diff --git a/system1-factory/web/pages/attendance/annual-overview.html b/system1-factory/web/pages/attendance/annual-overview.html
index 1aee6be..c0da6f5 100644
--- a/system1-factory/web/pages/attendance/annual-overview.html
+++ b/system1-factory/web/pages/attendance/annual-overview.html
@@ -60,24 +60,21 @@
     .dot-longservice { background: #f3e8ff; border: 1px solid #a855f7; }
     .dot-special { background: #fce7f3; border: 1px solid #ec4899; }
 
-    /* 테이블 */
+    /* 테이블 — Tailwind preflight 충돌 해소 */
     .data-table {
       width: 100%;
-      border-collapse: collapse !important;
-      border-spacing: 0 !important;
+      border-collapse: collapse;
       font-size: 0.85rem;
       background: white;
-      table-layout: fixed;
     }
-    .data-table thead { display: table-header-group; }
+    .data-table, .data-table thead, .data-table tbody, .data-table tr {
+      border: none !important;
+      border-style: none !important;
+    }
     .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;
+      border: 1px solid #e5e7eb !important;
     }
     .data-table th {
       background: #f9fafb;