AI_Change_code/miniProgram/pages/example/index.wxss

/* pages/example/index.wxss */
.container{
  overflow: hidden;
}
.container>video{
  height: 100%;
  width: 100%;
  position: fixed;
}

.ai_bottom{
  width: 280rpx;
  display: inline-block;
  text-align: center;
  position: fixed;
  bottom: 8%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0;
  z-index: 999;
}

.ai_bottom > image{
  width: 100%;
  margin: 0 auto;
  display: inline-block;
}

.ai_bottom > text{
  font-size: 28rpx;
  display: inline-block;
  color: #fff;
  position: absolute;
  top: 50%;
  left: 50%;
  line-height: 100%;
  transform: translate(-50%,-50%);
}