:root { --primary: #506780; --text: #333; --muted: #6b7280; --bg: #f2f3f5; --surface: #fff; }
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
header { background: var(--primary); padding: 16px; }
.logo { color: #fff; font-weight: 700; font-size: 20px; text-decoration: none; }
main { max-width: 760px; margin: 24px auto; background: var(--surface); padding: 24px 20px; border-radius: 12px; }
h1 { color: var(--primary); font-size: 26px; line-height: 1.3; margin-top: 0; }
h2 { color: var(--primary); font-size: 19px; margin-top: 28px; }
h3 { font-size: 16px; margin: 18px 0 4px; }
.stand { color: var(--muted); font-size: 14px; }
a { color: #14a3ea; }
footer { text-align: center; color: var(--muted); font-size: 14px; padding: 8px 16px 32px; }
@media (max-width: 800px) { main { margin: 0; border-radius: 0; } }