.content{width:100%;margin:auto;margin-top:30px;margin-bottom: 60px;}
    .content img{ max-width:800px; margin:auto; margin-top:20px; margin-bottom:20px;}
    .content video{ max-width:800px;  margin:auto; margin-top:20px; margin-bottom:20px;}
    .content p video {margin: auto;    margin-top: 20px;   margin-bottom: 20px;    display: block;}
    .content p{ font-size:15px; color:#999; line-height:30px; text-indent:2em;}
    .content span{ font-size:15px; color:#999; line-height:0px; text-indent:2em;}