.video_container {
    position: relative;
    width: 100%;
    height: 90vh;
    overflow: hidden;
  }
  .bg_video {
    width: 100%;
    height: 100%; /* 更改为100%确保视频高度填满容器 */
    position: absolute;
    top: 0; /* 更新为0 */
    left: 0; /* 更新为0 */
    object-fit: cover; /* 添加这个属性 */
    z-index: -999;
  }
  .video_p {
    display: block;
  }
  .video_m {
    display: none;
  }
  @media only screen and (max-width: 1000px) {
    .video_m {
      display: block;
    }
    .video_p {
      display: none;
    }
  }
  
  .text-container {
    position: absolute;
    top: 0;
    margin-top: 26vh;
    opacity: 1;
    width: 100%;
    text-align: center;
    transition: 0.8s;
    z-index: 1;
  }
 
  @media only screen and (max-width: 576px) {
    .text-container {
      margin-top: 20vh;
    }
  }