html,body{
    width:100%;
}
.fade-enter-active,
.fade-leave-active {
    transition: opacity .5s ease;
}

.fade-enter,
.fade-leave-active {
    opacity: 0
}

h4 {
    margin: 20px 0 10px;
}

.demo-list {
    padding-left: 0;
    padding-right: 0;
    overflow: hidden;
    h4 {
        padding: 0 8px;
        box-sizing: border-box;
    }
}

p {
    font-size: 12px;
    margin: 5px 10px;
    color: #666;
}