.headnav {
    height: 80px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    position: relative;
    z-index: 10;
}

.headnav_main {
    display: flex;
    height: 80px;
    justify-content: space-between;
    align-items: center;
}

.headnav .logo {
    width: 180px;
    height: 48px;
    display: block;
}

.headnav .headnav_list {
    flex: 1;
    display: flex;
    height: 100%;
    justify-content: center;
}

.headnav .headnav_list .nav_item {
    color: #ffffff;
    padding: 0 15px;
    font-size: 16px;
    font-weight: 400;
    margin-right: 42px;
    position: relative;
    height: 100%;
    line-height: 80px;
}

.headnav .headnav_list .nav_item:last-child {
    margin-right: 0
}

.active_nav::after{
    content: '';
    width: 60px;
    height: 4px;
    background-color: #ffffff;
    position: absolute;
    bottom: 0;
    left: calc(50% - 30px);
}

.login_btn a{
    display: block;
    width: 164px;
    height: 50px;
    color: #ffffff;
    background-color: rgba(0, 0, 0, 0.2);
    text-align: center;
    line-height: 50px;
    font-size: 18px;
    font-weight: bold;
    border-radius: 25px;
}