.training_item {
  margin-right: 60px;
}
.training_video_right.training_item {
  margin-right: 0px;
}
.training_item:nth-child(even) {
  margin-right: 0px;
}
.training_intro {
  width: 540px;
  height: 255px;
  padding-bottom: 23px;
  margin-top: 50px;
}
.training_intro:nth-child(even) {
  margin-top: 80px;
}
.training_intro > div {
  width: 100%;
  height: 100%;
  overflow-y: auto;
}
.training_introTitle {
  padding-bottom: 25px;
  color: #333333;
  position: relative;
  line-height: 40px;
}
.training_introTitle::after {
  content: '';
  position: absolute;
  left: 0px;
  bottom: 0px;
  width: 50px;
  height: 1px;
  border: 1px solid #004dc9;
}
.training_introDesc {
  color: #666666;
  line-height: 26px;
}
.training_video {
  width: 600px;
  height: 323px;
  position: relative;
}
.training_video:nth-child(odd) {
  height: 345px;
}
.training_videoRight_bg {
  width: 540px;
  height: 285px;
  position: absolute;
  top: 38px;
  left: 60px;
  background-color: #0161d9;
}
.training_videoLeft_bg {
  width: 570px;
  height: 315px;
  position: absolute;
  top: 0px;
  left: 0px;
  background: url(../images/training_videoLeft_bg.png) 50% 50% no-repeat;
  background-size: cover;
}
.training_videoContent_left.training_videoContent {
  top: 60px;
  left: 30px;
}
.training_video_item,
.training_videoCover,
.training_videoCover_img,
.training_videoContent {
  width: 570px;
  height: 285px;
  position: absolute;
  top: 0px;
  left: 0px;
  object-fit: cover;
}
.training_videoCover_play {
  width: 70px;
  height: 70px;
}
.training_video_item {
  display: none;
}
.training_list + .training_list {
  margin-top: 55px;
}

@media (max-width: 767px) {
  .training_intro {
    margin-top: 20px;
  }
  .training_list + .training_list {
    margin-top: 0px;
  }
  .training_item {
    width: 100%;
    margin-right: 0;
    float: none;
  }
  .training_intro {
    width: 100%;
    height: auto;
    padding-bottom: 20px;
  }
  .training_intro:nth-child(even) {
    margin-top: 0;
  }
  .training_intro > div {
    height: auto;
    overflow-y: visible;
  }
  .training_introTitle {
    padding-bottom: 10px;
    line-height: 1;
  }
  .training_introDesc {
    line-height: 24px;
    margin-top: 10px;
  }

  .training_videoRight_bg,
  .training_videoLeft_bg {
    display: none;
  }
  .training_video,
  .training_video:nth-child(odd) {
    width: 100%;
    height: auto;
    min-height: 200px;
  }
  .training_videoCover_img,
  .training_videoCover {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }
  .training_video_item {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }
  .training_videoContent,
  .training_videoContent_left {
    width: 100%;
    height: 200px;
    position: relative;
  }
  .training_videoContent_left.training_videoContent {
    top: 0px;
    left: 0px;
  }

  .training_videoCover_play {
    width: 60px;
    height: 60px;
  }
  .training_video_right {
    margin-top: 20px;
    padding-bottom: 10px;
  }
}