@charset "utf-8";
/* CSS Document */
body{background:#f3f3f3;}
body,img,p,h3,ul,li,h4,h1{margin:0;padding:0}
img{ border:none; display:block;}
h3{font-family:'微软雅黑'; font-size:19px; text-align:center; margin:10px 0;}
.red{color:red;}
.left{float:left;}
a{color:black;}
.en_font{font-family:Arial, Helvetica, sans-serif; font-size:14px;}
#header,.stu_video,.xixun{width:1003px; margin:0 auto;}
.stu_video{overflow:hidden; margin-top:10px;}
.left_box{width:500px; float:left; margin-left:20px; }
.red_bg{width:995px; border:4px solid #F0F; height:44px; font-family:'微软雅黑'; font-size:14px; }
.right_box{ float:left;margin-left:15px;}
.letter{width:411px; height:875px; background:#ffceff; border:4px dashed #d900d9; clear:both; padding:10px;}
.letter p{line-height:25px; text-decoration:underline; margin-top:20px; font-size:15px;}
.chen_yt{width:432px; height:287px; background:#fffecd; border:4px dashed #ffc209;}
.chen_yt h3{ margin-left:40px; margin-top:30px;}
.chen_yt p{line-height:28px; text-decoration:underline; margin:20px 35px;}
.xixun{margin-top:10px;}
.xixun li{list-style:none; float:left; display:block; width:300px; margin-left:20px; text-align:center;}
.xixun h4{font-family:'微软雅黑'; margin-top:10px; margin-bottom:10px;}