diff --git a/api/appUser.js b/api/appUser.js
index 60964b3..3b60b11 100644
--- a/api/appUser.js
+++ b/api/appUser.js
@@ -222,6 +222,19 @@ export function getUserInvites(user_id, page = 1, page_size = 20) {
 // 兼容性适配接口 (适配 pages/mine/index.vue)
 // ============================================
 
+// ============================================
+// 用户信息修改 API
+// ============================================
+
+/**
+ * 修改用户信息
+ * @param {number} user_id - 用户ID
+ * @param {object} data - 用户数据 { nickname, avatar(base64) }
+ */
+export function modifyUser(user_id, data) {
+  return authRequest({ url: `/api/app/users/${user_id}`, method: 'PUT', data })
+}
+
 export function getUserInfo() {
   const user_info = uni.getStorageSync('user_info')
   if (user_info) return Promise.resolve(user_info)
diff --git a/pages/login/index.vue b/pages/login/index.vue
index 12d5e6f..9d27542 100644
--- a/pages/login/index.vue
+++ b/pages/login/index.vue
@@ -654,11 +654,6 @@ function fetchExtraData(userId) {
       box-shadow: 0 12rpx 32rpx rgba(7, 193, 96, 0.3);
     }
 
-    &.toutiao-icon {
-      background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
-      box-shadow: 0 12rpx 32rpx rgba(0, 0, 0, 0.3);
-    }
-
     .icon-emoji {
       font-size: 56rpx;
     }
@@ -678,6 +673,53 @@ function fetchExtraData(userId) {
   }
 }
 
+/* 抖音登录面板 */
+.toutiao-panel {
+  align-items: center;
+  justify-content: center;
+  padding-top: 48rpx;
+
+  .panel-icon-wrap {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    margin-bottom: 40rpx;
+  }
+
+  .panel-icon {
+    width: 120rpx;
+    height: 120rpx;
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+
+    &.toutiao-icon {
+      background: linear-gradient(135deg, #000000 0%, #1a1a1a 100%);
+      box-shadow: 0 12rpx 32rpx rgba(0, 0, 0, 0.3);
+    }
+
+    .icon-emoji {
+      font-size: 56rpx;
+    }
+  }
+
+  .panel-title {
+    font-size: 36rpx;
+    font-weight: 700;
+    color: $text-main;
+    margin-bottom: 12rpx;
+    text-align: center;
+  }
+
+  .panel-desc {
+    font-size: 26rpx;
+    color: $text-sub;
+    margin-bottom: 48rpx;
+    text-align: center;
+  }
+}
+
 /* 短信登录面板 */
 .sms-panel {
   .panel-title {
diff --git a/pages/mine/index.vue b/pages/mine/index.vue
index 0f45906..678a86e 100644
--- a/pages/mine/index.vue
+++ b/pages/mine/index.vue
@@ -7,9 +7,23 @@
     <view class="header-section">
       <view class="user-info-card glass-card">
         <view class="user-main">
-          <image class="avatar" :src="avatar || '/static/logo.png'" mode="aspectFill"></image>
+          <view class="avatar-wrapper" @click="handleEditAvatar" v-if="nickname">
+            <image class="avatar" :src="avatar || '/static/logo.png'" mode="aspectFill"></image>
+            <view class="avatar-edit-badge">
+              <text class="edit-icon">📷</text>
+            </view>
+          </view>
+          <image v-else class="avatar" :src="avatar || '/static/logo.png'" mode="aspectFill"></image>
           <view class="user-meta">
-            <view class="name-row">
+            <view class="name-row" @click="handleEditNickname" v-if="nickname">
+              <text class="nickname">{{ nickname || '未登录' }}</text>
+              <text class="edit-nickname-icon">✏️</text>
+              <view class="level-badge" v-if="title">
+                <image class="level-icon" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNCIgaGVpZ2h0PSIyNCIgdmlld0JveD0iMCAwIDI0IDI0IiBmaWxsPSJub25lIiBzdHJva2U9IiNGRjZCMDAiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNNiAzSDE4TDIxIDlMOSAyMSAzIDlMNiAzWiIgLz48L3N2Zz4=" mode="aspectFit"></image>
+                <text class="level-text">Lv1 {{ title }}</text>
+              </view>
+            </view>
+            <view class="name-row" v-else>
               <text class="nickname">{{ nickname || '未登录' }}</text>
               <view class="level-badge" v-if="title">
                 <image class="level-icon" src="data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIyNCIgaGVpZ2h0PSIyNCIgdmlld0JveD0iMCAwIDI0IDI0IiBmaWxsPSJub25lIiBzdHJva2U9IiNGRjZCMDAiIHN0cm9rZS13aWR0aD0iMiIgc3Ryb2tlLWxpbmVjYXA9InJvdW5kIiBzdHJva2UtbGluZWpvaW49InJvdW5kIj48cGF0aCBkPSJNNiAzSDE4TDIxIDlMOSAyMSAzIDlMNiAzWiIgLz48L3N2Zz4=" mode="aspectFit"></image>
@@ -454,7 +468,7 @@
 <script>
 import {
   getUserInfo, getUserStats, getPointsBalance, getUserPoints, getUserCoupons, getItemCards,
-  getUserTasks, getTaskProgress, getInviteRecords
+  getUserTasks, getTaskProgress, getInviteRecords, modifyUser
 } from '../../api/appUser.js'
 
 export default {
@@ -540,6 +554,124 @@ export default {
     }
   },
   methods: {
+    // 修改头像
+    handleEditAvatar() {
+      if (!this.userId) {
+        uni.showToast({ title: '请先登录', icon: 'none' })
+        return
+      }
+
+      uni.chooseImage({
+        count: 1,
+        sizeType: ['compressed'], // 选择压缩图
+        sourceType: ['album', 'camera'],
+        success: (res) => {
+          const tempFilePath = res.tempFilePaths[0]
+          this.uploadAvatar(tempFilePath)
+        }
+      })
+    },
+
+    // 上传头像并转换为 base64
+    async uploadAvatar(filePath) {
+      uni.showLoading({ title: '上传中...' })
+
+      try {
+        // 将图片转换为 base64
+        const base64 = await this.fileToBase64(filePath)
+
+        // 调用修改用户信息接口
+        const data = await modifyUser(this.userId, { avatar: base64 })
+
+        // 更新本地存储
+        uni.setStorageSync('avatar', data.avatar || base64)
+        this.avatar = data.avatar || base64
+
+        const userInfo = uni.getStorageSync('user_info') || {}
+        userInfo.avatar = data.avatar || base64
+        uni.setStorageSync('user_info', userInfo)
+
+        uni.hideLoading()
+        uni.showToast({ title: '头像修改成功', icon: 'success' })
+      } catch (err) {
+        uni.hideLoading()
+        uni.showToast({ title: err.message || '上传失败', icon: 'none' })
+      }
+    },
+
+    // 文件转 base64
+    fileToBase64(filePath) {
+      return new Promise((resolve, reject) => {
+        uni.getFileSystemManager().readFile({
+          filePath: filePath,
+          encoding: 'base64',
+          success: (res) => {
+            // 判断文件类型并添加 data URI 前缀
+            const ext = filePath.split('.').pop().toLowerCase()
+            let mimeType = 'image/jpeg'
+            if (ext === 'png') mimeType = 'image/png'
+            if (ext === 'gif') mimeType = 'image/gif'
+            if (ext === 'webp') mimeType = 'image/webp'
+
+            resolve(`data:${mimeType};base64,${res.data}`)
+          },
+          fail: (err) => {
+            reject(err)
+          }
+        })
+      })
+    },
+
+    // 修改昵称
+    handleEditNickname() {
+      if (!this.userId) {
+        uni.showToast({ title: '请先登录', icon: 'none' })
+        return
+      }
+
+      uni.showModal({
+        title: '修改昵称',
+        editable: true,
+        placeholderText: '请输入新昵称',
+        content: this.nickname,
+        success: async (res) => {
+          if (res.confirm) {
+            const newNickname = res.content?.trim()
+            if (!newNickname) {
+              uni.showToast({ title: '昵称不能为空', icon: 'none' })
+              return
+            }
+
+            if (newNickname.length > 20) {
+              uni.showToast({ title: '昵称不能超过20个字符', icon: 'none' })
+              return
+            }
+
+            try {
+              uni.showLoading({ title: '修改中...' })
+
+              // 调用修改用户信息接口
+              const data = await modifyUser(this.userId, { nickname: newNickname })
+
+              // 更新本地存储
+              uni.setStorageSync('nickname', data.nickname || newNickname)
+              this.nickname = data.nickname || newNickname
+
+              const userInfo = uni.getStorageSync('user_info') || {}
+              userInfo.nickname = data.nickname || newNickname
+              uni.setStorageSync('user_info', userInfo)
+
+              uni.hideLoading()
+              uni.showToast({ title: '昵称修改成功', icon: 'success' })
+            } catch (err) {
+              uni.hideLoading()
+              uni.showToast({ title: err.message || '修改失败', icon: 'none' })
+            }
+          }
+        }
+      })
+    },
+
     getInviteCode() {
       const v = this.inviteCode || uni.getStorageSync('invite_code') || (uni.getStorageSync('user_info') || {}).invite_code || ''
       return String(v || '').trim()
@@ -1186,16 +1318,57 @@ export default {
   margin-right: 24rpx;
 }
 
+.avatar-wrapper {
+  position: relative;
+  margin-right: 24rpx;
+  cursor: pointer;
+
+  .avatar {
+    margin-right: 0;
+  }
+
+  .avatar-edit-badge {
+    position: absolute;
+    bottom: 0;
+    right: 0;
+    width: 40rpx;
+    height: 40rpx;
+    background: linear-gradient(135deg, $brand-primary, $brand-secondary);
+    border-radius: 50%;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border: 3rpx solid $bg-card;
+    box-shadow: 0 2rpx 8rpx rgba(0, 0, 0, 0.15);
+
+    .edit-icon {
+      font-size: 20rpx;
+      line-height: 1;
+    }
+  }
+}
+
 .user-meta { flex: 1; }
 
 .name-row {
   display: flex; align-items: center; margin-bottom: 12rpx;
+  cursor: pointer;
+
+  &:active {
+    opacity: 0.7;
+  }
 }
 .nickname {
   font-size: $font-xl; font-weight: 900; color: $text-main;
   margin-right: 16rpx;
 }
 
+.edit-nickname-icon {
+  font-size: 28rpx;
+  margin-right: 8rpx;
+  opacity: 0.6;
+}
+
 .level-badge {
   background: linear-gradient(90deg, #333, #555);
   color: $accent-gold;