:root {
  --bg: #f5f2e8;
  --card: #ffffff;
  --text: #142019;
  --muted: #5b685f;
  --brand: #267a45;
  --line: #d9dfd7;
  --soft: #eef8ef;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 56px;
}

.site-header {
  background: #0f392c;
  color: #fff;
  border-radius: 18px;
  padding: 24px 20px;
  box-shadow: 0 14px 36px rgba(15, 57, 44, 0.2);
}

.site-header h1 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0.4px;
}

.site-header p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: 15px;
}

.nav {
  margin-top: 16px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav a {
  color: #fff;
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 14px;
}

main {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 18px;
  box-shadow: 0 4px 18px rgba(24, 44, 86, 0.06);
}

.proof-card {
  border-color: #9bc9aa;
  background: #f7fcf8;
}

.card h2 {
  margin: 0 0 8px;
  font-size: 20px;
}

.card h3 {
  margin: 18px 0 6px;
  font-size: 17px;
}

.card p,
.card li {
  font-size: 15px;
  color: var(--text);
}

.meta {
  background: var(--soft);
  border: 1px dashed #9bc9aa;
  border-radius: 10px;
  padding: 12px;
  font-size: 14px;
  color: #28563a;
}

ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.footer {
  margin-top: 18px;
  padding: 14px 4px;
  font-size: 13px;
  color: var(--muted);
}

.footer a {
  color: var(--brand);
}

@media (max-width: 640px) {
  .site-header h1 {
    font-size: 24px;
  }

  .card {
    padding: 14px;
  }
}