#home {
	opacity: 0.85;
	margin: 0 auto;
	width: 90%;
	min-width: 950px;
	padding: 30px;
	margin-top: 30px;
	margin-bottom: 50px;
	box-shadow: 0 2px 6px rgba(100, 100, 100, 0.3);
}
body {
background: url(https://images.cnblogs.com/cnblogs_com/hsez-cyx/1636718/o_200407035115QQ%E5%9B%BE%E7%89%8720200407114759.jpg) fixed;

background-size: cover;

background-repeat: no-repeat;
}