:root {
  --bg: #f6faf6;
  --panel: #ffffff;
  --text: #1e2a22;
  --muted: #647166;
  --line: #dbe8dd;
  --soft: #edf6ef;
  --accent: #4d6a53;
  --shadow: 0 16px 40px rgba(47, 73, 55, 0.08);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  min-height: 100vh;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: radial-gradient(circle at top left, #f8fff8 0, #f6faf6 38%, #f2f7f3 100%);
}

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

.shell {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.site-header,
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.site-header {
  padding: 8px 4px 0;
}

.site-footer {
  padding: 18px 4px 0;
  margin-top: 24px;
  border-top: 1px solid var(--line);
}

.brand-link {
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.header-nav,
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
}

.header-nav a,
.footer-nav a {
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
}

.header-nav a:hover,
.footer-nav a:hover {
  text-decoration: underline;
}

.hero,
.content-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero {
  margin-top: 20px;
  padding: 32px 28px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--accent);
  border: 1px solid var(--line);
  background: var(--soft);
  border-radius: 999px;
  padding: 8px 12px;
  margin-bottom: 14px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(28px, 5vw, 50px);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 760px;
}

.content-stack {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.content-card {
  padding: 24px 28px;
}

.content-card h2 {
  margin: 0 0 12px;
  font-size: 24px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.content-card h3 {
  margin: 18px 0 8px;
  font-size: 17px;
}

.content-card p,
.content-card li {
  color: #304034;
  font-size: 15px;
  line-height: 1.85;
}

.content-card p {
  margin: 0;
}

.content-card p + p {
  margin-top: 12px;
}

.content-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.content-card li + li {
  margin-top: 8px;
}

.grid {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tile {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  background: linear-gradient(180deg, #ffffff, #fbfefb);
}

.tile h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.tile p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

@media (max-width: 860px) {
  .grid.two {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .shell {
    padding: 14px 12px 42px;
  }

  .hero,
  .content-card {
    padding: 18px;
  }

  .hero h1 {
    font-size: 32px;
  }
}