text-change

 $(window).on('seckill', function() {
-    $('.btn-c').before('<a href="https://union.yoho.cn/union/app-downloads.html" class="seckill-download-app">下载APP秒杀</a>');
+    $('.btn-c').before('<a href="https://union.yoho.cn/union/app-downloads.html" class="seckill-download-app">下载APP购买</a>');
     $('.btn-c').remove();
 });