diff --git a/src/main/resources/views/platform/zhghh5/activity/trainSignUp/apply/index.html b/src/main/resources/views/platform/zhghh5/activity/trainSignUp/apply/index.html
index eefe286..f8a391f 100644
--- a/src/main/resources/views/platform/zhghh5/activity/trainSignUp/apply/index.html
+++ b/src/main/resources/views/platform/zhghh5/activity/trainSignUp/apply/index.html
@@ -10,13 +10,48 @@ layout("/layouts/platform_h5.html"){
         box-shadow: 0 8px 12px #ebedf0;
         text-align: center !important;
     }
-    .info-container {
-        margin-bottom: 60px;
+    .activity-info-sheet {
+        height: 90vh;
+        height: 90dvh;
+        max-height: 90vh;
+        max-height: 90dvh;
     }
-    .button {
-        position: fixed;
-        bottom: 0;
+    .activity-info-sheet .van-action-sheet__content {
+        display: flex;
+        min-height: 0;
+        overflow: hidden;
+    }
+    .activity-info-sheet .info-container {
+        display: flex;
+        flex: 1;
+        min-width: 0;
+        min-height: 0;
+        flex-direction: column;
+    }
+    .activity-info-sheet .info-body {
+        flex: 1;
+        min-height: 0;
+        overflow-y: auto;
+        -webkit-overflow-scrolling: touch;
+    }
+    /* PDF内部使用百分比高度，必须提供明确的预览高度；外层正文仍可滚动查看封面和全文。 */
+    .activity-info-sheet .info-preview {
+        height: 60vh;
+        height: 60dvh;
+        min-height: 260px;
+    }
+    .activity-info-sheet .info-preview > div {
+        height: 100%;
+    }
+    .activity-info-sheet .info-preview .content img {
+        max-width: 100%;
+        height: auto;
+    }
+    .activity-info-sheet .button {
+        flex-shrink: 0;
         width: 100%;
+        padding-bottom: env(safe-area-inset-bottom);
+        background: #fff;
     }
     .info-img {
         display: block;
@@ -27,7 +62,7 @@ layout("/layouts/platform_h5.html"){
 </style>
 
 <div id="app">
-    <van-nav-bar title="品牌活动" left-text="返回" left-arrow @click-left="historyBack" fixed placeholder></van-nav-bar>
+    <van-nav-bar title="品牌活动" left-text="返回" left-arrow @click-left="onNavBack" fixed placeholder></van-nav-bar>
 
     <van-sticky offset-top="46px">
         <van-dropdown-menu :close-on-click-outside="false" :close-on-click-overlay="false">
@@ -67,13 +102,14 @@ layout("/layouts/platform_h5.html"){
         </template>
     </table-list>
 
-    <van-action-sheet :close-on-click-overlay="false" title="详细信息" v-model="infoVisible">
+    <van-action-sheet class="activity-info-sheet" :close-on-click-overlay="false" title="详细信息"
+                      :value="infoVisible" @input="visible => { if (!visible) closeInfo() }">
 
         <div class="info-container">
-            <div>
-                <van-image class="info-img" height="186" width="100%" :src="infoRow.cover"></van-image>
+            <div class="info-body">
+                <van-image class="info-img" height="124" width="100%" :src="infoRow.cover"></van-image>
                 <div class="info-title">{{infoRow.activityName}}</div>
-                <pdf-preview :content="infoRow.introduce"></pdf-preview>
+                <div class="info-preview"><pdf-preview :content="infoRow.introduce"></pdf-preview></div>
             </div>
             <div class="button">
                 <van-button @click="onApply(infoRow)" type="primary" block>
@@ -82,7 +118,7 @@ layout("/layouts/platform_h5.html"){
                     </span>
                     <template v-else>
                         距离开始
-                        <van-count-down :time="Math.abs(time)" class="count-down" format="DD 天 HH 时 mm 分 ss 秒" @finish="time = 0"></van-count-down>
+                        <van-count-down :time="Math.abs(time)" class="count-down" format="DD 天 HH 时 mm 分 ss 秒" @finish="this.$set(this, 'time', 0)"></van-count-down>
                     </template>
                 </van-button>
             </div>
@@ -100,6 +136,9 @@ layout("/layouts/platform_h5.html"){
         },
         data() {
             return {
+                popupOwnerId: 'train-activity-info-' + Date.now(),
+                infoClosing: false,
+                pageDisposed: false,
                 time: 0,
                 pageForm: {
                     pageNumber: 1,
@@ -116,35 +155,45 @@ layout("/layouts/platform_h5.html"){
                 ],
                 infoVisible: false,
                 infoRow: {},
-
-                id: GetQueryString('id')
             }
         },
         methods: {
             onView(row) {
-                this.infoRow = row
-                this.time = this.$moment().diff(this.$moment(row.activitySignUpStartTime), 'milliseconds')
-                this.infoVisible = true
+                if (this.pageDisposed || this.infoClosing) return
+                // 详情只由列表中的“查看介绍”点击打开，不根据链接参数或报名操作自动打开。
+                this.$set(this, 'infoRow', row)
+                this.$set(this, 'time', this.$moment().diff(this.$moment(row.activitySignUpStartTime), 'milliseconds'))
+                this.$set(this, 'infoVisible', true)
+                // 重复查看仅更新内容，不重复压入历史；关闭和系统返回统一交给全局栈。
+                window.mobilePopupHistory.open(this.popupOwnerId, 'info')
+            },
+            closeInfo() {
+                if (!this.infoVisible || this.infoClosing) return
+                // 回退为异步操作：立即隐藏并锁定本次关闭，防止连点产生多次历史回退。
+                this.$set(this, 'infoClosing', true)
+                this.$set(this, 'infoVisible', false)
+                window.mobilePopupHistory.close(this.popupOwnerId, 'info')
+            },
+            onInfoHistoryClose() {
+                // 系统返回和关闭按钮共用回调，关闭后允许用户再次主动查看。
+                this.$set(this, 'infoVisible', false)
+                this.$set(this, 'infoClosing', false)
+            },
+            onNavBack() {
+                if (window.mobilePopupHistory.hasOpen(this.popupOwnerId)) this.closeInfo()
+                else historyBack()
             },
             onApply(row) {
                 if(this.$moment().isBefore(this.$moment(row.activitySignUpStartTime))) {
-                    this.onView(row)
+                    this.$toast('报名尚未开始')
                     return
                 }
+                window.mobilePopupHistory.clear(this.popupOwnerId)
                 this.$pjaxReplace('/platform/trainSignUp/apply/list/h5?id=' + row.id)
             },
-            fetchOne() {
-                this.$axios.post('/platform/trainSignUp/manage/findOne', {id: this.id}).then((res) => {
-                    if(res.code === 0) {
-                        this.onView(res.data)
-                    }
-                })
-            },
             onReady() {
+                // 首次进入和组件重新就绪都只加载列表，不触发详情弹窗。
                 this.doSearch()
-                if(this.id) {
-                    this.fetchOne()
-                }
             },
             doSearch() {
                 this.$nextTick(() => {
@@ -154,8 +203,12 @@ layout("/layouts/platform_h5.html"){
                 })
             }
         },
-        mounted() {
-
+        created() {
+            window.mobilePopupHistory.register(this.popupOwnerId, () => this.onInfoHistoryClose())
+        },
+        beforeDestroy() {
+            this.$set(this, 'pageDisposed', true)
+            window.mobilePopupHistory.unregister(this.popupOwnerId)
         }
     })
 </script>