:focus {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
	left: -9999px; /* 移到螢幕左邊很遠的地方 */
	top: auto;
  background: #000;
			width: 1px;
			height: 1px;  
  color: #fff;
  padding: 8px;
  z-index: 100;
}