* {
				margin: 0;
				padding: 0;
			}

			body {
				font-family: 微软雅黑, Calibri, Arial, Tahoma, sans-serif;
				background-color: #fff;
			}

			.clear {
				clear: both;
			}

			/* 以下是主导航 */
			#top_bg {
				width: 100%;
				height: 54px;
				background: url(../images/top_bg.jpg) center;
				z-index: 1;
			}

			/* logo以背景图方式插入 */
			#top_1 {
				width: 1062px;
				height: 44px;
				margin: 0 auto;
				background: url(../images/logo.png) no-repeat left 0;
			}

			#top_2 {
				width: 803px;
				margin-left: 300px;
			}

			/* 以下是搜索框 */
			#search {
				width: 245px;
				height: 35px;
				margin: 10px 30px;
				background: #FFF;
				border-radius: 30px;
				float: left;
			}
			#form{
				border: none;
			}
			#input{
				width:208px;
				height: 30px;
				margin-top:3px;
				font-size:18px;
				text-indent: 1em;
				float:left;
				border-radius:20px;
				border: none;
				outline: none;
			}
			#input:focus{
				border: none;
				outline: none;
			}
			.search_icon {
				width: 24px;
				height: 24px;
				margin: 6px;
				float:left;
			}

			#nav {
				width: 498px;
				float: left;
			}

			#nav .nav_button {
				list-style: none;
				margin-right: 12px;
				float: left;
				position: relative;
			}

			.nav_button ul {
				list-style: none;
				background: #808080;
				display: none;
				position: absolute;
				z-index: 1;
			}

			.nav_button ul li {
				width: 90px;
				height: 50px;
			}

			/* 去掉最后一个按钮的边距 */
			#nav li:nth-child(5) {
				margin-right: 0;
			}

			/* 单独设置二级导航的a的统一高度,其他属性继承 */
			.nav_button ul li a {
				height: 50px;
			}

			.nav_button ul li a:hover {
				color: #00f;
			}

			#nav a {
				text-decoration: none;
				font-size: 16px;
				color: #fff;
				width: 90px;
				line-height: 54px;
				text-align: center;
				display: inline-block;
			}

			#nav a:hover {
				background: #6B6B6B;
			}



			/* 版权板块 */
			#copyright {
				margin-top: 60px;
				width: 100%;
				height: 338px;
				background: #6B6B6B;
			}

			#footer {
				list-style: none;
				width: 853px;
				height: 240px;
				margin: 0 auto;
				padding-top: 58px;
				position: relative;
			}

			.footer_box1 {
				width: 253px;
				height: 200px;
				margin-top: 20px;
				position: relative;
			}

			.footer_box2 {
				width: 389px;
				height: 50px;
				position: absolute;
				right: 0;
				bottom: 0;
			}

			#contact {
				width: 270px;
				height: 140px;
				padding: 18px 0 0 0;
				position: absolute;
				left: 0;
				bottom: 0;
			}

			#contact p {
				margin-top: 10px;
				font-size: 16px;
				color: #B8B8B8;
			}

			#contact p:nth-child(2n) {
				text-decoration: underline;
				color: #fff;
				margin-top: 2px;
				font-size: 22px;

			}

			.footer_box1 a {
				text-decoration: none;
				position: absolute;
				top: 15px;
				font-size: 18px;
				color: #fff;
			}

			.footer_box1 a:hover {
				text-decoration: underline;
			}

			.footer_box2 p {
				color: #fff;
				font-size: 16px;
				margin-top: 5px;
				text-align: right;

			}

			#footer h1 {
				color: #fff;
			}

			#footer img {
				position: absolute;
				right: 0;
				top: 130px;
			}