diff --git a/CLAUDE.md b/CLAUDE.md
index 9a09e15..a0fe622 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -68,10 +68,14 @@ client/src/
 │   ├── stats/          # 统计分析
 │   ├── bills/          # 全部账单 (下拉刷新/上拉加载)
 │   ├── profile/        # 我的（身份切换入口）
-│   ├── profile-edit/   # 编辑资料（昵称+头像）
+│   ├── profile-edit/   # 编辑资料（昵称+头像+签名）
 │   ├── group-manage/   # 群组管理（创建/加入/退出/解散）
 │   ├── category-manage/ # 分类管理
-│   └── budget/         # 预算设置
+│   ├── budget/         # 预算设置
+│   ├── notifications/  # 通知中心
+│   ├── feedback/       # 意见反馈
+│   ├── privacy/        # 隐私政策
+│   └── admin/          # 管理后台 (index/users/notifications/feedback/config)
 ├── components/         # 公共组件
 │   ├── BudgetBar/      # 预算进度条
 │   ├── CategoryIcon/   # 分类图标 (首字+颜色)
@@ -96,6 +100,11 @@ client/src/
 │   ├── stats.ts        # 统计接口
 │   ├── user.ts         # 用户信息接口 (含头像上传)
 │   ├── group.ts        # 群组接口
+│   ├── notification.ts # 通知接口
+│   ├── filter.ts       # 筛选方案接口
+│   ├── feedback.ts     # 反馈接口
+│   ├── config.ts       # 系统配置接口
+│   ├── admin.ts        # 管理后台接口
 │   └── index.ts        # barrel 导出
 ├── utils/
 │   ├── format.ts       # 金额/日期格式化
@@ -116,6 +125,11 @@ server/src/
 │   ├── stats.ts        # 统计查询 (支持 group_id)
 │   ├── user.ts         # 用户信息 + 头像上传
 │   ├── group.ts        # 群组 CRUD (创建/加入/退出/解散)
+│   ├── notification.ts # 通知/公告 CRUD
+│   ├── filter.ts       # 筛选方案 CRUD
+│   ├── feedback.ts     # 用户反馈 (提交/查询/处理)
+│   ├── config.ts       # 系统配置 (公开读/管理员写)
+│   ├── admin.ts        # 管理后台 (仪表盘/用户管理)
 │   └── backup.ts       # 备份 API
 ├── utils/
 │   ├── backup.ts       # Node.js 数据库备份 (gzip)
@@ -124,16 +138,21 @@ server/src/
     ├── connection.ts   # MySQL 连接池
     ├── init.ts         # 建表 + seed + 迁移 (幂等)
     ├── schema.sql      # 表结构
-    └── seed.sql        # 默认分类数据
+    └── seed.sql        # 默认分类数据 + 系统配置
 ```
 
 ### 数据库表
-- `users` — 用户 (openid, nickname, avatar_url)
+- `users` — 用户 (openid, nickname, avatar_url, slogan, role)
 - `categories` — 分类 (user_id=0 默认, 其他=自定义)
 - `transactions` — 交易记录 (user_id, group_id, amount 分)
 - `budgets` — 预算 (user_id, month, amount)
 - `groups` — 群组 (name, invite_code, created_by)
 - `group_members` — 群组成员 (group_id, user_id, role)
+- `notifications` — 通知/公告 (type, title, content, is_pinned, is_urgent)
+- `notification_reads` — 公告已读记录 (notification_id, user_id)
+- `saved_filters` — 保存的筛选方案 (user_id, name, filters)
+- `feedbacks` — 用户反馈 (user_id, type, content, status)
+- `sys_config` — 系统配置 (config_key, config_value)
 
 ### 金额处理
 - 存储单位: 分 (整数，避免浮点精度问题)
diff --git a/client/src/api/config.ts b/client/src/api/config.ts
new file mode 100644
index 0000000..63f69b6
--- /dev/null
+++ b/client/src/api/config.ts
@@ -0,0 +1,11 @@
+import { request } from '@/utils/request'
+
+/** 获取系统配置 */
+export function getConfig(): Promise<Record<string, string>> {
+  return request('/config')
+}
+
+/** 更新系统配置（管理员） */
+export function updateConfig(data: Record<string, string>) {
+  return request('/config', { method: 'PUT', data })
+}
diff --git a/client/src/api/user.ts b/client/src/api/user.ts
index 39fdfbb..e77d21d 100644
--- a/client/src/api/user.ts
+++ b/client/src/api/user.ts
@@ -6,6 +6,7 @@ export interface UserInfo {
   id: number
   nickname: string
   avatar_url: string
+  slogan: string
   role: 'user' | 'admin'
   created_at: string
 }
@@ -15,9 +16,11 @@ export function getUserInfo() {
   return request<UserInfo>({ url: '/user/me' })
 }
 
-/** 更新昵称 */
-export function updateNickname(nickname: string) {
-  return request({ url: '/user/me', method: 'PUT', data: { nickname } })
+/** 更新昵称/签名 */
+export function updateNickname(nickname: string, slogan?: string) {
+  const data: any = { nickname }
+  if (slogan !== undefined) data.slogan = slogan
+  return request({ url: '/user/me', method: 'PUT', data })
 }
 
 /** 上传头像（返回新 URL） */
diff --git a/client/src/pages.json b/client/src/pages.json
index c03dba8..e0b8cbc 100644
--- a/client/src/pages.json
+++ b/client/src/pages.json
@@ -117,6 +117,13 @@
         "navigationStyle": "custom",
         "navigationBarTitleText": "反馈管理"
       }
+    },
+    {
+      "path": "pages/admin/config",
+      "style": {
+        "navigationStyle": "custom",
+        "navigationBarTitleText": "系统配置"
+      }
     }
   ],
   "globalStyle": {
diff --git a/client/src/pages/admin/config.vue b/client/src/pages/admin/config.vue
new file mode 100644
index 0000000..99d6c3f
--- /dev/null
+++ b/client/src/pages/admin/config.vue
@@ -0,0 +1,239 @@
+<template>
+  <view class="page">
+    <view class="header-fixed">
+      <view class="status-bar" :style="{ height: statusBarHeight + 'px' }"></view>
+      <view class="nav-bar">
+        <view class="nav-back" @tap="goBack">
+          <Icon name="arrowLeft" :size="40" color="#2D1B1B" />
+        </view>
+        <text class="nav-title">系统配置</text>
+        <view class="nav-save" @tap="saveConfig">
+          <text class="save-text">保存</text>
+        </view>
+      </view>
+    </view>
+
+    <view class="content" v-if="!loading">
+      <view class="config-card">
+        <text class="card-title">应用信息</text>
+
+        <view class="config-item">
+          <text class="config-label">版本号</text>
+          <input class="config-input" v-model="form.app_version" placeholder="如 1.0.0" />
+        </view>
+
+        <view class="config-divider"></view>
+
+        <view class="config-item">
+          <text class="config-label">标语</text>
+          <input class="config-input" v-model="form.app_slogan" placeholder="温暖 x 轻松的个人记账小程序" />
+        </view>
+
+        <view class="config-divider"></view>
+
+        <view class="config-item">
+          <text class="config-label">描述</text>
+          <input class="config-input" v-model="form.app_description" placeholder="让记账从负担变成享受" />
+        </view>
+      </view>
+
+      <view class="tips-card">
+        <text class="tips-title">说明</text>
+        <text class="tips-text">• 版本号会显示在「关于小菜」弹窗中</text>
+        <text class="tips-text">• 标语和描述会显示在「关于小菜」弹窗中</text>
+      </view>
+    </view>
+
+    <view v-else class="loading-box">
+      <text class="loading-text">加载中...</text>
+    </view>
+  </view>
+</template>
+
+<script setup lang="ts">
+import { ref, reactive, onMounted } from 'vue'
+import { waitForReady } from '@/utils/app-ready'
+import { statusBarHeight } from '@/utils/system'
+import { getConfig, updateConfig } from '@/api/config'
+import Icon from '@/components/Icon/Icon.vue'
+
+const loading = ref(true)
+const saving = ref(false)
+
+const form = reactive({
+  app_version: '',
+  app_slogan: '',
+  app_description: ''
+})
+
+onMounted(async () => {
+  await waitForReady()
+  try {
+    const config = await getConfig()
+    form.app_version = config.app_version || '1.0.0'
+    form.app_slogan = config.app_slogan || ''
+    form.app_description = config.app_description || ''
+  } catch (e: any) {
+    uni.showToast({ title: e.message || '加载失败', icon: 'none' })
+  } finally {
+    loading.value = false
+  }
+})
+
+async function saveConfig() {
+  if (saving.value) return
+
+  if (!form.app_version.trim()) {
+    uni.showToast({ title: '请输入版本号', icon: 'none' })
+    return
+  }
+
+  saving.value = true
+  try {
+    await updateConfig({
+      app_version: form.app_version.trim(),
+      app_slogan: form.app_slogan.trim(),
+      app_description: form.app_description.trim()
+    })
+    uni.showToast({ title: '保存成功', icon: 'success' })
+    setTimeout(() => uni.navigateBack(), 1500)
+  } catch (e: any) {
+    uni.showToast({ title: e.message || '保存失败', icon: 'none' })
+  } finally {
+    saving.value = false
+  }
+}
+
+function goBack() {
+  uni.navigateBack()
+}
+</script>
+
+<style lang="scss" scoped>
+@import '@/styles/mixins.scss';
+
+.page {
+  min-height: 100vh;
+  background: $bg;
+}
+
+.header-fixed {
+  @include sticky-header;
+}
+
+.status-bar { @include status-bar; }
+
+.nav-bar {
+  display: flex;
+  align-items: center;
+  padding: $space-sm $space-xl $space-md;
+}
+
+.nav-back { @include nav-back; }
+
+.nav-title {
+  flex: 1;
+  text-align: center;
+  font-size: $font-2xl;
+  font-weight: 600;
+  color: $text;
+}
+
+.nav-save {
+  width: 88rpx;
+  height: 88rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  &:active { opacity: 0.6; }
+}
+
+.save-text {
+  font-size: $font-lg;
+  font-weight: 600;
+  color: $primary;
+}
+
+.content {
+  padding: $space-lg $space-xl;
+}
+
+.config-card {
+  background: $surface;
+  border-radius: $radius-2xl;
+  border: 2rpx solid $border;
+  box-shadow: $shadow-md;
+  overflow: hidden;
+  margin-bottom: $space-lg;
+}
+
+.card-title {
+  font-size: $font-lg;
+  font-weight: 600;
+  color: $text;
+  display: block;
+  padding: $space-lg $space-xl $space-sm;
+}
+
+.config-item {
+  display: flex;
+  align-items: center;
+  padding: $space-lg $space-xl;
+}
+
+.config-label {
+  width: 120rpx;
+  font-size: $font-lg;
+  font-weight: 500;
+  color: $text;
+  flex-shrink: 0;
+}
+
+.config-input {
+  flex: 1;
+  font-size: $font-lg;
+  color: $text;
+}
+
+.config-divider {
+  height: 2rpx;
+  background: $border;
+  margin: 0 $space-xl;
+}
+
+.tips-card {
+  padding: $space-lg $space-xl;
+  background: $surface;
+  border-radius: $radius-2xl;
+  border: 2rpx solid $border;
+  box-shadow: $shadow-md;
+}
+
+.tips-title {
+  font-size: $font-lg;
+  font-weight: 600;
+  color: $text;
+  display: block;
+  margin-bottom: $space-sm;
+}
+
+.tips-text {
+  font-size: $font-md;
+  color: $text-sec;
+  display: block;
+  margin-bottom: $space-xs;
+}
+
+.loading-box {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 120rpx 0;
+}
+
+.loading-text {
+  font-size: $font-lg;
+  color: $text-muted;
+}
+</style>
diff --git a/client/src/pages/admin/index.vue b/client/src/pages/admin/index.vue
index bdab582..60c0655 100644
--- a/client/src/pages/admin/index.vue
+++ b/client/src/pages/admin/index.vue
@@ -77,6 +77,11 @@
           <text class="entry-text">反馈管理</text>
           <Icon name="chevronRight" :size="24" color="#BFB3B3" />
         </view>
+        <view class="entry-item" @tap="goConfig">
+          <Icon name="settings" :size="32" color="#FF8C69" />
+          <text class="entry-text">系统配置</text>
+          <Icon name="chevronRight" :size="24" color="#BFB3B3" />
+        </view>
       </view>
     </view>
   </view>
@@ -120,6 +125,7 @@ function goBack() { uni.navigateBack() }
 function goUsers() { uni.navigateTo({ url: '/pages/admin/users' }) }
 function goNotificationManage() { uni.navigateTo({ url: '/pages/admin/notifications' }) }
 function goFeedbackManage() { uni.navigateTo({ url: '/pages/admin/feedback' }) }
+function goConfig() { uni.navigateTo({ url: '/pages/admin/config' }) }
 </script>
 
 <style lang="scss" scoped>
diff --git a/client/src/pages/profile-edit/index.vue b/client/src/pages/profile-edit/index.vue
index aeb3246..38464d6 100644
--- a/client/src/pages/profile-edit/index.vue
+++ b/client/src/pages/profile-edit/index.vue
@@ -29,11 +29,17 @@
         <text class="form-label">昵称</text>
         <input class="form-input" v-model="formNickname" placeholder="请输入昵称" maxlength="50" />
       </view>
+      <view class="form-divider"></view>
+      <view class="form-item">
+        <text class="form-label">签名</text>
+        <input class="form-input" v-model="formSlogan" placeholder="写一句个性签名吧" maxlength="100" />
+      </view>
     </view>
 
     <view class="tips-card">
       <text class="tips-title">提示</text>
       <text class="tips-text">• 昵称最长 50 个字符</text>
+      <text class="tips-text">• 签名最长 100 个字符</text>
       <text class="tips-text">• 头像支持 JPG、PNG、WebP 格式，最大 2MB</text>
     </view>
   </view>
@@ -48,6 +54,7 @@ import Icon from '@/components/Icon/Icon.vue'
 
 const userStore = useUserStore()
 const formNickname = ref('')
+const formSlogan = ref('')
 const previewUrl = ref('')
 const uploading = ref(false)
 const saving = ref(false)
@@ -55,6 +62,7 @@ const saving = ref(false)
 onMounted(async () => {
   await waitForReady()
   formNickname.value = userStore.nickname
+  formSlogan.value = userStore.slogan
   previewUrl.value = userStore.avatarUrl
 })
 
@@ -93,7 +101,10 @@ async function saveProfile() {
   }
   saving.value = true
   try {
-    await userStore.updateProfile(nickname)
+    await userStore.updateProfile({
+      nickname,
+      slogan: formSlogan.value.trim()
+    })
     uni.showToast({ title: '保存成功', icon: 'success' })
     setTimeout(() => uni.navigateBack(), 1500)
   } catch {
@@ -207,6 +218,12 @@ async function saveProfile() {
   padding: $space-lg $space-xl;
 }
 
+.form-divider {
+  height: 2rpx;
+  background: $border;
+  margin: 0 $space-xl;
+}
+
 .form-label {
   width: 120rpx;
   font-size: $font-lg;
diff --git a/client/src/pages/profile/index.vue b/client/src/pages/profile/index.vue
index 9516e41..1aa1d51 100644
--- a/client/src/pages/profile/index.vue
+++ b/client/src/pages/profile/index.vue
@@ -12,7 +12,7 @@
       </view>
       <view class="p-info">
         <text class="p-name">{{ userStore.nickname }}</text>
-        <text class="p-tagline">记账小能手</text>
+        <text class="p-tagline">{{ userStore.slogan }}</text>
         <text class="p-streak">累计 {{ txStore.total }} 笔记录</text>
       </view>
       <Icon name="chevronRight" :size="28" color="rgba(255,255,255,0.6)" />
@@ -85,9 +85,9 @@
     <view class="modal-mask" v-if="showAbout" @tap="showAbout = false">
       <view class="modal" @tap.stop>
         <text class="about-title">小菜记账</text>
-        <text class="about-version">v1.0.0</text>
-        <text class="about-desc">温暖 x 轻松的个人记账小程序</text>
-        <text class="about-desc">让记账从负担变成享受</text>
+        <text class="about-version">v{{ appConfig.app_version || '1.0.0' }}</text>
+        <text class="about-desc">{{ appConfig.app_slogan || '温暖 x 轻松的个人记账小程序' }}</text>
+        <text class="about-desc">{{ appConfig.app_description || '让记账从负担变成享受' }}</text>
         <view class="modal-btns modal-btns-top">
           <view class="modal-btn confirm" @tap="showAbout = false">知道了</view>
         </view>
@@ -143,6 +143,7 @@ import { useUserStore } from '@/stores/user'
 import { useGroupStore } from '@/stores/group'
 import { waitForReady } from '@/utils/app-ready'
 import { getTransactions } from '@/api/transaction'
+import { getConfig } from '@/api/config'
 import { formatAmount } from '@/utils/format'
 import { statusBarHeight } from '@/utils/system'
 import Icon from '@/components/Icon/Icon.vue'
@@ -159,6 +160,7 @@ const loading = ref(true)
 const showAbout = ref(false)
 const showIdentity = ref(false)
 const initialLoaded = ref(false)
+const appConfig = ref<Record<string, string>>({})
 
 onMounted(async () => {
   await waitForReady()
@@ -169,7 +171,8 @@ onMounted(async () => {
       budgetStore.fetchBudget(),
       txStore.fetchTransactions({ page: 1, pageSize: 1 }),
       userStore.fetchUserInfo(),
-      groupStore.fetchGroups()
+      groupStore.fetchGroups(),
+      getConfig().then(config => { appConfig.value = config }).catch(() => {})
     ])
   } catch (e) {
     console.error('Profile load error:', e)
diff --git a/client/src/stores/user.ts b/client/src/stores/user.ts
index cc208cc..0498c3a 100644
--- a/client/src/stores/user.ts
+++ b/client/src/stores/user.ts
@@ -10,6 +10,10 @@ export const useUserStore = defineStore('user', () => {
     return userInfo.value?.nickname || uni.getStorageSync('xc:nickname') || '小菜'
   })
 
+  const slogan = computed(() => {
+    return userInfo.value?.slogan || '记账小能手'
+  })
+
   const avatarUrl = computed(() => {
     const filename = userInfo.value?.avatar_url || uni.getStorageSync('xc:avatar_url') || ''
     if (!filename) return ''
@@ -28,10 +32,17 @@ export const useUserStore = defineStore('user', () => {
     }
   }
 
-  async function updateProfile(nickname: string) {
-    await api.updateNickname(nickname)
-    if (userInfo.value) userInfo.value.nickname = nickname
-    uni.setStorageSync('xc:nickname', nickname)
+  async function updateProfile(data: { nickname?: string; slogan?: string }) {
+    const nickname = data.nickname ?? userInfo.value?.nickname ?? ''
+    const slogan = data.slogan ?? userInfo.value?.slogan ?? ''
+    await api.updateNickname(nickname, slogan)
+    if (userInfo.value) {
+      if (data.nickname !== undefined) userInfo.value.nickname = data.nickname
+      if (data.slogan !== undefined) userInfo.value.slogan = data.slogan
+    }
+    if (data.nickname !== undefined) {
+      uni.setStorageSync('xc:nickname', data.nickname)
+    }
   }
 
   async function uploadAvatar(filePath: string) {
@@ -41,5 +52,5 @@ export const useUserStore = defineStore('user', () => {
     return avatarUrl.value
   }
 
-  return { userInfo, nickname, avatarUrl, fetchUserInfo, updateProfile, uploadAvatar }
+  return { userInfo, nickname, slogan, avatarUrl, fetchUserInfo, updateProfile, uploadAvatar }
 })
diff --git a/server/src/db/init.ts b/server/src/db/init.ts
index a803f75..c7f00ee 100644
--- a/server/src/db/init.ts
+++ b/server/src/db/init.ts
@@ -165,6 +165,56 @@ async function runMigrations(conn: mysql.Connection) {
       ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
     `)
   }
+
+  // users 表添加 slogan（个性签名）
+  const hasSlogan = await columnExists(conn, 'users', 'slogan')
+  if (!hasSlogan) {
+    console.log('[DB] Migrating: adding slogan to users')
+    await conn.query("ALTER TABLE users ADD COLUMN slogan VARCHAR(100) DEFAULT '记账小能手' COMMENT '个性签名' AFTER avatar_url")
+  }
+
+  // 系统配置表
+  const hasSysConfig = await tableExists(conn, 'sys_config')
+  if (!hasSysConfig) {
+    console.log('[DB] Migrating: creating sys_config table')
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS sys_config (
+        config_key VARCHAR(50) PRIMARY KEY COMMENT '配置键',
+        config_value TEXT NOT NULL COMMENT '配置值',
+        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+    // 插入默认配置
+    await conn.query(`
+      INSERT IGNORE INTO sys_config (config_key, config_value) VALUES
+      ('app_version', '1.0.0'),
+      ('app_slogan', '温暖 x 轻松的个人记账小程序'),
+      ('app_description', '让记账从负担变成享受')
+    `)
+  }
+
+  // 反馈表
+  const hasFeedbacks = await tableExists(conn, 'feedbacks')
+  if (!hasFeedbacks) {
+    console.log('[DB] Migrating: creating feedbacks table')
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS feedbacks (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        user_id INT NOT NULL,
+        type ENUM('bug', 'feature', 'ux', 'other') NOT NULL DEFAULT 'other' COMMENT '反馈类型',
+        content TEXT NOT NULL COMMENT '反馈内容',
+        contact VARCHAR(100) DEFAULT '' COMMENT '联系方式',
+        status ENUM('pending', 'processed', 'ignored') DEFAULT 'pending' COMMENT '处理状态',
+        admin_reply TEXT DEFAULT '' COMMENT '管理员回复',
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+        INDEX idx_user (user_id),
+        INDEX idx_status (status),
+        INDEX idx_created (created_at),
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+  }
 }
 
 export async function initDatabase() {
diff --git a/server/src/db/schema.sql b/server/src/db/schema.sql
index c8265d8..0c4a59d 100644
--- a/server/src/db/schema.sql
+++ b/server/src/db/schema.sql
@@ -4,6 +4,7 @@ CREATE TABLE IF NOT EXISTS users (
   session_key VARCHAR(100),
   nickname VARCHAR(50) DEFAULT '小菜' COMMENT '用户昵称',
   avatar_url VARCHAR(500) DEFAULT '' COMMENT '头像URL',
+  slogan VARCHAR(100) DEFAULT '记账小能手' COMMENT '个性签名',
   role ENUM('user', 'admin') DEFAULT 'user' COMMENT '角色',
   created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
@@ -130,3 +131,9 @@ CREATE TABLE IF NOT EXISTS feedbacks (
   INDEX idx_created (created_at),
   FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS sys_config (
+  config_key VARCHAR(50) PRIMARY KEY COMMENT '配置键',
+  config_value TEXT NOT NULL COMMENT '配置值',
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/server/src/db/seed.sql b/server/src/db/seed.sql
index 5e1580f..9071259 100644
--- a/server/src/db/seed.sql
+++ b/server/src/db/seed.sql
@@ -15,3 +15,9 @@ INSERT IGNORE INTO categories (user_id, name, icon, color, type, sort_order) VAL
 (0, '副业', 'TrendingUp', '#7BC67E', 'income', 2),
 (0, '理财', 'PieChart', '#7BC67E', 'income', 3),
 (0, '其他收入', 'Plus', '#BFB3B3', 'income', 4);
+
+-- 系统配置
+INSERT IGNORE INTO sys_config (config_key, config_value) VALUES
+('app_version', '1.0.0'),
+('app_slogan', '温暖 x 轻松的个人记账小程序'),
+('app_description', '让记账从负担变成享受');
diff --git a/server/src/index.ts b/server/src/index.ts
index ffdd491..410d34f 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -19,6 +19,7 @@ import notificationRoutes from './routes/notification'
 import filterRoutes from './routes/filter'
 import adminRoutes from './routes/admin'
 import feedbackRoutes from './routes/feedback'
+import configRoutes from './routes/config'
 import { backupDatabase } from './utils/backup'
 
 // Warn if token secret is using default fallback
@@ -151,6 +152,7 @@ app.use('/api/notifications', apiLimiter, notificationRoutes)
 app.use('/api/filters', apiLimiter, filterRoutes)
 app.use('/api/admin', apiLimiter, adminRoutes)
 app.use('/api/feedback', apiLimiter, feedbackRoutes)
+app.use('/api/config', apiLimiter, configRoutes)
 
 app.get('/api/health', async (_req, res) => {
   try {
diff --git a/server/src/routes/config.ts b/server/src/routes/config.ts
new file mode 100644
index 0000000..21747a1
--- /dev/null
+++ b/server/src/routes/config.ts
@@ -0,0 +1,53 @@
+import { Router } from 'express'
+import { pool } from '../db/connection'
+import { authMiddleware } from '../middleware/auth'
+
+const router = Router()
+
+/** 获取公开配置（无需管理员权限） */
+router.get('/', async (_req, res) => {
+  try {
+    const [rows] = await pool.execute('SELECT config_key, config_value FROM sys_config')
+    const config: Record<string, string> = {}
+    for (const row of rows as any[]) {
+      config[row.config_key] = row.config_value
+    }
+    res.json(config)
+  } catch (error) {
+    console.error('Get config error:', error)
+    res.status(500).json({ error: '获取配置失败' })
+  }
+})
+
+/** 更新配置（管理员权限） */
+router.put('/', authMiddleware, async (req, res) => {
+  try {
+    const userId = (req as any).userId
+    const [users] = await pool.execute('SELECT role FROM users WHERE id = ?', [userId])
+    const user = (users as any[])[0]
+
+    if (!user || user.role !== 'admin') {
+      return res.status(403).json({ error: '无权限' })
+    }
+
+    const data = req.body
+    if (!data || typeof data !== 'object') {
+      return res.status(400).json({ error: '无效的配置数据' })
+    }
+
+    // 批量更新配置
+    for (const [key, value] of Object.entries(data)) {
+      await pool.execute(
+        'INSERT INTO sys_config (config_key, config_value) VALUES (?, ?) ON DUPLICATE KEY UPDATE config_value = ?',
+        [key, value, value]
+      )
+    }
+
+    res.json({ success: true })
+  } catch (error) {
+    console.error('Update config error:', error)
+    res.status(500).json({ error: '更新配置失败' })
+  }
+})
+
+export default router
diff --git a/server/src/routes/user.ts b/server/src/routes/user.ts
index 894f2a0..75dab80 100644
--- a/server/src/routes/user.ts
+++ b/server/src/routes/user.ts
@@ -48,7 +48,7 @@ const upload = multer({
 router.get('/me', async (req: AuthRequest, res: Response) => {
   try {
     const [rows] = await pool.query(
-      'SELECT id, nickname, avatar_url, role, created_at FROM users WHERE id = ?',
+      'SELECT id, nickname, avatar_url, slogan, role, created_at FROM users WHERE id = ?',
       [req.userId]
     )
     const user = (rows as any[])[0]
@@ -62,10 +62,10 @@ router.get('/me', async (req: AuthRequest, res: Response) => {
   }
 })
 
-/** 更新用户昵称 */
+/** 更新用户昵称/签名 */
 router.put('/me', async (req: AuthRequest, res: Response) => {
   try {
-    const { nickname } = req.body
+    const { nickname, slogan } = req.body
 
     if (nickname !== undefined) {
       if (typeof nickname !== 'string' || nickname.trim().length === 0) {
@@ -76,6 +76,15 @@ router.put('/me', async (req: AuthRequest, res: Response) => {
       }
     }
 
+    if (slogan !== undefined) {
+      if (typeof slogan !== 'string') {
+        return res.status(400).json({ code: 40001, message: '签名格式错误' })
+      }
+      if (slogan.length > 100) {
+        return res.status(400).json({ code: 40001, message: '签名不能超过100个字符' })
+      }
+    }
+
     const updates: string[] = []
     const params: any[] = []
 
@@ -84,6 +93,11 @@ router.put('/me', async (req: AuthRequest, res: Response) => {
       params.push(nickname.trim())
     }
 
+    if (slogan !== undefined) {
+      updates.push('slogan = ?')
+      params.push(slogan.trim())
+    }
+
     if (updates.length === 0) {
       return res.status(400).json({ code: 40001, message: '没有需要更新的字段' })
     }