--- a/css/tram-im.css	Sun Apr 03 22:03:54 2016 +0800
+++ b/css/tram-im.css	Sun Apr 03 23:38:18 2016 +0800
@@ -170,11 +170,11 @@
     width: 100%;
     z-index: 2;
 }
-.video-block .buttons > button.autofade {
+.video-block .autofade {
     transition: opacity 0.1s ease-in-out;
     opacity: 0;
 }
-.video-block:hover .buttons > button.autofade {
+.video-block:hover .autofade {
     opacity: 1;
 }
 @keyframes pulsation {