body {
    background: #5c1e1e;
    position: relative;
    font-family: SimHei, STHeiti;
}

#box {
    border-radius: 15px;
    background: #e05b5b;
    box-shadow: 0px 0px 13px 6px #c34c4c;
    width: 406px;
    height: 314px;
    flex-shrink: 0;

    position: relative;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

#timebox {
    border-radius: 5px;
    background: #ff7e7e;
    position: absolute;

    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    width: 272px;
    height: 89px;

    flex-shrink: 0;
    border-radius: 15px;
    box-shadow: 0px 0px 13px 6px #b84e4e;
}