.OperationVideo .el-dialog{border-radius:12px;height:696px;width:1000px;background-repeat:no-repeat;background-position:50%;background-size:cover;background-image:url(/img/course/diabg1.png)}.OperationVideo .el-dialog video{border-radius:12px;margin-top:50px;margin-left:25px}.helpConter{width:1200px;margin:0 auto;padding:10px 0;border-top:1px solid #f0f0f0;background-color:#fff;margin-top:20px;border-radius:12px;padding:15px}.helpConter .el-card{padding:18px 15px;background-color:#f5faff;border-radius:12px;margin-bottom:20px;border:0}.helpConter .el-card .el-card__header{border-bottom:0;padding:18px 10px}.helpConter .el-card .text_item{border-radius:8px;float:left;background-color:#fff;margin:5px 5px;width:345px;height:56px;padding:12px 10px}.helpConter .el-card .text_item .el-image{vertical-align:middle;margin-right:10px}.helpConter .el-card .tool_item{border-radius:8px;float:left;background-color:#fff;margin:5px 5px;width:254px;height:56px;padding:16px 10px 10px 10px}.helpConter .el-card .tool_item .el-image{vertical-align:middle;margin-right:10px}