:root {
  --color-surface: #292529;
  --color-surface-alt: #383338;
  --color-surface-deep: #4a444a;
  --color-ink: #ccc1cd;
  --color-ink-soft: #9f8da0;
  --color-ink-muted: #89758a;
  --color-line: #464147;
  --color-primary: #cd3cd3;
  --color-primary-ink: #181118;
  --color-primary-soft: #402841;
  --color-accent: #99db24;
  --color-accent-ink: #181118;
  --color-highlight: #3d4628;
  --color-focus: #9ce817;
  --color-contrast-surface: #f0eef0;
  --color-contrast-ink: #353036;
  --color-contrast-line: #c7c4c7;
  --color-contrast-accent: #537613;
  --overlay-scrim: linear-gradient(180deg, rgba(240, 238, 240, 0.35) 0%, rgba(240, 238, 240, 0.72) 55%, rgba(240, 238, 240, 0.92) 100%);
  --font-heading: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-body: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --text-xs: 10.1px;
  --text-sm: 14.3px;
  --text-base: 17px;
  --text-lg: 24.0px;
  --text-xl: 34.0px;
  --text-2xl: 48.1px;
  --text-3xl: 68.0px;
  --text-4xl: 96.1px;
  --text-display: clamp(49px, 10.0vw, 128px);
  --text-figure: clamp(40px, 7.2vw, 92px);
  --weight-heading: 628;
  --weight-body: 400;
  --leading-body: 1.71;
  --leading-heading: 1.27;
  --tracking-heading: -0.002em;
  --radius-sm: 8px;
  --radius-md: 9px;
  --radius-lg: 10px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 2px;
  --shadow-1: 0 0 0 1px rgba(153, 219, 36, 0.35);
  --shadow-2: 0 0 28px rgba(153, 219, 36, 0.35);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1240px;
  --measure: 67ch;
  --gutter: 24px;
  --section-y: 95px;
  --section-y-lg: 133px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, picture, svg, video {
  display: block;
  max-width: 100%;
  height: auto;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

p, figure, blockquote, dl, dd { margin: 0; }

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

hr { border: 0; margin: 0; }

[hidden] { display: none !important; }

[id] { scroll-margin-top: calc(var(--space-8) * 3); }

::selection {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
}

:focus-visible {
  outline: var(--border-thick) solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.site-footer :focus-visible {
  outline-color: var(--color-contrast-accent);
}

/* ============ 基础排版 ============ */
h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

.mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
}

.muted { color: var(--color-ink-muted); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-pill);
  color: var(--color-primary);
  background-color: var(--color-primary-soft);
}

.display-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-display);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
}

.stat-figure {
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  line-height: 0.92;
  letter-spacing: -0.02em;
  color: var(--color-accent);
}

.prose {
  max-width: var(--measure);
}

.prose > * + * { margin-top: var(--space-3); }
.prose h2 { font-size: var(--text-xl); margin-top: var(--space-6); }
.prose h3 { font-size: var(--text-lg); margin-top: var(--space-4); }
.prose strong { color: var(--color-ink); font-weight: var(--weight-heading); }

.prose a {
  border-bottom: var(--border-thin) solid var(--color-primary);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.prose a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.prose ul { display: grid; gap: var(--space-2); }

.prose li {
  position: relative;
  padding-left: var(--space-3);
}

.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: 2px;
}

.prose blockquote {
  border-left: var(--border-thick) solid var(--color-primary);
  padding-left: var(--space-3);
  color: var(--color-ink-soft);
}

.prose code {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  background-color: var(--color-primary-soft);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

/* ============ 布局基础 ============ */
.shell {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background-color: var(--color-surface-alt); }
.section--deep { background-color: var(--color-surface-deep); }

.rule-thin { border-top: var(--border-thin) solid var(--color-line); }
.rule-thick { border-top: var(--border-thick) solid var(--color-line); }
.rule-double { border-top: 4px double var(--color-line); }

.stack > * + * { margin-top: var(--space-3); }

.grid {
  display: grid;
  gap: var(--space-4) var(--gutter);
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

.layout-split {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  gap: var(--space-6) var(--gutter);
  align-items: start;
}

.rail {
  position: sticky;
  top: calc(var(--space-8) * 3);
}

/* ============ 页头 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-surface);
  border-bottom: 4px double var(--color-line);
}

.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -96px;
  z-index: 200;
  display: inline-block;
  padding: 10px 18px;
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: top 0.16s ease;
}

.skip-link:focus { top: 0; }

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-accent);
  box-shadow: var(--shadow-2);
  transform: scaleX(0);
  transform-origin: 0 50%;
  pointer-events: none;
  z-index: 120;
}

.header-rail {
  background-color: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.header-rail__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 42px;
  padding-block: var(--space-1);
}

.header-rail__brand,
.header-rail__meta {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
}

.header-rail__brand { color: var(--color-ink-soft); }

.header-rail__meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--color-ink-muted);
}

.header-rail__sep { color: var(--color-line); }

.masthead { border-bottom: var(--border-thin) solid var(--color-line); }

.masthead__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: var(--space-3);
  padding-block: var(--space-4);
}

.masthead__aside {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.masthead__quick {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  padding-bottom: 3px;
  border-bottom: var(--border-thin) solid var(--color-primary);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.masthead__quick:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.masthead__brand {
  grid-column: 2;
  justify-self: center;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}

.masthead__mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: none;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: 1;
  box-shadow: var(--shadow-1);
}

.masthead__text { display: grid; gap: 2px; min-width: 0; }

.masthead__name {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  white-space: nowrap;
}

.masthead__sub {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
  white-space: nowrap;
}

.masthead__cta {
  grid-column: 3;
  justify-self: end;
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border: var(--border-thin) solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  white-space: nowrap;
  transition: background-color 0.18s ease, color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.masthead__cta:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  padding: 8px 12px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  transition: border-color 0.18s ease, color 0.18s ease;
}

.nav-toggle:hover { border-color: var(--color-primary); }

.nav-toggle__bars {
  display: grid;
  gap: 3px;
  width: 16px;
}

.nav-toggle__bars i {
  display: block;
  height: 1px;
  background-color: var(--color-primary);
}

.nav-toggle__label { line-height: 1; }

.site-nav {
  background-color: var(--color-surface);
  border-top: var(--border-thin) solid var(--color-line);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-nav__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

.site-nav__link {
  display: block;
  padding: var(--space-3) var(--space-3);
  border-bottom: var(--border-thick) solid transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: 0.04em;
  transition: color 0.18s ease, border-color 0.18s ease;
}

.site-nav__link:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-primary);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ============ 页脚 ============ */
.site-footer {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: 4px double var(--color-contrast-line);
  margin-top: var(--section-y);
}

.footer__inner { padding-block: var(--space-8) var(--space-6); }

.footer__masthead {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.footer__brand { display: grid; gap: var(--space-1); }

.footer__mark {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
}

.footer__name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.footer__tag {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: color-mix(in srgb, var(--color-contrast-ink) 68%, transparent);
}

.to-top {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 10px 16px;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  color: var(--color-contrast-ink);
  background-color: transparent;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  transition: color 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.to-top:hover {
  color: var(--color-contrast-accent);
  border-color: var(--color-contrast-accent);
  transform: translateY(-2px);
}

.footer__rule {
  margin-top: var(--space-6);
  border-top: 4px double var(--color-contrast-line);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr)) minmax(0, 1.35fr);
  gap: var(--space-6) var(--gutter);
  margin-top: var(--space-6);
}

.footer__col { min-width: 0; }

.footer__col-title {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thick) solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  color: var(--color-contrast-ink);
}

.footer__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-contrast-accent);
}

.footer__links {
  display: grid;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.footer__links a {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: var(--border-thin) solid transparent;
  color: color-mix(in srgb, var(--color-contrast-ink) 82%, transparent);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.footer__links a:hover {
  color: var(--color-contrast-accent);
  border-bottom-color: var(--color-contrast-accent);
}

.footer__contact {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.footer__contact li {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.footer__label {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.12em;
  color: color-mix(in srgb, var(--color-contrast-ink) 58%, transparent);
}

.footer__value {
  font-size: var(--text-base);
  color: var(--color-contrast-ink);
  overflow-wrap: anywhere;
}

.footer__value--mono {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
}

.footer__legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  margin-top: var(--space-8);
  padding-top: var(--space-3);
  border-top: 4px double var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: color-mix(in srgb, var(--color-contrast-ink) 74%, transparent);
}

/* ============ 通用组件 ============ */
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.crumbs li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: var(--color-line);
}

.crumbs a:hover { color: var(--color-accent); }

.section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 4px double var(--color-line);
}

.section-head__no {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--color-primary);
}

.section-head__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-xl);
  line-height: var(--leading-heading);
}

.section-head__note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.frame-hero {
  position: relative;
  padding: clamp(24px, 4vw, 64px);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-alt);
  overflow: hidden;
}

.frame-hero::before {
  content: "";
  position: absolute;
  inset: 10px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  opacity: 0.5;
  pointer-events: none;
}

.frame-hero > * { position: relative; z-index: 1; }

.ticks {
  height: 12px;
  background-image: repeating-linear-gradient(90deg, var(--color-line) 0 1px, transparent 1px 14px);
}

.ticks--primary {
  background-image: repeating-linear-gradient(90deg, var(--color-primary) 0 1px, transparent 1px 14px);
  opacity: 0.6;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 12px 20px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  transition: border-color 0.18s ease, color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.btn:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-1);
  transform: translateY(-2px);
}

.btn--ghost {
  background-color: transparent;
  color: var(--color-ink-soft);
}

.btn--ghost:hover {
  color: var(--color-ink);
  background-color: var(--color-surface-deep);
}

.btn--accent {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: transparent;
}

.btn--accent:hover {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
  box-shadow: var(--shadow-2);
}

.btn--primary {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.btn--primary:hover {
  box-shadow: 0 0 22px color-mix(in srgb, var(--color-primary) 55%, transparent);
}

.btn--block { width: 100%; }

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 15px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
  background-color: transparent;
  color: var(--color-ink-soft);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.chip:hover {
  color: var(--color-ink);
  border-color: var(--color-primary);
}

.chip[aria-pressed="true"] {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-highlight);
}

.filter-bar__count {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.log { border-top: var(--border-thick) solid var(--color-line); }

.log__item {
  display: grid;
  grid-template-columns: minmax(110px, 150px) minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  padding-block: var(--space-3);
  padding-inline: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  transition: background-color 0.18s ease, box-shadow 0.18s ease;
}

.log__item:hover {
  background-color: var(--color-highlight);
  box-shadow: inset var(--border-thick) 0 0 var(--color-primary);
}

.log__stamp {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

.log__title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.log__body {
  margin-top: var(--space-1);
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-base);
}

.table th,
.table td {
  padding: var(--space-3);
  text-align: left;
  vertical-align: top;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.table thead th {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: var(--weight-body);
  letter-spacing: 0.1em;
  color: var(--color-ink-soft);
  border-bottom: var(--border-thick) solid var(--color-line);
}

.table tbody tr { transition: background-color 0.18s ease; }
.table tbody tr:hover { background-color: var(--color-highlight); }

.figure { margin: 0; }

.figure__frame {
  position: relative;
  padding: var(--space-2);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  box-shadow: var(--shadow-1);
  overflow: hidden;
}

.figure__img {
  width: 100%;
  border-radius: var(--radius-md);
  border: var(--border-thin) solid var(--color-line);
  object-fit: cover;
}

.figure__cap {
  margin-top: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.08em;
  color: var(--color-ink-soft);
}

.figure--overlay .figure__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.figure--overlay .figure__cap {
  color: var(--color-contrast-ink);
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1080px) {
  .footer__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer__col--contact { grid-column: span 3; }
}

@media (max-width: 920px) {
  :root { --section-y: 72px; --section-y-lg: 96px; }

  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .col-3 { grid-column: span 3; }
  .col-4 { grid-column: span 3; }
  .col-5 { grid-column: span 6; }
  .col-6 { grid-column: span 6; }
  .col-7 { grid-column: span 6; }
  .col-8 { grid-column: span 6; }
  .col-9 { grid-column: span 6; }

  .layout-split { grid-template-columns: minmax(0, 1fr); }
  .rail {
    position: static;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    overflow-x: auto;
    padding-block: var(--space-2);
    border-bottom: var(--border-thick) solid var(--color-line);
    white-space: nowrap;
  }

  .nav-toggle { display: inline-flex; }
  .masthead__quick { display: none; }

  .site-nav { display: none; }

  .site-header[data-open] .site-nav {
    display: block;
    border-top: var(--border-thin) solid var(--color-primary);
  }

  .site-nav__inner { justify-content: flex-start; }

  .site-nav__list {
    flex-wrap: nowrap;
    justify-content: flex-start;
    gap: var(--space-1);
    overflow-x: auto;
    padding-block: var(--space-1);
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
  }

  .site-nav__link {
    white-space: nowrap;
    padding: var(--space-2) var(--space-2);
  }

  .masthead__inner { padding-block: var(--space-3); }
  .masthead__mark { width: 38px; height: 38px; font-size: var(--text-base); }
  .masthead__name { font-size: var(--text-lg); }
  .masthead__sub { display: none; }
  .masthead__cta { padding: 9px 12px; letter-spacing: 0.06em; }

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

@media (max-width: 720px) {
  .header-rail__brand { font-size: var(--text-sm); letter-spacing: 0.06em; }
  .header-rail__meta { gap: var(--space-1); }

  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__col--contact { grid-column: span 2; }
  .footer__legal { justify-content: flex-start; }
}

@media (max-width: 620px) {
  .grid { grid-template-columns: minmax(0, 1fr); }
  .grid > [class*="col-"] { grid-column: 1 / -1; }

  .masthead__mark { display: none; }
  .masthead__brand { justify-self: center; }
  .masthead__cta { font-size: var(--text-sm); padding: 8px 10px; }
  .nav-toggle { padding: 8px 10px; }

  .footer__grid { grid-template-columns: minmax(0, 1fr); }
  .footer__col--contact { grid-column: span 1; }
  .footer__name { font-size: var(--text-xl); }

  .table { font-size: var(--text-sm); }
  .table th, .table td { padding: var(--space-2); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .btn:hover,
  .masthead__cta:hover,
  .to-top:hover {
    transform: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}