@charset "utf-8";
/* CSS Document */
ul, li {
  list-style: none;
}
a {
  text-decoration: none;
}
.major {
  width: 100%;
 height: 100%;
  background-color: #f9f9f9;
  padding: 3em 0;
}
.majorMain {
  width:1330px;
  margin: 0 auto;
  background: #fff;
	padding: 2em;
	padding-bottom: 4em;
}
.majorMainHead {
  height: 3em;
  border-bottom: #bfbfbf 1px solid;
  display: flex;
  justify-content: space-between;
}
.majorMainHead_left {
  width: 11%;
  border-bottom: #036CBD 4px solid;
  display: -webkit-box; /*flex弹性布局*/
  -webkit-box-align: center;
  -webkit-box-pack: center;
}
.majorMainHead_left h2 {
  font-family: 'Microsoft YaHei' !important;
  font-weight: 500;
  text-align:center;
  margin: 0; /*清除样式*/
  color: #036cbd;
}
.majorMainHead_rigth {
  display: -webkit-box; /*flex弹性布局*/
  -webkit-box-align: center;
  -webkit-box-pack: center;
  color: #036cbd!important;
}
.majorMainHead_rigth a {
  color: #036cbd;
}

.majorData ul{
	margin-top: 2em;
}
.majorData li{
	float: left;
	width: 32%;
	height: auto;
	margin:0.5%;
	position: relative;
	box-shadow: 3px 3px 6px #c3c3c3;
}
.majorData img {
  width:100%;
  height:auto;
  display: block;
 margin-top:30px;
  object-fit: fill;
  transition: all 2s;
}
.ai_vidio{
    width: 100%;
    height: auto;
}
.ai_vidio iframe{
    margin-top:20px;
    width: 100%;
/*    height: auto;*/
    object-fit: fill;

}
/*.ai_vidio{
margin:20px 20%;
}*/
/*.majorData img:hover{
transform: rotateY(360deg);
}
*/
@media screen  and (max-width: 1366px) {
  .majorMain {
    width: 85%;
  }
  .majorData li {
    height: 21em;
    margin: 5px;
  }
}
@media screen and (max-width: 1024px) {
  .majorMain {
    width: 90%;
    font-size: 85%;
	  padding: 1em;
  }
  .majorData li {
    width: 48%;
    height: 26em;
    margin-bottom: 2em;
  }
  .majorData h2 {
    font-size: 14px;
  }
}
@media screen  and (max-width: 768px) {
  .major {
    padding: 1em 0;
  }
  .majorMain {
    width: 90%;
  }
  .majorMainHead_left {
    width: 13%;
  }
	  .majorData li {
    height: 24em;
  }
	.majorData h2 {
	bottom:-4%;
  left: 8%;
}
}
@media screen and (max-width:480px) {
	.major {
    padding: 0.5em 0;
  }
  .majorMain {
    width: 95%;
    padding: 1em;
    padding-top: 0;
  }
  .majorMainHead h2, p {
    font-size: 14px;
  }
  .majorMainHead_left {
    width: 17%;
  }
  .majorData ul {
    display: block;
    margin-top: 1em;
  }
  .majorData {
    overflow: hidden;
  }
  .majorData li {
    width: 49%;
    height: 16em;
    float: left;
    position: relative;
    margin-bottom: 10px;
	  box-shadow: none;
	  border: #fff 0.5px solid;
  }
  .majorData h2 {
    font-size: 14px;
    bottom: 0;
  }
	.majorData p{
		font-size: 12px;
	}
}