提交样式

src/views/mobile/topic/detail.vue

 <template>
     <div class="overfolowWrapper" ref="overfolowWrapper" @scroll.passive="getScroll($event)" v-if="topicInfo">
         <div class="bg"
-             :style="{backgroundImage:topicInfo.topicBackground?'url('+topicInfo.topicBackground+')':'url('+topicInfo.topicCover+')',backgroundSize:topicInfo.topicBackground?'contain':'unset'}">
+             :style="{backgroundImage:topicInfo.topicBackground?'url('+topicInfo.topicBackground+')':'url('+topicInfo.topicCover+')',backgroundSize:topicInfo.topicBackground?'100%':'unset'}">
             <div id="topicBgWrap" v-if="topicInfo.topicBackground">
                 <div id="topicTitle">
                     <span>#</span><span>{{topicInfo.topicTitle}}</span><span>#</span>
@@ -1413,8 +1413,8 @@
         height: 100%;
         min-height: 3.5rem;
         background-repeat: no-repeat;
-        background-size: cover;
-        background-position: center;
+        background-size: 100%;
+        background-position: top center;
 
         > div:first-of-type {
             width: 100%;