a {
    text-align: center;
    text-decoration: none;
    /*display: flex;*/
    /*margin: 0 80px;*/
    color: rgba(50, 50, 50, 0.5);
}

a:hover {
    color: rgb(55, 128, 255);
}

.a-tips {
    text-align: center;
    text-decoration: none;
    margin-right: 70px;
    color: rgb(73, 97, 147);
}