body {
    background-image: url(https://imgapi.cn/api.php?zd=zsy&fl=meizi&gs=images);
}

h1 {
    text-align: center;
    font-family: Microsoft YaHei;
}

.form-posation {
    width: 450px;
    height: auto;
    position: fixed;
    left: 50%;
    top: 50%;
    margin-top: -150px !important;
    margin-left: -225px;
    border-radius: 5px;
    padding-bottom: 20px;
    background-color:#fff;
}



.form-username {
    width: 300px;
    height: 30px;
    font-size: 18px;
    line-height: 30px;
    padding: 0 5px;
    border: 1px solid #ff0000;
    display: block;
    margin: 50px auto;
}


.form-pwd {
    width: 300px;
    height: 30px;
    font-size: 18px;
    line-height: 30px;
    padding: 0 5px;
    border: 1px solid #ff0000;
    display: block;
    margin: 50px auto;
}

.form-login {
    background: rgb(180, 50, 9);
    border: none;
    border-radius: 15px;
    padding: 10px 50px;
    font-size: 20px;
    color: #ffffff;
    display: block;
    margin: 50px auto;
}

.beian {
    text-align: center;
    position: fixed;
    bottom: 0px;
    left: 0;
    right: 0;
    margin: 0 auto;
}