/* 页脚与头图半透明 */
#footer {
  background: rgba(102,204,255,0.9) !important;
}
#page-header {
  background: rgba(102,204,255,0.9) !important;
}

/* 白天模式遮罩透明 */
#footer::before {
  background: transparent !important;
}
#page-header::before {
  background: transparent !important;
}

/* 夜间模式遮罩透明 */
[data-theme="dark"] #footer::before {
  background: transparent !important;
}
[data-theme="dark"] #page-header::before {
  background: transparent !important;
}