body::before{
    clear: both;
    content: "";
    width: 100%;
    height: 70px;
    background: #F7FBFE;
    position: absolute;
    top: 0px;
    left: 0px;
    z-index: -1;
}
.list{
    margin-top: 50px;
}
.list>a{
    border: 1px solid #E2E7EA;
    border-radius: 8px;
    display: block;
    padding: 24px 30px;
    margin-bottom: 16px;
    display: none;
    font-size: 16px;
    font-weight: bold;
    color: #333;
    line-height: 22px;
}
.list>a.active{
    display: block;
}