:root {
  --bg: #f6f3ee;
  --bg-accent: #efe6d8;
  --surface: #fffdf9;
  --ink: #2a241c;
  --muted: #6b6258;
  --line: #e4d8c8;
  --maple: #c0452c;
  --maple-deep: #9c3320;
  --leaf: #3f6b45;
  --shadow: 0 18px 40px rgba(80, 52, 28, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(192, 69, 44, 0.08), transparent 28rem),
    radial-gradient(circle at top right, rgba(63, 107, 69, 0.08), transparent 24rem),
    var(--bg);
  line-height: 1.7;
}

.page {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: 72rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 0;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.75rem 0 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
}

.brand img {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
}

.brand strong {
  font-size: 1.25rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  gap: 1rem;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
}

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

.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 1.5rem;
  align-items: center;
  padding: 2rem 0 2.5rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.2;
}

.hero p {
  margin: 0;
  max-width: 38rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

.hero-card dt {
  color: var(--muted);
  font-size: 0.875rem;
}

.hero-card dd {
  margin: 0 0 1rem;
  font-weight: 600;
}

.hero-card dd:last-child {
  margin-bottom: 0;
}

.section {
  margin: 0.5rem 0 2rem;
}

.section h2 {
  margin: 0 0 1rem;
  font-size: 1.5rem;
}

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.15rem 1.2rem;
  min-height: 10rem;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.about {
  background: linear-gradient(180deg, var(--surface), var(--bg-accent));
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  padding: 1.5rem 1.6rem;
}

.about p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}

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

.footer {
  margin-top: auto;
  padding: 1.5rem 0 1.25rem;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer a {
  color: var(--muted);
  text-decoration: none;
}

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

@media (max-width: 900px) {
  .hero,
  .cards {
    grid-template-columns: 1fr;
  }

  .nav {
    display: none;
  }
}