.container {
  margin: 0rpx 30rpx;
  width: calc(100% - 60rpx);
  padding: 0 0;
}

.header {
  width: calc(100% - 40rpx);
  background-color: #fff;
  padding: 20rpx;
  border-radius: 10rpx;
  margin-bottom: 20rpx;
}

.file-preview {
  width: 100%;
  height: 400rpx;
  margin-bottom: 20rpx;
  position: relative;
}

.file-previews {
  width: 100%;
  margin-bottom: 20rpx;
  position: relative;
}

.play-button {
  width: 100%;
  text-align: center;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 38rpx;
  font-weight: bold;
  color: #333333;
}

.course-videos {
  width: 100%;
  height: 100%;
  text-align: center;
}

video, audio {
  width: 100%;
  height: 100%;
  object-fit: cover;
  margin-bottom: 20rpx;
}

.header text {
  display: block;
  margin-bottom: 10rpx;
}

.video-preview {
  width: 100%;
  position: relative;
  background-color: #ddd;
  border-radius: 10rpx;
  margin-bottom: 20rpx;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.buttons {
  width: 100%;
  display: flex;
  justify-content: space-between;
  margin-bottom: 20rpx;
}

.preview-btns, .download-btn {
  /* background-color: #409eff; */
  /* color: white; */
  border: none;
  padding: 15rpx 0 !important;
  border-radius: 40rpx;
  width: 30% !important;
  height: 70rpx;
  font-size: 28rpx;
  font-weight: 500;
}

.yulan {
  background: #409eff;
  color: #fff;
  border: 1rpx solid #409eff;
}

.shoucang {
  background: #edecec !important;
  border: 1rpx solid #edecec !important;
}

.shoucangs {
  background: #ffaa2b;
  border: 1rpx solid #ffaa2b;
  color: #fff;
}

.xiazai {
  background: #ecf5ff;
  color: #409eff;
  border: 1rpx solid #9fceff;
}

.related-courses {
  width: 100%;
  padding: 20rpx;
  border-radius: 10rpx;
  font-size: 34rpx;
}

.course-list{
  width: 100%;
  margin-top: 20rpx;
  display: flex;
  flex-wrap: wrap;
}

.card {
  width: 48%;
  margin-right: 4%;
  margin-bottom: 20rpx;
  background-color: #fff;
  border-radius: 12rpx;
  overflow: hidden;
  box-shadow: 0 2rpx 6rpx rgba(0, 0, 0, 0.1);
}

.card:nth-child(2n) {
  margin-right: 0;
}

.label {
  width: 60rpx;
  height: 43rpx;
  text-align: center;
  line-height: 45rpx;
  font-size: 26rpx;
  padding: 5rpx 16rpx;
  border-radius: 40rpx;
}
.label.PDF { background: #ffeaea; color: #ff4d4f; border: 1rpx solid #fde2e2;}
.label.shipin { background: #e6f7ff; color: #1890ff; border: 1rpx solid #d9ecff;}
.label.yinpin { background: #f6ffed; color: #52c41a; border: 1rpx solid #e1f3d8;}
.label.PPT { background: #fff7e6; color: #faad14; border: 1rpx solid #fde2e2;}

.preview-btn {
  flex: 1;
  background-color: #409eff;
  color: #fff;
  border: none;
  border-radius: 40rpx;
  padding: 12rpx 0;
  font-size: 32rpx;
  display: flex;
  justify-content: center;
  align-content: center;
}

.cardimg {
  width: 100%;
  height: 300rpx;
  background: papayawhip;
  border-radius: 12rpx;
  position: relative;
}

.labelwg {
  position: absolute;
  top: 16rpx; 
  left: 16rpx;
}


.info {
  display: flex;
  justify-content: space-between;
  padding-top: 16rpx;
  font-size: 26rpx;
}

.title_box.list {
  width: 320rpx;
  height: 100%;
  margin-right: 80rpx;
}

.item-content {
  padding: 20rpx;
}

.item-title {
  font-size: 32rpx;
  color: #333;
  margin-bottom: 10rpx;
}

.item-subtitle {
  font-size: 28rpx;
  color: #666;
  margin-bottom: 10rpx;
}

.item-download-count {
  font-size: 24rpx;
  color: #999;
  margin-bottom: 20rpx;
}

.item-buttons {
  display: flex;
  align-items: center;
  align-content: center;
}

.download-icon {
  width: 45rpx;
  height: 40rpx;
  margin-left: 20rpx;
}

.download-icons {
  width: 45rpx;
  height: 40rpx;
  margin-right: 20rpx;
}

.group-options {
  display: flex;
  justify-content: space-between;
  margin-top: 20rpx;
  width: 100%;
}

.option {
  text-align: center;
  margin-top: 20rpx;
  display: flex; 
  align-items: center; 
  flex-direction: column;
}

.option-icon {
  width: 80rpx;
  height: 80rpx;
  border-radius: 50%;
}

.option-text {
  font-size: 28rpx;
  color: #666;
  margin-top: 16rpx;
}

.course-lists {
  display: flex;
  flex-direction: column;
  gap: 20rpx;
  margin-top: 20rpx;
}

.course-items {
  background-color: #fff;
  border-radius: 8rpx;
  overflow: hidden;
}

.course-infos {
  padding: 20rpx;
}

.course-titles {
  font-size: 36rpx;
  font-weight: bold;
  color: #333;
  margin-bottom: 10rpx;
}

.course-descriptions {
  font-size: 28rpx;
  color: #666;
  line-height: 1.5;
}

.download-iconss {
  width: 30rpx;
  height: 30rpx;
  margin-right: 15rpx;
}