:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --ink: #1b1b1a;
  --muted: #6b6b66;
  --line: #e6e3dc;
  --accent: #0f766e;
  --accent-ink: #ffffff;
  --radius: 16px;
  --max: 960px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  background-image: radial-gradient(60rem 30rem at 50% -10rem, #eef5f2 0%, transparent 70%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 20px;
  font-size: 0.95rem;
  color: var(--muted);
}

.nav a:hover {
  color: var(--ink);
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.hero {
  padding: 72px 0 80px;
  max-width: 640px;
}

.eyebrow {
  margin: 0 0 20px;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  color: var(--accent);
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(2.1rem, 6vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.lead {
  margin: 0 0 32px;
  font-size: 1.05rem;
  color: var(--muted);
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  font-weight: 600;
  transition: transform 0.15s ease, background-color 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover {
  background: #0b5f58;
}

.btn-ghost {
  border-color: var(--line);
  background: var(--surface);
}

.btn-ghost:hover {
  border-color: var(--muted);
}

.section {
  padding: 40px 0;
  border-top: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 16px;
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.section p {
  margin: 0;
  max-width: 620px;
  color: var(--muted);
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.card {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.card p {
  margin: 0 0 16px;
  font-size: 0.92rem;
  color: var(--muted);
}

.card a {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 600;
}

.contact {
  margin-top: 8px;
  padding: 40px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.contact p {
  margin-bottom: 24px;
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 640px) {
  .hero {
    padding: 48px 0 56px;
  }

  .contact {
    padding: 28px;
  }
}