增加部分辅助类样式

src/assets/styles/util.scss

@@ -1,10 +1,12 @@
 .u-relative,
-.u-rela {
+.u-rela,
+.relative {
 	position: relative;
 }
 
 .u-absolute,
-.u-abso {
+.u-abso,
+.absolute {
 	position: absolute;
 }
 
@@ -47,6 +49,12 @@ text {
 	font-size: 17px;
 }
 
+.flex {
+	display: flex;
+	flex-direction: row;
+	align-items: center;
+}
+
 .u-flex {
 	display: flex;
 	flex-direction: row;
@@ -61,6 +69,13 @@ text {
 	flex-wrap: nowrap;
 }
 
+.free-price {
+	text-decoration: line-through;
+	color: #999;
+}
+.cur-pointer{
+	cursor: pointer;
+}
 .u-col-center {
 	align-items: center;
 }