body{
     background-image: url(https://images.cnblogs.com/cnblogs_com/Sonya/1599198/o_191124161115%E8%83%8C%E6%99%AF.png);
     background-size: 100%;
	background-repeat: no-repeat;
	background-attachment: fixed;
     background-color:rgba(0,0,0,.4);
}
#home {
​	 margin: 0 auto;
​    	width: 90%;
   	min-width: 950px;
​    	background-color: #fff;
        opacity:0.7;
​    	padding: 30px;
   	margin-top: 50px;
   	margin-bottom: 50px;
   	box-shadow: 0 2px 6px rgba(100,100,100,.3);
        

}