body {
	background: url("https://images.cnblogs.com/cnblogs_com/bluemiaomiao/1507446/o_bg.png") repeat;
}
.my-index-header {
	background: url("https://images.cnblogs.com/cnblogs_com/bluemiaomiao/1507446/o_header.png") no-repeat;
	width: 100%;
	height: 75px;
        background-size: cover;
        margin-bottom: -50px;
}