diff --git a/src/components/business/CommentItem.tsx b/src/components/business/CommentItem.tsx
index b8fb632..707929b 100644
--- a/src/components/business/CommentItem.tsx
+++ b/src/components/business/CommentItem.tsx
@@ -143,7 +143,6 @@ function createCommentItemStyles(colors: AppColors) {
       paddingVertical: spacing.xs,
       borderLeftWidth: 2,
       borderLeftColor: colors.divider,
-      backgroundColor: colors.background.default,
     },
     subReplyItem: {
       flexDirection: 'row',
@@ -154,8 +153,8 @@ function createCommentItemStyles(colors: AppColors) {
       marginBottom: 0,
     },
     subReplyBody: {
-      fontSize: fontSizes.sm,
-      lineHeight: 20,
+      fontSize: fontSizes.md,
+      lineHeight: 22,
       marginTop: 2,
     },
     subReplyContent: {
@@ -177,10 +176,10 @@ function createCommentItemStyles(colors: AppColors) {
       paddingVertical: spacing.xs,
     },
     replyToText: {
-      fontSize: fontSizes.xs,
+      fontSize: fontSizes.sm,
     },
     replyToName: {
-      fontSize: fontSizes.xs,
+      fontSize: fontSizes.sm,
       fontWeight: '500',
     },
     subReplyActions: {
@@ -483,7 +482,7 @@ const CommentItem: React.FC<CommentItemProps> = ({
                   {targetNickname && (
                     <>
                       <Text variant="caption" color={colors.text.hint} style={styles.replyToText}>
-                        {' '}回复
+                        {' '}回复{' '}
                       </Text>
                       <Text variant="caption" color={colors.primary.main} style={styles.replyToName}>
                         {targetNickname}
@@ -501,15 +500,6 @@ const CommentItem: React.FC<CommentItemProps> = ({
                 {renderSubReplyImages(reply)}
                 {/* 子评论操作按钮 */}
                 <View style={styles.subReplyActions}>
-                  <TouchableOpacity
-                    style={styles.subActionButton}
-                    onPress={() => onReplyPress?.(reply)}
-                  >
-                    <MaterialCommunityIcons name="reply" size={12} color={colors.text.hint} />
-                    <Text variant="caption" color={colors.text.hint} style={styles.subActionText}>
-                      回复
-                    </Text>
-                  </TouchableOpacity>
                   {/* 点赞按钮 */}
                   <TouchableOpacity
                     style={styles.subActionButton}
@@ -518,7 +508,7 @@ const CommentItem: React.FC<CommentItemProps> = ({
                   >
                     <MaterialCommunityIcons
                       name={reply.is_liked ? 'heart' : 'heart-outline'}
-                      size={12}
+                      size={14}
                       color={reply.is_liked ? colors.error.main : colors.text.hint}
                     />
                     <Text
@@ -529,6 +519,15 @@ const CommentItem: React.FC<CommentItemProps> = ({
                       {reply.likes_count > 0 ? formatNumber(reply.likes_count) : '赞'}
                     </Text>
                   </TouchableOpacity>
+                  <TouchableOpacity
+                    style={styles.subActionButton}
+                    onPress={() => onReplyPress?.(reply)}
+                  >
+                    <MaterialCommunityIcons name="reply" size={14} color={colors.text.hint} />
+                    <Text variant="caption" color={colors.text.hint} style={styles.subActionText}>
+                      回复
+                    </Text>
+                  </TouchableOpacity>
                   {/* 删除按钮 - 子评论作者可见 */}
                   {isSubReplyAuthor && (
                     <TouchableOpacity
@@ -538,7 +537,7 @@ const CommentItem: React.FC<CommentItemProps> = ({
                     >
                       <MaterialCommunityIcons
                         name={isDeleting ? 'loading' : 'delete-outline'}
-                        size={12}
+                        size={14}
                         color={colors.text.hint}
                       />
                       <Text variant="caption" color={colors.text.hint} style={styles.subActionText}>
@@ -546,13 +545,12 @@ const CommentItem: React.FC<CommentItemProps> = ({
                       </Text>
                     </TouchableOpacity>
                   )}
-                  {/* 举报按钮 - 对非子评论作者显示 */}
                   {!isSubReplyAuthor && onReport && (
                     <TouchableOpacity
                       style={styles.subActionButton}
                       onPress={() => onReport(reply)}
                     >
-                      <MaterialCommunityIcons name="flag-outline" size={12} color={colors.text.hint} />
+                      <MaterialCommunityIcons name="flag-outline" size={14} color={colors.text.hint} />
                       <Text variant="caption" color={colors.text.hint} style={styles.subActionText}>
                         举报
                       </Text>
diff --git a/src/components/business/TradeCard/TradeCard.tsx b/src/components/business/TradeCard/TradeCard.tsx
index ca9da18..243033d 100644
--- a/src/components/business/TradeCard/TradeCard.tsx
+++ b/src/components/business/TradeCard/TradeCard.tsx
@@ -41,6 +41,7 @@ function createTradeCardStyles(colors: AppColors) {
       position: 'relative',
       aspectRatio: 1,
       backgroundColor: colors.background.default,
+      minHeight: 140,
     },
     listImageContainer: {
       width: 120,
@@ -104,7 +105,9 @@ function createTradeCardStyles(colors: AppColors) {
       fontWeight: '600',
     },
     gridContent: {
-      padding: spacing.sm,
+      paddingHorizontal: spacing.sm,
+      paddingTop: spacing.xs,
+      paddingBottom: spacing.sm,
     },
     titleRow: {
       flexDirection: 'row',
@@ -155,7 +158,7 @@ function createTradeCardStyles(colors: AppColors) {
       flexDirection: 'row',
       flexWrap: 'wrap',
       gap: 4,
-      marginTop: spacing.xs,
+      marginTop: 2,
     },
     tag: {
       paddingHorizontal: 5,
@@ -191,7 +194,7 @@ function createTradeCardStyles(colors: AppColors) {
       flexDirection: 'row',
       alignItems: 'center',
       justifyContent: 'space-between',
-      marginTop: spacing.sm,
+      marginTop: spacing.xs,
     },
     authorRow: {
       flexDirection: 'row',
@@ -354,6 +357,9 @@ const TradeCardBase: React.FC<TradeCardProps> = ({ item, variant = 'list', onPre
     );
   }
 
+  // grid variant is used in masonry layout; list variant below is unused but kept for compatibility
+
+
   return (
     <TouchableOpacity
       style={styles.listCard}
diff --git a/src/components/common/Text.tsx b/src/components/common/Text.tsx
index ca6404e..76212eb 100644
--- a/src/components/common/Text.tsx
+++ b/src/components/common/Text.tsx
@@ -15,7 +15,7 @@ interface CustomTextProps extends Omit<TextProps, 'style'> {
   color?: string;
   numberOfLines?: number;
   onPress?: () => void;
-  style?: TextStyle | TextStyle[];
+  style?: TextStyle | TextStyle[] | (TextStyle | undefined)[];
   weight?: 'regular' | 'medium' | 'semibold' | 'bold';
 }
 
diff --git a/src/screens/apps/AppsScreen.tsx b/src/screens/apps/AppsScreen.tsx
index 9aab6d2..efd6fd6 100644
--- a/src/screens/apps/AppsScreen.tsx
+++ b/src/screens/apps/AppsScreen.tsx
@@ -90,9 +90,6 @@ export const AppsScreen: React.FC = () => {
 
   const renderTiles = () => (
     <>
-      <Text variant="caption" color={colors.text.secondary} style={styles.pageSubtitle}>
-        与社区账号打通的轻应用入口
-      </Text>
       {APP_ENTRIES.map(item => (
         <TouchableOpacity
           key={item.id}
diff --git a/src/screens/home/HomeScreen.tsx b/src/screens/home/HomeScreen.tsx
index 1213ecc..b96a35c 100644
--- a/src/screens/home/HomeScreen.tsx
+++ b/src/screens/home/HomeScreen.tsx
@@ -130,19 +130,19 @@ function createHomeStyles(colors: AppColors, responsivePadding: number) {
       flexDirection: 'row',
       alignItems: 'center',
       paddingHorizontal: spacing.md,
-      paddingVertical: spacing.xs,
+      paddingVertical: spacing.sm,
     },
     sortBarCapsuleScroll: {
       flex: 1,
-      marginHorizontal: spacing.xs,
     },
     sortBarCapsuleContent: {
-      gap: spacing.xs,
+      gap: spacing.sm,
       alignItems: 'center',
+      paddingVertical: spacing.xs,
     },
     capsuleItem: {
       paddingHorizontal: spacing.md,
-      paddingVertical: spacing.xs,
+      paddingVertical: spacing.sm,
       borderRadius: 999,
     },
     capsuleText: {
@@ -156,8 +156,8 @@ function createHomeStyles(colors: AppColors, responsivePadding: number) {
     sortTrigger: {
       flexDirection: 'row',
       alignItems: 'center',
-      paddingVertical: 4,
-      paddingHorizontal: 2,
+      paddingVertical: spacing.sm,
+      paddingHorizontal: spacing.xs,
     },
     sortTriggerText: {
       fontSize: 13,
@@ -986,10 +986,7 @@ export const HomeScreen: React.FC = () => {
             renderItem={({ item }: { item: { key: string; label: string } }) => (
               <TouchableOpacity
                 activeOpacity={0.7}
-                style={[
-                  styles.capsuleItem,
-                  marketCategory === item.key && { backgroundColor: `${colors.primary.main}18` },
-                ]}
+                style={styles.capsuleItem}
                 onPress={() => setMarketCategory(item.key as TradeCategory | 'all')}
               >
                 <Text style={[
diff --git a/src/screens/home/MarketView.tsx b/src/screens/home/MarketView.tsx
index cb9d33e..41a0efb 100644
--- a/src/screens/home/MarketView.tsx
+++ b/src/screens/home/MarketView.tsx
@@ -1,5 +1,5 @@
 import React, { useState, useEffect, useCallback, useRef, useMemo } from 'react';
-import { View, StyleSheet, RefreshControl, Pressable } from 'react-native';
+import { View, StyleSheet, RefreshControl } from 'react-native';
 import { FlashList, FlashListRef } from '@shopify/flash-list';
 import type { ListRenderItem } from '@shopify/flash-list';
 import { useAppColors, type AppColors } from '../../theme';
@@ -27,12 +27,9 @@ function createMarketStyles(colors: AppColors, gap: number, padding: number) {
     },
     listContent: {
       paddingHorizontal: padding,
-      paddingTop: gap,
+      paddingTop: gap / 2,
       paddingBottom: 80,
     },
-    columnWrapper: {
-      justifyContent: 'space-between',
-    },
   });
 }
 
@@ -54,7 +51,7 @@ export function MarketView({
   const colors = useAppColors();
   const router = useRouter();
   const isAuth = useIsAuthenticated();
-  const { width, isMobile } = useResponsive();
+  const { width } = useResponsive();
 
   const gap = useResponsiveSpacing({ xs: 6, sm: 8, md: 10, lg: 12, xl: 16 });
   const padding = useResponsiveSpacing({ xs: 8, sm: 10, md: 12, lg: 16, xl: 20 });
@@ -74,7 +71,7 @@ export function MarketView({
   const setFilterType = onFilterTypeChange ?? setFilterTypeLocal;
   const setSelectedCategory = onSelectedCategoryChange ?? setSelectedCategoryLocal;
 
-  const flashListRef = useRef<any>(null);
+  const flashListRef = useRef<FlashListRef<any>>(null);
 
   // 网格列数：移动端2列，平板3列，桌面4列
   const numColumns = useMemo(() => {
@@ -83,12 +80,6 @@ export function MarketView({
     return 2;
   }, [width]);
 
-  // 计算卡片宽度（用于固定宽高比）
-  const cardWidth = useMemo(() => {
-    const totalGap = gap * (numColumns - 1);
-    return Math.floor((width - padding * 2 - totalGap) / numColumns);
-  }, [width, padding, gap, numColumns]);
-
   const fetchItems = useCallback(async (isRefresh = false) => {
     try {
       if (isRefresh) {
@@ -172,7 +163,7 @@ export function MarketView({
   }, [items, isAuth]);
 
   const renderItem = useCallback<ListRenderItem<TradeItemDTO>>(({ item }) => (
-    <View style={{ width: cardWidth, marginBottom: gap }}>
+    <View style={{ marginBottom: gap }}>
       <TradeCard
         item={item}
         variant="grid"
@@ -180,7 +171,7 @@ export function MarketView({
         onFavorite={handleFavorite}
       />
     </View>
-  ), [handlePressItem, handleFavorite, cardWidth, gap]);
+  ), [handlePressItem, handleFavorite, gap]);
 
   const keyExtractor = useCallback((item: TradeItemDTO) => item.id, []);
 
@@ -217,6 +208,7 @@ export function MarketView({
         }
         ListFooterComponent={isLoadingMore ? <Loading size="sm" /> : null}
         drawDistance={250}
+        masonry
       />
     </View>
   );
diff --git a/src/screens/material/MaterialDetailScreen.tsx b/src/screens/material/MaterialDetailScreen.tsx
index 0b7dacc..4f57785 100644
--- a/src/screens/material/MaterialDetailScreen.tsx
+++ b/src/screens/material/MaterialDetailScreen.tsx
@@ -1,5 +1,6 @@
 /**
  * 资料详情页：展示资料详细信息
+ * 现代化扁平化设计，风格统一
  */
 import React, { useCallback, useEffect, useMemo, useState } from 'react';
 import {
@@ -114,16 +115,17 @@ export const MaterialDetailScreen: React.FC = () => {
     });
   }, []);
 
+  // 扁平化卡片样式：更柔和的阴影，更大的圆角
   const cardStyle = useMemo(
     () => ({
       backgroundColor: colors.background.paper,
-      borderRadius: borderRadius.lg,
+      borderRadius: borderRadius.xl,
       overflow: 'hidden' as const,
-      shadowColor: '#000',
-      shadowOffset: { width: 0, height: 1 },
-      shadowOpacity: 0.04,
-      shadowRadius: 4,
-      elevation: 1,
+      shadowColor: colors.chat.shadow,
+      shadowOffset: { width: 0, height: 2 },
+      shadowOpacity: 0.06,
+      shadowRadius: 8,
+      elevation: 2,
     }),
     [colors]
   );
@@ -159,14 +161,20 @@ export const MaterialDetailScreen: React.FC = () => {
 
     return (
       <>
-        {/* 文件信息卡片 */}
+        {/* 文件信息卡片 - 现代化设计 */}
         <View style={[styles.fileCard, cardStyle]}>
+          {/* 顶部文件类型标识区 - 扁平化渐变 */}
           <View style={[styles.fileTypeBanner, { backgroundColor: fileColor }]}>
-            <MaterialCommunityIcons name={iconName as any} size={48} color="#FFFFFF" />
-            <Text variant="body" style={styles.fileTypeName}>
-              {fileTypeName}
-            </Text>
+            <View style={styles.fileIconWrapper}>
+              <MaterialCommunityIcons name={iconName as any} size={40} color="#FFFFFF" />
+            </View>
+            <View style={styles.fileTypeBadge}>
+              <Text variant="caption" style={styles.fileTypeName}>
+                {fileTypeName}
+              </Text>
+            </View>
           </View>
+
           <View style={styles.fileInfo}>
             <Text variant="h3" style={styles.fileName}>
               {material.title}
@@ -176,16 +184,18 @@ export const MaterialDetailScreen: React.FC = () => {
                 {material.description}
               </Text>
             )}
+
+            {/* 元数据 - 现代化标签式布局 */}
             <View style={styles.fileMetaRow}>
-              <View style={styles.metaItem}>
-                <MaterialCommunityIcons name="file-outline" size={16} color={colors.text.hint} />
-                <Text variant="caption" color={colors.text.hint}>
+              <View style={[styles.metaBadge, { backgroundColor: `${colors.neutral.main}12` }]}>
+                <MaterialCommunityIcons name="file-outline" size={14} color={colors.neutral.main} />
+                <Text variant="caption" color={colors.neutral.dark} style={styles.metaBadgeText}>
                   {formatFileSize(material.file_size)}
                 </Text>
               </View>
-              <View style={styles.metaItem}>
-                <MaterialCommunityIcons name="download" size={16} color={colors.text.hint} />
-                <Text variant="caption" color={colors.text.hint}>
+              <View style={[styles.metaBadge, { backgroundColor: `${colors.primary.main}12` }]}>
+                <MaterialCommunityIcons name="download" size={14} color={colors.primary.main} />
+                <Text variant="caption" color={colors.primary.dark} style={styles.metaBadgeText}>
                   {material.download_count} 次下载
                 </Text>
               </View>
@@ -193,46 +203,69 @@ export const MaterialDetailScreen: React.FC = () => {
           </View>
         </View>
 
-        {/* 详细信息 */}
+        {/* 详细信息卡片 - 扁平化列表 */}
         <View style={[styles.detailCard, cardStyle]}>
-          <Text variant="body" style={styles.sectionTitle}>
-            详细信息
-          </Text>
-          <View style={styles.detailRow}>
-            <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
-              文件名
-            </Text>
-            <Text variant="body" color={colors.text.primary} style={styles.detailValue}>
-              {material.file_name}
+          <View style={styles.sectionHeader}>
+            <View style={[styles.sectionIcon, { backgroundColor: `${colors.info.main}12` }]}>
+              <MaterialCommunityIcons name="information-outline" size={18} color={colors.info.main} />
+            </View>
+            <Text variant="body" style={styles.sectionTitle}>
+              详细信息
             </Text>
           </View>
-          <View style={styles.detailRow}>
-            <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
-              上传时间
-            </Text>
-            <Text variant="body" color={colors.text.primary} style={styles.detailValue}>
-              {formatDate(material.created_at)}
-            </Text>
-          </View>
-          {material.author_name && (
+
+          <View style={styles.detailList}>
             <View style={styles.detailRow}>
-              <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
-                上传者
-              </Text>
+              <View style={styles.detailLabelWrapper}>
+                <MaterialCommunityIcons name="file-document-outline" size={16} color={colors.text.hint} />
+                <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
+                  文件名
+                </Text>
+              </View>
               <Text variant="body" color={colors.text.primary} style={styles.detailValue}>
-                {material.author_name}
+                {material.file_name}
               </Text>
             </View>
-          )}
-          {material.tags && material.tags.length > 0 && (
-            <View style={styles.tagContainer}>
-              <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
-                标签
+
+            <View style={styles.detailRow}>
+              <View style={styles.detailLabelWrapper}>
+                <MaterialCommunityIcons name="calendar-outline" size={16} color={colors.text.hint} />
+                <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
+                  上传时间
+                </Text>
+              </View>
+              <Text variant="body" color={colors.text.primary} style={styles.detailValue}>
+                {formatDate(material.created_at)}
               </Text>
+            </View>
+
+            {material.author_name && (
+              <View style={styles.detailRow}>
+                <View style={styles.detailLabelWrapper}>
+                  <MaterialCommunityIcons name="account-outline" size={16} color={colors.text.hint} />
+                  <Text variant="caption" color={colors.text.hint} style={styles.detailLabel}>
+                    上传者
+                  </Text>
+                </View>
+                <Text variant="body" color={colors.text.primary} style={styles.detailValue}>
+                  {material.author_name}
+                </Text>
+              </View>
+            )}
+          </View>
+
+          {material.tags && material.tags.length > 0 && (
+            <View style={styles.tagSection}>
+              <View style={styles.tagSectionHeader}>
+                <MaterialCommunityIcons name="tag-outline" size={16} color={colors.text.hint} />
+                <Text variant="caption" color={colors.text.hint} style={styles.tagSectionTitle}>
+                  标签
+                </Text>
+              </View>
               <View style={styles.tags}>
                 {material.tags.map((tag, index) => (
-                  <View key={index} style={styles.tag}>
-                    <Text variant="caption" color={colors.primary.main}>
+                  <View key={index} style={[styles.tag, { backgroundColor: `${colors.primary.main}10` }]}>
+                    <Text variant="caption" color={colors.primary.main} style={styles.tagText}>
                       {tag}
                     </Text>
                   </View>
@@ -242,24 +275,29 @@ export const MaterialDetailScreen: React.FC = () => {
           )}
         </View>
 
-        {/* 操作按钮 */}
+        {/* 操作按钮 - 现代化扁平按钮 */}
         <View style={styles.actionButtons}>
           <TouchableOpacity
             style={[styles.previewButton, { backgroundColor: colors.background.paper }]}
             onPress={handlePreview}
-            activeOpacity={0.8}
+            activeOpacity={0.7}
           >
-            <MaterialCommunityIcons name="eye-outline" size={20} color={colors.text.primary} />
+            <View style={[styles.actionIconWrapper, { backgroundColor: `${colors.neutral.main}12` }]}>
+              <MaterialCommunityIcons name="eye-outline" size={18} color={colors.neutral.dark} />
+            </View>
             <Text variant="body" color={colors.text.primary} style={styles.actionButtonText}>
               在线预览
             </Text>
           </TouchableOpacity>
+
           <TouchableOpacity
             style={[styles.downloadButton, { backgroundColor: colors.primary.main }]}
             onPress={handleDownload}
             activeOpacity={0.8}
           >
-            <MaterialCommunityIcons name="download" size={20} color={colors.primary.contrast} />
+            <View style={[styles.actionIconWrapper, { backgroundColor: 'rgba(255,255,255,0.2)' }]}>
+              <MaterialCommunityIcons name="download" size={18} color="#FFFFFF" />
+            </View>
             <Text variant="body" color={colors.primary.contrast} style={styles.actionButtonText}>
               下载资料
             </Text>
@@ -273,7 +311,7 @@ export const MaterialDetailScreen: React.FC = () => {
     <SafeAreaView style={styles.container} edges={['top', 'bottom']}>
       <StatusBar barStyle={statusBarStyle} backgroundColor={colors.background.default} />
 
-      {/* Header */}
+      {/* Header - 扁平化设计 */}
       <View style={[styles.header, isWideScreen && styles.headerWide]}>
         <View style={styles.headerLeft}>
           <AppBackButton onPress={() => router.back()} />
@@ -284,15 +322,15 @@ export const MaterialDetailScreen: React.FC = () => {
           </Text>
         </View>
         <View style={styles.headerRight}>
-          <TouchableOpacity style={styles.shareButton}>
-            <MaterialCommunityIcons name="share-variant" size={22} color={colors.text.primary} />
+          <TouchableOpacity style={styles.shareButton} activeOpacity={0.7}>
+            <MaterialCommunityIcons name="share-variant" size={20} color={colors.text.secondary} />
           </TouchableOpacity>
         </View>
       </View>
 
       {/* Content */}
       {isWideScreen ? (
-        <ResponsiveContainer maxWidth={800}>
+        <ResponsiveContainer maxWidth={720}>
           <ScrollView
             style={styles.scroll}
             contentContainerStyle={[styles.scrollContent, { paddingBottom: scrollBottomInset }]}
@@ -326,6 +364,7 @@ function createMaterialDetailStyles(colors: AppColors) {
       flex: 1,
       backgroundColor: colors.background.default,
     },
+    // Header
     header: {
       flexDirection: 'row',
       alignItems: 'center',
@@ -333,7 +372,8 @@ function createMaterialDetailStyles(colors: AppColors) {
       paddingHorizontal: spacing.md,
       paddingVertical: spacing.md,
       backgroundColor: headerBg,
-      ...shadows.sm,
+      borderBottomWidth: 1,
+      borderBottomColor: colors.chat.borderHairline,
     },
     headerWide: {
       paddingHorizontal: spacing.lg,
@@ -348,12 +388,13 @@ function createMaterialDetailStyles(colors: AppColors) {
       alignItems: 'center',
     },
     headerTitle: {
-      fontSize: 19,
-      fontWeight: '700',
+      fontSize: fontSizes.lg,
+      fontWeight: '600',
       color: colors.text.primary,
+      letterSpacing: 0.3,
     },
     headerTitleWide: {
-      fontSize: 22,
+      fontSize: fontSizes.xl,
     },
     headerRight: {
       width: 44,
@@ -361,16 +402,19 @@ function createMaterialDetailStyles(colors: AppColors) {
     },
     shareButton: {
       padding: spacing.xs,
+      borderRadius: borderRadius.md,
     },
+    // Scroll
     scroll: {
       flex: 1,
       backgroundColor: headerBg,
     },
     scrollContent: {
-      paddingTop: spacing.md,
+      paddingTop: spacing.lg,
       flexGrow: 1,
       backgroundColor: headerBg,
     },
+    // Center states
     centerContainer: {
       flex: 1,
       justifyContent: 'center',
@@ -386,19 +430,36 @@ function createMaterialDetailStyles(colors: AppColors) {
       paddingVertical: spacing.sm,
       paddingHorizontal: spacing.lg,
     },
+    // File card
     fileCard: {
-      marginBottom: spacing.md,
+      marginBottom: spacing.lg,
     },
     fileTypeBanner: {
-      height: 88,
+      height: 120,
       alignItems: 'center',
       justifyContent: 'center',
+      position: 'relative',
+    },
+    fileIconWrapper: {
+      width: 72,
+      height: 72,
+      borderRadius: borderRadius['2xl'],
+      backgroundColor: 'rgba(255,255,255,0.2)',
+      alignItems: 'center',
+      justifyContent: 'center',
+      marginBottom: spacing.sm,
+    },
+    fileTypeBadge: {
+      paddingVertical: spacing.xs,
+      paddingHorizontal: spacing.md,
+      borderRadius: borderRadius.full,
+      backgroundColor: 'rgba(255,255,255,0.25)',
     },
     fileTypeName: {
       color: '#FFFFFF',
       fontWeight: '700',
-      fontSize: fontSizes.lg,
-      marginTop: spacing.sm,
+      fontSize: fontSizes.sm,
+      letterSpacing: 0.5,
     },
     fileInfo: {
       padding: spacing.lg,
@@ -406,69 +467,114 @@ function createMaterialDetailStyles(colors: AppColors) {
     fileName: {
       color: colors.text.primary,
       fontWeight: '700',
-      fontSize: fontSizes.lg,
+      fontSize: fontSizes.xl,
+      lineHeight: fontSizes.xl * 1.4,
     },
     fileDescription: {
       marginTop: spacing.sm,
-      lineHeight: fontSizes.md * 1.5,
+      lineHeight: fontSizes.md * 1.6,
+      color: colors.text.secondary,
     },
     fileMetaRow: {
       flexDirection: 'row',
-      marginTop: spacing.md,
-      gap: spacing.md,
+      marginTop: spacing.lg,
+      gap: spacing.sm,
+      flexWrap: 'wrap',
     },
-    metaItem: {
+    metaBadge: {
       flexDirection: 'row',
       alignItems: 'center',
       gap: spacing.xs,
+      paddingVertical: spacing.xs + 2,
+      paddingHorizontal: spacing.md,
+      borderRadius: borderRadius.full,
     },
+    metaBadgeText: {
+      fontWeight: '500',
+      fontSize: fontSizes.sm,
+    },
+    // Detail card
     detailCard: {
       padding: spacing.lg,
+      marginBottom: spacing.lg,
+    },
+    sectionHeader: {
+      flexDirection: 'row',
+      alignItems: 'center',
       marginBottom: spacing.md,
+      gap: spacing.sm,
+    },
+    sectionIcon: {
+      width: 32,
+      height: 32,
+      borderRadius: borderRadius.md,
+      alignItems: 'center',
+      justifyContent: 'center',
     },
     sectionTitle: {
       fontWeight: '700',
       fontSize: fontSizes.md,
       color: colors.text.primary,
-      marginBottom: spacing.md,
+      letterSpacing: 0.2,
+    },
+    detailList: {
+      gap: 0,
     },
     detailRow: {
       flexDirection: 'row',
       justifyContent: 'space-between',
       alignItems: 'center',
-      paddingVertical: spacing.sm,
+      paddingVertical: spacing.md,
       borderBottomWidth: 1,
-      borderBottomColor: colors.divider,
+      borderBottomColor: colors.chat.borderHairline,
     },
-    detailLabel: {
-      width: 80,
-    },
-    detailValue: {
-      flex: 1,
-      textAlign: 'right',
-    },
-    tagContainer: {
+    detailLabelWrapper: {
       flexDirection: 'row',
       alignItems: 'center',
-      marginTop: spacing.sm,
+      gap: spacing.sm,
+      flex: 1,
+    },
+    detailLabel: {
+      fontWeight: '500',
+    },
+    detailValue: {
+      flex: 1.5,
+      textAlign: 'right',
+      fontWeight: '500',
+    },
+    // Tags
+    tagSection: {
+      marginTop: spacing.md,
+    },
+    tagSectionHeader: {
+      flexDirection: 'row',
+      alignItems: 'center',
+      gap: spacing.sm,
+      marginBottom: spacing.sm,
+    },
+    tagSectionTitle: {
+      fontWeight: '500',
     },
     tags: {
       flexDirection: 'row',
       flexWrap: 'wrap',
-      gap: spacing.xs,
-      flex: 1,
+      gap: spacing.sm,
     },
     tag: {
-      paddingVertical: spacing.xs,
-      paddingHorizontal: spacing.sm,
-      backgroundColor: `${colors.primary.main}10`,
-      borderRadius: borderRadius.md,
-      borderWidth: 0,
+      paddingVertical: spacing.xs + 2,
+      paddingHorizontal: spacing.md,
+      borderRadius: borderRadius.full,
     },
+    tagText: {
+      fontWeight: '600',
+      fontSize: fontSizes.sm,
+    },
+    // Action buttons
     actionButtons: {
       flexDirection: 'row',
       gap: spacing.md,
-      marginTop: spacing.lg,
+      marginTop: spacing.sm,
+      marginBottom: spacing.lg,
     },
     previewButton: {
       flex: 1,
@@ -476,10 +582,15 @@ function createMaterialDetailStyles(colors: AppColors) {
       alignItems: 'center',
       justifyContent: 'center',
       paddingVertical: spacing.md,
-      borderRadius: borderRadius.md,
-      gap: spacing.xs,
-      borderWidth: StyleSheet.hairlineWidth,
-      borderColor: colors.divider,
+      borderRadius: borderRadius.xl,
+      gap: spacing.sm,
+      borderWidth: 1,
+      borderColor: colors.chat.border,
+      shadowColor: colors.chat.shadow,
+      shadowOffset: { width: 0, height: 1 },
+      shadowOpacity: 0.04,
+      shadowRadius: 4,
+      elevation: 1,
     },
     downloadButton: {
       flex: 1,
@@ -487,11 +598,25 @@ function createMaterialDetailStyles(colors: AppColors) {
       alignItems: 'center',
       justifyContent: 'center',
       paddingVertical: spacing.md,
+      borderRadius: borderRadius.xl,
+      gap: spacing.sm,
+      shadowColor: colors.primary.main,
+      shadowOffset: { width: 0, height: 4 },
+      shadowOpacity: 0.25,
+      shadowRadius: 8,
+      elevation: 4,
+    },
+    actionIconWrapper: {
+      width: 32,
+      height: 32,
       borderRadius: borderRadius.md,
-      gap: spacing.xs,
+      alignItems: 'center',
+      justifyContent: 'center',
     },
     actionButtonText: {
-      fontWeight: '600',
+      fontWeight: '700',
+      fontSize: fontSizes.md,
+      letterSpacing: 0.3,
     },
   });
-}
\ No newline at end of file
+}
diff --git a/src/screens/message/components/ChatScreen/ChatHeader.tsx b/src/screens/message/components/ChatScreen/ChatHeader.tsx
index c02e718..fe0ec9d 100644
--- a/src/screens/message/components/ChatScreen/ChatHeader.tsx
+++ b/src/screens/message/components/ChatScreen/ChatHeader.tsx
@@ -79,56 +79,52 @@ export const ChatHeader: React.FC<ChatHeaderProps> = ({
   return (
     <View style={styles.headerContainer}>
       <View style={styles.header}>
-        <TouchableOpacity style={styles.backButton} onPress={onBack} activeOpacity={0.7}>
-          <MaterialCommunityIcons name="chevron-left" size={28} color={iconColor} />
-        </TouchableOpacity>
-        
+        <View style={styles.headerLeft}>
+          <TouchableOpacity style={styles.backButton} onPress={onBack} activeOpacity={0.7}>
+            <MaterialCommunityIcons name="chevron-left" size={28} color={iconColor} />
+          </TouchableOpacity>
+          {isGroupChat ? (
+            <Avatar
+              source={groupInfo?.avatar || null}
+              size={36}
+              name={groupInfo?.name || '群'}
+              style={styles.groupAvatar}
+            />
+          ) : (
+            <Avatar
+              source={otherUser?.avatar || null}
+              size={36}
+              name={otherUser?.nickname || ''}
+            />
+          )}
+        </View>
+
         <View style={styles.headerCenter}>
           <TouchableOpacity
             style={styles.titleRow}
             onPress={onTitlePress}
             activeOpacity={0.75}
           >
-            {isGroupChat ? (
-              <>
-                <View style={styles.titleLeading}>
-                  <Avatar
-                    source={groupInfo?.avatar || null}
-                    size={36}
-                    name={groupInfo?.name || '群'}
-                    style={styles.groupAvatar}
-                  />
-                </View>
-                <View style={styles.titleContent}>
-                  <Text style={styles.headerName} numberOfLines={1}>{getDisplayTitle()}</Text>
-                  <View style={styles.subtitleRow}>
-                    <Text style={styles.memberCount}>{groupInfo?.member_count || 0}位成员</Text>
-                    {typingHint && (
-                      <Text style={styles.typingHint} numberOfLines={1}>{typingHint}</Text>
-                    )}
-                  </View>
-                </View>
-              </>
-            ) : (
-              <>
-                <Avatar
-                  source={otherUser?.avatar || null}
-                  size={36}
-                  name={otherUser?.nickname || ''}
-                />
-                <View style={styles.titleContent}>
-                  <Text style={styles.headerName} numberOfLines={1}>{getDisplayTitle()}</Text>
+            <View style={styles.titleContent}>
+              <Text style={styles.headerName} numberOfLines={1}>{getDisplayTitle()}</Text>
+              {isGroupChat ? (
+                <View style={styles.subtitleRow}>
+                  <Text style={styles.memberCount}>{groupInfo?.member_count || 0}位成员</Text>
                   {typingHint && (
-                    <View style={styles.subtitleRow}>
-                      <Text style={styles.typingHint} numberOfLines={1}>{typingHint}</Text>
-                    </View>
+                    <Text style={styles.typingHint} numberOfLines={1}>{typingHint}</Text>
                   )}
                 </View>
-              </>
-            )}
+              ) : (
+                typingHint && (
+                  <View style={styles.subtitleRow}>
+                    <Text style={styles.typingHint} numberOfLines={1}>{typingHint}</Text>
+                  </View>
+                )
+              )}
+            </View>
           </TouchableOpacity>
         </View>
-        
+
         {/* 大屏幕 + 群聊时显示群信息按钮，否则显示三点菜单 */}
         {isWideScreen && isGroupChat && onGroupInfoPress ? (
           <TouchableOpacity
diff --git a/src/screens/message/components/ChatScreen/EmojiPanel.tsx b/src/screens/message/components/ChatScreen/EmojiPanel.tsx
index 6f8a2f6..ef9d899 100644
--- a/src/screens/message/components/ChatScreen/EmojiPanel.tsx
+++ b/src/screens/message/components/ChatScreen/EmojiPanel.tsx
@@ -74,7 +74,9 @@ export const EmojiPanel: React.FC<EmojiPanelProps> = ({
       ...baseStyles,
       emojiContainer: {
         flex: 1,
-        padding: spacing.sm,
+        paddingTop: spacing.sm,
+        paddingHorizontal: spacing.sm,
+        backgroundColor: baseStyles.panelContainer.backgroundColor,
       },
       emojiItem: {
         width: 40,
@@ -281,21 +283,19 @@ export const EmojiPanel: React.FC<EmojiPanelProps> = ({
     );
   };
 
-  // 渲染管理按钮（表情面板第一位）- 现代扁平化设计
+  // 渲染管理按钮（表情面板第一位）- 填满格子
   const renderManageButton = () => (
     <TouchableOpacity
       key="manage-button"
-      style={[styles.stickerItem, stickerButtonStyles.manageButton]}
+      style={[styles.stickerItem, { alignItems: 'center', justifyContent: 'center' }]}
       onPress={handleOpenManage}
       activeOpacity={0.7}
     >
-      <View style={stickerButtonStyles.iconContainer}>
-        <MaterialCommunityIcons
-          name="cog-outline"
-          size={28}
-          color={colors.chat.textSecondary}
-        />
-      </View>
+      <MaterialCommunityIcons
+        name="cog-outline"
+        size={32}
+        color={colors.chat.textSecondary}
+      />
     </TouchableOpacity>
   );
 
@@ -561,24 +561,28 @@ export const EmojiPanel: React.FC<EmojiPanelProps> = ({
         {activeTab === 'emoji' ? renderEmojiPanel() : renderStickerPanel()}
       </View>
 
-      {/* 底部 Tab 栏 - 现代胶囊式设计 */}
+      {/* 底部 Tab 栏 - QQ/微信风格横向导航 */}
       <View style={styles.panelTabBar}>
-        <View style={styles.panelTabContainer}>
+        <View style={styles.panelTabScroll}>
           <TouchableOpacity
-            style={[styles.panelTab, activeTab === 'emoji' && styles.panelTabActive]}
+            style={[styles.panelTabItem, activeTab === 'emoji' && styles.panelTabItemActive]}
             onPress={() => setActiveTab('emoji')}
             activeOpacity={0.8}
-          >
-            <Text style={[styles.panelTabEmoji, activeTab === 'emoji' ? { opacity: 1 } : {}]}>😊</Text>
-          </TouchableOpacity>
-          <TouchableOpacity
-            style={[styles.panelTab, activeTab === 'sticker' && styles.panelTabActive]}
-            onPress={() => setActiveTab('sticker')}
-            activeOpacity={0.8}
           >
             <MaterialCommunityIcons
               name="emoticon-happy-outline"
               size={22}
+              color={activeTab === 'emoji' ? colors.primary.main : colors.chat.textSecondary}
+            />
+          </TouchableOpacity>
+          <TouchableOpacity
+            style={[styles.panelTabItem, activeTab === 'sticker' && styles.panelTabItemActive]}
+            onPress={() => setActiveTab('sticker')}
+            activeOpacity={0.8}
+          >
+            <MaterialCommunityIcons
+              name="image-multiple-outline"
+              size={22}
               color={activeTab === 'sticker' ? colors.primary.main : colors.chat.textSecondary}
             />
           </TouchableOpacity>
diff --git a/src/screens/message/components/ChatScreen/styles.ts b/src/screens/message/components/ChatScreen/styles.ts
index 20f6f4d..ff2a25e 100644
--- a/src/screens/message/components/ChatScreen/styles.ts
+++ b/src/screens/message/components/ChatScreen/styles.ts
@@ -105,6 +105,12 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     backgroundColor: cardBgColor,
     height: 56,
   },
+  headerLeft: {
+    flexDirection: 'row',
+    alignItems: 'center',
+    gap: spacing.xs,
+    zIndex: 2,
+  },
   backButton: {
     width: 40,
     height: 40,
@@ -114,27 +120,21 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     padding: 0,
   },
   headerCenter: {
-    flex: 1,
+    position: 'absolute',
+    left: 0,
+    right: 0,
+    top: 0,
+    bottom: 0,
     alignItems: 'center',
-    marginHorizontal: spacing.sm,
+    justifyContent: 'center',
+    paddingHorizontal: 50,
   },
   titleRow: {
     flexDirection: 'row',
     alignItems: 'center',
-    gap: spacing.sm,
-    paddingHorizontal: spacing.sm,
     paddingVertical: spacing.xs,
     borderRadius: 8,
   },
-  titleLeading: {
-    width: 36,
-    height: 36,
-    borderRadius: 10,
-    alignItems: 'center',
-    justifyContent: 'center',
-    backgroundColor: panelBgColor,
-    overflow: 'hidden',
-  },
   groupAvatar: {
     width: 36,
     height: 36,
@@ -429,17 +429,17 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
   
   // 输入框区域 - 与列表背景同色底栏，顶部细分隔
   inputWrapper: {
-    backgroundColor: screenBgColor,
+    backgroundColor: cardBgColor,
     borderTopWidth: StyleSheet.hairlineWidth,
-    borderTopColor: colors.chat.border,
+    borderTopColor: colors.chat.borderHairline,
   },
   inputContainer: {
     backgroundColor: 'transparent',
     borderWidth: 0,
     borderRadius: 0,
     marginHorizontal: 10,
-    marginBottom: 10,
-    marginTop: 2,
+    marginBottom: 6,
+    marginTop: 6,
     paddingHorizontal: spacing.sm,
     paddingVertical: spacing.sm,
     shadowColor: 'transparent',
@@ -451,7 +451,7 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
   inputInner: {
     flexDirection: 'row',
     alignItems: 'center',
-    backgroundColor: inputBgColor,
+    backgroundColor: colors.chat.surfaceRaised,
     borderRadius: 20,
     paddingHorizontal: spacing.xs,
     paddingVertical: 4,
@@ -464,7 +464,7 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     elevation: 0,
   },
   inputInnerMuted: {
-    backgroundColor: colors.chat.borderHairline,
+    backgroundColor: colors.chat.surfaceMuted,
     opacity: 0.7,
   },
   
@@ -585,14 +585,9 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
   
   // 面板
   panelWrapper: {
-    backgroundColor: panelBgColor,
-    borderTopWidth: 1,
-    borderTopColor: colors.chat.border,
-    shadowColor: colors.chat.shadow,
-    shadowOffset: { width: 0, height: -2 },
-    shadowOpacity: 0.1,
-    shadowRadius: 8,
-    elevation: 8,
+    backgroundColor: cardBgColor,
+    borderTopWidth: StyleSheet.hairlineWidth,
+    borderTopColor: colors.chat.borderHairline,
   },
   // 表情面板包装器 - 底部 tab 栏是白色，安全区域也用白色填充
   emojiPanelWrapper: {
@@ -600,7 +595,11 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
   },
   panelContainer: {
     flex: 1,
-    backgroundColor: panelBgColor,
+    backgroundColor: cardBgColor,
+  },
+  morePanelBackground: {
+    flex: 1,
+    backgroundColor: cardBgColor,
   },
   
   // 表情面板
@@ -611,6 +610,7 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     paddingTop: spacing.md,
     paddingBottom: spacing.xl,
     alignItems: 'flex-start',
+    backgroundColor: cardBgColor,
   },
   emojiItem: {
     width: '12.5%',
@@ -636,55 +636,41 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     flex: 1,
   },
 
-  // Tab 栏 - 现代胶囊式设计
+  // Tab 栏 - 底部横向导航条（QQ/微信风格）
   panelTabBar: {
     flexDirection: 'row',
     alignItems: 'center',
     justifyContent: 'space-between',
-    paddingHorizontal: spacing.md,
-    paddingVertical: spacing.sm + 2,
+    paddingHorizontal: 0,
+    paddingVertical: 0,
+    backgroundColor: cardBgColor,
     borderTopWidth: StyleSheet.hairlineWidth,
     borderTopColor: colors.chat.borderHairline,
-    backgroundColor: cardBgColor,
   },
-  panelTabContainer: {
+  panelTabScroll: {
+    flex: 1,
     flexDirection: 'row',
     alignItems: 'center',
-    backgroundColor: panelBgColor,
-    borderRadius: 12,
-    padding: 3,
+    paddingHorizontal: spacing.sm,
+    gap: spacing.sm,
   },
-  panelTab: {
-    width: 42,
-    height: 36,
+  panelTabItem: {
     alignItems: 'center',
     justifyContent: 'center',
-    borderRadius: 10,
+    width: 48,
+    height: 44,
+    borderBottomWidth: 2.5,
+    borderBottomColor: 'transparent',
   },
-  panelTabActive: {
-    backgroundColor: cardBgColor,
-    shadowColor: colors.chat.shadow,
-    shadowOffset: { width: 0, height: 1 },
-    shadowOpacity: 0.08,
-    shadowRadius: 2,
-    elevation: 1,
-  },
-  panelTabEmoji: {
-    fontSize: 22,
-  },
-  panelTabDivider: {
-    width: 1,
-    height: 20,
-    backgroundColor: colors.chat.border,
-    marginHorizontal: spacing.sm,
+  panelTabItemActive: {
+    borderBottomColor: colors.primary.main,
   },
   panelCloseButton: {
-    width: 36,
-    height: 36,
+    width: 44,
+    height: 44,
     alignItems: 'center',
     justifyContent: 'center',
-    borderRadius: 10,
-    backgroundColor: panelBgColor,
+    marginRight: spacing.sm,
   },
 
   // 自定义表情面板
@@ -692,12 +678,14 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     flex: 1,
     justifyContent: 'center',
     alignItems: 'center',
+    backgroundColor: cardBgColor,
   },
   stickerEmptyContainer: {
     flex: 1,
     justifyContent: 'center',
     alignItems: 'center',
     padding: spacing.xl,
+    backgroundColor: cardBgColor,
   },
   stickerEmptyText: {
     fontSize: 16,
@@ -715,6 +703,7 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     paddingHorizontal: spacing.md,
     paddingTop: spacing.md,
     paddingBottom: spacing.xl,
+    backgroundColor: cardBgColor,
   },
   stickerItem: {
     width: (SCREEN_WIDTH - spacing.md * 2) / 4 - 8,
@@ -734,9 +723,10 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     flexDirection: 'row',
     flexWrap: 'wrap',
     paddingHorizontal: spacing.lg + 4,
-    paddingTop: spacing.lg,
+    paddingTop: spacing.md,
     paddingBottom: spacing.xl,
     justifyContent: 'flex-start',
+    backgroundColor: cardBgColor,
   },
   moreItem: {
     width: (SCREEN_WIDTH - spacing.lg * 2 - 8) / 4,
@@ -779,12 +769,6 @@ export function createChatScreenStyles(colors: AppColors, dynamicStyles?: {
     fontWeight: '500',
     letterSpacing: 0.3,
   },
-  // MorePanel 整体背景
-  morePanelBackground: {
-    flex: 1,
-    backgroundColor: panelBgColor,
-  },
-  
   // @成员选择浮层 - 绝对定位浮在输入框上方
   mentionPanelFloat: {
     position: 'absolute',
diff --git a/src/screens/profile/AboutScreen.tsx b/src/screens/profile/AboutScreen.tsx
index ad0d18e..f6a9ef2 100644
--- a/src/screens/profile/AboutScreen.tsx
+++ b/src/screens/profile/AboutScreen.tsx
@@ -524,9 +524,6 @@ export const AboutScreen: React.FC = () => {
       >
         <View style={styles.content}>
           <View style={styles.header}>
-            <View style={styles.logoContainer}>
-              <Text style={styles.logoText}>萝卜</Text>
-            </View>
             <Text style={styles.appName}>{APP_NAME}</Text>
             <Text style={styles.appSlogan}>{APP_SLOGAN}</Text>
             <Text style={styles.versionText}>版本 {APP_VERSION}</Text>
diff --git a/src/screens/profile/PrivacyPolicyScreen.tsx b/src/screens/profile/PrivacyPolicyScreen.tsx
index 76f3e31..8d8a4bf 100644
--- a/src/screens/profile/PrivacyPolicyScreen.tsx
+++ b/src/screens/profile/PrivacyPolicyScreen.tsx
@@ -52,12 +52,8 @@ const PRIVACY_SECTIONS = [
 1.2 我们在您使用服务时收集的信息
 • 设备信息：包括设备型号、操作系统版本、设备设置、唯一设备标识符（如IMEI、Android ID、IDFA、OAID、MAC地址等）、IP地址等
 • 日志信息：IP地址、访问时间、浏览记录、操作日志等
-• 位置信息：为了向您提供"校园圈"、"附近的人"等基于位置的服务，经您授权，我们会收集您的精确地理位置信息。该信息属于敏感个人信息，拒绝提供仅会影响相关功能，不影响其他服务的使用
 • 相机/相册权限：用于发布动态、更换头像。我们仅在您主动触发相关功能时申请权限，且不会在后台持续收集
-• 通讯录权限：经您授权后用于查找好友
-
-1.3 从第三方获取的信息
-如您使用第三方账号登录功能（具体以应用实际提供的登录方式为准），我们会从第三方获取您授权共享的账号信息（如昵称、头像等）。`,
+• 通讯录权限：经您授权后用于查找好友`,
   },
   {
     title: '二、我们如何使用信息',
diff --git a/src/screens/profile/PrivacySettingsScreen.tsx b/src/screens/profile/PrivacySettingsScreen.tsx
index 0ae3a08..ce66ff2 100644
--- a/src/screens/profile/PrivacySettingsScreen.tsx
+++ b/src/screens/profile/PrivacySettingsScreen.tsx
@@ -18,10 +18,10 @@ import type { PrivacySettingsDTO, VisibilityLevel } from '../../types/dto';
 
 const CONTENT_MAX_WIDTH = 720;
 
-const VISIBILITY_OPTIONS: { value: VisibilityLevel; label: string; description: string }[] = [
-  { value: 'everyone', label: '所有人可见', description: '任何人都可查看' },
-  { value: 'following', label: '仅关注的人可见', description: '只有你关注的人可查看' },
-  { value: 'self', label: '仅自己可见', description: '只有自己可查看' },
+const VISIBILITY_OPTIONS: { value: VisibilityLevel; label: string }[] = [
+  { value: 'everyone', label: '所有人可见' },
+  { value: 'following', label: '仅关注的人可见' },
+  { value: 'self', label: '仅自己可见' },
 ];
 
 const PRIVACY_ITEMS: { key: keyof PrivacySettingsDTO; title: string; description: string }[] = [
@@ -65,55 +65,78 @@ function createPrivacySettingsStyles(colors: AppColors) {
       textTransform: 'uppercase',
       letterSpacing: 0.5,
     },
-    // 隐私设置项 - 扁平化卡片风格
+    // 扁平式布局：整行横向排列，底部边框分隔
     item: {
-      backgroundColor: colors.background.default,
-      borderRadius: 14,
-      padding: spacing.lg,
-      marginHorizontal: spacing['2xl'],
-      marginBottom: spacing.md,
-    },
-    itemHeader: {
       flexDirection: 'row',
       alignItems: 'center',
       justifyContent: 'space-between',
-      marginBottom: spacing.sm,
+      paddingVertical: spacing.lg,
+      marginHorizontal: spacing['2xl'],
+      borderBottomWidth: StyleSheet.hairlineWidth,
+      borderBottomColor: colors.divider,
+    },
+    itemLast: {
+      borderBottomWidth: 0,
+    },
+    itemTextWrap: {
+      flex: 1,
+      marginRight: spacing.md,
     },
     itemTitle: {
       fontWeight: '600',
       fontSize: fontSizes.md,
       color: colors.text.primary,
+      marginBottom: spacing.xs,
     },
     itemDescription: {
       fontSize: fontSizes.sm,
       color: colors.text.secondary,
-      marginBottom: spacing.md,
     },
-    optionsRow: {
+    // 无背景色的选择框，紧贴右侧
+    selectBox: {
       flexDirection: 'row',
-      flexWrap: 'wrap',
-      gap: spacing.sm,
+      alignItems: 'center',
+      paddingVertical: spacing.xs,
     },
-    // 选项按钮 - 扁平化风格
-    optionButton: {
+    selectBoxText: {
+      fontSize: fontSizes.sm,
+      color: colors.text.secondary,
+      marginRight: spacing.xs,
+    },
+    // 原位展开的下拉菜单
+    dropdownMenu: {
+      position: 'absolute',
+      right: 0,
+      top: '100%',
+      marginTop: 4,
+      backgroundColor: colors.background.paper,
+      borderRadius: borderRadius.md,
+      borderWidth: StyleSheet.hairlineWidth,
+      borderColor: colors.divider,
+      shadowColor: '#000',
+      shadowOffset: { width: 0, height: 2 },
+      shadowOpacity: 0.1,
+      shadowRadius: 4,
+      elevation: 4,
+      zIndex: 100,
+      minWidth: 160,
+    },
+    dropdownOption: {
       paddingHorizontal: spacing.md,
       paddingVertical: spacing.sm,
-      borderRadius: borderRadius.full,
-      borderWidth: 1,
-      borderColor: colors.divider,
-      backgroundColor: colors.background.paper,
+      borderBottomWidth: StyleSheet.hairlineWidth,
+      borderBottomColor: colors.divider,
     },
-    optionButtonActive: {
-      backgroundColor: colors.primary.main,
-      borderColor: colors.primary.main,
+    dropdownOptionLast: {
+      borderBottomWidth: 0,
     },
-    optionText: {
-      fontSize: 13,
+    dropdownOptionText: {
+      fontSize: fontSizes.sm,
       color: colors.text.primary,
     },
-    optionTextActive: {
-      color: colors.text.inverse,
-      fontWeight: '500',
+    dropdownOptionTextActive: {
+      color: colors.primary.main,
+      fontWeight: '600',
     },
   });
 }
@@ -127,6 +150,7 @@ export const PrivacySettingsScreen: React.FC = () => {
   const [settings, setSettings] = useState<PrivacySettingsDTO | null>(null);
   const [loading, setLoading] = useState(true);
   const [saving, setSaving] = useState(false);
+  const [openPicker, setOpenPicker] = useState<keyof PrivacySettingsDTO | null>(null);
   const responsivePadding = useResponsiveSpacing({ xs: 8, sm: 12, md: 16, lg: 24, xl: 32 });
 
   const scrollBottomInset = isMobile ? 64 + 24 + insets.bottom + spacing.md : spacing.md;
@@ -150,10 +174,10 @@ export const PrivacySettingsScreen: React.FC = () => {
 
   const updateSetting = useCallback(async (key: keyof PrivacySettingsDTO, value: VisibilityLevel) => {
     if (!settings) return;
-    
+
     const newSettings = { ...settings, [key]: value };
     setSettings(newSettings);
-    
+
     setSaving(true);
     try {
       const ok = await authService.updatePrivacySettings({
@@ -171,6 +195,9 @@ export const PrivacySettingsScreen: React.FC = () => {
     }
   }, [settings]);
 
+  const getLabel = (value?: VisibilityLevel) =>
+    VISIBILITY_OPTIONS.find((o) => o.value === value)?.label ?? '请选择';
+
   if (loading) {
     return (
       <SafeAreaView style={styles.container} edges={['bottom']}>
@@ -186,42 +213,75 @@ export const PrivacySettingsScreen: React.FC = () => {
       <ScrollView contentContainerStyle={[styles.scrollContent, { paddingBottom: scrollBottomInset, paddingHorizontal: responsivePadding }]}>
         <View style={styles.content}>
           <View style={styles.section}>
-            <View style={styles.sectionHeader}>
-              <Text variant="caption" style={styles.sectionTitle}>
-                隐私设置
-              </Text>
-            </View>
-            
-            {PRIVACY_ITEMS.map((item) => (
-              <View key={item.key} style={styles.item}>
-                <Text variant="body" style={styles.itemTitle}>
-                  {item.title}
-                </Text>
-                <Text variant="caption" color={colors.text.secondary} style={styles.itemDescription}>
-                  {item.description}
-                </Text>
-                <View style={styles.optionsRow}>
-                  {VISIBILITY_OPTIONS.map((option) => {
-                    const isActive = settings?.[item.key] === option.value;
-                    return (
-                      <TouchableOpacity
-                        key={option.value}
-                        style={[styles.optionButton, isActive && styles.optionButtonActive]}
-                        onPress={() => updateSetting(item.key, option.value)}
-                        activeOpacity={0.7}
-                      >
-                        <Text
-                          variant="caption"
-                          style={[styles.optionText, isActive ? styles.optionTextActive : {}]}
-                        >
-                          {option.label}
-                        </Text>
-                      </TouchableOpacity>
-                    );
-                  })}
+            {PRIVACY_ITEMS.map((item, index) => {
+              const isOpen = openPicker === item.key;
+              return (
+                <View
+                  key={item.key}
+                  style={[
+                    styles.item,
+                    index === PRIVACY_ITEMS.length - 1 && styles.itemLast,
+                  ]}
+                >
+                  <View style={styles.itemTextWrap}>
+                    <Text variant="body" style={styles.itemTitle}>
+                      {item.title}
+                    </Text>
+                    <Text variant="caption" color={colors.text.secondary} style={styles.itemDescription}>
+                      {item.description}
+                    </Text>
+                  </View>
+
+                  <TouchableOpacity
+                    style={styles.selectBox}
+                    onPress={() => setOpenPicker(isOpen ? null : item.key)}
+                    activeOpacity={0.7}
+                  >
+                    <Text style={styles.selectBoxText}>
+                      {getLabel(settings?.[item.key])}
+                    </Text>
+                    <MaterialCommunityIcons
+                      name={isOpen ? 'chevron-up' : 'chevron-down'}
+                      size={18}
+                      color={colors.text.secondary}
+                    />
+                  </TouchableOpacity>
+
+                  {/* 原位展开的下拉选项 */}
+                  {isOpen && (
+                    <View style={styles.dropdownMenu}>
+                      {VISIBILITY_OPTIONS.map((option, optIndex) => {
+                        const isActive = settings?.[item.key] === option.value;
+                        return (
+                          <TouchableOpacity
+                            key={option.value}
+                            style={[
+                              styles.dropdownOption,
+                              optIndex === VISIBILITY_OPTIONS.length - 1 && styles.dropdownOptionLast,
+                            ]}
+                            onPress={() => {
+                              updateSetting(item.key, option.value);
+                              setOpenPicker(null);
+                            }}
+                            activeOpacity={0.7}
+                          >
+                            <Text
+                              variant="body"
+                              style={[
+                                styles.dropdownOptionText,
+                                isActive ? styles.dropdownOptionTextActive : undefined,
+                              ]}
+                            >
+                              {option.label}
+                            </Text>
+                          </TouchableOpacity>
+                        );
+                      })}
+                    </View>
+                  )}
                 </View>
-              </View>
-            ))}
+              );
+            })}
           </View>
         </View>
       </ScrollView>
diff --git a/src/screens/trade/CreateTradeScreen.tsx b/src/screens/trade/CreateTradeScreen.tsx
index 34ae0fd..e1a846b 100644
--- a/src/screens/trade/CreateTradeScreen.tsx
+++ b/src/screens/trade/CreateTradeScreen.tsx
@@ -466,9 +466,9 @@ export function CreateTradeScreen({ onClose, onSuccess, editItem }: CreateTradeS
           >
             {/* 标题区域 */}
             <View style={styles.titleSection}>
-              <Text style={styles.title}>{isEdit ? '编辑商品' : '发布商品'}</Text>
+              <Text style={styles.title}>{isEdit ? '编辑' + (tradeType === 'buy' ? '收购' : '商品') : '发布' + (tradeType === 'buy' ? '收购' : '商品')}</Text>
               <View style={styles.underline} />
-              <Text style={styles.subtitle}>填写商品信息，让更多人看到</Text>
+              <Text style={styles.subtitle}>{tradeType === 'buy' ? '填写收购需求，让卖家主动联系你' : '填写商品信息，让更多人看到'}</Text>
             </View>
 
             {/* 交易类型 */}
@@ -520,7 +520,7 @@ export function CreateTradeScreen({ onClose, onSuccess, editItem }: CreateTradeS
                   style={styles.input}
                   value={title}
                   onChangeText={setTitle}
-                  placeholder="描述你的商品"
+                  placeholder={tradeType === 'buy' ? '描述你想收购的商品' : '描述你的商品'}
                   placeholderTextColor={colors.text.hint}
                   maxLength={100}
                   cursorColor={colors.primary.main}
@@ -541,7 +541,7 @@ export function CreateTradeScreen({ onClose, onSuccess, editItem }: CreateTradeS
                   style={[styles.input, styles.textArea]}
                   value={content}
                   onChangeText={setContent}
-                  placeholder="详细描述商品情况..."
+                  placeholder={tradeType === 'buy' ? '详细描述收购需求、预算、成色要求等...' : '详细描述商品情况...'}
                   placeholderTextColor={colors.text.hint}
                   multiline
                   maxLength={2000}
diff --git a/src/screens/trade/TradeDetailScreen.tsx b/src/screens/trade/TradeDetailScreen.tsx
index 9a26ce9..f2f29ba 100644
--- a/src/screens/trade/TradeDetailScreen.tsx
+++ b/src/screens/trade/TradeDetailScreen.tsx
@@ -120,6 +120,11 @@ function createStyles(colors: AppColors) {
       fontWeight: '700',
       color: '#FF4D4F',
     },
+    priceSymbol: {
+      fontSize: fontSizes.md,
+      fontWeight: '700',
+      color: '#FF4D4F',
+    },
 
     titleRow: {
       flexDirection: 'row',
@@ -330,6 +335,17 @@ function createStyles(colors: AppColors) {
       color: colors.text.primary,
       fontWeight: '600',
     },
+    contentAttrs: {
+      flexDirection: 'row',
+      justifyContent: 'flex-end',
+      alignItems: 'center',
+      gap: spacing.md,
+      flexWrap: 'wrap',
+    },
+    contentAttrText: {
+      fontSize: fontSizes.sm,
+      color: colors.text.secondary,
+    },
   });
 }
 
@@ -496,7 +512,7 @@ export function TradeDetailScreen({ tradeId }: TradeDetailScreenProps) {
                 </View>
                 {item.price != null ? (
                   <Text style={styles.priceInHeader}>
-                    价格：¥{item.price % 1 === 0 ? item.price.toFixed(0) : item.price.toFixed(2)}
+                    价格：<Text style={styles.priceSymbol}>¥</Text>{item.price % 1 === 0 ? item.price.toFixed(0) : item.price.toFixed(2)}
                   </Text>
                 ) : (
                   <Text style={styles.priceInHeader}>价格：面议</Text>
@@ -509,41 +525,12 @@ export function TradeDetailScreen({ tradeId }: TradeDetailScreenProps) {
           {/* 标题 */}
           <View style={styles.titleRow}>
             <Text style={styles.title} numberOfLines={2}>{item.title}</Text>
-            {item.condition && item.trade_type === 'sell' && (
-              <View style={{ flexShrink: 0, marginTop: 7, marginLeft: 'auto' }}>
-                <View style={styles.conditionBadge}>
-                  <Text style={styles.conditionBadgeText} numberOfLines={1}>
-                    {TRADE_CONDITION_MAP[item.condition as keyof typeof TRADE_CONDITION_MAP] || item.condition}
-                  </Text>
-                </View>
-              </View>
-            )}
-          </View>
-
-          {/* 商品属性 */}
-          <View style={styles.attrGrid}>
-            <View style={styles.attrItem}>
-              <Text style={styles.attrLabel}>品牌</Text>
-              <Text style={styles.attrValue}>{item.brand || '其他'}</Text>
-            </View>
-            <View style={styles.attrItem}>
-              <Text style={styles.attrLabel}>成色</Text>
-              <Text style={styles.attrValue}>
-                {TRADE_CONDITION_MAP[item.condition as keyof typeof TRADE_CONDITION_MAP] || item.condition || '未知'}
-              </Text>
-            </View>
-            <View style={styles.attrItem}>
-              <Text style={styles.attrLabel}>功能状态</Text>
-              <Text style={styles.attrValue}>{item.function_status || '正常使用'}</Text>
-            </View>
           </View>
 
           {/* 商品描述 */}
           {item.content && (
             <Text style={styles.contentText}>{item.content}</Text>
           )}
-
-          <View style={styles.divider} />
         </View>
 
         {/* 图片放在文字下方 */}
@@ -555,11 +542,23 @@ export function TradeDetailScreen({ tradeId }: TradeDetailScreenProps) {
                   source={{ uri: img.url || img.preview_url_large || img.preview_url || '' }}
                   style={styles.image}
                 />
-
               </View>
             ))}
           </View>
         )}
+
+        {/* 内容区右下角属性文字（仅出售商品显示） */}
+        {item.trade_type === 'sell' && (
+          <View style={{ paddingHorizontal: spacing.md, paddingBottom: spacing.md }}>
+            <View style={styles.contentAttrs}>
+              <Text style={styles.contentAttrText}>品牌：{item.brand || '其他'}</Text>
+              <Text style={styles.contentAttrText}>
+                成色：{TRADE_CONDITION_MAP[item.condition as keyof typeof TRADE_CONDITION_MAP] || item.condition || '未知'}
+              </Text>
+              <Text style={styles.contentAttrText}>功能状态：{item.function_status || '正常使用'}</Text>
+            </View>
+          </View>
+        )}
       </ScrollView>
 
       {/* 底部操作栏 */}