.box {
  max-width: 1200px;
  min-width: 900px;
  margin: 0 auto;
}

.header {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: flex-start;
  align-items: center;
}

.header .log {
  width: 350px;
}

.header ul {
  display: flex;
  flex: 1;
  flex-direction: row;
  justify-content: flex-start;
  align-items: center;
  margin-left:150px;
}

.header ul dl {
  height:170px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  flex-grow: 1;
}
.header ul dl a{color:#7d7979;}
.header ul dl dt{font-size:17px; color:#7d7979 !important; font-weight:600; letter-spacing: 0.2rem;}
.header ul dl:hover{background:#42b3e5;}
.header ul dl:hover a{color:#fff}
.header ul dl dd {
  margin-top: 10px;
  font-size:10px;
 /* font-weight:600;*/
}

.banner {
	padding:0;
	margin:0 auto;
  
	/*height: 774px;*/
    max-width: 1920px;
    min-width: 1280px;
  
}
.banner .gao {
   /* height: 774px;*/
    position: relative;
    list-style: none;
    overflow: hidden;
}

.banner img {
  width: 100%;height: 100%;
  display:block;
/*  height:100%;*/
}

.banner2 {
	padding:0;
	margin:0 auto;
  
	/*height: 721px;*/
    max-width: 1920px;
    min-width: 1280px;
  
}


.banner2 img {
 height: 100%;
  display:block;
/*  height:100%;*/
width:100%;
}


.nav-box{  
	
	width: 100%;height: 325px;margin-bottom: 60px;
	/*box-shadow:0px 3px 15px rgba(124, 123, 123,0.5);*/
}

.nav-cat {
  /*padding: 60px 0;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;*/
  
  
  width: 1200px;overflow: hidden;margin: 0 auto;display: flex;padding-top: 66px;

}

.nav-cat dl {
  flex:1;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  cursor: pointer;
}

.nav-cat  em{width: 1px;height: 150px;background: #e5e5e5;float: left;}
.nav-cat dl a{color:#9da6b9}

.nav-cat dl dt img {
  width: 110px;
}

.nav-cat dl dd {
  text-align: center;
  padding:10px 0;
}

.nav-cat dl dd.cn{font-size:27px; /*font-weight:550*/}
.nav-cat dl dd.en{font-size:14px; line-height:25px;}
.footer {
  display: flex;
  margin-top: 20px;
}

.footer ul {
  width: 100%;
 /* margin-left: 20%;*/
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  text-align:center;
}

.footer ul li {
  width: 50%;
  height: 40px;
  line-height: 40px;
  color: #393940;
}