body{padding:0;border:0; margin:0;font-size: 14px;font-weight: normal;color: #333333;}
div,form,img,ul,ol,li,dl,i,u,span,dt,dd,em,i,h1,h2,h3,h4,p{ padding:0; border:0;margin:0;list-style:none;font-style:normal;}
a{text-decoration:none; color:#333; outline:none; cursor:pointer}
a:hover{ text-decoration: none;}
ul,li{list-style: none}
h2,h3{text-overflow: ellipsis; white-space: normal; font-weight: normal;}
img{vertical-align: bottom;}

/*wrap*/
.box,header{margin: auto; max-width: 1920px; min-width: 1200px; }
.mt60{ margin-top: 60px; }
.mb60{ margin-bottom: 60px; }
.mt40{ margin-top:40px;}
.mb40{ margin-bottom: 40px;}
.mt30{ margin-top:30px;}
.mb30{ margin-bottom:30px;}
.pb30{ padding-bottom:30px; }
.pd20{padding: 20px;}
.pb40{ padding-bottom:40px; }
.pb60{ padding-bottom:60px; }
.wrap{padding-left:5%;padding-right:5%;clear:both; box-sizing: border-box;min-width: 1300px}
.flex{display: flex; flex-wrap: wrap}
.flex-justify{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}
.flex-justify-center{
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}
.flex-justify-around{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}
.flex-center{
    display: flex;
    flex-wrap: wrap;
    justify-items: center;
    align-items: center;
}
.no-word{
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/*header*/
header{
    align-items: center;
    box-sizing:border-box;
    justify-content: space-between;
    height: 80px;
    background:url(/images/header_bg.jpg) no-repeat center center;
} 
header h1{
    width: 280px;
}
header h1 img{
    width: 100%;
}
.main_box{
    position: relative;
}
.main_nav {
    box-sizing:border-box;
    width: fit-content;
    height: 100%;
    z-index: 999999;
}
.main_nav > li > a{
    display: block;
    width: 100px;
    height: 100%;
    font-size: 16px;
    font-weight: bold;
    color: #555555;
    text-align: center;
    line-height: 80px;
    position: relative;
    z-index: 999;
}
.main_nav > li{position: relative; margin-left:5px;height: 100%}
.nav-close{position: absolute; top: 14px;right: 20px;}
.nav-close .iconfont{ font-size: 25px; color:#a0a0a0;}
.nav-button{display: none;position: absolute;right: 10px;color: #0074C5; }
.phone-nav{
    overflow: auto;
    position: fixed;
    top: 0;
    left: -100%;
    z-index: 9999;
    width: 100%;
    height: 100%;
    background: #fff;
    transition: all .5s;
}
.phone-nav > ul{overflow: hidden; width: 100%; }
.phone-nav > ul > li{
    position: relative;
    padding-left: 18px;
    width: 100%;
    font-size: 18px;
    box-sizing: border-box;
    border-bottom: 1px solid #f1f1f1;
}
.phone-nav > ul > li:nth-child(1){border-bottom: 1px solid #ddd;}
.nav_active,.main_nav > li > a:hover{ 
   color: #0074c5!important
}
.nav_active > a,.nav_active .iconfont{ color: #fff!important; }
.nav_active > a{ padding: 15px 0 15px 10px!important; }
.phone-nav > ul > li > a{
    display: inline-block;
    padding: 15px 0;
    width: calc(100% - 90px);
    box-sizing: border-box;
    color: #1B4A9C;
}
.sub_nav_icon{
    width: 70px;
    line-height: 55px;
    height: 55px;
    text-align: center;
    border-left: 1px solid #f1f1f1;
}
.sub_nav_icon .iconfont{
    font-size: 18px;
    color: #1B4A9C;
}
.sub_nav_show {
    display: none;
    padding:0 15px;
    width: 100%;
    box-sizing: border-box;
    font-size: 16px;
    background: #f1f1f1;
}
.sub_nav_show li{
    padding: 10px 0; 
}
.phone-nav > ul > li.cur .sub_nav_show{
    display: block;
}


/*导航下拉*/
.main_nav > li:hover .sub_nav{display: block }
.sub_nav{
    display: none; 
    overflow: hidden;
    position: absolute;
    top: 80px;
    left: 0;
    box-sizing: border-box;
    width: 200px;
    height: auto;
    background: rgba(255,255,255,.85); /*#1B4A9C*/;
    /*border-top: 3px solid #007EC8;*/
    z-index: 99;
    zoom: 1;
    clear: both;
    -webkit-transition: all 0.4s;
    -moz-transition: all 0.4s;
    -ms-transition: all 0.4s;
    -o-transition: all 0.4s;
    transition: all 0.4s;
}
.sub_nav ul{
    width: 100%;
    border-top:1px solid #e5e5e5;
}
.sub_nav a{ color: #333 }
.sub_nav_list li{
    position: relative;
    width: 100%;
    border-bottom: 1px solid #e5e5e5;
}
.sub_nav_list a{
    position: relative; 
    display:block;
    overflow: hidden;
    padding:14px 20px;
    box-sizing: border-box;
    width: 100%;
    color: #666;
}
.sub_nav_list a i{
    display: inline-block;
    width: 20px;
}
.sub_nav_list a:hover {
    background: #1A87D3;
    color: #fff;
}

/*底部*/
footer{
    padding: 30px 0;
    position: relative;
    box-sizing: border-box;
    background: #F8F8F8;
    color: #666;
    line-height: 25px;
}
.footer_nav{ 
    width: 70%;
}
.footer_ewm{
    width: 12%;
}
.footer_nav li{
    width: 10%;
}
.footer_nav li:nth-child(5){
    width: 35%;
    line-height:25px;
}
.footer_nav li a{
    display: block;
    padding-bottom: 5px;
    color: #666;
}
.footer_nav li a:nth-child(1){
    margin-bottom: 15px;
    padding: 0;
    font-size: 18px;
    font-weight: bold;
    color: #333;
}
.footer_ewm img{ width: 100%; }
.footer_bottom{padding-top: 2px;box-sizing: border-box; height: 50px; line-height: 50px;color: #666;background:#ECECEC;}
.footer_bottom a{ color: #666; }

/*返回顶部按钮*/
.backtop{
    position: fixed;
    bottom:60px; 
    right: 10px; 
    display: none; 
    z-index:999;
    width:36px; 
    height:36px; 
    background:rgba(0,0,0,0.4);
    color: #fff;
    border-radius: 50%;
    cursor:pointer;
}
.backtop .iconfont{
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
}

/*手机底部按钮*/
.mfoot{display:none;width:100%; height:auto; margin:0 auto;background: rgba(0,0,0,.8);position:fixed; z-index:900; bottom:0;}
.mfoot-li{width:25%;float:left;}
.mfoot-li span{font-size: 25px;}
.mfoot-li a{display:block;width:100%;text-align:center;color:#FFF;}
.mfoot-li a p{line-height:18px; text-align: center;}
.mfoot-li a img {width:30px;vertical-align:middle;}

/*媒体查询*/
@media (max-width:1920px) and (min-width:1700px) {
    .wrap{ padding-left:17%; padding-right:17% ; }
    .main_nav { right: 17%;}
    .main_box {width: calc(100% - 22%);}
}
@media (max-width:1200px ) and (min-width:991px){
    .phone-nav{display: none!important;}
}
/*@media (max-width:991px ) and (min-width:770px){
    .main_box{width: calc(100% - 80%);}
    .box,header,.footer_nav li,.footer_nav{ min-width: 100%; }
    .mt40,.mt60{margin-top: 20px;}
    .mb40,.mb30,.mb60{ margin-bottom: 20px;}
    .mt30 {margin-top: 15px;}
    .wrap{padding-left:3%;padding-right:3%;}
    .main_nav,.footer_text,.footer_nav li{display: none;}
    .nav-button{display: block;}
    .nav-button{padding-top: 40px;}
    header{height: 60px}
    header h1{ width: 200px }
    .footer_bottom {height: 70px;line-height: 20px;}
    footer {padding: 20px 0;}
    .footer_nav li:nth-child(5){ display: block; width: 100%; }
    .footer_ewm{ width: 38%; margin-top: 20px; }
}*/
@media (max-width:650px) and (min-width:320px) {
    .box,header,.footer_nav li,.footer_nav{ min-width: 100%; }
    .mt40,.mt60{margin-top: 20px;}
    .mb40,.mb30,.mb60{ margin-bottom: 20px;}
    .mt30 {margin-top: 15px;}
    .wrap{padding-left:3%;padding-right:3%;width: 100%; min-width: unset;}
    .main_nav,.footer_nav li{display: none;}
    .nav-button{display: block;}
    header{height: 60px}
    header h1{ width: 200px }
    .footer_bottom {height: 70px;line-height: 20px;}
    footer {padding: 20px 0;}
    .footer_contact{ margin-top: 20px }
    .main_box {width: calc(100% - 80%);}
    .footer_nav li:nth-child(5){ display: block; width: 100%; }
    .footer_ewm{ width: 38%; margin-top: 20px; }
}