diff --git a/common/common.css b/common/common.css
index 395f295..5086fe9 100644
--- a/common/common.css
+++ b/common/common.css
@@ -795,13 +795,12 @@
 
 
 
-/* 回到顶部按钮 - 独立样式 */
+/* 回到顶部按钮 - 独立样式，固定在右下角 */
 .back-top-wrapper {
   position: fixed;
-  top: calc(45% - 80px);
-  right: 0;
-  z-index: 4;
-  transform: translateY(-50%);
+  bottom: 40px;
+  right: 20px;
+  z-index: 1000;
   width: 50px;
   height: 50px;
   display: flex;
@@ -812,8 +811,7 @@
   backdrop-filter: blur(20px);
   box-shadow: 0 8px 32px rgba(15, 23, 42, 0.6);
   border: 1px solid rgba(148, 163, 184, 0.15);
-  border-right: none;
-  border-radius: 8px 0 0 8px;
+  border-radius: 50%;
   transition: all 0.3s ease;
 }
 
@@ -826,7 +824,8 @@
 
 .back-top-wrapper:hover {
   background: linear-gradient(135deg, #38BDF8 0%, #6366F1 100%);
-  box-shadow: 0 4px 16px rgba(56, 189, 248, 0.4);
+  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.5);
+  transform: translateY(-3px);
 }
 
 .back-top-wrapper:hover img {