diff --git a/templates/index.html b/templates/index.html
index 4e4ac22..84f0c59 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -8,7 +8,7 @@
 </head>
 <body>
     <div class="container">
-        <button class="theme-toggle" aria-label="切换主题">🌙</button>
+        <button class="theme-toggle" style="position:fixed;top:20px;right:20px;" aria-label="切换主题">🌙</button>
         <div class="avatar">
             <span class="sparkle">👋</span>
         </div>
diff --git a/templates/login.html b/templates/login.html
index c9e7f53..8a003a0 100644
--- a/templates/login.html
+++ b/templates/login.html
@@ -8,7 +8,7 @@
 </head>
 <body>
     <div class="container auth-container">
-        <button class="theme-toggle" aria-label="切换主题">🌙</button>
+        <button class="theme-toggle" style="position:fixed;top:20px;right:20px;" aria-label="切换主题">🌙</button>
         <div class="avatar">
             <span>🔐</span>
         </div>
diff --git a/templates/register.html b/templates/register.html
index 74dffcf..b41f59e 100644
--- a/templates/register.html
+++ b/templates/register.html
@@ -8,7 +8,7 @@
 </head>
 <body>
     <div class="container auth-container">
-        <button class="theme-toggle" aria-label="切换主题">🌙</button>
+        <button class="theme-toggle" style="position:fixed;top:20px;right:20px;" aria-label="切换主题">🌙</button>
         <div class="avatar">
             <span>📝</span>
         </div>
