/* 定义动画 */ @key-frames mui-loading-ani { 0% { background-position: 0 -40px } 10% { background-position: 0 -80px } 20% { background-position: 0 -120px } 30% { background-position: 0 -160px } 40% { background-position: 0 -200px } /* 省略 */ }