.center-btn {
    margin: 30px auto 0;
    text-align: center;
}

.center-btn a {
    background-color: #ff4f00;
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
}

.explain {
    margin: 15px 15px 20px;
}

.entering-content {
    padding-bottom: 50px;
}