body, ul, li ,p {
    padding: 0;
    margin: 0;
    list-style: none;
}
body {
    background: #333;
}
.wrapper {
    width: 360px;
    margin: 100px auto;
    border-radius: 4px;
    background: #fff;
}
.item {
    border-bottom: 1px solid #ccc;
}
.item:nth-child(3) {
    border-bottom: 0;
}
.item ul {
    display: none;
}
.title {
    position: relative;
    padding: 15px 40px;
}
.title .iconfont {
    position: absolute;
    top: 50%;
    margin-top: -8px;
}
.title .iconfont:nth-child(1) {
    left: 15px;
}
.title .iconfont:nth-child(2) {
    right: 15px;
    transition: transform 0.3s ease;
}
.item ul {
    background: #888;
}
.item a {
    display: block;
    padding: 10px 40px;
    color: #eee;
    text-decoration: none;
}
.item a:hover {
    background: #b63b4d;
}
.active .title{
    color: #b63b4d;
}
.active .icon-jiantouxia {
    transform: rotate(180deg);
}