*{box-sizing:border-box}
body{margin:0;background:#f5f7fb;font-family:Arial,"Noto Sans KR",sans-serif;color:#1b2430}
main{max-width:860px;margin:36px auto;padding:34px;background:#fff;border-radius:18px;box-shadow:0 2px 16px rgba(0,0,0,.08)}
h1{margin-top:0;color:#123a78}
h2{margin-top:26px;color:#1d4db8}
p{line-height:1.8}
.cta{margin-top:28px;padding:20px;background:#eef4ff;border-radius:14px}
.cta strong{font-size:24px;color:#1d4db8}
.back{display:inline-block;margin-top:20px;padding:12px 16px;background:#1d4db8;color:#fff;border-radius:10px;text-decoration:none}