03.灵活背景定位

   .box{
         width: 400px;
         height: 400px;
         background: url(./images/IMG_7667\(20210904-095315\).JPG) no-repeat #58a;
         background-size: 400px 400px;
         padding: 10px;
         background-position: right 20px bottom 10px;
         background-origin: content-box;
     }