diff --git a/frontend/components.d.ts b/frontend/components.d.ts
index 0023a2f..dcc77e4 100644
--- a/frontend/components.d.ts
+++ b/frontend/components.d.ts
@@ -61,6 +61,7 @@ declare module 'vue' {
     ElTimelineItem: typeof import('element-plus/es')['ElTimelineItem']
     ElTimePicker: typeof import('element-plus/es')['ElTimePicker']
     ElTooltip: typeof import('element-plus/es')['ElTooltip']
+    InAppBrowserPrompt: typeof import('./src/components/InAppBrowserPrompt.vue')['default']
     MobileBottomNav: typeof import('./src/components/MobileBottomNav.vue')['default']
     RouterLink: typeof import('vue-router')['RouterLink']
     RouterView: typeof import('vue-router')['RouterView']
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index ae39aad..ac9db45 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -3,6 +3,7 @@ import { RouterView } from 'vue-router'
 import { computed } from 'vue'
 import { useRoute } from 'vue-router'
 
+import InAppBrowserPrompt from './components/InAppBrowserPrompt.vue'
 import AdminLayout from './layouts/AdminLayout.vue'
 import AppLayout from './layouts/AppLayout.vue'
 
@@ -24,4 +25,5 @@ const layout = computed(() => {
   <AppLayout v-else>
     <RouterView />
   </AppLayout>
+  <InAppBrowserPrompt />
 </template>
diff --git a/frontend/src/components/InAppBrowserPrompt.vue b/frontend/src/components/InAppBrowserPrompt.vue
new file mode 100644
index 0000000..65b632b
--- /dev/null
+++ b/frontend/src/components/InAppBrowserPrompt.vue
@@ -0,0 +1,197 @@
+<script setup lang="ts">
+import { onMounted, ref } from 'vue'
+
+const promptStorageKey = 'hfb_in_app_browser_prompt_seen'
+const visible = ref(false)
+const browserName = ref('')
+
+function detectInAppBrowser(userAgent: string) {
+  const ua = userAgent.toLowerCase()
+  if (ua.includes('micromessenger')) return 'wechat'
+  if (/\bqq\//i.test(userAgent) || ua.includes('mqqbrowser')) return 'qq'
+  return ''
+}
+
+function storageGet(key: string) {
+  try {
+    return window.sessionStorage.getItem(key)
+  } catch {
+    return null
+  }
+}
+
+function storageSet(key: string, value: string) {
+  try {
+    window.sessionStorage.setItem(key, value)
+  } catch {
+    // sessionStorage 不可用时只影响“本次会话只提醒一次”，不阻断页面使用。
+  }
+}
+
+function closePrompt() {
+  storageSet(promptStorageKey, '1')
+  visible.value = false
+}
+
+onMounted(() => {
+  const browser = detectInAppBrowser(window.navigator.userAgent)
+  if (!browser || storageGet(promptStorageKey) === '1') return
+  browserName.value = browser === 'wechat' ? '微信' : 'QQ'
+  visible.value = true
+})
+</script>
+
+<template>
+  <Teleport to="body">
+    <div v-if="visible" class="in-app-browser-mask" role="presentation">
+      <section
+        class="in-app-browser-dialog"
+        role="dialog"
+        aria-modal="true"
+        aria-labelledby="in-app-browser-title"
+      >
+        <div class="prompt-icon" aria-hidden="true">
+          <van-icon name="guide-o" :size="30" />
+        </div>
+        <div class="prompt-copy">
+          <p class="prompt-kicker">当前为{{ browserName }}内置浏览器</p>
+          <h2 id="in-app-browser-title">建议在系统浏览器打开</h2>
+          <p class="prompt-desc">部分支付、跳转和上传能力在内置浏览器里可能受限。</p>
+          <div class="prompt-tip">
+            <span class="prompt-tip-line">点击右上角 <strong>···</strong></span>
+            <span>选择“在浏览器打开”</span>
+          </div>
+        </div>
+        <button class="prompt-action" type="button" @click="closePrompt">我知道了</button>
+      </section>
+    </div>
+  </Teleport>
+</template>
+
+<style scoped>
+.in-app-browser-mask {
+  position: fixed;
+  inset: 0;
+  z-index: 10000;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 24px;
+  background: rgb(15 23 42 / 48%);
+  backdrop-filter: blur(1.5px);
+}
+
+.in-app-browser-dialog {
+  width: min(78vw, 320px);
+  min-width: 250px;
+  overflow: hidden;
+  border: 1px solid rgb(255 255 255 / 68%);
+  border-radius: 18px;
+  background: #fff;
+  box-shadow: 0 18px 48px rgb(15 23 42 / 24%);
+  color: #1f2937;
+  text-align: center;
+}
+
+.prompt-icon {
+  display: grid;
+  width: 50px;
+  height: 50px;
+  margin: 22px auto 12px;
+  place-items: center;
+  border-radius: 16px;
+  background: linear-gradient(135deg, #fff4ec, #ffe1d0);
+  color: #d85b12;
+}
+
+.prompt-copy {
+  padding: 0 22px;
+}
+
+.prompt-kicker {
+  margin: 0;
+  color: #d85b12;
+  font-size: 12px;
+  font-weight: 700;
+  line-height: 1.4;
+}
+
+.in-app-browser-dialog h2 {
+  margin: 6px 0 0;
+  font-size: 18px;
+  font-weight: 800;
+  line-height: 1.4;
+}
+
+.prompt-desc {
+  margin: 9px 0 0;
+  color: #6b7280;
+  font-size: 13px;
+  line-height: 1.55;
+}
+
+.prompt-tip {
+  display: inline-flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 3px;
+  max-width: 100%;
+  margin: 14px 0 18px;
+  padding: 8px 13px;
+  border-radius: 12px;
+  background: #f6f8fb;
+  color: #4b5563;
+  font-size: 12px;
+  line-height: 1.35;
+}
+
+.prompt-tip strong {
+  display: inline-block;
+  color: #111827;
+  font-size: 15px;
+  letter-spacing: 1px;
+  line-height: 1;
+  transform: translateY(-1px);
+}
+
+.prompt-tip-line {
+  display: inline-flex;
+  align-items: center;
+  gap: 5px;
+}
+
+.prompt-action {
+  width: 100%;
+  min-height: 48px;
+  border: 0;
+  background: linear-gradient(135deg, #ff7a1a, #ef5b00);
+  color: #fff;
+  font: inherit;
+  font-size: 15px;
+  font-weight: 700;
+  cursor: pointer;
+}
+
+.prompt-action:active {
+  filter: brightness(0.96);
+}
+
+@media (max-width: 360px) {
+  .in-app-browser-mask {
+    padding: 18px;
+  }
+
+  .in-app-browser-dialog {
+    width: calc(100vw - 36px);
+    min-width: 0;
+  }
+
+  .prompt-copy {
+    padding: 0 20px;
+  }
+
+  .prompt-tip {
+    width: 100%;
+  }
+}
+</style>