.title{    display: flex;justify-content: space-between;border-bottom: 1px solid #DBDBDB;padding-bottom: 10px;width: 580px;margin: 0 auto;}
.title li:nth-child(1){font-size: 30px;}
.title li:nth-child(1) i{display: inline-block;width: 30px;height: 34px;background:url(../images/spzj.png) no-repeat 0px 0px;vertical-align: middle;margin-right: 8px;}

.title li:nth-child(2) a{font-size: 22px;color: #999999;vertical-align: middle;}
.cont{
    margin-top: 40px;
}
.math{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    width: 580px;
    margin: auto;
    padding-top: 15px;
}
.math li{
    margin-bottom: 28px;
}
.math li h3{
    font-size: 24px;
    margin-top: 16px;
    color: #333333;
}
.math li p{
    font-size: 20px;
    line-height: 38px;
    color: #999999;
}
.diji{
    text-align: center;
    /*margin-top: 38px;*/
    font-size: 24px;
    padding-bottom: 22px;
}
 .diji span{
    width: 10px;
    height: 10px;
    border-bottom: 2px solid #666666;
    border-left: 2px solid #666666;
    position: relative;
    transform: rotate(-45deg);
    display: inline-block;
    margin-bottom: 6px;
}