更换 app 下载图

@@ -9,9 +9,9 @@
     <div class="main-wrapper">
         <div class="intro intro-1">
             {{#if devEnv}}
-                <img src="http://webstatic.dev.yohobuy.com/img/download/intro-1.jpg">
+                <img src="http://webstatic.dev.yohobuy.com/img/download/intro-1.png">
             {{^}}
-                <img src="http://cdn.yoho.cn/yohobuy/assets/img/download/intro-1.jpg">
+                <img src="http://cdn.yoho.cn/yohobuy/assets/img/download/intro-1.png">
             {{/if}}
         </div>
         <div class="intro intro-2">
@@ -23,16 +23,16 @@
         </div>
         <div class="intro intro-3">
             {{#if devEnv}}
-                <img src="http://webstatic.dev.yohobuy.com/img/download/intro-3.jpg">
+                <img src="http://webstatic.dev.yohobuy.com/img/download/intro-3.png">
             {{^}}
-                <img src="http://cdn.yoho.cn/yohobuy/assets/img/download/intro-3.jpg">
+                <img src="http://cdn.yoho.cn/yohobuy/assets/img/download/intro-3.png">
             {{/if}}
         </div>
         <div class="intro intro-4">
             {{#if devEnv}}
-                <img src="http://webstatic.dev.yohobuy.com/img/download/intro-4.jpg">
+                <img src="http://webstatic.dev.yohobuy.com/img/download/intro-4.png">
             {{^}}
-                <img src="http://cdn.yoho.cn/yohobuy/assets/img/download/intro-4.jpg">
+                <img src="http://cdn.yoho.cn/yohobuy/assets/img/download/intro-4.png">
             {{/if}}
         </div>
         <div class="intro intro-5">
@@ -65,4 +65,4 @@
         </a>
     </div>
 </div>
-{{> layout/footer}}
\ No newline at end of file
+{{> layout/footer}}