:root {
  --bg: #f6f1e8;
  --bg-alt: #efe6d8;
  --ink: #1f2a24;
  --muted: #4d5c54;
  --green: #1f4d3a;
  --green-soft: #2f6b52;
  --ochre: #a65b2b;
  --line: rgba(31, 77, 58, 0.15);
  --max: 880px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  line-height: 1.75;
}

a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--ochre);
}

.wrap {
  width: min(100% - 2rem, var(--max));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 241, 232, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.9rem;
}

.brand {
  color: var(--green);
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  gap: 1rem;
  flex-shrink: 0;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  padding-bottom: 0.1rem;
}

.nav a:hover {
  color: var(--green);
  border-bottom-color: var(--ochre);
}

.hero {
  padding: 4.5rem 0 3.5rem;
  background:
    linear-gradient(180deg, rgba(47, 107, 82, 0.08), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--green);
  line-height: 1.35;
}

.tagline {
  margin: 0;
  color: var(--ochre);
  font-size: 1.15rem;
  letter-spacing: 0.12em;
}

.section {
  padding: 3rem 0;
}

.section-alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--line);
}

.section h2 {
  margin: 0 0 1.25rem;
  color: var(--green);
  font-size: 1.35rem;
}

.section p {
  margin: 0 0 1rem;
  color: var(--muted);
}

.section p:last-child {
  margin-bottom: 0;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.contact-list li {
  display: grid;
  gap: 0.25rem;
}

.contact-list .label {
  color: var(--green-soft);
  font-size: 0.9rem;
  font-weight: 600;
}

.site-footer {
  padding: 2rem 0 2.5rem;
  background: var(--green);
  color: #f4f7f5;
  text-align: center;
}

.site-footer a {
  color: #f4f7f5;
}

.site-footer a:hover {
  color: #f0d2b8;
}

.footer-name {
  margin: 0 0 0.75rem;
  font-weight: 600;
}

.footer-links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 0.75rem;
  font-size: 0.95rem;
}

.sep {
  opacity: 0.55;
}

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero {
    padding: 3rem 0 2.5rem;
  }

  .brand {
    font-size: 0.95rem;
  }
}