refactor: nas主题中英文logo问题

app/index/view/public/nas_header.html

@@ -1,6 +1,8 @@
 <header class="narsPage-head">
     <div class="headcenter">
-        <a href="{:url('/index/topic/nas/index')}"><img class="logico" style="cursor:pointer;" src="__IMAGES__/logo_nas.png" /></a>
+        <a href="{:url('/index/topic/nas/index')}">
+            <img class="logico" style="cursor:pointer;" src="__IMAGES__/logo_nas_{:cookie('think_lang')}.png" />
+        </a>
         {notempty name="header_navigation"}
         <nav class="headnav">
             {volist name="header_navigation" id="nav" key="idx"}