.header-box {
    height: 100px;
    width: 100%;
    background-color: #fff;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 999;
    border-bottom: 1px solid #ddd;
}

.header {
    height: 100px;
    width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
    display: flex;
    justify-content: space-between;
}

.header-left {
    display: flex;
    padding: 13px 0;
}

.hesder-logo {
    width: 53px;
    height: 55px;
    display: block;
    margin: 10px 28px;
}

.header-line {
    width: 1px;
    height: 74px;
    background: rgba(204, 204, 204, 1);
}

.header-descript {
    font-size: 12px;
    color: #333;
    line-height: 20px;
    padding-left: 39px;
    padding-top: 17px;
}

.header-top {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding-top: 10px;
    position: relative;
}

.header-icon {
    width: 27px;
    height: 27px;
    display: block;
    margin: 0 10px;
}

.header-phone {
    font-size: 18px;
    color:#ff9439;
}

.wx-code{
    display: none;
    position: absolute;
    top: 45px;
    right: 115px;
    z-index: 1;
    width: 100px;
    background: url(../images/background/wx-code-bg.png) center center / cover;
    padding: 15px 6px 5px;
}

.nav {
    height: 50px;
    display: flex;
    margin-top: 26px;
}

.nav>li {
    width: 65px;
    font-size: 16px;
    color: #1a1a1a;
    margin-right: 40px;
    text-align: center;
    position: relative;
}

.nav>li.on>a {
    border-bottom: 4px solid #298EC6;
    width: 65px;
    height: 33px;
    color: #298EC6;
}

.nav>li>a:hover {
    border-bottom: 4px solid #298EC6;
    width: 65px;
    height: 33px;
    color: #298EC6;
}

.nav>li>a {
    color: #1a1a1a;
    display: block;
    width: 65px;
    height: 33px;
    transition: 0.3s ease-in-out;
}

.nav>li:last-child {
    margin-right: 0;
}

.sub-nav{
    display: none;
    flex-direction: column;
    position: absolute;
    top: 40px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #f2f2f2;
    justify-content: space-around;
    padding: 0 20px;
    box-sizing: border-box;
}
.sub-nav>li{
    font-size: 16px;
    color: #1a1a1a;
    display: flex;
    align-items: center;
    cursor: pointer;
    height: 48px;
    border-bottom: 1px solid #ccc;
}
.sub-nav>li:nth-last-child(1){
    border-bottom: none;
}
.sub-nav>li:hover{
    color: #298EC6;
}
.sub-nav>li div{
    width: 40px;
    text-align: left;
}
.sub-nav>li div img{
    height: 20px;
}
.sub-nav>li.sub-on{
    color: #298EC6;
}