html, body {
    background-image: url(https://comet.noonspace.com/w51/mubot/MsgInfo/mubot_bg2.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}
#id_Content {
    /* padding-left: 20px; */
    /* padding-right: 20px; */
    position: absolute;
    top: 0;
    right: 0;
    font-size: 20px;
    font-weight: bold;
    background: rgba(0, 188, 212, 0.81);
    width: 100%;
    max-width: 570px;
    padding-top: 10vh;
    vertical-align: middle;
    box-sizing: border-box;
}