.nav-main{
    width: 100%;
    height: 100%;
    list-style-type: none;
}
.nav-main span{
    display: inline-block;
    margin-left: 5px;
    width: 15px;
    height: 12px;
}
/*图标向上旋转*/
.hover-up{
    transition-duration: .5s;
    transform: rotate(180deg);
    -webkit-transform: rotate(180deg);
}
/*图标向下旋转*/
.hover-down{
    transition-duration: .5s;
    transform: rotate(0deg);
    -webkit-transform: rotate(0deg);
}
/*导航条设置*/
.nav-main>li{
    width: 120px;
    height: 100%;
    display: block;
    float: left;
    margin-right: 1px;
    cursor: pointer;
}
/*隐藏盒子设置*/
.hidden-box{
    width: 130px;
    border: 1px solid rgb(160, 162, 165);
    border-top: 0;
    position: absolute;
    display: none;
    top: 60px;
}
.hidden-box>ul{
    list-style-type: none;
    color: rgb(160, 162, 165);
    cursor: pointer;
}
/*隐藏盒子位置设置*/
.hidden-loc-index{
    left: -13px;
    background: #fff;
}
.hidden-loc-index li{
    font-size: 14px;
    line-height: 30px;
}
.text-color{
    filter: invert(100%) grayscale(100%) brightness(1000%);
}