* {
	margin: 0;
	padding: 0;
}

ul {
	list-style: none;
}



.nav {width: 100%;
    height: 40px;
    line-height: 40px;
    overflow: hidden;
    
	
	position: relative;
}

.nav li {
	
    padding: 0 12px;
	text-align: center;
	line-height: 42px;
	float: left;
	cursor: pointer;
}
.nav li a{
    font-size: 15px;
    color: #47332a;}
.nav li:hover {
	color: red;
	font-weight: bold;
}
ul {
	position: relative;
	max-height: 1200px;
	overflow-y: auto;
}
.mainlist.pro-list{	position: relative;
	max-height: 1200px;
	overflow-y: auto;}
.nav span {
	position: absolute;
	top: 0;
	
	width: 84px;
	height: 42px;
	background: url(/static/images/menubg.png) center top no-repeat;
}#cloud{
  position:absolute;
  top:0;
  /* 不要写 left:50% !important; */
}