.top-image {
    width: 100%;
    height: 648px;
    background: url('../images/introduce.png') center no-repeat;
    background-size: 1920px 648px;
}

.main {
    padding-top: 100px;
}

.introduce-item {
    margin-bottom: 100px;
    display: flex;
    align-items: center;
    position: relative;
}

.introduce-item .back-block {
    position: absolute;
    content: ' ';
    left: 0;
    right: 0;
    top: 56px;
    bottom: 56px;
    z-index: -1;
}

.introduce-item:nth-child(odd) {
    padding-left: 80px;
}

.introduce-item:nth-child(even) {
    padding-right: 80px;
}

.introduce-item .image {
    width: 320px;
    height: 480px;
    border-radius: 20px;
    overflow: hidden;
    display: block;
}

.introduce-item .text-box {
    margin: 0 60px;
    color: #666666;
    max-width: 666px;
}

.introduce-item .title {
    font-family: PingFangSC-Medium;
    font-size: 20px;
}

.introduce-item .text {
    font-family: PingFangSC-Regular;
    font-size: 18px;
    margin-top: 20px;
    line-height: 40px;
}