Feat(商品):1、库存为0时，加入购物车及立即购买变成灰色；2、库存为0时，相应规格右上角显示缺货标签，并且该缺货规格为灰色不可点击状态

assets/css/goods.less

@@ -25,7 +25,7 @@
 }
 
 .goods-section {
-  margin: 24rpx;
+  margin: 0 24upx 24upx 24upx;
   padding: 30rpx 24rpx;
   border-radius: 20rpx;
   background: #fff;
@@ -103,6 +103,15 @@
     color: #333;
     font-size: 30rpx;
   }
+  .store-btn {
+    display: flex;
+    padding: 12upx;
+    border-radius: 6upx;
+    color: #fff;
+    line-height: 20upx;
+    font-size: 24rpx;
+    background-color: #FF564A;
+  }
 
   .value {
     color: #666;

assets/css/style.less

@@ -646,6 +646,7 @@ page {
 }
 
 .product-window .productWinList .item .listn .itemn {
+  position: relative;
   border: 1px solid #bbb;
   font-size: 0.26*100rpx;
   color: #282828;
@@ -659,6 +660,23 @@ page {
   background-color: #eb3729;
   border-color: #eb3729;
 }
+.product-window .productWinList .item .listn .itemn.disabled {
+  color: #333;
+  background-color: #F1F1F1;
+  border-color: #F1F1F1;
+}
+.product-window .productWinList .item .listn .itemn.disabled .tag {
+  position: absolute;
+  top: -18upx;
+  right: -18upx;
+  height: 28upx;
+  padding: 0 6upx;
+  border-radius: 6upx;
+  color: #fff;
+  line-height: 28upx;
+  font-size: 10px;
+  background-color: #FD5749;
+}
 
 .product-window .cart {
   margin-top: 0.36*100rpx;