body {
    width:100%;
    height:100%;
    background-color: #8ac1f5;
    background-image: url('imgs/background-image.jpg');
    background-repeat: no-repeat;
    background-size: cover;
}

#middle {
    background: rgba(0, 0, 0, 0.2);
    color: rgb(252, 243, 243);
    font-size: medium;
    border-radius: 1rem;
    padding: 1rem;
    position: absolute;
    left: 50%;
    top: 40%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: 40%;
}

#content-middle {
    width: 98%;
}

#content-middle div {
    border-radius: 1rem;
    background: rgba(0, 0, 0, 0.25);
    margin-left: 1%;
    /* border: 1px solid; */
}

#content-middle a {
    text-decoration: none;
    color: white;
}

#content-middle div :hover {
    border-radius: 1rem;
    color: rgb(10, 10, 10);
    background: rgb(255, 255, 255);
}

#beian {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    text-align: center;
    padding: 10px 0;
    background-color: rgba(0, 0, 0, 0.3);
}

#beian a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 12px;
}

#beian a:hover {
    color: #fff;
}