diff --git a/flutter_monisuo/lib/ui/pages/asset/asset_page.dart b/flutter_monisuo/lib/ui/pages/asset/asset_page.dart
index e0f03b1..4f6dcc5 100644
--- a/flutter_monisuo/lib/ui/pages/asset/asset_page.dart
+++ b/flutter_monisuo/lib/ui/pages/asset/asset_page.dart
@@ -3,6 +3,8 @@ import 'package:flutter/services.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:provider/provider.dart';
 import '../../../core/constants/app_colors.dart';
+import '../../../core/theme/app_color_scheme.dart';
+import '../../../core/theme/app_spacing.dart';
 import '../../../providers/asset_provider.dart';
 import '../../shared/ui_constants.dart';
 import '../orders/fund_orders_page.dart';
@@ -45,17 +47,17 @@ class _AssetPageState extends State<AssetPage> with AutomaticKeepAliveClientMixi
             color: theme.colorScheme.primary,
             child: SingleChildScrollView(
               physics: const AlwaysScrollableScrollPhysics(),
-              padding: const EdgeInsets.all(16),
+              padding: AppSpacing.pagePadding,
               child: Column(
                 children: [
                   _AssetCard(overview: provider.overview),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _TabSelector(
                     tabs: const ['资金账户', '交易账户'],
                     selectedIndex: _activeTab,
                     onChanged: (index) => setState(() => _activeTab = index),
                   ),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _activeTab == 0
                       ? _FundAccountCard(provider: provider)
                       : _TradeAccountCard(holdings: provider.holdings),
@@ -81,14 +83,14 @@ class _AssetCard extends StatelessWidget {
 
     return Container(
       width: double.infinity,
-      padding: const EdgeInsets.all(24),
+      padding: EdgeInsets.all(AppSpacing.lg),
       decoration: BoxDecoration(
         gradient: const LinearGradient(
           colors: AppColors.gradientColors,
           begin: Alignment.topLeft,
           end: Alignment.bottomRight,
         ),
-        borderRadius: BorderRadius.circular(20),
+        borderRadius: BorderRadius.circular(AppRadius.xl),
       ),
       child: Column(
         children: [
@@ -96,7 +98,7 @@ class _AssetCard extends StatelessWidget {
             '总资产估值(USDT)',
             style: theme.textTheme.small.copyWith(color: Colors.white70),
           ),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           Text(
             overview?.totalAsset ?? '0.00',
             style: theme.textTheme.h1.copyWith(
@@ -104,12 +106,12 @@ class _AssetCard extends StatelessWidget {
               color: Colors.white,
             ),
           ),
-          const SizedBox(height: 16),
+          SizedBox(height: AppSpacing.md),
           Row(
             mainAxisAlignment: MainAxisAlignment.center,
             children: [
               Icon(LucideIcons.trendingUp, color: Colors.white70, size: 16),
-              const SizedBox(width: 4),
+              SizedBox(width: AppSpacing.xs),
               Text(
                 '总盈亏: ${overview?.totalProfit ?? '0.00'} USDT',
                 style: theme.textTheme.small.copyWith(color: Colors.white70),
@@ -139,10 +141,10 @@ class _TabSelector extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return Container(
-      padding: const EdgeInsets.all(4),
+      padding: EdgeInsets.all(AppSpacing.xs),
       decoration: BoxDecoration(
         color: theme.colorScheme.card,
-        borderRadius: BorderRadius.circular(12),
+        borderRadius: BorderRadius.circular(AppRadius.lg),
       ),
       child: Row(
         children: tabs.asMap().entries.map((entry) {
@@ -154,10 +156,10 @@ class _TabSelector extends StatelessWidget {
             child: GestureDetector(
               onTap: () => onChanged(index),
               child: Container(
-                padding: const EdgeInsets.symmetric(vertical: 12),
+                padding: EdgeInsets.symmetric(vertical: AppSpacing.sm + AppSpacing.xs),
                 decoration: BoxDecoration(
                   color: isSelected ? theme.colorScheme.primary : Colors.transparent,
-                  borderRadius: BorderRadius.circular(8),
+                  borderRadius: BorderRadius.circular(AppRadius.md),
                 ),
                 child: Center(
                   child: Text(
@@ -189,7 +191,7 @@ class _FundAccountCard extends StatelessWidget {
     final fund = provider.fundAccount;
 
     return ShadCard(
-      padding: const EdgeInsets.all(20),
+      padding: EdgeInsets.all(AppSpacing.lg + AppSpacing.xs),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
@@ -211,15 +213,15 @@ class _FundAccountCard extends StatelessWidget {
               ),
             ],
           ),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           Text(fund?.balance ?? '0.00', style: theme.textTheme.h2.copyWith(fontWeight: FontWeight.bold)),
-          const SizedBox(height: 24),
+          SizedBox(height: AppSpacing.lg),
           Row(
             children: [
-              Expanded(child: _ActionButton(label: '充值', icon: LucideIcons.plus, color: AppColors.deposit, onTap: () => _showDepositDialog(context))),
-              const SizedBox(width: 12),
-              Expanded(child: _ActionButton(label: '提现', icon: LucideIcons.minus, color: AppColors.withdraw, onTap: () => _showWithdrawDialog(context, fund?.balance))),
-              const SizedBox(width: 12),
+              Expanded(child: _ActionButton(label: '充值', icon: LucideIcons.plus, color: AppColorScheme.success, onTap: () => _showDepositDialog(context))),
+              SizedBox(width: AppSpacing.sm + AppSpacing.xs),
+              Expanded(child: _ActionButton(label: '提现', icon: LucideIcons.minus, color: AppColorScheme.warning, onTap: () => _showWithdrawDialog(context, fund?.balance))),
+              SizedBox(width: AppSpacing.sm + AppSpacing.xs),
               Expanded(child: _ActionButton.outline(label: '划转', icon: LucideIcons.arrowRightLeft, onTap: () => _showTransferDialog(context))),
             ],
           ),
@@ -256,7 +258,7 @@ class _ActionButton extends StatelessWidget {
       mainAxisAlignment: MainAxisAlignment.center,
       children: [
         Icon(icon, size: 18, color: isOutline ? null : Colors.white),
-        const SizedBox(width: 4),
+        SizedBox(width: AppSpacing.xs),
         Text(label),
       ],
     );
@@ -278,12 +280,12 @@ class _TradeAccountCard extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return ShadCard(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.cardPadding,
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text('持仓列表', style: theme.textTheme.large.copyWith(fontWeight: FontWeight.bold)),
-          const SizedBox(height: 16),
+          SizedBox(height: AppSpacing.md),
           if (holdings.isEmpty)
             const _EmptyState(icon: LucideIcons.wallet, message: '暂无持仓')
           else
@@ -313,11 +315,11 @@ class _EmptyState extends StatelessWidget {
 
     return Center(
       child: Padding(
-        padding: const EdgeInsets.all(32),
+        padding: EdgeInsets.all(AppSpacing.xl),
         child: Column(
           children: [
             Icon(icon, size: 48, color: theme.colorScheme.mutedForeground),
-            const SizedBox(height: 12),
+            SizedBox(height: AppSpacing.sm + AppSpacing.xs),
             Text(message, style: theme.textTheme.muted),
           ],
         ),
@@ -337,7 +339,7 @@ class _HoldingItem extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return Padding(
-      padding: const EdgeInsets.symmetric(vertical: 8),
+      padding: EdgeInsets.symmetric(vertical: AppSpacing.sm),
       child: Row(
         children: [
           CircleAvatar(
@@ -348,7 +350,7 @@ class _HoldingItem extends StatelessWidget {
               style: TextStyle(color: theme.colorScheme.primary, fontWeight: FontWeight.bold),
             ),
           ),
-          const SizedBox(width: 12),
+          SizedBox(width: AppSpacing.sm + AppSpacing.xs),
           Expanded(
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
@@ -365,7 +367,7 @@ class _HoldingItem extends StatelessWidget {
               Text(
                 holding.formattedProfitRate,
                 style: TextStyle(
-                  color: holding.isProfit ? AppColors.up : AppColors.down,
+                  color: holding.isProfit ? AppColorScheme.up : AppColorScheme.down,
                   fontSize: 12,
                 ),
               ),
@@ -434,13 +436,13 @@ void _showDepositResultDialog(BuildContext context, Map<String, dynamic> data) {
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text('订单号: $orderNo', style: const TextStyle(fontSize: 12)),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           Text('充值金额: $amount USDT', style: const TextStyle(fontWeight: FontWeight.bold)),
-          const SizedBox(height: 16),
+          SizedBox(height: AppSpacing.md),
           const Text('请向以下地址转账:', style: TextStyle(fontSize: 12)),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           _WalletAddressCard(address: walletAddress, network: walletNetwork),
-          const SizedBox(height: 12),
+          SizedBox(height: AppSpacing.sm + AppSpacing.xs),
           const Text('转账完成后请点击"已打款"按钮确认', style: TextStyle(fontSize: 12, color: Colors.orange)),
         ],
       ),
@@ -474,10 +476,10 @@ class _WalletAddressCard extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return Container(
-      padding: const EdgeInsets.all(12),
+      padding: EdgeInsets.all(AppSpacing.sm + AppSpacing.xs),
       decoration: BoxDecoration(
         color: Colors.grey[100],
-        borderRadius: BorderRadius.circular(8),
+        borderRadius: BorderRadius.circular(AppRadius.md),
       ),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
@@ -499,7 +501,7 @@ class _WalletAddressCard extends StatelessWidget {
               ),
             ],
           ),
-          const SizedBox(height: 4),
+          SizedBox(height: AppSpacing.xs),
           Text('网络: $network', style: const TextStyle(fontSize: 12, color: Colors.grey)),
         ],
       ),
@@ -526,7 +528,7 @@ void _showWithdrawDialog(BuildContext context, String? balance) {
             children: [
               if (balance != null)
                 Padding(
-                  padding: const EdgeInsets.only(bottom: 12),
+                  padding: EdgeInsets.only(bottom: AppSpacing.sm + AppSpacing.xs),
                   child: Text('可用余额: $balance USDT', style: const TextStyle(color: Colors.grey)),
                 ),
               ShadInputFormField(
@@ -536,14 +538,14 @@ void _showWithdrawDialog(BuildContext context, String? balance) {
                 keyboardType: const TextInputType.numberWithOptions(decimal: true),
                 validator: Validators.amount,
               ),
-              const SizedBox(height: 12),
+              SizedBox(height: AppSpacing.sm + AppSpacing.xs),
               ShadInputFormField(
                 id: 'address',
                 controller: addressController,
                 placeholder: const Text('请输入提现地址'),
                 validator: (v) => Validators.required(v, '提现地址'),
               ),
-              const SizedBox(height: 12),
+              SizedBox(height: AppSpacing.sm + AppSpacing.xs),
               ShadInputFormField(
                 id: 'contact',
                 controller: contactController,
@@ -593,7 +595,7 @@ void _showTransferDialog(BuildContext context) {
         child: Column(
           mainAxisSize: MainAxisSize.min,
           children: [
-            const SizedBox(height: 8),
+            SizedBox(height: AppSpacing.sm),
             Row(
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
@@ -602,7 +604,7 @@ void _showTransferDialog(BuildContext context) {
                   isSelected: direction == 1,
                   onTap: () => setState(() => direction = 1),
                 ),
-                const SizedBox(width: 8),
+                SizedBox(width: AppSpacing.sm),
                 _DirectionButton(
                   label: '交易→资金',
                   isSelected: direction == 2,
@@ -610,7 +612,7 @@ void _showTransferDialog(BuildContext context) {
                 ),
               ],
             ),
-            const SizedBox(height: 16),
+            SizedBox(height: AppSpacing.md),
             ShadForm(
               key: formKey,
               child: ShadInputFormField(
@@ -661,7 +663,7 @@ class _DirectionButton extends StatelessWidget {
       child: Row(
         children: [
           if (isSelected) const Icon(LucideIcons.check, size: 14) else const SizedBox(width: 14),
-          const SizedBox(width: 4),
+          SizedBox(width: AppSpacing.xs),
           Text(label),
         ],
       ),
diff --git a/flutter_monisuo/lib/ui/pages/auth/login_page.dart b/flutter_monisuo/lib/ui/pages/auth/login_page.dart
index b88fe22..cc2aa68 100644
--- a/flutter_monisuo/lib/ui/pages/auth/login_page.dart
+++ b/flutter_monisuo/lib/ui/pages/auth/login_page.dart
@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:provider/provider.dart';
 
+import '../../../core/theme/app_spacing.dart';
 import '../../../providers/auth_provider.dart';
 import '../main/main_page.dart';
 import 'register_page.dart';
@@ -29,7 +30,7 @@ class _LoginPageState extends State<LoginPage> {
         child: ConstrainedBox(
           constraints: const BoxConstraints(maxWidth: _maxFormWidth),
           child: Padding(
-            padding: const EdgeInsets.all(24),
+            padding: EdgeInsets.all(AppSpacing.lg),
             child: ShadForm(
               key: formKey,
               child: Column(
@@ -37,13 +38,13 @@ class _LoginPageState extends State<LoginPage> {
                 crossAxisAlignment: CrossAxisAlignment.stretch,
                 children: [
                   _buildHeader(theme),
-                  const SizedBox(height: 48),
+                  SizedBox(height: AppSpacing.xxl),
                   _buildUsernameField(),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _buildPasswordField(),
-                  const SizedBox(height: 24),
+                  SizedBox(height: AppSpacing.lg),
                   _buildLoginButton(),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _buildRegisterLink(theme),
                 ],
               ),
@@ -62,13 +63,13 @@ class _LoginPageState extends State<LoginPage> {
           size: _logoSize,
           color: theme.colorScheme.primary,
         ),
-        const SizedBox(height: 24),
+        SizedBox(height: AppSpacing.lg),
         Text(
           '模拟所',
           style: theme.textTheme.h1,
           textAlign: TextAlign.center,
         ),
-        const SizedBox(height: 8),
+        SizedBox(height: AppSpacing.sm),
         Text(
           '虚拟货币模拟交易平台',
           style: theme.textTheme.muted,
diff --git a/flutter_monisuo/lib/ui/pages/home/home_page.dart b/flutter_monisuo/lib/ui/pages/home/home_page.dart
index 34caf67..c42f151 100644
--- a/flutter_monisuo/lib/ui/pages/home/home_page.dart
+++ b/flutter_monisuo/lib/ui/pages/home/home_page.dart
@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:provider/provider.dart';
 import '../../../core/constants/app_colors.dart';
+import '../../../core/theme/app_color_scheme.dart';
+import '../../../core/theme/app_spacing.dart';
 import '../../../providers/asset_provider.dart';
 import '../../../providers/auth_provider.dart';
 import '../../shared/ui_constants.dart';
@@ -44,22 +46,22 @@ class _HomePageState extends State<HomePage> with AutomaticKeepAliveClientMixin
             color: theme.colorScheme.primary,
             child: SingleChildScrollView(
               physics: const AlwaysScrollableScrollPhysics(),
-              padding: const EdgeInsets.all(16),
+              padding: AppSpacing.pagePadding,
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-                  const SizedBox(height: 8),
+                  SizedBox(height: AppSpacing.sm),
                   _Header(),
-                  const SizedBox(height: 20),
+                  SizedBox(height: AppSpacing.lg + AppSpacing.sm),
                   _AssetOverviewCard(overview: provider.overview),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _QuickActions(
                     onDeposit: _showDeposit,
                     onWithdraw: _showWithdraw,
                     onTransfer: _showTransfer,
                     onTrade: _navigateToTrade,
                   ),
-                  const SizedBox(height: 24),
+                  SizedBox(height: AppSpacing.lg),
                   _HoldingsList(holdings: provider.holdings),
                 ],
               ),
@@ -96,14 +98,14 @@ class _HomePageState extends State<HomePage> with AutomaticKeepAliveClientMixin
                 keyboardType: const TextInputType.numberWithOptions(decimal: true),
                 validator: Validators.amount,
               ),
-              const SizedBox(height: 12),
+              SizedBox(height: AppSpacing.sm + AppSpacing.xs),
               ShadInputFormField(
                 id: 'address',
                 placeholder: const Text('请输入提现地址'),
                 controller: addressController,
                 validator: (v) => Validators.required(v, '提现地址'),
               ),
-              const SizedBox(height: 12),
+              SizedBox(height: AppSpacing.sm + AppSpacing.xs),
               ShadInputFormField(
                 id: 'contact',
                 placeholder: const Text('联系方式(可选)'),
@@ -187,7 +189,7 @@ class _Header extends StatelessWidget {
         return Row(
           children: [
             _Avatar(text: user?.avatarText),
-            const SizedBox(width: 12),
+            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
             Expanded(
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
@@ -196,7 +198,7 @@ class _Header extends StatelessWidget {
                     '你好，${user?.username ?? '用户'}',
                     style: theme.textTheme.large.copyWith(fontWeight: FontWeight.bold),
                   ),
-                  const SizedBox(height: 2),
+                  SizedBox(height: AppSpacing.xs),
                   Text('欢迎来到模拟所', style: theme.textTheme.muted),
                 ],
               ),
@@ -241,25 +243,25 @@ class _AssetOverviewCard extends StatelessWidget {
 
     return Container(
       width: double.infinity,
-      padding: const EdgeInsets.all(20),
+      padding: EdgeInsets.all(AppSpacing.lg + AppSpacing.sm),
       decoration: BoxDecoration(
         gradient: const LinearGradient(
           colors: AppColors.gradientColors,
           begin: Alignment.topLeft,
           end: Alignment.bottomRight,
         ),
-        borderRadius: BorderRadius.circular(16),
+        borderRadius: BorderRadius.circular(AppRadius.xl),
       ),
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
           Text('总资产(USDT)', style: theme.textTheme.small.copyWith(color: Colors.white70)),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           Text(
             overview?.totalAsset ?? '0.00',
             style: theme.textTheme.h2.copyWith(color: Colors.white, fontWeight: FontWeight.bold),
           ),
-          const SizedBox(height: 20),
+          SizedBox(height: AppSpacing.lg + AppSpacing.sm),
           Row(
             mainAxisAlignment: MainAxisAlignment.spaceBetween,
             children: [
@@ -286,7 +288,7 @@ class _AssetItem extends StatelessWidget {
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         Text(label, style: const TextStyle(fontSize: 12, color: Colors.white70)),
-        const SizedBox(height: 4),
+        SizedBox(height: AppSpacing.xs),
         Text(value, style: const TextStyle(fontSize: 18, fontWeight: FontWeight.w600, color: Colors.white)),
       ],
     );
@@ -310,14 +312,14 @@ class _QuickActions extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return ShadCard(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.cardPadding,
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceAround,
         children: [
-          _ActionButton(icon: LucideIcons.arrowDownToLine, text: '充值', color: AppColors.deposit, onTap: onDeposit),
-          _ActionButton(icon: LucideIcons.arrowUpFromLine, text: '提现', color: AppColors.withdraw, onTap: onWithdraw),
-          _ActionButton(icon: LucideIcons.arrowRightLeft, text: '划转', color: AppColors.trade, onTap: onTransfer),
-          _ActionButton(icon: LucideIcons.trendingUp, text: '交易', color: AppColors.trade, onTap: onTrade),
+          _ActionButton(icon: LucideIcons.arrowDownToLine, text: '充值', color: AppColorScheme.success, onTap: onDeposit),
+          _ActionButton(icon: LucideIcons.arrowUpFromLine, text: '提现', color: AppColorScheme.warning, onTap: onWithdraw),
+          _ActionButton(icon: LucideIcons.arrowRightLeft, text: '划转', color: AppColorScheme.info, onTap: onTransfer),
+          _ActionButton(icon: LucideIcons.trendingUp, text: '交易', color: AppColorScheme.info, onTap: onTrade),
         ],
       ),
     ).animate().fadeIn(duration: 500.ms, delay: 100.ms);
@@ -349,10 +351,10 @@ class _ActionButton extends StatelessWidget {
           Container(
             width: 48,
             height: 48,
-            decoration: BoxDecoration(color: color.withOpacity(0.15), shape: BoxShape.circle),
+            decoration: BoxDecoration(color: color.withValues(alpha: 0.15), shape: BoxShape.circle),
             child: Icon(icon, color: color, size: 22),
           ),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           Text(text, style: TextStyle(fontSize: 12, color: theme.colorScheme.foreground)),
         ],
       ),
@@ -371,7 +373,7 @@ class _HoldingsList extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return ShadCard(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.cardPadding,
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.start,
         children: [
@@ -382,7 +384,7 @@ class _HoldingsList extends StatelessWidget {
               Icon(LucideIcons.chevronRight, color: theme.colorScheme.mutedForeground, size: 20),
             ],
           ),
-          const SizedBox(height: 16),
+          SizedBox(height: AppSpacing.md),
           if (holdings.isEmpty)
             _EmptyHoldings()
           else
@@ -401,13 +403,13 @@ class _EmptyHoldings extends StatelessWidget {
 
     return Center(
       child: Padding(
-        padding: const EdgeInsets.all(32),
+        padding: EdgeInsets.all(AppSpacing.xl),
         child: Column(
           children: [
             Icon(LucideIcons.wallet, size: 48, color: theme.colorScheme.mutedForeground),
-            const SizedBox(height: 12),
+            SizedBox(height: AppSpacing.sm + AppSpacing.xs),
             Text('暂无持仓', style: theme.textTheme.muted),
-            const SizedBox(height: 4),
+            SizedBox(height: AppSpacing.xs),
             Text('快去交易吧~', style: theme.textTheme.muted.copyWith(fontSize: 12)),
           ],
         ),
@@ -452,7 +454,7 @@ class _HoldingItem extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return Padding(
-      padding: const EdgeInsets.symmetric(vertical: 8),
+      padding: EdgeInsets.symmetric(vertical: AppSpacing.sm),
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
@@ -466,7 +468,7 @@ class _HoldingItem extends StatelessWidget {
                   style: TextStyle(color: theme.colorScheme.primary, fontWeight: FontWeight.bold),
                 ),
               ),
-              const SizedBox(width: 12),
+              SizedBox(width: AppSpacing.sm + AppSpacing.xs),
               Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
@@ -483,7 +485,7 @@ class _HoldingItem extends StatelessWidget {
               Text(
                 holding.formattedProfitRate,
                 style: TextStyle(
-                  color: holding.isProfit ? AppColors.up : AppColors.down,
+                  color: holding.isProfit ? AppColorScheme.up : AppColorScheme.down,
                   fontSize: 12,
                 ),
               ),
diff --git a/flutter_monisuo/lib/ui/pages/market/market_page.dart b/flutter_monisuo/lib/ui/pages/market/market_page.dart
index 2cf041f..3282420 100644
--- a/flutter_monisuo/lib/ui/pages/market/market_page.dart
+++ b/flutter_monisuo/lib/ui/pages/market/market_page.dart
@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:provider/provider.dart';
 import '../../../core/constants/app_colors.dart';
+import '../../../core/theme/app_color_scheme.dart';
+import '../../../core/theme/app_spacing.dart';
 import '../../../data/models/coin.dart';
 import '../../../providers/market_provider.dart';
 
@@ -60,7 +62,7 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
     final theme = ShadTheme.of(context);
 
     return Padding(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.pagePadding,
       child: ShadInput(
         controller: _searchController,
         placeholder: const Text('搜索币种...'),
@@ -98,7 +100,7 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
 
     return Container(
       height: 44,
-      margin: const EdgeInsets.fromLTRB(16, 0, 16, 16),
+      margin: EdgeInsets.fromLTRB(AppSpacing.md, 0, AppSpacing.md, AppSpacing.md),
       child: Row(
         children: tabs.asMap().entries.map((entry) {
           final index = entry.key;
@@ -108,13 +110,13 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
           return GestureDetector(
             onTap: () => provider.setTab(tab['key']!),
             child: Container(
-              padding: const EdgeInsets.symmetric(horizontal: 20, vertical: 10),
-              margin: const EdgeInsets.only(right: 8),
+              padding: EdgeInsets.symmetric(horizontal: AppSpacing.lg + AppSpacing.xs, vertical: AppSpacing.sm + AppSpacing.xs),
+              margin: EdgeInsets.only(right: AppSpacing.sm),
               decoration: BoxDecoration(
                 color: isActive
                     ? theme.colorScheme.primary
                     : theme.colorScheme.card,
-                borderRadius: BorderRadius.circular(20),
+                borderRadius: BorderRadius.circular(AppRadius.xl),
               ),
               child: Text(
                 tab['label']!,
@@ -153,12 +155,12 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
               size: 48,
               color: theme.colorScheme.destructive,
             ),
-            const SizedBox(height: 12),
+            SizedBox(height: AppSpacing.sm + AppSpacing.xs),
             Text(
               provider.error!,
               style: TextStyle(color: theme.colorScheme.destructive),
             ),
-            const SizedBox(height: 16),
+            SizedBox(height: AppSpacing.md),
             ShadButton(
               onPressed: provider.loadCoins,
               child: const Text('重试'),
@@ -179,7 +181,7 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
               size: 48,
               color: theme.colorScheme.mutedForeground,
             ),
-            const SizedBox(height: 12),
+            SizedBox(height: AppSpacing.sm + AppSpacing.xs),
             Text(
               '暂无数据',
               style: theme.textTheme.muted,
@@ -193,7 +195,7 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
       onRefresh: provider.refresh,
       color: theme.colorScheme.primary,
       child: ListView.builder(
-        padding: const EdgeInsets.fromLTRB(16, 0, 16, 16),
+        padding: EdgeInsets.fromLTRB(AppSpacing.md, 0, AppSpacing.md, AppSpacing.md),
         itemCount: coins.length,
         itemBuilder: (context, index) => _buildCoinItem(coins[index]),
       ),
@@ -204,9 +206,9 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
     final theme = ShadTheme.of(context);
 
     return Padding(
-      padding: const EdgeInsets.only(bottom: 8),
+      padding: EdgeInsets.only(bottom: AppSpacing.sm),
       child: ShadCard(
-        padding: const EdgeInsets.all(16),
+        padding: AppSpacing.cardPadding,
         child: Row(
           children: [
             // 图标
@@ -221,7 +223,7 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
                 ),
               ),
             ),
-            const SizedBox(width: 12),
+            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
             // 名称
             Expanded(
               child: Column(
@@ -242,15 +244,15 @@ class _MarketPageState extends State<MarketPage> with AutomaticKeepAliveClientMi
             ),
             // 涨跌幅
             Container(
-              padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 6),
+              padding: EdgeInsets.symmetric(horizontal: AppSpacing.sm + AppSpacing.xs, vertical: AppSpacing.xs + AppSpacing.xs),
               decoration: BoxDecoration(
-                color: AppColors.getChangeBackgroundColor(coin.isUp),
-                borderRadius: BorderRadius.circular(6),
+                color: getChangeBackgroundColor(coin.isUp),
+                borderRadius: BorderRadius.circular(AppRadius.sm + AppSpacing.xs),
               ),
               child: Text(
                 coin.formattedChange,
                 style: TextStyle(
-                  color: AppColors.getChangeColor(coin.isUp),
+                  color: getChangeColor(coin.isUp),
                   fontWeight: FontWeight.w600,
                 ),
               ),
diff --git a/flutter_monisuo/lib/ui/pages/mine/mine_page.dart b/flutter_monisuo/lib/ui/pages/mine/mine_page.dart
index c8dc9a0..fe455eb 100644
--- a/flutter_monisuo/lib/ui/pages/mine/mine_page.dart
+++ b/flutter_monisuo/lib/ui/pages/mine/mine_page.dart
@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:provider/provider.dart';
+import '../../../core/theme/app_color_scheme.dart';
+import '../../../core/theme/app_spacing.dart';
 import '../../../providers/auth_provider.dart';
 import '../../../providers/theme_provider.dart';
 import '../auth/login_page.dart';
@@ -40,13 +42,13 @@ class _MinePageState extends State<MinePage> with AutomaticKeepAliveClientMixin
       body: Consumer<AuthProvider>(
         builder: (context, auth, _) {
           return SingleChildScrollView(
-            padding: const EdgeInsets.all(16),
+            padding: AppSpacing.pagePadding,
             child: Column(
               children: [
                 _UserCard(user: auth.user),
-                const SizedBox(height: 16),
+                SizedBox(height: AppSpacing.md),
                 _MenuList(onShowComingSoon: _showComingSoon, onShowAbout: _showAboutDialog),
-                const SizedBox(height: 24),
+                SizedBox(height: AppSpacing.lg),
                 _LogoutButton(onLogout: () => _handleLogout(auth)),
               ],
             ),
@@ -60,11 +62,11 @@ class _MinePageState extends State<MinePage> with AutomaticKeepAliveClientMixin
     showShadDialog(
       context: context,
       builder: (context) => ShadDialog.alert(
-        title: const Row(
+        title: Row(
           children: [
-            Icon(LucideIcons.construction, color: Color(0xFFFF9800), size: 20),
-            SizedBox(width: 8),
-            Text('功能开发中'),
+            const Icon(LucideIcons.construction, color: Color(0xFFFF9800), size: 20),
+            SizedBox(width: AppSpacing.sm),
+            const Text('功能开发中'),
           ],
         ),
         description: Text('$feature功能正在开发中，敬请期待~'),
@@ -87,7 +89,7 @@ class _MinePageState extends State<MinePage> with AutomaticKeepAliveClientMixin
         title: Row(
           children: [
             _AppLogo(radius: 20, fontSize: 20),
-            const SizedBox(width: 12),
+            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
             const Text('模拟所'),
           ],
         ),
@@ -96,9 +98,9 @@ class _MinePageState extends State<MinePage> with AutomaticKeepAliveClientMixin
           crossAxisAlignment: CrossAxisAlignment.start,
           children: [
             Text('虚拟货币模拟交易平台', style: theme.textTheme.muted),
-            const SizedBox(height: 16),
+            SizedBox(height: AppSpacing.md),
             _InfoRow(icon: LucideIcons.code, text: '版本: 1.0.0'),
-            const SizedBox(height: 8),
+            SizedBox(height: AppSpacing.sm),
             const _InfoRow(icon: LucideIcons.heart, text: 'Built with Flutter & shadcn_ui'),
           ],
         ),
@@ -153,11 +155,11 @@ class _UserCard extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return ShadCard(
-      padding: const EdgeInsets.all(20),
+      padding: EdgeInsets.all(AppSpacing.lg + AppSpacing.sm),
       child: Row(
         children: [
           _AppLogo(radius: 32, fontSize: 24, text: user?.avatarText),
-          const SizedBox(width: 16),
+          SizedBox(width: AppSpacing.md),
           Expanded(
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
@@ -166,7 +168,7 @@ class _UserCard extends StatelessWidget {
                   user?.username ?? '未登录',
                   style: theme.textTheme.h3.copyWith(fontWeight: FontWeight.bold),
                 ),
-                const SizedBox(height: 6),
+                SizedBox(height: AppSpacing.sm - AppSpacing.xs),
                 ShadBadge(
                   backgroundColor: theme.colorScheme.primary.withValues(alpha: 0.2),
                   child: Text(
@@ -225,7 +227,7 @@ class _InfoRow extends StatelessWidget {
     return Row(
       children: [
         Icon(icon, size: 14, color: theme.colorScheme.mutedForeground),
-        const SizedBox(width: 6),
+        SizedBox(width: AppSpacing.sm - AppSpacing.xs),
         Text(text, style: theme.textTheme.muted.copyWith(fontSize: 12)),
       ],
     );
@@ -287,17 +289,17 @@ class _ThemeToggleTile extends StatelessWidget {
     return InkWell(
       onTap: () => themeProvider.toggleTheme(),
       child: Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+        padding: EdgeInsets.symmetric(horizontal: AppSpacing.md, vertical: AppSpacing.sm + AppSpacing.xs),
         child: Row(
           children: [
             _MenuIcon(icon: isDarkMode ? LucideIcons.moon : LucideIcons.sun),
-            const SizedBox(width: 12),
+            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
             Expanded(
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   Text('深色模式', style: theme.textTheme.small.copyWith(fontWeight: FontWeight.w500)),
-                  const SizedBox(height: 2),
+                  SizedBox(height: AppSpacing.xs / 2),
                   Text(
                     isDarkMode ? '当前：深色主题' : '当前：浅色主题',
                     style: theme.textTheme.muted.copyWith(fontSize: 11),
@@ -331,18 +333,18 @@ class _MenuItemTile extends StatelessWidget {
     return InkWell(
       onTap: item.onTap,
       child: Padding(
-        padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 12),
+        padding: EdgeInsets.symmetric(horizontal: AppSpacing.md, vertical: AppSpacing.sm + AppSpacing.xs),
         child: Row(
           children: [
             _MenuIcon(icon: item.icon),
-            const SizedBox(width: 12),
+            SizedBox(width: AppSpacing.sm + AppSpacing.xs),
             Expanded(
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
                   Text(item.title, style: theme.textTheme.small.copyWith(fontWeight: FontWeight.w500)),
                   if (item.subtitle != null) ...[
-                    const SizedBox(height: 2),
+                    SizedBox(height: AppSpacing.xs / 2),
                     Text(item.subtitle!, style: theme.textTheme.muted.copyWith(fontSize: 11)),
                   ],
                 ],
@@ -371,7 +373,7 @@ class _MenuIcon extends StatelessWidget {
       height: 40,
       decoration: BoxDecoration(
         color: theme.colorScheme.primary.withValues(alpha: 0.1),
-        borderRadius: BorderRadius.circular(10),
+        borderRadius: BorderRadius.circular(AppRadius.md + AppSpacing.xs),
       ),
       child: Icon(icon, size: 20, color: theme.colorScheme.primary),
     );
@@ -391,12 +393,12 @@ class _LogoutButton extends StatelessWidget {
       height: 48,
       child: ShadButton.destructive(
         onPressed: onLogout,
-        child: const Row(
+        child: Row(
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
-            Icon(LucideIcons.logOut, size: 18),
-            SizedBox(width: 8),
-            Text('退出登录', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
+            const Icon(LucideIcons.logOut, size: 18),
+            SizedBox(width: AppSpacing.sm),
+            const Text('退出登录', style: TextStyle(fontSize: 16, fontWeight: FontWeight.w600)),
           ],
         ),
       ),
diff --git a/flutter_monisuo/lib/ui/pages/orders/fund_orders_page.dart b/flutter_monisuo/lib/ui/pages/orders/fund_orders_page.dart
index b51de29..2bdcc4c 100644
--- a/flutter_monisuo/lib/ui/pages/orders/fund_orders_page.dart
+++ b/flutter_monisuo/lib/ui/pages/orders/fund_orders_page.dart
@@ -343,19 +343,19 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
   }
 
   void _confirmPay(OrderFund order) async {
-    final confirmed = await showDialog<bool>(
+    final confirmed = await showShadDialog<bool>(
       context: context,
-      builder: (context) => AlertDialog(
+      builder: (context) => ShadDialog.alert(
         title: const Text('确认已打款'),
-        content: const Text('确认您已完成向指定地址的转账？'),
+        description: const Text('确认您已完成向指定地址的转账？'),
         actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(context, false),
+          ShadButton.outline(
             child: const Text('取消'),
+            onPressed: () => Navigator.pop(context, false),
           ),
-          TextButton(
-            onPressed: () => Navigator.pop(context, true),
+          ShadButton(
             child: const Text('确认'),
+            onPressed: () => Navigator.pop(context, true),
           ),
         ],
       ),
@@ -372,20 +372,19 @@ class _FundOrdersPageState extends State<FundOrdersPage> {
   }
 
   void _cancelOrder(OrderFund order) async {
-    final confirmed = await showDialog<bool>(
+    final confirmed = await showShadDialog<bool>(
       context: context,
-      builder: (context) => AlertDialog(
+      builder: (context) => ShadDialog.alert(
         title: const Text('取消订单'),
-        content: Text('确定要取消订单 ${order.orderNo} 吗？'),
+        description: Text('确定要取消订单 ${order.orderNo} 吗？'),
         actions: [
-          TextButton(
-            onPressed: () => Navigator.pop(context, false),
+          ShadButton.outline(
             child: const Text('返回'),
+            onPressed: () => Navigator.pop(context, false),
           ),
-          TextButton(
-            onPressed: () => Navigator.pop(context, true),
-            style: TextButton.styleFrom(foregroundColor: downColor),
+          ShadButton.destructive(
             child: const Text('确定取消'),
+            onPressed: () => Navigator.pop(context, true),
           ),
         ],
       ),
diff --git a/flutter_monisuo/lib/ui/pages/trade/trade_page.dart b/flutter_monisuo/lib/ui/pages/trade/trade_page.dart
index 3ff9007..fb3cda1 100644
--- a/flutter_monisuo/lib/ui/pages/trade/trade_page.dart
+++ b/flutter_monisuo/lib/ui/pages/trade/trade_page.dart
@@ -2,6 +2,8 @@ import 'package:flutter/material.dart';
 import 'package:shadcn_ui/shadcn_ui.dart';
 import 'package:provider/provider.dart';
 import '../../../core/constants/app_colors.dart';
+import '../../../core/theme/app_color_scheme.dart';
+import '../../../core/theme/app_spacing.dart';
 import '../../../data/models/coin.dart';
 import '../../../providers/market_provider.dart';
 import '../../../providers/asset_provider.dart';
@@ -52,7 +54,7 @@ class _TradePageState extends State<TradePage> with AutomaticKeepAliveClientMixi
       body: Consumer2<MarketProvider, AssetProvider>(
         builder: (context, market, asset, _) {
           return SingleChildScrollView(
-            padding: const EdgeInsets.all(16),
+            padding: AppSpacing.pagePadding,
             child: ShadForm(
               key: _formKey,
               child: Column(
@@ -65,9 +67,9 @@ class _TradePageState extends State<TradePage> with AutomaticKeepAliveClientMixi
                       _priceController.text = coin.formattedPrice;
                     },
                   ),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   if (_selectedCoin != null) _PriceCard(coin: _selectedCoin!),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _TradeForm(
                     tradeType: _tradeType,
                     selectedCoin: _selectedCoin,
@@ -76,7 +78,7 @@ class _TradePageState extends State<TradePage> with AutomaticKeepAliveClientMixi
                     tradeBalance: asset.overview?.tradeBalance,
                     onTradeTypeChanged: (type) => setState(() => _tradeType = type),
                   ),
-                  const SizedBox(height: 16),
+                  SizedBox(height: AppSpacing.md),
                   _TradeButton(
                     isBuy: _tradeType == 0,
                     coinCode: _selectedCoin?.code,
@@ -129,7 +131,7 @@ class _TradePageState extends State<TradePage> with AutomaticKeepAliveClientMixi
         title: Row(
           children: [
             Icon(LucideIcons.circleCheck, color: theme.colorScheme.primary, size: 24),
-            const SizedBox(width: 8),
+            SizedBox(width: AppSpacing.sm),
             const Text('交易成功'),
           ],
         ),
@@ -170,11 +172,11 @@ class _CoinSelector extends StatelessWidget {
     }
 
     return ShadCard(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.cardPadding,
       child: Row(
         children: [
           _CoinAvatar(icon: selectedCoin?.displayIcon),
-          const SizedBox(width: 12),
+          SizedBox(width: AppSpacing.sm + AppSpacing.xs),
           Expanded(
             child: Column(
               crossAxisAlignment: CrossAxisAlignment.start,
@@ -183,7 +185,7 @@ class _CoinSelector extends StatelessWidget {
                   selectedCoin != null ? '${selectedCoin!.code}/USDT' : '选择币种',
                   style: theme.textTheme.large.copyWith(fontWeight: FontWeight.bold),
                 ),
-                const SizedBox(height: 4),
+                SizedBox(height: AppSpacing.xs),
                 Text(selectedCoin?.name ?? '点击选择交易对', style: theme.textTheme.muted),
               ],
             ),
@@ -225,10 +227,10 @@ class _PriceCard extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final theme = ShadTheme.of(context);
-    final color = coin.isUp ? AppColors.up : AppColors.down;
+    final color = coin.isUp ? AppColorScheme.up : AppColorScheme.down;
 
     return ShadCard(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.cardPadding,
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: [
@@ -236,15 +238,15 @@ class _PriceCard extends StatelessWidget {
             crossAxisAlignment: CrossAxisAlignment.start,
             children: [
               Text('最新价', style: theme.textTheme.muted),
-              const SizedBox(height: 4),
+              SizedBox(height: AppSpacing.xs),
               Text('\$${coin.formattedPrice}', style: theme.textTheme.h2.copyWith(fontWeight: FontWeight.bold)),
             ],
           ),
           Container(
-            padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 6),
+            padding: EdgeInsets.symmetric(horizontal: AppSpacing.sm + AppSpacing.xs, vertical: AppSpacing.xs + AppSpacing.xs),
             decoration: BoxDecoration(
               color: color.withValues(alpha: 0.2),
-              borderRadius: BorderRadius.circular(8),
+              borderRadius: BorderRadius.circular(AppRadius.md),
             ),
             child: Text(
               coin.formattedChange,
@@ -280,7 +282,7 @@ class _TradeForm extends StatelessWidget {
     final theme = ShadTheme.of(context);
 
     return ShadCard(
-      padding: const EdgeInsets.all(16),
+      padding: AppSpacing.cardPadding,
       child: Column(
         children: [
           // 买入/卖出切换
@@ -288,7 +290,7 @@ class _TradeForm extends StatelessWidget {
             tradeType: tradeType,
             onChanged: onTradeTypeChanged,
           ),
-          const SizedBox(height: 20),
+          SizedBox(height: AppSpacing.lg + AppSpacing.xs),
           // 价格输入
           ShadInputFormField(
             id: 'price',
@@ -296,13 +298,13 @@ class _TradeForm extends StatelessWidget {
             controller: priceController,
             keyboardType: const TextInputType.numberWithOptions(decimal: true),
             placeholder: const Text('输入价格'),
-            trailing: const Padding(
-              padding: EdgeInsets.only(right: 8),
-              child: Text('USDT'),
+            trailing: Padding(
+              padding: EdgeInsets.only(right: AppSpacing.sm),
+              child: const Text('USDT'),
             ),
             validator: Validators.price,
           ),
-          const SizedBox(height: 12),
+          SizedBox(height: AppSpacing.md),
           // 数量输入
           ShadInputFormField(
             id: 'quantity',
@@ -311,15 +313,15 @@ class _TradeForm extends StatelessWidget {
             keyboardType: const TextInputType.numberWithOptions(decimal: true),
             placeholder: const Text('输入数量'),
             trailing: Padding(
-              padding: const EdgeInsets.only(right: 8),
+              padding: EdgeInsets.only(right: AppSpacing.sm),
               child: Text(selectedCoin?.code ?? ''),
             ),
             validator: Validators.quantity,
           ),
-          const SizedBox(height: 16),
+          SizedBox(height: AppSpacing.md),
           // 交易金额
           _InfoRow(label: '交易金额', value: '${_calculateAmount()} USDT'),
-          const SizedBox(height: 8),
+          SizedBox(height: AppSpacing.sm),
           // 可用余额
           _InfoRow(label: '可用', value: '${tradeBalance ?? '0.00'} USDT'),
         ],
@@ -349,16 +351,16 @@ class _TradeTypeSelector extends StatelessWidget {
           child: _TypeButton(
             label: '买入',
             isSelected: tradeType == 0,
-            color: AppColors.up,
+            color: AppColorScheme.up,
             onTap: () => onChanged(0),
           ),
         ),
-        const SizedBox(width: 16),
+        SizedBox(width: AppSpacing.md),
         Expanded(
           child: _TypeButton(
             label: '卖出',
             isSelected: tradeType == 1,
-            color: AppColors.down,
+            color: AppColorScheme.down,
             onTap: () => onChanged(1),
           ),
         ),
@@ -386,10 +388,10 @@ class _TypeButton extends StatelessWidget {
     return GestureDetector(
       onTap: onTap,
       child: Container(
-        padding: const EdgeInsets.symmetric(vertical: 12),
+        padding: EdgeInsets.symmetric(vertical: AppSpacing.sm + AppSpacing.xs),
         decoration: BoxDecoration(
           color: isSelected ? color : Colors.transparent,
-          borderRadius: BorderRadius.circular(8),
+          borderRadius: BorderRadius.circular(AppRadius.md),
           border: isSelected ? null : Border.all(color: color),
         ),
         child: Center(
@@ -441,7 +443,7 @@ class _TradeButton extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final color = isBuy ? AppColors.up : AppColors.down;
+    final color = isBuy ? AppColorScheme.up : AppColorScheme.down;
 
     return SizedBox(
       width: double.infinity,
@@ -453,7 +455,7 @@ class _TradeButton extends StatelessWidget {
           mainAxisAlignment: MainAxisAlignment.center,
           children: [
             Icon(isBuy ? LucideIcons.arrowDownToLine : LucideIcons.arrowUpFromLine, size: 18, color: Colors.white),
-            const SizedBox(width: 8),
+            SizedBox(width: AppSpacing.sm),
             Text(
               '${isBuy ? '买入' : '卖出'} ${coinCode ?? ''}',
               style: const TextStyle(color: Colors.white, fontSize: 16, fontWeight: FontWeight.w600),