:root {
  --brand: #1b3a5c; --spark: #e8891c; --bg: #ffffff; --bg-soft: #f4f7fa; --fg: #0f1f33; --muted: #5b6b7c; --line: #e2e8ee; --accent: #1f4e7a;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --brand: #ffffff; --spark: #f29a3a; --bg: #0a1422; --bg-soft: #0d1929; --fg: #e6edf5; --muted: #93a3b5; --line: #213349; --accent: #7fb0e0; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font-family: "Archivo", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif; font-size: 16px; line-height: 1.65; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); }
.wrap { width: 100%; max-width: 760px; margin: 0 auto; padding-left: 20px; padding-right: 20px; }
header { border-bottom: 1px solid var(--line); background: var(--bg-soft); }
header .wrap { display: flex; align-items: center; min-height: 64px; }
.logo { display: inline-flex; align-items: center; gap: 9px; color: var(--fg); text-decoration: none; font-size: 20px; letter-spacing: -0.03em; line-height: 1; }
.logo svg { width: 28px; height: 28px; color: var(--brand); }
.logo b { font-weight: 800; }
.logo i { font-style: normal; font-weight: 800; color: var(--spark); }
main { padding-top: 40px; padding-bottom: 64px; }
h1 { font-size: clamp(30px, 6vw, 40px); line-height: 1.1; font-weight: 800; letter-spacing: -0.03em; margin: 0 0 8px; }
h2 { font-size: 19px; font-weight: 700; margin: 32px 0 8px; letter-spacing: -0.01em; }
p, ul { margin: 0 0 12px; }
ul { padding-left: 22px; }
.stand { color: var(--muted); }
.back { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); }