:root { color-scheme: light; font-family: system-ui, -apple-system, "Segoe UI", sans-serif; color: #18232a; background: #fff; }
* { box-sizing: border-box; }
body { margin: 0; border-top: 5px solid #159da6; }
main { width: min(760px, 100%); margin: 0 auto; padding: 64px 24px 32px; }
.logo { display: block; border-radius: 8px; }
.brand { color: #087b83; font-weight: 700; margin: 20px 0 28px; }
h1 { font-size: 36px; line-height: 1.2; letter-spacing: 0; font-weight: 650; margin: 0 0 24px; overflow-wrap: anywhere; }
.intro { font-size: 20px; line-height: 1.6; margin-bottom: 28px; }
a { color: #076872; text-underline-offset: 4px; overflow-wrap: anywhere; }
a:focus-visible { outline: 3px solid #bb7900; outline-offset: 5px; }
.download { display: inline-flex; gap: 20px; align-items: center; padding: 16px 0; border-bottom: 2px solid #159da6; font-weight: 700; text-decoration: none; }
.download span { font-size: 26px; }
.detail { font-size: 15px; line-height: 1.7; color: #506069; margin: 24px 0; }
nav { display: flex; flex-wrap: wrap; gap: 16px 24px; border-top: 1px solid #dce5e6; padding-top: 24px; margin-top: 36px; }
footer { color: #647078; font-size: 13px; margin-top: 32px; }
@media (max-width: 480px) { main { padding: 36px 20px 24px; } h1 { font-size: 28px; } .intro { font-size: 18px; } }