.my_nav_box{
    height: 50px;
    background: #ffffff;
    line-height: 50px;
    box-shadow: #eeeeee 0 5px 5px;
    font-family: NotoSansHans-Light;
    color: #666666;
    font-size: 16px;
    box-sizing: border-box;
    display: none!important;
}
.my_nav_box2{
    position: fixed;
    left: 0;
    top: 116px;
    height: 50px;
    line-height: 50px;
    z-index: 999;
    background: #ffffff;
    box-shadow: #eeeeee 0 5px 5px;
    display: none!important;
    font-family: NotoSansHans-Light;
    color: #666666;
    font-size: 16px;
    box-sizing: border-box;
}
.my_item_box{
    max-width: 950px;
    display: flex;
    margin: 0 auto;
}
.my_item{
    flex: 1;
    font-size: 1em;
    color: #999999;
    text-align: center;
    box-sizing: border-box;
    cursor: pointer;
}
.my_item:hover{
    font-weight: 600;
    color: #00a0ca;
    border-bottom: 4px solid #00a0ca;
}
@media screen and (max-width: 768px){
    .my_nav_box2{
        display: none!important;
    }
}