fix style

@@ -14,7 +14,7 @@
         <div class="price-wrap">
           <div class="price-left">
             <label v-if="priceTag" class="price-tag" :class="priceTag"></label>
-            <span class="price">￥{{salesPrice}}</span>
+            <span v-show="salesPrice" class="price">￥{{salesPrice}}</span>
           </div>
           <div class="btn-right btn-buy hover-opacity" :class="{'btn-disable': !hasStock}">
             <span class="iconfont icon-cart"></span>购买
@@ -231,7 +231,7 @@ export default {
   .price-tag {
     width: 94px;
     height: 28px;
-    margin-right: 16px;
+    margin-right: 10px;
     background-size: 100%;
   }