/*
選單線
*/
.line {
    width: 24px;
    height: 24px;
    background: #FFF;
    cursor: pointer;
    display: block;
    padding: 16px;
    position: fixed;
    z-index: 2;
}
.line .menu,
.line .menu::before,
.line .menu::after {
    background: #222;
    content: '';
    display: block;
    height: 1px;
    position: absolute;
    transition: background ease .3s, top ease .3s .3s, transform ease .3s;
    width: 20px;
}
.line .menu {
    left: 18px;
    top: 27px;
}

.line .menu::before {
    top: -6px;
}

.line .menu::after {
    top: 6px;
}
/*
點選選單變叉叉
*/
#menu:checked + .line .menu {
    background: transparent;
}

#menu:checked + .line .menu::before {
    transform: rotate(45deg);
}

#menu:checked + .line .menu::after {
    transform: rotate(-45deg);
}

#menu:checked + .line .menu::before,
#menu:checked + .line .menu::after {
    top: 0;
    transition: top ease .3s, transform ease .3s .3s;
}

/*
選單開合
*/
#menu:checked ~ .menu-list {
    width: 200px;
}

.menu-list {
    width: 60px;
    height: 100vh;
    background: #FFF;
    box-shadow: 0 2px 4px rgba(0, 0, 0, .1);
    padding-top: 60px;
    position: fixed;
    z-index: 1;
    transition: all .6s;
    overflow: hidden;
}
/*
選單向外推
*/
.menu-list ul {
    list-style: none;
    margin-left:70px;
    padding: 0;
}
.menu-list ul>li{
    display:block;
    width:100px;
}
/*
隱藏核許框
*/
input#menu {
 display: none;
}