body:before{
		content:'';
		position:fixed;
		z-index:-1;
		top:0;
		right:0;
		bottom:0;
		left:0;
		background-color:#000;
		background:url(https://biohazard-1257263960.cos.ap-guangzhou.myqcloud.com/4/img/bg.jpg) center 0 no-repeat;
		background-size:cover
	}
	
	a{
		color:#fff;
		text-decoration:none
	}
	
	a:hover{
		color:#fff;
		text-decoration:none
	}
	
	table{
		table-layout:fixed
	}
	
	td{
		word-break:break-all;
		word-wrap:break-word
	}
	
	.topbutton{
		position:fixed;
		right:1%;
		bottom:55px;
		z-index:2
	}
	
	#main{
		margin:0px auto 84px;
		width:100%
	}
	
	#news{
		color:#fff;
		font-size:30px;
		line-height:100px;
		text-align:center
	}
	
	#article{
		margin:0 5%;
		color:#fff
	}
	
	.sheetbg{
		background-image:url(https://biohazard-1257263960.cos.ap-guangzhou.myqcloud.com/img/sheetbg.png)
	}
	
	.title{
		font-size:30px;
		font-weight:bold;
		line-height:40px;
		text-align:center
	}
	
	.author{
		font-size:20px;
		line-height:20px;
		text-align:center
	}
	
	.content{
		font-size:25px;
		line-height:40px;
		text-align:justify;
		text-indent:2em
	}
	
	.subtitle{
		font-weight:bold;
		text-align:center;
		text-indent:0em
	}
	
	.pic{
		line-height:0px;
		text-align:center;
		text-indent:0em
	}
	
	.note{
		font-size:20px;
		line-height:20px;
		text-align:center;
		text-indent:0em
	}
	
	.link{
		text-align:center;
		text-indent:0em
	}
	
	#navigation{
		margin:0 5%
	}
	
	.previous{
		font-size:25px;
		font-weight:bold;
		text-align:left
	}
	
	.next{
		font-size:25px;
		font-weight:bold;
		text-align:right
	}
	
	.navtitle{
		font-size:25px;
		font-weight:bold;
		line-height:30px;
		text-align:justify
	}
	
	.navdate{
		color:#EB0000;
		font-size:20px;
		line-height:0px;
		text-align:justify
	}
	
	.navpreview{
		font-size:20px;
		line-height:25px;
		text-align:justify
	}