.np-bilibili-video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  overflow: hidden;
}

.np-bilibili-video-wrap iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

@supports not (aspect-ratio: 16 / 9) {
  .np-bilibili-video-wrap {
    height: 0;
    padding-bottom: 56.25%;
  }

  .np-bilibili-video-wrap iframe {
    position: absolute;
    top: 0;
    left: 0;
  }
}