/* Hallmark · genre: atmospheric · macrostructure: Long Document · theme: Aurora · tone: technical · anchor hue: 248 · enrichment: Tier-B semantic network SVG · nav: N9 · footer: Ft5 · contrast: pass (40–41) · slop: pass (42–49) · mobile: pass (34, 49–57) */
/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V4 */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

html {
  color-scheme: light;
  background: var(--color-paper);
}

html[data-theme="dark"] {
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: clip;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: var(--rule-hair);
  text-underline-offset: var(--space-3xs);
}

a:hover {
  text-decoration-thickness: var(--rule-focus);
}

a:active {
  color: var(--color-ink);
}

a[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
  pointer-events: none;
}

:focus-visible {
  outline: var(--rule-focus) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

button,
a {
  -webkit-tap-highlight-color: var(--color-transparent);
}

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-modal);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-180%);
}

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

.reading-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  z-index: var(--z-modal);
  width: 100%;
  height: var(--space-3xs);
  transform: scaleX(0);
  transform-origin: left center;
  background: var(--color-accent);
}

.site-nav {
  position: relative;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  width: min(100%, 86rem);
  margin-inline: auto;
  padding: var(--space-md) var(--page-gutter);
}

.wordmark {
  color: var(--color-ink);
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: -0.015em;
  text-decoration: none;
  white-space: nowrap;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.control {
  display: inline-flex;
  min-width: 2.75rem;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  padding-inline: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-sm);
  background: var(--color-paper);
  color: var(--color-ink);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.control:hover {
  background: var(--color-paper-2);
}

.control:active {
  background: var(--color-paper-3);
}

.control[disabled],
.control[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

.control[data-state="loading"]::after {
  content: " · 处理中";
}

.control[data-state="error"] {
  border-color: var(--color-error);
}

.control[data-state="success"]::after {
  content: " ✓";
  color: var(--color-success);
}

.menu-scrim {
  position: fixed;
  inset: 0;
  z-index: var(--z-dropdown);
  border: 0;
  background: var(--color-overlay);
  cursor: pointer;
}

.menu-panel {
  position: fixed;
  inset-block-start: var(--space-3xl);
  inset-inline-end: var(--page-gutter);
  z-index: var(--z-sticky);
  width: min(calc(100% - (2 * var(--page-gutter))), 24rem);
  max-height: calc(100dvh - var(--space-4xl));
  overflow-y: auto;
  padding: var(--space-lg);
  border: var(--rule-hair) solid var(--color-rule-strong);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  box-shadow: var(--shadow-whisper);
}

.menu-panel[hidden],
.menu-scrim[hidden] {
  display: none;
}

.menu-panel h2 {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  line-height: 1.2;
}

.menu-list {
  display: grid;
  gap: var(--space-2xs);
  margin: 0;
  padding: 0;
  list-style: none;
}

.menu-list a {
  display: block;
  min-height: 2.75rem;
  padding: var(--space-sm) var(--space-md);
  border-inline-start: var(--rule-focus) solid var(--color-transparent);
  color: var(--color-ink-2);
  font-family: var(--font-display);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.menu-list a:hover,
.menu-list a[aria-current="page"] {
  border-inline-start-color: var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-ink);
}

.menu-meta {
  margin: var(--space-lg) 0 0;
  padding-block-start: var(--space-md);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.shell {
  width: min(100%, 86rem);
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
  margin-block: var(--space-md) var(--space-xl);
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: var(--text-sm);
}

.breadcrumbs a {
  color: var(--color-muted);
  white-space: nowrap;
}

.page-header {
  display: grid;
  gap: var(--space-lg);
  max-width: 72rem;
  margin-block: var(--space-xl) var(--space-2xl);
}

.page-header h1,
.page-header p {
  margin: 0;
}

.page-header h1 {
  max-width: 12ch;
  min-width: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.045em;
  line-height: 1.05;
  overflow-wrap: anywhere;
}

.page-header--chapter h1,
.page-header--reference h1 {
  max-width: 16ch;
  font-size: var(--text-display-s);
}

.lede {
  max-width: 46ch;
  color: var(--color-ink-2);
  font-family: var(--font-display);
  font-size: var(--text-md);
  line-height: 1.55;
}

.graph-figure {
  width: min(100%, 52rem);
  margin: 0 0 var(--space-3xl) clamp(0rem, 7vw, 7rem);
}

.graph-stage {
  display: block;
  width: 100%;
  height: auto;
  border-block: var(--rule-hair) solid var(--color-rule-strong);
  background: var(--color-paper-2);
}

.graph-edge {
  stroke: var(--color-rule-strong);
  stroke-width: 2;
}

.graph-edge--accent {
  stroke: var(--color-accent);
  stroke-width: 3;
}

.graph-node {
  stroke: var(--color-paper);
  stroke-width: 5;
}

.graph-node--a { fill: var(--color-node-a); }
.graph-node--b { fill: var(--color-node-b); }
.graph-node--c { fill: var(--color-node-c); }
.graph-node--plain { fill: var(--color-paper); stroke: var(--color-rule-strong); }

.graph-label {
  fill: var(--color-ink);
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.graph-rel {
  fill: var(--color-muted);
  font-family: var(--font-body);
  font-size: 14px;
}

figcaption {
  margin-block-start: var(--space-sm);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.prose {
  width: min(100%, var(--measure));
  margin-inline-start: clamp(0rem, 7vw, 7rem);
  padding-block-end: var(--space-2xl);
}

.prose section {
  margin-block-start: var(--space-3xl);
}

.prose section:first-of-type {
  margin-block-start: 0;
}

.prose h2,
.prose h3 {
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  overflow-wrap: anywhere;
}

.prose h2 {
  margin-block-end: var(--space-lg);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.prose h3 {
  margin-block: var(--space-xl) var(--space-sm);
  font-size: var(--text-lg);
  font-weight: 800;
  line-height: 1.3;
}

.prose p {
  margin: 0 0 var(--space-lg);
  font-variant-numeric: oldstyle-nums;
}

.prose strong {
  font-family: var(--font-display);
  font-weight: 800;
}

.prose dfn {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: var(--rule-focus);
  text-underline-offset: var(--space-3xs);
}

.note {
  margin-block: var(--space-xl);
  padding: var(--space-lg);
  border-block: var(--rule-hair) solid var(--color-rule-strong);
  background: var(--color-paper-2);
}

.note p:last-child {
  margin-block-end: 0;
}

.triple {
  display: grid;
  gap: var(--space-xs);
  margin-block: var(--space-xl);
  padding: var(--space-lg);
  border: var(--rule-hair) solid var(--color-rule-strong);
  background: var(--color-paper);
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.triple span {
  color: var(--color-muted);
}

.path-list,
.check-list,
.source-list {
  margin: var(--space-xl) 0;
  padding: 0;
  list-style: none;
}

.path-list {
  counter-reset: path;
}

.path-list li {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-md);
  padding-block: var(--space-lg);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  counter-increment: path;
}

.path-list li::before {
  content: counter(path, decimal-leading-zero);
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

.path-list li:last-child {
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.path-list strong,
.check-list strong {
  display: block;
  margin-block-end: var(--space-xs);
}

.check-list li {
  padding: var(--space-lg) 0 var(--space-lg) var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.check-list li::marker {
  color: var(--color-accent);
}

.source-list li {
  padding-block: var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.source-list h2 {
  margin-block-end: var(--space-sm);
  font-size: var(--text-lg);
}

.source-list p {
  margin-block-end: var(--space-sm);
}

.source-list a {
  font-family: var(--font-display);
  font-weight: 800;
  overflow-wrap: anywhere;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  justify-content: space-between;
  width: min(100%, var(--measure));
  margin-inline-start: clamp(0rem, 7vw, 7rem);
  padding-block: var(--space-xl) var(--space-3xl);
  border-block-start: var(--rule-hair) solid var(--color-rule-strong);
}

.page-nav a {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 800;
  white-space: nowrap;
}

.foot-stmt {
  display: grid;
  gap: var(--space-xl);
  width: min(100%, 86rem);
  margin-inline: auto;
  padding: var(--space-3xl) var(--page-gutter) var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule-strong);
}

.foot-stmt__line {
  max-width: 28ch;
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: normal;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.foot-stmt__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  justify-content: space-between;
  color: var(--color-muted);
  font-family: var(--font-display);
  font-size: var(--text-sm);
}

.foot-stmt__meta a {
  color: var(--color-muted);
  white-space: nowrap;
}

@media (min-width: 40rem) {
  .page-header {
    grid-template-columns: minmax(0, 1.2fr) minmax(16rem, 0.8fr);
    align-items: end;
  }

  .page-header--reference {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 60rem) {
  .site-nav {
    padding-block: var(--space-lg);
  }

  .page-header {
    margin-block-start: var(--space-2xl);
  }
}

@media (max-width: 39.999rem) {
  .page-header h1,
  .page-header--chapter h1,
  .page-header--reference h1 {
    font-size: var(--text-3xl);
  }

  .graph-figure,
  .prose,
  .page-nav {
    margin-inline-start: 0;
  }

  .path-list li {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-nav {
    display: grid;
  }

  .foot-stmt__meta {
    display: grid;
  }
}

@media (hover: hover) and (pointer: fine) {
  .control:hover,
  .menu-list a:hover {
    cursor: pointer;
  }
}

@media (pointer: coarse) {
  .control,
  .menu-list a,
  .page-nav a,
  .foot-stmt__meta a {
    min-height: 2.75rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: var(--dur-micro) !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: var(--dur-micro) !important;
  }
}

@media print {
  .site-nav,
  .menu-panel,
  .menu-scrim,
  .reading-progress,
  .skip-link,
  .page-nav {
    display: none !important;
  }

  body {
    background: var(--color-paper);
    color: var(--color-ink);
  }

  .shell,
  .prose,
  .graph-figure {
    width: 100%;
    max-width: none;
    margin-inline: 0;
  }

  a {
    text-decoration: underline;
  }
}