body{
    position: relative;
    background-color: #eef1f5;
}
body,html{
    overflow: hidden;
    width: 100%;
    height: 100%;
}
ul,li,ol{
    padding-left: 0;
    margin-bottom: 0!important;
    list-style: none;
}
/*头部--------------------------------------------------*/
header{
    height: 80px;
    width: 100%;
    background-color: #fff;
}
/*左侧栏--------------------------------------------------*/
nav{
    position: fixed;
    width: 200px;
    height: 100%;
    left: 0;
    top:0;
    padding-top: 80px;
}
.nav-ul{
    background-color: #fff;
}
/*内容--------------------------------------------------*/
section{
    width: 100%;
    padding-left: 200px;
}