.header {
    width: 100%;
    position: relative;
}

.header-top {
    width: 100%;
    height: 70px;
    border-bottom: 2px solid #fff;
}

/* .header-top:hover {
    height: 570px;
    background-color: #fff;
    color: #000;
} */

.header-top:hover a {
    color: black;
}
.top{
    width: 100%;
    height: 160px;
}
.top .top-left{
    float: left;
    width: 37.5%;
}
.top .top-center{
    float: left;
    width: 26%;
    text-align: center;
}
.top .top-right{
    float: left;
    width: 36%;
    text-align: right;
}
.center{
    width: 100%;
    height: 100px;
}
.center .center1{
    float: left;
    width: 37.5%;
}
.center .center2{
    float: left;
    width: 26%;
    text-align: center;
}
.center .center3{
    float: left;
    width: 36%;
    text-align: right;
}
.bottom{
    width: 100%;
    /* height: 140px; */
}
.bottom .right1{
    float: left;
    width: 37.5%;
}
.bottom .right2{
    float: left;
    width: 26%;
    text-align: center;
}
.bottom .right3{
    float: left;
    width: 36%;
    text-align: right;
}
.nav-text h3{
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
}
.nav-text p{
    font-size: 13px;
    line-height: 20px;
    color: #666;
}
.header-top .logo {
    width: 20%;
    height: 52px;
    float: left;
    background: url(../img/logo.svg) no-repeat;
    margin-top: 14px;
}

/* .header-top:hover .nav-item ul {
    display: block;
} */

.nav-banner {
    float: left;
    width: 80%;
    height: 70px;
}

.nav-banner .nav-item .a:hover {
    /* font-size: 16px; */
    color: #174698;
}

.nav-banner .nav-item ul {
    display: none;
}

.nav-banner .nav-item ul li {
    height: 40px;
}

.nav-banner a {
    color: black;
}

.nav-banner .nav-item .a {
    font-size: 14px;
    font-weight: 900;
}

.nav-banner .nav-item ul li:hover .b {
    font-size: 14px;
    color: #174698 !important;
}


#kefu {
	background-image: url(../img/kefu.png);
	background-size: 20px 20px;
	background-repeat: no-repeat;
	text-align: right;
	margin-left: 42%;
	background-position: 0 25px;
}

#kefu a {
	display: inline-block;
	margin-left: 61%;
}

.tab {
    width: 100%;
    height: 60px;
    background: #F7F8F9;
    line-height: 60px;
    box-shadow: 0px 2px 2px 0 rgba(172, 172, 172, 0.5);
}

.tab ul {
    width: 100%;
    height: 60px;
}

.tab ul li {
    /* padding-right: 67px; */
    height: 60px;
    float: left;
    font-size: 16px;
    color: #6666;
    line-height: 60px;
}

.nav-content {
    width: 100%;
    /* height: 900px; */
}

.nav-content .nav-top ul {
    height: 300px;
    padding: 40px 0;
}

.nav-content .nav-top ul li {
    float: left;
    width: 22%;
	margin: 0 2%;
    height: 300px;
    background: #FFFFFF;
    box-shadow: 6px 8px 18px 0px rgba(203, 199, 199, 0.5), -1px 3px 19px 0px rgba(216, 216, 216, 0.5);
    text-align: center;
}
.nav-content .nav-top ul li img{
    margin-top: 40px;
}

.nav-content .nav-top ul li:nth-child(2) {
    margin: 0 13%;
}

.nav-content .nav-text {
    width: 100%;
    margin-top: 60px;
    line-height: 30px;
	box-sizing: border-box;
	padding: 0 1%;
}