#topNav {
    background-color: #fff;
    height: 48px;
    line-height: 48px;
    border-bottom: 1px solid #bfbfbf;
    display: flex;
    overflow-x: auto;
    scroll-behavior: smooth;
    /* padding: 10px 0; */
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.mainNav {
    zoom: 1;
    clear: both;
}
.mainNav {
    display: flex;
    list-style: none;
    padding: 0 15px;
    min-width: min-content;
    zoom: 1;
    overflow-x: auto !important;
    overflow-y: hidden !important;
}
#topNav li {
    padding: 0;
    float: left;
    color: #333;
    text-align: center;
    flex-shrink: 0;
    margin-right: 12px;
    width: auto; !important;

}
.mainNav li a {
    display: block;
    text-align: center;
    position: relative;
    font-size: 14px;
}
#topNav li a {
    height: 40px;
    line-height: 40px;
}
.mainNav .cur a {
    color: #5ca8f6;
    font-weight: 600;
}