diff --git a/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx b/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx
index aead87c..a246a7d 100644
--- a/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx
+++ b/vscode/webview-ui/src/components/ManagedSessionsPanel.tsx
@@ -12,6 +12,8 @@ import type { ManagedSession, ManagedSessionsData } from '../types'
 import { Download, Plus, Terminal, Trash2, X } from 'lucide-react'
 import { useCallback, useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
 
+import { SelectMenu } from './ui/select-menu'
+
 interface ManagedSessionsPanelProps {
   data: ManagedSessionsData
   profiles: ClaudeProfile[]
@@ -143,18 +145,15 @@ export function ManagedSessionsPanel({
         <div className="flex flex-col gap-2">
           <div className="flex items-center gap-2">
             <span className="w-12 shrink-0 text-xs text-[var(--vscode-descriptionForeground)]">Profile</span>
-            <select
+            <SelectMenu
               value={selectedProfile}
-              onChange={e => setSelectedProfile(e.target.value)}
-              className="min-w-0 flex-1 rounded border border-[var(--vscode-input-border,var(--vscode-panel-border))] bg-[var(--vscode-input-background)] px-2 py-1 text-xs text-[var(--vscode-input-foreground)] outline-none focus:ring-1 focus:ring-inset focus:ring-[var(--vscode-focusBorder)]"
-            >
-              {profiles.length === 0 && (
-                <option value="">（无可用 profile）</option>
-              )}
-              {profiles.map(p => (
-                <option key={p.path} value={p.path}>{p.name}</option>
-              ))}
-            </select>
+              onChange={setSelectedProfile}
+              options={profiles.length === 0
+                ? [{ value: '', label: '（无可用 profile）' }]
+                : profiles.map(p => ({ value: p.path, label: p.name }))}
+              variant="input"
+              className="min-w-0 flex-1"
+            />
           </div>
           <div className="flex items-center gap-2">
             <span className="w-12 shrink-0 text-xs text-[var(--vscode-descriptionForeground)]">名字</span>
@@ -385,24 +384,18 @@ function SessionRow({ session, profiles, onRename, onResume, onDelete, onCloseTa
                         <span className="truncate">{basename(session.profilePath)}</span>
                       )
                     : (
-                        <select
+                        <SelectMenu
                           value={pickedProfile}
+                          onChange={setUserPicked}
                           title="换 profile 后点行打开；已打开的终端下次才生效"
-                          onClick={e => e.stopPropagation()}
-                          onMouseDown={e => e.stopPropagation()}
-                          onChange={(e) => {
-                            e.stopPropagation()
-                            setUserPicked(e.target.value)
-                          }}
-                          className="min-w-0 bg-transparent py-0 pr-1 text-[10px] text-[var(--vscode-descriptionForeground)] outline-none focus:ring-1 focus:ring-inset focus:ring-[var(--vscode-focusBorder)]"
-                        >
-                          {storedMissing && (
-                            <option value={pickedProfile}>{basename(pickedProfile) || '（未设置）'}</option>
-                          )}
-                          {profiles.map(p => (
-                            <option key={p.path} value={p.path}>{p.name}</option>
-                          ))}
-                        </select>
+                          variant="ghost"
+                          options={[
+                            ...(storedMissing
+                              ? [{ value: pickedProfile, label: basename(pickedProfile) || '（未设置）' }]
+                              : []),
+                            ...profiles.map(p => ({ value: p.path, label: p.name })),
+                          ]}
+                        />
                       )}
                   {created ? <span className="shrink-0">{(profiles.length > 0 || Boolean(basename(session.profilePath))) ? ' · ' : ''}{created}</span> : null}
                 </span>
diff --git a/vscode/webview-ui/src/components/SettingsModal.tsx b/vscode/webview-ui/src/components/SettingsModal.tsx
index 728394b..fe22601 100644
--- a/vscode/webview-ui/src/components/SettingsModal.tsx
+++ b/vscode/webview-ui/src/components/SettingsModal.tsx
@@ -11,6 +11,7 @@ import type { ReactElement } from 'react'
 import type { ClaudeProfile } from '../hooks/useIssues'
 import { X } from 'lucide-react'
 import { useEffect, useState } from 'react'
+import { SelectMenu } from './ui/select-menu'
 
 type GroupKey = 'auth' | 'network' | 'youtrack' | 'prompts' | 'hooks'
 
@@ -487,22 +488,20 @@ export function SettingsModal({
                     </>
                   )}
                 >
-                  <select
+                  <SelectMenu
                     value={conflictResolutionProfilePath}
-                    onChange={e => setConflictResolutionProfilePath(e.target.value)}
+                    onChange={setConflictResolutionProfilePath}
+                    variant="input"
                     className={inputClass}
-                  >
-                    <option value="">（默认）</option>
-                    {profiles.map(p => (
-                      <option key={p.path} value={p.path}>{p.name}</option>
-                    ))}
-                    {conflictResolutionProfilePath
-                      && !profiles.some(p => p.path === conflictResolutionProfilePath) && (
-                      <option value={conflictResolutionProfilePath}>
-                        {`自定义：${conflictResolutionProfilePath}`}
-                      </option>
-                    )}
-                  </select>
+                    options={[
+                      { value: '', label: '（默认）' },
+                      ...profiles.map(p => ({ value: p.path, label: p.name })),
+                      ...(conflictResolutionProfilePath
+                        && !profiles.some(p => p.path === conflictResolutionProfilePath)
+                        ? [{ value: conflictResolutionProfilePath, label: `自定义：${conflictResolutionProfilePath}` }]
+                        : []),
+                    ]}
+                  />
                 </Field>
 
                 <Field
@@ -513,22 +512,20 @@ export function SettingsModal({
                     </>
                   )}
                 >
-                  <select
+                  <SelectMenu
                     value={commitProfilePath}
-                    onChange={e => setCommitProfilePath(e.target.value)}
+                    onChange={setCommitProfilePath}
+                    variant="input"
                     className={inputClass}
-                  >
-                    <option value="">（未配置）</option>
-                    {profiles.map(p => (
-                      <option key={p.path} value={p.path}>{p.name}</option>
-                    ))}
-                    {commitProfilePath
-                      && !profiles.some(p => p.path === commitProfilePath) && (
-                      <option value={commitProfilePath}>
-                        {`自定义：${commitProfilePath}`}
-                      </option>
-                    )}
-                  </select>
+                    options={[
+                      { value: '', label: '（未配置）' },
+                      ...profiles.map(p => ({ value: p.path, label: p.name })),
+                      ...(commitProfilePath
+                        && !profiles.some(p => p.path === commitProfilePath)
+                        ? [{ value: commitProfilePath, label: `自定义：${commitProfilePath}` }]
+                        : []),
+                    ]}
+                  />
                 </Field>
 
                 <Field
@@ -728,20 +725,19 @@ export function SettingsModal({
                     </button>
                   </div>
                   {youtrackProjects.status === 'ready' && youtrackProjects.projects.length > 0 && (
-                    <select
+                    <SelectMenu
                       value={youtrackProjectShortName}
-                      onChange={e => setYoutrackProjectShortName(e.target.value)}
+                      onChange={setYoutrackProjectShortName}
                       className={`${inputClass} mt-2`}
-                    >
-                      <option value="">— 选择项目 —</option>
-                      {youtrackProjects.projects.map(p => (
-                        <option key={p.id} value={p.shortName}>
-                          {p.shortName}
-                          {' · '}
-                          {p.name}
-                        </option>
-                      ))}
-                    </select>
+                      variant="input"
+                      options={[
+                        { value: '', label: '— 选择项目 —' },
+                        ...youtrackProjects.projects.map(p => ({
+                          value: p.shortName,
+                          label: `${p.shortName} · ${p.name}`,
+                        })),
+                      ]}
+                    />
                   )}
                   {youtrackProjects.status === 'error' && (
                     <span className="mt-1 block text-[10px] text-state-red">
@@ -891,14 +887,16 @@ export function SettingsModal({
                     </>
                   )}
                 >
-                  <select
+                  <SelectMenu
                     value={worktreeOpenWith}
-                    onChange={e => setWorktreeOpenWith(e.target.value as 'vscode' | 'pycharm')}
+                    onChange={v => setWorktreeOpenWith(v as 'vscode' | 'pycharm')}
                     className={inputClass}
-                  >
-                    <option value="vscode">VS Code</option>
-                    <option value="pycharm">PyCharm</option>
-                  </select>
+                    variant="input"
+                    options={[
+                      { value: 'vscode', label: 'VS Code' },
+                      { value: 'pycharm', label: 'PyCharm' },
+                    ]}
+                  />
                 </Field>
 
                 {worktreeOpenWith === 'pycharm' && (
diff --git a/vscode/webview-ui/src/components/property-grid.tsx b/vscode/webview-ui/src/components/property-grid.tsx
index 2c2679e..3245996 100644
--- a/vscode/webview-ui/src/components/property-grid.tsx
+++ b/vscode/webview-ui/src/components/property-grid.tsx
@@ -9,7 +9,6 @@
  * 背景色，依赖 VS Code 主题 CSS 变量。
  */
 
-import { useEffect, useMemo, useRef, useState } from 'react'
 import type { ReactNode } from 'react'
 import {
   ChevronDown,
@@ -24,6 +23,8 @@ import {
   Search,
   Settings,
 } from 'lucide-react'
+import { useEffect, useMemo, useRef, useState } from 'react'
+import { SelectMenu } from './ui/select-menu'
 
 // --- 类型定义 ---
 
@@ -193,22 +194,16 @@ function PropertyRow({
           )
         }
         return (
-          <select
+          <SelectMenu
             value={String(value ?? '')}
-            onChange={e => onChange(propDef.key, e.target.value)}
-            className={`${inputClass} appearance-none`}
-            style={{ backgroundColor: 'var(--vscode-dropdown-background)', color: 'var(--vscode-dropdown-foreground)' }}
-          >
-            {(propDef.options ?? []).map(o => (
-              <option
-                key={String(o.value)}
-                value={String(o.value)}
-                style={{ backgroundColor: 'var(--vscode-dropdown-background)', color: 'var(--vscode-dropdown-foreground)' }}
-              >
-                {o.label}
-              </option>
-            ))}
-          </select>
+            onChange={v => onChange(propDef.key, v)}
+            className={inputClass}
+            variant="input"
+            options={(propDef.options ?? []).map(o => ({
+              value: String(o.value),
+              label: o.label,
+            }))}
+          />
         )
 
       case 'multiline':
diff --git a/vscode/webview-ui/src/components/ui/select-menu.tsx b/vscode/webview-ui/src/components/ui/select-menu.tsx
new file mode 100644
index 0000000..ccb022c
--- /dev/null
+++ b/vscode/webview-ui/src/components/ui/select-menu.tsx
@@ -0,0 +1,256 @@
+import type { KeyboardEvent, MouseEvent, ReactElement } from 'react'
+import { Check, ChevronDown } from 'lucide-react'
+import { useCallback, useEffect, useLayoutEffect, useRef, useState } from 'react'
+import { createPortal } from 'react-dom'
+import { cn } from '@/lib/utils'
+
+export interface SelectMenuOption {
+  value: string
+  label: string
+  hint?: string
+}
+
+export interface SelectMenuProps {
+  value: string
+  options: SelectMenuOption[]
+  onChange: (value: string) => void
+  placeholder?: string
+  title?: string
+  disabled?: boolean
+  variant?: 'input' | 'ghost'
+  className?: string
+}
+
+const MAX_MENU_HEIGHT = 240
+
+/**
+ * 自定义下拉组件，替代原生 select。
+ *
+ * 原生 select 的展开弹层是 Chromium 系统层，VS Code 暗色主题下样式脱节，
+ * 这里用手写弹层 + createPortal 渲染到 body，避免被 overflow 容器裁掉。
+ */
+export function SelectMenu({
+  value,
+  options,
+  onChange,
+  placeholder = '请选择',
+  title,
+  disabled = false,
+  variant = 'input',
+  className,
+}: SelectMenuProps): ReactElement {
+  const [open, setOpen] = useState(false)
+  const [highlight, setHighlight] = useState(-1)
+  const [pos, setPos] = useState<{ top: number, left: number, width: number } | null>(null)
+  const triggerRef = useRef<HTMLButtonElement | null>(null)
+  const menuRef = useRef<HTMLDivElement | null>(null)
+  const optionRefs = useRef<Array<HTMLButtonElement | null>>([])
+
+  const selected = options.find(o => o.value === value) ?? null
+
+  const computePos = useCallback((): void => {
+    const el = triggerRef.current
+    if (!el)
+      return
+    const rect = el.getBoundingClientRect()
+    const menuHeight = Math.min(options.length * 32, MAX_MENU_HEIGHT)
+    const spaceBelow = window.innerHeight - rect.bottom
+    const spaceAbove = rect.top
+    const openUp = spaceBelow < menuHeight && spaceAbove > spaceBelow
+    setPos({
+      top: openUp ? Math.max(8, rect.top - menuHeight - 4) : rect.bottom + 4,
+      left: rect.left,
+      width: Math.max(rect.width, 120),
+    })
+  }, [options.length])
+
+  const openMenu = useCallback((): void => {
+    computePos()
+    setOpen(true)
+    setHighlight(options.findIndex(o => o.value === value))
+  }, [computePos, options, value])
+
+  const closeMenu = useCallback((): void => {
+    setOpen(false)
+    setHighlight(-1)
+  }, [])
+
+  const selectOption = useCallback((index: number): void => {
+    const opt = options[index]
+    if (opt)
+      onChange(opt.value)
+    closeMenu()
+  }, [options, onChange, closeMenu])
+
+  const moveHighlight = useCallback((dir: 1 | -1): void => {
+    if (options.length === 0)
+      return
+    setHighlight((prev) => {
+      if (prev < 0)
+        return dir === 1 ? 0 : options.length - 1
+      return (prev + dir + options.length) % options.length
+    })
+  }, [options.length])
+
+  // 弹层打开时把高亮项滚进视野（初始定位 + 键盘移动都靠它）。
+  useLayoutEffect(() => {
+    if (!open)
+      return
+    const el = optionRefs.current[highlight]
+    el?.scrollIntoView({ block: 'nearest' })
+  }, [open, highlight])
+
+  // 外点击关闭：mousedown 捕获阶段，落在触发器/弹层内不关。
+  useEffect(() => {
+    if (!open)
+      return
+    function onPointerDown(e: globalThis.MouseEvent): void {
+      const t = e.target
+      if (t instanceof Node && !triggerRef.current?.contains(t) && !menuRef.current?.contains(t))
+        setOpen(false)
+    }
+    document.addEventListener('mousedown', onPointerDown, true)
+    return () => document.removeEventListener('mousedown', onPointerDown, true)
+  }, [open])
+
+  // 窗口 resize / 容器滚动时重算位置，让弹层始终贴住触发器。
+  useEffect(() => {
+    if (!open)
+      return
+    function onScroll(): void {
+      computePos()
+    }
+    window.addEventListener('resize', onScroll)
+    document.addEventListener('scroll', onScroll, true)
+    return () => {
+      window.removeEventListener('resize', onScroll)
+      document.removeEventListener('scroll', onScroll, true)
+    }
+  }, [open, computePos])
+
+  function onTriggerClick(e: MouseEvent<HTMLButtonElement>): void {
+    e.stopPropagation()
+    if (disabled)
+      return
+    if (open)
+      closeMenu()
+    else
+      openMenu()
+  }
+
+  function onTriggerMouseDown(e: MouseEvent): void {
+    e.stopPropagation()
+  }
+
+  function onTriggerKeyDown(e: KeyboardEvent<HTMLButtonElement>): void {
+    if (disabled)
+      return
+    const key = e.key
+    if (!open) {
+      if (key === 'ArrowDown' || key === 'ArrowUp' || key === 'Enter' || key === ' ') {
+        e.preventDefault()
+        openMenu()
+      }
+      return
+    }
+    switch (key) {
+      case 'ArrowDown':
+        e.preventDefault()
+        e.stopPropagation()
+        moveHighlight(1)
+        break
+      case 'ArrowUp':
+        e.preventDefault()
+        e.stopPropagation()
+        moveHighlight(-1)
+        break
+      case 'Enter':
+      case ' ':
+        e.preventDefault()
+        e.stopPropagation()
+        if (highlight >= 0)
+          selectOption(highlight)
+        break
+      case 'Escape':
+        e.preventDefault()
+        e.stopPropagation()
+        closeMenu()
+        break
+    }
+  }
+
+  const triggerClasses
+    = variant === 'input'
+      ? 'rounded border border-[var(--vscode-input-border,var(--vscode-panel-border))] bg-[var(--vscode-input-background)] px-2 py-1 text-xs text-[var(--vscode-input-foreground)] focus:ring-1 focus:ring-inset focus:ring-[var(--vscode-focusBorder)]'
+      : 'rounded bg-transparent px-1 py-0 text-[10px] text-[var(--vscode-descriptionForeground)] hover:bg-[var(--vscode-toolbar-hoverBackground)]'
+
+  return (
+    <>
+      <button
+        ref={triggerRef}
+        type="button"
+        disabled={disabled}
+        title={title}
+        aria-haspopup="listbox"
+        aria-expanded={open}
+        onClick={onTriggerClick}
+        onMouseDown={onTriggerMouseDown}
+        onKeyDown={onTriggerKeyDown}
+        className={cn(
+          'flex min-w-0 items-center justify-between gap-1',
+          triggerClasses,
+          className,
+        )}
+      >
+        <span className={cn('min-w-0 truncate', selected ? '' : 'opacity-50')}>
+          {selected?.label ?? placeholder}
+        </span>
+        <ChevronDown className={cn('size-3.5 shrink-0', variant === 'ghost' && 'size-3')} />
+      </button>
+      {open && pos && createPortal(
+        <div
+          ref={menuRef}
+          role="listbox"
+          tabIndex={-1}
+          className="fixed z-50 overflow-auto rounded border border-[var(--vscode-panel-border)] bg-[var(--vscode-editorWidget-background,var(--vscode-editor-background))] shadow-md"
+          style={{ top: pos.top, left: pos.left, width: pos.width, maxHeight: MAX_MENU_HEIGHT }}
+        >
+          {options.length === 0
+            ? (
+                <div className="px-2 py-3 text-center text-xs text-[var(--vscode-descriptionForeground)]">
+                  无选项
+                </div>
+              )
+            : options.map((opt, i) => (
+                <button
+                  key={opt.value}
+                  ref={(el) => { optionRefs.current[i] = el }}
+                  type="button"
+                  role="option"
+                  aria-selected={opt.value === value}
+                  onClick={(e) => {
+                    e.stopPropagation()
+                    selectOption(i)
+                  }}
+                  className={cn(
+                    'flex w-full items-center gap-1.5 px-2 py-1 text-left text-xs',
+                    i === highlight
+                      ? 'bg-[var(--vscode-list-activeSelectionBackground)] text-[var(--vscode-list-activeSelectionForeground)]'
+                      : 'text-[var(--vscode-foreground)] hover:bg-[var(--vscode-list-hoverBackground)]',
+                  )}
+                >
+                  <span className={cn('grid size-3.5 shrink-0 place-items-center', opt.value === value ? 'opacity-100' : 'opacity-0')}>
+                    <Check className="size-3.5" />
+                  </span>
+                  <span className="flex min-w-0 flex-col">
+                    <span className="truncate">{opt.label}</span>
+                    {opt.hint && <span className="truncate text-[10px] opacity-70">{opt.hint}</span>}
+                  </span>
+                </button>
+              ))}
+        </div>,
+        document.body,
+      )}
+    </>
+  )
+}