:root {
  color-scheme: light;
  --canvas: #f4f5f7;
  --surface: #ffffff;
  --ink: #111317;
  --muted: #5d6573;
  --blue: #0954cc;
  --line: rgba(17, 19, 23, 0.12);
  --shadow: 0 22px 60px rgba(18, 28, 45, 0.1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--canvas);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); }

.shell {
  width: min(880px, calc(100% - 40px));
  margin-inline: auto;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(244, 245, 247, 0.92);
  backdrop-filter: blur(18px);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.back {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 650;
  text-decoration: none;
}

main { padding: 72px 0 96px; }

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(3.1rem, 8vw, 5.5rem);
  line-height: 0.94;
  letter-spacing: -0.06em;
}

.lede {
  max-width: 720px;
  margin: 0 0 16px;
  color: #303743;
  font-size: 1.2rem;
}

.effective {
  margin: 0 0 44px;
  color: var(--muted);
  font-size: 0.92rem;
}

.notice {
  margin: 0 0 24px;
  padding: 22px 24px;
  border: 1px solid rgba(9, 84, 204, 0.2);
  border-radius: 18px;
  background: #e9f1fe;
}

.notice strong { display: block; margin-bottom: 6px; }

article {
  padding: clamp(24px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

section + section {
  margin-top: 34px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.5rem;
  letter-spacing: -0.025em;
}

p { margin: 0 0 14px; }
p:last-child { margin-bottom: 0; }

ul {
  margin: 12px 0 0;
  padding-left: 22px;
}

li + li { margin-top: 9px; }

footer {
  padding: 28px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}

.footer-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
}

.footer-links {
  display: flex;
  gap: 18px;
}

.footer-links a { color: var(--muted); }

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, 880px); }
  main { padding: 52px 0 70px; }
  article { border-radius: 22px; }
  .back { font-size: 0.84rem; }
}