body{
    font-family: "Arial","Microsoft YaHei","黑体","宋体",sans-serif;
}
body, html, ul {
    margin: 0;
    padding: 0;
}

image{
    width: 100%;
    height: 100%;
}

.container {
    margin-left: auto;
    margin-right: auto;
    width: 1200px;
    height: 100%;
    display: flex;
    align-items: center;
}

html {
    color: #333333;
}

a {
    text-decoration: none;
    color: #333333;
}

a:hover {
    text-decoration: none;
    color: #c51023;
}

li {

    list-style: none;
}

#top-nav {
    background: #f5f5f5;
    color: #999999;
    height: 36px;
    font-size: 13px;
}

#top-nav .container {
    justify-content: flex-end;
}


#top-nav span{
    position: relative;
}
#top-nav span:hover{
    cursor: pointer;
}
#top-nav span:hover .expand{
    display: block;
}
#top-nav .expand{
    display: none;
    position: absolute;
    width: 170px;
    height: 170px;
    box-sizing: border-box;
    padding: 10px;
    background: #fff;
    border: 1px solid #eee;
    z-index: 100;
}

#top-nav span:nth-last-child(n+2):after {
    padding-left: 10px;
    padding-right: 10px;
    content: '|';
}


/*header*/
#header {
    margin: 25px 0;
    height: 65px;
}

#header .container {
    margin-bottom: 26px;
    margin-top: 26px;
}

#header .container > div {
    width: 100%;
    display: inline-flex;
    justify-content: space-between;
}

#header .logo {
    width: 302px;
}

#header .search {
    width: 360px;
    height: 50px;
    border: 1px solid #c51023;
    position: relative;
}

#header .search input {
    height: 48px;
    line-height: 48px;
    padding-left: 15px;
    font-size: 14px;
    color: #999;
    border: none;
    outline: none;
}

#header .search .search-btn {
    cursor: pointer;
    background-color: #c51023;
    width: 80px;
    height: 50px;
    float: right;
    display: flex;
    justify-content: center;
    align-items: center;

}

/*nav*/
#nav {
    height: 48px;
}

#nav .nav-left {
    height: 100%;
    width: 300px;
    line-height: 100%;
    background: #c51023;
    box-sizing: border-box;
    color: #fff;
}

#nav .nav-left > h3 {
    margin-top: 15px;
    padding-left: 28px;
}
#nav .nav-left:hover{
    cursor: pointer;
}
#nav .nav-left:hover .box{

    display: flex;
}

#nav .nav-right {
    width: 900px;
}

#nav .nav-right>ul {
    font-size: 16px;
    padding-left: 20px;
    box-sizing: border-box;
    width: 100%;
    display: flex;
    justify-content: space-between;
    font-weight: 600;
}

#nav .nav-right>ul>li{
    position: relative;
}
.nav-right>ul>li:hover .children{
    display: block;
}
.children{
    font-weight: 500;
    display: none;
    position: absolute;
    z-index: 10;
    background: #ffffff;
    box-sizing: border-box;
    width: 150px;
    padding: 20px;
    border: 1px solid #eee;
}
.children li{
    padding-bottom: 10px;
}
.children li:last-child{
    padding-bottom: 0;
}
footer{
    margin-top: 100px;
}
#footer {
    box-sizing: border-box;
    padding-top: 75px;
    height: 500px;
    margin-top: -20px;
    background-image: url("../img/bottom-bg.jpg");
    color: #eee;
    text-align: center;
}
#footer p{
    margin-bottom: 36px;
}
#footer p:first-child{
    margin-bottom: 20px;
}

#footer p span{
    display: inline-block;
    width: 200px;
}
.icon-search {
    width: 40px;
    height: 40px;
    background-size: 40px;
    background-image: url("./font/search.svg");
    background-repeat: no-repeat;
}

li{
    list-style: none;
}

.no-flex{
    display: block;
}
.box{
    top:-2px;
    width: 100%;
    height: 500px;
    display: flex;
    position: relative;
    color: #fff;
    z-index: 1000;
}

.box{
    display: none;
}
.box-left{
    width: 300px;
    background: rgba(0,0,0,.6)
}
.box-left>ul{
    margin: 0;
    padding: 0;
}
.box-left .menu{
    margin: 0 20px;
}
.box-left>ul>li:hover{
    background: #c51023;
    cursor: pointer;
}
.box-left>ul>li:hover .right{
    display: block;
}
.box-left>ul>li:hover .menu{
    border-bottom: 1px solid #c51023;
}
.box-left .menu{
    height: 70px;
    padding: 8px 8px;
    box-sizing: border-box;
    border-bottom: 1px solid #666;
}
.box-left .menu h3{
    font-size: 16px;
    font-weight: 500;
    margin: 8px 0 10px;
}
.box-left .menu ul{
    padding: 0;
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: #f2f2f2;
}
.box-left .right{
    color: #333;
    position: absolute;
    top: 0;
    width: 900px;
    background: #f5f5f5;
    margin-left: 300px;
    display: none;
    padding: 20px;
    height: 100%;
    box-sizing: border-box;
}

.banner{
    max-width: 100%;
    text-align:center;
    overflow: hidden;
    position: relative;
}
.banner img{
    margin: 0 auto;
    min-height: 100%;
}