body {
    background: url("https://image.wjx.com/images/newimg/register-login/bacg.jpg") no-repeat;
    background-size: 100% 100%;
    background-attachment: fixed;
}

#body {
    width: 100%;
    height: 100%;
    font-family: "隶书", "微软雅黑", "新宋体", Arial, sans-serif;
    font-size: 18px;

}

#dv {
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    margin: auto;
    width: 380px;
    height: 250px;
    background: #f44;

}

#container {
    width: 300px;
    height: 200px;
    margin-left: 35px;
    margin-top: 35px;
}

#btn, input {
    width: 300px;
    height: 30px;
}

#btn {
    margin: 15px auto;
    border: 1px solid #333;
    background: #f60;
    cursor: pointer;
    font-size: 1em;
}

#btn:hover {
    background: #f66;
}

input {
    margin-bottom: 40px;
    padding-left: 6px;
}