main {
    position: relative;
    font-family: Lato, "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 15px;
    line-height: 2;
    color: #555;
    background: #fff;
}

.about {
    padding-bottom: 150px;
    margin-top: 3rem;
}

.main-inner {
    margin: 0 auto;
    width: 700px;
}

.content-wrap {
    padding-top: 40px;
}

.about-link {
    padding-bottom: 1px;
    border-bottom: 1px solid #333;
}