.center-btn{text-align:center}.a{margin:0 auto}.k{white-space:pre-wrap}.tl{text-align:left}.radius{border-radius:15px}.bt{display:block;width:300px;padding:15px 0;margin:auto;background:#8f8f8f;color:#fff;text-decoration:none;text-align:center}.bt:hover{background:#a7a9a6}.back{display:block;width:300px;padding:15px 0;margin:auto;background:#b6aaf1;color:#fff;text-decoration:none;text-align:center}.back:hover{background:#e3dbf2}.line{border-bottom:1px solid #b8b8b8;padding:5px}.fl{display:flex;justify-content:center}.wi{width:90%}