修改二维图片展示模式为contain

vue/src/views/Goods/components/Img.vue

@@ -188,7 +188,7 @@ export default {
       cursor: pointer;
       width: 900px;
       height: 600px;
-      object-fit: cover;
+      object-fit: contain;
     }
   }
 
@@ -205,7 +205,7 @@ export default {
         cursor: pointer;
         width: 100%;
         height: 100%;
-        object-fit: cover;
+        object-fit: contain;
       }
     }
   }