diff --git a/public/frontend/event-site.html b/public/frontend/event-site.html
index e005939..f88e8b4 100644
--- a/public/frontend/event-site.html
+++ b/public/frontend/event-site.html
@@ -5395,6 +5395,21 @@
     .roadmap .timeline {
       align-items: stretch;
     }
+    /* 预选赛说明不换行：四列时加宽第三卡 */
+    @media (min-width: 981px) {
+      .roadmap .timeline {
+        grid-template-columns: minmax(0,1fr) minmax(0,1fr) minmax(0,1.72fr) minmax(0,1fr);
+      }
+      .roadmap .step:nth-child(3) {
+        padding-left: 20px;
+        padding-right: 20px;
+      }
+    }
+    @media (min-width: 681px) {
+      .roadmap .step:nth-child(3) p {
+        white-space: nowrap;
+      }
+    }
     .roadmap .step {
       display: flex !important;
       flex-direction: column;