html_网格背景

body {
    background: url(bk.png);
    background-image: url(bk.png);
    background-position-x: initial;
    background-position-y: initial;
    background-size: initial;
    background-repeat-x: initial;
    background-repeat-y: initial;
    background-attachment: initial;
    background-origin: initial;
    background-clip: initial;
    background-color: initial;
}