.cwhy_body{background:#eee;}
.cwhy_top_banner{
  width:100%;
  min-width:1240px;
  margin:0 auto;
  margin-bottom:30px;
  height:320px;
  /*background:url(../images/ztzl/cwhy_banner.png) center no-repeat;*/
  background:url(/static_common/images/guohui/yx_guohui_cwhydoc.png) center no-repeat;
  background-size:1800px 320px;
}
.cwhy_main{width:1200px;min-height:400px;padding:20px;margin:0 auto;margin-bottom:30px;background:#fff;}
.cwhy_main .cwhy_locate{height:40px;line-height:40px;margin-bottom:20px;padding:0px 40px;background:#f2f6fa url(../images/home_locate.png) 10px center no-repeat;}
.cwhy_main h1{padding-top:15px;padding-bottom:30px;line-height:1.2;text-align:center;}
.cwhy_main .article_mes{text-align:center;padding:18px 0px;color:#888;border-top:1px solid #ccc;}
.video_part{width:540px;padding:20px 0px;height:304px;margin:0px auto;margin-bottom:20px;}
.video_part .video_box{background:#fff;width:100%;height:100%;}
.article_main{margin-bottom:30px;line-height:1.8;padding:0 50px}
.article_img{background:#f2f6fa;height:280px;padding:20px;margin:0 50px}
.article_img .img_box{width:630px;height:280px;margin:0 auto;}
.article_img .img{height:280px;width:420px;background:#fff;overflow:hidden;}
.article_img .img img{width:100%;vertical-align:middle;}

@media (max-width:1080px){
  .cwhy_top_banner{min-width:100%}
  .cwhy_top_banner{margin-bottom: 10px;height: 30vw;background-size: 180% auto;}
  .cwhy_main{width:100%;box-sizing: border-box;}
  .cwhy_main .cwhy_locate{height:auto}
  .article_main{padding:10px}
  .video_part{width:100%;height:auto;padding-bottom:0}
  .article_img{box-sizing:border-box;margin-left:0}
  .article_img,.article_img .img_box,.article_img .img_box,.article_img .img{width:100%;height:auto}
}