:root {
  --color-surface: #f6f6f6;
  --color-surface-alt: #eeeded;
  --color-surface-deep: #e2e1e0;
  --color-ink: #4d4441;
  --color-ink-soft: #766966;
  --color-ink-muted: #877a78;
  --color-line: #d8d6d5;
  --color-primary: #cb4c2f;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #f0deda;
  --color-accent: #257abc;
  --color-accent-ink: #ffffff;
  --color-highlight: #d0e0ec;
  --color-focus: #1873b9;
  --color-contrast-surface: #221613;
  --color-contrast-ink: #e7e5e4;
  --color-contrast-line: #4d4441;
  --color-contrast-accent: #2a8bd5;
  --overlay-scrim: linear-gradient(180deg, rgba(34, 22, 19, 0.35) 0%, rgba(34, 22, 19, 0.72) 55%, rgba(34, 22, 19, 0.92) 100%);
  --font-heading: "Songti SC", "Source Han Serif SC", "Noto Serif SC", SimSun, serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 11.0px;
  --text-sm: 14.7px;
  --text-base: 17px;
  --text-lg: 22.7px;
  --text-xl: 30.2px;
  --text-2xl: 40.3px;
  --text-3xl: 53.7px;
  --text-4xl: 71.5px;
  --text-display: clamp(37px, 7.6vw, 97px);
  --text-figure: clamp(31px, 5.5vw, 70px);
  --weight-heading: 607;
  --weight-body: 400;
  --leading-body: 1.8;
  --leading-heading: 1.23;
  --tracking-heading: 0.006em;
  --radius-sm: 1px;
  --radius-md: 2px;
  --radius-lg: 2px;
  --radius-pill: 2px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: none;
  --shadow-2: none;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1080px;
  --measure: 64ch;
  --gutter: 16px;
  --section-y: 81px;
  --section-y-lg: 113px;
}

/* ==========================================================================
   1. Reset
   ========================================================================== */

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

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

body {
  margin: 0;
  min-height: 100vh;
  background-color: var(--color-surface);
  background-image: radial-gradient(color-mix(in srgb, var(--color-ink) 7%, transparent) 0.5px, transparent 0.6px);
  background-size: 4px 4px;
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img,
svg,
video,
canvas {
  display: block;
  max-width: 100%;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

table {
  border-collapse: collapse;
  width: 100%;
}

#main-content {
  scroll-margin-top: var(--space-6);
}

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

/* ==========================================================================
   2. 基础排版
   ========================================================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--space-3);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }
h5,
h6 { font-size: var(--text-base); }

p {
  margin: 0 0 var(--space-3);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 100% 1px;
  transition: background-size 120ms linear, color 120ms linear;
}

a:hover {
  background-size: calc(100% + 4px) 2px;
}

strong { font-weight: 700; }

small {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

hr {
  border: 0;
  margin: var(--space-6) 0;
}

:where(a, button, summary, input, select, textarea, [tabindex]):focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   3. 布局容器与栅格
   ========================================================================== */

.wrap,
.header-inner,
.footer-inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--space-3);
  padding-right: var(--space-3);
}

.section {
  padding: var(--section-y) 0;
}

.section--lg {
  padding: var(--section-y-lg) 0;
}

.section--alt {
  background-color: var(--color-surface-alt);
}

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

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

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

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

.prose h2,
.prose h3 {
  margin-top: var(--space-6);
}

.rail {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-self: start;
}

.chapter-title {
  grid-column: 1 / -1;
  margin: 0 0 var(--space-6);
  padding-bottom: var(--space-3);
  border-bottom: var(--border-thin) dotted var(--color-line);
  font-size: var(--text-2xl);
}

.bleed-right {
  margin-right: calc(var(--space-6) * -1);
}

.bleed-left {
  margin-left: calc(var(--space-6) * -1);
}

/* ==========================================================================
   4. 印刷标签 / 分隔 / 引文
   ========================================================================== */

.stamp {
  display: inline-block;
  padding: 3px 8px 2px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  line-height: 1.35;
  white-space: nowrap;
}

.stamp--solid {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.stamp--on-dark {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.rule-dots {
  border-top: var(--border-thin) dotted var(--color-line);
}

.rule-double {
  height: 6px;
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.rule-ticks {
  height: 10px;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0 1px,
    transparent 1px 12px
  );
}

.callout {
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
}

.rail-note {
  padding: var(--space-3);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background-color: var(--color-highlight);
  color: var(--color-ink);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.rail-note > *:last-child {
  margin-bottom: 0;
}

.rail-note--paper {
  background-color: var(--color-primary-soft);
  border-left-color: var(--color-primary);
}

.pullquote {
  margin: var(--space-6) 0;
  padding: var(--space-4) 0;
  border-top: var(--border-thin) solid var(--color-primary);
  border-bottom: var(--border-thin) dotted var(--color-line);
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.45;
  color: var(--color-ink);
}

.pullquote cite {
  display: block;
  margin-top: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-style: normal;
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}

/* ==========================================================================
   5. 数字与深色带
   ========================================================================== */

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  margin-right: 8px;
}

.figure-num {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: var(--text-figure);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-primary);
}

.display {
  margin: 0;
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.band-dark {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.band-dark h1,
.band-dark h2,
.band-dark h3,
.band-dark h4 {
  color: var(--color-contrast-ink);
}

.band-dark p,
.band-dark li,
.band-dark span {
  color: var(--color-contrast-ink);
}

.band-dark a {
  color: var(--color-contrast-accent);
}

.band-dark .stamp {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-accent);
}

.band-dark .stamp--solid {
  border-color: var(--color-primary);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.band-dark .figure-num {
  color: var(--color-contrast-accent);
}

.band-dark .rule-dots,
.band-dark .rule-double {
  border-color: var(--color-contrast-line);
}

.band-dark .callout {
  border-left-color: var(--color-primary);
}

/* ==========================================================================
   6. 按钮
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 9px 18px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  background-color: transparent;
  background-image: none;
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.4;
  cursor: pointer;
  transition: background-color 120ms linear, color 120ms linear, border-color 120ms linear;
}

.btn:hover,
.btn:focus-visible {
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  background-image: none;
}

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

.btn--solid:hover,
.btn--solid:focus-visible {
  background-color: transparent;
  color: var(--color-primary);
}

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

.btn--accent:hover,
.btn--accent:focus-visible {
  background-color: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn--on-dark {
  border-color: var(--color-contrast-accent);
  color: var(--color-contrast-ink);
  background-color: transparent;
}

.btn--on-dark:hover,
.btn--on-dark:focus-visible {
  background-color: var(--color-contrast-accent);
  color: var(--color-contrast-surface);
}

/* ==========================================================================
   7. 面包屑
   ========================================================================== */

.breadcrumb {
  padding: var(--space-3) 0;
  border-bottom: var(--border-thin) dotted var(--color-line);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  min-width: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin: 0 var(--space-1);
  color: var(--color-line);
}

.breadcrumb a {
  color: var(--color-ink-soft);
}

.breadcrumb [aria-current="page"] {
  color: var(--color-ink);
}

/* ==========================================================================
   8. 头部
   ========================================================================== */

.site-header {
  position: relative;
  z-index: 20;
  background-color: var(--color-surface);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.header-rule {
  height: 4px;
  background-color: var(--color-primary);
}

.masthead {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 3fr) minmax(0, 3fr);
  grid-template-areas: "brand tagline meta";
  align-items: end;
  column-gap: var(--gutter);
  padding: var(--space-4) 0 var(--space-3);
}

.masthead__brand {
  grid-area: brand;
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--color-ink);
  background-image: none;
}

.masthead__brand:hover {
  background-size: 0 0;
}

.masthead__name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-heading);
  line-height: 1.1;
  letter-spacing: 0.05em;
  color: var(--color-ink);
}

.masthead__subject {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.masthead__tagline {
  grid-area: tagline;
  margin: 0 0 4px;
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-ink-soft);
}

.masthead__meta {
  grid-area: meta;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--space-2);
  text-align: right;
}

.masthead__service {
  font-size: var(--text-xs);
  line-height: 1.5;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
}

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

.nav-list {
  display: flex;
  flex-wrap: wrap;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list__item {
  display: flex;
}

.nav-list__item + .nav-list__item {
  border-left: var(--border-thin) dotted var(--color-line);
}

.nav-list a {
  display: flex;
  align-items: center;
  padding: 13px 18px;
  background-image: none;
  box-shadow: inset 0 -3px 0 transparent;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  transition: color 120ms linear, background-color 120ms linear, box-shadow 120ms linear;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background-size: 0 0;
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
  box-shadow: inset 0 -3px 0 color-mix(in srgb, var(--color-primary) 50%, transparent);
}

.nav-list a[aria-current="page"] {
  background-color: color-mix(in srgb, var(--color-primary-soft) 60%, transparent);
  color: var(--color-primary);
  box-shadow: inset 0 -3px 0 var(--color-primary);
}

.read-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 90;
  width: 0;
  height: 3px;
  background-color: var(--color-accent);
  pointer-events: none;
}

.nav-toggle {
  grid-area: toggle;
  display: none;
  align-items: center;
  gap: 10px;
  width: max-content;
  padding: 10px 14px;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  background-color: transparent;
  background-image: none;
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  letter-spacing: 0.14em;
  cursor: pointer;
  transition: color 120ms linear, border-color 120ms linear;
}

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

.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.nav-toggle__box {
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
  width: 16px;
  height: 11px;
}

.nav-toggle__box span {
  display: block;
  height: 1px;
  background-color: currentColor;
}

.skip-link {
  position: absolute;
  top: -80px;
  left: var(--space-2);
  z-index: 60;
  padding: 10px var(--space-2);
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  background-image: none;
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  transition: top 120ms linear;
}

.skip-link:focus {
  top: var(--space-2);
  background-size: 0 0;
  color: var(--color-primary-ink);
}

/* ==========================================================================
   9. 页脚
   ========================================================================== */

.site-footer {
  position: relative;
  margin-top: var(--section-y-lg);
  border-top: 4px solid var(--color-primary);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(color-mix(in srgb, var(--color-contrast-ink) 14%, transparent) 0.5px, transparent 0.6px);
  background-size: 3px 3px;
  opacity: 0.5;
  pointer-events: none;
}

.site-footer h1,
.site-footer h2,
.site-footer h3 {
  color: var(--color-contrast-ink);
}

.footer-inner {
  position: relative;
  z-index: 1;
}

.footer-upper {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 3fr) minmax(0, 3fr) minmax(0, 2fr);
  gap: var(--space-6) var(--space-3);
  padding: var(--section-y) 0 var(--space-8);
}

.footer-brand__name {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  letter-spacing: 0.08em;
  color: var(--color-contrast-ink);
}

.footer-brand__subject {
  margin: 0 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.footer-brand__tagline {
  margin: 0 0 var(--space-3);
  padding-left: var(--space-2);
  border-left: 3px solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 80%, transparent);
}

.footer-brand__stamp {
  margin: 0;
}

.footer-block__title {
  margin: 0 0 var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) dotted var(--color-contrast-line);
  font-size: var(--text-base);
  font-weight: var(--weight-heading);
  letter-spacing: 0.12em;
  color: var(--color-contrast-ink);
}

.footer-block--aside {
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
}

.footer-block__note {
  margin: 0 0 var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-links a {
  position: relative;
  display: inline-block;
  padding-left: 12px;
  background-image: none;
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  transition: color 120ms linear;
}

.footer-links a::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 3px;
  height: 0.95em;
  background-color: var(--color-contrast-line);
  transition: transform 120ms linear, background-color 120ms linear;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  background-size: 0 0;
  color: var(--color-primary);
}

.footer-links a:hover::before,
.footer-links a:focus-visible::before {
  transform: translateX(-2px);
  background-color: var(--color-primary);
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
}

.footer-cta {
  margin: var(--space-3) 0 0;
}

.footer-lower {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  padding: var(--space-4) 0 var(--space-6);
  border-top: var(--border-thin) dotted var(--color-contrast-line);
  font-size: var(--text-sm);
  color: color-mix(in srgb, var(--color-contrast-ink) 65%, transparent);
}

.footer-copy {
  margin: 0;
  letter-spacing: 0.06em;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-legal a {
  background-image: none;
  color: color-mix(in srgb, var(--color-contrast-ink) 78%, transparent);
  letter-spacing: 0.06em;
}

.footer-legal a:hover,
.footer-legal a:focus-visible {
  background-size: 0 0;
  color: var(--color-primary);
}

/* ==========================================================================
   10. 数据轨 / 折叠面板
   ========================================================================== */

.data-track {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(232px, 280px);
  gap: var(--gutter);
  overflow-x: auto;
  padding-bottom: var(--space-3);
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--color-accent) var(--color-line);
  scrollbar-width: thin;
}

.data-track > * {
  scroll-snap-align: start;
}

.data-track::-webkit-scrollbar {
  height: 6px;
}

.data-track::-webkit-scrollbar-track {
  background-color: var(--color-line);
}

.data-track::-webkit-scrollbar-thumb {
  background-color: var(--color-accent);
  border-radius: 0;
}

.track-scale {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
}

.track-scale::after {
  content: "";
  flex: 1 1 auto;
  height: 6px;
  background-image: repeating-linear-gradient(
    to right,
    var(--color-line) 0 1px,
    transparent 1px 12px
  );
}

.folds {
  border-top: var(--border-thin) solid var(--color-line);
}

.fold {
  border-bottom: var(--border-thin) dotted var(--color-line);
}

.fold > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-2) var(--space-1);
  list-style: none;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  transition: background-color 120ms linear, color 120ms linear;
}

.fold > summary::-webkit-details-marker {
  display: none;
}

.fold > summary::after {
  content: "＋";
  display: grid;
  place-items: center;
  flex: none;
  width: 22px;
  height: 22px;
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
  color: var(--color-primary);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  line-height: 1;
  transition: background-color 120ms linear, color 120ms linear;
}

.fold[open] > summary::after {
  content: "－";
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
}

.fold > summary:hover {
  background-color: var(--color-surface-deep);
}

.fold__body {
  padding: 0 var(--space-1) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.fold__body > *:last-child {
  margin-bottom: 0;
}

/* ==========================================================================
   11. 图片容器
   ========================================================================== */

.media {
  position: relative;
  display: block;
  overflow: hidden;
  background-color: var(--color-surface-deep);
  border-radius: var(--radius-md);
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--wide { aspect-ratio: 16 / 9; }
.media--plate { aspect-ratio: 4 / 5; }
.media--tall { aspect-ratio: 2 / 3; }
.media--square { aspect-ratio: 1 / 1; }
.media--band { aspect-ratio: 21 / 9; }

.media__scrim {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--overlay-scrim);
  pointer-events: none;
}

.media__caption {
  margin: var(--space-1) 0 0;
  font-size: var(--text-xs);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

.media__caption--overlay {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  margin: 0;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
}

/* ==========================================================================
   12. 响应式
   ========================================================================== */

@media (max-width: 1024px) {
  .journal {
    grid-template-columns: minmax(0, 9fr) minmax(0, 3fr);
    gap: var(--space-4) var(--space-3);
  }

  .footer-upper {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    row-gap: var(--space-6);
  }
}

@media (max-width: 900px) {
  .masthead {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "brand brand"
      "tagline toggle"
      "meta meta";
    align-items: center;
    row-gap: var(--space-3);
    padding-top: var(--space-4);
  }

  .masthead__meta {
    align-items: flex-start;
    text-align: left;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding-top: var(--space-2);
    border-top: var(--border-thin) dotted var(--color-line);
  }

  .nav-toggle {
    display: inline-flex;
    justify-self: end;
    align-self: center;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open] {
    display: block;
  }

  .nav-list {
    flex-direction: column;
  }

  .nav-list__item + .nav-list__item {
    border-left: 0;
    border-top: var(--border-thin) dotted var(--color-line);
  }

  .nav-list a {
    width: 100%;
    padding: 14px 4px;
    justify-content: space-between;
  }

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

  .chapter-title {
    grid-column: auto;
  }

  .rail {
    border-top: var(--border-thin) dotted var(--color-line);
    padding-top: var(--space-4);
  }

  .bleed-right,
  .bleed-left {
    margin-left: 0;
    margin-right: 0;
  }
}

@media (max-width: 640px) {
  .section {
    padding: var(--space-6) 0;
  }

  .section--lg {
    padding: var(--space-8) 0;
  }

  .footer-upper {
    grid-template-columns: minmax(0, 1fr);
    padding-top: var(--space-6);
    padding-bottom: var(--space-6);
  }

  .footer-block--aside {
    padding-left: var(--space-2);
  }

  .footer-lower {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-2);
  }

  .footer-legal {
    gap: var(--space-2);
  }

  .data-track {
    grid-auto-columns: minmax(200px, 76%);
  }
}

/* ==========================================================================
   13. 动效偏好与打印
   ========================================================================== */

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media print {
  body {
    background-image: none;
    color: #000;
  }

  .site-nav,
  .nav-toggle,
  .read-progress,
  .skip-link,
  .footer-cta {
    display: none !important;
  }

  .site-footer,
  .band-dark,
  .footer-brand__tagline,
  .footer-block--aside {
    background: none !important;
    color: #000 !important;
    border-color: #000 !important;
  }

  .site-footer *,
  .band-dark * {
    color: #000 !important;
  }

  a {
    background-image: none !important;
    color: #000 !important;
  }

  .media__scrim {
    display: none;
  }
}