body {
    font: 1.6rem Helvetica;
    height: 100vh;
    margin: 0;
    background-color: #333333EE;
}
.content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    height: 100%;
    padding-bottom: 2rem;
}
.center {
    margin-bottom: 20%;
}
.title {
    font-size: 2rem;
    color: #ffffff;
    margin-bottom: 1rem;
}
.mywechat {
    width: 11rem;
    /* height: 8rem; */
}