diff --git a/system1-factory/web/pages/attendance/annual-overview.html b/system1-factory/web/pages/attendance/annual-overview.html
index f57b222..1aee6be 100644
--- a/system1-factory/web/pages/attendance/annual-overview.html
+++ b/system1-factory/web/pages/attendance/annual-overview.html
@@ -63,14 +63,21 @@
     /* 테이블 */
     .data-table {
       width: 100%;
-      border-collapse: collapse;
+      border-collapse: collapse !important;
+      border-spacing: 0 !important;
       font-size: 0.85rem;
       background: white;
+      table-layout: fixed;
     }
+    .data-table thead { display: table-header-group; }
     .data-table th, .data-table td {
       padding: 0.6rem 0.5rem;
       text-align: center;
       border: 1px solid #e5e7eb;
+      border-top: none;
+    }
+    .data-table thead tr:first-child th {
+      border-top: 1px solid #e5e7eb;
     }
     .data-table th {
       background: #f9fafb;