diff --git a/docs/.vitepress/config.ts b/docs/.vitepress/config.ts
index 0bbeef1b..43f6b9cc 100644
--- a/docs/.vitepress/config.ts
+++ b/docs/.vitepress/config.ts
@@ -53,8 +53,8 @@ export default defineConfig({
     nav: nav(),
 
     sidebar: {
-      '/guide/': { base: '/guide/', items: sidebarGuide() },
-      '/reference/': { base: '/reference/', items: sidebarReference() }
+      '/guide/': sidebarGuide(),
+      '/reference/': sidebarReference()
     },
 
     editLink: {
@@ -122,72 +122,72 @@ function sidebarGuide(): DefaultTheme.SidebarItem[] {
       text: 'Introduction',
       collapsed: false,
       items: [
-        { text: 'What is VitePress?', link: 'what-is-vitepress' },
-        { text: 'Getting Started', link: 'getting-started' },
-        { text: 'Routing', link: 'routing' },
-        { text: 'Deploy', link: 'deploy' }
+        { text: 'What is VitePress?', link: '/guide/what-is-vitepress' },
+        { text: 'Getting Started', link: '/guide/getting-started' },
+        { text: 'Routing', link: '/guide/routing' },
+        { text: 'Deploy', link: '/guide/deploy' }
       ]
     },
     {
       text: 'Writing',
       collapsed: false,
       items: [
-        { text: 'Markdown Extensions', link: 'markdown' },
-        { text: 'Asset Handling', link: 'asset-handling' },
-        { text: 'Frontmatter', link: 'frontmatter' },
-        { text: 'Using Vue in Markdown', link: 'using-vue' },
-        { text: 'Internationalization', link: 'i18n' }
+        { text: 'Markdown Extensions', link: '/guide/markdown' },
+        { text: 'Asset Handling', link: '/guide/asset-handling' },
+        { text: 'Frontmatter', link: '/guide/frontmatter' },
+        { text: 'Using Vue in Markdown', link: '/guide/using-vue' },
+        { text: 'Internationalization', link: '/guide/i18n' }
       ]
     },
     {
       text: 'Customization',
       collapsed: false,
       items: [
-        { text: 'Using a Custom Theme', link: 'custom-theme' },
-        { text: 'Extending the Default Theme', link: 'extending-default-theme' },
-        { text: 'Build-Time Data Loading', link: 'data-loading' },
-        { text: 'SSR Compatibility', link: 'ssr-compat' },
-        { text: 'Connecting to a CMS', link: 'cms' }
+        { text: 'Using a Custom Theme', link: '/guide/custom-theme' },
+        { text: 'Extending the Default Theme', link: '/guide/extending-default-theme' },
+        { text: 'Build-Time Data Loading', link: '/guide/data-loading' },
+        { text: 'SSR Compatibility', link: '/guide/ssr-compat' },
+        { text: 'Connecting to a CMS', link: '/guide/cms' }
       ]
     },
     {
       text: 'Experimental',
       collapsed: false,
       items: [
-        { text: 'MPA Mode', link: 'mpa-mode' },
-        { text: 'Sitemap Generation', link: 'sitemap-generation' }
+        { text: 'MPA Mode', link: '/guide/mpa-mode' },
+        { text: 'Sitemap Generation', link: '/guide/sitemap-generation' }
       ]
     },
-    { text: 'Config & API Reference', base: '/reference/', link: 'site-config' }
+    { text: 'Config & API Reference', link: '/reference/site-config' }
   ]
 }
 
+/* prettier-ignore */
 function sidebarReference(): DefaultTheme.SidebarItem[] {
   return [
     {
       text: 'Reference',
       items: [
-        { text: 'Site Config', link: 'site-config' },
-        { text: 'Frontmatter Config', link: 'frontmatter-config' },
-        { text: 'Runtime API', link: 'runtime-api' },
-        { text: 'CLI', link: 'cli' },
+        { text: 'Site Config', link: '/reference/site-config' },
+        { text: 'Frontmatter Config', link: '/reference/frontmatter-config' },
+        { text: 'Runtime API', link: '/reference/runtime-api' },
+        { text: 'CLI', link: '/reference/cli' },
         {
           text: 'Default Theme',
-          base: '/reference/default-theme-',
           items: [
-            { text: 'Overview', link: 'config' },
-            { text: 'Nav', link: 'nav' },
-            { text: 'Sidebar', link: 'sidebar' },
-            { text: 'Home Page', link: 'home-page' },
-            { text: 'Footer', link: 'footer' },
-            { text: 'Layout', link: 'layout' },
-            { text: 'Badge', link: 'badge' },
-            { text: 'Team Page', link: 'team-page' },
-            { text: 'Prev / Next Links', link: 'prev-next-links' },
-            { text: 'Edit Link', link: 'edit-link' },
-            { text: 'Last Updated Timestamp', link: 'last-updated' },
-            { text: 'Search', link: 'search' },
-            { text: 'Carbon Ads', link: 'carbon-ads' }
+            { text: 'Overview', link: '/reference/default-theme-config' },
+            { text: 'Nav', link: '/reference/default-theme-nav' },
+            { text: 'Sidebar', link: '/reference/default-theme-sidebar' },
+            { text: 'Home Page', link: '/reference/default-theme-home-page' },
+            { text: 'Footer', link: '/reference/default-theme-footer' },
+            { text: 'Layout', link: '/reference/default-theme-layout' },
+            { text: 'Badge', link: '/reference/default-theme-badge' },
+            { text: 'Team Page', link: '/reference/default-theme-team-page' },
+            { text: 'Prev / Next Links', link: '/reference/default-theme-prev-next-links' },
+            { text: 'Edit Link', link: '/reference/default-theme-edit-link' },
+            { text: 'Last Updated Timestamp', link: '/reference/default-theme-last-updated' },
+            { text: 'Search', link: '/reference/default-theme-search' },
+            { text: 'Carbon Ads', link: '/reference/default-theme-carbon-ads' }
           ]
         }
       ]
diff --git a/src/client/theme-default/support/sidebar.ts b/src/client/theme-default/support/sidebar.ts
index 955eb23e..6385c55e 100644
--- a/src/client/theme-default/support/sidebar.ts
+++ b/src/client/theme-default/support/sidebar.ts
@@ -20,7 +20,7 @@ export function getSidebar(
   _sidebar: DefaultTheme.Sidebar | undefined,
   path: string
 ): SidebarItem[] {
-  if (Array.isArray(_sidebar)) return addBase(_sidebar)
+  if (Array.isArray(_sidebar)) return _sidebar
   if (_sidebar == null) return []
 
   path = ensureStartingSlash(path)
@@ -34,10 +34,7 @@ export function getSidebar(
       return path.startsWith(ensureStartingSlash(dir))
     })
 
-  const sidebar = dir ? _sidebar[dir] : []
-  return Array.isArray(sidebar)
-    ? addBase(sidebar)
-    : addBase(sidebar.items, sidebar.base)
+  return dir ? _sidebar[dir] : []
 }
 
 /**
@@ -107,13 +104,3 @@ export function hasActiveLink(
     ? hasActiveLink(path, items.items)
     : false
 }
-
-function addBase(items: SidebarItem[], _base?: string): SidebarItem[] {
-  return [...items].map((_item) => {
-    const item = { ..._item }
-    const base = item.base || _base
-    if (base && item.link) item.link = base + item.link
-    if (item.items) item.items = addBase(item.items, base)
-    return item
-  })
-}
diff --git a/types/default-theme.d.ts b/types/default-theme.d.ts
index aa9ab6f3..1e88c91d 100644
--- a/types/default-theme.d.ts
+++ b/types/default-theme.d.ts
@@ -202,7 +202,7 @@ export namespace DefaultTheme {
   export type Sidebar = SidebarItem[] | SidebarMulti
 
   export interface SidebarMulti {
-    [path: string]: SidebarItem[] | { items: SidebarItem[]; base: string }
+    [path: string]: SidebarItem[]
   }
 
   export type SidebarItem = {
@@ -230,11 +230,6 @@ export namespace DefaultTheme {
      */
     collapsed?: boolean
 
-    /**
-     * Base path for the children items.
-     */
-    base?: string
-
     /**
      * Customize text that appears on the footer of previous/next page.
      */