/*默认基础属性样式*/
.w_1200{ width:1200px; margin:0 auto;}
.po_r{ position: relative;}
.last_mr{ margin-right: 0 !important; border: 0!important;}
.last_mr_two{margin-right: 0 !important;}

/**头部**/
.header{ width: 100%; height: 830px;  position: relative; z-index: 10000;}
.top_nav{ position: absolute; left: 0; top: 0; z-index: 9999; width: 100%; height: 37px; overflow: hidden; background: url("../../../images/4/v300_30/top-nav-bg.png") repeat-x;}
.top_nav .l_welcome{ line-height: 30px; color: #fff; float: left; }
.top_nav .hot_phone{ float: right;}
.top_head{ position: absolute; left: 0; top: 35px; z-index: 9998; width: 100%; height:115px; ; background: url("../../../images/4/v300_30/head-bg.png") repeat-x left top;}
.logo{ width: 175px; height: 115px; float: left; }
.hot-phone{ width: 180px; height: 80px; float: right;}

.ggb{bottom: 40px !important;}
.bontop{ position:relative; width:100%;}
.bontop .bot_bl {position: absolute;top:-40px;left: 0;z-index: 999;width: 100%;height: 40px;background: url("../../../images/4/v300_30/banner-bot-bg.png") repeat-x;}