*{margin: 0px;padding: 0px;} 
body{margin: 0px auto;width: 80%;background:url("../images/bg2.jpg")} 
.top{height:50px;text-align: center;line-height: 50px;} 
/*计时和访问人数*/ 
.tool{position: absolute;width:80%;top:0px;}
.tool .time{float:right;width:120px;height:50px;font-size: 14px;} 
.tool .time p{margin:5px;text-align:center;}
.tool .visit{float:right; width:100px;height:50px;font-size: 14px;} 
.tool .visit p{margin:5px;text-align:center;}
/*返回顶部*/ 
.bottom{height:50px;} 
.gotop{height:30px;text-align: center;line-height:30px;} 
.button{cursor: pointer;}

hr{color:#cccccc;height:5px;}

.main{line-height: 30px;margin: 0px 0px;}
.main h3{margin: 10px 0px;}