:root {
  color-scheme: light;
  --paper: #f3f1e9;
  --paper-deep: #e8e5da;
  --ink: #17211e;
  --muted: #68736e;
  --line: rgba(23, 33, 30, 0.14);
  --accent: #087b65;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Noto Sans CJK SC", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0, transparent calc(50% - 341px), rgba(8, 123, 101, 0.08) calc(50% - 340px), transparent calc(50% - 339px)),
    var(--paper);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  padding: 16px max(24px, calc((100vw - 680px) / 2));
  border-bottom: 1px solid var(--line);
}

.page-header > p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}

.brand span {
  display: flex;
  flex-direction: column;
}

.brand strong {
  font-size: 16px;
  letter-spacing: 0.08em;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 9px;
  letter-spacing: 0.1em;
}

main {
  width: min(100% - 48px, 680px);
  margin: 0 auto;
}

.intro {
  padding: 72px 0 55px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

h1 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(40px, 8vw, 68px);
  font-weight: 650;
  letter-spacing: -0.065em;
  line-height: 1.05;
}

.lede {
  max-width: 600px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

section:not(.intro) {
  padding: 30px 0 34px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 12px;
  font-size: 20px;
  letter-spacing: -0.025em;
}

p,
dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
}

code {
  padding: 2px 5px;
  border-radius: 4px;
  color: #045948;
  background: rgba(8, 123, 101, 0.08);
  font-size: 0.92em;
}

dl {
  margin: 0;
}

dl div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

dl div:last-child {
  border-bottom: 0;
}

dt,
dd {
  margin: 0;
}

.english {
  margin-bottom: 64px;
}

footer {
  padding: 22px 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--paper-deep);
  text-align: center;
  font-size: 11px;
}

@media (max-width: 560px) {
  .page-header > p {
    display: none;
  }

  .intro {
    padding-top: 52px;
  }

  dl div {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}