diff --git a/frontend/src/pages/NewMaterialsPage.css b/frontend/src/pages/NewMaterialsPage.css
index d5de3eb..e0cb3db 100644
--- a/frontend/src/pages/NewMaterialsPage.css
+++ b/frontend/src/pages/NewMaterialsPage.css
@@ -305,9 +305,6 @@
   display: grid;
   /* 기본 그리드는 사용하지 않음 - 각 카테고리별 전용 클래스 사용 */
   background: #f3f4f6;
-  border-top: 1px solid #d1d5db;
-  border-left: 1px solid #d1d5db;
-  border-right: 1px solid #d1d5db;
   border-bottom: 2px solid #9ca3af;
   font-size: 11px;
   font-weight: 600;
@@ -328,9 +325,14 @@
   background: #f3f4f6;
 }
 
+.detailed-grid-header > div:first-child,
+.detailed-grid-header .filterable-header:first-child {
+  border-left: 1px solid #d1d5db;
+}
+
 .detailed-grid-header > div:last-child,
 .detailed-grid-header .filterable-header:last-child {
-  border-right: none;
+  border-right: 1px solid #d1d5db;
 }
 
 /* PIPE 전용 헤더 - 9개 컬럼 */
@@ -916,8 +918,6 @@
   display: grid;
   /* 기본 그리드는 사용하지 않음 - 각 카테고리별 전용 클래스 사용 */
   border-bottom: 1px solid #d1d5db;
-  border-left: 1px solid #d1d5db;
-  border-right: 1px solid #d1d5db;
   background: white;
   transition: background 0.15s;
   font-size: 12px;
@@ -932,8 +932,12 @@
   min-height: 28px;
 }
 
+.detailed-material-row .material-cell:first-child {
+  border-left: 1px solid #d1d5db;
+}
+
 .detailed-material-row .material-cell:last-child {
-  border-right: none;
+  border-right: 1px solid #d1d5db;
 }
 
 .detailed-material-row:hover {