*{margin:0;padding:0;box-sizing:border-box}header{background:#000;height:80px;line-height:80px;padding-left:30px;color:#fff;font-weight:700}.list{border-bottom:1px solid #ddd;padding:10px 20px}.list h4{margin-bottom:8px}.modal{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:500px;height:500px;border:1px solid #bbb;border-radius:10px;padding:20px;background:#eee}