body{background:#f5f5f5}.ser_main{padding:calc((40 / 19.2) * 1%) 0 calc((130 / 19.2) * 1%) 0}.ser_main .item{--l-w:calc((938 / 14) * 1%);--pd:60px;margin-top:76px;align-items:center}.ser_main .item:nth-child(even){flex-direction:row-reverse}.ser_main .item .img{padding-bottom:calc((398 / 9.38) * 1%)}.ser_main .item .title{font-family:Roboto;font-size:38px;color:#10221b}.ser_main .item .desc{margin-top:20px;font-size:18px;color:#666666;line-height:30px}@media screen and (max-width:950px){.ser_main .item{margin-top:30px}.ser_main .item .img{padding-bottom:100%}.ser_main .item .title{font-size:24px}}