@charset "utf-8";
header .li-1 {
    position: relative;
    margin-right: 60px;
}
header .li-1:last-of-type {
    margin-right: 0;
}
header .nav-a {
    display: inline-block;
    height: 80px;
    line-height: 80px;
    font-weight: 200;
    font-size: 18px;
    color: #fff;
    transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    -webkit-transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}
header .drop {
    position: absolute;
    left: 50%;
    top: 100%;
    transform: translateX(-50%);
    text-align: center;
    background-color: #fff;
    box-shadow: 0px 0px 12px 1px rgba(0, 0, 0, 0.1);
    display: none;
}
header .drop .item {
    display: block;
    padding: 10px 30px;
    white-space: nowrap;
    transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
    -webkit-transition: 0.5s cubic-bezier(0.65, 0, 0.35, 1);
}
header .drop .item:hover {
    color: #00A7BB;
}
header .drop a {
    position: relative;
    display: block;
    height: 40px;
    line-height: 40px;
}
header.on {
    background-color: #fff;
    box-shadow: 0px 0px 12px 1px rgba(0, 0, 0, 0.1);
}
header.on .li-1.active .nav-a {
    color: #00A7BB !important;
}
header.on .nav-a {
    color: #666666;
}
header.on .logo1 {
    opacity: 0;
    visibility: hidden;
}
header.on .logo2 {
    opacity: 1;
    visibility: visible;
}
header.on .lang {
    color: #fff;
    background-color: #00A7BB;
}

@media only screen and (max-width: 1680px) {
header .li-1 {
    margin-right: 50px;
}
.search-box .sea-form,  .search-box .submit {
    height: 70px;
    line-height: 70px;
}
}

@media only screen and (max-width: 1440px) {
header {
    height: 76px;
    padding: 0 3.2% 0 3.3%;
}
header .li-1 {
    margin-right: 40px;
}
header .nav-a {
    height: 76px;
    line-height: 76px;
    font-size: 16px;
}
header .sousuo i {
    font-size: 17px;
    margin-right: 10px;
}
header .lang {
    padding: 5px 13px;
    margin-left: 20px;
}
header .drop .item {
    font-size: 14px;
    padding: 8px 25px;
}
}

@media only screen and (max-width: 1280px) {
header .li-1 {
    margin-right: 30px;
}
header .sousuo i {
    font-size: 16px;
    margin-right: 6px;
}
header .lang {
    margin-left: 15px;
}
}