header{background: #fff;}
.header_t{width: 720px;margin: auto;padding-top: 20px;}
.header_t img{width: 100%;}
.header_top {color: #fff; background: #245399;height: 50px;line-height: 50px; font-size: 16px;}
.secrch-box{position:relative;}
.secrch-input{width:200px;border-radius:40px;height:30px;font-size:14px;opacity:0.8;display:inline-block;}
.search-btn{width:30px;height:30px;border-radius:50%;background:#fff;opacity:0.8;display:inline-block;margin-left:10px;    position: relative;top: 10px;}
.header_top a{color: white;}
.header_top  a:hover{color: white;}
.shu{padding: 0px 10px;}
.jd_header_right{text-align: right;}
.header_bottom {
    width: 100%;
    height: 290px;
    background: url('../image/nav_bg.png') no-repeat bottom;
    border-bottom: 4px solid #245399;
}
.nav {
    width: 100%;
    height:180px;
}
.logo-text-box {
    width: 723px;
    margin: auto;
    position: relative;
    top: 5px;
}
.logo-text-box img{width:100%;}
.logo_box{position:relative;top:-40px;    left: 18px;}
.nav li a {
    color: #333333;
    display: block;
    height:75px;
    font-size: 20px;
    letter-spacing: 2px;
}
.xian_xz{position:absolute;bottom:137px;}
.xian_xz img{width:100%;}
.nav  .layui-icon{font-size: 22px;padding-right: 5px;}
.nav li:last-child{margin-right: 0px;}
.nav li:first-child{margin-left: 0px;}
.nav span{float: left;line-height: 70px;color: white;font-weight: 700;font-size: 22px;}
.text-cn {
    font-size: 18px;
    position: relative;
    top: 5px;
    color: #494949;
    width:1000px;
    margin:auto;
    display:flex;
    justify-content:space-between;
}
.text-cn span{display:inline-block;}
footer {
    background: #F4F4F4;
    width: 100%;
    padding-top: 40px;
    height:30px;
    padding-bottom: 30px;
    color: #666666;
    line-height: 30px;
}
footer p{text-align:center;font-size:18px;}
.quanwei{margin: auto;}


.nav li {
    float: left;
    line-height: 90px;
    color: white;
    font-size: 18px;
    margin: 0px 27px;
    padding: 0 15px;
    transition: All 0.4s ease-in-out;
}

    .nav li:hover a {
        border-bottom:3px solid #245399;
    }

.this_nav {
    background: linear-gradient(#268ece, #126aa2);
    transition: All 0.4s ease-in-out;
}