<style>
        .qu_nr{width: 100%;padding-bottom: 60px;}
        .shipin_p{ background: #fff; box-shadow: 2px 2px 25px #efefef; margin-top: 25px; padding: 0 3.5% 40px 3.5%;}
.shipin_p video {
    width: 72%;
    height: 550px;
    background: #000;
    border-radius: 15px;
    overflow: hidden;
    margin: 48px auto 0 auto;
    display: block;
}
@media screen and (max-width: 770px){ 
.shipin_p video {
    width: 100%;
    height: auto;
margin: 0 auto 0 auto; 
}
        </style>
<div class="shipin_p">

<div class="ship_nr">
<video src="video/xin_04.mp4" controls="" id="video" autoplay="autoplay" loop="loop"></video>
<div class="clear">
</div>
</div>
</div>