.subtitle-btn {
  color: #fff;
  line-height: 22px;
  font-size: 14px;
  cursor: pointer;
}

.subtitle-btn i {
  margin-right: 5px;
}

.layui-layer {
  /* min-width: 688px; */
  width: 35%;
  border-radius: 12px;
}

.lang-layer-content {
  padding: 0 27px 86px 27px;
}

.lang-layer-content .title {
  font-size: 16px;
  font-weight: 600;
  margin-top: 30px;
}
.lang-item {
  display: inline-block;
  margin-top: 26px;
  width: 25%;
  cursor: pointer;
}

.lang-item.active {
  color: #0E3AFF;
}

.lang-item i {
  font-size: 12px;
}

.bottom-wrap {
  display: flex;

  width: 1400px;
  margin: 20px auto 0;

  background: linear-gradient(180deg, #FFFFFF 0%, #F9FBFF 94%);
}

.bottom-wrap .vod-comment.wrap {
  width: 988px;
}



#AI-teacher .loading {
  width: 3px;
  height: 5px;
  display: inline-block;
  position: relative;
  border-radius: 4px;
  left: -20px;

  padding: 0;
  animation: loading-animation 1s linear infinite alternate;
}

@keyframes loading-animation {
  0% {
    box-shadow: 10px 0 rgba(255, 255, 255, 0), 20px 0 rgba(255, 255, 255, 0),
      30px 0 rgba(255, 255, 255, 0), 40px 0 rgba(255, 255, 255, 0),
      50px 0 rgba(255, 255, 255, 0);
  }

  20% {
    box-shadow: 10px 0 #ddd, 20px 0 rgba(255, 255, 255, 0),
      30px 0 rgba(255, 255, 255, 0), 40px 0 rgba(255, 255, 255, 0),
      50px 0 rgba(255, 255, 255, 0);
  }

  40% {
    box-shadow: 10px 0 #ddd, 20px 0 #ddd, 30px 0 rgba(255, 255, 255, 0),
      40px 0 rgba(255, 255, 255, 0), 50px 0 rgba(255, 255, 255, 0);
  }

  60% {
    box-shadow: 10px 0 #ddd, 20px 0 #ddd, 30px 0 #ddd,
      40px 0 rgba(255, 255, 255, 0), 50px 0 rgba(255, 255, 255, 0);
  }

  80% {
    box-shadow: 10px 0 #ddd, 20px 0 #ddd, 30px 0 #ddd, 40px 0 #ddd,
      50px 0 rgba(255, 255, 255, 0);
  }

  100% {
    box-shadow: 10px 0 #ddd, 20px 0 #ddd, 30px 0 #ddd, 40px 0 #ddd, 50px 0 #ddd;
  }
}