:root {
  --bg: #fff;
  --bg-warm: #f6f5f4;
  --ink: rgba(0, 0, 0, 0.95);
  --muted: #615d59;
  --faint: #a39e98;
  --line: rgba(0, 0, 0, 0.1);
  --blue: #0075de;
  --shadow: rgba(0,0,0,0.04) 0 4px 18px, rgba(0,0,0,0.027) 0 2px 8px, rgba(0,0,0,0.02) 0 1px 3px;
  --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Noto Sans SC", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  font-feature-settings: "lnum" 1;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
}
.mark { font-weight: 700; letter-spacing: -0.4px; }
.nav nav { display: flex; gap: 22px; }
.nav a { font-size: 15px; font-weight: 600; }
.nav nav a:hover { color: var(--blue); }
.hero, .wrap { max-width: var(--max); margin: 0 auto; padding: 72px 28px; }
.hero { padding-top: 64px; padding-bottom: 28px; }
.kicker {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
}
h1 {
  margin: 0;
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2.1px;
}
h2 {
  margin: 0 0 28px;
  font-size: 40px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -1.2px;
}
h3 { margin: 0 0 10px; font-size: 26px; letter-spacing: -0.6px; line-height: 1.23; }
.lede {
  max-width: 640px;
  margin: 22px 0 28px;
  font-size: 20px;
  font-weight: 500;
  line-height: 1.4;
  letter-spacing: -0.12px;
  color: var(--muted);
}
.hero-fig {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--bg-warm);
}
.hero-fig img { width: 100%; height: auto; }
.cap { margin: 12px 2px 0; font-size: 14px; color: var(--muted); }
.band { background: var(--bg-warm); }
.band .wrap { padding-top: 72px; padding-bottom: 72px; }
.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.metrics article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px 20px 20px;
  box-shadow: var(--shadow);
}
.num {
  margin: 0 0 8px;
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1;
}
.num span { font-size: 18px; letter-spacing: 0; margin-left: 4px; color: var(--muted); }
.metrics p:last-child { margin: 0; color: var(--muted); font-size: 15px; }
.spec {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 36px;
  align-items: center;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}
.spec figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg-warm);
}
.spec img { width: 100%; aspect-ratio: 1; object-fit: cover; }
.latin {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--faint);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.spec p { margin: 0 0 14px; color: var(--ink); }
.facts { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px; }
.facts li {
  font-size: 13px;
  font-weight: 500;
  color: #097fe8;
  background: #f2f9ff;
  border-radius: 999px;
  padding: 4px 10px;
}
.facts b { font-weight: 600; }
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.steps li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 16px;
}
.steps b { display: block; font-size: 18px; letter-spacing: -0.3px; margin-bottom: 8px; }
.steps span { color: var(--muted); font-size: 14px; }
.cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.cols p { margin: 0; }
.src {
  margin: 36px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--faint);
}
footer {
  display: flex;
  justify-content: space-between;
  padding: 22px 28px 32px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 13px;
}
@media (max-width: 860px) {
  h1 { font-size: 40px; letter-spacing: -1.2px; }
  h2 { font-size: 28px; letter-spacing: -0.7px; }
  .metrics, .steps, .cols { grid-template-columns: 1fr; }
  .spec, .spec.flip { grid-template-columns: 1fr; gap: 16px; }
  .nav nav { display: none; }
  .hero, .wrap, .band .wrap { padding-left: 18px; padding-right: 18px; }
}