css多背景平铺效果

// 从上至下平铺

background-repeat: no-repeat;

background-image: url('../../assets/images/spring/bg1.png'), url('../../assets/images/spring/bg2.png'), url('../../assets/images/spring/bg3.png');

background-size: 100% 30px, 100% calc(100% - 60px), 100% 30px;

background-position: top, 0px 30px ,bottom;