.recruit-video {
  position: relative;
  width: 100%;
  max-width: 800px;
  margin: 0 auto;   /* 中央配置 */
  aspect-ratio: 16 / 9;   /* 1920×1080比率 */
}

.recruit-video iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}