body{
    text-align: center;
    background:url("../images/rocket_launch.jpeg");
    background-size: cover;
}

p{
    font-size: 16px;
    color:white;
    font-family: 微软雅黑;
}
.MiniPrag{
    width: 400px;
    height: 400px;
    padding: 13px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -200px;
    margin-top: -200px;
}

.MP{
    width: 337px;
    height: 337px;
    border-radius: 5px;
}