Fix：3279 【礼品功能】选择封面交互形式优化，应该两边低于中间，而不是高于中间

pkg_user/views/gift/components/CoverPicker.vue

@@ -19,8 +19,8 @@
       >
         <swiper-item v-for="(item, index) in list" :key="index">
           <view class="cover-item">
-            <view class="img-wrap"  :class="{ 'v12-mt-8': currentIndex === index }">
-              <view class="pro-img-wrap ">
+            <view class="img-wrap"  :class="currentIndex === index ? 'v12-mt-8' : 'v12-mt-4'">
+              <view class="pro-img-wrap " v-show="currentIndex === index ">
                 <image :src="product.image" class="pro-cover-image" mode="widthFix|heightFix" />
               </view>
               <image :src="item.cover" class="cover-image" mode="widthFix|heightFix" />
@@ -103,7 +103,7 @@ export default {
   right: 0;  
   margin: auto;
   border: 10rpx solid #FDF0D3;
-  top: -30px;
+  top: -40px;
 }
 .img-wrap{
   position: relative;