要使顶部导航不随着滑动而动的话要给样式里加上一下代码
<nav class="navbar navbar-default navbar-fixed-top" role="navigation">
CSS代码为
height:65px;
background:#fff;
text-align: center;
box-shadow: 0 2px 6px 0 rgba(0,0,0,0.04);
100%;
position:fixed;
z-index:999;
top:0;