diff --git a/frontend/App.vue b/frontend/App.vue
index 5877788..017478c 100644
--- a/frontend/App.vue
+++ b/frontend/App.vue
@@ -1,5 +1,9 @@
 <script>
 import { getGlobalSocket } from '@/utils/socket'
+import { emitAppReturnFromBackground } from '@/utils/backgroundRefreshBus.js'
+
+// 记录上次隐藏时间的 storage key
+const HIDE_TIME_KEY = 'app_last_hide_time'
 
 export default {
 	onLaunch: function() {
@@ -8,11 +12,14 @@ export default {
 	},
 	onShow: function() {
 		console.log('App Show')
+		this.handleBackgroundReturn()
 	},
 	onHide: function() {
 		console.log('App Hide')
 		// 关闭所有 WebSocket 连接
 		this.closeWebSocket()
+		// 记录切到后台的时间，用于 onShow 时判断是否"从后台返回"
+		uni.setStorageSync(HIDE_TIME_KEY, Date.now())
 	},
 	methods: {
 		initWebSocket() {
@@ -27,6 +34,20 @@ export default {
 			console.log('关闭全局 WebSocket 连接')
 			const globalSocket = getGlobalSocket()
 			globalSocket.closeAll()
+		},
+		/**
+		 * 处理"从后台切回前台"事件
+		 * 通过 storage 中的上次隐藏时间判断本次 onShow 是否由后台返回触发
+		 * 若是，则通知所有订阅了 useBackgroundRefresh 的页面执行刷新
+		 */
+		handleBackgroundReturn() {
+			const lastHide = uni.getStorageSync(HIDE_TIME_KEY) || 0
+			if (!lastHide) return
+			// 清理标记，避免下次普通 onShow（如首次启动）误触发
+			uni.removeStorageSync(HIDE_TIME_KEY)
+			// 时间异常保护
+			if (Date.now() - lastHide < 0) return
+			emitAppReturnFromBackground()
 		}
 	}
 }
diff --git a/frontend/composables/useBackgroundRefresh.js b/frontend/composables/useBackgroundRefresh.js
new file mode 100644
index 0000000..e9df80d
--- /dev/null
+++ b/frontend/composables/useBackgroundRefresh.js
@@ -0,0 +1,32 @@
+import { onMounted, onBeforeUnmount } from 'vue'
+import { onAppReturnFromBackground } from '@/utils/backgroundRefreshBus.js'
+
+/**
+ * 页面启用「从后台切回时自动刷新」能力
+ *
+ * 仅当 App 从后台切回前台时触发，不会因页面间普通跳转而触发。
+ * 由 App.vue 统一调度，页面只需关心自己的刷新逻辑。
+ *
+ * @param {Function} refreshFn 刷新逻辑（通常就是重新拉数据的函数）
+ *
+ * @example
+ *   // 在 <script setup> 中：
+ *   useBackgroundRefresh(() => {
+ *     fetchList()
+ *   })
+ */
+export function useBackgroundRefresh(refreshFn) {
+	if (typeof refreshFn !== 'function') {
+		throw new Error('useBackgroundRefresh: refreshFn must be a function')
+	}
+
+	let unregister = null
+
+	onMounted(() => {
+		unregister = onAppReturnFromBackground(refreshFn)
+	})
+
+	onBeforeUnmount(() => {
+		if (typeof unregister === 'function') unregister()
+	})
+}
diff --git a/frontend/pages/components/Header.vue b/frontend/pages/components/Header.vue
index 7452162..f20bab9 100644
--- a/frontend/pages/components/Header.vue
+++ b/frontend/pages/components/Header.vue
@@ -143,6 +143,7 @@ import Avatar from "./Avatar.vue";
 import DailyTasks from "@/pages/tasks/daily-tasks.vue";
 import GuideModal from "@/pages/tasks/GuideModal.vue";
 import { useBanner } from "@/pages/square/composables/useBanner.js";
+import { useBackgroundRefresh } from "@/composables/useBackgroundRefresh.js";
 import { reportEvent } from "@/utils/task-api.js";
 import { getEarningsSummaryApi } from "@/utils/api.js";
 
@@ -333,6 +334,11 @@ onShow(() => {
   loadEarningsSummary();
 });
 
+// App 从后台切回前台时，刷新 banner 活动（onShow 已经在做收益刷新，这里不重复）
+useBackgroundRefresh(() => {
+  loadBannerActivities();
+});
+
 // 组件卸载时移除事件监听
 onUnmounted(() => {
   uni.$off("avatarUpdated", handleAvatarUpdate);
diff --git a/frontend/pages/square/components/StarGalaxy/index.vue b/frontend/pages/square/components/StarGalaxy/index.vue
index b42edf4..5a32b33 100644
--- a/frontend/pages/square/components/StarGalaxy/index.vue
+++ b/frontend/pages/square/components/StarGalaxy/index.vue
@@ -59,6 +59,7 @@ import ScatteredRanks from "./ScatteredRanks.vue";
 import { generateRingPositions } from "./config.js";
 import { getHotRankingApi } from "@/utils/api.js";
 import { getAssetCoverRealUrl } from "@/utils/assetImageHelper.js";
+import { useBackgroundRefresh } from "@/composables/useBackgroundRefresh.js";
 
 const emit = defineEmits(["cardClick"]);
 
@@ -108,6 +109,11 @@ onMounted(() => {
   loadData();
 });
 
+// App 从后台切回前台时刷新星河榜单
+useBackgroundRefresh(() => {
+  loadData();
+});
+
 onUnmounted(() => {
   // 清理（如有 timer）
 });
diff --git a/frontend/pages/square/composables/useBanner.js b/frontend/pages/square/composables/useBanner.js
index 5483200..403c105 100644
--- a/frontend/pages/square/composables/useBanner.js
+++ b/frontend/pages/square/composables/useBanner.js
@@ -11,32 +11,40 @@ const FALLBACK_BANNER = [
   }
 ]
 
-export function useBanner() {
-  // 旧的活动 banner(square 顶部)
-  const bannerActivities = ref([])
+/**
+ * 模块级共享状态（单例）
+ *
+ * 背景：square.vue 和 pages/components/Header.vue 都会调 useBanner()，
+ *       旧实现每次调用都 new ref，导致两个组件各持一份独立的 bannerActivities，
+ *       状态可能不一致。
+ *
+ * 改单例后：所有调用 useBanner() 的地方拿到的是同一对 ref，
+ *          任一处调 loadBannerActivities() / loadBanners() 都会同步刷新所有订阅者。
+ *
+ * 不会把数据搬到 Vuex，原因是 banner 数据目前只有这两个使用方，没必要全局 store 化。
+ */
+const bannerActivities = ref([])
+const banners = ref([])
 
-  // 新的运营 banner(铸造活动)
-  const banners = ref([])
+const loadBannerActivities = async () => {
+  try {
+    const starId = uni.getStorageSync('star_id') || null
+    const res = await getActivityListApi(starId, 1, 10)
 
-  const loadBannerActivities = async () => {
-    try {
-      const starId = uni.getStorageSync('star_id') || null
-      const res = await getActivityListApi(starId, 1, 10)
-
-      if (res.code === 0 && res.data?.activities) {
-        const activities = res.data.activities
-        // 过滤掉已过期的活动
-        bannerActivities.value = activities.filter(item => item.status !== 'expired')
-      }
-    } catch (e) {
-      console.error('[useBanner] 加载 banner 活动失败', e?.message ?? e)
+    if (res.code === 0 && res.data?.activities) {
+      const activities = res.data.activities
+      // 过滤掉已过期的活动
+      bannerActivities.value = activities.filter(item => item.status !== 'expired')
     }
+  } catch (e) {
+    console.error('[useBanner] 加载 banner 活动失败', e?.message ?? e)
   }
+}
 
-  // 加载运营 banner(铸造活动)
-  const loadBanners = async () => {
-    try {
-      const res = await getMintingActivitiesApi(null, 1, 10)
+// 加载运营 banner(铸造活动)
+const loadBanners = async () => {
+  try {
+    const res = await getMintingActivitiesApi(null, 1, 10)
 
       if (res.code === 0 && res.data?.activities) {
         // 将后端数据映射为 BannerCarousel 约定的字段
@@ -53,16 +61,18 @@ export function useBanner() {
         }))
       }
 
-      // 无数据兜底
-      if (banners.value.length === 0) {
-        banners.value = [...FALLBACK_BANNER]
-      }
-    } catch (e) {
-      console.error('[useBanner] 加载运营 banner 失败', e?.message ?? e)
+    // 无数据兜底
+    if (banners.value.length === 0) {
       banners.value = [...FALLBACK_BANNER]
     }
+  } catch (e) {
+    console.error('[useBanner] 加载运营 banner 失败', e?.message ?? e)
+    banners.value = [...FALLBACK_BANNER]
   }
+}
 
+export function useBanner() {
+  // 返回模块级单例的引用（API 不变，调用方零改动）
   return {
     bannerActivities,
     banners,
diff --git a/frontend/pages/square/square.vue b/frontend/pages/square/square.vue
index 334122a..c178cf9 100644
--- a/frontend/pages/square/square.vue
+++ b/frontend/pages/square/square.vue
@@ -107,6 +107,7 @@ import CreationGrid from "./components/CreationGrid.vue";
 import StarGalaxy from "./components/StarGalaxy/index.vue";
 // import { clearSubStepProgress, shouldShowGuideStartModal } from '@/utils/guideConfig.js'
 import { useBanner } from "./composables/useBanner.js";
+import { useBackgroundRefresh } from "@/composables/useBackgroundRefresh.js";
 import { doubleTapLike } from "@/utils/likeHelper.js";
 
 // ========== Store & User Info ==========
@@ -268,6 +269,16 @@ onShow(() => {
   activeContentTab.value = "xinghe";
 });
 
+// ========== 后台切回自动刷新 ==========
+// App 从后台切回前台时，刷新 banner 数据。
+// 三个 Tab 内容区中：
+//   - StarGalaxy：默认 Tab 且 v-if 命中后会保持挂载，需要在 StarGalaxy 内部独立接入 useBackgroundRefresh
+//   - HotCategoryBlock / CreationGrid：onShow 会切回 xinghe，自身被 v-if 卸载后再切回时重新挂载即重新拉数据
+useBackgroundRefresh(() => {
+  loadBannerActivities();
+  loadBanners();
+});
+
 // onLoad((options) => {
 //   if (options && 'guide_debug' in options) {
 //     const debugValue = options.guide_debug
diff --git a/frontend/static/rank/jindut-2.png b/frontend/static/rank/jindut-2.png
new file mode 100644
index 0000000..a848436
Binary files /dev/null and b/frontend/static/rank/jindut-2.png differ
diff --git a/frontend/static/rank/jindut.png b/frontend/static/rank/jindut.png
new file mode 100644
index 0000000..aab08b8
Binary files /dev/null and b/frontend/static/rank/jindut.png differ
diff --git a/frontend/utils/backgroundRefreshBus.js b/frontend/utils/backgroundRefreshBus.js
new file mode 100644
index 0000000..c0c6383
--- /dev/null
+++ b/frontend/utils/backgroundRefreshBus.js
@@ -0,0 +1,45 @@
+/**
+ * 后台返回事件总线
+ *
+ * 触发方：App.vue 在 onShow 中检测到"从后台切回前台"时调用
+ *         emitAppReturnFromBackground()
+ * 订阅方：页面通过 composables/useBackgroundRefresh.js 注册回调
+ *
+ * 为什么不用 uni.$emit / uni.$on：
+ *   1. 事件名是字符串，缺乏约束，容易和其他业务事件撞名
+ *   2. 集中在一处便于后续加日志、节流、灰度等横切逻辑
+ */
+
+const listeners = new Set()
+
+/**
+ * 注册后台返回监听
+ * @param {Function} fn 回调函数
+ * @returns {Function} 取消监听的函数
+ */
+export function onAppReturnFromBackground(fn) {
+	if (typeof fn !== 'function') return () => {}
+	listeners.add(fn)
+	return () => listeners.delete(fn)
+}
+
+/**
+ * 触发后台返回事件，通知所有订阅者
+ */
+export function emitAppReturnFromBackground() {
+	listeners.forEach(fn => {
+		try {
+			fn()
+		} catch (e) {
+			// 单个监听者异常不影响其他监听者
+			console.error('[backgroundRefreshBus] listener error:', e)
+		}
+	})
+}
+
+/**
+ * 清空所有监听（仅用于测试或强制重置）
+ */
+export function clearAppReturnFromBackgroundListeners() {
+	listeners.clear()
+}