.main {
    padding: 60px;
}

.top {
    margin-bottom: 40px;
    display: flex;
}

.top .tree,
.top .top-content {
    flex: 0 0 45%;
}

.top-right {
    flex: 1 1 100px;
    height: 400px;
   
    background-size: contain;
}

.top .tree {
    /* background: url('../images/about/tree-bg.png') no-repeat; */
    margin-right: 20px;
    height: 400px;
    text-align: center;
    background-size: contain;
}

.top .tree img {
    padding: 0px;
    width: 500px
}

.top .top-content .top-title {
    margin: 30px 0 30px;
}

.top .layui-collapse,
.top .layui-colla-item {
    border-color: transparent;
    border: none;
}

.top .layui-colla-icon {
    opacity: 0;
}

.top .dot {
    position: relative;
    color: #ef8733;
}

.top .dot::before {
    position: absolute;
    content: "";
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #ef8733;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
}

.top .layui-colla-title {
    height: 50px;
    line-height: 22px;
    background: #fff;
    position: relative;
}

.top .layui-colla-title::after {
    position: absolute;
    content: "show";
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
}

.top .layui-colla-title:hover {
    background: #f8e0cc;
}

.top .active-item {
    background: #f8e0cc;
}

.top .layui-colla-title:hover:after {
    opacity: 1;
}

.bottom {
    margin-bottom: 40px;
    text-align: center;
}

.bottom .sub-title {
    color: #666;
}

.content {
    margin-top: 10px;
    display: flex;
    justify-content: space-around;
    text-align: left;
}

.content .item {
    flex: 1;
    color: #000;
    padding: 30px 50px;

    background-size: cover;
    position: relative;
}

.content .item p {
    line-height: 24px;
}

.content .item .tips {
    position: absolute;
    right: 40px;
    bottom: -18px;
    border-radius: 5px;
    padding: 5px 16px;


}