.body.about_us{height:100%;width:100%;overflow-y:auto;background:#fff}.body.about_us button.is_round{border-radius:20px}.body.about_us button+button{margin-left:10px}.body.about_us main{padding-top:60px;min-height:calc(100% - 111px);border:0 solid transparent}.body.about_us .about_container .about_content{margin:0 auto;padding:50px 0;width:1100px}.body.about_us .about_container .about_content .content_single{margin:0 auto;padding:30px 0;width:850px}.body.about_us .about_container .about_content .content_single .tit{margin-bottom:40px;font-size:34px;text-align:center}.body.about_us .about_container .about_content .content_single .cont{font-size:14px;line-height:28px}.body.about_us .about_container .about_content .content_single .cont>div{margin-bottom:12px}.body.about_us .about_container .about_content .content_service{margin:0 auto;padding:20px 0;width:850px}.body.about_us .about_container .about_content .content_service .tit{font-size:20px;text-align:left}.body.about_us .about_container .about_banner{width:100%;height:300px;background:url(../images/abt_banner-75fca.jpg) no-repeat 50%}