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-image: url(/Imgs/bg.jpg);
    background-attachment: fixed;
    background-repeat: no-repeat;
    background-size: cover;
}
.login{ height:260px;width:260px;padding: 20px;background-color:rgba(0,0,0,0.5);border-radius: 4px;position:absolute;left: 50%;top: 50%; 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%; }