diff --git a/src/less/case/loader/sort.list.less b/src/less/case/loader/sort.list.less
new file mode 100644
index 000000000..18733ce5e
--- /dev/null
+++ b/src/less/case/loader/sort.list.less
@@ -0,0 +1,5 @@
+@import "../../index";
+
+.bi-sortable-holder {
+  border: 1px dashed @color-bi-border-line;
+}