.con4{ width: 300px; height: auto; overflow: hidden; margin: 20px auto; color: #FFFFFF; } .con4 .btn{ width: 100%; height: 40px; line-height: 40px; text-align: center; background: #d8b49c; display: block; font-size: 16px; border-radius: 5px; } .upload{ float: left; position: relative; } .upload_pic{ display: block; width: 100%; height: 40px; position: absolute; left: 0; top: 0; opacity: 0; border-radius: 5px; } #cvs{ border: 1px solid #000; margin:20px 0 20px 50px; }