body {
    background-image: url("../img/bg.jpg");
    background-size: cover;
    background-repeat: no-repeat;
}
#title {
    position: absolute;
    left: 50%;
    top: 15%;
    width: 1000px;
    height: 0;
    margin-left: -500px;
    margin-top: 0;
    font-family: 'Microsoft YaHei', 'Hiragino Sans GB', 'WenQuanYi Micro Hei', 'SimSun', Arial, sans-serif;
    font-size: 64px;
    color: white;
    text-shadow: 0 0 10px #ffffff;
    text-align: center;
    line-height: 0;
}
#login-div {
    position: absolute;
    left: 50%;
    top: 30%;
    width: 420px;
    height: 350px;
    margin-left: -210px;
    margin-top: 0;
    box-shadow: 1px 1px 2px 0 rgba(0, 0, 0, .75);
}
#login-div .qrcode-div {
    margin: 25px 0 0 0;
    text-align: right;
}
#login-form-container {
    padding: 25px 15px 0 15px;
}