#message_box_outside {
    position: fixed;
    top: 100px;
    left: 50%;
    transform: translate(-50%, -50%);
    /* 50%为自身尺寸的一半 */
    z-index: 9999;
}

.message_box_inside {
    margin-top: 10px;
    color: white;
    min-height: 40px;
    min-width: 200px;
    border-radius: 10px;
    text-align: center;
    font-size: 16px;
}

.cc-display {
    justify-content: center;
    align-items: center;
    display: flex;
    display: -webkit-flex;
}