/* 代码整理：时代Java NowJava.com */
body, div, h1, h2, h3, h4, h5, h6, p, ul, ol, li, dl, dt, dd, img, form, fieldset, input, textarea, blockquote {
	margin: 0; padding: 0; border: 0;
}

body {
	background: #909eab url(bg.png);
	font-family: Helvetica, sans-serif; font-size: 18px; line-height: 24px;
}

nav {
	margin: 100px auto; 
	text-align: center;
}

nav ul ul {
	display: none;
}

	nav ul li:hover > ul {
		display: block;
	}

nav ul {
	background: #efefef; 
	background: linear-gradient(top, #efefef 0%, #bbbbbb 100%);  
	background: -moz-linear-gradient(top, #efefef 0%, #bbbbbb 100%); 
	background: -webkit-linear-gradient(top, #efefef 0%,#bbbbbb 100%); 
	box-shadow: 0px 0px 9px rgba(0,0,0,0.15);
	padding: 0 20px;
	border-radius: 10px;  
	list-style: none;
	position: relative;
	display: inline-table;
}
nav ul:after {
	content: ""; clear: both; display: block;
}

nav ul li {
	float: left;
}
nav ul li:hover {
	background: #4b545f;
	background: linear-gradient(top, #4f5964 0%, #5f6975 40%);
	background: -moz-linear-gradient(top, #4f5964 0%, #5f6975 40%);
	background: -webkit-linear-gradient(top, #4f5964 0%,#5f6975 40%);
}
nav ul li:hover a {
	color: #fff;
}
	
nav ul li a {
	display: block; padding: 25px 40px;
	color: #757575; text-decoration: none;
}
	
nav ul ul {
	background: #5f6975; border-radius: 0px; padding: 0;
	position: absolute; top: 100%;
}
nav ul ul li {
	float: none; 
	border-top: 1px solid #6b727c;
	border-bottom: 1px solid #575f6a; position: relative;
}
nav ul ul li a {
	padding: 15px 40px;
	color: #fff;
}	
nav ul ul li a:hover {
	background: #4b545f;
}
	
nav ul ul ul {
	position: absolute; left: 100%; top:0;
}