.main{
    margin:30px;
}
.main .wrapper{
    display:flex;
    justify-content:space-around;
}
/* 左部分 */
.left-part{
    width:220px;
    border-top-left-radius:20px;
    border-top-right-radius:20px;
    margin-top:50px;
}
.left-title{
    height:55px;
    line-height:55px;
    background-color:#A33131;
    border-top-left-radius:20px;
    border-top-right-radius:20px;
    border:1px solid #A33131;
    color:#fff;
}
.left-item{
    min-height:55px;
    line-height:55px;
    border-left:1px solid #A33131;
    border-right:1px solid #A33131;
    border-bottom:1px solid #A33131;
    overflow:visible
}
.left-item:hover{
    background-color:#A33131;
}

.second-list {
    display: none;
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px dashed #d1a0a0;
}

.left-item.active .second-list {
    display: block;
    animation: fadeIn 0.3s ease-in-out;
}

.second-item {
    height: 55px;
    line-height: 55px;
    padding-left: 40px;
    background-color: #fff;
    transition: background-color 0.2s;
}

.second-item a {
    display: block; 
    width: 100%;
    height: 100%;
    color: #333; 
    text-decoration: none;
    font-size: 14px;
}

.second-item:hover {
    background-color: #A33131;
}

.second-item:hover a {
    color: #fff;
}

.second-item .second-list {
    border-left: 2px solid #d1a0a0;
    margin-left: 10px; 
}

.second-item .second-item {
    padding-left: 60px;
}

.ej-item {
    position: relative;
    padding-right: 30px;
}

.left-item.active .ej-item:after {
    transform: translateY(-50%) rotate(180deg);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ej-item:after {
    content: "";
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid currentColor;
    margin-left: 10px;
    vertical-align: middle;
    transition: transform 0.3s;
}

.left-item.active .ej-item:after {
    transform: rotate(180deg);
}
/* 右部分 */
.right-part{
    width:900px;
    display:flex;
    flex-direction:column;
}
.right-title{
    text-align:left;
    font-size:20px;
    font-weight:700;
    margin:20px 0;
}
.right-title span:before{
    content: '|';
    margin: 0 10px;
    color: #c32e2e;
}
.right-list{
    text-align:left;
}
.right-list li{
    height:50px;
    line-height:50px;
}
.right-list li a{
    display:flex;
    justify-content:space-between;
}
.right-list li a:hover{
    color:#A33131;
}
.tag{
    color:#A33131;
    margin-right:10px;
}