#notice {
    width: 220px;
    height: 120px;
    border-radius: 10px;
    background-image: url('../background1.png');  /* 设置背景图片 */
    background-size: cover;                   /* 让图片覆盖整个 div */
    background-position: center;              /* 背景图片居中 */
    line-height: 120px;
    text-align: center;
    position: fixed;
    z-index: 99;
}