:root{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:#243247;background:#f3f6fa;font-size:16px;line-height:1.7}
*{box-sizing:border-box}body{margin:0;min-height:100dvh;display:grid;place-items:center;padding:24px}main{max-width:620px;width:100%;background:#fff;padding:36px;border:1px solid #dde5ef;border-radius:20px}.brand{color:#496789;font-size:14px;font-weight:600}h1{font-size:26px;line-height:1.4;margin:12px 0}h2{font-size:19px;margin:0}section{margin:24px 0;padding:20px;background:#f1f6fd;border-radius:12px}section p{margin-bottom:0}button{min-height:44px;background:#245ec5;border:0;border-radius:8px;color:#fff;font:inherit;padding:8px 24px;cursor:pointer}button:disabled{opacity:.6;cursor:wait}button:focus-visible,a:focus-visible{outline:3px solid #de9c27;outline-offset:4px}.note{font-size:14px;color:#526179;margin:24px 0 0}@media(max-width:480px){body{padding:16px}main{padding:24px}h1{font-size:23px}}