:root {
  --color-surface: #efeeee;
  --color-surface-alt: #e7e5e5;
  --color-surface-deep: #dbd9d9;
  --color-ink: #4c3e3e;
  --color-ink-soft: #756161;
  --color-ink-muted: #8a7575;
  --color-line: #d2cece;
  --color-primary: #d0322f;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #ebd4d3;
  --color-accent: #dd2622;
  --color-accent-ink: #ffffff;
  --color-highlight: #eccac9;
  --color-focus: #d21713;
  --color-contrast-surface: #1c1010;
  --color-contrast-ink: #e7e4e4;
  --color-contrast-line: #493f3f;
  --color-contrast-accent: #e24441;
  --overlay-scrim: linear-gradient(180deg, rgba(28, 16, 16, 0.35) 0%, rgba(28, 16, 16, 0.72) 55%, rgba(28, 16, 16, 0.92) 100%);
  --font-heading: "Kaiti SC", STKaiti, KaiTi, "Songti SC", serif;
  --font-body: "Songti SC", "PingFang SC", "Microsoft YaHei", serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 12.2px;
  --text-sm: 15.2px;
  --text-base: 17px;
  --text-lg: 21.2px;
  --text-xl: 26.6px;
  --text-2xl: 33.2px;
  --text-3xl: 41.5px;
  --text-4xl: 51.9px;
  --text-display: clamp(41px, 8.4vw, 108px);
  --text-figure: clamp(34px, 6.1vw, 78px);
  --weight-heading: 546;
  --weight-body: 400;
  --leading-body: 2.02;
  --leading-heading: 1.29;
  --tracking-heading: 0.016em;
  --radius-sm: 1px;
  --radius-md: 1px;
  --radius-lg: 1px;
  --radius-pill: 1px;
  --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: 1060px;
  --measure: 64ch;
  --gutter: 16px;
  --section-y: 136px;
  --section-y-lg: 190px;
}

/* ============================================================
   1. reset
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 132px;
}
body, h1, h2, h3, h4, h5, p, ul, ol, li, figure, blockquote, dl, dd, table, th, td, fieldset { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; background: none; border: 0; }
a { color: inherit; text-decoration: none; }
table { width: 100%; border-collapse: collapse; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
::selection { background: var(--color-highlight); color: var(--color-ink); }

/* ============================================================
   2. 纸面 / 中文排版
   ============================================================ */
body {
  background-color: var(--color-surface);
  background-image:
    radial-gradient(rgba(76, 62, 62, 0.055) 1px, transparent 1.2px),
    radial-gradient(rgba(76, 62, 62, 0.035) 1px, transparent 1.2px);
  background-size: 4px 4px, 11px 11px;
  background-position: 0 0, 3px 5px;
  color: var(--color-ink-soft);
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: var(--weight-body);
  line-height: var(--leading-body);
  min-height: 100vh;
  overflow-x: hidden;
}
h1, h2, h3, h4, h5 {
  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); }
p { max-width: var(--measure); }
strong { font-weight: var(--weight-heading); color: var(--color-ink); }
hr { border: 0; border-top: var(--border-thin) solid var(--color-line); height: 0; margin: 0; }
body { text-rendering: optimizeLegibility; }

/* ============================================================
   3. 容器 / 栅格 / 章节节奏
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-3);
}
.site-main { display: block; padding-top: var(--space-8); }
.section { margin-top: var(--section-y); }
.section--lead { margin-top: var(--section-y-lg); }
.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
}
.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.stack--lg { display: flex; flex-direction: column; gap: var(--space-6); }

.section-head {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gutter);
  align-items: baseline;
  padding-bottom: var(--space-2);
  border-bottom: var(--border-thin) solid var(--color-line);
  margin-bottom: var(--space-6);
}
.section-eyebrow {
  grid-column: 1 / span 2;
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-ink-muted);
}
.section-title {
  grid-column: 3 / span 7;
  font-size: var(--text-2xl);
  color: var(--color-ink);
}
.section-note {
  grid-column: 10 / span 3;
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}
h1.hero-title {
  font-size: var(--text-display);
  line-height: 1.06;
  letter-spacing: 0.02em;
  max-width: 13ch;
  color: var(--color-ink);
}
.figure {
  display: block;
  font-family: var(--font-heading);
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-accent);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}
.hairline { height: 1px; background: var(--color-line); border: 0; margin: 0; }
.star-dots { display: flex; gap: 6px; align-items: center; }
.star-dots span {
  width: 4px;
  height: 4px;
  border-radius: 1px;
  background: var(--color-ink-muted);
  opacity: 0.7;
}
.star-dots span:first-child { background: var(--color-primary); opacity: 1; }

/* ============================================================
   4. 页头：台账行 + 悬浮胶囊导航
   ============================================================ */
.skip-link {
  position: absolute;
  left: var(--space-3);
  top: -80px;
  z-index: 120;
  padding: 10px var(--space-3);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  transition: top 0.2s ease-out;
}
.skip-link:focus { top: var(--space-2); }

.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: var(--color-surface);
  background: color-mix(in srgb, var(--color-surface) 90%, transparent);
  backdrop-filter: saturate(115%) blur(8px);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.header-shell {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding-block: var(--space-1) var(--space-2);
}
.utility-line {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  justify-content: flex-end;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
  max-width: none;
}
.utility-dot {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 1px;
  background: var(--color-primary);
  flex: 0 0 auto;
}

.capsule-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 56px;
  padding: 0 var(--space-2) 0 var(--space-3);
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-pill);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  min-width: 0;
}
.brand-mark {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 1px;
  background: var(--color-primary);
}
.brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.brand-link {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  transition: color 0.22s ease-out;
}
.brand-link:hover { color: var(--color-primary); }
.brand-sub {
  font-size: var(--text-xs);
  line-height: 1.2;
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}

.nav { display: flex; align-items: center; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  font-size: var(--text-sm);
  letter-spacing: 0.04em;
  color: var(--color-ink-soft);
  border-radius: var(--radius-sm);
  transition: color 0.22s ease-out, background-color 0.22s ease-out;
}
.nav-link::before {
  content: "";
  flex: 0 0 auto;
  width: 4px;
  height: 4px;
  border-radius: 1px;
  background: var(--color-primary);
  opacity: 0;
  transition: opacity 0.22s ease-out;
}
.nav-link:hover { color: var(--color-ink); background: var(--color-surface-alt); }
.nav-link:hover::before { opacity: 0.45; }
.nav-link[aria-current="page"] { color: var(--color-ink); background: var(--color-surface-alt); }
.nav-link[aria-current="page"]::before { opacity: 1; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: var(--space-1);
  min-height: 36px;
  padding: 0 var(--space-2);
  background: transparent;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.22s ease-out, color 0.22s ease-out;
}
.nav-toggle:hover { background: var(--color-surface-alt); color: var(--color-ink); }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 14px;
  height: 1px;
  background: currentColor;
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 14px;
  height: 1px;
  background: currentColor;
}
.nav-toggle-bars::before { top: -4px; }
.nav-toggle-bars::after { top: 4px; }
.nav-toggle-label { line-height: 1; }

.read-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  pointer-events: none;
}
.read-progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ============================================================
   5. 页脚：同色延续
   ============================================================ */
.site-footer {
  margin-top: var(--section-y);
  padding-block: var(--space-8) var(--space-6);
  border-top: var(--border-thin) solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-ink-soft);
}
.foot-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4) var(--gutter);
}
.foot-block { display: flex; flex-direction: column; gap: var(--space-2); }
.foot-block:nth-child(1) { grid-column: span 5; }
.foot-block:nth-child(2) { grid-column: span 4; }
.foot-block:nth-child(3) { grid-column: span 3; }
.foot-block + .foot-block {
  border-left: var(--border-thin) solid var(--color-line);
  padding-left: var(--space-3);
}
.foot-title {
  font-size: var(--text-lg);
  color: var(--color-ink);
  letter-spacing: 0.06em;
}
.foot-text {
  font-size: var(--text-sm);
  line-height: 1.95;
  color: var(--color-ink-soft);
  max-width: 32ch;
}
.foot-sign {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  color: var(--color-ink-muted);
  padding-left: var(--space-1);
  border-left: 2px solid var(--color-primary-soft);
  max-width: none;
}
.foot-list { display: flex; flex-direction: column; gap: var(--space-1); }
.foot-link {
  font-size: var(--text-sm);
  color: var(--color-ink);
  border-bottom: var(--border-thin) solid transparent;
  transition: color 0.22s ease-out, border-color 0.22s ease-out;
}
.foot-link:hover { color: var(--color-primary); border-bottom-color: var(--color-primary); }
.foot-meta {
  font-size: var(--text-xs);
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
}
.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
  font-size: var(--text-xs);
  color: var(--color-ink-muted);
}
.legal-line { max-width: none; letter-spacing: 0.06em; }
.legal-links { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.legal-links .foot-link { font-size: var(--text-xs); color: var(--color-ink-muted); }
.foot-copy { max-width: none; margin-left: auto; letter-spacing: 0.08em; }

/* ============================================================
   6. 通用组件
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: 44px;
  padding: 0 var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink);
  background: transparent;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color 0.22s ease-out, border-color 0.22s ease-out, color 0.22s ease-out;
}
.btn:hover { background: var(--color-surface-alt); border-color: var(--color-ink-muted); }
.btn--primary {
  color: var(--color-primary-ink);
  background: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--primary:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--quiet { border-color: transparent; color: var(--color-ink-soft); padding-inline: var(--space-2); }
.btn--quiet:hover { background: var(--color-surface-alt); border-color: var(--color-line); color: var(--color-ink); }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 2px var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border: var(--border-thin) solid var(--color-primary);
  border-radius: var(--radius-sm);
}
.badge::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 1px;
  background: currentColor;
}
.badge--muted {
  color: var(--color-ink-muted);
  background: var(--color-surface-deep);
  border-color: var(--color-line);
}
.badge--contrast {
  color: var(--color-contrast-ink);
  background: transparent;
  border-color: var(--color-contrast-line);
}
.badge--contrast::before { background: var(--color-contrast-accent); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.breadcrumb li { display: inline-flex; align-items: center; gap: 4px; }
.breadcrumb li::after { content: "／"; color: var(--color-line); }
.breadcrumb li:last-child::after { content: ""; }
.breadcrumb a { color: var(--color-ink-soft); transition: color 0.22s ease-out; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb [aria-current="page"] { color: var(--color-ink); }

.prose {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: var(--measure);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}
.prose h2 { font-size: var(--text-2xl); }
.prose h3 { font-size: var(--text-xl); }
.prose h2, .prose h3 { margin-top: var(--space-4); }
.prose ul, .prose ol { display: flex; flex-direction: column; gap: var(--space-1); }
.prose li { position: relative; padding-left: var(--space-3); }
.prose li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.95em;
  width: 8px;
  height: 1px;
  background: var(--color-ink-muted);
}
.prose blockquote {
  border-left: var(--border-thin) solid var(--color-primary);
  padding-left: var(--space-3);
  color: var(--color-ink);
}

/* 轨道卡片 */
.rail {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding-left: var(--space-4);
  border-left: var(--border-thin) solid var(--color-line);
}
.rail-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}
.rail-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-4) - 3px);
  top: 0.7em;
  width: 5px;
  height: 5px;
  background: var(--color-surface);
  border: var(--border-thin) solid var(--color-ink-muted);
  border-radius: 1px;
  transition: background-color 0.22s ease-out, border-color 0.22s ease-out;
}
.rail-item:hover::before { background: var(--color-primary); border-color: var(--color-primary); }
.rail-item[data-state="current"]::before { background: var(--color-primary); border-color: var(--color-primary); }
.rail-card { display: flex; flex-direction: column; gap: var(--space-1); }
.rail-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}
.rail-note { font-size: var(--text-sm); line-height: 1.9; color: var(--color-ink-soft); max-width: var(--measure); }
.rail-meta {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  font-variant-numeric: tabular-nums;
}

/* 索引网格 */
.index-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: var(--border-thin) solid var(--color-line);
  border-left: var(--border-thin) solid var(--color-line);
}
.index-cell {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  padding: var(--space-2);
  border-right: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  transition: background-color 0.22s ease-out;
}
.index-cell:hover { background: var(--color-surface-alt); }
.index-no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.index-label { color: var(--color-ink); line-height: 1.6; }

/* 档案表 */
.ledger-wrap { width: 100%; overflow-x: auto; }
.ledger { min-width: 560px; font-size: var(--text-sm); text-align: left; }
.ledger th {
  padding: var(--space-2);
  background: var(--color-surface-deep);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: var(--weight-heading);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  border-bottom: var(--border-thin) solid var(--color-line);
}
.ledger td {
  padding: var(--space-2);
  color: var(--color-ink-soft);
  line-height: 1.8;
  border-bottom: var(--border-thin) solid var(--color-line);
  vertical-align: top;
}
.ledger tbody tr:hover { background: var(--color-surface-alt); }
.ledger .col-no {
  font-family: var(--font-mono);
  color: var(--color-ink-muted);
  white-space: nowrap;
}

/* 折叠条目 */
details.expand {
  padding: var(--space-2) var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  transition: background-color 0.22s ease-out;
}
details.expand:last-of-type { border-bottom: var(--border-thin) solid var(--color-line); }
details.expand[open] { background: var(--color-surface-alt); }
details.expand > summary {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  cursor: pointer;
  list-style: none;
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink-soft);
  transition: color 0.22s ease-out;
}
details.expand > summary::-webkit-details-marker { display: none; }
details.expand > summary::after {
  content: "展开";
  margin-left: auto;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  color: var(--color-ink-muted);
}
details.expand[open] > summary { color: var(--color-ink); }
details.expand[open] > summary::after { content: "收起"; }
details.expand .expand-body { padding-top: var(--space-2); }

/* 筛选 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin-bottom: var(--space-4);
  padding-block: var(--space-2);
  border-top: var(--border-thin) solid var(--color-line);
  border-bottom: var(--border-thin) solid var(--color-line);
}
.filter-chip {
  min-height: 32px;
  padding: 0 var(--space-2);
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
  background: transparent;
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color 0.22s ease-out, background-color 0.22s ease-out, border-color 0.22s ease-out;
}
.filter-chip:hover { color: var(--color-ink); background: var(--color-surface-alt); }
.filter-chip[aria-pressed="true"] {
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-color: var(--color-primary);
}
.filter-status {
  margin-left: auto;
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-ink-muted);
}
.tag-row { display: flex; flex-wrap: wrap; gap: var(--space-1); }

/* ============================================================
   7. 媒体容器（页面阶段放置图片）
   ============================================================ */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 0;
  border-radius: 0;
  background: var(--color-surface-deep);
}
.media-frame img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }
.media-frame--tall { aspect-ratio: 3 / 4; }
.media-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--gutter); }
.media-caption {
  margin-top: var(--space-1);
  font-size: var(--text-xs);
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
  max-width: none;
}
.media-scrim {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-1);
  padding: var(--space-3);
  background: var(--overlay-scrim);
  color: var(--color-contrast-ink);
}
.media-scrim .media-scrim-title {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}
.media-scrim .media-scrim-note { font-size: var(--text-xs); letter-spacing: 0.06em; color: var(--color-contrast-ink); max-width: none; }

/* ============================================================
   8. 深墨带
   ============================================================ */
.contrast-band {
  padding-block: var(--space-8);
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  border-top: var(--border-thin) solid var(--color-contrast-line);
  border-bottom: var(--border-thin) solid var(--color-contrast-line);
}
.contrast-band h2, .contrast-band h3, .contrast-band h4 { color: var(--color-contrast-ink); }
.contrast-band p, .contrast-band li { color: var(--color-contrast-ink); }
.contrast-band a { color: var(--color-contrast-ink); border-bottom: var(--border-thin) solid var(--color-contrast-line); }
.contrast-band a:hover { border-bottom-color: var(--color-contrast-accent); }
.contrast-band hr { border-top: var(--border-thin) solid var(--color-contrast-line); }
.contrast-band .figure { color: var(--color-contrast-accent); }

/* ============================================================
   9. 显现（无 JS 时不隐藏）
   ============================================================ */
.has-reveal [data-reveal] { opacity: 0; }
.has-reveal [data-reveal][data-visible] { opacity: 1; }
[data-reveal] { transition: opacity 0.26s ease-out; }

/* ============================================================
   10. 响应式
   ============================================================ */
@media (max-width: 1024px) {
  .index-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .media-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 880px) {
  :root { --section-y: 96px; --section-y-lg: 120px; }
  .site-main { padding-top: var(--space-6); }
  .section-head { grid-template-columns: minmax(0, 1fr); gap: var(--space-1); margin-bottom: var(--space-4); }
  .section-eyebrow, .section-title, .section-note { grid-column: 1 / -1; }
  .foot-block:nth-child(1),
  .foot-block:nth-child(2),
  .foot-block:nth-child(3) { grid-column: span 12; }
  .foot-block + .foot-block {
    border-left: 0;
    padding-left: 0;
    padding-top: var(--space-3);
    border-top: var(--border-thin) solid var(--color-line);
  }
  .foot-copy { margin-left: 0; }
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    z-index: 70;
    padding: var(--space-1);
    background: var(--color-surface);
    border: var(--border-thin) solid var(--color-line);
    border-radius: var(--radius-sm);
  }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-link {
    justify-content: flex-start;
    padding: 12px var(--space-2);
    border-bottom: var(--border-thin) solid var(--color-line);
  }
  .nav-list li:last-child .nav-link { border-bottom: 0; }
  .capsule-nav[data-open] .nav { display: block; }
  .capsule-nav[data-open] { background: var(--color-surface); }
  .ledger { min-width: 520px; }
}
@media (max-width: 720px) {
  .utility-line { justify-content: flex-start; letter-spacing: 0.03em; }
  .brand-sub { display: none; }
  .capsule-nav { padding-left: var(--space-2); }
  .index-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .media-grid { grid-template-columns: minmax(0, 1fr); }
  .foot-legal { gap: var(--space-1) var(--space-3); }
  .figure { letter-spacing: 0; }
}
@media (max-width: 420px) {
  .container { padding-inline: var(--space-2); }
  .brand-link { font-size: var(--text-base); }
  .nav-toggle-label { display: none; }
  .index-grid { grid-template-columns: minmax(0, 1fr); }
}

/* ============================================================
   11. 可访问性 / 减弱动效
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
  }
  .has-reveal [data-reveal] { opacity: 1 !important; }
  .read-progress-bar { transition: none !important; }
}