diff --git a/docs/components/collapse.md b/docs/components/collapse.md
index 5ea90c6..1ac972d 100644
--- a/docs/components/collapse.md
+++ b/docs/components/collapse.md
@@ -15,12 +15,25 @@
 }
 `" />
 
+## 可访问性
+
+每个面板标题使用原生 `button`，并通过 `aria-expanded` 和 `aria-controls` 关联展开内容。展开后的内容区域会以 `region` 暴露，并通过标题按钮命名。
+
 ## API
 
-| 属性 | 说明 | 类型 | 默认值 |
-| --- | --- | --- | --- |
-| items | 面板项 | `CollapseItem[]` | - |
-| activeKey | 展开的 key | `string \| string[]` | - |
-| defaultActiveKey | 默认展开 | `string \| string[]` | - |
-| accordion | 手风琴模式 | `boolean` | `false` |
-| onChange | 变化回调 | `(key) => void` | - |
+| 属性             | 说明                | 类型                            | 默认值  |
+| ---------------- | ------------------- | ------------------------------- | ------- |
+| items            | 面板项              | `CollapseItem[]`                | -       |
+| activeKey        | 展开的 key 列表     | `string[]`                      | -       |
+| defaultActiveKey | 默认展开的 key 列表 | `string[]`                      | `[]`    |
+| accordion        | 手风琴模式          | `boolean`                       | `false` |
+| onChange         | 变化回调            | `(activeKey: string[]) => void` | -       |
+
+## CollapseItem
+
+| 属性     | 说明         | 类型        | 默认值  |
+| -------- | ------------ | ----------- | ------- |
+| key      | 面板唯一标识 | `string`    | -       |
+| title    | 面板标题     | `ReactNode` | -       |
+| content  | 面板内容     | `ReactNode` | -       |
+| disabled | 禁用面板     | `boolean`   | `false` |
diff --git a/packages/ui/src/components/navigation/Collapse/Collapse.test.tsx b/packages/ui/src/components/navigation/Collapse/Collapse.test.tsx
new file mode 100644
index 0000000..3d13775
--- /dev/null
+++ b/packages/ui/src/components/navigation/Collapse/Collapse.test.tsx
@@ -0,0 +1,72 @@
+import { render, screen } from '@testing-library/react'
+import userEvent from '@testing-library/user-event'
+import { describe, expect, it, vi } from 'vitest'
+
+import { Collapse } from './Collapse'
+
+const items = [
+  { key: 'intro', title: 'Introduction', content: 'Nova UI basics' },
+  { key: 'usage', title: 'Usage', content: 'Install and import components' },
+  { key: 'disabled', title: 'Disabled', content: 'Locked content', disabled: true },
+]
+
+describe('Collapse', () => {
+  it('links each trigger to its controlled panel state', () => {
+    render(<Collapse items={items} defaultActiveKey={['intro']} />)
+
+    const introTrigger = screen.getByRole('button', { name: 'Introduction' })
+    const usageTrigger = screen.getByRole('button', { name: 'Usage' })
+    const introPanel = screen.getByRole('region', { name: 'Introduction' })
+
+    expect(introTrigger).toHaveAttribute('aria-expanded', 'true')
+    expect(introTrigger).toHaveAttribute('aria-controls', introPanel.id)
+    expect(introPanel).toHaveAttribute('aria-labelledby', introTrigger.id)
+    expect(usageTrigger).toHaveAttribute('aria-expanded', 'false')
+  })
+
+  it('toggles panels and reports active keys', async () => {
+    const user = userEvent.setup()
+    const onChange = vi.fn()
+
+    render(<Collapse items={items} onChange={onChange} />)
+
+    await user.click(screen.getByRole('button', { name: 'Introduction' }))
+    expect(onChange).toHaveBeenCalledWith(['intro'])
+    expect(screen.getByRole('button', { name: 'Introduction' })).toHaveAttribute(
+      'aria-expanded',
+      'true',
+    )
+
+    await user.click(screen.getByRole('button', { name: 'Usage' }))
+    expect(onChange).toHaveBeenLastCalledWith(['intro', 'usage'])
+    expect(screen.getByRole('region', { name: 'Usage' })).toBeInTheDocument()
+  })
+
+  it('keeps a single panel open in accordion mode', async () => {
+    const user = userEvent.setup()
+    const onChange = vi.fn()
+
+    render(<Collapse items={items} defaultActiveKey={['intro']} accordion onChange={onChange} />)
+
+    await user.click(screen.getByRole('button', { name: 'Usage' }))
+
+    expect(onChange).toHaveBeenCalledWith(['usage'])
+    expect(screen.queryByRole('region', { name: 'Introduction' })).not.toBeInTheDocument()
+    expect(screen.getByRole('region', { name: 'Usage' })).toBeInTheDocument()
+  })
+
+  it('does not toggle disabled panels', async () => {
+    const user = userEvent.setup()
+    const onChange = vi.fn()
+
+    render(<Collapse items={items} onChange={onChange} />)
+
+    const disabledTrigger = screen.getByRole('button', { name: 'Disabled' })
+    expect(disabledTrigger).toBeDisabled()
+
+    await user.click(disabledTrigger)
+
+    expect(onChange).not.toHaveBeenCalled()
+    expect(screen.queryByRole('region', { name: 'Disabled' })).not.toBeInTheDocument()
+  })
+})
diff --git a/packages/ui/src/components/navigation/Collapse/Collapse.tsx b/packages/ui/src/components/navigation/Collapse/Collapse.tsx
index b898f01..79feb0e 100644
--- a/packages/ui/src/components/navigation/Collapse/Collapse.tsx
+++ b/packages/ui/src/components/navigation/Collapse/Collapse.tsx
@@ -1,4 +1,4 @@
-import { forwardRef, type HTMLAttributes, type ReactNode } from 'react'
+import { forwardRef, type HTMLAttributes, type ReactNode, useId } from 'react'
 import { cn } from '../../../utils/cn'
 import { useControllableState } from '../../../utils/useControllableState'
 
@@ -21,6 +21,7 @@ export const Collapse = forwardRef<HTMLDivElement, CollapseProps>(function Colla
   { className, items, activeKey, defaultActiveKey = [], accordion = false, onChange, ...props },
   ref,
 ) {
+  const generatedId = useId()
   const [current, setCurrent] = useControllableState<string[]>({
     value: activeKey,
     defaultValue: defaultActiveKey,
@@ -40,18 +41,35 @@ export const Collapse = forwardRef<HTMLDivElement, CollapseProps>(function Colla
     <div ref={ref} className={cn('space-y-2', className)} {...props}>
       {items.map((item) => {
         const open = current.includes(item.key)
+        const buttonId = `${generatedId}-${item.key}-trigger`
+        const panelId = `${generatedId}-${item.key}-panel`
         return (
-          <div key={item.key} className="overflow-hidden rounded-lg border border-slate-200 dark:border-slate-700">
+          <div
+            key={item.key}
+            className="overflow-hidden rounded-lg border border-slate-200 dark:border-slate-700"
+          >
             <button
+              id={buttonId}
               type="button"
+              aria-controls={panelId}
+              aria-expanded={open}
               disabled={item.disabled}
               onClick={() => toggle(item.key)}
               className="nova-focus-ring flex w-full items-center justify-between bg-white px-4 py-3 text-left text-sm font-medium text-slate-800 disabled:opacity-50 dark:bg-slate-900 dark:text-slate-100"
             >
               {item.title}
-              <span>{open ? '−' : '+'}</span>
+              <span aria-hidden="true">{open ? '−' : '+'}</span>
             </button>
-            {open ? <div className="bg-slate-50 px-4 py-3 text-sm text-slate-600 dark:bg-slate-900/40 dark:text-slate-300">{item.content}</div> : null}
+            {open ? (
+              <div
+                id={panelId}
+                role="region"
+                aria-labelledby={buttonId}
+                className="bg-slate-50 px-4 py-3 text-sm text-slate-600 dark:bg-slate-900/40 dark:text-slate-300"
+              >
+                {item.content}
+              </div>
+            ) : null}
           </div>
         )
       })}