/* Hallmark · genre: editorial · macrostructure: Map/Diagram (station line) · theme: Nightchart · enrichment: chart hairlines + station marks · nav: N3 · footer: Ft6 */

/* ==========================================================================
 * Nightchart — 夜航图
 * axes: paper=twilight lavender (mid) / deep violet (dark) · display=variable
 * grotesque (Bricolage Grotesque, sentence case) · accent=orchid (hue 330)
 * ========================================================================== */

:root {
  --color-paper: oklch(86% 0.035 300);
  --color-paper-2: oklch(81% 0.042 300);
  --color-paper-3: oklch(91% 0.028 300);
  --color-rule: oklch(58% 0.05 302);
  --color-neutral: oklch(52% 0.05 300);
  --color-muted: oklch(40% 0.055 300);
  --color-ink: oklch(21% 0.06 300);
  --color-ink-body: oklch(30% 0.05 301);
  --color-accent: oklch(36% 0.17 330);
  --color-accent-ink: oklch(96% 0.02 320);
  --color-accent-soft: oklch(36% 0.17 330 / 0.12);
  --color-focus: oklch(33% 0.18 330);
  --color-grid: oklch(58% 0.05 302 / 0.30);

  --font-display: "Bricolage Grotesque", "Inter", -apple-system, "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-body: "Inter", -apple-system, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, "SF Mono",
    "Noto Sans Mono CJK SC", Consolas, monospace;

  --text-xs: 0.72rem;
  --text-sm: 0.85rem;
  --text-base: 1rem;
  --text-md: 1.2rem;
  --text-lg: 1.5rem;
  --text-xl: 1.9rem;
  --text-2xl: 2.4rem;
  --text-display: clamp(2.6rem, 6vw + 1rem, 5rem);

  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-micro: 120ms;
  --dur-short: 220ms;
  --dur-long: 420ms;

  --rule-hair: 1px;
  --nc-rail: 15rem;
  --nc-gutter: clamp(1rem, 4vw, 2.5rem);

  --z-base: 1;
  --z-sticky: 200;
  --z-sticky-nav: 300;
  --z-dropdown: 400;
}

html[data-theme="dark"] {
  --color-paper: oklch(20% 0.04 296);
  --color-paper-2: oklch(24% 0.045 296);
  --color-paper-3: oklch(28% 0.05 298);
  --color-rule: oklch(44% 0.055 300);
  --color-neutral: oklch(58% 0.045 300);
  --color-muted: oklch(74% 0.04 300);
  --color-ink: oklch(94% 0.02 300);
  --color-ink-body: oklch(85% 0.028 300);
  --color-accent: oklch(77% 0.15 330);
  --color-accent-ink: oklch(18% 0.04 300);
  --color-accent-soft: oklch(77% 0.15 330 / 0.18);
  --color-focus: oklch(82% 0.14 330);
  --color-grid: oklch(74% 0.04 300 / 0.18);
}

@media (prefers-color-scheme: dark) {
  html[data-theme="system"],
  html:not([data-theme]) {
    --color-paper: oklch(20% 0.04 296);
    --color-paper-2: oklch(24% 0.045 296);
    --color-paper-3: oklch(28% 0.05 298);
    --color-rule: oklch(44% 0.055 300);
    --color-neutral: oklch(58% 0.045 300);
    --color-muted: oklch(74% 0.04 300);
    --color-ink: oklch(94% 0.02 300);
    --color-ink-body: oklch(85% 0.028 300);
    --color-accent: oklch(77% 0.15 330);
    --color-accent-ink: oklch(18% 0.04 300);
    --color-accent-soft: oklch(77% 0.15 330 / 0.18);
    --color-focus: oklch(82% 0.14 330);
    --color-grid: oklch(74% 0.04 300 / 0.18);
  }
}

* { box-sizing: border-box; }
html { overflow-x: clip; }
body {
  overflow-x: clip;
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink-body);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  font-variant-numeric: tabular-nums;
}
img { max-width: 100%; height: auto; }
a { color: var(--color-accent); }
a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}
::selection { background: var(--color-accent-soft); }

/* ---------- 图脊导航（N3 side-rail / chart spine） ---------- */
.nc-header {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky-nav);
  background: var(--color-paper);
  border-bottom: var(--rule-hair) solid var(--color-rule);
}
.nc-bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) max(var(--nc-gutter), env(safe-area-inset-left));
}
.nc-mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  letter-spacing: -0.02em;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
}
.nc-mark:hover, .nc-mark:focus-visible { color: var(--color-accent); }
.nc-loc {
  display: none;
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  white-space: nowrap;
}
.nc-burger {
  flex: 0 0 auto;
  display: grid;
  place-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  background: none;
  border: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink);
  cursor: pointer;
}
.nc-burger__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform var(--dur-short) var(--ease-out);
}
#siteHeader.nav-open .nc-burger__bar:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
#siteHeader.nav-open .nc-burger__bar:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}
.nc-panel {
  display: none;
  padding: 0 max(var(--nc-gutter), env(safe-area-inset-left)) var(--space-lg);
  border-top: var(--rule-hair) solid var(--color-rule);
}
#siteHeader.nav-open .nc-panel { display: block; }

.nc-nav { display: flex; flex-direction: column; }
.nc-nav .nav-link {
  display: flex;
  align-items: baseline;
  gap: var(--space-xs);
  padding: var(--space-xs) 0;
  border-bottom: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink-body);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out),
    transform var(--dur-short) var(--ease-out);
}
.nc-nav .nav-link__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  transition: color var(--dur-micro) var(--ease-out);
}
.nc-nav .nav-link:hover,
.nc-nav .nav-link:focus-visible { color: var(--color-accent); }
.nc-nav .nav-link.active { color: var(--color-ink); }
.nc-nav .nav-link.active .nav-link__num { color: var(--color-accent); }

.nc-tools {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-md);
}
.theme-switch { display: inline-flex; border: var(--rule-hair) solid var(--color-rule); }
.theme-choice {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  padding: 0.4rem 0.7rem;
  background: none;
  border: 0;
  color: var(--color-muted);
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--dur-micro) var(--ease-out),
    color var(--dur-micro) var(--ease-out);
}
.theme-choice + .theme-choice { border-inline-start: var(--rule-hair) solid var(--color-rule); }
.theme-choice:hover { color: var(--color-ink); }
.theme-choice[aria-pressed="true"] {
  background: var(--color-ink);
  color: var(--color-paper);
}
.lang-switch-group { display: inline-flex; flex-wrap: wrap; gap: var(--space-2xs) var(--space-xs); }
.lang-switch {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-muted);
  text-decoration: none;
  border-bottom: var(--rule-hair) dashed transparent;
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out),
    border-color var(--dur-micro) var(--ease-out);
}
.lang-switch:hover, .lang-switch:focus-visible {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}
.lang-switch--current {
  color: var(--color-ink);
  border-bottom-color: var(--color-accent);
}
/* 移动端只保留抽屉式语言切换；桌面图脊用内联切换 */
.nc-tools .lang-switch-group { display: none; }

.lang-drawer { position: relative; }
.lang-drawer__toggle {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  width: 100%;
  padding: var(--space-xs) 0;
  background: none;
  border: 0;
  border-block: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink-body);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
}
.lang-drawer__toggle-current { color: var(--color-accent); }
.lang-drawer__arrow {
  margin-inline-start: auto;
  width: 7px;
  height: 7px;
  border-inline-end: 1.5px solid currentColor;
  border-block-end: 1.5px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--dur-short) var(--ease-out);
}
.lang-drawer.is-open .lang-drawer__arrow { transform: rotate(-135deg); }
.lang-drawer__panel { display: none; }
.lang-drawer.is-open .lang-drawer__panel { display: block; }
.lang-drawer__panel-inner { display: flex; flex-direction: column; }
.lang-drawer__btn {
  padding: var(--space-xs) 0;
  border-bottom: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink-body);
  text-decoration: none;
  white-space: nowrap;
}
.lang-drawer__btn:last-child { border-bottom: 0; }
.lang-drawer__btn:hover, .lang-drawer__btn:focus-visible { color: var(--color-accent); }
.lang-drawer__btn--current { color: var(--color-accent); }

.nc-spine-note {
  margin: var(--space-md) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}

/* ---------- 页面容器 ---------- */
.nc-main { min-width: 0; }
.nc-sheet {
  max-width: 66rem;
  margin-inline: auto;
  padding-block: var(--space-xl) var(--space-3xl);
  padding-inline-start: max(var(--nc-gutter), env(safe-area-inset-left));
  padding-inline-end: max(var(--nc-gutter), env(safe-area-inset-right));
}

/* ---------- 首页 hero ---------- */
.nc-hero { position: relative; padding-block: 0 var(--space-2xl); }
.nc-hero::before {
  content: "";
  position: absolute;
  inset: calc(var(--space-sm) * -1) 0 0;
  background-image:
    linear-gradient(to right, var(--color-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-grid) 1px, transparent 1px);
  background-size: var(--space-lg) var(--space-lg);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
  z-index: 0;
}
.nc-hero > * { position: relative; z-index: 1; }
.nc-hero__coord {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin: 0 0 var(--space-lg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.nc-dot {
  flex: 0 0 auto;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
}
.nc-hero__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-display);
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
}
.nc-hero__role {
  margin: var(--space-sm) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.nc-hero__lede {
  margin: var(--space-lg) 0 0;
  max-width: 34ch;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}
.nc-hero__intro {
  margin: var(--space-sm) 0 0;
  max-width: 58ch;
  color: var(--color-ink-body);
}
.nc-hero__skills {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-xs);
  margin: var(--space-lg) 0 0;
  font-size: var(--text-sm);
  color: var(--color-muted);
}
.nc-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  border: var(--rule-hair) solid var(--color-rule);
  padding: 0.1rem 0.5rem;
  white-space: nowrap;
}

/* ---------- 航线路（Map / Diagram） ---------- */
.nc-chart {
  margin-block: 0 var(--space-2xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}
.nc-chart__line {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.nc-station { position: relative; padding-inline-start: var(--space-sm); }
.nc-station::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: var(--rule-hair);
  background: var(--color-rule);
}
.nc-station::after {
  content: "";
  position: absolute;
  inset-block-start: calc(var(--space-md) + 0.35rem);
  inset-inline-start: -3.5px;
  width: 7px;
  height: 7px;
  background: var(--color-paper);
  border: 1.5px solid var(--color-accent);
  transform: rotate(45deg);
}
.nc-station a {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-md) var(--space-sm) var(--space-md) var(--space-md);
  text-decoration: none;
  color: inherit;
  white-space: nowrap;
}
.nc-station__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-muted);
}
.nc-station__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  color: var(--color-ink);
  transition: color var(--dur-micro) var(--ease-out);
}
.nc-station a:hover .nc-station__name,
.nc-station a:focus-visible .nc-station__name { color: var(--color-accent); }
.nc-station:last-child { border-block-end: var(--rule-hair) solid var(--color-rule); }

/* ---------- 区块与列表 ---------- */
.nc-section { padding-block: 0 var(--space-2xl); }
.nc-section + .nc-section {
  border-block-start: var(--rule-hair) solid var(--color-rule);
  padding-block-start: var(--space-xl);
}
.nc-section:last-child { padding-block-end: 0; }
.nc-section__title {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-xl);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
}
.nc-list { display: flex; flex-direction: column; }
.row {
  position: relative;
  display: grid;
  align-items: baseline;
  gap: var(--space-sm) var(--space-md);
  padding: var(--space-md) var(--space-2xs) var(--space-md) var(--space-md);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: inherit;
  text-decoration: none;
  transition: transform var(--dur-short) var(--ease-out);
}
.row::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 2px;
  background: transparent;
  transition: background-color var(--dur-micro) var(--ease-out);
}
.nc-list .row:last-child { border-block-end: var(--rule-hair) solid var(--color-rule); }
.row--work { grid-template-columns: 3ch 7ch minmax(0, 1fr) minmax(0, 18ch); }
.row--post { grid-template-columns: 11ch minmax(0, 1fr) minmax(0, 14ch); }
.row__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-accent);
}
.row__date {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-muted);
}
.row__body { display: flex; flex-direction: column; gap: var(--space-2xs); min-width: 0; }
.row__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  line-height: 1.3;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  transition: color var(--dur-micro) var(--ease-out);
}
.row__summary, .row__excerpt {
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}
.row__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  align-items: flex-end;
  text-align: end;
  min-width: 0;
}
.row__role {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-body);
}
.row__tags {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-muted);
  overflow-wrap: anywhere;
}
.row:hover, .row:focus-visible { transform: translateX(3px); }
.row:hover::before, .row:focus-visible::before { background: var(--color-accent); }
.row:hover .row__title, .row:focus-visible .row__title { color: var(--color-accent); }

.contact-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-2xs);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: inherit;
  text-decoration: none;
}
.nc-list .contact-row:last-child { border-block-end: var(--rule-hair) solid var(--color-rule); }
.contact-row__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
  white-space: nowrap;
}
.contact-row__value {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
  transition: color var(--dur-micro) var(--ease-out);
}
a.contact-row:hover .contact-row__value,
a.contact-row:focus-visible .contact-row__value { color: var(--color-accent); }

.nc-note {
  margin: 0;
  max-width: 62ch;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  line-height: 1.4;
  color: var(--color-ink);
}
.nc-more { margin: var(--space-md) 0 0; }
.nc-links { margin: var(--space-md) 0 0; display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-md); }
.essays-empty {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-muted);
}

/* ---------- 内页页头 ---------- */
.nc-sheet--page { padding-block-start: var(--space-2xl); }
.nc-pagehead { margin-block-end: var(--space-xl); }
.nc-eyebrow {
  margin: 0 0 var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.nc-pagehead__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw + 1rem, 3.4rem);
  line-height: 1.06;
  letter-spacing: -0.03em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
}
.nc-pagehead__lede {
  margin: var(--space-md) 0 0;
  max-width: 58ch;
  font-size: var(--text-md);
  line-height: 1.5;
  color: var(--color-muted);
}
.nc-rule-note {
  margin: var(--space-sm) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-accent);
}
.nc-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-2xl);
  margin: var(--space-lg) 0 0;
}
.nc-fact { display: flex; flex-direction: column; gap: var(--space-3xs); min-width: 0; }
.nc-fact dt {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.nc-fact dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  color: var(--color-ink);
  overflow-wrap: anywhere;
}
.nc-articlefoot { margin-block-start: var(--space-2xl); }

/* ---------- 长文 ---------- */
.nc-essay { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-xl); }
.essay-toc-wrap { min-width: 0; }
.essay-toc {
  border-block-start: var(--rule-hair) solid var(--color-rule);
  padding-block-start: var(--space-sm);
}
.essay-toc__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-xs);
}
.essay-toc__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.essay-toc__toggle {
  padding: 0;
  background: none;
  border: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  cursor: pointer;
  white-space: nowrap;
}
.toc__list {
  display: none;
  flex-direction: column;
  list-style: none;
  margin: var(--space-xs) 0 0;
  padding: 0;
}
.toc__list.is-open { display: flex; }
.toc__list a {
  display: flex;
  gap: var(--space-2xs);
  padding: var(--space-3xs) 0;
  font-size: var(--text-sm);
  color: var(--color-ink-body);
  text-decoration: none;
  min-width: 0;
}
.toc__list a .num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
}
.toc__text { min-width: 0; overflow-wrap: anywhere; }
.toc__list a:hover, .toc__list a:focus-visible { color: var(--color-accent); }
.toc__list a.active { color: var(--color-accent); }
.toc-group__head { display: flex; align-items: baseline; gap: var(--space-2xs); }
.toc-group__head a { flex: 1 1 auto; }
.toc-group-toggle {
  flex: 0 0 auto;
  padding: 0.05rem 0.35rem;
  background: none;
  border: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-muted);
  cursor: pointer;
  white-space: nowrap;
}
.toc-subs {
  list-style: none;
  margin: 0;
  padding-inline-start: var(--space-md);
  display: flex;
  flex-direction: column;
}
.toc-subs a { font-size: var(--text-xs); color: var(--color-muted); }
.toc-progress {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-block-start: var(--space-sm);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
}
.toc-progress__track { flex: 1 1 auto; display: block; height: 2px; background: var(--color-rule); }
.toc-progress__bar { display: block; width: 0; height: 100%; background: var(--color-accent); }

/* ---------- 正文 ---------- */
.prose {
  max-width: 68ch;
  margin-inline: auto;
  min-width: 0;
  color: var(--color-ink-body);
  font-size: var(--text-base);
  line-height: 1.78;
}
.prose > * + * { margin-block-start: var(--space-md); }
.prose h2 {
  margin-block: var(--space-2xl) var(--space-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
}
.prose h3 {
  margin-block: var(--space-xl) 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  letter-spacing: -0.01em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}
.prose ul, .prose ol { padding-inline-start: 1.3em; }
.prose li + li { margin-block-start: var(--space-3xs); }
.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}
.prose a:hover { text-decoration-thickness: 2px; }
.prose strong { color: var(--color-ink); }
.prose blockquote {
  margin-inline: 0;
  padding-inline-start: var(--space-md);
  border-inline-start: var(--rule-hair) solid var(--color-accent);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  line-height: 1.5;
  color: var(--color-muted);
}
.prose hr { border: 0; border-block-start: var(--rule-hair) solid var(--color-rule); margin-block: var(--space-xl); }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  padding: 0.08em 0.34em;
}
.prose pre {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  line-height: 1.7;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  padding: var(--space-sm) var(--space-md);
  overflow-x: auto;
}
.prose pre code { background: none; border: 0; padding: 0; }
.prose mark { background: var(--color-accent-soft); color: var(--color-ink); padding: 0 0.2em; }
.prose img { display: block; margin-inline: auto; }
.table-wrap { overflow-x: auto; }
.prose table { width: 100%; border-collapse: collapse; font-size: var(--text-sm); }
.prose th, .prose td {
  padding: var(--space-xs) var(--space-sm);
  border-block-end: var(--rule-hair) solid var(--color-rule);
  text-align: start;
}
.prose th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.prose-figure { margin-block: var(--space-xl); }
.prose-figure figcaption {
  padding-block-start: var(--space-xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-muted);
}
.callout {
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
  padding: var(--space-sm) var(--space-md);
}
.callout__label {
  margin: 0 0 var(--space-2xs);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.callout__body > * + * { margin-block-start: var(--space-xs); }
.essay-cover { margin: 0 0 var(--space-xl); }
.essay-cover img { display: block; width: 100%; }
.essay-end {
  margin-block-start: var(--space-xl);
  text-align: center;
  letter-spacing: 0.5em;
  color: var(--color-accent);
}

/* ---------- 分页 ---------- */
.pager {
  display: flex;
  flex-wrap: nowrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md) var(--space-lg);
  margin-block: var(--space-xs) var(--space-md);
  padding-block-start: var(--space-md);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}
.pager__item { flex: 0 1 50%; min-width: 0; display: flex; flex-direction: column; gap: var(--space-3xs); text-decoration: none; color: inherit; }
.pager__item:only-child { flex: 0 1 auto; max-width: 100%; }
.pager__item--next { text-align: end; margin-inline-start: auto; }
.pager__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  white-space: nowrap;
}
.pager__title {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--color-ink);
  overflow-wrap: anywhere;
  min-width: 0;
  transition: color var(--dur-micro) var(--ease-out);
}
.pager__item:hover .pager__title, .pager__item:focus-visible .pager__title { color: var(--color-accent); }

/* ---------- 风格档案卡片 ---------- */
.nc-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: var(--space-xl) var(--space-lg);
}
.style-card { position: relative; display: flex; flex-direction: column; gap: var(--space-xs); }
.style-card__preview { display: block; line-height: 0; border: var(--rule-hair) solid var(--color-rule); }
.style-card__preview img { display: block; width: 100%; }
.style-card__meta { display: flex; flex-direction: column; gap: var(--space-3xs); }
.style-card__week {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-muted);
}
.style-card__name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-md);
  color: var(--color-ink);
}
.style-card__summary { margin: 0; font-size: var(--text-sm); color: var(--color-muted); }
.style-card__badge {
  align-self: flex-start;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-accent);
  border: var(--rule-hair) solid var(--color-accent);
  padding: 0.05rem 0.45rem;
}
.style-card__link { margin-block-start: var(--space-2xs); }

/* ---------- 链接与浮动控件 ---------- */
.text-link {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: var(--rule-hair) solid var(--color-rule);
  white-space: nowrap;
  transition: border-color var(--dur-micro) var(--ease-out);
}
.text-link:hover, .text-link:focus-visible { border-bottom-color: var(--color-accent); }
.to-top {
  position: fixed;
  inset-block-end: max(var(--space-md), env(safe-area-inset-bottom));
  inset-inline-end: var(--space-md);
  width: 44px;
  height: 44px;
  display: grid;
  place-content: center;
  background: var(--color-paper);
  border: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-short) var(--ease-out),
    transform var(--dur-short) var(--ease-out);
  z-index: var(--z-sticky);
}
.to-top.show { opacity: 1; pointer-events: auto; }
.to-top:hover { transform: translateY(-2px); }
.reading-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline-start: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left center;
  z-index: var(--z-sticky-nav);
  pointer-events: none;
}

/* ---------- 页脚（Ft6 letter close） ---------- */
.nc-foot {
  padding-block: var(--space-2xl) var(--space-xl);
  padding-inline-start: max(var(--nc-gutter), env(safe-area-inset-left));
  padding-inline-end: max(var(--nc-gutter), env(safe-area-inset-right));
  border-block-start: var(--rule-hair) solid var(--color-rule);
}
.nc-foot__letter, .nc-foot__meta { max-width: 66rem; margin-inline: auto; }
.nc-foot__line {
  margin: 0;
  max-width: 40ch;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  line-height: 1.35;
  color: var(--color-ink);
}
.nc-foot__sign {
  margin: var(--space-sm) 0 var(--space-xl);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.nc-foot__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-xs) var(--space-md);
  padding-block-start: var(--space-sm);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-muted);
}
.nc-foot__meta .text-link { font-size: var(--text-xs); }
.colophon__admin, .colophon__icp { color: inherit; }

/* ---------- 语言根页 ---------- */
.nc-sheet--root {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-2xl);
  min-height: 100svh;
}
.nc-root-coord {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin: 0 0 var(--space-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-muted);
}
.nc-root-name {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--text-display);
  line-height: 1.05;
  letter-spacing: -0.035em;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}
.nc-root-alt {
  margin: var(--space-xs) 0 0;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.nc-root-role { margin: var(--space-sm) 0 0; color: var(--color-ink-body); }
.nc-root-list { display: flex; flex-direction: column; }
.root-link {
  display: grid;
  grid-template-columns: 3ch minmax(0, 1fr) auto;
  align-items: baseline;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-2xs);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-md);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-micro) var(--ease-out),
    transform var(--dur-short) var(--ease-out);
}
.nc-root-list .root-link:last-child { border-block-end: var(--rule-hair) solid var(--color-rule); }
.root-link .num { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-accent); }
.root-link .arrow { font-family: var(--font-mono); color: var(--color-muted); }
.root-link:hover, .root-link:focus-visible { color: var(--color-accent); transform: translateX(4px); }

/* ---------- 入场与滚动显现 ---------- */
@keyframes nc-rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}
.nc-hero__coord, .nc-hero__name, .nc-hero__role,
.nc-hero__lede, .nc-hero__intro, .nc-hero__skills {
  animation: nc-rise 0.55s var(--ease-out) both;
  animation-fill-mode: backwards;
}
.nc-hero__coord { animation-delay: 0.04s; }
.nc-hero__name { animation-delay: 0.12s; }
.nc-hero__role { animation-delay: 0.2s; }
.nc-hero__lede { animation-delay: 0.28s; }
.nc-hero__intro { animation-delay: 0.34s; }
.nc-hero__skills { animation-delay: 0.4s; }
.nc-station { animation: nc-rise 0.5s var(--ease-out) both; animation-fill-mode: backwards; }
.nc-station:nth-child(1) { animation-delay: 0.1s; }
.nc-station:nth-child(2) { animation-delay: 0.18s; }
.nc-station:nth-child(3) { animation-delay: 0.26s; }
.nc-station:nth-child(4) { animation-delay: 0.34s; }
.nc-station:nth-child(5) { animation-delay: 0.42s; }

.js-reveal { opacity: 0; transform: translateY(10px); }
.js-reveal.is-inview {
  opacity: 1;
  transform: none;
  transition: opacity var(--dur-long) var(--ease-out),
    transform var(--dur-long) var(--ease-out);
  transition-delay: var(--reveal-delay, 0ms);
}

/* ---------- 响应式 ---------- */
@media (min-width: 48rem) {
  .nc-loc { display: block; margin-inline-start: auto; }
  .nc-chart__line { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .nc-station { padding-inline-start: 0; }
  .nc-station::before { inset-block: 0; inset-inline-start: 0; width: var(--rule-hair); }
  .nc-station::after { inset-inline-start: -3.5px; }
  .nc-station:last-child { border-block-end: 0; }
  .nc-station a { padding: var(--space-md) var(--space-sm) var(--space-sm) var(--space-md); }
  .nc-chart { border-block-end: var(--rule-hair) solid var(--color-rule); }
}

@media (min-width: 60rem) {
  .nc-header {
    position: fixed;
    inset-block: 0;
    inset-inline-start: 0;
    display: flex;
    flex-direction: column;
    inline-size: var(--nc-rail);
    overflow-y: auto;
    border-bottom: 0;
    border-inline-end: var(--rule-hair) solid var(--color-rule);
    padding: var(--space-lg) var(--space-md) var(--space-md);
  }
  .nc-bar {
    flex-wrap: wrap;
    gap: var(--space-2xs);
    padding: 0 0 var(--space-md);
    border-bottom: var(--rule-hair) solid var(--color-rule);
  }
  .nc-loc { margin-inline-start: 0; flex-basis: 100%; }
  .nc-burger { display: none; }
  .nc-panel {
    display: flex;
    flex: 1 1 auto;
    flex-direction: column;
    padding: var(--space-md) 0 0;
    border-top: 0;
  }
  .nc-nav .nav-link { font-size: var(--text-base); padding: var(--space-2xs) 0; }
  .nc-tools {
    margin-block-start: auto;
    padding-block-start: var(--space-lg);
  }
  .nc-tools__drawer { display: none; }
  .nc-tools .lang-switch-group { display: inline-flex; }
  .theme-switch { flex-direction: column; align-self: flex-start; }
  .theme-choice + .theme-choice {
    border-inline-start: 0;
    border-block-start: var(--rule-hair) solid var(--color-rule);
  }
  .nc-main, .nc-foot { margin-inline-start: var(--nc-rail); }
  .reading-progress { inset-inline-start: var(--nc-rail); width: calc(100% - var(--nc-rail)); }
  .nc-sheet { padding-block-start: var(--space-3xl); }
  .nc-sheet--page { padding-block-start: var(--space-2xl); }
  .nc-essay {
    grid-template-columns: minmax(0, 20ch) minmax(0, 1fr);
    gap: var(--space-2xl);
    align-items: start;
  }
  .essay-toc { position: sticky; top: var(--space-md); }
  .essay-toc__toggle { display: none; }
  .toc__list { display: flex; }
}

@media (max-width: 40rem) {
  .nc-hero__lede { max-width: none; }
  .row--work {
    grid-template-columns: 3ch minmax(0, 1fr);
    row-gap: var(--space-2xs);
  }
  .row--work .row__date { display: none; }
  .row--work .row__body { grid-column: 2; grid-row: 1; }
  .row--work .row__meta { grid-column: 2; grid-row: 2; align-items: flex-start; text-align: start; }
  .row--post { grid-template-columns: minmax(0, 1fr); row-gap: var(--space-2xs); }
  .row--post .row__num { display: none; }
  .row--post .row__tags { grid-column: 1; grid-row: 2; }
  .row__meta { align-items: flex-start; text-align: start; }
  .contact-row { flex-direction: column; gap: var(--space-2xs); }
  .pager { flex-direction: column; }
  .pager__item { flex: 1 1 auto; max-width: 100%; }
  .pager__item--next { text-align: start; margin-inline-start: 0; }
  .nc-facts { gap: var(--space-md); }
  .nc-foot__line { max-width: none; }
}

@media print {
  .nc-header, .to-top, .reading-progress, .nc-burger { display: none !important; }
  .nc-main, .nc-foot { margin-inline-start: 0 !important; }
  .nc-hero > *, .nc-station,
  .js-reveal, .js-reveal.is-inview {
    opacity: 1 !important;
    transform: none !important;
    animation: none !important;
  }
  body { background: #fff !important; color: #000 !important; }
  .prose a::after { content: " (" attr(href) ")"; font-size: 0.8em; color: #444; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 150ms !important;
  }
  .nc-hero__coord, .nc-hero__name, .nc-hero__role,
  .nc-hero__lede, .nc-hero__intro, .nc-hero__skills,
  .nc-station {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .js-reveal, .js-reveal.is-inview {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}