diff --git a/components/CollapseTransition/CollapseTransition.vue b/components/CollapseTransition/CollapseTransition.vue
index 9ea5df4..2407431 100644
--- a/components/CollapseTransition/CollapseTransition.vue
+++ b/components/CollapseTransition/CollapseTransition.vue
@@ -8,7 +8,7 @@
 </template>
 
 <script setup>
-import { ref, watch, nextTick } from 'vue';
+import { ref, watch, nextTick, getCurrentInstance } from 'vue';
 
 const props = defineProps({
     show: Boolean,
@@ -26,11 +26,18 @@ const wrapStyle = ref({
 });
 
 const contentRef = ref(null);
+const instance = getCurrentInstance();
 
 // 获取高度（兼容 H5 + 小程序）
 function getContentHeight() {
     return new Promise((resolve) => {
-        const query = uni.createSelectorQuery().in(this ? this : undefined);
+        let query;
+        // #ifdef MP-WEIXIN
+        query = uni.createSelectorQuery().in(instance);
+        // #endif
+        // #ifndef MP-WEIXIN
+        query = uni.createSelectorQuery();
+        // #endif
         query
             .select('.content-inner')
             .boundingClientRect((data) => {
diff --git a/packageA/pages/chat/components/ai-paging.vue b/packageA/pages/chat/components/ai-paging.vue
index 5c34028..36519b9 100644
--- a/packageA/pages/chat/components/ai-paging.vue
+++ b/packageA/pages/chat/components/ai-paging.vue
@@ -255,8 +255,8 @@
                 </view>
             </view>
             <view class="ai-tips">本服务为AI生成内容，结果仅供参考</view>
-            <!-- btn -->
-            <CollapseTransition :show="showfile">
+            <!-- 文件上传区域 - 使用绝对定位向上展开，避免被tabbar遮挡 -->
+            <view class="file-upload-popup" :class="{ show: showfile }">
                 <view class="area-tips">
                     <uni-icons type="info-filled" color="#ADADAD" size="15"></uni-icons>
                     上传后自动解析简历内容
@@ -275,7 +275,7 @@
                         <text>文件上传</text>
                     </view>
                 </view>
-            </CollapseTransition>
+            </view>
 
             <!-- filelist -->
             <view class="area-uploadfiles" v-if="filesList.length">
@@ -335,7 +335,6 @@ import { storeToRefs } from 'pinia';
 // 移除重复导入，使用从globalFunction注入的config
 import useChatGroupDBStore from '@/stores/userChatGroupStore';
 import MdRender from '@/components/md-render/md-render.vue';
-import CollapseTransition from '@/components/CollapseTransition/CollapseTransition.vue';
 import PopupFeeBack from './popupbadFeeback.vue';
 import AudioWave from './AudioWave.vue';
 import WaveDisplay from './WaveDisplay.vue';
@@ -1374,6 +1373,29 @@ image-margin-top = 40rpx
     color: #434343;
     margin-top: 18rpx
 }
+
+/* 文件上传弹窗 - 向上展开，避免被tabbar遮挡 */
+.file-upload-popup {
+    position: absolute;
+    bottom: 100%;
+    left: 0;
+    right: 0;
+    background: #FFFFFF;
+    padding: 0 28rpx 24rpx 28rpx;
+    box-shadow: 0rpx -4rpx 10rpx 0rpx rgba(11,44,112,0.06);
+    transform: translateY(20rpx);
+    opacity: 0;
+    visibility: hidden;
+    transition: all 0.3s ease;
+    z-index: 1002;
+}
+
+.file-upload-popup.show {
+    transform: translateY(0);
+    opacity: 1;
+    visibility: visible;
+}
+
 .area-file
     display: grid
     width: 100%