body{overflow:hidden;}

.video-player{background-color: transparent;display: block;position: absolute;z-index: 1;top:0;}
.video_mask{ width:100%; height:100%; position:absolute; left:0; top:0; z-index:90; background-color:rgba(0,0,0,0.5); }
.login{ height:260px;width:400px;padding: 40px;background-color:rgba(255,255,255,0.5);border-radius: 4px;position:absolute;left: 45%;top: 40%; margin:-150px 0 0 -150px;z-index:99;}
.login h1{ text-align:center; color:#fff; font-size:24px; margin-bottom:20px; }
.form_code{ position:relative; }
.form_code .code{ position:absolute; right:0; top:1px; cursor:pointer; }
.login_btn{ width:100%; }