feat: add less vars of border-radius & opacity (#4596)

src/sku/index.less

@@ -35,7 +35,7 @@
       margin: @padding-sm 0;
       overflow: hidden;
       background: @background-color;
-      border-radius: 4px;
+      border-radius: @border-radius-base;
 
       img {
         position: absolute;
@@ -141,7 +141,7 @@
       font-size: 13px;
       line-height: 16px;
       vertical-align: middle;
-      border-radius: 4px;
+      border-radius: @border-radius-base;
 
       &::before {
         position: absolute;
@@ -159,7 +159,7 @@
         height: 24px;
         margin: 4px 0 4px 4px;
         object-fit: cover;
-        border-radius: 2px;
+        border-radius: @border-radius-sm;
       }
 
       &-name {
@@ -255,7 +255,7 @@
       height: 64px;
       margin-right: @padding-xs;
       background: @sku-item-background-color;
-      border-radius: 2px;
+      border-radius: @border-radius-sm;
 
       img {
         width: 100%;