.leftmenu label {
    width: 20px;
    height: 80px;
    background-color: #d1d1d1;
    color: #686666;
    position: absolute;
    right: -20px;
    top: 0;
    bottom: 0;
    /*margin: auto;*/
    margin-top: 150%;
    /*伺服器端暫定*/
    line-height: 80px;
    text-align: center;
    border-radius: 0 5px 5px 0;
    box-shadow: 5px 0 5px rgba(23, 23, 54, 0.6);
}

#sideMenu-active {
    position: fixed;
    opacity: 0;
    z-index: -1;
}

.leftmenu {
    width: 240px;
    height: 100%;
    position: fixed;
    float: left;
    background-color: #85B8CB;
    border-right: 3px solid #d1d1d1;
    display: flex;
    flex-direction: column;
    padding: 0;
    box-shadow: 5px 0 5px rgba(23, 23, 54, 0.6);
    transform: translateX(-99.5%);
    transition: 0.5s;
}

#sideMenu-active:focus+.leftmenu {
    transform: translateX(0%);
}