/* 默认浅色模式：覆盖所有页面顶部 banner 背景图 */
#page-header {
    background-image: url('https://cdn.jsdelivr.net/gh/o0wde0o/blog-image@main/background/wallhaven-wqery6-light.jpg') !important;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
  }
  
  /* 深色模式下的头图 */
  [data-theme="dark"] #page-header {
    background-image: url('https://cdn.jsdelivr.net/gh/o0wde0o/blog-image@main/background/wallhaven-wqery6-dark.jpg') !important;
  }
  
  /* 保证头图透明，不遮挡背景 */
  #page-header::before {
    background: transparent !important;
  }