*{box-sizing:border-box}body{margin:0;background:#f5f7fa;color:#182924;font-family:Arial,sans-serif;letter-spacing:0}header{display:flex;justify-content:space-between;gap:12px;align-items:center;border-bottom:1px solid #d4dfdb;padding:18px max(20px,calc((100% - 900px)/2));background:white}header a{font-weight:800;text-decoration:none;color:#145a46}header span{font-size:13px;color:#566760}main{max-width:900px;margin:auto;padding:28px 20px}h1{font-size:30px;line-height:1.2;margin:0 0 10px;text-align:center;overflow-wrap:anywhere}.intro{text-align:center;line-height:1.5;margin:0 0 24px}figure{margin:0}img{display:block;width:100%;height:auto;object-fit:contain;background:white}.purchase{text-align:center;padding:22px 0 0}.price{font-weight:700;font-size:22px}.buy{display:inline-flex;align-items:center;justify-content:center;gap:12px;max-width:100%;padding:16px 24px;background:#17624d;color:white;font-size:18px;font-weight:700;text-decoration:none;border-radius:4px}.terms,.timing{font-size:14px;line-height:1.6;max-width:690px;margin:18px auto;color:#40564d}.timing{border-top:1px solid #d5ddd9;padding-top:15px}footer{text-align:center;border-top:1px solid #d5ddd9;padding:22px;font-size:13px}@media(max-width:520px){header{padding:16px;align-items:start}header span{max-width:135px;text-align:right}main{padding:24px 14px}h1{font-size:25px}.buy{width:100%;font-size:17px;padding:17px 12px}.price{font-size:20px}}