InterceptorOptions, SlotName } from './types';
+import type { InterceptorEntry, InterceptorOptions, SlotName, SlotValue } from './types';
 
 type Listener = () => void;
 
 interface RegistryState {
   interceptors: Record<string, InterceptorEntry[]>;
-  defaults: Record<string, React.FC<any>>;
+  defaults: Record<string, unknown>;
 }
 
 function createRegistryStore() {
@@ -72,13 +72,13 @@ function createRegistryStore() {
     return state.interceptors[name] ?? [];
   }
 
-  function setDefault(name: SlotName, comp: React.FC<any>) {
-    state.defaults[name] = comp;
+  function setDefault<N extends SlotName>(name: N, value: SlotValue<N>) {
+    state.defaults[name] = value;
     bumpVersion(name);
   }
 
-  function getDefault(name: SlotName): React.FC<any> | undefined {
-    return state.defaults[name];
+  function getDefault<N extends SlotName>(name: N): SlotValue<N> | undefined {
+    return state.defaults[name] as SlotValue<N> | undefined;
   }
 
   return {
diff --git a/packages/ui-next/src/registry/types.ts b/packages/ui-next/src/registry/types.ts
index 5e71c8a85..6e7bb8825 100644
--- a/packages/ui-next/src/registry/types.ts
+++ b/packages/ui-next/src/registry/types.ts
@@ -1,17 +1,44 @@
-type Scope = 'app' | 'page' | 'component' | string;
+import type { LayoutComponent } from './layout';
+
+type AppScope = 'app';
+type PageScope = 'page';
+type LayoutScope = 'layout';
+type ComponentScope = 'component';
+type Scope = AppScope | PageScope | LayoutScope | ComponentScope | string;
+
+export interface PageModule<P = any> {
+  default: React.ComponentType<P>;
+}
+export type PageLoader<P = any> = () => Promise<PageModule<P>>;
+export interface PageEntry<P = any> {
+  Page: React.LazyExoticComponent<React.ComponentType<P>>;
+  layout: string;
+}
+export interface RegisterPageOptions {
+  /** Layout key registered via `registerLayout`. Defaults to `default`. */
+  layout?: string;
+}
+
+export type AppSlotName = `${AppScope}:${string}`;
+export type PageSlotName = `${PageScope}:${string}`;
+export type LayoutSlotName = `${LayoutScope}:${string}`;
+export type ComponentSlotName = `${ComponentScope}:${string}`;
 export type SlotName = `${Scope}:${string}`;
+export type SlotValue<N extends SlotName> =
+  N extends PageSlotName ? PageEntry
+    : N extends LayoutSlotName ? LayoutComponent
+      : N extends ComponentSlotName ? React.FC<any>
+        : React.FC<any>;
 
 export type Interceptor<P = any> = (
   props: P,
   next: (overrideProps?: Partial<P>) => React.ReactNode,
 ) => React.ReactNode;
-
 export interface InterceptorOptions {
   id?: string;
   /** 越小越靠外，越先执行 */
   priority?: number;
 }
-
 export interface InterceptorEntry<P = any> {
   id: string;
   /** 越小越靠外，越先执行 */