.Box {
    margin: 5px 10px 20px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: calc(100% - 20px);
}
.Introduce {
    margin: 10px;
    color: #64CBFF;
    font-size: 16px;
    line-height: 1.5;
    text-indent: 2em;
    overflow-y: auto;
    height: 46%;
}