diff --git a/frontend/app/globals.css b/frontend/app/globals.css
index b3dbab89..b9173da6 100644
--- a/frontend/app/globals.css
+++ b/frontend/app/globals.css
@@ -402,18 +402,9 @@ select {
 /* 필요시 특정 컴포넌트에 대한 스타일 오버라이드를 여기에 추가 */
 /* 예: Calendar, Table 등의 미세 조정 */
 
-/* 모바일에서 테이블 레이아웃 고정 (화면 밖으로 넘어가지 않도록) */
-@media (max-width: 639px) {
-  .table-mobile-fixed {
-    table-layout: fixed;
-  }
-}
-
-/* 데스크톱에서 테이블 레이아웃 자동 (기본값이지만 명시적으로 설정) */
-@media (min-width: 640px) {
-  .table-mobile-fixed {
-    table-layout: auto;
-  }
+/* 테이블 레이아웃 고정 (셀 내용이 영역을 벗어나지 않도록) */
+.table-mobile-fixed {
+  table-layout: fixed;
 }
 
 /* 그리드선 숨기기 */
diff --git a/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx b/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx
index b5e8852f..597c759a 100644
--- a/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx
+++ b/frontend/lib/registry/components/split-panel-layout/SplitPanelLayoutComponent.tsx
@@ -2670,7 +2670,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                           <td
                                             key={colIdx}
                                             className="px-3 py-2 text-sm whitespace-nowrap text-foreground"
-                                            style={{ textAlign: col.align || "left" }}
+                                            style={{ textAlign: col.align || "left", overflow: "hidden", textOverflow: "ellipsis" }}
                                           >
                                             {formatCellValue(
                                               col.name,
@@ -2732,7 +2732,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                     <td
                                       key={colIdx}
                                       className="px-3 py-2 text-sm whitespace-nowrap text-foreground"
-                                      style={{ textAlign: col.align || "left" }}
+                                      style={{ textAlign: col.align || "left", overflow: "hidden", textOverflow: "ellipsis" }}
                                     >
                                       {formatCellValue(
                                         col.name,
@@ -3415,7 +3415,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                       <td
                                         key={colIdx}
                                         className="px-3 py-2 text-sm whitespace-nowrap text-foreground"
-                                        style={{ textAlign: col.align || "left" }}
+                                        style={{ textAlign: col.align || "left", overflow: "hidden", textOverflow: "ellipsis" }}
                                       >
                                         {formatCellValue(
                                           col.name,
diff --git a/frontend/lib/registry/components/v2-split-panel-layout/SplitPanelLayoutComponent.tsx b/frontend/lib/registry/components/v2-split-panel-layout/SplitPanelLayoutComponent.tsx
index 9ed4c81f..41fa815e 100644
--- a/frontend/lib/registry/components/v2-split-panel-layout/SplitPanelLayoutComponent.tsx
+++ b/frontend/lib/registry/components/v2-split-panel-layout/SplitPanelLayoutComponent.tsx
@@ -3603,7 +3603,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                           <td
                                             key={colIdx}
                                             className="px-3 py-2 text-sm whitespace-nowrap text-foreground"
-                                            style={{ textAlign: col.align || "left" }}
+                                            style={{ textAlign: col.align || "left", overflow: "hidden", textOverflow: "ellipsis" }}
                                           >
                                             {formatCellValue(
                                               col.name,
@@ -3700,7 +3700,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                     <td
                                       key={colIdx}
                                       className="px-3 py-2 text-sm whitespace-nowrap text-foreground"
-                                      style={{ textAlign: col.align || "left" }}
+                                      style={{ textAlign: col.align || "left", overflow: "hidden", textOverflow: "ellipsis" }}
                                     >
                                       {formatCellValue(
                                         col.name,
@@ -4197,7 +4197,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                   onClick={() => toggleRightItemExpansion(`tab_${activeTabIndex}_${tabItemId}`)}
                                 >
                                   {tabSummaryColumns.map((col: any) => (
-                                    <td key={col.name} className="px-3 py-2 text-xs">
+                                    <td key={col.name} className="px-3 py-2 text-xs" style={{ overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}>
                                       {col.type === "progress"
                                         ? renderProgressCell(col, item, selectedLeftItem)
                                         : formatCellValue(
@@ -4313,7 +4313,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                   onClick={() => toggleRightItemExpansion(`tab_${activeTabIndex}_${tabItemId}`)}
                                 >
                                   {listSummaryColumns.map((col: any) => (
-                                    <td key={col.name} className="px-3 py-2 text-xs">
+                                    <td key={col.name} className="px-3 py-2 text-xs" style={{ overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}>
                                       {col.type === "progress"
                                         ? renderProgressCell(col, item, selectedLeftItem)
                                         : formatCellValue(
@@ -4706,8 +4706,8 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                     {columnsToShow.map((col, colIdx) => (
                                       <td
                                         key={colIdx}
-                                        className="px-3 py-2 text-xs whitespace-nowrap"
-                                        style={{ textAlign: col.align || "left" }}
+                                        className="px-3 py-2 text-xs"
+                                        style={{ textAlign: col.align || "left", overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}
                                       >
                                         {col.type === "progress"
                                           ? renderProgressCell(col, item, selectedLeftItem)
@@ -4853,7 +4853,7 @@ export const SplitPanelLayoutComponent: React.FC<SplitPanelLayoutComponentProps>
                                       onClick={() => toggleRightItemExpansion(itemId)}
                                     >
                                       {columnsToDisplay.map((col) => (
-                                        <td key={col.name} className="px-3 py-2 text-xs">
+                                        <td key={col.name} className="px-3 py-2 text-xs" style={{ overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap" }}>
                                           {formatCellValue(
                                             col.name,
                                             getEntityJoinValue(item, col.name),