diff --git a/src/renderer/src/components/export/ExportConfigurationPanel.tsx b/src/renderer/src/components/export/ExportConfigurationPanel.tsx
index a4c2cc6..02e503a 100644
--- a/src/renderer/src/components/export/ExportConfigurationPanel.tsx
+++ b/src/renderer/src/components/export/ExportConfigurationPanel.tsx
@@ -1,7 +1,15 @@
 import React from 'react'
 import type { ExportContactType, ExportNameMode } from '../../../../shared/export'
 import type { VoiceModelStatus } from '../../../../shared/voice-recognition'
-import { Button, Checkbox, Input, RadioGroup, RadioGroupItem } from '../ui'
+import {
+  Button,
+  Checkbox,
+  Input,
+  RadioGroup,
+  RadioGroupItem,
+  SegmentedControl,
+  SegmentedControlItem
+} from '../ui'
 import type { Contact, ExportFormat, ExportRange, ExportStatus } from './exportTypes'
 import { displayName, formatLabels, formatOrder, messageKinds } from './exportUtils'
 
@@ -167,19 +175,19 @@ export function ExportConfigurationPanel({
 
         <section className={sectionClassName}>
           <h3 className={sectionTitleClassName}>导出格式</h3>
-          <div className="grid grid-cols-2 gap-2 min-[900px]:grid-cols-4">
+          <SegmentedControl
+            className="grid w-full grid-cols-2 gap-1.5 p-1.5 min-[900px]:grid-cols-4"
+            value={format}
+            onValueChange={(value) => onFormatChange(value as ExportFormat)}
+            aria-label="导出格式"
+          >
             {formatOrder.map((value) => {
-              const active = format === value
               return (
-                <Button
+                <SegmentedControlItem
                   key={value}
-                  variant="outline"
-                  aria-pressed={active}
-                  className={`${
-                    active ? 'active border-2 border-primary bg-primary/10 hover:bg-primary/15' : ''
-                  } !h-[78px] min-w-0 flex-col gap-1.5 whitespace-normal px-2 text-foreground`}
+                  value={value}
+                  className="!h-[78px] min-w-0 flex-col gap-1.5 whitespace-normal rounded-md px-2 text-foreground data-[state=checked]:text-primary"
                   disabled={!exportAll && exportContactCount > 1 && value !== 'html'}
-                  onClick={() => onFormatChange(value)}
                 >
                   <strong className="text-[13px]">{formatLabels[value].label}</strong>
                   {formatLabels[value].hint && (
@@ -187,10 +195,10 @@ export function ExportConfigurationPanel({
                       {formatLabels[value].hint}
                     </small>
                   )}
-                </Button>
+                </SegmentedControlItem>
               )
             })}
-          </div>
+          </SegmentedControl>
           <p className={helperClassName}>
             {exportAll
               ? '全部导出固定使用全部时间；每个群聊或联系人都会在自己的目录中生成所选格式的独立档案。'
@@ -229,7 +237,12 @@ export function ExportConfigurationPanel({
               {status === 'completed' ? '已完成导出' : '消息数量将在开始导出后统计'}
             </span>
           </div>
-          <div className="grid grid-cols-2 gap-2">
+          <SegmentedControl
+            className="grid w-full grid-cols-2 gap-1.5 p-1.5 min-[900px]:grid-cols-3"
+            value={range}
+            onValueChange={(value) => onRangeChange(value as ExportRange)}
+            aria-label="时间范围"
+          >
             {(exportAll
               ? [['all', '全部时间']]
               : [
@@ -240,17 +253,11 @@ export function ExportConfigurationPanel({
                   ['custom', '自定义时间']
                 ]
             ).map(([value, label]) => (
-              <Button
-                key={value}
-                variant={range === value ? 'default' : 'outline'}
-                aria-pressed={range === value}
-                className={range === value ? 'active' : ''}
-                onClick={() => onRangeChange(value as ExportRange)}
-              >
+              <SegmentedControlItem key={value} value={value} className="w-full">
                 {label}
-              </Button>
+              </SegmentedControlItem>
             ))}
-          </div>
+          </SegmentedControl>
           {!exportAll && range === 'custom' && (
             <div className="mt-2.5 grid grid-cols-2 gap-2.5 rounded-lg bg-muted p-3">
               <label className="grid gap-1.5 text-[11px] text-muted-foreground">
@@ -295,23 +302,22 @@ export function ExportConfigurationPanel({
 
         <section className={sectionClassName}>
           <h3 className={sectionTitleClassName}>消息显示名称</h3>
-          <RadioGroup
-            className="flex gap-2 rounded-lg bg-muted p-2.5"
+          <SegmentedControl
+            className="grid w-full grid-cols-3 gap-1.5 p-1.5"
             value={nameMode}
             onValueChange={(value) => onNameModeChange(value as ExportNameMode)}
             aria-label="消息显示名称"
           >
             {nameOptions.map((option) => (
-              <label
+              <SegmentedControlItem
                 key={option.value}
-                className="flex min-h-8 flex-1 cursor-pointer items-center gap-2 rounded-md border border-border bg-surface px-2 text-xs text-foreground"
-                htmlFor={`export-name-${option.value}`}
+                value={option.value}
+                className="w-full justify-start gap-2 px-2 text-foreground data-[state=checked]:text-primary"
               >
-                <RadioGroupItem id={`export-name-${option.value}`} value={option.value} />
                 <span>{option.label}</span>
-              </label>
+              </SegmentedControlItem>
             ))}
-          </RadioGroup>
+          </SegmentedControl>
         </section>
 
         <section className={sectionClassName}>
diff --git a/src/renderer/src/components/reports/ReportToolbar.tsx b/src/renderer/src/components/reports/ReportToolbar.tsx
index 6a9f5de..5568fde 100644
--- a/src/renderer/src/components/reports/ReportToolbar.tsx
+++ b/src/renderer/src/components/reports/ReportToolbar.tsx
@@ -109,7 +109,7 @@ export function ReportToolbar({
       </Button>
       <DropdownMenu>
         <DropdownMenuTrigger asChild>
-          <Button variant="outline" size="sm">
+          <Button variant="ghost" size="sm">
             更多
           </Button>
         </DropdownMenuTrigger>
diff --git a/src/renderer/src/components/search/AISearchWorkspace.tsx b/src/renderer/src/components/search/AISearchWorkspace.tsx
index 70d572d..1b84aec 100644
--- a/src/renderer/src/components/search/AISearchWorkspace.tsx
+++ b/src/renderer/src/components/search/AISearchWorkspace.tsx
@@ -681,7 +681,7 @@ export function AISearchWorkspace({
             新问题
           </Button>
           <Button
-            variant="outline"
+            variant="ghost"
             size="sm"
             className="px-2"
             onClick={() => void copyAnswer()}
@@ -690,7 +690,7 @@ export function AISearchWorkspace({
             复制摘要
           </Button>
           <Button
-            variant="outline"
+            variant="ghost"
             size="sm"
             className="px-2"
             onClick={() => {
diff --git a/src/renderer/src/components/ui/button.tsx b/src/renderer/src/components/ui/button.tsx
index f29de1d..46a6f6c 100644
--- a/src/renderer/src/components/ui/button.tsx
+++ b/src/renderer/src/components/ui/button.tsx
@@ -14,7 +14,7 @@ const buttonVariants = cva(
         ghost:
           'text-foreground hover:bg-accent hover:text-accent-foreground active:bg-accent/75 disabled:text-disabled-foreground',
         outline:
-          'border border-border bg-surface text-foreground hover:border-primary/25 hover:bg-accent active:bg-accent/75 disabled:border-disabled-border disabled:bg-disabled-surface disabled:text-disabled-foreground',
+          'border border-border-subtle bg-transparent text-foreground hover:border-primary/20 hover:bg-accent active:border-primary/30 active:bg-accent/75 disabled:border-disabled-border disabled:bg-disabled-surface disabled:text-disabled-foreground',
         destructive:
           'bg-destructive text-destructive-foreground hover:bg-destructive/90 active:bg-destructive/80 disabled:bg-disabled-surface disabled:text-disabled-foreground',
         link: '!h-auto !p-0 text-primary underline-offset-4 hover:text-primary-hover hover:underline disabled:text-disabled-foreground'
diff --git a/src/renderer/src/components/ui/icon-button.tsx b/src/renderer/src/components/ui/icon-button.tsx
index 00209ac..f3aa8c1 100644
--- a/src/renderer/src/components/ui/icon-button.tsx
+++ b/src/renderer/src/components/ui/icon-button.tsx
@@ -12,10 +12,11 @@ export function IconButton({
   label,
   tooltip = label,
   children,
+  variant = 'ghost',
   ...props
 }: IconButtonProps): React.ReactElement {
   const button = (
-    <Button aria-label={label} size="icon" {...props}>
+    <Button aria-label={label} size="icon" variant={variant} {...props}>
       {children}
     </Button>
   )
diff --git a/src/renderer/src/components/ui/segmented-control.tsx b/src/renderer/src/components/ui/segmented-control.tsx
index 865a0d1..9b435fc 100644
--- a/src/renderer/src/components/ui/segmented-control.tsx
+++ b/src/renderer/src/components/ui/segmented-control.tsx
@@ -21,7 +21,7 @@ const SegmentedControlItem = React.forwardRef<
   <RadioGroupPrimitive.Item
     ref={ref}
     className={cn(
-      'inline-flex h-8 min-w-0 items-center justify-center rounded-sm border-0 bg-transparent px-3 text-xs font-medium text-muted-foreground transition-colors duration-fast ease-tm-standard hover:bg-accent hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-surface data-[state=checked]:text-primary data-[state=checked]:shadow-surface',
+      'inline-flex h-8 min-w-0 items-center justify-center rounded-sm border-0 bg-transparent px-3 text-xs font-medium text-muted-foreground transition-[color,background-color,font-weight] duration-fast ease-tm-standard hover:bg-accent hover:text-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:cursor-not-allowed disabled:text-disabled-foreground disabled:opacity-100 data-[state=checked]:bg-accent data-[state=checked]:font-semibold data-[state=checked]:text-accent-foreground',
       className
     )}
     {...props}
diff --git a/src/renderer/src/features/agent-hub/AgentHubWorkspace.tsx b/src/renderer/src/features/agent-hub/AgentHubWorkspace.tsx
index 8d42e93..0d8fcfa 100644
--- a/src/renderer/src/features/agent-hub/AgentHubWorkspace.tsx
+++ b/src/renderer/src/features/agent-hub/AgentHubWorkspace.tsx
@@ -254,14 +254,14 @@ export function AgentHubWorkspace(): React.ReactElement {
               </SelectContent>
             </Select>
             <Button
-              variant="outline"
+              variant="ghost"
               size="sm"
               onClick={() => void copyLogs()}
               disabled={visibleLogs.length === 0}
             >
               复制日志
             </Button>
-            <Button variant="outline" size="sm" onClick={() => void clearLogs()}>
+            <Button variant="ghost" size="sm" onClick={() => void clearLogs()}>
               清空
             </Button>
           </div>
diff --git a/src/renderer/src/features/api-center/components/ReaderSkillOverview.tsx b/src/renderer/src/features/api-center/components/ReaderSkillOverview.tsx
index 0dee7f4..4148487 100644
--- a/src/renderer/src/features/api-center/components/ReaderSkillOverview.tsx
+++ b/src/renderer/src/features/api-center/components/ReaderSkillOverview.tsx
@@ -65,7 +65,7 @@ export function ReaderSkillOverview({
             </Button>
             <DropdownMenu>
               <DropdownMenuTrigger asChild>
-                <Button size="sm" variant="outline">
+                <Button size="sm" variant="ghost">
                   更多
                 </Button>
               </DropdownMenuTrigger>
diff --git a/tests/component/export-voice-transcript.test.tsx b/tests/component/export-voice-transcript.test.tsx
index a04f6cf..58a4e53 100644
--- a/tests/component/export-voice-transcript.test.tsx
+++ b/tests/component/export-voice-transcript.test.tsx
@@ -1,4 +1,4 @@
-import { render, screen, waitFor } from '@testing-library/react'
+import { render, screen, waitFor, within } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { ExportWorkspace } from '../../src/renderer/src/components/export/ExportWorkspace'
@@ -56,7 +56,11 @@ describe('export voice transcripts', () => {
       />
     )
 
-    await userEvent.click(screen.getAllByRole('button', { name: /HTML/ })[0])
+    await userEvent.click(
+      within(screen.getByRole('radiogroup', { name: '导出格式' })).getByRole('radio', {
+        name: /HTML/
+      })
+    )
     await userEvent.click(screen.getByRole('checkbox', { name: '语音' }))
 
     const transcriptOption = await screen.findByRole('checkbox', {
diff --git a/tests/component/export-workspace.test.tsx b/tests/component/export-workspace.test.tsx
index 37a7127..79348df 100644
--- a/tests/component/export-workspace.test.tsx
+++ b/tests/component/export-workspace.test.tsx
@@ -1,4 +1,4 @@
-import { render, screen, waitFor } from '@testing-library/react'
+import { render, screen, waitFor, within } from '@testing-library/react'
 import userEvent from '@testing-library/user-event'
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 import { ExportWorkspace } from '../../src/renderer/src/components/export/ExportWorkspace'
@@ -64,17 +64,21 @@ describe('ExportWorkspace multi-chat selection', () => {
     const { loadPreviewMessages } = renderWorkspace(onStartExport)
 
     expect(screen.getAllByText('聊天 A')).toHaveLength(2)
-    expect(screen.getByRole('button', { name: 'CSV' })).toBeEnabled()
+    expect(screen.getByRole('radio', { name: 'CSV' })).toBeEnabled()
     expect(await screen.findByText('聊天 A 的预览')).toBeVisible()
 
     await userEvent.click(screen.getByRole('button', { name: '+ 添加聊天' }))
     await userEvent.click(screen.getByRole('button', { name: /聊天 B/ }))
 
     expect(screen.getByText('已选 2 / 5 个')).toBeVisible()
-    expect(screen.getByRole('button', { name: 'CSV' })).toBeDisabled()
-    expect(screen.getByRole('button', { name: 'JSON' })).toBeDisabled()
-    expect(screen.getByRole('button', { name: 'Markdown' })).toBeDisabled()
-    expect(screen.getByRole('button', { name: /HTML/ })).toHaveClass('active')
+    expect(screen.getByRole('radio', { name: 'CSV' })).toBeDisabled()
+    expect(screen.getByRole('radio', { name: 'JSON' })).toBeDisabled()
+    expect(screen.getByRole('radio', { name: 'Markdown' })).toBeDisabled()
+    expect(
+      within(screen.getByRole('radiogroup', { name: '导出格式' })).getByRole('radio', {
+        name: /HTML/
+      })
+    ).toBeChecked()
     expect(await screen.findByText('聊天 B 的预览')).toBeVisible()
     expect(screen.getByText('2 个聊天 · 合并预览')).toBeVisible()
 
@@ -91,7 +95,7 @@ describe('ExportWorkspace multi-chat selection', () => {
 
     await userEvent.click(screen.getByRole('button', { name: '恢复默认' }))
     expect(screen.queryByText('已选 2 / 5 个')).not.toBeInTheDocument()
-    expect(screen.getByRole('button', { name: 'CSV' })).toBeEnabled()
+    expect(screen.getByRole('radio', { name: 'CSV' })).toBeEnabled()
     expect(screen.getAllByText('聊天 A').length).toBeGreaterThanOrEqual(2)
     expect(loadPreviewMessages).toHaveBeenCalledWith(contacts[0])
     expect(contacts[0].md5).toBe('contact-1')
@@ -123,10 +127,10 @@ describe('ExportWorkspace multi-chat selection', () => {
     await userEvent.click(screen.getByRole('button', { name: /全部导出/ }))
 
     expect(screen.getByText(/全部群聊 1 个和全部联系人 5 个/)).toBeVisible()
-    expect(screen.getByRole('button', { name: 'CSV' })).toBeEnabled()
-    expect(screen.getByRole('button', { name: 'CSV' })).toHaveClass('active')
-    expect(screen.getByRole('button', { name: 'JSON' })).toBeEnabled()
-    expect(screen.getByRole('button', { name: 'Markdown' })).toBeEnabled()
+    expect(screen.getByRole('radio', { name: 'CSV' })).toBeEnabled()
+    expect(screen.getByRole('radio', { name: 'CSV' })).toBeChecked()
+    expect(screen.getByRole('radio', { name: 'JSON' })).toBeEnabled()
+    expect(screen.getByRole('radio', { name: 'Markdown' })).toBeEnabled()
     expect(loadPreviewMessages).toHaveBeenCalledTimes(1)
 
     await userEvent.click(screen.getByRole('button', { name: '开始导出' }))
@@ -203,7 +207,7 @@ describe('ExportWorkspace multi-chat selection', () => {
     const onStartExport = vi.fn(async () => ({ success: false }))
     renderWorkspace(onStartExport)
 
-    await userEvent.click(screen.getByRole('button', { name: '自定义时间' }))
+    await userEvent.click(screen.getByRole('radio', { name: '自定义时间' }))
     await userEvent.type(screen.getByLabelText('开始时间'), '2026-08-01T09:30')
     await userEvent.type(screen.getByLabelText('结束时间'), '2026-08-02T18:45')
     await userEvent.click(screen.getByRole('button', { name: '选择位置' }))
diff --git a/tests/component/ui-control-states.test.tsx b/tests/component/ui-control-states.test.tsx
index e46532c..ebc5823 100644
--- a/tests/component/ui-control-states.test.tsx
+++ b/tests/component/ui-control-states.test.tsx
@@ -14,6 +14,11 @@ import {
   SelectValue,
   Switch
 } from '../../src/renderer/src/components/ui'
+import { IconButton } from '../../src/renderer/src/components/ui/icon-button'
+import {
+  SegmentedControl,
+  SegmentedControlItem
+} from '../../src/renderer/src/components/ui/segmented-control'
 
 describe('TraceMemo UI control states', () => {
   it('uses the compact, standard, and form control height contract', () => {
@@ -32,6 +37,43 @@ describe('TraceMemo UI control states', () => {
     expect(screen.getByRole('textbox', { name: '表单输入' })).toHaveClass('h-control-form')
   })
 
+  it('keeps secondary and icon actions visually quiet by default', () => {
+    render(
+      <>
+        <Button variant="outline">次要操作</Button>
+        <IconButton label="刷新" tooltip="">
+          ↻
+        </IconButton>
+      </>
+    )
+
+    expect(screen.getByRole('button', { name: '次要操作' })).toHaveClass(
+      'border-border-subtle',
+      'bg-transparent'
+    )
+    expect(screen.getByRole('button', { name: '刷新' })).toHaveClass(
+      'text-foreground',
+      'hover:bg-accent'
+    )
+    expect(screen.getByRole('button', { name: '刷新' })).not.toHaveClass('bg-primary')
+  })
+
+  it('uses a surface-free selected contract for segmented choices', () => {
+    render(
+      <SegmentedControl aria-label="模式" defaultValue="one">
+        <SegmentedControlItem value="one">一</SegmentedControlItem>
+        <SegmentedControlItem value="two">二</SegmentedControlItem>
+      </SegmentedControl>
+    )
+
+    const selected = screen.getByRole('radio', { name: '一' })
+    expect(selected).toHaveClass(
+      'data-[state=checked]:bg-accent',
+      'data-[state=checked]:font-semibold'
+    )
+    expect(selected).not.toHaveClass('data-[state=checked]:shadow-surface')
+  })
+
   it('keeps disabled controls readable without the old opacity and surface shadow', () => {
     render(
       <>
diff --git a/tests/e2e/app.spec.ts b/tests/e2e/app.spec.ts
index b78cbf5..ea1ce38 100644
--- a/tests/e2e/app.spec.ts
+++ b/tests/e2e/app.spec.ts
@@ -631,8 +631,11 @@ test('EXPORT-01 multi-chat selection stays local to export and forces HTML', asy
     await contactList.getByRole('button', { name: /产品测试群/ }).click()
 
     await expect(fixture.page.getByText('已选 2 / 5 个')).toBeVisible()
-    await expect(fixture.page.getByRole('button', { name: 'CSV' })).toBeDisabled()
-    await expect(fixture.page.getByRole('button', { name: /HTML/ })).toHaveClass(/active/)
+    await expect(fixture.page.getByRole('radio', { name: 'CSV' })).toBeDisabled()
+    const htmlFormat = fixture.page
+      .getByRole('radiogroup', { name: '导出格式' })
+      .getByRole('radio', { name: /HTML/ })
+    await expect(htmlFormat).toBeChecked()
     await expect(fixture.page.getByText('文件传输助手、产品测试群 · 共 2 个聊天')).toBeVisible()
     await expect(
       fixture.page.locator('.export-preview-bubble').filter({ hasText: '这是一条脱敏测试消息' })
@@ -663,7 +666,9 @@ test('EXPORT-02 large contact list stays bounded and searchable', async () => {
 
     const compositeButtons = [
       fixture.page.getByRole('button', { name: /^全部导出/ }),
-      fixture.page.getByRole('button', { name: /HTML/ }),
+      fixture.page
+        .getByRole('radiogroup', { name: '导出格式' })
+        .getByRole('radio', { name: /HTML/ }),
       fixture.page.locator('.export-workspace > aside:first-child > button:last-child')
     ]
     for (const button of compositeButtons) {