请教大家一个CSS排版问题
<?php include_once("top.php");?><style>.mainflame{ margin-top:10px; width:951px; height:900px; margin-left:auto; margin-right:auto; }.mainflame_service{ border:2px solid #c7e0f4; background:#edf5fc; width:185px; height:235px; padding-top:5px; padding-left:5px;}.mainflame_service_img_fuwu{ background:url(img/youxi171fuwu.jpg); width:180px; height:42px;}.mainflame_service_line{ width:180px; height:0px; border:1px solid #c7e0f4; }.mainflame_service_textlist{ padding-bottom:5px; padding-top:5px; width:180px; font-size:12px; border-bottom:1px solid #dcedfb; }.mainflame_ad{ padding-bottom:5px; padding-top:5px; width:515px; height:180px; font-size:12px; border:1px solid #dcedfb; }</style><div class="mainflame"> <div class="mainflame_service"> <div class="mainflame_service_img_fuwu"> </div> <div class="mainflame_service_line"> </div> <div class="mainflame_service_textlist"> <a href="#">游戏币</a></div> <div class="mainflame_service_textlist"> 游戏币 </div> <div class="mainflame_service_textlist"> 游戏装备 </div> <div class="mainflame_service_textlist"> 游戏点卡 </div> <div class="mainflame_service_textlist"> 账号交易 </div> <div class="mainflame_service_textlist"> 常见问题 </div> <div class="mainflame_service_textlist"> 客服中心 </div> </div> <div class="mainflame_ad"> </div></div><?php include_once("bottom.php");?>