.bg_blue{background-color:#2684FF;color:#fff;}

.plate_title{margin-top:56px;margin-bottom:40px;font-size:28px;font-weight:bold;}
.Screen{width:100%;height:440px;}
/* 1 */

.jumbotron{background:url(../img/about_jm.png);}
.plate1 li{min-height:150px;padding-bottom:56px;}
.plate1 .plate_title{margin-bottom:16px;}
.plate1 .plate_title~p{font-weight:normal;color:#232323;margin-bottom:36px;}
.plate1 h4{font-size:18px;font-weight:bold;margin-top:16px;margin-bottom:14px;color:#232323;}
.plate1 p{color: #7d7d7d;margin-bottom:0;font-size:14px;font-weight:bold;}
/* 2 */
.plate2{padding-bottom:56px;}
.plate2 li{position:relative;}
.plate2 img{width:100%;}
.plate2 p{background:rgba(34,43,52,.75);position:absolute;top:0;bottom:-10px;right:15px;left:15px;color:#fff;display: flex;align-items: center;padding:50px;box-sizing:border-box;}
.plate2 li:hover p{background:rgba(34,43,52,.9);}
/* 3 */
.plate3 .plate_title{margin-bottom:20px;}
.plate3 p{margin-bottom:40px;}
.plate3 .btn{font-size:18px;}
.plate3{background:url(../img/bottom_bg.png) no-repeat;background-size:cover;background-position:center center;padding-bottom:40px;}
.plate3 .btn{width:156px;height:48px;}
.plate3 .btn:hover,.plate3 .btn:focus,.plate3 .btn.focus{color:#fff;}
@media(min-width:768px){
  .Screen1{display: none;}
}
@media (max-width: 767px) {
  .jumbotron{background:url(../img/about_jm1.png);}
  .plate_title{font-size:20px;margin-top:28px;margin-bottom:20px;}
  .plate1 li{padding:0 10px;}
  .plate1 .plate_title{margin-bottom:8px;}
  .plate1 .plate_title~p{margin-bottom:18px;}
  .plate2{padding-bottom:8px;}
  .plate3{padding-bottom:28px;}
  .plate3 .plate_title{margin-bottom:10px;}
  .plate3 p{margin-bottom:20px;}
  .plate3 .btn{font-size:14px;}
  .plate3 .btn{width:104px;height:36px;}
  .Screen{display:none;}
  .Screen1{width:100%;height:220px;margin-top:52px;}
  .plate1 h4{font-size:16px; font-weight:bold;margin-top:8px;margin-bottom:7px;}
  .plate1 p{font-size:12px;}
  .plate2 li{margin-top:15px;}
  .plate2 .plate_title{margin-bottom:5px;margin-top:18px;}
}