.video-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
  z-index: 0;

  &::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.4);
    z-index: 1;
    transition: 
      opacity 1.2s cubic-bezier(0.4, 0, 0.2, 1),
      backdrop-filter 1.2s ease; /* 分离过渡属性 */
    backdrop-filter: blur(20px);/* 毛玻璃效果 */
  }

  &.video-loaded::before {
    opacity: 0;
    backdrop-filter: blur(0);
  }
}

.video-container video {
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  object-fit: cover;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

body {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 确保内容显示在视频上方 */
main, footer {
  position: relative;
  z-index: 1;
  background: transparent;
}

/* 覆盖原有header样式 */
header.navbar {
  position: fixed !important;  /* 固定定位 */
  top: 0;
  width: 100%;
  z-index: 1000 !important;    /* 必须高于视频容器 */
}


/* 移动端适配 */
@media (max-aspect-ratio: 16/9) {
  .video-container video {
    width: auto;
    height: 100%;
  }
}

@media (min-aspect-ratio: 16/9) {
  .video-container video {
    width: 100%;
    height: auto;
  }
}