section { clear: both; position: relative;  display: inline-block; }
section .sf_ad { float: left; width: 100%; margin: 20px 10px 20px 0px; border: 0px solid #ddd; margin-right: 15px; }
section .sf_ad dl { margin: 0; display: flex; height: 100%; }
section .sf_ad dt { float: left; width: 100px; background: #fff; margin-right: 5px; height: 100%; }

section .sf_ad dt ul { margin: 10px 0px; }
section .sf_ad dt li { box-sizing: border-box; width: 100%; height: 70px; border: 1px solid #ddd; margin-bottom: 10px; border-radius: 6px; padding: 10px; font-size: 12px; line-height: 20px;}
section .sf_ad dt li i { font-size: 26px; }
section .sf_ad dt li.on { width: 100%; height: 70px; background: #f7f9ff; border: 1px solid #3d61ad; }

section .sf_ad dd { float: left; width: 1090px;  }
section .sf_ad dd .ad_info h2 { text-align: left; font-size: 18px; margin-bottom: 15px;}
section .sf_ad dd .ad_info { clear: both;  border-radius: 6px; margin: 10px; width: 100%; height: 100%; text-align: left; border: 1px solid #ddd; padding: 15px; }

section .sf_ad dd .ad_info ul { display: inline-block; margin-top: 15px; clear: both; }

section .sf_ad dd .ad_info li.m1 { width: 600px;  margin-right: 15px; float: left; font-size: 16px; }
section .sf_ad dd .ad_info li.m1 h2 { font-size: 16px; margin: 15px; }
section .sf_ad dd .ad_info li.m1 div { font-size: 16px; margin: 15px; }
section .sf_ad dd .ad_info li.m2 { width: 470px;   float: left; font-size: 16px; }
section .sf_ad dd .ad_info li.m2 dl { display: inline-block; clear: both; width: 100%; border: 1px solid #ddd; margin-bottom: 25px; border-radius: 5px;}
section .sf_ad dd .ad_info li.m2 dt { width: 100%;  padding: 15px; box-sizing: border-box; color: #000;  border-radius: 5px;}
section .sf_ad dd .ad_info li.m2 dd { position: relative; width: 100%;  padding: 5px 15px; box-sizing: border-box; line-height: 26px;  border-radius: 5px;}
section .sf_ad dd .ad_info li.m2 dd p.btn { position: absolute; bottom: 10px; right: 15px; padding: 3px 15px; background-color: #3d61ad; border-radius: 3px; color: #fff; font-size: 14px; cursor:pointer;}
section .sub_info { position: relative; float: left;  width: 290px; margin-top: 20px;  text-align: left; border: 1px solid #ddd;  }
section .sub_info h2 { font-size: 14px; margin: 10px; text-align: left; }