:root {
  color-scheme: light;
  --ink: #17212b;
  --muted: #5d6875;
  --line: #d8e0e8;
  --paper: #f7f9fb;
  --panel: #ffffff;
  --accent: #0d7f7a;
  --accent-strong: #095f5b;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px;
}

.hero {
  width: min(920px, 100%);
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 48px;
  align-items: center;
  padding: 48px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 20px 60px rgba(23, 33, 43, 0.08);
}

.signal {
  width: 220px;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.signal svg {
  width: 100%;
  height: 100%;
}

.signal rect {
  fill: #e8f4f2;
  stroke: var(--accent);
  stroke-width: 6;
}

.signal path,
.signal circle {
  fill: var(--accent-strong);
}

.copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent-strong);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

h1 {
  margin: 0;
  max-width: 12em;
  font-size: clamp(36px, 6vw, 72px);
  line-height: 1.05;
  letter-spacing: 0;
}

.lead {
  margin: 24px 0 0;
  max-width: 34em;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
}

@media (max-width: 720px) {
  .page {
    padding: 20px;
    place-items: start center;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 28px;
  }

  .signal {
    width: min(180px, 70vw);
  }

  h1 {
    font-size: 40px;
  }
}