2019-12-19

    .sidenav {
        background: #ffffff; width: 165px;
        position: absolute; left: 0; top: 0; bottom: 0; padding-top: 100px;
    }
    .sidenav li {list-style-type: none;}
    .sidenav a { color: #222831; text-decoration: none; }
    .sidenav b {
        font: bold 12px/48px Montserrat; display: block;
        opacity: 0; transform: translateX(50px); transition: all 0.4s;
    }
    .sidenav i {
        display: block; width: 50px; float: left; 
        font-size: 16px; line-height: 48px; text-align: center;
    }