背景 透明背景 background: rgba(255,255,255,0.0); css样式属性大全，透明：opacity: ;0.0------0.9 边框： 下边框 border-bottom:1px solid #09BB07;

#random_box li:nth-child(odd) {//双行background: #fff5c4;}#random_box li:nth-child(even) {//单行background: #ffeb8c;} 转载于:https://www.cnblogs.com/Jerrycjc/p/5785003.html