no message

src/components/ScenicSpotTicket/orderPreview.vue

@@ -101,14 +101,14 @@
         <span class="text-h6 text-primary product-price">CNY {{ moneyFormat(sumPrice,0) }}</span>
       </div>
       <div class="q-mt-md text-right"
-      :class="{'row wrap justify-end items-start':$q.platform.is.mobile}">
+      :class="[$q.platform.is.mobile?'row wrap justify-end items-start':'']">
         <span :class="{'col-12 q-mb-sm':$q.platform.is.mobile}">
         <span class="f12 text-negative" v-if="!p.startDate" 
         :class="{'q-mr-lg':$q.platform.is.desktop}">
           {{$q.platform.is.mobile?'請選擇上面的出行日期':'請選擇左側的出行日期'}} 
         </span>
         <span class="f12 text-negative" 
-        :class="{'q-mr-lg':$q.platform.is.desktop}"
+        :class="[$q.platform.is.desktop?'q-mr-lg':'']"
         v-if="p.startDate&&(!selectedObj||!MailingStateObj)">
           {{`請選擇上面的門票類型、取票方式`}} 
         </span>

src/pages/ScenicSpotTicket/details.vue

@@ -221,7 +221,7 @@
       >
         <div class="text-h6">選擇方案</div>
           <div
-            class="rounded-borders bg-white q-px-xs q-mt-xs q-pt-xs"
+            class="rounded-borders bg-white q-pa-md q-mt-md"
             v-if="$q.platform.is.mobile"
           >
             <div style="background: rgba(0, 0, 0, 0.05);border-radius: 4px;" 

src/pages/line/orderPreview.vue

@@ -1075,8 +1075,9 @@ export default {
               this.unionCity = this.price.unionCityList.find(
                 (x) => x.cityId == this.order.order.startCityId
               );
+              
               if (
-                this.unionCity.backFlight &&
+                this.unionCity&&this.unionCity.backFlight &&
                 this.unionCity.backFlight.addPrice
               ) {
                 this.price.originalB2CPrice +=