diff --git a/app/index/view/pc/topic_nas/help_detail.html b/app/index/view/pc/topic_nas/help_detail.html
index bb676885..9f5e9d38 100644
--- a/app/index/view/pc/topic_nas/help_detail.html
+++ b/app/index/view/pc/topic_nas/help_detail.html
@@ -46,7 +46,7 @@
                             {volist name="ac.child" id="ad"}
                             <li class="two-mues">
                                 <a href="#" class="two-a">
-                                    <div class="arrow"><img src="__IMAGES__/nas-jt.png" class="arrow" /></div>
+                                    <div class="arrow {if condition='$ad.id == $Request.get.cid'}rotate{/if}"><img src="__IMAGES__/nas-jt.png" class="arrow" /></div>
                                     <span>{$ad.name}</span>
                                 </a>
                                 <ul class="thress-mues">