.all{
    width: 100vw;
    overflow-x: hidden;
    height: 100vh;
    overflow-y: scroll;
    box-sizing: border-box;
    -webkit-overflow-scrolling:touch;
}
.of_logo{
    width: 80%;
    z-index: 1;

}
.of_top em {
    position: absolute;
    top: 50%;
    left: 50%;
    font-size: 3.8vw;
    color: #fff;
    transform: translate(10%, -50%);
    padding-left: 2vw;
    border-left: 1px solid #fff;
    z-index: 99
}

.of_top em img{
    display: inline-block;
    vertical-align: middle;
    width: 10%;
}

.city_motail_box{
    position: absolute;
    top: 0.88rem;
    width: 100%;
    height: 92vh;
    background:rgba(0,0,0,.8);
    z-index: 9999;
    display: none;
}
.city_motail_box ul{
    background-color: #fff;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
.city_motail_box ul li{
    width: 25%;
    text-align: center;
    box-sizing: border-box;
}
.city_motail_box ul li a{
    display: block;
    width: 100%;
    padding: 2vw;
    font-size: 3.5vw;
    color: #fff;
    border-bottom: 1px solid #eee;
    color: #333;
}