diff --git a/scss/components/_collapse.scss b/scss/components/_collapse.scss
index 98d69246..d02ee3b0 100644
--- a/scss/components/_collapse.scss
+++ b/scss/components/_collapse.scss
@@ -1,4 +1,5 @@
 .#{$ns}Collapse {
+  border: none;
   padding: 0;
   margin-bottom: $Form-item-gap;
 
@@ -43,10 +44,11 @@
 
   &-content {
     transition: height 0.35s ease;
+
     &.in,
     &.out {
       height: 0;
       overflow: hidden;
     }
   }
-}
+}
\ No newline at end of file