diff --git a/src/main/resources/views/platform/zhghh5/dayofficework/qsv/survey/index.html b/src/main/resources/views/platform/zhghh5/dayofficework/qsv/survey/index.html
index 4b26b0c..b9b9bfe 100644
--- a/src/main/resources/views/platform/zhghh5/dayofficework/qsv/survey/index.html
+++ b/src/main/resources/views/platform/zhghh5/dayofficework/qsv/survey/index.html
@@ -83,8 +83,12 @@ layout("/layouts/platform_h5.html"){
 </style>
 
 <div id="app" v-cloak>
-    <van-nav-bar title="问卷调查" left-arrow @click-left="historyBack" placeholder fixed></van-nav-bar>
-    <div class="container" :style="{'padding-bottom': answerRecord.isFinish ? 0 : '84px'}">
+    <van-nav-bar title="问卷调查" left-arrow @click-left="onBack" placeholder fixed></van-nav-bar>
+    <van-loading v-if="tableLoading" vertical style="padding: 40px 0">正在加载问卷</van-loading>
+    <van-empty v-else-if="loadError" :description="loadError">
+        <van-button type="primary" @click="onBack">返回首页</van-button>
+    </van-empty>
+    <div v-else-if="surveyReady" class="container" :style="{'padding-bottom': answerRecord.isFinish ? 0 : '84px'}">
         <h2 class="title">{{ activity.title }}</h2>
         <div v-if="!isFinished">
             <div v-for="(subject, index) in visibleSubjects" :key="subject.id" class="subject">
@@ -149,7 +153,10 @@ layout("/layouts/platform_h5.html"){
                 remainingTime: 0,
                 isFinished: false,
                 answerRecord: {},
-                answerRecordId: null
+                answerRecordId: null,
+                tableLoading: false,
+                surveyReady: false,
+                loadError: ""
             }
         },
 
@@ -173,29 +180,69 @@ layout("/layouts/platform_h5.html"){
         },
 
         methods: {
-            //获取活动、题目
-            listSubjects() {
-                this.$axios.post("/platform/h5/qsv/survey/subjects", { activityId: this.id }).then((res) => {
-                    if (res.code === 0) {
-                        this.activity = res.data.activity
-                        this.subjects = res.data.subjects
-                        this.answerRecordId = res.data.answerRecordId
-                        this.getAnswerRecord()
-                    }
-                })
+            //失败页直接替换为首页，避免扫码认证历史将用户再次带回无权参与的问卷。
+            onBack() {
+                if (this.loadError) {
+                    window.h5PopupHistory.clear().then(() => {
+                        window.location.replace("/platform/h5/home")
+                    })
+                    return
+                }
+                this.historyBack()
             },
 
-            //获取回答记录
+            //error 为接口业务错误或网络异常；持久展示提示，并禁止空问卷提交。
+            onLoadError(error) {
+                this.$set(this, "surveyReady", false)
+                this.$set(this, "loadError", (error && (error.msg || error.message)) || "问卷加载失败，请返回首页后重试")
+            },
+
+            //activityId 传扫码地址中的 id；成功返回活动、题目及答题记录 ID，再加载历史答案。
+            listSubjects() {
+                this.$set(this, "tableLoading", true)
+                this.$set(this, "surveyReady", false)
+                this.$set(this, "loadError", "")
+                return this.$axios.post("/platform/h5/qsv/survey/subjects", { activityId: this.id })
+                    .then((res) => {
+                        if (res.code !== 0 || !res.data || !res.data.activity || !res.data.answerRecordId || !Array.isArray(res.data.subjects)) {
+                            throw new Error(res.msg || "问卷数据不完整，请返回首页后重试")
+                        }
+                        this.$set(this, "activity", res.data.activity)
+                        this.$set(this, "subjects", res.data.subjects)
+                        this.$set(this, "answerRecordId", res.data.answerRecordId)
+                        return this.getAnswerRecord()
+                    })
+                    .catch((error) => {
+                        this.onLoadError(error)
+                    })
+                    .finally(() => {
+                        this.$set(this, "tableLoading", false)
+                    })
+            },
+
+            //answerRecordId 传题目接口返回的记录 ID；答案回显完成后才允许展示和提交问卷。
             getAnswerRecord() {
-                this.$axios.post("/platform/h5/qsv/survey/answerRecord", { answerRecordId: this.answerRecordId }).then((res) => {
-                    if (res.code === 0) {
-                        this.answerRecord = res.data
+                this.$set(this, "tableLoading", true)
+                this.$set(this, "surveyReady", false)
+                return this.$axios.post("/platform/h5/qsv/survey/answerRecord", { answerRecordId: this.answerRecordId })
+                    .then((res) => {
+                        if (res.code !== 0 || !res.data) {
+                            throw new Error(res.msg || "答题记录加载失败，请返回首页后重试")
+                        }
+                        this.$set(this, "answerRecord", res.data)
                         if (this.answerRecord.isFinish) {
                             this.$toast.success("您已完成该调查")
                         }
                         this.initAnswer()
-                    }
-                })
+                        this.$set(this, "loadError", "")
+                        this.$set(this, "surveyReady", true)
+                    })
+                    .catch((error) => {
+                        this.onLoadError(error)
+                    })
+                    .finally(() => {
+                        this.$set(this, "tableLoading", false)
+                    })
             },
 
             //直接回填答案数据，隐藏题没有组件引用，也能安全完成历史答卷回显。
@@ -281,6 +328,10 @@ layout("/layouts/platform_h5.html"){
 
             //手动提交
             onSubmit() {
+                //范围校验失败、加载未完成或已提交时，不发送无效答卷。
+                if (!this.surveyReady || this.tableLoading || this.loadError || !this.answerRecordId || this.answerRecord.isFinish) {
+                    return
+                }
                 const endTime = this.activity.endTime
                 if (this.isEnd) {
                     this.$toast("调查已结束")
@@ -307,6 +358,10 @@ layout("/layouts/platform_h5.html"){
 
             //自动提交
             autoSubmit(loading = null) {
+                //同时保护直接调用入口，避免绕过按钮状态提交空记录。
+                if (!this.surveyReady || this.tableLoading || this.loadError || !this.answerRecordId || this.answerRecord.isFinish) {
+                    return
+                }
                 this.$axios
                     .post("/platform/h5/qsv/survey/submitAnswer", {
                         answer: JSON.stringify({
@@ -337,8 +392,10 @@ layout("/layouts/platform_h5.html"){
         created() {
             const id = GetQueryString("id")
             if (id) {
-                this.id = id
+                this.$set(this, "id", id)
                 this.listSubjects()
+            } else {
+                this.onLoadError({ msg: "问卷链接缺少活动信息，请返回首页" })
             }
         }
     })