header{
    width: 100%;
    display: flex;
    justify-content:space-between;
    position: fixed;
    top: 0px;
    left: 0px;
    background: #fff;
    z-index: 9999;
}
.p-h-img{
    height: 100px;
    padding-left: 20px;
    display: flex;
    align-items:center;
}
/*µ¼º½*/
nav{
    display: flex;
    padding-right: 20px;
    align-items:center;
}
nav>li{
    padding: 0px 20px;
    border-right: 1px solid #ccc;
    position:relative;
    height: 24px;
}
nav .n-sj-r{
    padding: 0px 20px 40px 0px;
}

nav>li:last-child{
    border-right: 0;
}
nav>li:nth-child(2){
    padding: 0px 38px 0px 20px;
    display: relative;
}
nav>li:nth-child(2)::after{
    position: absolute;
	top:8px;
	right:14px;
	content:'';
	border:4px solid transparent;
	border-top:6px solid #999;
}
nav>li:nth-child(2):hover::after{
    border-top:0;
	border-bottom:6px solid #999;
}
nav>li>ul{
    width:260px;
    background: #fff;
    position: absolute;
    left:0px;
    top:24px;
    padding: 20px 0px;
    display: none;
}
nav>li:nth-child(2):hover ul{
    display:block;
}
nav>li>ul>li{
    height: 30px;
    padding-left: 20px;
}
/*ͼ*/
.benner{
    width: 100%;
    background: #F4F4F4;
    display: flex;
    margin-top: 100px;
}
.benner img{
    width: 100%;
    margin: auto;
}