.reader{font-size:16px}.reader .sweep{position:relative;margin:20px;padding:12px;width:300px;font-size:18px;cursor:pointer;color:#fff;background:#42b983;border:1px solid #42b983;overflow:hidden}.reader .sweep input{position:absolute;font-size:100px;opacity:0}.reader .imgurl{margin:20px;text-align:center}.reader .imgurl img{margin:20px;width:280px;height:260px}.reader .imgurl img,.reader .result{padding:10px;border:1px solid grey;border-radius:8px}.reader .result{box-sizing:border-box;font-size:16px}.reader .canvas{display:none;box-sizing:border-box;position:fixed;top:0;right:0;bottom:0;left:0;width:100vw;height:100vh}