html,body{margin:0; padding:0; width:100vw; height:100vh;}
body{
    font:normal 14px/1.5 "Helvetica Neue",Tahoma,Arial,"PingFang SC","Hiragino Sans GB","Microsoft Yahei",sans-serif;
    background: #000 url("bg.jpg") no-repeat left top;
    background-size: cover;
    overflow: hidden;
}
:focus {outline: 0;}
.hide {display: none !important;}


/*container box*/
.container{
    position: relative; height: 100%; overflow: hidden;
    margin: 0 auto; width:960px; box-shadow: 0 0 20px rgba(0,0,0,0.1);
    display:flex;
    justify-content:center;
    align-items:center;
}

.videowrap {
    width: 960px; height: 540px;
}

.videowrap video {
    width: 100%;
}