body, * {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}
ul,ol,li{
    list-style: none;
}
a{
    text-decoration: none;
}
img{
    width: 100%;
    border: 0;
    float: left;
}

/* 头部 */
header{
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: #fff;
    border-bottom: 1px solid #e5e5e5;
}
header .header{
    overflow: hidden;
    width: 1200px;
    min-width: 1200px;
    height: 80px;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
}
header .header div{
    margin-top: -35px;
    width: 200px;
}
header .header ul{
    display: flex;
}
header .header ul li{
    width: 90px;
    line-height: 80px;
    margin-left: 25px;
}
header .header ul li a{
    color: #000000;
    display: block;
    border-radius: 5px;
    text-align: center;
    width: 100%;
    font-size: 18px;
}
header .header ul li:hover{
    border-bottom: 3px solid #ec6917;
}
header .header ul li.active{
    border-bottom: 3px solid #ec6917;
}

/* contact us */
.contact{
    width: 1200px;
    min-width: 1200px;
    overflow: hidden;
    color: #fff;
    padding-bottom: 50px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}
.contact .contact_left{
    width: 522px;
}
.contact .contact_left h3{
    font-size: 24px;
    font-weight: normal;
    padding-top: 50px;
    padding-bottom: 14px;
}
.contact .contact_left em{
    font-style: normal;
    font-size: 18px;
}
.contact .contact_left p{
    font-size: 18px;
    padding: 40px 0;
}
.contact .contact_left ul{
    width: 480px;
    margin: 0;
}
.contact .contact_left ul li{
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
    padding-bottom: 4px;
    line-height: 30px;
}
.contact .contact_left ul li a{
    width: 48px;
}
.contact .contact_left ul li span{
    flex: 1;
}
.contact .contact_right{
    text-align: center;
    font-size: 18px;
    padding-top: 80px;
}
.contact .contact_right span{
    display: block;
    overflow: hidden;
    width: 142px;
    padding-top: 20px;
}
.profile {
    overflow: hidden;
    text-overflow: ellipsis;
}
.profile_nav {
    position: absolute;
    background: #fff;
    display: none;
    box-shadow: 0px 1px 5px 0px rgb(176 176 176 / 50%);
}
.profile_nav dd {
    width: 100px;
    height: 38px;
    line-height: 38px;
    text-align: center;
    cursor: pointer;
}
.profile_nav dd:hover {
    color: #0284FF;
    background: #E6F2FF;
}
.header ul li:hover .profile_nav {
    display: block;
}