.singcontainer{
    width: 100%;
    background: #21233C;
}
.topnav{
    position: relative;
}
.singcontainer img{
    display: block;
    margin: 0 auto;
}
.singteacher{
    padding-top: 60px;
    max-width: 1920px;
}

.singcontainer div{
    margin: 0 auto;
}
.db3{
    text-align: center;
}
/*.singtxt5{*/
/*    text-align: center;*/
/*    display: block;*/
/*    margin: 0 auto;*/
/*    width: 530px;*/
/*    height: 50px;*/
/*    font-size: 36px;*/
/*    font-family: PingFangSC-Semibold, PingFang SC;*/
/*    font-weight: 600;*/
/*    color: #6430E5;*/
/*    line-height: 106px;*/
/*}*/
.singinglast{
    padding-top: 60px;
    padding-bottom: 80px;
}