* {
    padding: 0;
    margin: 0;
}
canvas {
    margin: 20px;
    border: 2px solid #000;
    background:url(qipan.jpg) no-repeat;
    background-size: 100% 100%;
}
#box {
    display: inline-block;
    position: absolute;
    margin-top: 200px;
    margin-left: 100px;
}
span {
    font: 50px "Arial";
    display: inline-block;
    height: 50px;
}
input {
    margin-top: 50px;
    display: block;
    width: 100px;
    height: 50px;
    font: 23px "Arial";
    color: #fff;
    background-color: #0099cc;
}
background {
    background-image: 'drawing.jpg';
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-size: cover;
}