.one{margin:5px auto;height:227px;width:1400px;overflow:hidden;position:relative;}
.one ul{height:160px;width:100000px;position:absolute;left:0;} /*ul width的宽不能过小*/
.one ul li{display:block;float:left;margin:5px;height:150px;border-radius:5px;position:relative;}
.one ul li a{display:inline-block;height:150px;}
.one ul li img{border-radius:5px;display:block;}
.one ul li a span{height:0;display:block;background:rgba(0,0,0,0.4);position:absolute;bottom:0;color:#fff;font-size:0px;}
.one ul li a:hover span{height:150px;line-height:150px;font-size:20px;text-align:center;transition:all 0.7s;}