*{
    box-sizing: border-box;
}
body{
    font-family: "Microsoft Yahei","微软雅黑";
    color: #333;
    font-size: 16px;
    line-height: 1.5em;
    background-color: #efefef;
}
.clearfix::after{
    content: "";
    display:table;
    visibility:hidden;
    height: 0;
    clear: both;
}
.main-header,.main,.main-footer{
     width: 100%;
}
/*导航栏样式*/
.main-header{
    height: 105px;
    background-color:#fff;
    box-shadow: 0px 2px 6px 2px rgba(73, 50, 50, 0.2);
}
.logo{
    margin: 0px 40px;
    float: left;
    line-height: 105px;
} 
.nav-ul{
    float: right;
}
.nav-li{
    float: left;
    padding-right: 40px;
    font-size: 18px;
    line-height: 105px;
}
.nav-li a{
    color: #000;
}
.nav-li a:visited{
    font-weight:bold;
    text-decoration: underline yellow 6px;
}
.nav-li a:hover{
    font-weight:bold;
    text-decoration: underline yellow 6px;
}
.nav-li a:active{
    font-weight:bold;
    text-decoration: underline yellow 6px;
}
.main-footer{
    background-color: #222;

}
.footer-li{
    height: 20px;
    float: left;
    border-right: 1px solid #999;
    padding: 0 20px;
    margin-top: 30px;
}
.footer-li:first-child{
    margin-left:20px ;
}
.footer-li:last-child{
    border: none;
}
.footer-li a{
    color: #999;
}
.footer-li a:hover{
    color: #fff;
}
.footer-p1{
    color: #999;
    margin: 20px 40px;
}