diff --git a/banban-mini/config/dev.js b/banban-mini/config/dev.js
index 7dcc8a3..747dcc5 100644
--- a/banban-mini/config/dev.js
+++ b/banban-mini/config/dev.js
@@ -5,7 +5,7 @@ module.exports = {
   defineConstants: {
     __APP_ENV__: '"development"',
     // Update this to your LAN backend when testing on a real device.
-    __API_BASE_URL__: '"http://192.168.101.86:8001"',
+    __API_BASE_URL__: '"https://banban.api.talkingq.com"',
   },
   mini: {},
   h5: {}
diff --git a/banban-mini/config/prod.js b/banban-mini/config/prod.js
index a0664a7..8a8c429 100644
--- a/banban-mini/config/prod.js
+++ b/banban-mini/config/prod.js
@@ -5,7 +5,7 @@ module.exports = {
   defineConstants: {
     __APP_ENV__: '"production"',
     // Replace with the production backend before release builds.
-    __API_BASE_URL__: '"http://192.168.101.86:8001"',
+    __API_BASE_URL__: '"https://banban.api.talkingq.com"',
   },
   mini: {},
   h5: {}
diff --git a/banban-mini/src/config/env.ts b/banban-mini/src/config/env.ts
index 514bce5..78b32df 100644
--- a/banban-mini/src/config/env.ts
+++ b/banban-mini/src/config/env.ts
@@ -8,7 +8,7 @@ export interface AppConfig {
 
 export const APP_CONFIG: AppConfig = {
   appEnv: typeof __APP_ENV__ === 'undefined' ? 'development' : __APP_ENV__,
-  apiBaseUrl: typeof __API_BASE_URL__ === 'undefined' ? 'http://127.0.0.1:8001' : __API_BASE_URL__,
+  apiBaseUrl: typeof __API_BASE_URL__ === 'undefined' ? 'https://banban.api.talkingq.com' : __API_BASE_URL__,
 }
 
 export const API_BASE_URL = APP_CONFIG.apiBaseUrl
diff --git a/banban-mini/src/pages/bind/index.scss b/banban-mini/src/pages/bind/index.scss
index 007b012..d9cb7c9 100644
--- a/banban-mini/src/pages/bind/index.scss
+++ b/banban-mini/src/pages/bind/index.scss
@@ -218,6 +218,13 @@
   color: #D46B08;
 }
 
+.pending-tip-subtext {
+  display: block;
+  margin-top: 8px;
+  font-size: 24px;
+  color: #8C5400;
+}
+
 .child-list {
   display: flex;
   flex-wrap: wrap;
diff --git a/banban-mini/src/pages/bind/index.tsx b/banban-mini/src/pages/bind/index.tsx
index aaf8d6f..8abeb44 100644
--- a/banban-mini/src/pages/bind/index.tsx
+++ b/banban-mini/src/pages/bind/index.tsx
@@ -1,11 +1,31 @@
 import { View, Text, Image, Input, Button } from '@tarojs/components'
-import { useState } from 'react'
-import Taro, { useDidShow } from '@tarojs/taro'
+import { useEffect, useRef, useState } from 'react'
+import Taro, { useDidShow, useDidHide } from '@tarojs/taro'
+
 import { getToken } from '@/services/auth'
-import { directBind, resolveActiveBinding, setBindingChild, setSelectedBindingDeviceId } from '@/services/binding'
-import { Child, createChild, getChildren } from '@/services/child'
+import {
+  getNFCBindSession,
+  resolveActiveBinding,
+  setBindingChild,
+  setSelectedBindingDeviceId,
+  startNFCBind,
+} from '@/services/binding'
+import {
+  Child,
+  createChild,
+  getChildren,
+  resolveChildSelection,
+  setSelectedChildId as setStoredSelectedChildId,
+} from '@/services/child'
+
 import './index.scss'
 
+const SESSION_STATUS_PENDING = 1
+const SESSION_STATUS_COMPLETED = 2
+const SESSION_STATUS_EXPIRED = 3
+const SESSION_STATUS_FAILED = 4
+const SESSION_STATUS_CANCELLED = 5
+
 function parseBindingPayload(rawValue: string): { deviceId: string; serialNumber: string } {
   const raw = String(rawValue || '').trim()
   if (!raw) return { deviceId: '', serialNumber: '' }
@@ -71,15 +91,99 @@ export default function Bind() {
   const [selectedChildId, setSelectedChildId] = useState<number | null>(null)
   const [newChildName, setNewChildName] = useState('')
   const [pendingDeviceId, setPendingDeviceId] = useState<string | null>(null)
+  const [bindToken, setBindToken] = useState('')
+  const [bindStatus, setBindStatus] = useState<number | null>(null)
+  const [cardUUID, setCardUUID] = useState('')
+  const [bindHint, setBindHint] = useState('')
+  const pollingRef = useRef<ReturnType<typeof setTimeout> | null>(null)
 
   useDidShow(() => {
     void loadPageData()
   })
 
+  useDidHide(() => {
+    stopPolling()
+  })
+
+  useEffect(() => () => stopPolling(), [])
+
+  const hasSelectedOrNewChild = selectedChildId !== null || Boolean(newChildName.trim())
+  const isPendingBinding = Boolean(pendingDeviceId)
+  const isPollingBind = bindStatus === SESSION_STATUS_PENDING && Boolean(bindToken)
+  const canEditDeviceFields = hasSelectedOrNewChild && !isPollingBind
+
   const goDevicePage = () => {
     Taro.reLaunch({ url: '/pages/device/index' })
   }
 
+  const stopPolling = () => {
+    if (pollingRef.current) {
+      clearTimeout(pollingRef.current)
+      pollingRef.current = null
+    }
+  }
+
+  const schedulePoll = () => {
+    stopPolling()
+    pollingRef.current = setTimeout(() => {
+      void pollBindSession()
+    }, 1500)
+  }
+
+  const resetBindSessionState = () => {
+    stopPolling()
+    setBindToken('')
+    setBindStatus(null)
+    setCardUUID('')
+    setBindHint('')
+  }
+
+  const pollBindSession = async () => {
+    if (!bindToken) return
+
+    try {
+      const session = await getNFCBindSession(bindToken)
+      setBindStatus(session.status)
+      setCardUUID(session.card_uuid || '')
+
+      if (session.status === SESSION_STATUS_PENDING) {
+        setBindHint('已发送绑卡指令，请拿自己的卡去设备上贴一下')
+        schedulePoll()
+        return
+      }
+
+      stopPolling()
+
+      if (session.status === SESSION_STATUS_COMPLETED) {
+        setSelectedBindingDeviceId(session.device_id)
+        setBindHint(session.card_uuid ? `绑定完成，卡号 ${session.card_uuid}` : '绑定完成')
+        Taro.showToast({ title: '设备绑定成功', icon: 'success' })
+        setTimeout(() => {
+          goDevicePage()
+        }, 500)
+        return
+      }
+
+      if (session.status === SESSION_STATUS_EXPIRED) {
+        setBindHint('绑定会话已过期，请重新扫码并贴卡')
+        return
+      }
+
+      if (session.status === SESSION_STATUS_FAILED) {
+        setBindHint('贴卡绑定失败，请重试')
+        return
+      }
+
+      if (session.status === SESSION_STATUS_CANCELLED) {
+        setBindHint('当前绑定已被新的绑定流程替代，请重新扫码')
+        return
+      }
+    } catch (error: any) {
+      console.error('[bind] poll bind session failed:', error)
+      setBindHint(error?.message || '查询绑定状态失败，请重试')
+    }
+  }
+
   const loadPageData = async () => {
     if (!getToken()) {
       Taro.reLaunch({ url: '/pages/login/index' })
@@ -90,17 +194,15 @@ export default function Bind() {
     try {
       const [childResponse, activeBinding] = await Promise.all([getChildren(), resolveActiveBinding()])
       const currentChildren = childResponse.items || []
-
+      const currentChild = resolveChildSelection(currentChildren)
       setChildren(currentChildren)
-      setSelectedChildId((currentSelectedChildId) => currentSelectedChildId || currentChildren[0]?.child_id || null)
+      setSelectedChildId(currentChild?.child_id || null)
 
       if (activeBinding?.device_id && !activeBinding.child_id) {
         setPendingDeviceId(activeBinding.device_id)
         setDeviceId(activeBinding.device_id)
       } else {
         setPendingDeviceId(null)
-        setDeviceId('')
-        setSerialNumber('')
       }
     } catch (error: any) {
       console.error('[bind] load failed:', error)
@@ -122,13 +224,21 @@ export default function Bind() {
     const child = await createChild({ child_name: childName })
     setChildren((currentChildren) => [child, ...currentChildren])
     setSelectedChildId(child.child_id)
+    setStoredSelectedChildId(child.child_id)
     setNewChildName('')
     return child.child_id
   }
 
   const handleScanCode = () => {
-    setIsScanning(true)
+    if (!canEditDeviceFields) {
+      Taro.showToast({
+        title: '请先选择或新建儿童资料',
+        icon: 'none',
+      })
+      return
+    }
 
+    setIsScanning(true)
     Taro.scanCode({
       onlyFromCamera: true,
       scanType: ['qrCode', 'barCode'],
@@ -145,11 +255,7 @@ export default function Bind() {
       },
       fail: (err) => {
         setIsScanning(false)
-
-        if (err.errMsg && err.errMsg.includes('cancel')) {
-          return
-        }
-
+        if (err.errMsg && err.errMsg.includes('cancel')) return
         Taro.showToast({
           title: '扫码失败，请重试',
           icon: 'none',
@@ -159,22 +265,21 @@ export default function Bind() {
   }
 
   const handleSubmit = async () => {
-    if (submitting) return
+    if (submitting || isPollingBind) return
 
     setSubmitting(true)
-    Taro.showLoading({ title: pendingDeviceId ? '关联中...' : '绑定中...' })
+    Taro.showLoading({ title: isPendingBinding ? '关联中...' : '发送绑卡指令...' })
 
     try {
       const childId = await ensureChildId()
+      if (!childId) {
+        throw new Error('请先选择儿童或填写新的儿童昵称')
+      }
 
-      if (pendingDeviceId) {
-        if (!childId) {
-          throw new Error('请选择儿童或填写新儿童昵称')
-        }
-
-        await setBindingChild(pendingDeviceId, { child_id: childId })
+      if (isPendingBinding) {
+        await setBindingChild(pendingDeviceId!, { child_id: childId })
         setSelectedBindingDeviceId(pendingDeviceId)
-        Taro.showToast({ title: '绑定完成', icon: 'success' })
+        Taro.showToast({ title: '关联完成', icon: 'success' })
         setTimeout(() => {
           goDevicePage()
         }, 300)
@@ -188,30 +293,21 @@ export default function Bind() {
         throw new Error('请输入设备序列号')
       }
 
-      const result = await directBind({
+      resetBindSessionState()
+      const session = await startNFCBind({
         device_id: deviceId.trim(),
         serial_number: serialNumber.trim(),
-        ...(childId ? { child_id: childId } : {}),
+        child_id: childId,
       })
 
-      setSelectedBindingDeviceId(result.device_id)
-
-      if (childId || result.child_id) {
-        Taro.showToast({ title: '设备绑定成功', icon: 'success' })
-        setTimeout(() => {
-          goDevicePage()
-        }, 300)
-        return
-      }
-
-      setPendingDeviceId(result.device_id)
-      setDeviceId(result.device_id)
-      Taro.showToast({
-        title: '设备已绑定，请继续关联儿童',
-        icon: 'none',
-      })
+      setBindToken(session.bind_token)
+      setBindStatus(session.status)
+      setBindHint('已发送绑卡指令，请去设备上贴自己的卡')
+      schedulePoll()
+      Taro.showToast({ title: '请去设备上贴卡', icon: 'none' })
     } catch (error: any) {
       console.error('[bind] submit failed:', error)
+      setBindHint(error?.message || '绑定失败，请重试')
       Taro.showToast({
         title: error?.message || '绑定失败，请重试',
         icon: 'none',
@@ -235,23 +331,25 @@ export default function Bind() {
   return (
     <View className='bind-page'>
       <View className='bind-header'>
-        <Text className='title'>{pendingDeviceId ? '补全绑定' : '绑定设备'}</Text>
+        <Text className='title'>{isPendingBinding ? '补全绑定' : '扫码贴卡绑定设备'}</Text>
         <Text className='subtitle'>
-          {pendingDeviceId ? '设备已绑到当前账号，请补充儿童资料完成配置' : '扫描二维码或手动填写设备号和序列号'}
+          {isPendingBinding
+            ? '当前设备已存在待补全关系，请先补充儿童资料'
+            : '先选择儿童，再扫码设备，系统会下发绑卡指令，随后去设备上贴卡确认'}
         </Text>
       </View>
 
       <View className='scan-area'>
         <View className='scan-frame' onClick={handleScanCode}>
           <View className='icon-bg orange'>
-            <Image
-              className='control-icon-img'
-              src={require('../../assets/tab-icons/rings.png')}
-              mode='aspectFit'
-            />
+            <Image className='control-icon-img' src={require('../../assets/tab-icons/rings.png')} mode='aspectFit' />
           </View>
-          <Text className='scan-text'>{isScanning ? '正在扫码...' : '点击扫码'}</Text>
-          <Text className='scan-hint'>请将二维码放入框内</Text>
+          <Text className='scan-text'>
+            {!canEditDeviceFields ? '请先完成儿童资料' : isScanning ? '正在扫码...' : '点击扫码'}
+          </Text>
+          <Text className='scan-hint'>
+            {!canEditDeviceFields ? '先选儿童，再扫设备二维码' : '扫描设备二维码或条码'}
+          </Text>
         </View>
 
         <View className='scan-corners'>
@@ -264,39 +362,7 @@ export default function Bind() {
 
       <View className='bind-form'>
         <View className='form-card'>
-          <Text className='form-title'>设备信息</Text>
-
-          <View className='field-item'>
-            <Text className='field-label'>设备号</Text>
-            <Input
-              className='field-input'
-              value={deviceId}
-              disabled={!!pendingDeviceId}
-              placeholder='请输入设备号'
-              onInput={(event) => setDeviceId(event.detail.value)}
-            />
-          </View>
-
-          <View className='field-item'>
-            <Text className='field-label'>设备序列号</Text>
-            <Input
-              className='field-input'
-              value={serialNumber}
-              disabled={!!pendingDeviceId}
-              placeholder='请输入设备序列号'
-              onInput={(event) => setSerialNumber(event.detail.value)}
-            />
-          </View>
-
-          {pendingDeviceId && (
-            <View className='pending-tip'>
-              <Text className='pending-tip-text'>当前待完成设备：{pendingDeviceId}</Text>
-            </View>
-          )}
-        </View>
-
-        <View className='form-card'>
-          <Text className='form-title'>儿童信息</Text>
+          <Text className='form-title'>儿童资料</Text>
 
           {children.length > 0 && (
             <View className='child-list'>
@@ -305,7 +371,11 @@ export default function Bind() {
                   key={child.child_id}
                   className={`child-item ${selectedChildId === child.child_id ? 'selected' : ''}`}
                   onClick={() => {
-                    setSelectedChildId((currentChildId) => (currentChildId === child.child_id ? null : child.child_id))
+                    setSelectedChildId((currentChildId) => {
+                      const nextChildId = currentChildId === child.child_id ? null : child.child_id
+                      setStoredSelectedChildId(nextChildId)
+                      return nextChildId
+                    })
                     setNewChildName('')
                   }}
                 >
@@ -325,16 +395,65 @@ export default function Bind() {
                 setNewChildName(event.detail.value)
                 if (event.detail.value) {
                   setSelectedChildId(null)
+                  setStoredSelectedChildId(null)
                 }
               }}
             />
           </View>
 
-          <Text className='field-hint'>优先选择已有儿童，也可以直接输入一个新昵称。</Text>
+          <Text className='field-hint'>
+            {children.length > 0
+              ? '可以选已有儿童，也可以在这里新建一个儿童后再绑定设备'
+              : '当前还没有儿童资料，请先创建一个儿童资料'}
+          </Text>
         </View>
 
-        <Button className='submit-btn' loading={submitting} disabled={submitting} onClick={handleSubmit}>
-          {pendingDeviceId ? '完成儿童关联' : '绑定设备'}
+        <View className='form-card'>
+          <Text className='form-title'>设备信息</Text>
+
+          <View className='field-item'>
+            <Text className='field-label'>设备号</Text>
+            <Input
+              className='field-input'
+              value={deviceId}
+              disabled={!canEditDeviceFields || isPendingBinding}
+              placeholder={canEditDeviceFields ? '请输入设备号' : '请先选择儿童资料'}
+              onInput={(event) => setDeviceId(event.detail.value)}
+            />
+          </View>
+
+          <View className='field-item'>
+            <Text className='field-label'>设备序列号</Text>
+            <Input
+              className='field-input'
+              value={serialNumber}
+              disabled={!canEditDeviceFields || isPendingBinding}
+              placeholder={canEditDeviceFields ? '请输入设备序列号' : '请先选择儿童资料'}
+              onInput={(event) => setSerialNumber(event.detail.value)}
+            />
+          </View>
+
+          {bindHint ? (
+            <View className='pending-tip'>
+              <Text className='pending-tip-text'>{bindHint}</Text>
+              {cardUUID ? <Text className='pending-tip-subtext'>卡片 UUID：{cardUUID}</Text> : null}
+            </View>
+          ) : null}
+
+          {isPendingBinding && (
+            <View className='pending-tip'>
+              <Text className='pending-tip-text'>当前待补全设备：{pendingDeviceId}</Text>
+            </View>
+          )}
+        </View>
+
+        <Button
+          className='submit-btn'
+          loading={submitting}
+          disabled={submitting || !hasSelectedOrNewChild || isPollingBind}
+          onClick={handleSubmit}
+        >
+          {isPendingBinding ? '完成儿童关联' : isPollingBind ? '等待贴卡确认' : '发送绑卡指令'}
         </Button>
       </View>
 
@@ -342,15 +461,15 @@ export default function Bind() {
         <Text className='tips-title'>绑定帮助</Text>
         <View className='tip-item'>
           <Text className='tip-number'>1</Text>
-          <Text className='tip-text'>先扫描二维码，自动填入设备号和序列号。</Text>
+          <Text className='tip-text'>先选择已有儿童，或者在本页新建一个儿童</Text>
         </View>
         <View className='tip-item'>
           <Text className='tip-number'>2</Text>
-          <Text className='tip-text'>如果二维码里只有设备号，请手动补充序列号。</Text>
+          <Text className='tip-text'>扫描设备二维码，确认设备号和序列号正确</Text>
         </View>
         <View className='tip-item'>
           <Text className='tip-number'>3</Text>
-          <Text className='tip-text'>没有儿童资料时，可以直接在本页新建并完成绑定。</Text>
+          <Text className='tip-text'>点击发送绑卡指令，然后去设备上贴自己的卡完成确认</Text>
         </View>
       </View>
     </View>
diff --git a/banban-mini/src/pages/chat/detail/index.scss b/banban-mini/src/pages/chat/detail/index.scss
index d10d348..ad04f3d 100644
--- a/banban-mini/src/pages/chat/detail/index.scss
+++ b/banban-mini/src/pages/chat/detail/index.scss
@@ -174,6 +174,33 @@
   }
 }
 
+.audio-bubble {
+  min-width: 220px;
+  display: flex;
+  align-items: center;
+  gap: 14px;
+
+  &.playing {
+    opacity: 0.82;
+  }
+}
+
+.audio-bubble-icon {
+  font-size: 24px;
+  font-weight: 700;
+  line-height: 1;
+}
+
+.audio-bubble-text {
+  flex: 1;
+  font-size: 28px;
+}
+
+.audio-bubble-duration {
+  font-size: 24px;
+  opacity: 0.8;
+}
+
 .empty-chat {
   min-height: 320px;
   display: flex;
diff --git a/banban-mini/src/pages/chat/detail/index.tsx b/banban-mini/src/pages/chat/detail/index.tsx
index 9e8d4f5..aa9d399 100644
--- a/banban-mini/src/pages/chat/detail/index.tsx
+++ b/banban-mini/src/pages/chat/detail/index.tsx
@@ -1,5 +1,5 @@
 import { View, Text, ScrollView, Image, Input } from '@tarojs/components'
-import { useEffect, useState } from 'react'
+import { useEffect, useRef, useState } from 'react'
 import Taro, { useRouter } from '@tarojs/taro'
 import {
   getMessages,
@@ -47,6 +47,11 @@ function formatParticipantLabel(message: ChatMessage): string {
   return `${senderType} ${senderId}`
 }
 
+function formatAudioDuration(durationMs?: number | null): string {
+  const totalSeconds = Math.max(1, Math.round((durationMs || 0) / 1000))
+  return `${totalSeconds}s`
+}
+
 export default function ChatDetail() {
   const router = useRouter()
   const params = router.params
@@ -85,6 +90,29 @@ export default function ChatDetail() {
   const [loading, setLoading] = useState(true)
   const [inputText, setInputText] = useState('')
   const [sending, setSending] = useState(false)
+  const [playingMessageId, setPlayingMessageId] = useState<number | null>(null)
+  const audioContextRef = useRef<Taro.InnerAudioContext | null>(null)
+
+  useEffect(() => {
+    const audioContext = Taro.createInnerAudioContext()
+    audioContextRef.current = audioContext
+
+    audioContext.onEnded(() => {
+      setPlayingMessageId(null)
+    })
+    audioContext.onStop(() => {
+      setPlayingMessageId(null)
+    })
+    audioContext.onError(() => {
+      setPlayingMessageId(null)
+      Taro.showToast({ title: '语音播放失败', icon: 'none' })
+    })
+
+    return () => {
+      audioContext.destroy()
+      audioContextRef.current = null
+    }
+  }, [])
 
   useEffect(() => {
     void loadChatData(activeConversationId)
@@ -157,6 +185,46 @@ export default function ChatDetail() {
     }
   }
 
+  const handlePlayAudio = (message: ChatMessage) => {
+    if (message.contentType !== 2 || !message.mediaUrl) {
+      Taro.showToast({ title: '语音地址不存在', icon: 'none' })
+      return
+    }
+
+    const audioContext = audioContextRef.current
+    if (!audioContext) {
+      Taro.showToast({ title: '播放器未就绪', icon: 'none' })
+      return
+    }
+
+    if (playingMessageId === message.id) {
+      audioContext.stop()
+      setPlayingMessageId(null)
+      return
+    }
+
+    audioContext.stop()
+    audioContext.src = message.mediaUrl
+    audioContext.autoplay = true
+    audioContext.play()
+    setPlayingMessageId(message.id)
+  }
+
+  const renderMessageBody = (msg: ChatMessage) => {
+    if (msg.contentType === 2 && msg.mediaUrl) {
+      const isPlaying = playingMessageId === msg.id
+      return (
+        <View className={`audio-bubble ${isPlaying ? 'playing' : ''}`} onClick={() => handlePlayAudio(msg)}>
+          <Text className='audio-bubble-icon'>{isPlaying ? '[]' : '>'}</Text>
+          <Text className='audio-bubble-text'>{msg.mediaTranscriptText || '点击播放语音'}</Text>
+          <Text className='audio-bubble-duration'>{formatAudioDuration(msg.mediaDurationMs)}</Text>
+        </View>
+      )
+    }
+
+    return <Text>{msg.content}</Text>
+  }
+
   return (
     <View className='chat-detail-page'>
       <View className='chat-header'>
@@ -199,7 +267,7 @@ export default function ChatDetail() {
                   <View className='message-main'>
                     <Text className='message-meta'>{formatParticipantLabel(msg)}</Text>
                     <View className='message-bubble'>
-                      <Text>{msg.content}</Text>
+                      {renderMessageBody(msg)}
                     </View>
                   </View>
                   <View className='user-avatar'>
@@ -214,7 +282,7 @@ export default function ChatDetail() {
                   <View className='message-main'>
                     <Text className='message-meta'>{formatParticipantLabel(msg)}</Text>
                     <View className='message-bubble'>
-                      <Text>{msg.content}</Text>
+                      {renderMessageBody(msg)}
                     </View>
                   </View>
                 </View>
diff --git a/banban-mini/src/pages/chat/index.tsx b/banban-mini/src/pages/chat/index.tsx
index a93fd6a..d6f1a11 100644
--- a/banban-mini/src/pages/chat/index.tsx
+++ b/banban-mini/src/pages/chat/index.tsx
@@ -65,7 +65,7 @@ export default function Chat() {
         </View>
       ) : conversations.length === 0 ? (
         <View className='empty-card'>
-          <Text className='empty-title'>暂无玩伴会话</Text>
+          <Text className='empty-title'>当前孩子暂无会话</Text>
         </View>
       ) : (
         <ScrollView className='conversation-list' scrollY>
diff --git a/banban-mini/src/pages/device/index.scss b/banban-mini/src/pages/device/index.scss
index 4cbf338..18dd9a2 100644
--- a/banban-mini/src/pages/device/index.scss
+++ b/banban-mini/src/pages/device/index.scss
@@ -348,6 +348,14 @@
   color: #1A1A1A;
 }
 
+.empty-subtitle {
+  display: block;
+  margin-top: 16px;
+  font-size: 26px;
+  line-height: 1.6;
+  color: #666666;
+}
+
 .empty-btn {
   margin-top: 28px;
   height: 92px;
@@ -378,3 +386,46 @@
   font-weight: 600;
   color: #1A1A1A;
 }
+
+.child-focus-card {
+  display: flex;
+  align-items: center;
+  background: #FFFFFF;
+  border-radius: 24px;
+  margin: 0 24px 24px;
+  padding: 28px 24px;
+  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
+}
+
+.child-focus-avatar {
+  width: 96px;
+  height: 96px;
+  border-radius: 50%;
+  background: #FEF3E8;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  margin-right: 20px;
+}
+
+.child-focus-icon {
+  font-size: 40px;
+}
+
+.child-focus-info {
+  flex: 1;
+}
+
+.child-focus-name {
+  display: block;
+  font-size: 32px;
+  font-weight: 700;
+  color: #1A1A1A;
+}
+
+.child-focus-desc {
+  display: block;
+  margin-top: 8px;
+  font-size: 26px;
+  color: #666666;
+}
diff --git a/banban-mini/src/pages/device/index.tsx b/banban-mini/src/pages/device/index.tsx
index 492c70c..cd54cc6 100644
--- a/banban-mini/src/pages/device/index.tsx
+++ b/banban-mini/src/pages/device/index.tsx
@@ -2,8 +2,8 @@ import { View, Text, Switch, Slider, Image } from '@tarojs/components'
 import { useState } from 'react'
 import Taro, { useDidShow } from '@tarojs/taro'
 import { getToken } from '@/services/auth'
-import { Binding, resolveActiveBinding } from '@/services/binding'
-import { Child, getChild } from '@/services/child'
+import { Binding, loadCurrentChildBindingContext } from '@/services/binding'
+import { Child } from '@/services/child'
 import './index.scss'
 
 export default function Device() {
@@ -25,20 +25,9 @@ export default function Device() {
 
     setIsLoading(true)
     try {
-      const activeBinding = await resolveActiveBinding()
-      setBinding(activeBinding)
-
-      if (activeBinding?.child_id) {
-        try {
-          const currentChild = await getChild(activeBinding.child_id)
-          setChild(currentChild)
-        } catch (error) {
-          console.error('[device] load child failed:', error)
-          setChild(null)
-        }
-      } else {
-        setChild(null)
-      }
+      const context = await loadCurrentChildBindingContext()
+      setChild(context.currentChild)
+      setBinding(context.currentBinding)
     } catch (error: any) {
       console.error('[device] load failed:', error)
       Taro.showToast({
@@ -72,7 +61,7 @@ export default function Device() {
     )
   }
 
-  if (!binding) {
+  if (!child) {
     return (
       <View className='device-page'>
         <View className='page-header'>
@@ -83,7 +72,39 @@ export default function Device() {
           <View className='empty-robot'>
             <Image className='robot-img' src={require('../../assets/tab-icons/robot.png')} mode='aspectFit' />
           </View>
-          <Text className='empty-title'>先绑定一台伴伴设备</Text>
+          <Text className='empty-title'>先添加一个儿童资料</Text>
+          <Text className='empty-subtitle'>添加后才能为孩子绑定专属设备并查看聊天和定位信息</Text>
+          <View className='empty-btn' onClick={() => Taro.switchTab({ url: '/pages/sleep/index' })}>
+            <Text className='empty-btn-text'>去添加孩子</Text>
+          </View>
+        </View>
+      </View>
+    )
+  }
+
+  if (!binding) {
+    return (
+      <View className='device-page'>
+        <View className='page-header'>
+          <Text className='page-title'>{child.child_name} 的伴伴</Text>
+        </View>
+
+        <View className='child-focus-card'>
+          <View className='child-focus-avatar'>
+            <Text className='child-focus-icon'>🧒</Text>
+          </View>
+          <View className='child-focus-info'>
+            <Text className='child-focus-name'>{child.child_name}</Text>
+            <Text className='child-focus-desc'>当前孩子已选中，还没有绑定设备</Text>
+          </View>
+        </View>
+
+        <View className='empty-card'>
+          <View className='empty-robot'>
+            <Image className='robot-img' src={require('../../assets/tab-icons/robot.png')} mode='aspectFit' />
+          </View>
+          <Text className='empty-title'>给当前孩子绑定一台设备</Text>
+          <Text className='empty-subtitle'>绑定后，这个孩子的聊天记录、定位和设备状态都会显示在首页</Text>
           <View className='empty-btn' onClick={() => Taro.navigateTo({ url: '/pages/bind/index' })}>
             <Text className='empty-btn-text'>去绑定设备</Text>
           </View>
@@ -92,8 +113,8 @@ export default function Device() {
     )
   }
 
-  const childName = child?.child_name || '未设置'
-  const pageTitle = child?.child_name ? `${child.child_name} 的伴伴` : '伴伴设备'
+  const childName = child.child_name || '未设置'
+  const pageTitle = `${childName} 的伴伴`
   const battery = 82
   const daysLeft = 4
 
@@ -106,7 +127,7 @@ export default function Device() {
       <View className='status-card'>
         <View className='status-badge'>
           <View className='status-dot'></View>
-          <Text className='status-text'>{binding.child_id ? '已完成绑定' : '待关联儿童'}</Text>
+          <Text className='status-text'>已完成绑定</Text>
         </View>
         <View className='battery-section'>
           <Text className='battery-percent'>
@@ -124,12 +145,12 @@ export default function Device() {
 
       <View className='detail-card'>
         <View className='detail-row'>
-          <Text className='detail-label'>设备号</Text>
-          <Text className='detail-value'>{binding.device_id}</Text>
+          <Text className='detail-label'>当前儿童</Text>
+          <Text className='detail-value'>{childName}</Text>
         </View>
         <View className='detail-row'>
-          <Text className='detail-label'>儿童昵称</Text>
-          <Text className='detail-value'>{childName}</Text>
+          <Text className='detail-label'>当前设备</Text>
+          <Text className='detail-value'>{binding.device_id}</Text>
         </View>
         <View className='detail-row'>
           <Text className='detail-label'>绑定时间</Text>
@@ -195,12 +216,6 @@ export default function Device() {
           </View>
         </View>
       </View>
-
-      {!binding.child_id && (
-        <View className='helper-card' onClick={() => Taro.navigateTo({ url: '/pages/bind/index' })}>
-          <Text className='helper-title'>继续完成儿童关联</Text>
-        </View>
-      )}
     </View>
   )
 }
diff --git a/banban-mini/src/pages/location/index.tsx b/banban-mini/src/pages/location/index.tsx
index 207aa17..eb59e99 100644
--- a/banban-mini/src/pages/location/index.tsx
+++ b/banban-mini/src/pages/location/index.tsx
@@ -26,8 +26,8 @@ const DEFAULT_COORDINATES = {
 
 const MODE_OPTIONS: Array<{ key: TrajectoryMode; label: string }> = [
   { key: 'current', label: '当前位置' },
-  { key: 'today', label: '今日轨迹' },
-  { key: 'recent', label: '最近点位' },
+  // { key: 'today', label: '今日轨迹' },
+  // { key: 'recent', label: '最近点位' },
 ]
 
 function formatTime(value?: string | null): string {
@@ -339,7 +339,7 @@ export default function Location() {
             </View>
           ) : (
             <View className='location-empty'>
-              <Text className='location-empty-title'>暂无设备位置</Text>
+              <Text className='location-empty-title'>当前孩子暂无设备位置</Text>
             </View>
           )
         ) : trajectory.length > 0 ? (
@@ -384,7 +384,7 @@ export default function Location() {
           <View className='location-empty'>
             <Text className='location-empty-title'>暂无轨迹</Text>
             <Text className='location-empty-desc'>
-              {trajectoryMode === 'today' ? '今天还没有新的历史点位。' : '最近时间范围内没有新的历史点位。'}
+              {trajectoryMode === 'today' ? '当前孩子今天还没有新的历史点位。' : '当前孩子最近没有新的历史点位。'}
             </Text>
           </View>
         )}
diff --git a/banban-mini/src/pages/login/index.tsx b/banban-mini/src/pages/login/index.tsx
index f0b98c8..1bc9834 100644
--- a/banban-mini/src/pages/login/index.tsx
+++ b/banban-mini/src/pages/login/index.tsx
@@ -62,9 +62,11 @@ export default function Login() {
       }, 300)
     } catch (error: any) {
       console.error('[login] failed:', error)
-      Taro.showToast({
-        title: error?.message || '登录失败，请重试',
-        icon: 'none',
+      const message = String(error?.message || '登录失败，请重试')
+      Taro.showModal({
+        title: '登录失败',
+        content: message,
+        showCancel: false,
       })
     } finally {
       Taro.hideLoading()
diff --git a/banban-mini/src/pages/sleep/index.tsx b/banban-mini/src/pages/sleep/index.tsx
index a788c25..6f55381 100644
--- a/banban-mini/src/pages/sleep/index.tsx
+++ b/banban-mini/src/pages/sleep/index.tsx
@@ -5,13 +5,11 @@ import { clearToken, getCurrentUserId, getToken } from '@/services/auth'
 import {
   BindingListItem,
   clearSelectedBindingDeviceId,
-  getBindings,
-  resolveBindingSelection,
-  setBindingChild,
+  loadCurrentChildBindingContext,
   setSelectedBindingDeviceId,
   unbindDevice,
 } from '@/services/binding'
-import { Child, createChild, getChildren, updateChild } from '@/services/child'
+import { Child, clearSelectedChildId, createChild, setSelectedChildId, updateChild } from '@/services/child'
 import './index.scss'
 
 interface MenuItem {
@@ -28,8 +26,9 @@ export default function Sleep() {
   const [children, setChildren] = useState<Child[]>([])
   const [bindings, setBindings] = useState<BindingListItem[]>([])
   const [binding, setBinding] = useState<BindingListItem | null>(null)
+  const [currentChild, setCurrentChild] = useState<Child | null>(null)
   const [showModal, setShowModal] = useState(false)
-  const [showDeviceModal, setShowDeviceModal] = useState(false)
+  const [showChildModal, setShowChildModal] = useState(false)
   const [modalType, setModalType] = useState<'add' | 'edit'>('add')
   const [childName, setChildName] = useState('')
   const [editingChildId, setEditingChildId] = useState<number | null>(null)
@@ -47,13 +46,11 @@ export default function Sleep() {
 
     setLoading(true)
     try {
-      const [childResponse, bindingResponse] = await Promise.all([getChildren(), getBindings(undefined, 100)])
-      const bindingItems = bindingResponse.items || []
-      const activeBinding = resolveBindingSelection(bindingItems)
-
-      setChildren(childResponse.items || [])
-      setBindings(bindingItems)
-      setBinding(activeBinding)
+      const context = await loadCurrentChildBindingContext()
+      setChildren(context.children)
+      setBindings(context.bindings as BindingListItem[])
+      setCurrentChild(context.currentChild)
+      setBinding((context.currentBinding as BindingListItem | null) || null)
       setParentInfo(Taro.getStorageSync('userInfo') || {})
     } catch (error: any) {
       console.error('[manage] load failed:', error)
@@ -66,8 +63,7 @@ export default function Sleep() {
     }
   }
 
-  const currentChild = binding?.child_id ? children.find((item) => item.child_id === binding.child_id) || null : null
-  const currentChildName = currentChild?.child_name || binding?.child_name || (binding && !binding.child_id ? '待关联' : '未设置')
+  const currentChildName = currentChild?.child_name || '未设置'
 
   const handleOpenModal = (type: 'add' | 'edit', child?: Child) => {
     setModalType(type)
@@ -82,12 +78,19 @@ export default function Sleep() {
     setEditingChildId(null)
   }
 
-  const handleSelectBinding = (targetBinding: BindingListItem) => {
-    setSelectedBindingDeviceId(targetBinding.device_id)
-    setBinding(targetBinding)
-    setShowDeviceModal(false)
+  const handleSelectChild = (child: Child) => {
+    setSelectedChildId(child.child_id)
+    const nextBinding = bindings.find((item) => item.child_id === child.child_id) || null
+    if (nextBinding?.device_id) {
+      setSelectedBindingDeviceId(nextBinding.device_id)
+    } else {
+      clearSelectedBindingDeviceId()
+    }
+    setCurrentChild(child)
+    setBinding(nextBinding)
+    setShowChildModal(false)
     Taro.showToast({
-      title: '已切换设备',
+      title: '已切换当前孩子',
       icon: 'success',
     })
   }
@@ -102,12 +105,8 @@ export default function Sleep() {
     try {
       if (modalType === 'add') {
         const createdChild = await createChild({ child_name: normalizedName })
-        if (binding && !binding.child_id) {
-          await setBindingChild(binding.device_id, { child_id: createdChild.child_id })
-          Taro.showToast({ title: '已创建并关联', icon: 'success' })
-        } else {
-          Taro.showToast({ title: '创建成功', icon: 'success' })
-        }
+        setSelectedChildId(createdChild.child_id)
+        Taro.showToast({ title: '创建成功', icon: 'success' })
       } else if (editingChildId) {
         await updateChild(editingChildId, { child_name: normalizedName })
         Taro.showToast({ title: '修改成功', icon: 'success' })
@@ -124,54 +123,19 @@ export default function Sleep() {
     }
   }
 
-  const handleChildMenu = () => {
-    if (binding && !binding.child_id && children.length > 0) {
-      Taro.showActionSheet({
-        itemList: [...children.map((item) => item.child_name), '新建儿童资料'],
-        success: async (result) => {
-          if (result.tapIndex === children.length) {
-            handleOpenModal('add')
-            return
-          }
-
-          const targetChild = children[result.tapIndex]
-          if (!targetChild) return
-
-          try {
-            await setBindingChild(binding.device_id, { child_id: targetChild.child_id })
-            Taro.showToast({ title: '关联成功', icon: 'success' })
-            await loadData()
-          } catch (error: any) {
-            Taro.showToast({
-              title: error?.message || '关联失败，请重试',
-              icon: 'none',
-            })
-          }
-        },
-      })
-      return
-    }
-
-    if (currentChild) {
-      handleOpenModal('edit', currentChild)
-      return
-    }
-
-    handleOpenModal('add')
-  }
-
   const handleUnbind = () => {
     if (!binding) return
 
     Taro.showModal({
       title: '解除设备绑定',
-      content: '确定要解除当前设备绑定吗？',
+      content: `确定要解除 ${currentChildName} 当前绑定的设备吗？`,
       confirmColor: '#FF8C42',
       success: async (result) => {
         if (!result.confirm) return
 
         try {
           await unbindDevice(binding.device_id)
+          clearSelectedBindingDeviceId()
           Taro.showToast({ title: '已解绑', icon: 'success' })
           await loadData()
         } catch (error: any) {
@@ -193,6 +157,7 @@ export default function Sleep() {
         if (!result.confirm) return
         clearToken()
         clearSelectedBindingDeviceId()
+        clearSelectedChildId()
         Taro.removeStorageSync('userInfo')
         Taro.reLaunch({ url: '/pages/login/index' })
       },
@@ -202,21 +167,33 @@ export default function Sleep() {
   const handleMenuClick = (item: MenuItem) => {
     if (item.disabled) return
 
-    if (item.name === '儿童资料 (用于称呼)') {
-      handleChildMenu()
+    if (item.name === '当前孩子') {
+      setShowChildModal(true)
       return
     }
 
-    if (item.name === '绑定新设备') {
+    if (item.name === '编辑当前孩子') {
+      if (currentChild) {
+        handleOpenModal('edit', currentChild)
+      } else {
+        handleOpenModal('add')
+      }
+      return
+    }
+
+    if (item.name === '绑定设备') {
+      if (!currentChild) {
+        handleOpenModal('add')
+        Taro.showToast({
+          title: '请先添加儿童资料',
+          icon: 'none',
+        })
+        return
+      }
       Taro.navigateTo({ url: '/pages/bind/index' })
       return
     }
 
-    if (item.name === '切换设备') {
-      setShowDeviceModal(true)
-      return
-    }
-
     if (item.name === '解除设备绑定') {
       handleUnbind()
     }
@@ -237,24 +214,24 @@ export default function Sleep() {
     {
       icon: require('../../assets/tab-icons/orange-robot.png'),
       iconBgClass: 'orange',
-      name: '儿童资料 (用于称呼)',
+      name: '当前孩子',
       value: currentChildName,
       arrow: true,
     },
-    {
-      icon: require('../../assets/tab-icons/rings.png'),
-      iconBgClass: 'green',
-      name: '切换设备',
-      value: bindings.length > 0 ? `共 ${bindings.length} 台` : '暂无设备',
-      arrow: true,
-    },
     {
       icon: require('../../assets/tab-icons/orange-robot.png'),
       iconBgClass: 'orange',
-      name: '绑定新设备',
+      name: '编辑当前孩子',
       value: '',
       arrow: true,
     },
+    {
+      icon: require('../../assets/tab-icons/rings.png'),
+      iconBgClass: 'green',
+      name: '绑定设备',
+      value: binding?.device_id ? `当前: ${binding.device_id}` : '未绑定',
+      arrow: true,
+    },
     {
       icon: require('../../assets/tab-icons/broken-rings.png'),
       iconBgClass: 'red',
@@ -284,23 +261,23 @@ export default function Sleep() {
           <Text className='user-role'>用户 ID: {userId || '--'}</Text>
         </View>
         <View className='verified-badge'>
-          <Text>{bindings.length > 0 ? `已绑定 ${bindings.length} 台` : '未绑定设备'}</Text>
+          <Text>{currentChild ? '已选择当前孩子' : '未选择孩子'}</Text>
         </View>
       </View>
 
       <View className='summary-card'>
         <View className='summary-row'>
-          <Text className='summary-label'>已绑定设备数</Text>
-          <Text className='summary-value'>{bindings.length} 台</Text>
-        </View>
-        <View className='summary-row'>
-          <Text className='summary-label'>当前设备</Text>
-          <Text className='summary-value'>{binding?.device_id || '未绑定'}</Text>
+          <Text className='summary-label'>儿童资料数</Text>
+          <Text className='summary-value'>{children.length} 个</Text>
         </View>
         <View className='summary-row'>
           <Text className='summary-label'>当前儿童</Text>
           <Text className='summary-value'>{currentChildName}</Text>
         </View>
+        <View className='summary-row'>
+          <Text className='summary-label'>当前设备</Text>
+          <Text className='summary-value'>{binding?.device_id || '未绑定'}</Text>
+        </View>
       </View>
 
       <View className='menu-card'>
@@ -333,39 +310,40 @@ export default function Sleep() {
         <Text className='version-text'>伴伴 Companion V1.1.0</Text>
       </View>
 
-      {showDeviceModal && (
-        <View className='modal-mask' onClick={() => setShowDeviceModal(false)}>
+      {showChildModal && (
+        <View className='modal-mask' onClick={() => setShowChildModal(false)}>
           <View
             className='modal-card device-switch-card'
             onClick={(event) => {
               event.stopPropagation()
             }}
           >
-            <Text className='modal-title'>切换设备</Text>
-            {bindings.length === 0 ? (
-              <Text className='device-switch-empty'>当前还没有已绑定设备</Text>
+            <Text className='modal-title'>切换当前孩子</Text>
+            {children.length === 0 ? (
+              <Text className='device-switch-empty'>当前还没有儿童资料</Text>
             ) : (
               <View className='device-switch-list'>
-                {bindings.map((item) => {
-                  const isActive = binding?.device_id === item.device_id
+                {children.map((item) => {
+                  const isActive = currentChild?.child_id === item.child_id
+                  const itemBinding = bindings.find((bindingItem) => bindingItem.child_id === item.child_id) || null
                   return (
                     <View
-                      key={item.device_id}
+                      key={item.child_id}
                       className={`device-switch-item ${isActive ? 'active' : ''}`}
-                      onClick={() => handleSelectBinding(item)}
+                      onClick={() => handleSelectChild(item)}
                     >
                       <View className='device-switch-head'>
-                        <Text className='device-switch-id'>{item.device_id}</Text>
+                        <Text className='device-switch-id'>{item.child_name}</Text>
                         {isActive && <Text className='device-switch-tag'>当前</Text>}
                       </View>
-                      <Text className='device-switch-name'>{item.child_name || '待关联儿童'}</Text>
+                      <Text className='device-switch-name'>{itemBinding?.device_id || '未绑定设备'}</Text>
                     </View>
                   )
                 })}
               </View>
             )}
             <View className='modal-actions'>
-              <Text className='modal-action cancel' onClick={() => setShowDeviceModal(false)}>
+              <Text className='modal-action cancel' onClick={() => setShowChildModal(false)}>
                 关闭
               </Text>
             </View>
diff --git a/banban-mini/src/services/api.ts b/banban-mini/src/services/api.ts
index bda8f4d..c6ff480 100644
--- a/banban-mini/src/services/api.ts
+++ b/banban-mini/src/services/api.ts
@@ -13,6 +13,7 @@ class ApiError extends Error {
 
 function getErrorDetail(data: any): string {
   if (!data) return 'Request failed'
+  if (typeof data.errMsg === 'string') return data.errMsg
   if (typeof data.detail === 'string') return data.detail
   if (Array.isArray(data.detail)) {
     return data.detail.map((item: any) => String(item?.msg || item)).join('; ')
@@ -30,6 +31,8 @@ async function request<T>(
   } = {}
 ): Promise<T> {
   const token = getToken()
+  const requestUrl = `${BASE_URL}${url}`
+  const requestMethod = options.method || 'GET'
   const headers: Record<string, string> = {
     'Content-Type': 'application/json',
     ...options.headers,
@@ -41,22 +44,19 @@ async function request<T>(
   let response
   try {
     response = await Taro.request({
-      url: `${BASE_URL}${url}`,
-      method: options.method || 'GET',
+      url: requestUrl,
+      method: requestMethod,
       data: options.data,
       header: headers,
       timeout: REQUEST_TIMEOUT_MS,
     })
   } catch (error: any) {
-    const message = String(error?.errMsg || error?.message || '')
-    const detail = message.includes('timeout')
-      ? '请求超时，请检查后端服务是否可访问'
-      : '网络请求失败，请检查后端地址和网络连接'
-    throw new ApiError(0, detail)
+    const message = String(error?.errMsg || error?.message || 'request:fail')
+    throw new ApiError(0, message)
   }
 
   if (response.statusCode === 401) {
-    handleUnauthorized({ redirect: !url.startsWith('/auth/') })
+    handleUnauthorized({ redirect: !url.startsWith('/banban/auth/') })
   }
 
   if (response.statusCode >= 400) {
diff --git a/banban-mini/src/services/auth.ts b/banban-mini/src/services/auth.ts
index 9b2ef9a..cc09b57 100644
--- a/banban-mini/src/services/auth.ts
+++ b/banban-mini/src/services/auth.ts
@@ -30,7 +30,7 @@ export interface Parent {
 }
 
 export async function wechatLogin(data: WechatLoginPayload): Promise<LoginSession> {
-  const session = await request<LoginSession>('/auth/login', {
+  const session = await request<LoginSession>('/banban/auth/login', {
     method: 'POST',
     data,
   })
@@ -39,14 +39,14 @@ export async function wechatLogin(data: WechatLoginPayload): Promise<LoginSessio
 }
 
 export async function getParent(userId: number): Promise<Parent> {
-  return request<Parent>(`/parents/${userId}`)
+  return request<Parent>(`/banban/parents/${userId}`)
 }
 
 export async function updateParent(
   userId: number,
   data: { nickname?: string; avatar_url?: string; phone?: string }
 ): Promise<Parent> {
-  return request<Parent>(`/parents/${userId}`, {
+  return request<Parent>(`/banban/parents/${userId}`, {
     method: 'PATCH',
     data,
   })
diff --git a/banban-mini/src/services/binding.ts b/banban-mini/src/services/binding.ts
index e0501a5..97e66db 100644
--- a/banban-mini/src/services/binding.ts
+++ b/banban-mini/src/services/binding.ts
@@ -1,5 +1,7 @@
 import Taro from '@tarojs/taro'
+
 import { request } from './api'
+import { Child, clearSelectedChildId, getChildren, resolveChildSelection, setSelectedChildId } from './child'
 
 const SELECTED_BINDING_DEVICE_ID_KEY = 'selectedBindingDeviceId'
 
@@ -26,12 +28,38 @@ export interface BindingListResponse {
   next_cursor?: number | null
 }
 
+export interface BindingChildContext {
+  currentChild: Child | null
+  currentBinding: Binding | null
+}
+
 export interface DirectBindPayload {
   device_id: string
   serial_number: string
   child_id?: number
 }
 
+export interface NFCSessionStartPayload {
+  device_id: string
+  serial_number: string
+  child_id?: number
+}
+
+export interface NFCSessionStartResponse {
+  bind_token: string
+  expires_at: string
+  status: number
+}
+
+export interface NFCSessionStatus {
+  bind_token: string
+  device_id: string
+  child_id: number | null
+  status: number
+  expires_at: string
+  card_uuid?: string | null
+}
+
 export function getSelectedBindingDeviceId(): string | null {
   const value = Taro.getStorageSync(SELECTED_BINDING_DEVICE_ID_KEY)
   const deviceId = String(value || '').trim()
@@ -67,7 +95,7 @@ export function resolveBindingSelection<T extends { device_id: string }>(items:
 
 export async function getCurrentBinding(): Promise<Binding | null> {
   try {
-    return await request<Binding>('/bindings/current')
+    return await request<Binding>('/banban/bindings/current')
   } catch (error: any) {
     if (error?.status === 404) return null
     throw error
@@ -75,16 +103,13 @@ export async function getCurrentBinding(): Promise<Binding | null> {
 }
 
 export async function getBindings(cursor?: number, limit: number = 20): Promise<BindingListResponse> {
-  const query = buildQuery({
-    cursor,
-    limit,
-  })
-  return request<BindingListResponse>(`/bindings?${query}`)
+  const query = buildQuery({ cursor, limit })
+  return request<BindingListResponse>(`/banban/bindings?${query}`)
 }
 
 export async function getBinding(deviceId: string): Promise<Binding | null> {
   try {
-    return await request<Binding>(`/bindings/${deviceId}`)
+    return await request<Binding>(`/banban/bindings/${deviceId}`)
   } catch (error: any) {
     if (error?.status === 404) return null
     throw error
@@ -100,7 +125,6 @@ export async function resolveActiveBinding(): Promise<Binding | null> {
       setSelectedBindingDeviceId(selectedBinding.device_id)
       return selectedBinding
     }
-
     clearSelectedBindingDeviceId()
   }
 
@@ -115,24 +139,92 @@ export async function resolveActiveBinding(): Promise<Binding | null> {
 }
 
 export async function directBind(data: DirectBindPayload): Promise<{ device_id: string; child_id: number | null }> {
-  return request('/bindings/direct', {
+  return request('/banban/bindings/direct', { method: 'POST', data })
+}
+
+export async function startNFCBind(data: NFCSessionStartPayload): Promise<NFCSessionStartResponse> {
+  return request<NFCSessionStartResponse>('/banban/bindings/start', {
     method: 'POST',
     data,
   })
 }
 
+export async function getNFCBindSession(bindToken: string): Promise<NFCSessionStatus> {
+  return request<NFCSessionStatus>(`/banban/bindings/sessions/${bindToken}`)
+}
+
 export async function setBindingChild(
   deviceId: string,
   data: { child_id: number }
 ): Promise<{ device_id: string; child_id: number | null }> {
-  return request(`/bindings/${deviceId}/child`, {
+  return request(`/banban/bindings/${deviceId}/child`, {
     method: 'PATCH',
     data,
   })
 }
 
 export async function unbindDevice(deviceId: string): Promise<void> {
-  return request(`/bindings/${deviceId}`, {
+  return request(`/banban/bindings/${deviceId}`, {
     method: 'DELETE',
   })
 }
+
+export function resolveBindingForChild<T extends { child_id: number | null }>(
+  items: T[],
+  childId?: number | null
+): T | null {
+  const normalizedChildId = Number(childId || 0)
+  if (!Number.isFinite(normalizedChildId) || normalizedChildId <= 0) return null
+
+  const childBindings = items.filter((item) => item.child_id === normalizedChildId)
+  if (childBindings.length === 0) return null
+
+  const selectedDeviceId = getSelectedBindingDeviceId()
+  if (selectedDeviceId) {
+    const selectedBinding = childBindings.find((item: any) => item.device_id === selectedDeviceId) || null
+    if (selectedBinding) return selectedBinding
+  }
+
+  return childBindings[0] || null
+}
+
+export function syncChildAndBindingSelection(children: Child[], bindings: Binding[]): BindingChildContext {
+  const currentChild = resolveChildSelection(children)
+  const currentBinding = currentChild ? resolveBindingForChild(bindings, currentChild.child_id) : null
+
+  if (currentChild) {
+    setSelectedChildId(currentChild.child_id)
+  } else {
+    clearSelectedChildId()
+  }
+
+  if (currentBinding?.device_id) {
+    setSelectedBindingDeviceId(currentBinding.device_id)
+  } else {
+    clearSelectedBindingDeviceId()
+  }
+
+  return {
+    currentChild,
+    currentBinding,
+  }
+}
+
+export async function loadCurrentChildBindingContext(): Promise<{
+  children: Child[]
+  bindings: Binding[]
+  currentChild: Child | null
+  currentBinding: Binding | null
+}> {
+  const [childResponse, bindingResponse] = await Promise.all([getChildren(undefined, 100), getBindings(undefined, 100)])
+  const children = childResponse.items || []
+  const bindings = bindingResponse.items || []
+  const { currentChild, currentBinding } = syncChildAndBindingSelection(children, bindings)
+
+  return {
+    children,
+    bindings,
+    currentChild,
+    currentBinding,
+  }
+}
diff --git a/banban-mini/src/services/chat.ts b/banban-mini/src/services/chat.ts
index b5b8505..55d71ab 100644
--- a/banban-mini/src/services/chat.ts
+++ b/banban-mini/src/services/chat.ts
@@ -1,7 +1,6 @@
 import { getCurrentUserId } from './auth'
 import { request } from './api'
-import { resolveActiveBinding } from './binding'
-import { getChild } from './child'
+import { loadCurrentChildBindingContext } from './binding'
 
 export type ConversationSource = 'im' | 'ai'
 export type PeerKind = 'child' | 'parent' | 'ai'
@@ -38,6 +37,11 @@ export interface ChatMessage {
   content: string
   time: string
   conversationId: number
+  contentType?: number
+  mediaUrl?: string | null
+  mediaDurationMs?: number | null
+  mediaMimeType?: string | null
+  mediaTranscriptText?: string | null
   senderType?: string
   senderId?: string
   receiverType?: string
@@ -240,21 +244,12 @@ function getConversationRank(conversation: ChatConversation): number {
 }
 
 async function getBindingContext(): Promise<BindingContext> {
-  const binding = await resolveActiveBinding()
-  let childName = String(binding?.child_name || '').trim()
-
-  if (!childName && binding?.child_id) {
-    try {
-      const child = await getChild(binding.child_id)
-      childName = String(child?.child_name || '').trim()
-    } catch (error) {
-      console.error('[chat] load child name failed:', error)
-    }
-  }
+  const context = await loadCurrentChildBindingContext()
+  const childName = String(context.currentChild?.child_name || context.currentBinding?.child_name || '').trim()
 
   return {
-    deviceId: binding?.device_id || '',
-    childId: binding?.child_id || null,
+    deviceId: context.currentBinding?.device_id || '',
+    childId: context.currentChild?.child_id || null,
     childName,
     currentUserId: getCurrentUserId(),
   }
@@ -265,7 +260,7 @@ async function getDeviceMessages(context?: BindingContext): Promise<DeviceAiMess
   if (!deviceId) return []
 
   try {
-    const response = await request<DeviceAiMessageListResponse>(`/devices/${deviceId}/messages?limit=100`)
+    const response = await request<DeviceAiMessageListResponse>(`/banban/devices/${deviceId}/messages?limit=100`)
     return response.items || []
   } catch (error: any) {
     if (error?.status === 404) return []
@@ -278,7 +273,7 @@ async function getChildConversations(context?: BindingContext): Promise<ChildCon
   if (!childId) return []
 
   try {
-    const response = await request<ChildConversationListResponse>(`/children/${childId}/conversations?limit=100`)
+    const response = await request<ChildConversationListResponse>(`/banban/children/${childId}/conversations?limit=100`)
     return response.items || []
   } catch (error: any) {
     if (error?.status === 404) return []
@@ -294,7 +289,7 @@ async function getChildConversationMessages(
   if (!childId || conversationId <= 0) return []
 
   const response = await request<ChildConversationMessageListResponse>(
-    `/children/${childId}/conversations/${conversationId}/messages?limit=100`
+    `/banban/children/${childId}/conversations/${conversationId}/messages?limit=100`
   )
   return response.items || []
 }
@@ -437,6 +432,11 @@ export async function getMessages(
         content: item.content || '暂无内容',
         time: formatDetailTime(item.created_at),
         conversationId: item.conversation_id,
+        contentType: 1,
+        mediaUrl: null,
+        mediaDurationMs: null,
+        mediaMimeType: null,
+        mediaTranscriptText: null,
         senderType: item.is_user ? 'device' : 'ai',
         senderId: item.is_user ? context.deviceId : item.role_key,
         receiverType: item.is_user ? 'ai' : 'device',
@@ -462,6 +462,11 @@ export async function getMessages(
     content: formatImPreview(item),
     time: formatDetailTime(item.created_at),
     conversationId: item.conversation_id,
+    contentType: item.content_type,
+    mediaUrl: item.media_file_key || null,
+    mediaDurationMs: item.media_duration_ms || null,
+    mediaMimeType: item.media_mime_type || null,
+    mediaTranscriptText: item.media_transcript_text || null,
     senderType: item.sender_type,
     senderId: item.sender_id,
     receiverType: item.receiver_type,
@@ -580,7 +585,7 @@ export async function sendParentMessage(childId: number, content: string): Promi
     throw new Error('请输入消息内容')
   }
 
-  return request<ConversationMessageCreateResponse>(`/children/${childId}/messages`, {
+  return request<ConversationMessageCreateResponse>(`/banban/children/${childId}/messages`, {
     method: 'POST',
     data: {
       content_type: 1,
diff --git a/banban-mini/src/services/child.ts b/banban-mini/src/services/child.ts
index 67b8f29..f645901 100644
--- a/banban-mini/src/services/child.ts
+++ b/banban-mini/src/services/child.ts
@@ -1,5 +1,8 @@
+import Taro from '@tarojs/taro'
 import { request } from './api'
 
+const SELECTED_CHILD_ID_KEY = 'selectedChildId'
+
 function buildQuery(params: Record<string, string | number | undefined | null>): string {
   return Object.entries(params)
     .filter(([, value]) => value !== undefined && value !== null && value !== '')
@@ -21,12 +24,44 @@ export interface ChildListResponse {
   next_cursor?: number | null
 }
 
+export function getSelectedChildId(): number | null {
+  const value = Number(Taro.getStorageSync(SELECTED_CHILD_ID_KEY) || 0)
+  return Number.isFinite(value) && value > 0 ? value : null
+}
+
+export function setSelectedChildId(childId?: number | null) {
+  const normalizedChildId = Number(childId || 0)
+  if (!Number.isFinite(normalizedChildId) || normalizedChildId <= 0) {
+    Taro.removeStorageSync(SELECTED_CHILD_ID_KEY)
+    return
+  }
+  Taro.setStorageSync(SELECTED_CHILD_ID_KEY, normalizedChildId)
+}
+
+export function clearSelectedChildId() {
+  Taro.removeStorageSync(SELECTED_CHILD_ID_KEY)
+}
+
+export function resolveChildSelection<T extends { child_id: number }>(items: T[]): T | null {
+  const selectedChildId = getSelectedChildId()
+  const selectedChild = selectedChildId ? items.find((item) => item.child_id === selectedChildId) || null : null
+  const currentChild = selectedChild || items[0] || null
+
+  if (currentChild) {
+    setSelectedChildId(currentChild.child_id)
+  } else {
+    clearSelectedChildId()
+  }
+
+  return currentChild
+}
+
 export async function createChild(data: {
   child_name: string
   child_gender?: number
   child_birthday?: string
 }): Promise<Child> {
-  return request<Child>('/children', {
+  return request<Child>('/banban/children', {
     method: 'POST',
     data,
   })
@@ -37,18 +72,18 @@ export async function getChildren(cursor?: number, limit: number = 20): Promise<
     cursor,
     limit,
   })
-  return request<ChildListResponse>(`/children?${query}`)
+  return request<ChildListResponse>(`/banban/children?${query}`)
 }
 
 export async function getChild(childId: number): Promise<Child> {
-  return request<Child>(`/children/${childId}`)
+  return request<Child>(`/banban/children/${childId}`)
 }
 
 export async function updateChild(
   childId: number,
   data: { child_name?: string; child_gender?: number; child_birthday?: string }
 ): Promise<Child> {
-  return request<Child>(`/children/${childId}`, {
+  return request<Child>(`/banban/children/${childId}`, {
     method: 'PATCH',
     data,
   })
diff --git a/banban-mini/src/services/location.ts b/banban-mini/src/services/location.ts
index 7375451..2d5948d 100644
--- a/banban-mini/src/services/location.ts
+++ b/banban-mini/src/services/location.ts
@@ -1,5 +1,5 @@
 import { request } from './api'
-import { resolveActiveBinding } from './binding'
+import { loadCurrentChildBindingContext } from './binding'
 
 export interface DeviceLocation {
   child_id: number
@@ -32,11 +32,12 @@ export interface DeviceTrajectoryResponse {
 }
 
 export async function getCurrentDeviceLocation(deviceId?: string): Promise<DeviceLocation | null> {
-  const resolvedDeviceId = String(deviceId || '').trim() || (await resolveActiveBinding())?.device_id || ''
+  const resolvedDeviceId =
+    String(deviceId || '').trim() || (await loadCurrentChildBindingContext()).currentBinding?.device_id || ''
   if (!resolvedDeviceId) return null
 
   try {
-    return await request<DeviceLocation>(`/devices/${resolvedDeviceId}/location`)
+    return await request<DeviceLocation>(`/banban/devices/${resolvedDeviceId}/location`)
   } catch (error: any) {
     if (error?.status === 404) return null
     throw error
@@ -49,7 +50,8 @@ export async function getDeviceTrajectory(params?: {
   endAt?: string
   limit?: number
 }): Promise<DeviceTrajectoryResponse | null> {
-  const resolvedDeviceId = String(params?.deviceId || '').trim() || (await resolveActiveBinding())?.device_id || ''
+  const resolvedDeviceId =
+    String(params?.deviceId || '').trim() || (await loadCurrentChildBindingContext()).currentBinding?.device_id || ''
   if (!resolvedDeviceId) return null
 
   const query = new URLSearchParams()
@@ -59,7 +61,7 @@ export async function getDeviceTrajectory(params?: {
 
   try {
     const suffix = query.toString() ? `?${query.toString()}` : ''
-    return await request<DeviceTrajectoryResponse>(`/devices/${resolvedDeviceId}/trajectory${suffix}`)
+    return await request<DeviceTrajectoryResponse>(`/banban/devices/${resolvedDeviceId}/trajectory${suffix}`)
   } catch (error: any) {
     if (error?.status === 404) return null
     throw error