* {
    margin: 0;
    padding: 0;
}

li {
    list-style: none;
}

header {
    position: fixed;
    top: 0;
    height: 6vh;
    width: 100vw;
    background: darkcyan;
    text-align: center;
}

footer {
    position: fixed;
    bottom: 0;
    height: 6vh;
    width: 100vw;
    background: darkcyan;
    text-align: center;
}

.content {
    height: 88vh;
    position: fixed;
    top: 6vh;
    bottom: 6vh;
    background-color: pink;
    width: 100vw;
}

.content .left {
    width: 30vw;
    position: fixed;
    top: 6vh;
    bottom: 6vh;
    left: 0;
    background-color: lightgreen;
    height: 88vh;
    overflow: hidden;
    overflow-y: auto;
    text-align: center;
    transition: all .2s;
    font-weight: bold;
}

.content .left li {
    padding: 10px 0;
}

.content .right {
    background-color: lightblue;
    width: 70vw;
    position: fixed;
    top: 6vh;
    bottom: 6vh;
    right: 0;
    display: flex;
    flex-wrap: wrap;
    overflow: hidden;
    overflow-y: auto;
    transition: all .2s;
}

.content .right li {
    width: 33.333%;
    text-align: center;
    font-weight: bold;
    padding: 15px 0;
}

.content .right li .iconfont {
    font-size: 36px;
    height: 36px;
    display: block;
    margin-bottom: 5px;
}

.icon {
    width: 37px;
    height: 36px;
}