html, body {
    padding: 0;
    margin: 0;
}

a {
    text-decoration: none;
}

.main {
    background: #F5F5F5;
}

.header {
    height: 52px;
    background-color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.header a {
    display: flex;
    align-items: center;
    margin: 0 18px;
    width: 30px;
}

.header .title {
    font-size: 18px;
    font-family: PingFangSC-Medium, PingFang SC;
    font-weight: 500;
    color: #333333;
}

.header .back img {
    width: 30px;
}

.header .share img {
    width: 30px;
}

.content {
    padding: 20px;
}