diff --git a/common/common.css b/common/common.css
index ab2d810..036b4e0 100644
--- a/common/common.css
+++ b/common/common.css
@@ -122,6 +122,7 @@
   align-items: stretch;
   font-size: 14px;
   height: 100%;
+  flex-shrink: 0;
 }
 
 .nav-right .control {
@@ -1292,6 +1293,26 @@
   .nav-header {
     height: 50px !important;
     padding: 0 12px;
+    display: flex !important;
+    align-items: stretch !important;
+  }
+
+  .nav-header .nav-left {
+    display: flex !important;
+    align-items: stretch !important;
+    flex: 1;
+  }
+
+  .nav-header .nav-right {
+    display: flex !important;
+    align-items: stretch !important;
+    height: 100% !important;
+  }
+
+  .nav-right {
+    display: flex !important;
+    align-items: stretch !important;
+    height: 100% !important;
   }
 
   .nav-header .nav-left .nav-icon img {
@@ -1315,6 +1336,13 @@
     display: none !important;
   }
 
+  /* 注册按钮容器强制显示 */
+  .no-login.nav-desktop-link {
+    display: flex !important;
+    height: 100% !important;
+    align-items: stretch !important;
+  }
+
   .nav-menu .nav-item {
     padding: 0 8px;
     font-size: 13px;
@@ -1483,6 +1511,26 @@
   .nav-header {
     height: 48px !important;
     padding: 0 10px;
+    display: flex !important;
+    align-items: stretch !important;
+  }
+
+  .nav-header .nav-left {
+    display: flex !important;
+    align-items: stretch !important;
+    flex: 1;
+  }
+
+  .nav-header .nav-right {
+    display: flex !important;
+    align-items: stretch !important;
+    height: 100% !important;
+  }
+
+  .nav-right {
+    display: flex !important;
+    align-items: stretch !important;
+    height: 100% !important;
   }
 
   .nav-header .nav-left .nav-icon img {
@@ -1491,6 +1539,13 @@
     margin-right: 8px;
   }
 
+  /* 注册按钮容器强制显示 */
+  .no-login.nav-desktop-link {
+    display: flex !important;
+    height: 100% !important;
+    align-items: stretch !important;
+  }
+
   .nav-menu .nav-item {
     padding: 0 6px;
     font-size: 12px;