html{width:100%;margin:0px;height:100%;}
body{width:100%;margin:0;height:100%; 
color:#000;
font-family:Times New Roman,Georgia,serif;background-color:#fff;}
.wrap{/*text-align:center;*/max-width:1200px;line-height:28px;border:1px solid red;margin:0 auto;padding:10px;font-size:19px;}
.wpob{width:70%;margin:0 auto;display:block;}
.wpob_2{width:40%;margin:0 auto;display:block;}
.fl{width:90%;margin:0 auto;display:block;}
.span_b{font-weight:700;}
.span_r{color:red;}
.container {text-align:center; margin:0 auto;
    position: relative;
     width: 90%;
     height: 0;
     padding-bottom: 56.25%;
 }
 .video {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
 }