:root {
  --bg: #0c0d0b;
  --bg-soft: #121411;
  --card: rgba(255, 255, 255, 0.045);
  --card-strong: rgba(255, 255, 255, 0.075);
  --line: rgba(255, 255, 255, 0.12);
  --text: #ece7dc;
  --muted: #aaa397;
  --quiet: #7d776e;
  --accent: #d4a95f;
  --accent-soft: rgba(212, 169, 95, 0.16);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.38);
  --radius: 28px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgba(212, 169, 95, 0.14), transparent 32rem),
    radial-gradient(circle at 90% 12%, rgba(117, 142, 130, 0.16), transparent 30rem),
    linear-gradient(180deg, #10110e 0%, var(--bg) 42%, #080907 100%);
  min-height: 100vh;
  line-height: 1.7;
}

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

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

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.16;
  letter-spacing: -0.04em;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 22px 0;
  backdrop-filter: blur(18px);
}

.brand {
  font-size: 15px;
  letter-spacing: 0.18em;
  color: var(--text);
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(12, 13, 11, 0.62);
}

.nav a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
  transition: color 160ms ease, background 160ms ease;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  min-height: 640px;
  display: grid;
  align-content: center;
  padding: 80px 0 96px;
}

.eyebrow {
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  margin-bottom: 18px;
}

.hero h1 {
  max-width: 920px;
  font-size: clamp(46px, 8vw, 106px);
  font-weight: 680;
}

.hero-lead {
  max-width: 760px;
  margin-top: 26px;
  font-size: clamp(17px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.035);
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #11100d;
  font-weight: 700;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: -34px;
}

.stat-card,
.card,
.process-card,
.essay-card,
.note-section {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--card-strong), var(--card));
  box-shadow: var(--shadow);
}

.stat-card {
  min-height: 150px;
  padding: 24px;
  border-radius: 24px;
}

.stat-number {
  display: block;
  color: var(--text);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1;
  letter-spacing: -0.05em;
}

.stat-label {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 110px 0 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-heading h2,
.page-hero h1 {
  font-size: clamp(34px, 5vw, 64px);
}

.bento {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.card {
  min-height: 220px;
  padding: 28px;
  border-radius: var(--radius);
}

.card.span-2 {
  grid-column: span 2;
}

.card h3,
.essay-card h3,
.process-card h2,
.timeline-item h2,
.note-section h2 {
  margin-bottom: 14px;
  font-size: 24px;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.4fr);
  gap: 60px;
  padding-bottom: 120px;
}

.two-column h2 {
  font-size: clamp(32px, 4vw, 52px);
}

.list-block {
  padding-top: 10px;
}

.quiet-list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.quiet-list li {
  position: relative;
  padding: 16px 0 16px 26px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.quiet-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 27px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.page-hero {
  padding: 90px 0 70px;
  max-width: 920px;
}

.page-hero p:not(.eyebrow) {
  max-width: 780px;
  margin-top: 22px;
  font-size: 18px;
}

.timeline {
  display: grid;
  gap: 18px;
  padding-bottom: 120px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 28px;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
}

.timeline-mark {
  width: 58px;
  height: 58px;
  border: 1px solid rgba(212, 169, 95, 0.4);
  border-radius: 18px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: var(--accent-soft);
  font-weight: 700;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.tags span,
.inline-metrics span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.035);
  font-size: 13px;
}

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 14px;
  padding-bottom: 12px;
}

.process-card {
  min-height: 260px;
  padding: 24px;
  border-radius: 24px;
}

.process-card span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
}

.essay-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-bottom: 120px;
}

.essay-card {
  padding: 30px;
  border-radius: var(--radius);
}

.notes-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 34px;
  align-items: start;
  padding-bottom: 120px;
}

.note-index {
  position: sticky;
  top: 100px;
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(12, 13, 11, 0.66);
}

.note-index a {
  padding: 10px 12px;
  border-radius: 14px;
  color: var(--muted);
  font-size: 14px;
}

.note-index a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
}

.note-content {
  display: grid;
  gap: 18px;
}

.note-section {
  padding: 34px;
  border-radius: var(--radius);
  scroll-margin-top: 110px;
}

blockquote {
  margin: 26px 0 0;
  padding: 18px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 0 18px 18px 0;
  color: var(--text);
  background: var(--accent-soft);
}

.inline-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.site-footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 36px 0 54px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  color: var(--quiet);
  font-size: 14px;
}

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

@media (max-width: 960px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .nav {
    overflow-x: auto;
    width: 100%;
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
    padding: 70px 0;
  }

  .stats-grid,
  .bento,
  .process,
  .essay-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .card.span-2 {
    grid-column: span 2;
  }

  .two-column,
  .notes-layout {
    grid-template-columns: 1fr;
  }

  .note-index {
    position: static;
    display: flex;
    overflow-x: auto;
  }
}

@media (max-width: 640px) {
  main,
  .site-header,
  .site-footer {
    width: min(100% - 28px, 1180px);
  }

  .stats-grid,
  .bento,
  .process,
  .essay-grid {
    grid-template-columns: 1fr;
  }

  .card.span-2 {
    grid-column: auto;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .site-footer {
    flex-direction: column;
  }
}