diff --git a/src/styles.css b/src/styles.css
index 4d5e61d..d8c48ea 100644
--- a/src/styles.css
+++ b/src/styles.css
@@ -151,6 +151,7 @@ html, body {
 /* 登记卡详情 */
 .detail-card {
   right: 24px; bottom: 22px; width: min(320px, 82vw);
+  z-index: 30; /* 始终置顶，盖在标记便签层之上 */
   padding: 18px 20px; border-radius: 4px;
   background: linear-gradient(180deg, rgba(232,216,182,0.96), rgba(214,196,156,0.96));
   color: var(--ink); box-shadow: 0 18px 50px rgba(0,0,0,0.55), inset 0 0 0 1px rgba(90,61,43,0.4);