footer{
    width: 100%;
    height: 100px;
    background-color:#333;
    margin-top: 50px;
    font-size: 12px;
}
.beian{
    width: 100%;  
    text-align: center;
    padding-top: 25px;

}
.beian p{
    color: rgb(170, 170, 170);
    font-size: 12px;
}
.jishu{
    width: 100%;
    margin-top: 15px;
    text-align: center; 
    font-size: 12px;
}
.jishu a{
    color: rgb(170, 170, 170);
    text-decoration: none;
}
@media screen and (max-width: 450px)  {
    .beian p {
        color: rgb(170, 170, 170);
        font-size: 12px;
        padding-left: 10px;
        padding-right: 10px;
    }
}