*,
*::after,
*::before{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
a{text-decoration: none;}
.clearfix:before,.clearfix:after {content:"";display:table;}
.clearfix:after {clear:both;overflow:hidden;}
.clearfix {*zoom: 1;}
.tc{text-align: center;}
body{
    background-image: url(../img/main.png);
    background-position: top center;
    background-repeat: no-repeat;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif ,'microsoft yehei';
    height: 2000px;
}
.app{
    width: 1030px;
    margin: 0 auto;
}
.text{
    font-size: 18px;
    line-height: 2;
    color: #2e2e2e;
}
.link{
    display: inline-block;
    color: #fe1661;
}
.red{
    color: #fe1661;
}
.toppic{
    font-size: 24px;
    text-align: center;
}
.toppic::before,
.toppic::after{
    content: '';
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background-color: #ff7775;
    vertical-align: middle;
    margin-left: 15px;
    margin-right: 15px;
}
.block1{
    background-color: #fff;
    border-radius: 20px;
    margin-top: 528px;
    padding: 30px;
}
.block1 .link{
    margin-top:5px;
}
.block2{
    margin-top: 80px;
}
.block2 dl{
    margin-top: 60px;
    margin-left: -33px;
    margin-right: -33px;
}
.block2 dl dd{
    float: left;
    width: 33.3333%;
    padding-left: 33px;
    padding-right: 33px;
}
.block2 dl dd .item{
    background-color: #fff;
    border-radius: 15px;
    padding: 33px 25px;
    height: 300px;
}
.block2 dl dd .item .title{
    text-align: center;
    font-size: 20px;
    color: #242424;
    margin-bottom: 20px;
    font-weight: bold;
}
.block2 b{
    display: inline-block;
    color: #363636;
    margin-top: 30px;
    font-size: 18px;
}
.block3{
    margin-top: 90px;
}
.block3 .toppic{
    margin-bottom: 40px;
}
.block3 .text{
    text-align: center;
}
.block4{
    margin-top: 90px;
}
.block4 dl{
    margin-top: 60px;
    margin-left: 100px;
    background-image: url(../img/icon.png);
    background-repeat: no-repeat;
    background-position: 200px top;
    height: 500px;
}
.block4 dl dd{
    float: left;
    width: 300px;
   
}
.block4 dl dd:nth-child(1){margin-top: 70px;margin-left:70px;}
.block4 dl dd:nth-child(2){margin-top:120px;margin-left: 190px;}
.block4 dl dd:nth-child(3){margin-top: 90px;margin-left:170px;}
.block4 dl dd:nth-child(4){margin-top:160px;margin-left: 160px;}
.block4 dl dd .item .title{
    text-align: center;
    font-size: 20px;
    color: #242424;
    margin-bottom: 20px;
    font-weight: bold;
}