.spantitle{font-size:18px;font-weight:bold;display:block;line-height:40px;display:block;border-bottom:1px solid #ddd;}

.tb{margin:10px 0px 30px 20px; border-collapse:collapse}
.tb th,.tb td{height:30px;border:1px solid #666;padding-left:5px;}

.bigimgbox{width:838px;margin:0;padding:0}
.bigimgbox ul{list-style-type:none;margin:10px 0 10px 20px;padding:0}
.bigimgbox ul li{float:left;width:270px; height:250px;text-align:center;}
.bigimgbox ul li img{width:240px;height:180px;display:block;margin-bottom:10px; border:1px solid #ddd;padding:5px;}