bug fixes

src/views/activity/Item.vue

@@ -163,8 +163,11 @@ export default {
 .detail-pic {
   margin-left: -15px;
   margin-right: -15px;
+  height: 210px;
   img {
     width: 100%;
+    height: 100%;
+    object-fit: cover;
   }
 }
 .detail-user {