*{margin:0}.qa-base{width:100%;margin:0 auto;font-family:PingFangSC-Regular}.qa-base ul li{line-height:26px;font-size:14px;margin-top:16px}.qa-base ul li:first-child{margin:0}.qa-base ul li .problems{position:relative;line-height:24px;font-size:16px;color:#181818}.qa-base ul li .problems b{width:20px;height:20px;line-height:20px;text-align:center;font-size:12px;color:#fff;border-radius:50%;position:absolute;top:50%;left:-35px;transform:translateY(-50%)}.qa-base ul li .content{font-size:14px;display:block;margin-top:8px;line-height:24px;color:#595959}