html,body{
    background-color: #333333;
}
a{
    cursor: pointer;
}
#app{
    background-color: #ffffff;
    width: 460px;
    min-height: 100vh;
    margin: 0 auto;
    position: relative;
}
.tab-btn{
    padding: 1rem 1rem 1.5rem;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    border: 0;
    outline: none !important;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
}
.btn-item{
    margin: 0 0.4rem 1rem;
    -webkit-box-shadow: 0 0 8px 0 #0157b3;
    -moz-box-shadow: 0 0 8px 0 #0157b3;
    box-shadow: 0 0 8px 0 #0157b3;
    -webkit-border-radius: 10px;
    -moz-border-radius: 10px;
    border-radius: 10px;
    overflow: hidden;
    width: calc(100%/4 - 0.4rem * 2);
}
.nav-group{
    position: fixed;
    bottom: 0;
    width: 460px;
    left: calc(50% - 230px);
    font-size: 1.3rem;
    z-index: 2;
}
@media screen and (max-width: 750px){
    #app{
        width: 100%;
    }
    .nav-group{
        width: 100%;
        left: 0;
    }
}
a.d-block{
    margin: -1px 0;
}
.noSelect{
    pointer-events: none !important;
    -webkit-user-drag: none;
    -moz-user-drag: none;
    -ms-user-drag: none;
    user-drag: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}