html{
    font-size: calc(100vw / 375);
}

*{
    margin: 0;
    padding: 0;
}

header{
    width: calc(100vw - 40rem);
    height: 40rem;
    font-size: 30px;
    padding: 0 20rem;
    line-height: 40px;
    background-color: rgb(27, 28, 29);
    color: #fff;
    position: fixed;
    top: 0;
}

header>i{
    position: relative;
    top: -5rem;
}

.right{
    width: 180rem;
    height: calc(100vh - 40rem);
    background-color: #fff;
    display: inline-block;
    position: fixed;
    left: -200rem;
    top: 40rem;
    color: rgb(27, 28, 29);
    font-size: 25rem;
    transition: all .3s linear;
}

.nav-item{
    font-size: 17px;
    line-height: 30rem;
    text-align: center;
    color: #000;
    border-bottom: #ccc solid 1rem;
    margin: 4rem 10rem;
    width: calc(100% - 22px);
}


#logo{
    display: inline-block;
    height: 35px;
    line-height: 35px;
}

#logo>img{
    height: 35rem;
    vertical-align: middle;
    position: absolute;
    top: 2rem;
    left: 110rem;
}

footer{
    width: 100vw;
    text-align: right;
    height: 16px;
    line-height: 16px;
    position: fixed;
    bottom: 0;
    left: 0;
    background-color: rgb(27, 28, 29);
    color: #999;
    font-size: 10rem;
}

.disappear-s{
    display: none;
}