:root {
  --paper: #f3f1e9;
  --paper-strong: #fbfaf5;
  --ink: #171a17;
  --muted: #686e68;
  --quiet: #92978f;
  --line: #d7d8cf;
  --line-strong: #b9beb5;
  --accent: #0d7652;
  --accent-deep: #07563c;
  --accent-soft: #dcece4;
  --signal: #d16442;
  --signal-soft: #f2e1da;
  --blue: #245d73;
  --shadow: 0 18px 50px rgba(29, 35, 30, .08);
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, Georgia, serif;
  --shell: 1240px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  color-scheme: light;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 14% -8%, rgba(13, 118, 82, .08), transparent 31rem),
    var(--paper);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.search-open { overflow: hidden; }

::selection { background: #bfe0d1; color: var(--ink); }

a { color: inherit; }

img, svg { max-width: 100%; }

button, input { font: inherit; }

button { color: inherit; }

[hidden] { display: none !important; }

.shell {
  width: min(calc(100% - 48px), var(--shell));
  margin-inline: auto;
}

.narrow-shell {
  width: min(calc(100% - 48px), 900px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 1000;
  left: 16px;
  top: 12px;
  transform: translateY(-160%);
  padding: 9px 14px;
  background: var(--ink);
  color: #fff;
  text-decoration: none;
}

.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 3px solid rgba(13, 118, 82, .35);
  outline-offset: 3px;
}

.eyebrow {
  color: var(--accent);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(185, 190, 181, .72);
  background: rgba(243, 241, 233, .9);
  backdrop-filter: blur(18px) saturate(120%);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  color: #fff;
  background: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 800;
}

.brand-copy { display: flex; flex-direction: column; line-height: 1.05; }
.brand-copy strong { font-size: 14px; letter-spacing: .18em; }
.brand-copy small { margin-top: 5px; color: var(--quiet); font-size: 8px; letter-spacing: .14em; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.main-nav a {
  padding: 8px 12px;
  border-radius: 8px;
  color: #4d534d;
  font-size: 13px;
  font-weight: 650;
  text-decoration: none;
}

.main-nav a:hover, .main-nav a[aria-current="page"] {
  color: var(--ink);
  background: rgba(255, 255, 255, .58);
}

.search-trigger, .menu-trigger, .search-close {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
}

.search-trigger:hover, .menu-trigger:hover, .search-close:hover { background: var(--paper-strong); }
.menu-trigger { display: none; }

.search-panel {
  position: fixed;
  z-index: 90;
  inset: 69px 0 0;
  overflow: auto;
  background: rgba(23, 26, 23, .54);
  backdrop-filter: blur(8px);
}

.search-panel-inner {
  margin-top: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.search-box-wrap { display: grid; grid-template-columns: 1fr auto; gap: 12px; }

.global-search, .archive-search {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
}

.global-search {
  min-height: 56px;
  padding: 0 18px;
  font-size: 18px;
}

.search-results {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.search-result {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 5px 16px;
  padding: 14px 16px;
  border-radius: 12px;
  text-decoration: none;
}

.search-result:hover { background: var(--accent-soft); }
.search-result span { color: var(--accent); font-size: 11px; font-weight: 750; }
.search-result strong { grid-column: 1; line-height: 1.45; }
.search-result small { grid-column: 2; grid-row: 1 / span 2; align-self: center; color: var(--quiet); }
.search-empty { padding: 28px 4px 10px; color: var(--muted); }

.button, .text-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 17px;
  border: 1px solid var(--line-strong);
  border-radius: 11px;
  font-size: 13px;
  font-weight: 750;
  text-decoration: none;
  transition: transform .16s ease, background .16s ease, color .16s ease;
}

.button:hover, .text-button:hover { transform: translateY(-1px); background: #fff; }
.button.primary { border-color: var(--accent); color: #fff; background: var(--accent); }
.button.primary:hover { background: var(--accent-deep); }
.text-button { min-height: auto; padding: 0; border: 0; color: var(--accent); }

.page-hero {
  padding: 86px 0 60px;
  border-bottom: 1px solid var(--line);
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, .55fr);
  gap: 80px;
  align-items: end;
}

.page-hero h1, .home-hero h1 {
  max-width: 850px;
  margin: 18px 0 22px;
  font-family: var(--serif);
  font-size: clamp(48px, 7vw, 92px);
  font-weight: 800;
  letter-spacing: -.065em;
  line-height: 1.03;
}

.page-hero h1 { font-size: clamp(42px, 6vw, 76px); }
.page-hero .lead, .home-hero .lead {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 30px; }

.home-hero { padding: 102px 0 76px; }
.home-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, .65fr);
  gap: 80px;
  align-items: end;
}

.hero-aside {
  padding: 26px 0 6px 28px;
  border-left: 1px solid var(--line-strong);
}

.hero-aside strong {
  display: block;
  max-width: 300px;
  margin: 12px 0;
  font-family: var(--serif);
  font-size: 27px;
  line-height: 1.3;
}

.hero-aside p { margin: 0; color: var(--muted); font-size: 14px; }

.metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-block: 1px solid var(--line);
}

.metric { padding: 28px 4px; }
.metric + .metric { padding-left: 28px; border-left: 1px solid var(--line); }
.metric strong { display: block; font-family: var(--serif); font-size: 36px; line-height: 1; }
.metric span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }

.section { padding: 76px 0; }
.section.compact { padding: 54px 0; }
.section.tint { border-block: 1px solid var(--line); background: rgba(255, 255, 255, .32); }

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 30px;
}

.section-head h2 {
  margin: 8px 0 0;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: -.045em;
}

.section-head p { max-width: 540px; margin: 0; color: var(--muted); }

.system-number { color: var(--accent); font-family: ui-monospace, monospace; font-size: 12px; }

.featured-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 18px;
}

.feature-card {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  padding: 34px;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  background: var(--paper-strong);
}

.feature-card::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -110px;
  width: 290px;
  height: 290px;
  border: 1px solid rgba(13, 118, 82, .22);
  border-radius: 50%;
  box-shadow: 0 0 0 34px rgba(13, 118, 82, .045), 0 0 0 70px rgba(13, 118, 82, .03);
}

.feature-card.secondary { min-height: 201px; padding: 26px; }
.feature-stack { display: grid; gap: 18px; }
.feature-card > a { position: absolute; z-index: 3; inset: 0; }
.feature-meta { position: relative; z-index: 2; display: flex; gap: 10px; color: var(--accent); font-size: 11px; font-weight: 750; }
.feature-card h3 { position: relative; z-index: 2; max-width: 750px; margin: 56px 0 18px; font-family: var(--serif); font-size: clamp(30px, 4vw, 52px); line-height: 1.16; letter-spacing: -.045em; }
.feature-card.secondary h3 { margin: 24px 0 10px; font-size: 24px; }
.feature-card p { position: relative; z-index: 2; max-width: 660px; margin: 0; color: var(--muted); }
.feature-card.secondary p { font-size: 13px; }
.feature-card:hover h3 { color: var(--accent-deep); }

.article-list { border-top: 1px solid var(--line-strong); }

.article-row {
  position: relative;
  display: grid;
  grid-template-columns: 72px 150px minmax(0, 1fr) 220px 64px;
  gap: 18px;
  align-items: start;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
}

.article-row > a { position: absolute; inset: 0; z-index: 2; }
.article-row:hover { background: rgba(255, 255, 255, .4); }
.row-number { color: var(--quiet); font-family: ui-monospace, monospace; font-size: 11px; }
.row-category { color: var(--accent); font-size: 11px; font-weight: 750; }
.row-title { font-family: var(--serif); font-size: 21px; font-weight: 750; line-height: 1.38; }
.row-summary { margin-top: 7px; color: var(--muted); font-size: 13px; line-height: 1.6; }
.row-tier, .row-time { color: var(--quiet); font-size: 11px; }

.tier-pill, .evidence-grade {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  min-height: 26px;
  padding: 0 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: #596059;
  background: rgba(255, 255, 255, .35);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: .05em;
}

.tier-pill.flagship { border-color: var(--ink); color: #fff; background: var(--ink); }
.tier-pill.core { border-color: #aacbbd; color: var(--accent-deep); background: var(--accent-soft); }

.archive-tools {
  position: sticky;
  z-index: 20;
  top: 68px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  background: rgba(243, 241, 233, .94);
  backdrop-filter: blur(14px);
}

.archive-tools-inner { display: grid; grid-template-columns: minmax(220px, 360px) 1fr; gap: 18px; }
.archive-search { min-height: 46px; padding: 0 14px; }
.filter-row {
  display: flex;
  min-width: 0;
  overflow-x: auto;
  gap: 7px;
  padding-bottom: 4px;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
}
.filter-button {
  flex: 0 0 auto;
  min-height: 42px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font-size: 11px;
  cursor: pointer;
}
.filter-button:hover, .filter-button.active { border-color: var(--ink); color: #fff; background: var(--ink); }
.archive-status { margin: 0 0 20px; color: var(--muted); font-size: 13px; }

.topics-system-list { display: grid; gap: 20px; }
.topics-system {
  display: grid;
  grid-template-columns: 80px 280px 1fr;
  gap: 30px;
  padding: 32px 0;
  border-top: 1px solid var(--line-strong);
}
.topics-system:last-child { border-bottom: 1px solid var(--line-strong); }
.topics-system h2 { margin: 0 0 10px; font-family: var(--serif); font-size: 29px; line-height: 1.25; }
.topics-system p { margin: 0; color: var(--muted); font-size: 13px; }
.topic-link-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.topic-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 48px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: rgba(255, 255, 255, .25);
  text-decoration: none;
}
.topic-link:hover { border-color: var(--accent); color: var(--accent-deep); background: var(--paper-strong); }
.topic-link small { color: var(--quiet); }

.topic-hero { padding: 82px 0 56px; border-bottom: 1px solid var(--line); }
.topic-hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 70px; align-items: end; }
.topic-hero h1 { margin: 14px 0 20px; font-family: var(--serif); font-size: clamp(44px, 6vw, 72px); line-height: 1.05; letter-spacing: -.055em; }
.topic-hero .lead { max-width: 750px; margin: 0; color: var(--muted); font-size: 18px; }
.topic-lens { padding: 22px; border: 1px solid var(--line-strong); border-radius: 16px; background: rgba(255, 255, 255, .28); }
.topic-lens strong { display: block; margin-bottom: 8px; color: var(--accent); font-size: 11px; letter-spacing: .08em; }
.topic-lens p { margin: 0; color: #4d544d; font-size: 13px; }

.topic-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.topic-feature-card { position: relative; min-height: 300px; padding: 28px; border: 1px solid var(--line-strong); border-radius: 18px; background: var(--paper-strong); }
.topic-feature-card > a { position: absolute; inset: 0; z-index: 2; }
.topic-feature-card h2 { margin: 50px 0 13px; font-family: var(--serif); font-size: 30px; line-height: 1.25; }
.topic-feature-card p { color: var(--muted); }

.paths-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.path-card { overflow: hidden; border: 1px solid var(--line-strong); border-radius: 18px; background: rgba(255, 255, 255, .24); }
.path-card-head { padding: 26px 26px 22px; }
.path-card-head h2 { margin: 26px 0 10px; font-family: var(--serif); font-size: 28px; line-height: 1.25; }
.path-card-head p { margin: 0; color: var(--muted); font-size: 13px; }
.path-steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); counter-reset: path; }
.path-steps li { counter-increment: path; }
.path-steps a {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}
.path-steps li:last-child a { border-bottom: 0; }
.path-steps a::before { content: counter(path, decimal-leading-zero); color: var(--quiet); font-family: ui-monospace, monospace; font-size: 10px; }
.path-steps a:hover { background: var(--paper-strong); color: var(--accent-deep); }
.path-steps span { line-height: 1.4; }
.path-steps small { color: var(--quiet); font-size: 10px; }

.article-hero { padding: 70px 0 48px; border-bottom: 1px solid var(--line); }
.article-kicker { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; }
.article-kicker a { color: var(--accent); font-size: 11px; font-weight: 750; text-decoration: none; }
.article-kicker .dot { color: var(--line-strong); }
.article-hero h1 {
  max-width: 1050px;
  margin: 22px 0 22px;
  font-family: var(--serif);
  font-size: clamp(38px, 5.6vw, 72px);
  font-weight: 800;
  letter-spacing: -.055em;
  line-height: 1.11;
}
.article-subtitle { max-width: 850px; margin: 0; color: var(--muted); font-size: 19px; line-height: 1.75; }
.article-meta { display: flex; flex-wrap: wrap; gap: 9px 20px; margin-top: 26px; color: var(--quiet); font-size: 11px; }

.article-reading-grid {
  display: grid;
  grid-template-columns: 210px minmax(0, 720px) 180px;
  gap: 44px;
  justify-content: center;
  align-items: start;
  padding-top: 52px;
}

.article-context, .article-toc { position: sticky; top: 96px; }
.context-label, .toc-label { margin-bottom: 12px; color: var(--quiet); font-size: 10px; font-weight: 800; letter-spacing: .12em; }
.article-context blockquote { margin: 0; padding: 0; border: 0; font-family: var(--serif); font-size: 16px; font-weight: 700; line-height: 1.6; }
.article-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 18px; }
.article-tags span { padding: 4px 8px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 10px; }
.context-legend { margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }

.article-toc nav { display: grid; gap: 2px; }
.article-toc a { padding: 6px 0 6px 12px; border-left: 1px solid var(--line); color: var(--muted); font-size: 11px; line-height: 1.45; text-decoration: none; }
.article-toc a:hover, .article-toc a.active { border-color: var(--accent); color: var(--accent-deep); }

.prose { min-width: 0; font-family: var(--serif); font-size: 18px; line-height: 1.95; }
.prose > p:first-of-type { font-size: 20px; color: #353a35; }
.prose p { margin: 1.15em 0; }
.prose h2 { scroll-margin-top: 98px; margin: 2.7em 0 .8em; font-size: 31px; line-height: 1.35; letter-spacing: -.03em; }
.prose h3 { scroll-margin-top: 98px; margin: 2em 0 .65em; font-size: 22px; line-height: 1.4; }
.prose a { color: var(--accent-deep); text-decoration-thickness: 1px; text-underline-offset: 3px; }
.prose blockquote { margin: 2em 0; padding: 18px 0 18px 24px; border-left: 3px solid var(--accent); color: #3e453e; font-size: 20px; }
.prose ul, .prose ol { padding-left: 1.4em; }
.prose li { margin: .5em 0; }
.prose strong { font-weight: 800; }
.prose img, .prose svg { display: block; height: auto; margin: 28px auto; }

.article-deepening { margin: 2.6em 0; padding: 0 0 0 24px; border-left: 1px solid var(--line-strong); }
.article-deepening::before { content: "进一步推演"; color: var(--accent); font-family: var(--sans); font-size: 10px; font-weight: 800; letter-spacing: .12em; }

.merged-chapter { margin-top: 0; }

.analysis-axes {
  margin: 52px 0 28px;
  padding: 28px;
  border-radius: 18px;
  color: #f4f7f3;
  background: var(--ink);
  font-family: var(--sans);
}
.analysis-axes .eyebrow { color: #81c5a8; }
.analysis-axes h2 { margin: 8px 0 22px; color: #fff; font-family: var(--serif); font-size: 27px; }
.axes-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.axis { padding-top: 14px; border-top: 1px solid #3c433d; }
.axis b { display: block; color: #aeb7af; font-size: 10px; letter-spacing: .09em; }
.axis p { margin: 7px 0 0; color: #e1e5e0; font-family: var(--serif); font-size: 14px; line-height: 1.7; }

.comparison-chart, .formula-card, .concept-grid, .mechanism-map { margin: 30px 0; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .3); font-family: var(--sans); font-size: 13px; }
.comparison-chart { display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center; text-align: center; }
.comparison-chart .versus { color: var(--signal); font-weight: 800; }
.formula-card { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.concept-grid, .mechanism-map { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

.model-box, .risk-note, .data-note, .jurisdiction-note, .precision-note {
  margin: 30px 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, .36);
  font-family: var(--sans);
  font-size: 13px;
}
.model-title { margin-bottom: 12px; color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.model-flow { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; }
.model-flow > * { padding: 12px; border: 1px solid var(--line); border-radius: 10px; text-align: center; }
.model-flow b { padding: 0; border: 0; color: var(--signal); }
.risk-note { border-color: #d9c3b8; background: var(--signal-soft); }
.risk-note strong, .data-note strong, .jurisdiction-note strong, .precision-note strong { color: var(--signal); }
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 28px 0; font-family: var(--sans); }
.stat-cell { padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: rgba(255, 255, 255, .36); }
.stat-cell strong { display: block; color: var(--accent-deep); font-family: var(--serif); font-size: 26px; line-height: 1.15; }
.stat-cell span { display: block; margin-top: 8px; color: var(--muted); font-size: 11px; line-height: 1.5; }
.stat-source { grid-column: 1 / -1; margin: 0; color: var(--quiet); font-size: 10px; }
.insight-figure { margin: 32px 0; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper-strong); }
.insight-figure img { margin: 0 auto 12px; }
.insight-figure figcaption { color: var(--muted); font-family: var(--sans); font-size: 11px; line-height: 1.6; }
.evidence-details { margin: 54px 0 0; border-top: 1px solid var(--line-strong); font-family: var(--sans); }
.evidence-details > summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 0; cursor: pointer; list-style: none; }
.evidence-details > summary::-webkit-details-marker { display: none; }
.evidence-details > summary strong { font-size: 13px; }
.evidence-details > summary span { color: var(--muted); font-size: 11px; }
.evidence-details > summary::after { content: "+"; display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--line); border-radius: 50%; }
.evidence-details[open] > summary::after { content: "−"; }
.evidence-content { padding: 0 0 26px; }
.evidence-content .evidence-heading, .evidence-content .eyebrow { display: none; }
.evidence-content .evidence-section { margin: 0; }
.evidence-content h2 { margin: 1.8em 0 .6em; font-family: var(--serif); font-size: 24px; }
.evidence-content h3 { margin: 1.6em 0 .5em; font-family: var(--serif); font-size: 18px; }
.evidence-content p, .evidence-content li { color: #555c56; font-size: 13px; line-height: 1.72; }
.source-list { padding-left: 20px; }
.source-list li { margin: 14px 0; }
.source-list a { display: block; color: var(--accent-deep); font-weight: 750; overflow-wrap: anywhere; }
.source-list span { display: block; color: var(--quiet); font-size: 10px; }
.source-list p { margin: 4px 0; }
.grade-explainer, .sources-note, .source-register-link { padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: rgba(255, 255, 255, .35); }

.article-end { padding: 70px 0 86px; }
.related-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.related-card { position: relative; min-height: 260px; padding: 22px; border: 1px solid var(--line-strong); border-radius: 16px; background: rgba(255, 255, 255, .25); }
.related-card > a { position: absolute; inset: 0; z-index: 2; }
.related-card:hover { background: var(--paper-strong); }
.related-card span { color: var(--accent); font-size: 10px; font-weight: 800; }
.related-card h3 { margin: 36px 0 10px; font-family: var(--serif); font-size: 21px; line-height: 1.4; }
.related-card p { color: var(--muted); font-size: 12px; }
.article-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 28px; }
.pager-link { display: grid; min-height: 92px; padding: 16px 18px; border-top: 1px solid var(--line-strong); text-decoration: none; }
.pager-link.next { text-align: right; }
.pager-link small { color: var(--quiet); }
.pager-link strong { margin-top: 6px; font-family: var(--serif); line-height: 1.4; }
.pager-link:hover strong { color: var(--accent-deep); }

.source-page section + section, .sources-page section + section { margin-top: 54px; }
.evidence-policy > h2, .source-register > .section-head h2 { font-family: var(--serif); font-size: 32px; }
.policy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
.policy-grid > div { padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .3); }
.policy-grid b { display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%; color: #fff; background: var(--accent); }
.policy-grid p, .evidence-policy > p { color: var(--muted); font-size: 13px; }
.source-grid, .sources-page .source-register-grid, .source-register-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.source-card { padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .25); }
.source-card h2, .source-card h3 { margin: 0 0 8px; font-family: var(--serif); font-size: 20px; }
.source-card p { margin: 6px 0; color: var(--muted); font-size: 12px; }
.source-card a { color: var(--accent-deep); overflow-wrap: anywhere; }
.source-kind { display: inline-block; margin-bottom: 12px; color: var(--accent); font-size: 10px; font-weight: 800; letter-spacing: .08em; }
.grade-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.grade-card { padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .25); }
.grade-card h3 { margin: 0 0 8px; font-family: var(--serif); }
.grade-card p { margin: 0; color: var(--muted); font-size: 13px; }

.about-grid { display: grid; grid-template-columns: 280px 1fr; gap: 80px; }
.about-side { position: sticky; top: 100px; align-self: start; }
.about-side p { color: var(--muted); font-size: 13px; }
.about-content section { padding: 0 0 36px; margin-bottom: 36px; border-bottom: 1px solid var(--line); }
.about-content h2 { margin: 0 0 12px; font-family: var(--serif); font-size: 30px; }
.about-content p { color: #4f554f; }

.not-found { min-height: calc(100vh - 250px); display: grid; place-items: center; text-align: center; }
.not-found strong { display: block; color: var(--accent); font-family: ui-monospace, monospace; font-size: 13px; }
.not-found h1 { margin: 18px 0 12px; font-family: var(--serif); font-size: clamp(42px, 8vw, 84px); line-height: 1; }
.not-found p { max-width: 560px; margin: 0 auto 28px; color: var(--muted); }

.site-footer { padding: 54px 0 28px; border-top: 1px solid var(--line-strong); background: #e8e7df; }
.footer-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; }
.footer-brand { display: flex; align-items: center; gap: 12px; font-family: var(--serif); font-size: 25px; font-weight: 800; }
.footer-copy { max-width: 480px; margin-top: 12px; color: var(--muted); font-size: 13px; }
.footer-nav { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 22px; align-content: start; }
.footer-nav a { padding: 5px 0; color: #4e544e; font-size: 12px; text-decoration: none; }
.footer-nav a:hover { color: var(--accent-deep); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 38px; padding-top: 18px; border-top: 1px solid var(--line-strong); color: var(--quiet); font-size: 10px; }

@media (max-width: 1100px) {
  .article-reading-grid { grid-template-columns: 190px minmax(0, 720px); }
  .article-toc { display: none; }
  .article-row { grid-template-columns: 56px 120px minmax(0, 1fr) 64px; }
  .row-tier { display: none; }
}

@media (max-width: 900px) {
  .shell, .narrow-shell { width: min(calc(100% - 36px), var(--shell)); }
  .main-nav {
    position: fixed;
    top: 69px;
    left: 0;
    right: 0;
    display: none;
    margin: 0;
    padding: 14px 18px 18px;
    border-bottom: 1px solid var(--line);
    background: var(--paper-strong);
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: grid; }
  .main-nav a { padding: 12px 10px; }
  .menu-trigger { display: grid; margin-left: auto; }
  .home-hero-grid, .page-hero-grid, .topic-hero-grid { grid-template-columns: 1fr; gap: 42px; }
  .home-hero, .page-hero { padding-top: 70px; }
  .hero-aside { max-width: 520px; }
  .featured-grid { grid-template-columns: 1fr; }
  .feature-stack { grid-template-columns: 1fr 1fr; }
  .article-reading-grid { grid-template-columns: 1fr; width: min(calc(100% - 36px), 720px); margin-inline: auto; }
  .article-context { position: static; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255, 255, 255, .25); }
  .context-legend { display: none; }
  .topics-system { grid-template-columns: 54px 1fr; }
  .topic-link-list { grid-column: 2; }
  .paths-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 38px; }
  .about-side { position: static; }
}

@media (max-width: 680px) {
  .shell, .narrow-shell { width: min(calc(100% - 28px), var(--shell)); }
  .header-inner { min-height: 62px; gap: 8px; }
  .brand-copy small { display: none; }
  .search-panel { inset-block-start: 63px; }
  .search-results { grid-template-columns: 1fr; }
  .home-hero { padding: 58px 0 48px; }
  .home-hero h1, .page-hero h1 { font-size: 46px; }
  .home-hero-grid { gap: 34px; }
  .hero-aside { padding-left: 20px; }
  .hero-aside strong { font-size: 23px; }
  .metrics { grid-template-columns: 1fr; }
  .metric + .metric { padding-left: 4px; border-left: 0; border-top: 1px solid var(--line); }
  .metric { display: flex; align-items: baseline; gap: 14px; padding: 18px 4px; }
  .metric strong { font-size: 30px; }
  .metric span { margin: 0; }
  .section { padding: 56px 0; }
  .section-head { display: block; }
  .section-head p, .section-head .text-button { margin-top: 14px; }
  .feature-stack { grid-template-columns: 1fr; }
  .feature-card { min-height: 330px; padding: 24px; }
  .feature-card.secondary { min-height: 230px; }
  .feature-card h3 { margin-top: 42px; font-size: 32px; }
  .article-row { grid-template-columns: 42px 1fr 46px; gap: 10px; padding: 18px 2px; }
  .row-category { grid-column: 2; grid-row: 1; }
  .row-main { grid-column: 2; grid-row: 2; }
  .row-time { grid-column: 3; grid-row: 1; text-align: right; }
  .row-number { grid-row: 1 / span 2; }
  .row-title { font-size: 18px; }
  .archive-tools { top: 62px; }
  .archive-tools-inner { grid-template-columns: 1fr; gap: 10px; }
  .topics-system { grid-template-columns: 42px 1fr; gap: 16px; }
  .topic-link-list { grid-template-columns: 1fr; }
  .topic-feature { grid-template-columns: 1fr; }
  .article-hero { padding: 48px 0 36px; }
  .article-hero h1 { margin-top: 18px; font-size: 40px; }
  .article-subtitle { font-size: 17px; }
  .article-reading-grid { padding-top: 28px; }
  .prose { font-size: 17px; line-height: 1.9; }
  .prose > p:first-of-type { font-size: 18px; }
  .prose h2 { font-size: 27px; }
  .analysis-axes { padding: 20px; }
  .axes-grid { grid-template-columns: 1fr; gap: 14px; }
  .comparison-chart, .concept-grid, .mechanism-map { grid-template-columns: 1fr; }
  .model-flow, .stat-grid { grid-template-columns: 1fr; }
  .model-flow b { transform: rotate(90deg); }
  .related-grid { grid-template-columns: 1fr; }
  .related-card { min-height: 220px; }
  .article-pager { grid-template-columns: 1fr; }
  .pager-link.next { text-align: left; }
  .source-grid, .sources-page .source-register-grid, .source-register-grid, .grade-grid, .policy-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}