*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.nav{
    width: 1920px;
    height: 980px;
    background-color: #ffffff;
    margin: 0 auto;
    text-align: center;
    background-image: url(../images/背景图1.jpg);
    background-repeat: no-repeat;
    overflow: hidden;
    padding-top: 100px;
}
.button{
    width: 940px;
    height: 100px;
    text-align: center;
}
.nav li{
    float: left;
    
}
.bi2{
    width: 1253px;
    height: 920px;
    background-image: url(../images/1.png);
    background-repeat: no-repeat;
    margin: 0 auto;
    overflow: hidden;
    padding-left: 156px;
    padding-right: 156px;
   
    
}
a{
    text-decoration: none;
    width: 160px;
    height: 50px;
    background-color: #ffffff;
    display: inline-block;
    color: #ffffff;
    text-align: center;
    line-height: 50px;
    margin: 30px;
margin-top: 50px;
}

.one{
    background-image: url(../images/one.png);
}
.two{
    background-image: url(../images/two.png);
}
.three{
background-image: url(../images/three.png);
}
.four{
    background-image: url(../images/four.png);
}
.one:hover{
    background-image: url(../images/2.png);
}
.two:hover{
    background-image: url(../images/2.png);
}
.three:hover{
    background-image: url(../images/2.png);
}
.four:hover{
    background-image: url(../images/2.png);
}
.search{
    width: 940px;
    height: 60px;
    background-color: #fff;
    border: 4px solid #f19ec2;
    margin: 0 auto;
    overflow: hidden;
    text-align: right;
   
}
.search input{
    width: 780px;
    height: 58px;
    border: 0;
 float: left;
padding-left: 28px;
}
.search input::placeholder{
    font-size: 14px;
    color: #6b6b6b;
}
.search button{
    width: 150px;
    height: 60px;
    background-color: #f19ec2;
    font-size: 16px;
    color: #fff;
   text-align: center;
   line-height: 50px;
   margin-right: 0;
    float: right;
    border: 0;

}
.ttt1{
    width: 150px;
    height: 60px;
    background-color: #f19ec2;
    font-size: 16px;
    color: #ffffff;
   text-align: center;
   display: inline-block;
   line-height: 50px;
   margin-right: 0;
    float: right;
}
.tutu{
    width: 940px;
    height: 540px;
    background-color: #ffd0d0;
    margin: 0 auto;
    margin-top: 30px;
}
.zuo{
    width: 59px;
    height: 59px;
    margin-left: 30px;
    margin-bottom: 316px;
    background-image: url(../images/左.png);
    display: inline;
}
.you{
    width: 59px;
    height: 59px;
    margin-right: 30px;
    margin-bottom: 316px;
    background-image: url(../images/右.png);
}
.dong{
    width: 97px;
    height: 14px;
    background-image: url(../images/动1.png);
    margin: 28px auto;
    text-align: center;
}
.h2{
    width: 1200px;
    height: 60px;
    
    font: bold 16px 思源黑体 optional 386px;
    margin: 0 auto;
    margin-top: 80px;
    
}
.h22{
    width: 300px;
    height: 60px;
    font: bold 16px 思源黑体 optional 386px;
    float: left;
}
.icon{
    width: 260px;
    height: 60px;
    background-image: url(../images/icon1.jpg);
    background-repeat: no-repeat;
    background-position: center;
    float: right;
    color: #ffffff;
    
}

.box{
    width: 1200px;
    height: 480px;
    
   margin: 0 auto;
   margin-top: 30px;
}
.item{
    width: 790px;
    height: 480px;
    background-color: #e5e6ff;
   float: left;
    
}
.item1{
    width: 400px;
    height: 480px;
   
    float: right;
}
.item2{
    width: 400px;
    height: 235px;
    background-color: #e5e6ff;
   float: top;
}
.item3{
    width: 400px;
    height: 235px;
    background-color: #e5e6ff;
    margin-top: 9px;  
}

.box2{
    width: 1200px;
    height: 1188px;
   
   margin: 0 auto;
   margin-top: 30px;
}
ul{
    list-style: none;
}
.box2 li{
    margin-right: 15PX;
    margin-bottom: 34px;
    width: 390px;
    height: 270px;
    background-color: #b8ffe1;
    float: left;
}
.box2 li:nth-child(3n){
    margin-right: 0;
}
.box3{
    height: 200px;
    background-color: #303030;
    margin: 0px auto;
    margin-top: 50px;
}