.top_nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #fff;
    padding: 0 35px;
    z-index: 99;
    display: flex;
}

.top_nav .logo {
    width: 75px;
    display: flex;
    align-items: center;
    padding: 20px 0;
}

.top_nav .logo img{
    width: auto;
    max-width: 100%;
}

.top_nav .operation {
    display: flex;
    align-items: center;
    margin-left: 2vw;
}

.top_nav .operation .search {
    height: 22px;
    cursor: pointer;
    position: relative;
}

.top_nav .operation .search svg {
    width: 100%;
    height: 100%;
    fill: #afafaf;
}

.search .input {
    position: absolute;
    height: 55px;
    padding-top: 5px;
    right: -10px;
    transform-origin: right;
    transform: scale(0, 1);
    width: 250px;
    transition: .3s;
    z-index: 99;
    bottom: -51px;
}

.search .input input {
    display: block;
    height: 50px;
    padding: 10px 0;
    line-height: 30px;
    border-radius: 50px;
    background: #fff;
    box-shadow: 1px 1px 5px #ccc;
    outline: 0;
    border: 0;
    text-indent: 20px;
    width: 100%;
    font-size: 14px;
}

.top_nav .top_lk_box {
    width: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-left: 3%;
}

.head_nav {
    width: calc(95% - 165px);
}

.head_nav ul {
    display: flex;
    width: 100%;
    max-width: 931px;
    margin-left: auto;
    align-items: center;
    justify-content: space-between;
}

.head_nav ul>li .nav_yj_t {
    color: #222;
    font-size: 16px;
    text-align: center;
    display:block;
    line-height: 98px;
    height: 98px;
    font-weight: 600;
    position: relative;
}

.head_nav ul>li .nav_yj_t:after {
    position: absolute;
    left: 0;
    width: 100%;
    display: block;
    transform: scale(0, 1);
    content: '';
    height: 4px;
    bottom: 0;
    border-radius: 5px;
    transition: 0.3s;
}

.head_nav ul>li:hover .nav_yj_t:after {
    transform: scale(1, 1);
    background: #a4a4a4;
}

.second_menu {
    position: absolute;
    width: 100%;
    padding: 2vw 0;
    left: 0%;
    background:rgba(38 98 174 / 98%);
    display: none;
    top: 100%;
    height: auto;
}

.secBox{
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
}

.sec_lr {
    width: 30%;
    display: flex;
    align-items: center;
}

.sec_ri {
    flex: 1;
    margin-left: 3%;
}

a.sec_lr_t {
    color: #fff;
    line-height: 1.2;
    font-size: 36px;
    font-family: 'Montserrat-SemiBold';
}

.sec_lr i {
    flex: 1;
    height: 1px;
    background: rgba(255 255 255 / 50%);
    margin-left: 2vw;
    max-width: 160px;
}

.sec_ri .nav2tit{
    line-height: 38px;
    display: block;
    color: #fff;
    font-size: 16px;
    transition: all .5s;
    position: relative;
    text-align: left;
    width: fit-content;
    opacity: 0.7;
}

.nav2tit:before {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0%;
    height: 1px;
    background-color: #0050a1;
    transition: all .5s;
}

.nav2tit:hover:before {
    width: 0%;
}

.nav2tit:hover {
    opacity: 1;
}

@media only screen and (max-width: 1024px) {

    .top_nav{
        display: none;
    }
    
    .index_menu .bottom{
        display: none;
    }
    
    .second_menu{
        background: transparent;
    }
    
}