diff --git a/styles/components/navbar.ts b/styles/components/navbar.ts
index 2bb3a38..e2571da 100644
--- a/styles/components/navbar.ts
+++ b/styles/components/navbar.ts
@@ -4,6 +4,8 @@ export const navbarRight = `
 #navbar {
     padding: 8px 16px; /* 上下内边距 + .navbar-left & .navbar-right 的 min-height = 64px */
     min-height: 64px;
+    position: relative;
+    z-index: 1000;
     .navbar-left,
     .navbar-right {
       min-height: 48px;
@@ -128,6 +130,7 @@ export const navbarRight = `
     }
     /* 用户菜单 */
     .navbar-right .user-menu {
+      z-index: 1001;
       width: var(--custom-user-menu-width, 192px);
       max-width: 320px;
       > .header {