diff --git a/client/lib/widgets/account_screens.dart b/client/lib/widgets/account_screens.dart
index db444f7..acfb74a 100644
--- a/client/lib/widgets/account_screens.dart
+++ b/client/lib/widgets/account_screens.dart
@@ -9,6 +9,7 @@ import '../l10n/app_text.dart';
 import '../models/device.dart';
 import '../pangolin_theme.dart';
 import '../services/device_identity.dart';
+import 'adaptive_menu.dart';
 import '../services/auth_api.dart';
 import '../state/account_providers.dart';
 import 'pangolin_button.dart';
@@ -215,50 +216,45 @@ class DevicesScreen extends ConsumerWidget {
   }
 
   // 本机:只给「重命名」(自我踢下线/清除没意义);其他设备:重命名+强制退出+清除。
-  Widget _menu(BuildContext context, WidgetRef ref, PangolinScheme c, Device d, bool isLocal) => PopupMenuButton<String>(
-        icon: Icon(PangolinIcons.moreVertical, size: 18, color: c.fg3),
-        color: c.surface,
-        shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(PangolinRadius.md), side: BorderSide(color: c.border)),
-        itemBuilder: (_) => [
-          PopupMenuItem(value: 'rename', child: Row(children: [
-            Icon(PangolinIcons.edit, size: 16, color: c.fg2), const SizedBox(width: 10),
-            Text(t.devRename, style: PangolinText.sm.copyWith(color: c.fg1)),
-          ])),
-          if (!isLocal) ...[
-            PopupMenuItem(value: 'logout', child: Row(children: [
-              Icon(PangolinIcons.logOut, size: 16, color: c.fg2), const SizedBox(width: 10),
-              Text(t.devForceLogout, style: PangolinText.sm.copyWith(color: c.fg1)),
-            ])),
-            PopupMenuItem(value: 'clear', child: Row(children: [
-              Icon(PangolinIcons.trash, size: 16, color: c.danger), const SizedBox(width: 10),
-              Text(t.devClearLogin, style: PangolinText.sm.copyWith(color: c.danger)),
-            ])),
-          ],
-        ],
-        onSelected: (v) async {
-          if (v == 'rename') {
+  // 用 AdaptiveMenuButton:菜单按屏幕位置自动上/下弹、不遮挡 ⋯ 按钮。
+  Widget _menu(BuildContext context, WidgetRef ref, PangolinScheme c, Device d, bool isLocal) {
+    Future<void> confirmAction({required bool isClear}) async {
+      final label = isClear ? t.devClearLogin : t.devForceLogout;
+      final shown = d.name.isNotEmpty ? d.name : d.platformKind.label;
+      final ok = await _confirm(context, c,
+          title: '$label「$shown」',
+          body: isClear ? t.devClearLoginConfirm : t.devForceLogoutConfirm,
+          action: label);
+      if (!ok) return;
+      final n = ref.read(devicesProvider.notifier);
+      if (isClear) {
+        await n.remove(d.uuid);
+      } else {
+        await n.forceLogout(d.uuid);
+      }
+    }
+
+    return AdaptiveMenuButton(
+      icon: PangolinIcons.moreVertical,
+      iconColor: c.fg3,
+      items: [
+        AdaptiveMenuItem(
+          icon: PangolinIcons.edit,
+          label: t.devRename,
+          onSelected: () async {
             final newName = await _renameDialog(context, c, d);
             if (newName != null && newName.trim().isNotEmpty) {
               await ref.read(devicesProvider.notifier).rename(d.uuid, newName.trim());
             }
-            return;
-          }
-          final isClear = v == 'clear';
-          final label = isClear ? t.devClearLogin : t.devForceLogout;
-          final shown = d.name.isNotEmpty ? d.name : d.platformKind.label;
-          final ok = await _confirm(context, c,
-              title: '$label「$shown」',
-              body: isClear ? t.devClearLoginConfirm : t.devForceLogoutConfirm,
-              action: label);
-          if (!ok) return;
-          final n = ref.read(devicesProvider.notifier);
-          if (isClear) {
-            await n.remove(d.uuid);
-          } else {
-            await n.forceLogout(d.uuid);
-          }
-        },
-      );
+          },
+        ),
+        if (!isLocal) ...[
+          AdaptiveMenuItem(icon: PangolinIcons.logOut, label: t.devForceLogout, onSelected: () => confirmAction(isClear: false)),
+          AdaptiveMenuItem(icon: PangolinIcons.trash, label: t.devClearLogin, danger: true, onSelected: () => confirmAction(isClear: true)),
+        ],
+      ],
+    );
+  }
 
   // 危险操作二次确认弹窗(走 token 配色)。
   Future<bool> _confirm(BuildContext context, PangolinScheme c,
diff --git a/client/lib/widgets/adaptive_menu.dart b/client/lib/widgets/adaptive_menu.dart
new file mode 100644
index 0000000..678389d
--- /dev/null
+++ b/client/lib/widgets/adaptive_menu.dart
@@ -0,0 +1,202 @@
+// adaptive_menu.dart — 自适应方向的弹出菜单(通用组件)。
+//
+// 行为:点触发按钮后,根据按钮在屏幕的位置自动决定菜单**向下**还是**向上**弹
+// (下方空间够就向下,不够就向上;都不够取较大一侧),且**始终留间隙、不遮挡触发
+// 按钮本身**。水平方向菜单右缘对齐按钮右缘并夹在屏内。点菜单外区域关闭。
+//
+// 用 Overlay 自绘(而非 PopupMenuButton——后者不保证翻转、可能盖住按钮)。
+import 'package:flutter/material.dart';
+
+import '../pangolin_theme.dart';
+
+/// 一个菜单项。danger=true 用危险色(如删除)。
+class AdaptiveMenuItem {
+  const AdaptiveMenuItem({
+    required this.icon,
+    required this.label,
+    required this.onSelected,
+    this.danger = false,
+  });
+
+  final IconData icon;
+  final String label;
+  final VoidCallback onSelected;
+  final bool danger;
+}
+
+/// 触发按钮(图标)+ 自适应弹出菜单。
+class AdaptiveMenuButton extends StatefulWidget {
+  const AdaptiveMenuButton({
+    super.key,
+    required this.items,
+    required this.icon,
+    this.iconColor,
+    this.iconSize = 18,
+    this.menuWidth = 208,
+    this.itemHeight = 44,
+  });
+
+  final List<AdaptiveMenuItem> items;
+  final IconData icon;
+  final Color? iconColor;
+  final double iconSize;
+  final double menuWidth;
+  final double itemHeight;
+
+  @override
+  State<AdaptiveMenuButton> createState() => _AdaptiveMenuButtonState();
+}
+
+class _AdaptiveMenuButtonState extends State<AdaptiveMenuButton> {
+  final _anchorKey = GlobalKey();
+  OverlayEntry? _entry;
+
+  @override
+  void dispose() {
+    _close();
+    super.dispose();
+  }
+
+  void _close() {
+    _entry?.remove();
+    _entry = null;
+  }
+
+  void _open() {
+    if (widget.items.isEmpty) return;
+    final box = _anchorKey.currentContext?.findRenderObject() as RenderBox?;
+    final overlay = Overlay.of(context);
+    final overlayBox = overlay.context.findRenderObject() as RenderBox?;
+    if (box == null || overlayBox == null) return;
+
+    final topLeft = box.localToGlobal(Offset.zero, ancestor: overlayBox);
+    final size = box.size;
+    final screen = overlayBox.size;
+    final safe = MediaQuery.of(context).padding;
+
+    const gap = 6.0;
+    final menuH = widget.items.length * widget.itemHeight + 10;
+    final triggerTop = topLeft.dy;
+    final triggerBottom = topLeft.dy + size.height;
+
+    final spaceBelow = screen.height - safe.bottom - 8 - triggerBottom;
+    final spaceAbove = triggerTop - safe.top - 8;
+    // 下方放得下就向下;否则若下方比上方大也向下;否则向上。
+    final openDown = spaceBelow >= menuH + gap || spaceBelow >= spaceAbove;
+
+    // 水平:菜单右缘对齐按钮右缘,夹在屏内。
+    final maxLeft = (screen.width - widget.menuWidth - 8).clamp(8.0, double.infinity);
+    final left = (topLeft.dx + size.width - widget.menuWidth).clamp(8.0, maxLeft);
+
+    // 垂直:向下→按钮底+gap(不遮挡);向上→按钮顶-gap-菜单高(不遮挡)。
+    final top = openDown
+        ? triggerBottom + gap
+        : (triggerTop - gap - menuH).clamp(safe.top + 8, double.infinity);
+
+    final c = context.pangolin;
+    _entry = OverlayEntry(
+      builder: (_) => Stack(children: [
+        Positioned.fill(
+          child: GestureDetector(behavior: HitTestBehavior.translucent, onTap: _close),
+        ),
+        Positioned(
+          left: left,
+          top: top,
+          width: widget.menuWidth,
+          child: _MenuCard(
+            scheme: c,
+            items: widget.items,
+            itemHeight: widget.itemHeight,
+            fromTop: openDown,
+            onPick: (it) {
+              _close();
+              it.onSelected();
+            },
+          ),
+        ),
+      ]),
+    );
+    overlay.insert(_entry!);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final c = context.pangolin;
+    return InkResponse(
+      key: _anchorKey,
+      radius: 22,
+      onTap: _open,
+      child: Padding(
+        padding: const EdgeInsets.all(6),
+        child: Icon(widget.icon, size: widget.iconSize, color: widget.iconColor ?? c.fg3),
+      ),
+    );
+  }
+}
+
+class _MenuCard extends StatelessWidget {
+  const _MenuCard({
+    required this.scheme,
+    required this.items,
+    required this.itemHeight,
+    required this.fromTop,
+    required this.onPick,
+  });
+
+  final PangolinScheme scheme;
+  final List<AdaptiveMenuItem> items;
+  final double itemHeight;
+  final bool fromTop; // 向下弹时从顶部展开,向上弹时从底部展开
+  final ValueChanged<AdaptiveMenuItem> onPick;
+
+  @override
+  Widget build(BuildContext context) {
+    final c = scheme;
+    return TweenAnimationBuilder<double>(
+      duration: const Duration(milliseconds: 130),
+      curve: Curves.easeOutCubic,
+      tween: Tween(begin: 0, end: 1),
+      builder: (_, v, child) => Opacity(
+        opacity: v.clamp(0.0, 1.0),
+        child: Transform.scale(
+          scale: 0.96 + 0.04 * v,
+          alignment: fromTop ? Alignment.topRight : Alignment.bottomRight,
+          child: child,
+        ),
+      ),
+      child: Material(
+        color: c.surface,
+        elevation: 6,
+        shadowColor: Colors.black26,
+        clipBehavior: Clip.antiAlias,
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(PangolinRadius.md),
+          side: BorderSide(color: c.border),
+        ),
+        child: Column(
+          mainAxisSize: MainAxisSize.min,
+          children: [
+            const SizedBox(height: 5),
+            for (final it in items)
+              InkWell(
+                onTap: () => onPick(it),
+                child: SizedBox(
+                  height: itemHeight,
+                  child: Padding(
+                    padding: const EdgeInsets.symmetric(horizontal: 14),
+                    child: Row(children: [
+                      Icon(it.icon, size: 16, color: it.danger ? c.danger : c.fg2),
+                      const SizedBox(width: 11),
+                      Text(it.label,
+                          style: PangolinText.sm.copyWith(color: it.danger ? c.danger : c.fg1)),
+                    ]),
+                  ),
+                ),
+              ),
+            const SizedBox(height: 5),
+          ],
+        ),
+      ),
+    );
+  }
+}
diff --git a/client/test/widget/devices_screen_test.dart b/client/test/widget/devices_screen_test.dart
index 97541de..52f691d 100644
--- a/client/test/widget/devices_screen_test.dart
+++ b/client/test/widget/devices_screen_test.dart
@@ -14,6 +14,7 @@ import 'package:pangolin_vpn/services/token_store.dart';
 import 'package:pangolin_vpn/state/account_providers.dart';
 import 'package:pangolin_vpn/state/auth_provider.dart';
 import 'package:pangolin_vpn/widgets/account_screens.dart';
+import 'package:pangolin_vpn/widgets/adaptive_menu.dart';
 
 import '../helpers/harness.dart';
 
@@ -95,7 +96,7 @@ void main() {
   testWidgets('本机 ⋯ 菜单只有「重命名」,无强制退出/清除', (tester) async {
     await pump(tester);
     // 第一个菜单 = 本机(MacBook Pro)。
-    await tester.tap(find.byType(PopupMenuButton<String>).first);
+    await tester.tap(find.byType(AdaptiveMenuButton).first);
     await tester.pumpAndSettle();
     expect(find.text(t.devRename), findsOneWidget);
     expect(find.text(t.devForceLogout), findsNothing);
@@ -105,8 +106,8 @@ void main() {
   testWidgets('非本机行 ⋯ 菜单 → 强制退出 → 确认 → 调 logout 接口', (tester) async {
     await pump(tester);
     // 本机+手机各一个菜单;手机(最后一个)才有强制退出/清除。
-    expect(find.byType(PopupMenuButton<String>), findsNWidgets(2));
-    await tester.tap(find.byType(PopupMenuButton<String>).last);
+    expect(find.byType(AdaptiveMenuButton), findsNWidgets(2));
+    await tester.tap(find.byType(AdaptiveMenuButton).last);
     await tester.pumpAndSettle();
     expect(find.text(t.devForceLogout), findsOneWidget);
     expect(find.text(t.devClearLogin), findsOneWidget);
@@ -124,7 +125,7 @@ void main() {
 
   testWidgets('清除登录信息 → 确认 → 调 DELETE 接口', (tester) async {
     await pump(tester);
-    await tester.tap(find.byType(PopupMenuButton<String>).last);
+    await tester.tap(find.byType(AdaptiveMenuButton).last);
     await tester.pumpAndSettle();
     await tester.tap(find.text(t.devClearLogin));
     await tester.pumpAndSettle();
@@ -136,7 +137,7 @@ void main() {
 
   testWidgets('重命名 → 输入新名 → 保存 → 调 rename 接口', (tester) async {
     await pump(tester);
-    await tester.tap(find.byType(PopupMenuButton<String>).last);
+    await tester.tap(find.byType(AdaptiveMenuButton).last);
     await tester.pumpAndSettle();
     await tester.tap(find.text(t.devRename));
     await tester.pumpAndSettle();