body { margin: 0; background: #f4f7f8; color: #263943; font-family: system-ui, sans-serif; line-height: 1.9; }
main { max-width: 800px; margin: auto; padding: 40px 24px; background: white; }
h1 { font-size: 1.6rem; } h2 { font-size: 1.2rem; border-bottom: 1px solid #cbd6db; padding-bottom: 10px; }
a { color: #235d78; } .notice { border-left: 4px solid #a26027; padding: 12px 18px; background: #fff6e7; }