diff --git a/frontend/src/router/index.ts b/frontend/src/router/index.ts
index af69678..7594ec5 100644
--- a/frontend/src/router/index.ts
+++ b/frontend/src/router/index.ts
@@ -81,7 +81,7 @@ router.beforeEach((to, _from, next) => {
   const token = localStorage.getItem('access_token')
   const publicPaths = ['/login', '/preview']
   const isPublic = Boolean(to.meta.public) || publicPaths.some(p => to.path.startsWith(p))
-  document.title = `${to.meta.title || '智教助手'} - 智教助手`
+  document.title = to.meta.title ? `${to.meta.title} - 智教助手` : '智教助手'
 
   if (!isPublic && !token) {
     next({ path: '/login', query: { redirect: to.fullPath } })