:root { color-scheme: light; font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans JP", sans-serif; color: #182436; background: #f4f7fb; }
* { box-sizing: border-box; }
body { margin: 0; }
main { max-width: 820px; margin: 40px auto; padding: 40px 48px; background: #fff; border: 1px solid #dce5ef; border-radius: 16px; }
h1 { margin: 14px 0 18px; font-size: clamp(1.8rem, 5vw, 2.6rem); line-height: 1.3; overflow-wrap: anywhere; }
h2 { margin-top: 32px; font-size: 1.2rem; }
p, li { line-height: 1.9; }
li + li { margin-top: 6px; }
a { color: #165ba8; text-underline-offset: 3px; overflow-wrap: anywhere; }
a:hover { color: #103d70; }
a:focus-visible { outline: 3px solid #9cc9ff; outline-offset: 4px; }
.eyebrow { margin: 0; color: #335e8a; font-weight: 600; }
.lead { font-size: 1.25rem; color: #425a74; }
footer { margin-top: 36px; padding-top: 20px; border-top: 1px solid #dce5ef; }
@media (max-width: 600px) { main { margin: 0; padding: 28px 22px; border: 0; border-radius: 0; } }