body{font-family:Arial;margin:0;background:#f4f8fc}header{background:#0B4F8A;color:#fff;padding:50px;text-align:center}.btn{display:inline-block;margin:8px;padding:12px 20px;background:#0B4F8A;color:#fff;text-decoration:none;border-radius:8px}.wa{background:#25D366}main{max-width:900px;margin:auto;padding:20px}section{background:#fff;margin:20px 0;padding:20px;border-radius:10px}.float{position:fixed;right:20px;bottom:20px;background:#25D366;color:#fff;text-decoration:none;width:60px;height:60px;line-height:60px;text-align:center;border-radius:50%;font-size:30px}footer{text-align:center;padding:20px}