diff --git a/client/lib/core/responsive/form_factor.dart b/client/lib/core/responsive/form_factor.dart
index 159519f..519db44 100644
--- a/client/lib/core/responsive/form_factor.dart
+++ b/client/lib/core/responsive/form_factor.dart
@@ -20,11 +20,15 @@ bool get _isDesktopPlatform {
 }
 
 extension FormFactorContext on BuildContext {
-  /// 当前形态。桌面平台(macOS/Win/Linux)且宽≥680 → desktop；触屏/Web 宽≥600 → tablet；否则 mobile。
+  /// 当前形态。桌面平台(macOS/Win/Linux)且宽≥680 → desktop；触屏/Web 宽≥900 → tablet；否则 mobile。
+  ///
+  /// tablet 阈值 900 对齐 iPad 设计源(design/ui_kits/tablet：1180×820 横屏侧栏布局，
+  /// README 定「宽 ≥900 才从底部 Tab 切侧栏」)：iPad 横屏/大屏(12.9″竖屏)→ 侧栏 tablet；
+  /// 小 iPad 竖屏(≤834)→ 回落 mobile 底 Tab，避免双栏在窄屏挤压。
   FormFactor get formFactor {
     final w = MediaQuery.sizeOf(this).width;
     if (_isDesktopPlatform) return w >= 680 ? FormFactor.desktop : FormFactor.mobile;
-    if (w >= 600) return FormFactor.tablet;
+    if (w >= 900) return FormFactor.tablet;
     return FormFactor.mobile;
   }
 
diff --git a/client/test/golden/goldens/tablet_account_dark_zh.png b/client/test/golden/goldens/tablet_account_dark_zh.png
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diff --git a/client/test/golden/goldens/tablet_account_light_en.png b/client/test/golden/goldens/tablet_account_light_en.png
new file mode 100644
index 0000000..5f1c625
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diff --git a/client/test/golden/goldens/tablet_account_light_zh.png b/client/test/golden/goldens/tablet_account_light_zh.png
new file mode 100644
index 0000000..9e4d63e
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diff --git a/client/test/golden/goldens/tablet_connect_dark_zh.png b/client/test/golden/goldens/tablet_connect_dark_zh.png
new file mode 100644
index 0000000..6b870e1
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diff --git a/client/test/golden/goldens/tablet_connect_light_en.png b/client/test/golden/goldens/tablet_connect_light_en.png
new file mode 100644
index 0000000..acb7b69
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diff --git a/client/test/golden/goldens/tablet_connect_light_zh.png b/client/test/golden/goldens/tablet_connect_light_zh.png
new file mode 100644
index 0000000..6bd9ad7
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diff --git a/client/test/golden/goldens/tablet_servers_dark_zh.png b/client/test/golden/goldens/tablet_servers_dark_zh.png
new file mode 100644
index 0000000..d02ac27
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diff --git a/client/test/golden/goldens/tablet_servers_light_en.png b/client/test/golden/goldens/tablet_servers_light_en.png
new file mode 100644
index 0000000..e944598
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diff --git a/client/test/golden/goldens/tablet_servers_light_zh.png b/client/test/golden/goldens/tablet_servers_light_zh.png
new file mode 100644
index 0000000..845f807
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diff --git a/client/test/golden/goldens/tablet_stats_dark_zh.png b/client/test/golden/goldens/tablet_stats_dark_zh.png
new file mode 100644
index 0000000..000337c
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diff --git a/client/test/golden/goldens/tablet_stats_light_en.png b/client/test/golden/goldens/tablet_stats_light_en.png
new file mode 100644
index 0000000..aaf6215
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diff --git a/client/test/golden/goldens/tablet_stats_light_zh.png b/client/test/golden/goldens/tablet_stats_light_zh.png
new file mode 100644
index 0000000..d3833e6
Binary files /dev/null and b/client/test/golden/goldens/tablet_stats_light_zh.png differ
diff --git a/client/test/golden/tablet_pages_golden_test.dart b/client/test/golden/tablet_pages_golden_test.dart
new file mode 100644
index 0000000..a0a6399
--- /dev/null
+++ b/client/test/golden/tablet_pages_golden_test.dart
@@ -0,0 +1,153 @@
+// tablet_pages_golden_test.dart — iPad/tablet 整页 golden（连接/节点/统计/账户）
+//
+// 用 debugDefaultTargetPlatformOverride=iOS + 1180×820 surface 让 context.formFactor
+// 判定为 tablet（宽 ≥900），渲染 TabletShell 各页，对照 design/ui_kits/tablet/tabapp.jsx
+// 像素基准做保真校准 / 回归闸。注入演示数据(节点/用量/账户)让网格与柱图有内容；
+// 覆盖矩阵 = 四视图 × {light,dark} × {zh,en}。生成基准：flutter test --update-goldens。
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:pangolin_vpn/bridge/vpn_bridge_mock.dart';
+import 'package:pangolin_vpn/bridge/vpn_bridge_provider.dart';
+import 'package:pangolin_vpn/l10n/app_text.dart';
+import 'package:pangolin_vpn/models/me.dart';
+import 'package:pangolin_vpn/models/node.dart';
+import 'package:pangolin_vpn/models/usage_point.dart';
+import 'package:pangolin_vpn/pangolin_theme.dart';
+import 'package:pangolin_vpn/services/token_store.dart';
+import 'package:pangolin_vpn/shell/home_shell.dart';
+import 'package:pangolin_vpn/shell/tablet_shell.dart';
+import 'package:pangolin_vpn/state/account_providers.dart';
+import 'package:pangolin_vpn/state/app_providers.dart';
+import 'package:pangolin_vpn/state/auth_provider.dart';
+import 'package:pangolin_vpn/state/navigation_provider.dart';
+import 'package:pangolin_vpn/state/nodes_provider.dart';
+
+class _NullTokenStore implements TokenStore {
+  const _NullTokenStore();
+  @override
+  Future<void> saveTokens({required String access, required String refresh}) async {}
+  @override
+  Future<String?> loadAccessToken() async => null;
+  @override
+  Future<String?> loadRefreshToken() async => null;
+  @override
+  Future<void> clear() async {}
+  @override
+  Future<void> markOnboarded() async {}
+  @override
+  Future<bool> isOnboarded() async => true;
+  @override
+  Future<void> saveLastEmail(String email) async {}
+  @override
+  Future<String?> loadLastEmail() async => null;
+}
+
+// ── 演示数据（让网格/柱图/账户有内容；不依赖登录态与网络）─────────────
+const List<Node> _demoNodes = [
+  Node(code: 'HK', nameZh: '香港 · 流媒体', nameEn: 'Hong Kong', ping: 18, tag: NodeTag.streaming, host: 'hk', port: 443),
+  Node(code: 'TW', nameZh: '台北', nameEn: 'Taipei', ping: 28, host: 'tw', port: 443),
+  Node(code: 'JP', nameZh: '东京', nameEn: 'Tokyo', ping: 32, host: 'jp', port: 443),
+  Node(code: 'KR', nameZh: '首尔', nameEn: 'Seoul', ping: 38, host: 'kr', port: 443),
+  Node(code: 'SG', nameZh: '新加坡', nameEn: 'Singapore', ping: 45, tag: NodeTag.p2p, host: 'sg', port: 443),
+  Node(code: 'US', nameZh: '洛杉矶', nameEn: 'Los Angeles', ping: 120, host: 'us', port: 443),
+];
+
+const Me _demoMe = Me(
+  email: 'me@pangolin.vpn',
+  plan: 'free',
+  devicesUsed: 2,
+  devicesMax: 1,
+  quotaTodayMin: 6,
+  dataTodayGb: 1.2,
+  weeklyGb: [2.1, 3.4, 1.8, 4.6, 5.2, 6.1, 3.0],
+);
+
+final List<UsagePoint> _demoUsage = List.generate(30, (i) {
+  return UsagePoint(
+    date: '2026-06-${(i + 1).toString().padLeft(2, '0')}',
+    bytesUp: 120 * 1024 * 1024 + i * 7 * 1024 * 1024,
+    bytesDown: 900 * 1024 * 1024 + i * 31 * 1024 * 1024,
+    minutesUsed: 24 + (i % 5) * 11,
+  );
+});
+
+class _FakeNodesNotifier extends NodesNotifier {
+  @override
+  Future<List<Node>> build() async => _demoNodes;
+}
+
+class _FakeMeNotifier extends MeNotifier {
+  @override
+  Future<Me> build() async => _demoMe;
+}
+
+const Size _ipad = Size(1180, 820); // 对齐设计源 tabapp.jsx 内屏
+
+Future<void> _shoot(
+  WidgetTester tester,
+  NavView view,
+  String name, {
+  bool settle = true,
+  Brightness brightness = Brightness.light,
+  AppLang lang = AppLang.zh,
+}) async {
+  debugDefaultTargetPlatformOverride = TargetPlatform.iOS;
+  tester.view.physicalSize = _ipad;
+  tester.view.devicePixelRatio = 1.0;
+  addTearDown(tester.view.resetPhysicalSize);
+  addTearDown(tester.view.resetDevicePixelRatio);
+  try {
+    await tester.pumpWidget(ProviderScope(
+      overrides: [
+        tokenStoreProvider.overrideWithValue(const _NullTokenStore()),
+        vpnBridgeProvider.overrideWithValue(VpnBridgeMock()),
+        navViewProvider.overrideWith((ref) => view),
+        localeProvider.overrideWith((ref) => lang),
+        nodesProvider.overrideWith(_FakeNodesNotifier.new),
+        meProvider.overrideWith(_FakeMeNotifier.new),
+        usageProvider(30).overrideWith((ref) async => _demoUsage),
+      ],
+      child: MaterialApp(
+        debugShowCheckedModeBanner: false,
+        theme: brightness == Brightness.dark ? PangolinTheme.dark : PangolinTheme.light,
+        home: const HomeShell(),
+      ),
+    ));
+    if (settle) {
+      await tester.pumpAndSettle();
+    } else {
+      await tester.pump();
+      await tester.pump(const Duration(milliseconds: 300));
+    }
+    await expectLater(find.byType(TabletShell), matchesGoldenFile('goldens/$name.png'));
+  } finally {
+    debugDefaultTargetPlatformOverride = null;
+  }
+}
+
+void main() {
+  // 连接页 off 态含连接键虚线环静态，但稳妥起见用 settle:false（pump 固定帧）。
+  for (final lang in const [AppLang.zh, AppLang.en]) {
+    final l = lang == AppLang.zh ? 'zh' : 'en';
+    testWidgets('tablet 连接·light·$l',
+        (t) => _shoot(t, NavView.connect, 'tablet_connect_light_$l', settle: false, lang: lang));
+    testWidgets('tablet 节点·light·$l',
+        (t) => _shoot(t, NavView.servers, 'tablet_servers_light_$l', lang: lang));
+    testWidgets('tablet 统计·light·$l',
+        (t) => _shoot(t, NavView.stats, 'tablet_stats_light_$l', lang: lang));
+    testWidgets('tablet 账户·light·$l',
+        (t) => _shoot(t, NavView.account, 'tablet_account_light_$l', lang: lang));
+  }
+
+  // 深色覆盖（中文，验证暗主题各视图）。
+  testWidgets('tablet 连接·dark·zh',
+      (t) => _shoot(t, NavView.connect, 'tablet_connect_dark_zh', settle: false, brightness: Brightness.dark));
+  testWidgets('tablet 节点·dark·zh',
+      (t) => _shoot(t, NavView.servers, 'tablet_servers_dark_zh', brightness: Brightness.dark));
+  testWidgets('tablet 统计·dark·zh',
+      (t) => _shoot(t, NavView.stats, 'tablet_stats_dark_zh', brightness: Brightness.dark));
+  testWidgets('tablet 账户·dark·zh',
+      (t) => _shoot(t, NavView.account, 'tablet_account_dark_zh', brightness: Brightness.dark));
+}
diff --git a/client/test/responsive/form_factor_test.dart b/client/test/responsive/form_factor_test.dart
index 987a3e3..f456277 100644
--- a/client/test/responsive/form_factor_test.dart
+++ b/client/test/responsive/form_factor_test.dart
@@ -15,12 +15,23 @@ Future<FormFactor> _ffAt(WidgetTester tester, Size size) async {
 }
 
 void main() {
-  testWidgets('iPad 竖屏(768) → tablet', (t) async {
-    expect(await _ffAt(t, const Size(768, 1024)), FormFactor.tablet);
-  });
+  // tablet 阈值 ≥900，对齐 iPad 设计源(横屏侧栏布局)。
   testWidgets('iPad 横屏(1024) → tablet', (t) async {
     expect(await _ffAt(t, const Size(1024, 768)), FormFactor.tablet);
   });
+  testWidgets('iPad 12.9″ 竖屏(1024) → tablet', (t) async {
+    expect(await _ffAt(t, const Size(1024, 1366)), FormFactor.tablet);
+  });
+  testWidgets('iPad 11″ 竖屏(834) → mobile(窄屏回落底 Tab)', (t) async {
+    expect(await _ffAt(t, const Size(834, 1194)), FormFactor.mobile);
+  });
+  testWidgets('iPad 标准竖屏(768) → mobile', (t) async {
+    expect(await _ffAt(t, const Size(768, 1024)), FormFactor.mobile);
+  });
+  testWidgets('断点边界:900 → tablet, 899 → mobile', (t) async {
+    expect(await _ffAt(t, const Size(900, 1200)), FormFactor.tablet);
+    expect(await _ffAt(t, const Size(899, 1200)), FormFactor.mobile);
+  });
   testWidgets('iPhone(390) → mobile', (t) async {
     expect(await _ffAt(t, const Size(390, 844)), FormFactor.mobile);
   });
diff --git a/design/CONTRACT.md b/design/CONTRACT.md
new file mode 100644
index 0000000..b17df3d
--- /dev/null
+++ b/design/CONTRACT.md
@@ -0,0 +1,81 @@
+# 设计契约 · iPad / Tablet（design-distill）
+
+> 像素基准：`design/ui_kits/tablet/tabapp.jsx`（1180×820 横屏侧栏布局）+ `index.html`。
+> 数值取自原型源码，非目测。token 单源：`design/colors_and_type.css` → `client/lib/pangolin_tokens.gen.dart`（勿手改）。
+> 目标实现：`client/lib/shell/tablet_shell.dart` + 四页 `isWide` 分支 + `client/lib/widgets/`。
+> 验收闸：`client/test/golden/tablet_pages_golden_test.dart`（1180×820 / iOS 平台 → formFactor=tablet）。
+
+## 0. 归一化产物
+- 类型 A（结构化包）：token 单源已存在、codegen 已接（`design/codegen/gen_flutter_tokens.mjs`）。本契约只补 **tablet 页面像素规格 + 验收清单**。
+- 断点：触屏宽 **≥900 → tablet 侧栏**，否则 mobile 底 Tab（`client/lib/core/responsive/form_factor.dart`，对齐 README「≥900 切侧栏」）。
+
+## 1. token 映射（复用既有语义层）
+| 原型 CSS var | Flutter 语义层 |
+|---|---|
+| `--bg` / `--bg-subtle` | `c.bg` / `c.bgSubtle` |
+| `--surface` | `c.surface` |
+| `--fg1/2/3` | `c.fg1/fg2/fg3` |
+| `--accent` / `--accent-subtle` / `--accent-border` | `c.accent` / `c.accentSubtle` / `c.accentBorder` |
+| `--success` `--warning` | `c.success` `c.warning` |
+| `--border` / `--border-strong` | `c.border` / `c.borderStrong` |
+| `--radius-{sm,md,lg,xl,full}` | `PangolinRadius.{sm,md,lg,xl,full}` |
+| `--shadow-{sm,md,lg}` | `PangolinShadow.{sm,md,lg}` |
+| `--font-{display,sans,mono}` | `PangolinText.{h*/body...}` / `PangolinText.mono` |
+
+## 2. 组件映射
+| 原型 | Flutter | 状态 |
+|---|---|---|
+| `TabRail` 侧栏 | `TabletShell` + `widgets/nav_sidebar.dart` | 已接，宽 232、行高≥48 |
+| 连接键三态 | `widgets/connect_button.dart` | 复用（off 态 canonical 走「虚线轨道环」，见 design/CLAUDE.md §5，优先于原型实心环简化） |
+| 免费额度卡 | `widgets/quota_card.dart` | 复用 |
+| 智能选择卡 | `widgets/smart_select_card.dart` | 复用 |
+| 节点行 | `widgets/server_tile.dart` / `nodes_page` `_NodeGridTile` | 双列网格 |
+| 指标卡 | `stats_page` `_MetricCard` | 复用 |
+| 段控/开关/行 | `account_page` 内组件 | 复用 |
+
+## 3. 页面像素规格（取自 tabapp.jsx）
+
+### 外壳 TabletApp
+- 内屏 1180×820，`data-theme` 切明暗。侧栏 + 内容列（顶栏 56 + 主体）。
+- 内容顶栏：高 56，padding `0 28`，标题 `font-display 700 / 19 / fg1`，右侧连接状态（mono 12.5，on=success「● {code}」/ off=fg3「○」）。
+
+### TabRail 侧栏
+- 宽 232，`bg-subtle`，右 1px `border`，padding `18 14 16`。
+- 品牌头：Mark 30 + 「穿山甲」(display 700/17) + 「PANGOLIN」(9/600/字距0.2em/accent)，gap 10，padding `0 8 20`。
+- 导航项：gap 4；每项 padding `13 14`、radius md、字号 15、active 700+accent+accent-subtle 底 / inactive 500+fg2、**minHeight 48**、图标 20（active stroke 2.4）、gap 12。
+- 底部套餐徽章：free=surface+border / pro=`linear-gradient(150deg,clay-600,clay-800)`+白字；radius lg，padding `12 13`；头像圈 32 + 名(12.5/700) + 邮箱(10.5/opacity.65)。
+
+### 连接视图 TabConnect（双栏）
+- 左列 flex **1.25**，居中，gap 26：按钮 216×216 圆、`box-shadow 0 0 0 11px {ring}, shadow-lg`、图标 60、label mono 700/14/字距0.08em；下方 caption(16/600/fg2)，on 态计时 mono 28/fg1。
+- 右列宽 **332**，gap 14，垂直居中，paddingRight 28：
+  - 免费额度卡(card padding `14 16`)：clock + 「今日剩余 {n} 分钟」+ 「免费版」pill + 进度条(高6，≤3 变 warning) + 看广告按钮(accent-subtle/accent-border/full/minHeight44)。
+  - 当前节点卡(padding `13 15`, minHeight 48)：CC 码块 + 「当前节点」(11/600/fg3) + 名(15/600) + 副(12/fg3) + chevron。
+  - on 态速率行：3 卡(下载/上传/延迟)，各 padding `11 13`、值 mono 16。
+
+### 节点视图 TabNodes
+- padding `6 28 24`，overflow auto。
+- 智能卡：accent-subtle 底、border(active=accent)、radius xl、padding `15 16`、minHeight 56、marginBottom 14；zap 在 clay 渐变盒 42×42 + 「智能选择」(15.5/700) + 「推荐」pill + 副(12/fg2) + active check。
+- 搜索框：bg-subtle、radius md、padding `11 14`、maxWidth 380、marginBottom 14。
+- 网格：**2 列 `1fr 1fr`，gap 11**；每格 padding `13 15`、minHeight 56、active=accent-subtle+accent-border：CC + 名(14.5/600) + 副 + ping(mono 12) + Signal + active check。
+
+### 统计视图 TabStats
+- padding `6 28 24`。
+- 3 指标卡一行，gap 14，marginBottom 20；各 padding `18 20`：label(12.5/fg3/600) + 值(mono 26/fg1)。
+- 周柱卡 padding `20 22`：标题(13.5/600) + 7 柱(gap 22, 容器高150, 柱 maxWidth 40, accent opacity .85, radius `6 6 0 0`) + 值(mono 10.5) + 星期(11.5)。
+
+### 账户视图 TabAccount
+- padding `6 28 24`，maxWidth 640（生产页功能更丰富，沿用同设计语言：套餐横幅 + 分区卡 + 行 + 段控/开关）。
+- 套餐横幅 radius xl padding 20；行 minHeight 48，图标盒 34 radius sm accent-subtle；TabToggle 48×29(on=accent)。
+
+## 4. 逐屏验收清单（每屏 × 明/暗 × 中/英）
+- [ ] 连接 / 节点 / 统计 / 账户 四视图 × light/dark × zh/en：无溢出、侧栏 232 比例正确、触控目标 ≥48。
+- [ ] 连接页双栏左右比例 ≈ 1.25 : 332；on 态速率行 3 卡出现。
+- [ ] 节点页 2 列网格 + 置顶智能卡；搜索框 maxWidth 380。
+- [ ] 颜色全部语义 token、无硬编码 hex（design/CLAUDE.md §1）。
+- [ ] 文案无红线词（§13）、双语单显不并排。
+- [ ] golden 回归闸 `tablet_pages_golden_test.dart` 通过；真机/模拟器 mini/11″/12.9″ 横竖屏目测过。
+
+## 5. 已知差异（记录，非缺陷）
+- 连接键 off 态：原型用实心 11px 环，Flutter 用「虚线轨道环」(design/CLAUDE.md §5 canonical 连接键)，以 §5 为准。
+- 账户页：生产实现比原型多设备管理/兑换/联系/协议行，属真实功能扩展，沿用同设计语言。
+- golden 测试环境未打包 Noto Sans SC → CJK 显示为方块，仅影响 golden 文字、不影响真机；布局可判。节点网格/周柱在未登录测试态无数据（需注入演示数据方显内容）。