:root {
  --bg: #f5f2ea;
  --surface: #fcfaf5;
  --ink: #161412;
  --muted: #5b5750;
  --line: #d9d3c6;
  --accent: #9a5f2f;
  --accent-soft: #d8b794;
  --shadow: 0 16px 44px rgba(24, 18, 12, 0.12);
  --max-width: 1160px;
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: "Noto Serif SC", "Source Han Serif SC", serif;
  color: var(--ink);
  background:
    radial-gradient(
      circle at 80% 10%,
      rgba(154, 95, 47, 0.14),
      transparent 34%
    ),
    radial-gradient(
      circle at 10% 12%,
      rgba(216, 183, 148, 0.24),
      transparent 30%
    ),
    var(--bg);
  line-height: 1.6;
  letter-spacing: 0.01em;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(
    rgba(40, 32, 25, 0.05) 0.6px,
    transparent 0.6px
  );
  background-size: 4px 4px;
  opacity: 0.22;
  z-index: -1;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(100% - 2.4rem, var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 242, 234, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  font-family: "Bodoni Moda", "Times New Roman", serif;
  letter-spacing: 0.06em;
}

.brand-dot {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: linear-gradient(145deg, var(--accent), var(--accent-soft));
  box-shadow: 0 0 0 4px rgba(154, 95, 47, 0.14);
}

.brand-name {
  font-size: 1.08rem;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  gap: 1.2rem;
  align-items: center;
  font-size: 0.94rem;
}

.main-nav a {
  padding: 0.4rem 0.2rem;
  border-bottom: 1px solid transparent;
  color: var(--muted);
  transition:
    color 180ms ease,
    border-color 180ms ease;
}

.main-nav a[aria-current="page"],
.main-nav a:hover {
  color: var(--ink);
  border-color: var(--accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid var(--line);
  padding: 0.72rem 1.15rem;
  font-size: 0.92rem;
  cursor: pointer;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}

.btn-primary {
  color: #f8f4ee;
  border-color: var(--accent);
  background: linear-gradient(135deg, #6f4221, var(--accent));
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.54);
}

.hero {
  padding: 6rem 0 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: start;
}

.kicker {
  margin: 0;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.77rem;
}

.hero h1,
.page-title {
  margin: 0.6rem 0 0;
  font-family: "Bodoni Moda", "Times New Roman", serif;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.08;
  font-size: clamp(2.5rem, 5vw, 5rem);
}

.hero p.lead {
  max-width: 62ch;
  color: var(--muted);
  margin: 1.3rem 0 2rem;
  font-size: 1.06rem;
}

.hero-actions {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
}

.hero-note {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.hero-note h2,
.card h3,
.section-title,
.timeline h3 {
  font-family: "Bodoni Moda", "Times New Roman", serif;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero-note small {
  color: var(--muted);
}

.section {
  padding: 4.2rem 0;
}

.section-title {
  margin: 0;
  font-size: clamp(1.85rem, 3.2vw, 2.8rem);
}

.section-subtitle {
  color: var(--muted);
  margin: 0.9rem 0 0;
  max-width: 60ch;
}

.cards {
  margin-top: 2rem;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 1.2rem;
  min-height: 210px;
  position: relative;
}

.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  transition: border-color 200ms ease;
  pointer-events: none;
}

.card:hover::after {
  border-color: rgba(154, 95, 47, 0.46);
}

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

.feature-slab {
  border: 1px solid var(--line);
  background: #f9f6ef;
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  margin-top: 2rem;
}

.feature-index {
  font-family: "Bodoni Moda", "Times New Roman", serif;
  font-size: clamp(3rem, 6vw, 5rem);
  color: rgba(154, 95, 47, 0.34);
  padding: 1.5rem;
  border-right: 1px solid var(--line);
}

.feature-content {
  padding: 1.5rem;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
}

.download-box {
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1.4rem;
}

.label {
  display: inline-block;
  color: var(--accent);
  border: 1px solid rgba(154, 95, 47, 0.34);
  padding: 0.18rem 0.6rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.timeline {
  border-left: 1px solid var(--line);
  margin-top: 1rem;
  padding-left: 1.2rem;
}

.timeline-item {
  margin: 0 0 1rem;
}

.timeline-item small {
  color: var(--muted);
}

.policy {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 1.3rem;
  margin-bottom: 1rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 2rem 0 2.6rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 460ms ease,
    transform 460ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .hero-grid,
  .cards,
  .split,
  .feature-slab {
    grid-template-columns: 1fr;
  }

  .feature-index {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .main-nav {
    gap: 0.8rem;
    font-size: 0.88rem;
  }
}

@media (max-width: 640px) {
  .header-inner {
    align-items: flex-start;
    min-height: auto;
    flex-direction: column;
    gap: 0.8rem;
    padding: 0.9rem 0;
  }

  .hero {
    padding-top: 4.1rem;
  }
}