body{overflow-y:auto}.online-back{width:calc(100% - 40px);margin:10px;padding:10px;background:#fbf9f9;box-shadow:9px 2px 16px 0 rgba(165,144,144,.36);text-align:left}.online-back .info-title{font-size:18px;font-weight:700;text-align:left}.online-back .division-line{width:100%;height:1px;background-color:#dfdfdf}.online-back .but-back{width:135px;height:36px;background-color:#b11117;border-radius:5px;margin:auto;text-align:center;line-height:36px;color:#fff;cursor:pointer}.online-back .but-back-post{position:fixed;bottom:30px;left:0;right:0}