如果要求一个元素影响另一个元素的背景，则需要 JS.假设 id="news" 是触发元素，id="BG" 是接收元素:

If the requirement is that one element affects the background of another, you will require JS. Assuming id="news" is the triggering element and id="BG" is the receiving element:

document.getElementById("news").addEventListener("mouseover", function() {
  document.getElementById("BG").style.backgroundImage = "url(img/southamericangrandmother.jpg)";
}, false);
document.getElementById("news").addEventListener("mouseout", function() {
   document.getElementById("BG").style.backgroundImage = "";
}, false);