.video-page {
  max-width: 80vw;
  margin: 30px auto 10px;
  padding: 0 16px;
}

.video-grid {
  display: grid;
  grid-template-columns: 1fr; /* 始终保持单列 */
  gap: 20px;
}

.media-panel {
  background: #fff;
  border-radius: 0;
  padding: 14px;
}

.media-panel h2 {
  margin: 0 0 10px;
  font-size: 18px;
  color: #243447;
}

.media-panel img,
.media-panel video,
.media-panel iframe {
  width: 100%;
  border-radius: 0;
  display: block;
}

.pdf-frame {
  min-height: 860px;
  border: none;
}

.empty-tip {
  text-align: center;
  color: #647384;
  padding: 10px 0;
}