diff --git a/shared-route-config.ts b/shared-route-config.ts
index c4d10321d..dacbc3eef 100644
--- a/shared-route-config.ts
+++ b/shared-route-config.ts
@@ -20,6 +20,8 @@ export type SubsiteConfig = {
     light: string;
     dark: string;
   };
+  /** When set, the subsite links to an external URL instead of an internal route. */
+  external?: string;
 };
 
 export const SUBSITES_CONFIG: SubsiteConfig[] = [
@@ -74,6 +76,45 @@ export const SUBSITES_CONFIG: SubsiteConfig[] = [
       dark: '/assets/lynxai-logo-dark.svg',
     },
   },
+  {
+    value: 'sparkling',
+    label: 'Sparkling',
+    description: 'Lynx at TikTok scale',
+    descriptionZh: 'TikTok 规模的 Lynx 基础设施',
+    external: 'https://tiktok.github.io/sparkling',
+    home: '',
+    url: '',
+    logo: {
+      light: 'https://tiktok.github.io/sparkling/sparkling_logo_144_light.png',
+      dark: 'https://tiktok.github.io/sparkling/sparkling_logo_144.png',
+    },
+  },
+  {
+    value: 'vue-lynx',
+    label: 'Vue Lynx',
+    description: 'Build Lynx apps with Vue',
+    descriptionZh: '用 Vue 开发 Lynx 应用',
+    external: 'https://vue.lynxjs.org',
+    home: '',
+    url: '',
+    logo: {
+      light: 'https://vuejs.org/logo.svg',
+      dark: 'https://vuejs.org/logo.svg',
+    },
+  },
+  {
+    value: 'reactlynx-use',
+    label: 'ReactLynx Use',
+    description: 'Hooks for ReactLynx',
+    descriptionZh: 'ReactLynx 的 Hooks 库',
+    external: 'https://hooks.lynxjs.org',
+    home: '',
+    url: '',
+    logo: {
+      light: 'https://lf-lynx.tiktok-cdns.com/obj/lynx-artifacts-oss-sg/lynx-website/assets/reactlynx-logo-light.svg',
+      dark: 'https://lf-lynx.tiktok-cdns.com/obj/lynx-artifacts-oss-sg/lynx-website/assets/reactlynx-logo-dark.svg',
+    },
+  },
 ];
 
 /**
@@ -81,9 +122,9 @@ export const SUBSITES_CONFIG: SubsiteConfig[] = [
  * For example, "start/quick-start" will be accessible at both
  * "guide/start/quick-start" and "react/start/quick-start".
  */
-export const SHARED_SIDEBAR_PATHS = SUBSITES_CONFIG.map(
-  (config) => config.value,
-);
+export const SHARED_SIDEBAR_PATHS = SUBSITES_CONFIG.filter(
+  (config) => !config.external,
+).map((config) => config.value);
 
 const SHARED_DOC_ROOT = 'start';
 
diff --git a/theme/AfterNavTitle.tsx b/theme/AfterNavTitle.tsx
index b4010962a..18ddfa18d 100644
--- a/theme/AfterNavTitle.tsx
+++ b/theme/AfterNavTitle.tsx
@@ -1,9 +1,10 @@
 import { Drawer, DrawerContent, DrawerTrigger } from '@/components/ui/drawer';
-import { ChevronDown } from 'lucide-react';
+import { ArrowUpRight, ChevronDown } from 'lucide-react';
 import { forwardRef, useEffect, useState } from 'react';
 import { useLang, useLocation, useNavigate } from '@rspress/core/runtime';
 import { Link } from '@rspress/core/theme-original';
 import { SUBSITES_CONFIG, getLangPrefix } from '@site/shared-route-config';
+import { Separator } from '@/components/ui/separator';
 import { SubsiteLogo, SubsiteView } from './subsite-ui';
 import { VersionIndicator } from './VersionIndicator';
 
@@ -13,6 +14,49 @@ import {
   DropdownMenuTrigger,
 } from '@/components/ui/dropdown-menu';
 
+const internalSubsites = SUBSITES_CONFIG.filter((s) => !s.external);
+const externalSubsites = SUBSITES_CONFIG.filter((s) => s.external);
+
+function SubsiteItem({
+  subsite,
+  onClick,
+  size,
+  showArrow,
+}: {
+  subsite: (typeof SUBSITES_CONFIG)[0];
+  onClick: () => void;
+  size: 'default' | 'large' | 'minimal';
+  showArrow?: boolean;
+}) {
+  const lang = useLang();
+  return (
+    <div
+      className="cursor-pointer hover:bg-accent rounded-md p-2 flex items-center justify-between"
+      onClick={onClick}
+      onKeyDown={(e) => {
+        if (e.key === 'Enter' || e.key === ' ') onClick();
+      }}
+      role="button"
+      tabIndex={0}
+    >
+      <SubsiteView subsite={subsite} lang={lang} size={size} />
+      {showArrow && (
+        <ArrowUpRight className="h-3.5 w-3.5 text-muted-foreground shrink-0" strokeWidth={1.5} />
+      )}
+    </div>
+  );
+}
+
+function SectionHeader({ children }: { children: React.ReactNode }) {
+  return (
+    <div className="px-2 pt-2 pb-1">
+      <span className="text-[11px] font-medium text-muted-foreground uppercase tracking-wide">
+        {children}
+      </span>
+    </div>
+  );
+}
+
 function NavContent({
   onSelect,
   isDrawer,
@@ -24,32 +68,73 @@ function NavContent({
   const lang = useLang();
 
   const handleSubsiteClick = (subsite: (typeof SUBSITES_CONFIG)[0]) => {
-    navigate(`${getLangPrefix(lang)}${subsite.home}`);
+    if (subsite.external) {
+      window.open(subsite.external, '_blank');
+    } else {
+      navigate(`${getLangPrefix(lang)}${subsite.home}`);
+    }
     onSelect();
   };
 
-  return (
-    <div className="flex flex-col gap-2 p-1">
-      {SUBSITES_CONFIG.map((subsite) => (
-        <div
-          key={subsite.value}
-          className="cursor-pointer hover:bg-accent rounded-md p-2"
-          onClick={() => handleSubsiteClick(subsite)}
-          onKeyDown={(e) => {
-            if (e.key === 'Enter' || e.key === ' ') {
-              handleSubsiteClick(subsite);
-            }
-          }}
-          role="button"
-          tabIndex={0}
-        >
-          <SubsiteView
+  if (isDrawer) {
+    return (
+      <div className="flex flex-col gap-2 p-1">
+        {internalSubsites.map((subsite) => (
+          <SubsiteItem
+            key={subsite.value}
             subsite={subsite}
-            lang={lang}
-            size={isDrawer ? 'large' : 'default'}
+            onClick={() => handleSubsiteClick(subsite)}
+            size="large"
           />
+        ))}
+        {externalSubsites.length > 0 && (
+          <>
+            <Separator />
+            <SectionHeader>Ecosystem</SectionHeader>
+            {externalSubsites.map((subsite) => (
+              <SubsiteItem
+                key={subsite.value}
+                subsite={subsite}
+                onClick={() => handleSubsiteClick(subsite)}
+                size="large"
+                showArrow
+              />
+            ))}
+          </>
+        )}
+      </div>
+    );
+  }
+
+  return (
+    <div className="grid grid-cols-2 divide-x divide-border">
+      <div className="px-3 pt-0 pb-3">
+        <SectionHeader>Core</SectionHeader>
+        <div className="flex flex-col gap-1 pt-1">
+          {internalSubsites.map((subsite) => (
+            <SubsiteItem
+              key={subsite.value}
+              subsite={subsite}
+              onClick={() => handleSubsiteClick(subsite)}
+              size="default"
+            />
+          ))}
+        </div>
+      </div>
+      <div className="px-3 pt-0 pb-3">
+        <SectionHeader>Ecosystem</SectionHeader>
+        <div className="flex flex-col gap-1 pt-1">
+          {externalSubsites.map((subsite) => (
+            <SubsiteItem
+              key={subsite.value}
+              subsite={subsite}
+              onClick={() => handleSubsiteClick(subsite)}
+              size="default"
+              showArrow
+            />
+          ))}
         </div>
-      ))}
+      </div>
     </div>
   );
 }
@@ -100,9 +185,9 @@ export default function AfterNavTitle() {
   const [currentSubsite, setCurrentSubsite] = useState(() => {
     const segments = pathname.split('/');
     return (
-      SUBSITES_CONFIG.find((s) =>
+      internalSubsites.find((s) =>
         segments.some((seg) => seg.replace(/\.html$/, '') === s.value),
-      ) || SUBSITES_CONFIG[0]
+      ) || internalSubsites[0]
     );
   });
   const [isOpen, setIsOpen] = useState(false);
@@ -111,9 +196,9 @@ export default function AfterNavTitle() {
   useEffect(() => {
     const segments = pathname.split('/');
     const subsite =
-      SUBSITES_CONFIG.find((s) =>
+      internalSubsites.find((s) =>
         segments.some((seg) => seg.replace(/\.html$/, '') === s.value),
-      ) || SUBSITES_CONFIG[0];
+      ) || internalSubsites[0];
     setCurrentSubsite(subsite);
   }, [pathname]);
 
@@ -183,7 +268,7 @@ export default function AfterNavTitle() {
             <DropdownMenuTrigger asChild>
               <Trigger />
             </DropdownMenuTrigger>
-            <DropdownMenuContent className="w-56 p-0" align="start">
+            <DropdownMenuContent className="w-[520px] p-0" align="start">
               <NavContent onSelect={() => setIsOpen(false)} />
             </DropdownMenuContent>
           </div>
diff --git a/theme/subsite-ui.tsx b/theme/subsite-ui.tsx
index a1f9cc197..b947711f2 100644
--- a/theme/subsite-ui.tsx
+++ b/theme/subsite-ui.tsx
@@ -1,18 +1,19 @@
 import type { SubsiteConfig } from '@site/shared-route-config';
 import { withBase } from '@rspress/core/runtime';
 
-function isAbsoluteUrl(url: string): boolean {
-  return url.startsWith('/');
+function isExternalUrl(url: string): boolean {
+  return url.startsWith('http://') || url.startsWith('https://');
+}
+
+function resolveLogoUrl(url: string): string {
+  if (isExternalUrl(url)) return url;
+  if (url.startsWith('/')) return withBase(url);
+  return url;
 }
 
 export function SubsiteLogo({ subsite }: { subsite: SubsiteConfig }) {
-  // Ensure the logo URLs are absolute by prepending the site base if they are relative
-  const lightLogoSrc = isAbsoluteUrl(subsite.logo.light)
-    ? withBase(subsite.logo.light)
-    : subsite.logo.light;
-  const darkLogoSrc = isAbsoluteUrl(subsite.logo.dark)
-    ? withBase(subsite.logo.dark)
-    : subsite.logo.dark;
+  const lightLogoSrc = resolveLogoUrl(subsite.logo.light);
+  const darkLogoSrc = resolveLogoUrl(subsite.logo.dark);
 
   return (
     <>