@import "base.css";
#menu { margin: 0; padding: 0;
    position: fixed; right: 30px; top: 10px;
    list-style-type: none;
    z-index: 70;}
#menu li { float: left; margin:  0 20px 0 0; font-size: 14px;}
#menu a { float: left; padding: 10px 20px; background-color: #E0E3EA; color: #333; text-decoration: none;}
#menu .active a { color: #fff; background-color: #3879D9;}
.section { text-align: center; font: 50px "Microsoft Yahei"; color: #fff;position: relative;}
.section:first-child{
    background-image:url("../img/ye.png");
    background-size: 100% 110%;

}


.section:first-child .bg1{
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    position:absolute ;
    top:0;
    left: 0;

}
.section:first-child .bg2{
    width: 100%;
    height: 100%;
    background: url("../img/jz7.png") no-repeat;
    position:absolute ;
    bottom:0;
    left: 800px;
    transition: all 1.5s;
    transform: translateY(400px);


}
.title1{
    width: 500px;
    height: 400px;
    position: absolute;
    left:300px ;
    top: 150px;
    z-index: 20;
    transition: all 2s;
    transform: scale(0);

}
.bt1{
    font-size: 50px;
    margin-bottom: 10px;
}
.bt2{
    font-size: 40px;
}

.section:first-child.active .bg2{
    transform: translateY(0px);
}
.section:first-child.active .title1{
    transform: scale(1);
}

/*section2--开始*/
.section:nth-child(2){
    background-image:url("../img/101.jpg");
    background-size: 100% 110%;

}
.section:nth-child(2) .bg1{
    width: 100%;
    height: 100%;
    background: rgba(225,225,225,0.5);
    position:absolute ;
    top:0;
    left: 0;

}
.section:nth-child(2) .bg2{
    width: 100%;
    height: 400px;
    background: url("../img/bg41.png") no-repeat;
    position:absolute ;
    bottom:20px;
    left: 50px;
    transition: all 1s;
    transform: translateY(400px);


}
.section:nth-child(2) .bg3{
    width:100%;
    height: 400px;
    background: url("../img/bg42.png") no-repeat;
    /*transform: rotateX(90deg);*/
    position:absolute ;
    bottom: 30px;
    left:50px;
    transition: all 1s;
    transform: translateY(400px);

}
.title2{
    width: 600px;
    height: 400px;
    position: absolute;
    left: 50%;
    margin-left: -300px;
    top: 70px;
    z-index: 20;
    transition: all 2s;
    transform: scale(0);
    margin-bottom: 20px;

}
.bt2-1{
    color:#E0E3EA ;
    font-size: 40px;
    margin-bottom: 10px;
}
.bt3{
    margin-top: 20px;
    width: 600px;
    font-size: 18px;
    line-height: 24px;
    color:#E0E3EA ;
    text-indent: 2em;
    float: left;
}


.section:nth-child(2).active .bg2{
    transform: translateY(0px);
}
.section:nth-child(2).active .bg3{
    transform: translateY(0px);
}
.section:nth-child(2).active .title2{
    transform: scale(1);
}
/*第三部分开始*/
.section:nth-child(3){
    background: url("../img/shenlan2.png") no-repeat;
    background-size: 100%;
}
.section:nth-child(3) .bg1{
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    position:absolute ;
    top:0;
    left: 0;

}
.zhuti{
    width: 1200px;
    height: 500px;
    margin: 0 auto;
    /*background:yellow ;*/
    position: absolute;
    top: 100px;
    left: 50%;
    z-index: 50;
    margin-left: -600px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
div main .box{
    width: 20%;
    height: 250px;
    background:#fff;


}
.zhuti-title{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    align-content: flex-start;
    line-height: 80px;
}
.bt4{
    margin-left: 20px;
    margin-top: 40px;
    display: block;
    font-size: 80px;
    color: #fff;
    font-family: BrowalliaUPC;
    font-weight: bold;
}
.bt5{
    display: block;
    width: 70px;
    font-size: 60px;
    color: #fff;
    font-family: '宋体';
    font-weight: bold;
}
.zhuti-xia{
    width: 100%;
    height: 300px;
    display: flex;
    justify-content: space-around;

}

.pic{
    padding-top: 20px;
    width: 90%;
    margin: 0 auto;
    height: 150px;
}
.pic img{
    width: 100%;
    float: left;

}
.wenzi{
    margin-top: 20px;
    width: 100%;
    font-size: 18px;
    color: #000;
    text-align: center;
}
.zhuti-title{
    transition: all 1s;
    transform: scale(0);
}
.box:first-child{
    transition: all 1.5s;
    transform: translateX(-400px);
}
.box:nth-child(2){
    transition: all 1.5s;
    transform: translateX(-800px);
}
.box:nth-child(3){
    transition: all 1.5s;
    transform: translateX(800px);
}
.box:last-child{
    transition: all 1.5s;
    transform: translateX(400px);
}

.section:nth-child(3).active .box:first-child{
    transform: translateX(0px);
}
.section:nth-child(3).active .box:nth-child(2){
    transform: translateX(0px);
}
.section:nth-child(3).active .box:nth-child(3){
    transform: translateX(0px);
}
.section:nth-child(3).active .box:nth-child(4){
    transform: translateX(0px);
}
.section:nth-child(3).active .zhuti-title{
    transform: scale(1);
}

/*第四部分开始*/
.section:nth-child(4){
    background: url("../img/lan4.png") no-repeat;
    background-size: 100%;
}
.section:nth-child(4) .bg1{
    width: 100%;
    height: 100%;
    background: rgba(225,225,225,0.2);
    position:absolute ;
    top:0;
    left: 0;
}

.title4{
    width: 1200px;
    height: 400px;
    z-index: 20;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 0 auto;
    overflow: hidden;
}
.box2{
    width: 30%;
    height: 400px;
    border-top:3px solid #2D2D2D ;

}
.biaoti{

    padding-top: 120px;
    font-size: 60px;
    font-weight: bold;
    color:#2D2D2D ;
}
.biaoti2{
    margin: 0 auto;
    width: 250px;
    margin-top: 90px;
    font-size: 14px;
    color:#2D2D2D;
    line-height: 22px;

}
.lianbox{
    padding: 50px;
    height:300px ;
}
.lianx{
    font-size: 18px;
    color:#2D2D2D ;
    line-height: 60px;
}
.lianxiimg{
    height: 48%;

    border-bottom: 1px solid #2D2D2D;
}
.lianxiimg:last-child{
    border-bottom: none;
}

.lianxiimg img{
    padding-top: 40px;

}
.box2:nth-child(1){
    transition: all 1s;
    transform:translateX(200px); ;
}
.box2:nth-child(2){
    transition: all 1.5s;
    transform:translateX(400px); ;
}
.box2:nth-child(3){
    transition: all 2s;
    transform:translateX(800px); ;
}

.section:nth-child(4).active .box2:nth-child(1){
    transform: translateX(0px);
}
.section:nth-child(4).active .box2:nth-child(2){
    transform: translateX(0px);
}
.section:nth-child(4).active .box2:nth-child(3){
    transform: translateX(0px);
}