:root {
  --ink: #1c1914;
  --ink-soft: #5c564c;
  --paper: #f3eee6;
  --paper-2: #e7e0d4;
  --dye: #1f3b34;
  --dye-2: #2f5a4e;
  --thread: #a33b2b;
  --line: rgba(28, 25, 20, 0.12);
  --max: 1120px;
  --serif: "Songti SC", "Noto Serif SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(1200px 480px at 100% -10%, rgba(163, 59, 43, 0.08), transparent 60%),
    var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 28px;
  background: rgba(243, 238, 230, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}
.mark {
  width: 42px;
  height: 42px;
  flex: none;
  display: grid;
  place-items: center;
  background: var(--dye);
  color: #f6f1e8;
  font-family: var(--serif);
  font-size: 22px;
  letter-spacing: 0;
}
.brand b { display: block; font-size: 16px; letter-spacing: 0.12em; }
.brand small { display: block; color: var(--ink-soft); font-size: 12px; letter-spacing: 0.04em; }
.nav nav { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.nav nav a { color: var(--ink-soft); }
.nav nav a[aria-current="page"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--thread); }

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: end;
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 28px 36px;
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--thread);
  letter-spacing: 0.28em;
  font-size: 13px;
}
h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(36px, 5vw, 60px);
  line-height: 1.2;
  letter-spacing: 0.04em;
}
.lead {
  max-width: 36em;
  margin: 20px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}
.swatch {
  min-height: 320px;
  background:
    repeating-linear-gradient(90deg, rgba(255, 248, 240, 0.28) 0 1px, transparent 1px 18px),
    repeating-linear-gradient(0deg, rgba(31, 59, 52, 0.18) 0 1px, transparent 1px 18px),
    linear-gradient(155deg, #1f3b34 0%, #3d6b5c 42%, #c4a574 78%, #a33b2b 100%);
  box-shadow: 16px 16px 0 rgba(31, 59, 52, 0.08);
}
.swatch span {
  display: block;
  padding: 22px;
  color: #f6f1e8;
  font-family: var(--serif);
  letter-spacing: 0.22em;
  font-size: 14px;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 28px 8px;
}
.section h2 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.section .note { margin: 0 0 22px; color: var(--ink-soft); }
.points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-bottom: 12px;
}
.point {
  padding: 22px 20px 20px;
  background: rgba(255, 252, 247, 0.72);
  border: 1px solid var(--line);
}
.point strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.point p { margin: 0; color: var(--ink-soft); font-size: 15px; }

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
}
.card { grid-column: span 3; }
.card:nth-child(n + 5) { grid-column: span 4; }
.card {
  padding: 22px 18px 18px;
  background: rgba(255, 252, 247, 0.72);
  border: 1px solid var(--line);
  border-top: 3px solid var(--dye);
}
.card:nth-child(3n) { border-top-color: var(--thread); }
.card em {
  display: block;
  font-style: normal;
  font-family: var(--serif);
  color: var(--thread);
  letter-spacing: 0.12em;
  font-size: 13px;
}
.card strong {
  display: block;
  margin-top: 10px;
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.card p { margin: 8px 0 0; color: var(--ink-soft); font-size: 14px; }

.strip {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr auto;
  gap: 28px;
  align-items: center;
  max-width: var(--max);
  margin: 48px auto 0;
  padding: 28px;
  background: var(--dye);
  color: #f6f1e8;
}
.strip p { margin: 6px 0 0; }
.strip .label {
  margin: 0;
  letter-spacing: 0.18em;
  font-size: 12px;
  color: #d7c4a4;
}
.strip a.more {
  justify-self: end;
  padding: 10px 16px;
  border: 1px solid rgba(246, 241, 232, 0.5);
  letter-spacing: 0.08em;
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 72px 28px 24px;
}
.page h1 { font-size: clamp(32px, 4vw, 48px); }
.facts { display: grid; gap: 14px; margin-top: 32px; }
.fact {
  padding: 22px 24px;
  background: rgba(255, 252, 247, 0.8);
  border: 1px solid var(--line);
}
.fact .label {
  margin: 0;
  color: var(--thread);
  letter-spacing: 0.16em;
  font-size: 12px;
}
.fact p { margin: 8px 0 0; font-size: 20px; font-family: var(--serif); }

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px;
  color: var(--ink-soft);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
}

@media (max-width: 860px) {
  .nav { align-items: flex-start; flex-direction: column; gap: 12px; padding: 14px 16px; }
  .nav nav { flex-wrap: wrap; gap: 14px 18px; }
  .hero, .section, .strip, .page, footer { padding-left: 16px; padding-right: 16px; }
  .hero { grid-template-columns: 1fr; gap: 24px; padding-top: 36px; }
  .swatch { min-height: 160px; }
  .points { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr 1fr; }
  .card, .card:nth-child(n + 5) { grid-column: auto; }
  .card:last-child { grid-column: 1 / -1; }
  .strip { grid-template-columns: 1fr; margin-top: 28px; }
  .strip a.more { justify-self: start; }
  footer { flex-direction: column; }
}
@media (max-width: 520px) {
  .grid { grid-template-columns: 1fr; }
  .card:last-child { grid-column: auto; }
  h1 { letter-spacing: 0; }
}