【功能优化】商城客服页面匹配暗黑模式；

src/views/mall/promotion/kefu/components/message/OrderItem.vue

@@ -112,7 +112,7 @@ function formatOrderStatus(order: any) {
   border-radius: 10px;
   padding: 10px;
   border: 1px var(--el-border-color) solid;
-  background-color: var(--app-content-bg-color); // 透明色，暗黑模式下也能体现
+  background-color: rgba(128, 128, 128, 0.3); // 透明色，暗黑模式下也能体现
 
   .order-card-header {
     height: 28px;

src/views/mall/promotion/kefu/components/message/ProductItem.vue

@@ -77,7 +77,7 @@ const openDetail = (spuId: number) => {
 
 .product-warp {
   width: 100%;
-  background-color: var(--app-content-bg-color);
+  background-color: rgba(128, 128, 128, 0.3);
   border: 1px solid var(--el-border-color);
   border-radius: 8px;
   display: flex;