diff --git a/app.js b/app.js
index 2b9b6ac..dc71f5f 100644
--- a/app.js
+++ b/app.js
@@ -9,34 +9,72 @@ App({
       })
     }
 
-    // 自动静默登录：调用云函数获取 openid
+
+
+    // 自动静默登录：wx.login 获取 code，再请求后端接口换取 openid
     this.silentLogin()
   },
 
   silentLogin() {
-    wx.cloud.callFunction({
-      name: 'login',
-      data: {},
-      success: (res) => {
-        const openid = res.result.openid
-        const userInfo = res.result.userInfo || {}
-        userInfo.openid = openid
-
-        this.globalData.userInfo = userInfo
-        this.globalData.isLoggedIn = true
-        wx.setStorageSync('userInfo', userInfo)
-
-        // 通知当前页面刷新
-        if (this.loginReadyCallback) {
-          this.loginReadyCallback(userInfo)
+    wx.login({
+      success: (loginRes) => {
+        if (loginRes.code) {
+          this.loginWithCode(loginRes.code)
+        } else {
+          console.error('wx.login 失败', loginRes.errMsg)
+          this.globalData.isLoggedIn = false
+          this.globalData.loginFailed = true
+          if (this.loginReadyCallback) {
+            this.loginReadyCallback(null)
+          }
         }
       },
       fail: (err) => {
-        console.error('静默登录失败', err)
+        console.error('wx.login 调用失败', err)
         this.globalData.isLoggedIn = false
         this.globalData.loginFailed = true
+        if (this.loginReadyCallback) {
+          this.loginReadyCallback(null)
+        }
+      }
+    })
+  },
 
-        // 通知页面登录失败
+  loginWithCode(code) {
+    wx.request({
+      url: 'https://xcx.yun.588580.xyz/api/wx-mini/login',
+      method: 'GET',
+      data: { code },
+      success: (res) => {
+        const result = res.data
+        if (result && result.code === 0 && result.data) {
+          const openid = result.data.openid
+          const userInfo = {
+            openid,
+            sessionKey: result.data.session_key,
+            unionid: result.data.unionid || ''
+          }
+
+          this.globalData.userInfo = userInfo
+          this.globalData.isLoggedIn = true
+          wx.setStorageSync('userInfo', userInfo)
+
+          if (this.loginReadyCallback) {
+            this.loginReadyCallback(userInfo)
+          }
+        } else {
+          console.error('后端登录失败', result)
+          this.globalData.isLoggedIn = false
+          this.globalData.loginFailed = true
+          if (this.loginReadyCallback) {
+            this.loginReadyCallback(null)
+          }
+        }
+      },
+      fail: (err) => {
+        console.error('请求后端登录接口失败', err)
+        this.globalData.isLoggedIn = false
+        this.globalData.loginFailed = true
         if (this.loginReadyCallback) {
           this.loginReadyCallback(null)
         }
diff --git a/utils/cloud.js b/utils/cloud.js
index c9ca208..1e4c040 100644
--- a/utils/cloud.js
+++ b/utils/cloud.js
@@ -17,11 +17,17 @@ function getCmd() {
  * @returns {object} 格式化后的记录
  */
 function formatRecord(record) {
+  if (!record) return record
   const date = record.createTime
   let createTimeStr = ''
   if (date) {
-    if (typeof date === 'object' && date.$date) {
+    if (typeof date === 'string') {
+      // 后端API返回的时间字符串，直接格式化
+      createTimeStr = new Date(date).toLocaleString('zh-CN')
+    } else if (typeof date === 'object' && date.$date) {
       createTimeStr = new Date(date.$date).toLocaleString('zh-CN')
+    } else if (typeof date === 'number') {
+      createTimeStr = new Date(date).toLocaleString('zh-CN')
     } else {
       createTimeStr = new Date(date).toLocaleString('zh-CN')
     }
@@ -114,18 +120,46 @@ const appointmentDB = {
   },
 
   /**
-   * 获取当前用户最新一条预约
+   * 将后端API返回的预约记录映射为前端模板兼容的字段
+   * 后端字段: id, visitDate, visitTime, createTime, ...
+   * 前端字段: _id, date, time, createTime(格式化后), ...
+   */
+  _mapApiRecord(record) {
+    if (!record) return null
+    return {
+      ...record,
+      _id: record.id,
+      date: record.visitDate,
+      time: record.visitTime
+    }
+  },
+
+  /**
+   * 获取当前用户最新一条预约（通过后端API）
    * @param {string} openid
    * @returns {Promise<object|null>}
    */
-  async getLatest(openid) {
-    const db = getDb()
-    const res = await db.collection('appointments')
-      .where({ _openid: openid })
-      .orderBy('createTime', 'desc')
-      .limit(1)
-      .get()
-    return res.data.length > 0 ? res.data[0] : null
+  getLatest(openid) {
+    return new Promise((resolve, reject) => {
+      wx.request({
+        url: 'https://xcx.yun.588580.xyz/api/wx-mini/appointment/latest',
+        method: 'GET',
+        data: { openid },
+        success: (res) => {
+          const result = res.data
+          if (result && result.code === 0) {
+            resolve(this._mapApiRecord(result.data) || null)
+          } else {
+            console.error('获取最新预约失败', result)
+            reject(new Error(result ? result.message : '请求失败'))
+          }
+        },
+        fail: (err) => {
+          console.error('请求后端获取最新预约失败', err)
+          reject(err)
+        }
+      })
+    })
   },
 
   /**