diff --git a/__tests__/e2e/multi-sidebar/index.test.ts b/__tests__/e2e/multi-sidebar/index.test.ts
index a8576993..294b3630 100644
--- a/__tests__/e2e/multi-sidebar/index.test.ts
+++ b/__tests__/e2e/multi-sidebar/index.test.ts
@@ -4,7 +4,9 @@ describe('test multi sidebar sort root', () => {
   })
 
   test('using / sidebar', async () => {
-    const sidebarLocator = page.locator('.VPSidebarGroup .title-text')
+    const sidebarLocator = page.locator(
+      '.VPSidebarItem.level-0 > .item > .link > .text'
+    )
 
     const sidebarContent = await sidebarLocator.allTextContents()
     expect(sidebarContent).toEqual([
@@ -22,7 +24,9 @@ describe('test multi sidebar sort order', () => {
   })
 
   test('using /multi-sidebar/ sidebar', async () => {
-    const sidebarLocator = page.locator('.VPSidebarGroup .title-text')
+    const sidebarLocator = page.locator(
+      '.VPSidebarItem.level-0 > .item > .link > .text'
+    )
 
     const sidebarContent = await sidebarLocator.allTextContents()
     expect(sidebarContent).toEqual(['Multi Sidebar'])
diff --git a/__tests__/unit/client/theme-default/support/sidebar.test.ts b/__tests__/unit/client/theme-default/support/sidebar.test.ts
index 4b451c7b..5afdb95e 100644
--- a/__tests__/unit/client/theme-default/support/sidebar.test.ts
+++ b/__tests__/unit/client/theme-default/support/sidebar.test.ts
@@ -1,96 +1,131 @@
-import { getSidebar } from 'client/theme-default/support/sidebar'
+import { getSidebar, hasActiveLink } from 'client/theme-default/support/sidebar'
 
 describe('client/theme-default/support/sidebar', () => {
-  const root = [
-    {
-      text: 'A',
-      collapsible: true,
-      items: [
-        {
-          text: 'A',
-          link: ''
-        }
-      ]
-    },
-    {
-      text: 'B',
-      items: [
-        {
-          text: 'B',
-          link: ''
-        }
-      ]
-    }
-  ]
-  const another = [
-    {
-      text: 'C',
-      items: [
+  describe('getSidebar', () => {
+    const root = [
+      {
+        text: 'A',
+        collapsible: true,
+        items: [{ text: 'A', link: '' }]
+      },
+      {
+        text: 'B',
+        items: [{ text: 'B', link: '' }]
+      }
+    ]
+
+    const another = [
+      {
+        text: 'C',
+        items: [{ text: 'C', link: '' }]
+      }
+    ]
+
+    describe('normal sidebar sort', () => {
+      const normalSidebar = {
+        '/': root,
+        '/multi-sidebar/': another
+      }
+
+      test('gets `/` sidebar', () => {
+        expect(getSidebar(normalSidebar, '/')).toBe(root)
+      })
+
+      test('gets `/multi-sidebar/` sidebar', () => {
+        expect(getSidebar(normalSidebar, '/multi-sidebar/')).toBe(another)
+      })
+
+      test('gets `/` sidebar again', () => {
+        expect(getSidebar(normalSidebar, '/some-entry.html')).toBe(root)
+      })
+    })
+
+    describe('reversed sidebar sort', () => {
+      const reversedSidebar = {
+        '/multi-sidebar/': another,
+        '/': root
+      }
+
+      test('gets `/` sidebar', () => {
+        expect(getSidebar(reversedSidebar, '/')).toBe(root)
+      })
+
+      test('gets `/multi-sidebar/` sidebar', () => {
+        expect(getSidebar(reversedSidebar, '/multi-sidebar/')).toBe(another)
+      })
+
+      test('gets `/` sidebar again', () => {
+        expect(getSidebar(reversedSidebar, '/some-entry.html')).toBe(root)
+      })
+    })
+
+    describe('nested sidebar sort', () => {
+      const nested = [
         {
-          text: 'C',
-          link: ''
+          text: 'D',
+          items: [{ text: 'D', link: '' }]
         }
       ]
-    }
-  ]
-  describe('normal sidebar sort', () => {
-    const normalSidebar = {
-      '/': root,
-      '/multi-sidebar/': another
-    }
-    test('gets / sidebar', () => {
-      expect(getSidebar(normalSidebar, '/')).toBe(root)
-    })
-    test('gets /multi-sidebar/ sidebar', () => {
-      expect(getSidebar(normalSidebar, '/multi-sidebar/')).toBe(another)
-    })
-    test('gets / sidebar again', () => {
-      expect(getSidebar(normalSidebar, '/some-entry.html')).toBe(root)
-    })
-  })
-  describe('reversed sidebar sort', () => {
-    const reversedSidebar = {
-      '/multi-sidebar/': another,
-      '/': root
-    }
-    test('gets / sidebar', () => {
-      expect(getSidebar(reversedSidebar, '/')).toBe(root)
-    })
-    test('gets /multi-sidebar/ sidebar', () => {
-      expect(getSidebar(reversedSidebar, '/multi-sidebar/')).toBe(another)
-    })
-    test('gets / sidebar again', () => {
-      expect(getSidebar(reversedSidebar, '/some-entry.html')).toBe(root)
+
+      const nestedSidebar = {
+        '/': root,
+        '/multi-sidebar/': another,
+        '/multi-sidebar/nested/': nested
+      }
+
+      test('gets `/` sidebar', () => {
+        expect(getSidebar(nestedSidebar, '/')).toBe(root)
+      })
+
+      test('gets `/multi-sidebar/` sidebar', () => {
+        expect(getSidebar(nestedSidebar, '/multi-sidebar/')).toBe(another)
+      })
+
+      test('gets `/multi-sidebar/nested/` sidebar', () => {
+        expect(getSidebar(nestedSidebar, '/multi-sidebar/nested/')).toBe(nested)
+      })
+
+      test('gets `/` sidebar again', () => {
+        expect(getSidebar(nestedSidebar, '/some-entry.html')).toBe(root)
+      })
     })
   })
-  describe('nested sidebar sort', () => {
-    const nested = [
-      {
-        text: 'D',
+
+  describe('hasActiveLink', () => {
+    test('checks `SidebarItem`', () => {
+      const item = {
+        text: 'Item 001',
         items: [
-          {
-            text: 'D',
-            link: ''
-          }
+          { text: 'Item 001', link: '/active-1' },
+          { text: 'Item 002', link: '/active-2' }
         ]
       }
-    ]
-    const nestedSidebar = {
-      '/': root,
-      '/multi-sidebar/': another,
-      '/multi-sidebar/nested/': nested
-    }
-    test('gets / sidebar', () => {
-      expect(getSidebar(nestedSidebar, '/')).toBe(root)
-    })
-    test('gets /multi-sidebar/ sidebar', () => {
-      expect(getSidebar(nestedSidebar, '/multi-sidebar/')).toBe(another)
-    })
-    test('gets /multi-sidebar/nested/ sidebar', () => {
-      expect(getSidebar(nestedSidebar, '/multi-sidebar/nested/')).toBe(nested)
+
+      expect(hasActiveLink('active-1', item)).toBe(true)
+      expect(hasActiveLink('inactive', item)).toBe(false)
     })
-    test('gets / sidebar again', () => {
-      expect(getSidebar(nestedSidebar, '/some-entry.html')).toBe(root)
+
+    test('checks `SidebarItem[]`', () => {
+      const item = [
+        {
+          text: 'Item 001',
+          items: [
+            { text: 'Item 001', link: '/active-1' },
+            { text: 'Item 002', link: '/active-2' }
+          ]
+        },
+        {
+          text: 'Item 002',
+          items: [
+            { text: 'Item 003', link: '/active-3' },
+            { text: 'Item 004', link: '/active-4' }
+          ]
+        }
+      ]
+
+      expect(hasActiveLink('active-1', item)).toBe(true)
+      expect(hasActiveLink('active-3', item)).toBe(true)
+      expect(hasActiveLink('inactive', item)).toBe(false)
     })
   })
 })
diff --git a/docs/config/theme-configs.md b/docs/config/theme-configs.md
index a92ad2c1..dd0b6e9f 100644
--- a/docs/config/theme-configs.md
+++ b/docs/config/theme-configs.md
@@ -124,22 +124,41 @@ export default {
 ```
 
 ```ts
-type Sidebar = SidebarGroup[] | SidebarMulti
+export type Sidebar = SidebarItem[] | SidebarMulti
 
-interface SidebarMulti {
-  [path: string]: SidebarGroup[]
+export interface SidebarMulti {
+  [path: string]: SidebarItem[]
 }
 
-interface SidebarGroup {
-  text: string
-  items: SidebarItem[]
+export type SidebarItem = {
+  /**
+   * The text label of the item.
+   */
+  text?: string
+
+  /**
+   * The link of the item.
+   */
+  link?: string
+
+  /**
+   * The children of the item.
+   */
+  items?: SidebarItem[]
+
+  /**
+   * If `true`, toggle button is shown.
+   *
+   * @default false
+   */
   collapsible?: boolean
-  collapsed?: boolean
-}
 
-interface SidebarItem {
-  text: string
-  link: string
+  /**
+   * If `true`, collapsible group is collapsed by default.
+   *
+   * @default false
+   */
+  collapsed?: boolean
 }
 ```
 
diff --git a/docs/guide/theme-sidebar.md b/docs/guide/theme-sidebar.md
index 21d78723..418cbf27 100644
--- a/docs/guide/theme-sidebar.md
+++ b/docs/guide/theme-sidebar.md
@@ -1,6 +1,6 @@
 # Sidebar
 
-The sidebar is the main navigation block for your documentation. You can configure the sidebar menu in `themeConfig.sidebar`.
+The sidebar is the main navigation block for your documentation. You can configure the sidebar menu in [`themeConfig.sidebar`](/config/theme-configs#sidebar).
 
 ```js
 export default {
@@ -21,7 +21,7 @@ export default {
 
 ## The Basics
 
-The simplest form of the sidebar menu is passing in a single array of links.  The first level item defines the "section" for the sidebar. It should contain `text`, which is the title of the section, and `items` which are the actual navigation links.
+The simplest form of the sidebar menu is passing in a single array of links. The first level item defines the "section" for the sidebar. It should contain `text`, which is the title of the section, and `items` which are the actual navigation links.
 
 ```js
 export default {
@@ -66,6 +66,33 @@ export default {
 }
 ```
 
+You may further nest the sidebar items up to 6 level deep counting up from the root level. Note that deeper than 6 level of nested items gets ignored and will not be displayed on the sidebar.
+
+```js
+export default {
+  themeConfig: {
+    sidebar: [
+      {
+        text: 'Level 1',
+        items: [
+          {
+            text: 'Level 2',
+            items: [
+              {
+                text: 'Level 3',
+                items: [
+                  ...
+                ]
+              }
+            ]
+          }
+        ]
+      }
+    ]
+  }
+}
+```
+
 ## Multiple Sidebars
 
 You may show different sidebar depending on the page path. For example, as shown on this site, you might want to create a separate sections of content in your documentation like "Guide" page and "Config" page.
@@ -90,30 +117,28 @@ Then, update your configuration to define your sidebar for each section. This ti
 export default {
   themeConfig: {
     sidebar: {
-      // This sidebar gets displayed when user is
-      // under `guide` directory.
+      // This sidebar gets displayed when a user
+      // is on `guide` directory.
       '/guide/': [
         {
           text: 'Guide',
           items: [
-            // This shows `/guide/index.md` page.
-            { text: 'Index', link: '/guide/' }, // /guide/index.md
-            { text: 'One', link: '/guide/one' }, // /guide/one.md
-            { text: 'Two', link: '/guide/two' } // /guide/two.md
+            { text: 'Index', link: '/guide/' },
+            { text: 'One', link: '/guide/one' },
+            { text: 'Two', link: '/guide/two' }
           ]
         }
       ],
 
-      // This sidebar gets displayed when user is
-      // under `config` directory.
+      // This sidebar gets displayed when a user
+      // is on `config` directory.
       '/config/': [
         {
           text: 'Config',
           items: [
-            // This shows `/config/index.md` page.
-            { text: 'Index', link: '/config/' }, // /config/index.md
-            { text: 'Three', link: '/config/three' }, // /config/three.md
-            { text: 'Four', link: '/config/four' } // /config/four.md
+            { text: 'Index', link: '/config/' },
+            { text: 'Three', link: '/config/three' },
+            { text: 'Four', link: '/config/four' }
           ]
         }
       ]
diff --git a/src/client/theme-default/components/VPLink.vue b/src/client/theme-default/components/VPLink.vue
index f960d327..40b9e9d6 100644
--- a/src/client/theme-default/components/VPLink.vue
+++ b/src/client/theme-default/components/VPLink.vue
@@ -5,16 +5,18 @@ import VPIconExternalLink from './icons/VPIconExternalLink.vue'
 import { EXTERNAL_URL_RE } from '../../shared.js'
 
 const props = defineProps<{
+  tag?: string
   href?: string
   noIcon?: boolean
 }>()
 
+const tag = computed(() => props.tag ?? props.href ? 'a' : 'span')
 const isExternal = computed(() => props.href && EXTERNAL_URL_RE.test(props.href))
 </script>
 
 <template>
   <component
-    :is="href ? 'a' : 'span'"
+    :is="tag"
     class="VPLink"
     :class="{ link: href }"
     :href="href ? normalizeLink(href) : undefined"
diff --git a/src/client/theme-default/components/VPSidebar.vue b/src/client/theme-default/components/VPSidebar.vue
index 2efd8c3d..8ee83cf0 100644
--- a/src/client/theme-default/components/VPSidebar.vue
+++ b/src/client/theme-default/components/VPSidebar.vue
@@ -2,9 +2,9 @@
 import { ref, watchPostEffect } from 'vue'
 import { disableBodyScroll, clearAllBodyScrollLocks } from 'body-scroll-lock'
 import { useSidebar } from '../composables/sidebar.js'
-import VPSidebarGroup from './VPSidebarGroup.vue'
+import VPSidebarItem from './VPSidebarItem.vue'
 
-const { sidebar, hasSidebar } = useSidebar()
+const { sidebarGroups, hasSidebar } = useSidebar()
 
 const props = defineProps<{
   open: boolean
@@ -48,13 +48,8 @@ watchPostEffect(async () => {
 
       <slot name="sidebar-nav-before" />
 
-      <div v-for="group in sidebar" :key="group.text" class="group">
-        <VPSidebarGroup
-          :text="group.text"
-          :items="group.items"
-          :collapsible="group.collapsible"
-          :collapsed="group.collapsed"
-        />
+      <div v-for="item in sidebarGroups" :key="item.text" class="group">
+        <VPSidebarItem :item="item" :depth="0" />
       </div>
 
       <slot name="sidebar-nav-after" />
@@ -134,7 +129,6 @@ watchPostEffect(async () => {
 }
 
 .group + .group {
-  margin-top: 32px;
   border-top: 1px solid var(--vp-c-divider);
   padding-top: 10px;
 }
@@ -144,9 +138,5 @@ watchPostEffect(async () => {
     padding-top: 10px;
     width: calc(var(--vp-sidebar-width) - 64px);
   }
-
-  .group + .group {
-    margin-top: 24px;
-  }
 }
 </style>
diff --git a/src/client/theme-default/components/VPSidebarGroup.vue b/src/client/theme-default/components/VPSidebarGroup.vue
deleted file mode 100644
index b53802b7..00000000
--- a/src/client/theme-default/components/VPSidebarGroup.vue
+++ /dev/null
@@ -1,128 +0,0 @@
-<script lang="ts" setup>
-import type { DefaultTheme } from 'vitepress/theme'
-import { ref, watchEffect } from 'vue'
-import { useData } from '../composables/data.js'
-import { isActive } from '../support/utils.js'
-import VPIconPlusSquare from './icons/VPIconPlusSquare.vue'
-import VPIconMinusSquare from './icons/VPIconMinusSquare.vue'
-import VPSidebarLink from './VPSidebarLink.vue'
-
-const props = defineProps<{
-  text?: string
-  items: DefaultTheme.SidebarItem[]
-  collapsible?: boolean
-  collapsed?: boolean
-}>()
-
-const collapsed = ref(false)
-watchEffect(() => {
-  collapsed.value = !!(props.collapsible && props.collapsed)
-})
-
-const { page } = useData()
-watchEffect(() => {
-  if(props.items.some((item) => { return isActive(page.value.relativePath, item.link) })){
-    collapsed.value = false
-  }
-})
-
-function toggle() {
-  if (props.collapsible) {
-    collapsed.value = !collapsed.value
-  }
-}
-</script>
-
-<template>
-  <section class="VPSidebarGroup" :class="{ collapsible, collapsed }">
-    <div
-      v-if="text"
-      class="title"
-      :role="collapsible ? 'button' : undefined"
-      @click="toggle"
-    >
-      <h2 v-html="text" class="title-text"></h2>
-      <div class="action">
-        <VPIconMinusSquare class="icon minus" />
-        <VPIconPlusSquare class="icon plus" />
-      </div>
-    </div>
-
-    <div class="items">
-      <template v-for="item in items" :key="item.link">
-        <VPSidebarLink :item="item" />
-      </template>
-    </div>
-  </section>
-</template>
-
-<style scoped>
-.title {
-  display: flex;
-  justify-content: space-between;
-  align-items: flex-start;
-  z-index: 2;
-}
-
-.title-text {
-  padding-top: 6px;
-  padding-bottom: 6px;
-  line-height: 20px;
-  font-size: 14px;
-  font-weight: 700;
-  color: var(--vp-c-text-1);
-}
-
-.action {
-  display: none;
-  position: relative;
-  margin-right: -8px;
-  border-radius: 4px;
-  width: 32px;
-  height: 32px;
-  color: var(--vp-c-text-3);
-  transition: color 0.25s;
-}
-
-.VPSidebarGroup.collapsible .action {
-  display: block;
-}
-
-.VPSidebarGroup.collapsible .title {
-  cursor: pointer;
-}
-
-.title:hover .action {
-  color: var(--vp-c-text-2);
-}
-
-.icon {
-  position: absolute;
-  top: 8px;
-  left: 8px;
-  width: 16px;
-  height: 16px;
-  fill: currentColor;
-}
-
-.icon.minus { opacity: 1; }
-.icon.plus  { opacity: 0; }
-
-.VPSidebarGroup.collapsed .icon.minus { opacity: 0; }
-.VPSidebarGroup.collapsed .icon.plus  { opacity: 1; }
-
-.items {
-  overflow: hidden;
-}
-
-.VPSidebarGroup.collapsed .items {
-  margin-bottom: -22px;
-  max-height: 0;
-}
-
-@media (min-width: 960px) {
-  .VPSidebarGroup.collapsed .items {
-    margin-bottom: -14px;
-  }
-}
-</style>
diff --git a/src/client/theme-default/components/VPSidebarItem.vue b/src/client/theme-default/components/VPSidebarItem.vue
new file mode 100644
index 00000000..c2d69347
--- /dev/null
+++ b/src/client/theme-default/components/VPSidebarItem.vue
@@ -0,0 +1,213 @@
+<script setup lang="ts">
+import { computed } from 'vue'
+import type { DefaultTheme } from 'vitepress/theme'
+import { useSidebarControl } from '../composables/sidebar.js'
+import VPIconChevronRight from './icons/VPIconChevronRight.vue'
+import VPLink from './VPLink.vue'
+
+const props = defineProps<{
+  item: DefaultTheme.SidebarItem
+  depth: number
+}>()
+
+const {
+  collapsed,
+  collapsible,
+  isLink,
+  isActiveLink,
+  hasActiveLink,
+  hasChildren,
+  toggle
+} = useSidebarControl(computed(() => props.item))
+
+const sectionTag = computed(() => hasChildren.value ? 'section' : `div`)
+
+const linkTag = computed(() => isLink.value ? 'a' : 'div')
+
+const textTag = computed(() => {
+  return !hasChildren.value
+    ? 'p'
+    : props.depth + 2 === 7 ? 'p' : `h${props.depth + 2}`
+})
+
+const itemRole = computed(() => isLink.value ? undefined : 'button')
+
+const classes = computed(() => [
+  [`level-${props.depth}`],
+  { collapsible: collapsible.value },
+  { collapsed: collapsed.value },
+  { 'is-link': isLink.value },
+  { 'is-active': isActiveLink.value },
+  { 'has-active': hasActiveLink.value }
+])
+
+function onItemClick() {
+  !props.item.link && toggle()
+}
+
+function onCaretClick() {
+  props.item.link && toggle()
+}
+</script>
+
+<template>
+  <component :is="sectionTag" class="VPSidebarItem" :class="classes">
+    <div v-if="item.text" class="item" :role="itemRole" @click="onItemClick">
+      <div class="indicator" />
+
+      <VPLink :tag="linkTag" class="link" :href="item.link">
+        <component :is="textTag" class="text" v-html="item.text" />
+      </VPLink>
+
+      <div class="caret" role="button" @click="onCaretClick">
+        <VPIconChevronRight v-if="item.collapsible" class="caret-icon" />
+      </div>
+    </div>
+
+    <div v-if="item.items && item.items.length" class="items">
+      <template v-if="depth < 5">
+        <VPSidebarItem
+          v-for="i in item.items"
+          :key="i.text"
+          :item="i"
+          :depth="depth + 1"
+        />
+      </template>
+    </div>
+  </component>
+</template>
+
+<style scoped>
+.VPSidebarItem.level-0 {
+  padding-bottom: 24px;
+}
+
+.VPSidebarItem.collapsed.level-0 {
+  padding-bottom: 10px;
+}
+
+.item {
+  position: relative;
+  display: flex;
+  width: 100%;
+}
+
+.VPSidebarItem.collapsible > .item {
+  cursor: pointer;
+}
+
+.indicator {
+  position: absolute;
+  top: 6px;
+  bottom: 6px;
+  left: -17px;
+  width: 1px;
+  transition: background-color 0.25s;
+}
+
+.VPSidebarItem.level-2.is-active > .item > .indicator,
+.VPSidebarItem.level-3.is-active > .item > .indicator,
+.VPSidebarItem.level-4.is-active > .item > .indicator,
+.VPSidebarItem.level-5.is-active > .item > .indicator {
+  background-color: var(--vp-c-brand);
+}
+
+.link {
+  display: block;
+  flex-grow: 1;
+}
+
+.text {
+  flex-grow: 1;
+  padding: 4px 0;
+  line-height: 24px;
+  font-size: 14px;
+  transition: color 0.25s;
+}
+
+.VPSidebarItem.level-0 .text {
+  font-weight: 700;
+  color: var(--vp-c-text-1);
+}
+
+.VPSidebarItem.level-1 .text,
+.VPSidebarItem.level-2 .text,
+.VPSidebarItem.level-3 .text,
+.VPSidebarItem.level-4 .text,
+.VPSidebarItem.level-5 .text {
+  font-weight: 500;
+  color: var(--vp-c-text-2);
+}
+
+.VPSidebarItem.level-0.is-link > .item > .link:hover .text,
+.VPSidebarItem.level-1.is-link > .item > .link:hover .text,
+.VPSidebarItem.level-2.is-link > .item > .link:hover .text,
+.VPSidebarItem.level-3.is-link > .item > .link:hover .text,
+.VPSidebarItem.level-4.is-link > .item > .link:hover .text,
+.VPSidebarItem.level-5.is-link > .item > .link:hover .text {
+  color: var(--vp-c-brand);
+}
+
+.VPSidebarItem.level-0.has-active > .item > .link > .text,
+.VPSidebarItem.level-1.has-active > .item > .link > .text,
+.VPSidebarItem.level-2.has-active > .item > .link > .text,
+.VPSidebarItem.level-3.has-active > .item > .link > .text,
+.VPSidebarItem.level-4.has-active > .item > .link > .text,
+.VPSidebarItem.level-5.has-active > .item > .link > .text {
+  color: var(--vp-c-text-1);
+}
+
+.VPSidebarItem.level-0.is-active > .item .link > .text,
+.VPSidebarItem.level-1.is-active > .item .link > .text,
+.VPSidebarItem.level-2.is-active > .item .link > .text,
+.VPSidebarItem.level-3.is-active > .item .link > .text,
+.VPSidebarItem.level-4.is-active > .item .link > .text,
+.VPSidebarItem.level-5.is-active > .item .link > .text {
+  color: var(--vp-c-brand);
+}
+
+.caret {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  margin-right: -7px;
+  width: 32px;
+  height: 32px;
+  color: var(--vp-c-text-3);
+  cursor: pointer;
+  transition: color 0.25s;
+}
+
+.item:hover .caret {
+  color: var(--vp-c-text-2);
+}
+
+.item:hover .caret:hover {
+  color: var(--vp-c-text-1);
+}
+
+.caret-icon {
+  width: 18px;
+  height: 18px;
+  fill: currentColor;
+  transform: rotate(90deg);
+  transition: transform 0.25s;
+}
+
+.VPSidebarItem.collapsed .caret-icon {
+  transform: rotate(0);
+}
+
+.VPSidebarItem.level-1 .items,
+.VPSidebarItem.level-2 .items,
+.VPSidebarItem.level-3 .items,
+.VPSidebarItem.level-4 .items,
+.VPSidebarItem.level-5 .items {
+  border-left: 1px solid var(--vp-c-divider);
+  padding-left: 16px;
+}
+
+.VPSidebarItem.collapsed .items {
+  display: none;
+}
+</style>
diff --git a/src/client/theme-default/components/VPSidebarLink.vue b/src/client/theme-default/components/VPSidebarLink.vue
deleted file mode 100644
index 8c2b549f..00000000
--- a/src/client/theme-default/components/VPSidebarLink.vue
+++ /dev/null
@@ -1,88 +0,0 @@
-<script lang="ts" setup>
-import type { DefaultTheme } from 'vitepress/theme'
-import { type Ref, computed, inject, ref, watchEffect } from 'vue'
-import { useData } from '../composables/data.js'
-import { useSidebar } from '../composables/sidebar.js'
-import { isActive } from '../support/utils.js'
-import VPLink from './VPLink.vue'
-
-const props = withDefaults(
-  defineProps<{ item: DefaultTheme.SidebarItem; depth?: number }>(),
-  { depth: 1 }
-)
-
-const { page, frontmatter } = useData()
-const maxDepth = computed<number>(
-  () => frontmatter.value.sidebarDepth || Infinity
-)
-
-const active = computed(() =>
-  isActive(page.value.relativePath, props.item.link)
-)
-
-const { isSidebarEnabled } = useSidebar()
-const closeSideBar = inject('close-sidebar') as () => void
-const isSidebarOpen = inject('is-sidebar-open') as Ref<boolean>
-
-const link = ref<InstanceType<typeof VPLink> | null>(null)
-watchEffect(() => {
-  if (isSidebarOpen.value && active.value) {
-    link.value?.$el?.focus()
-  }
-})
-</script>
-
-<template>
-  <VPLink
-    class="link"
-    :class="{ active }"
-    :style="{ paddingLeft: 16 * (depth - 1) + 'px' }"
-    :href="item.link"
-    :tabindex="isSidebarEnabled || isSidebarOpen ? 0 : -1"
-    @click="closeSideBar"
-    ref="link"
-  >
-    <span v-html="item.text" class="link-text" :class="{ light: depth > 1 }"></span>
-  </VPLink>
-  <template
-    v-if="'items' in item && depth < maxDepth"
-    v-for="child in item.items"
-    :key="child.link"
-  >
-    <VPSidebarLink :item="child" :depth="depth + 1" />
-  </template>
-</template>
-
-<style scoped>
-.link {
-  display: block;
-  margin: 4px 0;
-  color: var(--vp-c-text-2);
-  transition: color 0.5s;
-}
-
-.link:hover {
-  color: var(--vp-c-text-1);
-}
-
-.link.active {
-  color: var(--vp-c-brand);
-}
-
-.link :deep(.icon) {
-  width: 12px;
-  height: 12px;
-  fill: currentColor;
-}
-
-.link-text {
-  line-height: 20px;
-  font-size: 14px;
-  font-weight: 500;
-}
-
-.link-text.light {
-  font-size: 13px;
-  font-weight: 400;
-}
-</style>
diff --git a/src/client/theme-default/composables/sidebar.ts b/src/client/theme-default/composables/sidebar.ts
index d9d6a7b6..83662f27 100644
--- a/src/client/theme-default/composables/sidebar.ts
+++ b/src/client/theme-default/composables/sidebar.ts
@@ -1,15 +1,32 @@
 import {
+  type ComputedRef,
+  type Ref,
   computed,
   onMounted,
   onUnmounted,
-  type Ref,
   ref,
   watchEffect
 } from 'vue'
-import { useRoute } from 'vitepress'
 import { useMediaQuery } from '@vueuse/core'
+import { useRoute } from 'vitepress'
+import type { DefaultTheme } from 'vitepress/theme'
+import { isActive } from '../support/utils.js'
+import {
+  hasActiveLink as containsActiveLink,
+  getSidebar,
+  getSidebarGroups
+} from '../support/sidebar.js'
 import { useData } from './data.js'
-import { getSidebar } from '../support/sidebar.js'
+
+export interface SidebarControl {
+  collapsed: Ref<boolean>
+  collapsible: ComputedRef<boolean>
+  isLink: ComputedRef<boolean>
+  isActiveLink: ComputedRef<boolean>
+  hasActiveLink: ComputedRef<boolean>
+  hasChildren: ComputedRef<boolean>
+  toggle(): void
+}
 
 export function useSidebar() {
   const route = useRoute()
@@ -40,6 +57,10 @@ export function useSidebar() {
 
   const isSidebarEnabled = computed(() => hasSidebar.value && is960.value)
 
+  const sidebarGroups = computed(() => {
+    return hasSidebar.value ? getSidebarGroups(sidebar.value) : []
+  })
+
   function open() {
     isOpen.value = true
   }
@@ -55,6 +76,7 @@ export function useSidebar() {
   return {
     isOpen,
     sidebar,
+    sidebarGroups,
     hasSidebar,
     hasAside,
     isSidebarEnabled,
@@ -95,3 +117,61 @@ export function useCloseSidebarOnEscape(
     }
   }
 }
+
+export function useSidebarControl(
+  item: ComputedRef<DefaultTheme.SidebarItem>
+): SidebarControl {
+  const { page } = useData()
+
+  const collapsed = ref(false)
+
+  const collapsible = computed(() => {
+    return !!item.value.collapsible
+  })
+
+  const isLink = computed(() => {
+    return !!item.value.link
+  })
+
+  const isActiveLink = computed(() => {
+    return isActive(page.value.relativePath, item.value.link)
+  })
+
+  const hasActiveLink = computed(() => {
+    if (isActiveLink.value) {
+      return true
+    }
+
+    return item.value.items
+      ? containsActiveLink(page.value.relativePath, item.value.items)
+      : false
+  })
+
+  const hasChildren = computed(() => {
+    return !!(item.value.items && item.value.items.length)
+  })
+
+  watchEffect(() => {
+    collapsed.value = !!(item.value.collapsible && item.value.collapsed)
+  })
+
+  watchEffect(() => {
+    ;(isActiveLink.value || hasActiveLink.value) && (collapsed.value = false)
+  })
+
+  function toggle() {
+    if (item.value.collapsible) {
+      collapsed.value = !collapsed.value
+    }
+  }
+
+  return {
+    collapsed,
+    collapsible,
+    isLink,
+    isActiveLink,
+    hasActiveLink,
+    hasChildren,
+    toggle
+  }
+}
diff --git a/src/client/theme-default/support/sidebar.ts b/src/client/theme-default/support/sidebar.ts
index f7ef3cd4..4d4e9ee8 100644
--- a/src/client/theme-default/support/sidebar.ts
+++ b/src/client/theme-default/support/sidebar.ts
@@ -1,5 +1,10 @@
 import type { DefaultTheme } from 'vitepress/theme'
-import { ensureStartingSlash } from './utils.js'
+import { ensureStartingSlash, isActive } from './utils.js'
+
+export interface SidebarLink {
+  text: string
+  link: string
+}
 
 /**
  * Get the `Sidebar` from sidebar option. This method will ensure to get correct
@@ -10,7 +15,7 @@ import { ensureStartingSlash } from './utils.js'
 export function getSidebar(
   sidebar: DefaultTheme.Sidebar | undefined,
   path: string
-): DefaultTheme.SidebarGroup[] {
+): DefaultTheme.SidebarItem[] {
   if (Array.isArray(sidebar)) {
     return sidebar
   }
@@ -33,22 +38,70 @@ export function getSidebar(
   return dir ? sidebar[dir] : []
 }
 
-export function getFlatSideBarLinks(sidebar: DefaultTheme.SidebarGroup[]) {
-  const links: { text: string; link: string }[] = []
+/**
+ * Get or generate sidebar group from the given sidebar items.
+ */
+export function getSidebarGroups(
+  sidebar: DefaultTheme.SidebarItem[]
+): DefaultTheme.SidebarItem[] {
+  const groups: DefaultTheme.SidebarItem[] = []
+
+  let lastGroupIndex: number = 0
+
+  for (const index in sidebar) {
+    const item = sidebar[index]
+
+    if (item.items) {
+      lastGroupIndex = groups.push(item)
+      continue
+    }
+
+    if (!groups[lastGroupIndex]) {
+      groups.push({ items: [] })
+    }
+
+    groups[lastGroupIndex]!.items!.push(item)
+  }
+
+  return groups
+}
+
+export function getFlatSideBarLinks(
+  sidebar: DefaultTheme.SidebarItem[]
+): SidebarLink[] {
+  const links: SidebarLink[] = []
 
   function recursivelyExtractLinks(items: DefaultTheme.SidebarItem[]) {
     for (const item of items) {
-      if (item.link) {
-        links.push({ ...item, link: item.link })
+      if (item.text && item.link) {
+        links.push({ text: item.text, link: item.link })
       }
-      if ('items' in item) {
+
+      if (item.items) {
         recursivelyExtractLinks(item.items)
       }
     }
   }
 
-  for (const group of sidebar) {
-    recursivelyExtractLinks(group.items)
-  }
+  recursivelyExtractLinks(sidebar)
+
   return links
 }
+
+/**
+ * Check if the given sidebar item contains any active link.
+ */
+export function hasActiveLink(
+  path: string,
+  items: DefaultTheme.SidebarItem | DefaultTheme.SidebarItem[]
+): boolean {
+  if (Array.isArray(items)) {
+    return items.some((item) => hasActiveLink(path, item))
+  }
+
+  return isActive(path, items.link)
+    ? true
+    : items.items
+    ? hasActiveLink(path, items.items)
+    : false
+}
diff --git a/types/default-theme.d.ts b/types/default-theme.d.ts
index 063ad722..fcbe8f04 100644
--- a/types/default-theme.d.ts
+++ b/types/default-theme.d.ts
@@ -160,15 +160,27 @@ export namespace DefaultTheme {
 
   // sidebar -------------------------------------------------------------------
 
-  export type Sidebar = SidebarGroup[] | SidebarMulti
+  export type Sidebar = SidebarItem[] | SidebarMulti
 
   export interface SidebarMulti {
-    [path: string]: SidebarGroup[]
+    [path: string]: SidebarItem[]
   }
 
-  export interface SidebarGroup {
+  export type SidebarItem = {
+    /**
+     * The text label of the item.
+     */
     text?: string
-    items: SidebarItem[]
+
+    /**
+     * The link of the item.
+     */
+    link?: string
+
+    /**
+     * The children of the item.
+     */
+    items?: SidebarItem[]
 
     /**
      * If `true`, toggle button is shown.
@@ -185,10 +197,6 @@ export namespace DefaultTheme {
     collapsed?: boolean
   }
 
-  export type SidebarItem =
-    | { text: string; link: string }
-    | { text: string; link?: string; items: SidebarItem[] }
-
   // edit link -----------------------------------------------------------------
 
   export interface EditLink {