diff --git a/signin/activity_tpl b/signin/activity_tpl
index 756ffcc..fa010a2 100644
--- a/signin/activity_tpl
+++ b/signin/activity_tpl
@@ -13,20 +13,22 @@
     <div style="
         height: 100%;
         width: 100%;
+        min-height: 410px;
         position: relative;
         background: url('https://openi.pcl.ac.cn/OpenIOSSG/promote/raw/branch/master/signin/imgs/07_gitlogin.jpg') center top no-repeat;
     ">
+        <a href="https://openi.org.cn/index.php?m=content&c=index&a=lists&catid=231" style="
+            width: 180px;
+            height: 40px;
+            box-sizing: border-box;
+            background: rgb(22, 47, 255);
+            border: 1px solid rgb(22, 206, 255);
+            color: #FFF;
+            line-height: 40px;
+            margin-top: 350px;
+        ">
+            查看详情
+        </a>
     </div>
-    <a href="https://openi.org.cn/index.php?m=content&c=index&a=lists&catid=231" style="
-        width: 180px;
-        height: 40px;
-        box-sizing: border-box;
-        background: rgb(22, 47, 255);
-        border: 1px solid rgb(22, 206, 255);
-        color: #FFF;
-        line-height: 40px;
-        margin-top: 350px;
-    ">
-        查看详情
-    </a>
+    
 </div>
\ No newline at end of file