<div style="margin:0; padding:20px; display:flex; justify-content:center; align-items:center; height:100vh; background-color:#f5f5f5; font-family:Arial, sans-serif;">
  <div style="width:90%; max-width:400px; background-color:white; border-radius:8px; box-shadow:0 2px 10px rgba(0,0,0,0.1); padding:20px; text-align:center;">
    <div style="margin-bottom:20px;">
      <span style="display:inline-block; width:50px; height:50px; line-height:50px; border-radius:50%; background-color:#ffecec; color:#ff4757; font-size:24px; font-weight:bold;">!</span>
    </div>
    <h2 style="margin:0 0 10px; color:#2f3542;">余额提醒</h2>
    <p style="margin:0 0 20px; color:#57606f;">您的账户余额{{.balance}}已不足{{.balanceNotify}}元，请及时充值</p>
  </div>
</div>