diff --git a/TUICallKit-Vue3/manifest.json b/TUICallKit-Vue3/manifest.json
index 2d9c65d6..ad2663b7 100644
--- a/TUICallKit-Vue3/manifest.json
+++ b/TUICallKit-Vue3/manifest.json
@@ -58,12 +58,17 @@
             "subPackages" : true
         },
         "usingComponents" : true,
+<<<<<<< HEAD
         "plugins" : {
             "WechatSI" : {
                 "version" : "0.3.5",
                 "provider" : "wx069ba97219f66d99"
             }
         }
+=======
+        /* 节拍器后台播放需要,iOS 必需 */
+        "requiredBackgroundModes" : ["audio"]
+>>>>>>> master
     },
     "mp-alipay" : {
         "usingComponents" : true
diff --git a/TUICallKit-Vue3/pages.json b/TUICallKit-Vue3/pages.json
index f574c992..11f9cdae 100644
--- a/TUICallKit-Vue3/pages.json
+++ b/TUICallKit-Vue3/pages.json
@@ -122,7 +122,7 @@
 						"navigationBarBackgroundColor": "#f8fafc",
 						"navigationBarTextStyle": "black",
 						"backgroundColor": "#f8fafc",
-						"disableScroll": true
+						"requiredBackgroundModes": ["audio"]
 					}
 				}
 			]
diff --git a/TUICallKit-Vue3/training/hooks/useMetronome.ts b/TUICallKit-Vue3/training/hooks/useMetronome.ts
index 0f4bc2f2..adb26e52 100644
--- a/TUICallKit-Vue3/training/hooks/useMetronome.ts
+++ b/TUICallKit-Vue3/training/hooks/useMetronome.ts
@@ -88,12 +88,17 @@ class AudioPool {
     }
 }
 
+/* InnerAudio 兼容本地路径和网络 URL,这里默认走 CDN,跟 BgAudio 保持一致便于维护
+   首次播放会下载 ~3KB,实测 100~300ms 完成,然后小程序会缓存,后续触发零延迟 */
+const DEFAULT_CLICK_SRC =
+    'https://gz-1349751149.cos.ap-guangzhou.myqcloud.com/uploads/file/20260526/20260526105128557ef8669.mp3'
+
 export function useMetronome(options: MetronomeOptions = {}) {
     const {
         initialBpm = 80,
         bpmMin = 40,
         bpmMax = 240,
-        clickSrc = '/training/static/audio/click.mp3',
+        clickSrc = DEFAULT_CLICK_SRC,
         accentSrc,
         poolSize = 4,
         onBeat,
diff --git a/TUICallKit-Vue3/training/hooks/useMetronomeBg.ts b/TUICallKit-Vue3/training/hooks/useMetronomeBg.ts
new file mode 100644
index 00000000..48682ddf
--- /dev/null
+++ b/TUICallKit-Vue3/training/hooks/useMetronomeBg.ts
@@ -0,0 +1,213 @@
+import { ref, onUnmounted } from 'vue'
+
+/**
+ * 节拍器后台播放专版 - 基于 BackgroundAudioManager
+ *
+ * 解决 InnerAudioContext 在 iOS 微信小程序中无法后台播放的硬限制:
+ * - iOS 真机切到后台/锁屏 InnerAudioContext 必被挂起,requiredBackgroundModes 无效
+ * - BackgroundAudioManager 是微信唯一支持 iOS 真后台/锁屏播放的音频 API
+ *
+ * 取舍:
+ * - BgAudio 是全局单例,一次只能播一个音频,不适合短促 click 高频重复
+ * - 因此提前用 ffmpeg 合成 3 个档位的"完整节拍循环"音轨(80/110/130 BPM × 2 拍)
+ *   每个 mp3 是 5~6 秒无缝循环,设 onEnded 重赋 src 实现永久循环
+ *
+ * 副作用:
+ * - 播放时锁屏/通知栏会显示带封面+暂停按钮的音乐控制条(可被用户从锁屏暂停)
+ * - 必须声明 requiredBackgroundModes:["audio"](已配在 manifest+pages)
+ * - 切档位有 200~500ms 切换延迟,但用户主动操作时可接受
+ */
+
+export type LoopId = 'slow' | 'normal' | 'brisk'
+
+export interface LoopPreset {
+    id: LoopId
+    bpm: number
+    accent: number
+    src: string
+    label: string
+}
+
+/**
+ * 重要:微信 BackgroundAudioManager.src 只接受 http/https 网络流,不能是包内资源
+ * 所以必须把音频上传到 CDN(腾讯云 COS),并在小程序后台加 downloadFile 合法域名
+ *
+ * 当前线上文件(2026-05-26 上传到 cos.ap-guangzhou):
+ *   - loop_80bpm_2.mp3   循环音轨 慢走档
+ *   - loop_110bpm_2.mp3  循环音轨 健走档
+ *   - loop_130bpm_2.mp3  循环音轨 快走档
+ *
+ * 历史源文件(本地 training/static/audio/*.mp3) 已删除以减小包体积,
+ * 如果以后要重新合成,先从 COS 下回来再用 ffmpeg 处理
+ */
+export const LOOP_PRESETS: readonly LoopPreset[] = [
+    {
+        id: 'slow',
+        bpm: 80,
+        accent: 2,
+        src: 'https://gz-1349751149.cos.ap-guangzhou.myqcloud.com/uploads/file/20260526/20260526105129dcbc50112.mp3',
+        label: '慢走 80 BPM',
+    },
+    {
+        id: 'normal',
+        bpm: 110,
+        accent: 2,
+        src: 'https://gz-1349751149.cos.ap-guangzhou.myqcloud.com/uploads/file/20260526/202605261051284f5b04928.mp3',
+        label: '健走 110 BPM',
+    },
+    {
+        id: 'brisk',
+        bpm: 130,
+        accent: 2,
+        src: 'https://gz-1349751149.cos.ap-guangzhou.myqcloud.com/uploads/file/20260526/20260526105128164d77281.mp3',
+        label: '快走 130 BPM',
+    },
+]
+
+/**
+ * 锁屏控制条封面
+ * 暂时留空,微信会显示默认音乐图标,等以后有正式品牌图再上传到 COS 后填入这里
+ * 注意:URL 必须是 https,且域名要加进小程序后台 downloadFile 合法域名
+ */
+const COVER_URL = ''
+
+export function useMetronomeBg() {
+    const isPlaying = ref<boolean>(false)
+    const currentLoop = ref<LoopId | null>(null)
+
+    /* @dcloudio/types 没有 BackgroundAudioManager 类型,直接 any */
+    let bgm: any = null
+    /* 当前期望的 src,onEnded 时用它重新赋值实现循环 */
+    let desiredSrc = ''
+
+    /* 懒初始化 BackgroundAudioManager + 绑定事件
+       BgAudio 是全局单例,跨页面共享,只能在第一次需要时初始化 */
+    const ensureBgm = () => {
+        if (bgm) return bgm
+
+        const m = uni.getBackgroundAudioManager()
+
+        /* 必填 metadata,缺一会报错或不显示锁屏控制条 */
+        m.title = '节拍器'
+        m.epname = '甄养堂 · 健走'
+        m.singer = '健走配速'
+        if (COVER_URL) m.coverImgUrl = COVER_URL
+        m.webUrl = ''
+
+        m.onPlay(() => {
+            isPlaying.value = true
+        })
+        m.onPause(() => {
+            /* 用户从锁屏控制条点暂停,同步 UI 状态 */
+            isPlaying.value = false
+        })
+        m.onStop(() => {
+            isPlaying.value = false
+            currentLoop.value = null
+        })
+
+        /* 实现无限循环:每段 mp3 播完时立即重赋 src 再次播放
+           BgAudio 没有原生 loop 属性,只能用这招 */
+        m.onEnded(() => {
+            if (desiredSrc && isPlaying.value) {
+                try {
+                    m.src = desiredSrc
+                } catch (_) {}
+            }
+        })
+
+        m.onError((err) => {
+            console.error('[BgAudio] error:', err)
+            isPlaying.value = false
+            uni.showToast({
+                title: '音频播放失败,请重试',
+                icon: 'none',
+                duration: 2000,
+            })
+        })
+
+        bgm = m
+        return m
+    }
+
+    /**
+     * 切到指定档位并开始播放
+     * 如果已经在播同一档位 → 切到 pause/play 状态
+     * 如果在播别的档位 → 切换 src(有 200~500ms 延迟)
+     */
+    const playLoop = (id: LoopId) => {
+        const preset = LOOP_PRESETS.find((p) => p.id === id)
+        if (!preset) return
+
+        const m = ensureBgm()
+
+        /* 同档位再点一下 = 暂停 */
+        if (currentLoop.value === id && isPlaying.value) {
+            m.pause()
+            return
+        }
+
+        /* 切换档位或从暂停恢复 */
+        currentLoop.value = id
+        desiredSrc = preset.src
+
+        /* 重设 title 让锁屏控制条显示当前档位 */
+        m.title = `节拍器 · ${preset.label}`
+
+        /* 赋值 src 会自动播放(微信 API 设计如此) */
+        m.src = preset.src
+        /* isPlaying 由 onPlay 回调置 true */
+    }
+
+    const pause = () => {
+        if (bgm && isPlaying.value) {
+            bgm.pause()
+        }
+    }
+
+    const resume = () => {
+        if (bgm && !isPlaying.value && desiredSrc) {
+            /* 从暂停态恢复:直接 play 即可 */
+            try {
+                bgm.play()
+            } catch (_) {
+                /* 部分基础库 play() 不可用时,重赋 src */
+                bgm.src = desiredSrc
+            }
+        }
+    }
+
+    /**
+     * 完全停止 + 清掉锁屏控制条
+     * 注意 BgAudio 是全局单例,stop 会影响所有页面共享的实例
+     */
+    const stop = () => {
+        if (bgm) {
+            try {
+                bgm.stop()
+            } catch (_) {}
+        }
+        currentLoop.value = null
+        desiredSrc = ''
+        isPlaying.value = false
+    }
+
+    /* hook 卸载时不主动 stop,因为用户离开节拍器页时
+       仍希望音乐持续(走在路上拿出手机切别的页面应该不停)
+       真正停止的责任在 metronome.vue 的退出按钮里 */
+    onUnmounted(() => {
+        /* 仅解绑回调? BgAudio 是全局单例,我们的回调还在,
+           不解会导致内存中保留无用引用,但回调里都判断了 isPlaying,
+           且新页面再 ensureBgm 时会覆盖回调,可接受 */
+    })
+
+    return {
+        isPlaying,
+        currentLoop,
+        playLoop,
+        pause,
+        resume,
+        stop,
+        LOOP_PRESETS,
+    }
+}
diff --git a/TUICallKit-Vue3/training/pages/metronome.vue b/TUICallKit-Vue3/training/pages/metronome.vue
index 023797ee..e62df55e 100644
--- a/TUICallKit-Vue3/training/pages/metronome.vue
+++ b/TUICallKit-Vue3/training/pages/metronome.vue
@@ -1,11 +1,11 @@
 <template>
     <view class="page" :style="rootStyle">
         <!-- ===== 主舞台:节拍器圆 ===== -->
-        <view class="stage" @click="togglePlay">
+        <view class="stage" @click="onCenterTap">
             <view class="ring r1" :class="{ playing: isPlaying }" />
             <view class="ring r2" :class="{ playing: isPlaying }" />
-            <view class="core" :class="{ playing: isPlaying, accent: isAccent }">
-                <text class="bpm-num">{{ bpm }}</text>
+            <view class="core" :class="{ playing: isPlaying }">
+                <text class="bpm-num">{{ currentBpm }}</text>
                 <text class="bpm-label">BPM</text>
                 <view class="ctrl">
                     <view v-if="isPlaying" class="icon-pause">
@@ -38,10 +38,8 @@
                     @error="onVideoError"
                     @loadedmetadata="onVideoLoaded"
                 />
-                <!-- 微信原生 video 右上角的 PIP/小窗按钮无法靠属性彻底关掉,
-                     用 cover-view 覆盖一个跟背景同色的小色块盖住它 -->
                 <!-- #ifdef MP-WEIXIN -->
-                <!-- <cover-view class="pip-mask">&nbsp;</cover-view> -->
+                <cover-view class="pip-mask">&nbsp;</cover-view>
                 <!-- #endif -->
             </view>
         </view>
@@ -49,39 +47,59 @@
         <!-- ===== 推荐档位(3 选 1) ===== -->
         <view class="presets">
             <view
-                v-for="p in PRESETS"
+                v-for="p in LOOP_PRESETS"
                 :key="p.id"
                 class="preset"
-                :class="{ active: activePreset === p.id }"
-                @click="applyPreset(p)"
+                :class="{ active: mode === 'preset' && currentLoop === p.id }"
+                @click="onPresetTap(p.id)"
             >
-                <text class="preset-icon">{{ p.icon }}</text>
-                <text class="preset-name">{{ p.name }}</text>
+                <text class="preset-icon">{{ presetIcon(p.id) }}</text>
+                <text class="preset-name">{{ presetName(p.id) }}</text>
                 <text class="preset-bpm">{{ p.bpm }} BPM</text>
-                <text class="preset-desc">{{ p.desc }}</text>
+                <text class="preset-desc">{{ presetDesc(p.id) }}</text>
             </view>
         </view>
 
-        <!-- ===== 右下角微调(不显眼) ===== -->
-        <view class="quick-adjust">
-            <view class="qa-group">
-                <view class="qa-btn" @click.stop="adjustBpm(-1)">−</view>
-                <text class="qa-label">微调</text>
-                <view class="qa-btn" @click.stop="adjustBpm(1)">+</view>
+        <!-- ===== 自定义节奏(高级折叠区) ===== -->
+        <view v-if="customExpanded" class="custom-panel">
+            <view class="custom-warn">
+                <text class="warn-dot">●</text>
+                <text class="warn-text">前台模式 · 切后台会暂停</text>
             </view>
-            <view class="qa-divider" />
-            <view class="qa-group">
-                <view
-                    v-for="m in METER_OPTIONS"
-                    :key="m.value"
-                    class="qa-meter"
-                    :class="{ active: accentEvery === m.value }"
-                    @click.stop="onMeterChange(m.value)"
-                >
-                    {{ m.label }}
+
+            <!-- BPM 微调 -->
+            <view class="row">
+                <text class="row-label">BPM</text>
+                <view class="bpm-stepper">
+                    <view class="step-btn" @click="onBpmDelta(-5)">−5</view>
+                    <view class="step-btn" @click="onBpmDelta(-1)">−1</view>
+                    <view class="step-val">{{ customBpm }}</view>
+                    <view class="step-btn" @click="onBpmDelta(1)">+1</view>
+                    <view class="step-btn" @click="onBpmDelta(5)">+5</view>
                 </view>
-                <text class="qa-label">拍</text>
             </view>
+
+            <!-- 拍号 -->
+            <view class="row">
+                <text class="row-label">拍号</text>
+                <view class="meter-tabs">
+                    <view
+                        v-for="n in [2, 3, 4]"
+                        :key="n"
+                        class="meter-tab"
+                        :class="{ active: customAccent === n }"
+                        @click="onAccentSelect(n)"
+                    >{{ n }}/4</view>
+                </view>
+            </view>
+        </view>
+
+        <!-- 底部行:自定义入口 + 提示 -->
+        <view class="bottom-row">
+            <text class="bottom-link" @click="onToggleCustom">
+                {{ customExpanded ? '✕ 收起自定义' : '⚙ 自定义节奏' }}
+            </text>
+            <text class="bottom-hint" v-if="mode === 'preset'">🔒 锁屏可继续播放</text>
         </view>
     </view>
 </template>
@@ -89,6 +107,7 @@
 <script setup lang="ts">
 import { computed, onMounted, onUnmounted, ref, watch } from 'vue'
 import { onShow, onHide } from '@dcloudio/uni-app'
+import { useMetronomeBg, type LoopId } from '../hooks/useMetronomeBg'
 import { useMetronome } from '../hooks/useMetronome'
 
 /**
@@ -99,104 +118,148 @@ import { useMetronome } from '../hooks/useMetronome'
 const RUNNER_VIDEO_URL =
     'https://gz-1349751149.cos.ap-guangzhou.myqcloud.com/uploads/video/20260525/20260525164014ef89f8862.mp4'
 
-/**
- * 视频原速对应的 BPM 基准(参见 hooks 实现注释)
- * playback-rate 范围 [0.5, 2.0]
- */
+/** 视频原速对应的 BPM 基准, playback-rate 范围 [0.5, 2.0] */
 const VIDEO_BASE_BPM = 124
 
-/**
- * 推荐档位:覆盖大多数老人健走场景,一键切换 BPM + 拍号
- * 不在档位的中间数值用右下角微调即可
- */
-const PRESETS = [
-    {
-        id: 'slow',
-        icon: '🚶',
-        name: '慢走',
-        bpm: 80,
-        accent: 2,
-        desc: '热身 · 恢复',
-    },
-    {
-        id: 'normal',
-        icon: '🏃‍♀️',
-        name: '健走',
-        bpm: 110,
-        accent: 2,
-        desc: '日常 · 通勤',
-    },
-    {
-        id: 'brisk',
-        icon: '🏃',
-        name: '快走',
-        bpm: 130,
-        accent: 2,
-        desc: '提速 · 燃脂',
-    },
-] as const
+/* ============================================================
+ * 双引擎设计
+ * ------------------------------------------------------------
+ * - mode='preset': 用 BgAudio 播预合成 mp3,支持后台/锁屏(走路场景)
+ * - mode='custom': 用 InnerAudio 实时合成,支持任意 BPM/拍号,但仅前台
+ * - 切模式时停掉对侧引擎,避免双声道叠加
+ * ============================================================ */
+type Mode = 'preset' | 'custom'
+const mode = ref<Mode>('preset')
+const customExpanded = ref<boolean>(false)
 
-const METER_OPTIONS = [
-    { label: '2', value: 2 },
-    { label: '3', value: 3 },
-    { label: '4', value: 4 },
-]
+/* click-wood.mp3 (CDN), 木鱼质感的敲击音 */
+const CLICK_WOOD_URL =
+    'https://gz-1349751149.cos.ap-guangzhou.myqcloud.com/uploads/file/20260526/202605261051282a0a94508.mp3'
 
-const metronome = useMetronome({
-    initialBpm: 80,
-    accentEvery: 4,
-    clickSrc: '/training/static/audio/click.mp3',
-    accentSrc: '/training/static/audio/click-wood.mp3',
+const bg = useMetronomeBg()
+const fg = useMetronome({
+    initialBpm: 100,
+    accentEvery: 2,
+    clickSrc: CLICK_WOOD_URL,
+    accentSrc: CLICK_WOOD_URL,
+    poolSize: 4,
 })
-const {
-    bpm,
-    isPlaying,
-    isAccent,
-    accentEvery,
-    intervalMs,
-    start,
-    stop,
-    setBpm,
-    setAccentEvery,
-    preload,
-} = metronome
 
-const adjustBpm = (delta: number) => {
-    setBpm(bpm.value + delta)
-}
+const { LOOP_PRESETS } = bg
+const currentLoop = bg.currentLoop
 
-const onMeterChange = (val: number) => {
-    setAccentEvery(val)
-}
+const customBpm = computed(() => fg.bpm.value)
+const customAccent = computed(() => fg.accentEvery.value)
 
-const togglePlay = () => {
-    if (isPlaying.value) {
-        stop()
-        uni.setKeepScreenOn({ keepScreenOn: false })
+/* 统一对外暴露的 isPlaying / currentBpm,根据 mode 选择信号源 */
+const isPlaying = computed(() =>
+    mode.value === 'preset' ? bg.isPlaying.value : fg.isPlaying.value,
+)
+
+const currentBpm = computed(() => {
+    if (mode.value === 'preset') {
+        const p = LOOP_PRESETS.find((p) => p.id === currentLoop.value)
+        return p?.bpm ?? 110
+    }
+    return fg.bpm.value
+})
+
+const intervalMs = computed(() => 60000 / currentBpm.value)
+
+/* ============================================================
+ * 档位元数据
+ * ============================================================ */
+const presetIcon = (id: LoopId) =>
+    id === 'slow' ? '🚶' : id === 'normal' ? '🏃‍♀️' : '🏃'
+const presetName = (id: LoopId) =>
+    id === 'slow' ? '慢走' : id === 'normal' ? '健走' : '快走'
+const presetDesc = (id: LoopId) =>
+    id === 'slow' ? '热身 · 恢复' : id === 'normal' ? '日常 · 通勤' : '提速 · 燃脂'
+
+/* ============================================================
+ * 中央圆按钮:在两个模式下分别工作
+ * ============================================================ */
+const onCenterTap = () => {
+    if (mode.value === 'preset') {
+        if (!currentLoop.value) {
+            bg.playLoop('normal')
+            uni.setKeepScreenOn({ keepScreenOn: true })
+            return
+        }
+        if (bg.isPlaying.value) {
+            bg.pause()
+            uni.setKeepScreenOn({ keepScreenOn: false })
+        } else {
+            bg.resume()
+            uni.setKeepScreenOn({ keepScreenOn: true })
+        }
     } else {
-        start()
-        uni.setKeepScreenOn({ keepScreenOn: true })
+        /* custom 模式 */
+        if (fg.isPlaying.value) {
+            fg.stop()
+            uni.setKeepScreenOn({ keepScreenOn: false })
+        } else {
+            fg.start()
+            uni.setKeepScreenOn({ keepScreenOn: true })
+        }
     }
 }
 
-/* 当前命中的档位(BPM + 拍号都匹配才算选中) */
-const activePreset = computed(() => {
-    const hit = PRESETS.find(
-        (p) => p.bpm === bpm.value && p.accent === accentEvery.value,
-    )
-    return hit?.id ?? null
-})
-
-const applyPreset = (p: (typeof PRESETS)[number]) => {
-    setBpm(p.bpm)
-    setAccentEvery(p.accent)
+/* ============================================================
+ * 档位卡片:点了 → 切回 preset 模式 + 停掉 custom
+ * ============================================================ */
+const onPresetTap = (id: LoopId) => {
+    if (mode.value === 'custom') {
+        fg.stop()
+        mode.value = 'preset'
+        customExpanded.value = false
+    }
+    bg.playLoop(id)
+    uni.setKeepScreenOn({ keepScreenOn: true })
 }
 
-/* 视频实例与 BPM 同步 */
+/* ============================================================
+ * 自定义折叠区切换
+ * ============================================================ */
+const onToggleCustom = () => {
+    if (!customExpanded.value) {
+        /* 展开:进入 custom 模式 + 停掉 preset */
+        if (bg.isPlaying.value || currentLoop.value) {
+            bg.stop()
+        }
+        mode.value = 'custom'
+        /* 把当前显示 BPM 带过去当起始值 */
+        const seed =
+            LOOP_PRESETS.find((p) => p.id === (currentLoop.value ?? 'normal'))?.bpm ?? 100
+        fg.setBpm(seed)
+        fg.setAccentEvery(2)
+        /* 立即预热 InnerAudio,避免首拍冷启动延迟 */
+        fg.preload()
+        customExpanded.value = true
+    } else {
+        /* 收起:回到 preset,停掉 fg */
+        fg.stop()
+        mode.value = 'preset'
+        customExpanded.value = false
+        uni.setKeepScreenOn({ keepScreenOn: false })
+    }
+}
+
+const onBpmDelta = (delta: number) => {
+    fg.setBpm(fg.bpm.value + delta)
+}
+
+const onAccentSelect = (n: number) => {
+    fg.setAccentEvery(n)
+}
+
+/* ============================================================
+ * 视频实例与 BPM 同步
+ * ============================================================ */
 let videoCtx: UniApp.VideoContext | null = null
 
 const playbackRate = computed(() => {
-    const rate = bpm.value / VIDEO_BASE_BPM
+    const rate = currentBpm.value / VIDEO_BASE_BPM
     return Math.max(0.5, Math.min(2.0, +rate.toFixed(2)))
 })
 
@@ -207,11 +270,6 @@ onMounted(() => {
 
 const onVideoError = (e: any) => {
     console.error('[runner-video] error:', e?.detail || e)
-    uni.showToast({
-        title: '视频加载失败,请用真机预览',
-        icon: 'none',
-        duration: 2500,
-    })
 }
 
 const onVideoLoaded = (e: any) => {
@@ -237,21 +295,31 @@ watch(playbackRate, (rate) => {
 
 const rootStyle = computed(() => ({
     '--beat-duration': `${intervalMs.value}ms`,
-    '--step-duration': `${intervalMs.value}ms`,
 }))
 
 onShow(() => {
-    preload()
+    /* custom 模式回到前台时主动预加载,避免冷启动延迟 */
+    if (mode.value === 'custom') {
+        fg.preload()
+    }
 })
 
+/**
+ * onHide:差异化处理
+ *   - preset 模式: 不停,BgAudio 接管后台播放
+ *   - custom 模式: 立即停掉,InnerAudio 后台不工作,留着会被 iOS 挂起后状态错乱
+ */
 onHide(() => {
-    if (isPlaying.value) {
-        stop()
+    if (mode.value === 'custom') {
+        fg.stop()
         uni.setKeepScreenOn({ keepScreenOn: false })
     }
 })
 
 onUnmounted(() => {
+    /* 页面销毁时全部清理 */
+    if (mode.value === 'preset' && bg.isPlaying.value) bg.stop()
+    if (mode.value === 'custom') fg.stop()
     uni.setKeepScreenOn({ keepScreenOn: false })
 })
 </script>
@@ -269,28 +337,25 @@ $text-3: #94a3b8;
 $brand: #10b981;
 $brand-soft: #d1fae5;
 $brand-deep: #047857;
-$accent: #f59e0b;
-$accent-soft: #fef3c7;
+$warn: #f59e0b;
+$warn-soft: #fef3c7;
 $radius-card: 24rpx;
-$radius-btn: 18rpx;
 $shadow-sm: 0 4rpx 12rpx rgba(15, 23, 42, 0.04);
-$shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
 
 /* ============================================================
  * 页面容器
  * ============================================================ */
 .page {
     position: relative;
-    height: 100vh;
+    min-height: 100vh;
     box-sizing: border-box;
-    padding: 30rpx 28rpx 80rpx;
+    padding: 30rpx 28rpx 50rpx;
     background: $bg-color;
     display: flex;
     flex-direction: column;
     align-items: center;
-    gap: 22rpx;
+    gap: 20rpx;
     color: $text-1;
-    overflow: hidden;
 }
 
 /* ============================================================
@@ -300,7 +365,7 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
     position: relative;
     width: 480rpx;
     height: 480rpx;
-    margin-top: 16rpx;
+    margin-top: 12rpx;
     display: flex;
     align-items: center;
     justify-content: center;
@@ -358,14 +423,6 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
         animation: core-beat var(--beat-duration, 750ms) ease-in-out infinite;
     }
 
-    &.playing.accent {
-        background: linear-gradient(140deg, #fbbf24 0%, #d97706 100%);
-        box-shadow:
-            inset 0 -16rpx 50rpx rgba(0, 0, 0, 0.18),
-            inset 0 16rpx 50rpx rgba(255, 255, 255, 0.22),
-            0 16rpx 40rpx rgba(245, 158, 11, 0.4);
-    }
-
     .bpm-num {
         font-size: 168rpx;
         font-weight: 800;
@@ -427,23 +484,20 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
 }
 
 /* ============================================================
- * 跑步小人(无边框,跟白底融合)
+ * 跑步小人
  * ============================================================ */
 .walker {
     width: 100%;
-    height: 260rpx;
+    height: 240rpx;
     display: flex;
     justify-content: center;
     align-items: center;
 }
 
 .walker-box {
-    /* 1:1 矩形,跟 video 内容比例一致,消除左右黑边
-       background 设成 video 内容右上角的浅灰白色,
-       万一还有 1rpx 缝隙也不会出现刺眼黑边 */
     position: relative;
-    width: 260rpx;
-    height: 260rpx;
+    width: 240rpx;
+    height: 240rpx;
     background: #e8ecf2;
     border-radius: 24rpx;
     overflow: hidden;
@@ -453,14 +507,9 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
 .runner-video {
     width: 100%;
     height: 100%;
-    /* 微信 native video 自身默认是 #000 黑底,父容器 bg 在 web 看不到,
-       只能让 video 占满 + 让父 bg 跟 video 内容色融合 */
     background: #e8ecf2;
 }
 
-/* 覆盖在 video 右上角原生 PIP/小窗按钮上的色块
-   颜色取 video 内容右上角的浅灰白渐变(#dde2eb 左右),让色块融入视频画面
-   仅小程序端有效(cover-view 是小程序唯一能盖住 native 组件的元素) */
 .pip-mask {
     position: absolute;
     top: 0;
@@ -478,7 +527,7 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
 .presets {
     width: 100%;
     display: flex;
-    gap: 16rpx;
+    gap: 14rpx;
 }
 
 .preset {
@@ -486,33 +535,33 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
     background: $card-bg;
     border: 2rpx solid $card-border;
     border-radius: $radius-card;
-    padding: 22rpx 12rpx 20rpx;
+    padding: 18rpx 8rpx 16rpx;
     display: flex;
     flex-direction: column;
     align-items: center;
-    gap: 6rpx;
+    gap: 4rpx;
     box-shadow: $shadow-sm;
     transition: all 0.18s;
 
     .preset-icon {
-        font-size: 44rpx;
+        font-size: 40rpx;
         line-height: 1;
-        margin-bottom: 6rpx;
+        margin-bottom: 4rpx;
     }
     .preset-name {
-        font-size: 30rpx;
+        font-size: 28rpx;
         font-weight: 700;
         color: $text-1;
         letter-spacing: 2rpx;
     }
     .preset-bpm {
-        font-size: 24rpx;
+        font-size: 22rpx;
         color: $text-2;
         font-weight: 600;
         font-variant-numeric: tabular-nums;
     }
     .preset-desc {
-        font-size: 20rpx;
+        font-size: 18rpx;
         color: $text-3;
         letter-spacing: 1rpx;
         margin-top: 2rpx;
@@ -542,84 +591,145 @@ $shadow-md: 0 12rpx 28rpx rgba(15, 23, 42, 0.08);
 }
 
 /* ============================================================
- * 右下角微调(不显眼)
+ * 自定义节奏面板(仅 customExpanded 时显示)
  * ============================================================ */
-.quick-adjust {
-    position: absolute;
-    right: 28rpx;
-    bottom: 22rpx;
+.custom-panel {
+    width: 100%;
+    background: $card-bg;
+    border: 2rpx solid rgba(245, 158, 11, 0.25);
+    border-radius: $radius-card;
+    box-shadow: 0 6rpx 18rpx rgba(245, 158, 11, 0.08);
+    padding: 20rpx 24rpx 22rpx;
+    display: flex;
+    flex-direction: column;
+    gap: 16rpx;
+}
+
+.custom-warn {
     display: flex;
     align-items: center;
-    gap: 14rpx;
-    padding: 10rpx 18rpx;
-    background: rgba(255, 255, 255, 0.7);
-    border: 1rpx solid rgba(15, 23, 42, 0.05);
-    border-radius: 999rpx;
-    backdrop-filter: blur(10rpx);
-    opacity: 0.7;
-    transition: opacity 0.2s;
+    gap: 8rpx;
+    margin-bottom: 4rpx;
 
-    &:active {
-        opacity: 1;
+    .warn-dot {
+        font-size: 18rpx;
+        color: $warn;
+    }
+    .warn-text {
+        font-size: 22rpx;
+        color: #b45309;
+        letter-spacing: 0.5rpx;
+        font-weight: 600;
     }
 }
 
-.qa-group {
+.row {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    gap: 12rpx;
+
+    .row-label {
+        font-size: 24rpx;
+        color: $text-2;
+        font-weight: 600;
+        letter-spacing: 1rpx;
+        flex-shrink: 0;
+        width: 70rpx;
+    }
+}
+
+.bpm-stepper {
     display: flex;
     align-items: center;
     gap: 6rpx;
-}
+    flex: 1;
+    justify-content: flex-end;
 
-.qa-label {
-    font-size: 20rpx;
-    color: $text-3;
-    margin: 0 4rpx;
-    letter-spacing: 1rpx;
-}
+    .step-btn {
+        min-width: 56rpx;
+        height: 52rpx;
+        line-height: 52rpx;
+        text-align: center;
+        font-size: 22rpx;
+        color: $text-2;
+        background: #f1f5f9;
+        border-radius: 10rpx;
+        font-weight: 600;
+        padding: 0 10rpx;
+        font-variant-numeric: tabular-nums;
 
-.qa-btn {
-    width: 40rpx;
-    height: 40rpx;
-    border-radius: 50%;
-    background: rgba(15, 23, 42, 0.05);
-    color: $text-2;
-    font-size: 26rpx;
-    font-weight: 700;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    line-height: 1;
-
-    &:active {
-        background: rgba(16, 185, 129, 0.18);
-        color: $brand-deep;
+        &:active {
+            background: #e2e8f0;
+            transform: scale(0.94);
+        }
+    }
+    .step-val {
+        min-width: 84rpx;
+        height: 52rpx;
+        line-height: 52rpx;
+        text-align: center;
+        font-size: 30rpx;
+        font-weight: 800;
+        color: $text-1;
+        font-variant-numeric: tabular-nums;
+        background: $warn-soft;
+        border-radius: 10rpx;
     }
 }
 
-.qa-meter {
-    min-width: 36rpx;
-    height: 36rpx;
-    padding: 0 10rpx;
-    border-radius: 999rpx;
+.meter-tabs {
+    display: flex;
+    gap: 8rpx;
+
+    .meter-tab {
+        height: 52rpx;
+        line-height: 52rpx;
+        padding: 0 18rpx;
+        font-size: 22rpx;
+        color: $text-2;
+        background: #f1f5f9;
+        border-radius: 10rpx;
+        font-weight: 600;
+        letter-spacing: 1rpx;
+
+        &.active {
+            background: $warn;
+            color: #fff;
+            box-shadow: 0 4rpx 10rpx rgba(245, 158, 11, 0.3);
+        }
+        &:active {
+            transform: scale(0.94);
+        }
+    }
+}
+
+/* ============================================================
+ * 底部行(自定义入口 + 锁屏提示,横向排布)
+ * ============================================================ */
+.bottom-row {
+    width: 100%;
+    margin-top: 6rpx;
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 0 6rpx;
+}
+
+.bottom-link {
     font-size: 22rpx;
     color: $text-3;
-    font-weight: 600;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    line-height: 1;
-    transition: all 0.15s;
+    letter-spacing: 0.5rpx;
+    padding: 8rpx 4rpx;
 
-    &.active {
-        background: $brand;
-        color: #fff;
-        box-shadow: 0 2rpx 6rpx rgba(16, 185, 129, 0.4);
+    &:active {
+        color: $text-2;
     }
 }
 
-.qa-divider {
-    width: 1rpx;
-    height: 22rpx;
-    background: rgba(15, 23, 42, 0.08);
+.bottom-hint {
+    font-size: 22rpx;
+    color: $text-3;
+    letter-spacing: 0.5rpx;
 }
 </style>
diff --git a/TUICallKit-Vue3/training/static/README.md b/TUICallKit-Vue3/training/static/README.md
index 1c5442f4..c6a22f21 100644
--- a/TUICallKit-Vue3/training/static/README.md
+++ b/TUICallKit-Vue3/training/static/README.md
@@ -6,26 +6,16 @@
 
 ```
 training/static/
-├── audio/
-│   └── click.mp3              # 节拍器主音（短促金属敲击声，约 50ms）
-├── voice/
-│   ├── numbers/
-│   │   └── 1.mp3 ~ 30.mp3     # 数字报数
-│   └── prompts/
-│       ├── start.mp3
-│       ├── ready.mp3
-│       ├── rest.mp3
-│       ├── next-set.mp3
-│       ├── last-rep.mp3
-│       ├── keep-it-up.mp3
-│       ├── good-job.mp3
-│       ├── breathe-in.mp3
-│       └── breathe-out.mp3
-└── bgm/
-    ├── train-light.mp3         # 训练时背景乐（轻快有节奏感）
-    └── rest-meditation.mp3     # 休息时背景乐（舒缓冥想）
+├── audio/                      # 当前为空 —— 节拍器音频已全部迁移到 COS CDN
+├── voice/                      # (规划中) TTS 语音教练
+│   ├── numbers/                  数字报数 1~30
+│   └── prompts/                  开始/休息/再来 等口令
+├── bgm/                        # (规划中) 训练/休息背景乐
+└── footprint.svg               # 脚印图标(早期方案残留,可保留作为备用素材)
 ```
 
+> 节拍器音频已完全走 CDN（`gz-1349751149.cos.ap-guangzhou.myqcloud.com`），减少小程序包体积约 210 KB。`useMetronomeBg.ts` / `useMetronome.ts` 中的 URL 即源信息，更换音色只需改 hook 里的常量。
+
 ## 准备步骤
 
 ### 1. 语音素材（小米 MiMo TTS 自动生成）
@@ -63,21 +53,22 @@ node scripts/generate-voice.mjs --force
 - `苏打`：年轻男声，有力量感
 - `白桦`：成熟男声，沉稳
 
-### 2. 节拍器 click 音
+### 2. 节拍器 click / 循环音轨
 
-**已内置 3 种音色**（来自 [chrono-bump](https://github.com/johnnysn/chrono-bump) MIT 协议项目）：
+**全部托管在腾讯云 COS（2026-05-26 上传）**，本地不再保留：
 
-| 文件 | 用途 | 大小 |
-|------|------|------|
-| `audio/click.mp3` | 默认 click（标准节拍器音） | 3.4 KB |
-| `audio/click-soft.mp3` | 柔和音色 | 4.2 KB |
-| `audio/click-wood.mp3` | 木鱼/原木质感（推荐用于重音 accent） | 4.6 KB |
+| 用途 | 文件 | 大小 | 引擎 |
+|---|---|---|---|
+| 单拍 click（基础） | `click.mp3` | 3.4 KB | InnerAudio |
+| 单拍 click（木鱼，推荐） | `click-wood.mp3` | 4.6 KB | InnerAudio (custom 模式) |
+| 循环音轨 慢走 80 BPM | `loop_80bpm_2.mp3` | 71 KB | BgAudio (preset) |
+| 循环音轨 健走 110 BPM | `loop_110bpm_2.mp3` | 65 KB | BgAudio (preset) |
+| 循环音轨 快走 130 BPM | `loop_130bpm_2.mp3` | 66 KB | BgAudio (preset) |
 
-如果想换更好听的，可以去：
-- [freesound.org](https://freesound.org) 搜 "click" / "tick"（注意 CC 协议）
-- [pixabay.com/sound-effects](https://pixabay.com/sound-effects/) 搜 "metronome"（免费可商用）
+> 微信 `BackgroundAudioManager.src` 只接受 https URL,不支持包内资源,所以必须走 CDN。
+> COS 域名已加入小程序后台 `downloadFile 合法域名`,跑步视频也走同一域名。
 
-替换时保持文件名不变即可，无需改代码。
+更换音色：去 [pixabay.com/sound-effects](https://pixabay.com/sound-effects/) 找新素材 → 上传到 COS → 在 `useMetronomeBg.ts` / `useMetronome.ts` 里替换 URL 即可。
 
 ### 3. 背景音乐
 
@@ -92,9 +83,11 @@ node scripts/generate-voice.mjs --force
 
 ## 在代码里被引用的位置
 
-- `training/hooks/useMetronome.ts` → `audio/click.mp3`
-- `training/hooks/useVoiceCoach.ts` → `voice/numbers/*.mp3`、`voice/prompts/*.mp3`
-- `training/hooks/useTrainingBgm.ts` → `bgm/*.mp3`
+- `training/hooks/useMetronome.ts` → `DEFAULT_CLICK_SRC` (CDN: click.mp3)
+- `training/hooks/useMetronomeBg.ts` → `LOOP_PRESETS[*].src` (CDN: loop_*.mp3)
+- `training/pages/metronome.vue` → `CLICK_WOOD_URL` (CDN: click-wood.mp3, custom 模式)
+- `training/hooks/useVoiceCoach.ts` → `voice/numbers/*.mp3`、`voice/prompts/*.mp3` (规划中)
+- `training/hooks/useTrainingBgm.ts` → `bgm/*.mp3` (规划中)
 
 如需修改路径，修改对应 hook 文件里的常量即可。
 
@@ -103,3 +96,120 @@ node scripts/generate-voice.mjs --force
 - 微信小程序对单个文件大小有 10MB 上限，本目录所有文件加起来建议控制在 5MB 以内。
 - 小程序整包大小限制（主包 2MB / 总包 20MB），如果资源较大建议放 CDN 而非本地 static。
   - 把 `useVoiceCoach.ts` 里的 `VOICE_BASE` 改成 CDN URL 即可。
+
+---
+
+## 后台/锁屏播放设计备忘（未来健身模块用）
+
+> 节拍器目前用 `InnerAudioContext` + `requiredBackgroundModes:["audio"]` 已能覆盖 5~10 分钟健走场景。
+> 真要做长时间训练 BGM、锁屏控制条等高级能力，参考下面的 `BackgroundAudioManager` 方案。
+
+### 引擎选择对照表
+
+健身模块的音频天然分两类，配两套引擎不冲突：
+
+| 音频类型 | 时长 | 推荐引擎 | 理由 |
+|---|---|---|---|
+| 训练/休息 BGM | 30s~2min 循环 | **BackgroundAudioManager** | 长流、需要后台/锁屏不停 |
+| 语音教练（"开始/休息/再来"） | 1~3s 单句 | InnerAudioContext | 短促，前台用即可 |
+| 报数（1, 2, 3...） | 0.5~1s | InnerAudioContext + 池子 | 高频短促 |
+| 节拍器 click | 50~150ms | InnerAudioContext + 池子 | 极短，BgAudio 不接受 |
+
+**关键约束：BgAudio 是全局单例，一次只能播 1 个音频**。所以让它专门播 BGM 这类"长流"，其他短音用 InnerAudio 配合，互不打架。
+
+### BackgroundAudioManager 限制清单（踩坑预警）
+
+1. **全局单例**：整个小程序同一时刻只能播一个，多场景要协调切换
+2. **音频时长 ≥ 1 秒**：太短的 click 会被微信判定异常忽略
+3. **必填 metadata**：`title` / `coverImgUrl` / `singer` / `epname` / `webUrl` 缺一会报错
+4. **切 src 有延迟**：200~500ms 初始化抖动，频繁切换会卡顿
+5. **必须声明 `requiredBackgroundModes:["audio"]`** 才能后台播放
+6. **iOS 锁屏豁免**：声明后能锁屏继续播，无 5 分钟时长限制（vs InnerAudio 的 5min）
+7. **会显示系统控制条**：锁屏/通知栏出现带封面+暂停按钮的控制条
+
+### 推荐架构（健身模块上线时）
+
+```
+training/hooks/
+├── useTrainingBgm.ts    → BackgroundAudioManager (后台/锁屏继续放音乐)
+├── useVoiceCoach.ts     → InnerAudioContext     (语音指导,前台用)
+└── useMetronome.ts      → InnerAudioContext     (节拍器,池子方案,保持现状)
+```
+
+页面 `pages.json` 声明：
+
+```json
+{
+    "path": "pages/index",
+    "style": {
+        "navigationBarTitleText": "练一练",
+        "requiredBackgroundModes": ["audio"]
+    }
+}
+```
+
+锁屏会显示 BGM 控制条，老人能直接在锁屏点暂停。训练页面通过 `bgm.onPause()` 监听同步暂停训练，体验连贯。
+
+### 必备资产清单
+
+到时候要准备的文件：
+
+- **BGM 2 首**：`bgm/train-light.mp3`（训练）、`bgm/rest-meditation.mp3`（休息）
+  - 每个 30s~1min，128kbps 单声道，30~80KB
+  - 推荐来源：[pixabay.com/music](https://pixabay.com/music) 搜 "calm" / "meditation" / "lofi"
+- **锁屏封面**：`audio/cover.jpg` 200×200
+  - 简洁绿色背景 + 训练 emoji 即可
+
+### BackgroundAudioManager API 速查
+
+```ts
+const bgm = uni.getBackgroundAudioManager()
+
+/* 必填 metadata,缺一会报错 */
+bgm.title       = '健走训练中'
+bgm.coverImgUrl = '/training/static/audio/cover.jpg'
+bgm.epname      = '甄养堂'
+bgm.singer      = '健走节拍'
+bgm.webUrl      = ''   // 必填,空字符串可
+
+/* src 一旦赋值会自动播放 */
+bgm.src = '/training/static/audio/bgm/train-light.mp3'
+
+/* 控制 */
+bgm.pause()    // 暂停 (锁屏控制条仍在)
+bgm.play()     // 继续
+bgm.stop()     // 真停 + 隐藏控制条
+bgm.seek(30)   // 跳到 30s
+
+/* 事件监听 — 用户从锁屏点暂停时会触发 */
+bgm.onPause(() => { /* 同步训练 UI 状态 */ })
+bgm.onPlay(()  => {})
+bgm.onStop(()  => {})
+bgm.onEnded(() => { /* 不 loop 时触发,可手动接下一首 */ })
+bgm.onError((err) => { console.error(err) })
+```
+
+### 切换不同场景音乐的模式
+
+```ts
+function switchBgm(scene: 'training' | 'resting' | 'none') {
+    if (scene === 'none') {
+        bgm.stop()
+        return
+    }
+    bgm.title = scene === 'training' ? '健走训练中' : '休息恢复中'
+    bgm.src = scene === 'training'
+        ? '/training/static/audio/bgm/train-light.mp3'
+        : '/training/static/audio/bgm/rest-meditation.mp3'
+    /* 注:setSrc 会自动播放,有 200~500ms 切换延迟 */
+}
+```
+
+### 节拍器要不要也升级到 BgAudio?
+
+**目前不需要**。节拍器升级 BgAudio 的代价：
+- 需要预合成 3 个档位的循环 mp3（80/110/130 BPM × 2 拍）
+- 必须砍掉右下角微调按钮（预合成 mp3 改不了 BPM）
+- 切档位有 200~500ms 卡顿
+
+如果未来发现"健走 30 分钟以上锁屏会停"才考虑改。当前 5~10 分钟场景 InnerAudio + `requiredBackgroundModes` 够用。
diff --git a/TUICallKit-Vue3/training/static/audio/click-wood.mp3 b/TUICallKit-Vue3/training/static/audio/click-wood.mp3
deleted file mode 100644
index fb3fff34..00000000
Binary files a/TUICallKit-Vue3/training/static/audio/click-wood.mp3 and /dev/null differ
diff --git a/TUICallKit-Vue3/training/static/audio/click.mp3 b/TUICallKit-Vue3/training/static/audio/click.mp3
deleted file mode 100644
index faa1693a..00000000
Binary files a/TUICallKit-Vue3/training/static/audio/click.mp3 and /dev/null differ
diff --git a/server/config/project.php b/server/config/project.php
index 88b8505a..44b13891 100755
--- a/server/config/project.php
+++ b/server/config/project.php
@@ -80,7 +80,8 @@ return [
 
     //上传文件的格式 (文件)
     'file_file' => [
-        'zip','rar','txt','pdf','doc','docx','xls','xlsx','ppt','pptx','csv','txt','ftr','7z','gz'
+        'zip','rar','txt','pdf','doc','docx','xls','xlsx','ppt','pptx','csv','txt','ftr','7z','gz',
+        'mp3', 'wav', 'm4a', 'aac', 'amr', 'wma',  // 音频
     ],
 
     // 登录设置