*{margin:0px;padding:0px;}
#body{background:white;font-family:arial;color:#3334;font-size:13px;}
.clear{clear:both;}

#wrapper{width:920px;border:1px solid cyan;margin:10px auto;}

#header{width:100%;height:30px;padding-top:20px;padding-bottom:20px;}
#logo{width:135px;font-size:20px;font-weight:600;float:left;}
#navigation{width:630px;float:left;}
#navigation ul{list-style-type:none;}
#navigation ul li{float:left;padding:8px 15px;}
#navigation ul li span{background:pink;padding:5px;border-radius:2px;}
#promotional-link{width:155px;float:left;padding-top:10px;}
#promotional-link a{padding:10px;text-decoration:none;border-radius:5px;border:1px solid green;color:green;}
#promotional-link a:hover{background:green;color:white;}

#banner{width:100%;}
#left_banner{width:50%;height:350px;background:#e8f3ec;float:left;}
#right_banner{width:50%;height:350px;background:URL(image/home.jpg) left top no-repeat;float:left;}
.banner_content{width:80%;margin:40px 20px 30px 20px;font-size:15px;}
.banner_content h1{font-size:32px;}
.banner_content p{padding:20px 0px;line-height:20px;}
.banner_content a{border-radius:5px;padding:10px 15px;background:#333;text-decoration:none;color:#fff;}
.banner_content a:hover{background:#444;}

#after_banner{width:100%;}
#box1{width:50%;height:250px;background:red;float:left;}
#box2{width:50%;height:250px;background:green;float:left;}

#content{width:100%;}
#right_sidebar{width:70%;height:350px;background:brown;float:left;}
#left_sidebar{width:30%;height:350px;background:yellow;float:left;}

#footer{width:100%;height:80px;background:blue;}