/* ============================================================
   安信入口 — /assets/site.css
   共享外壳：reset / 变量 / 中文排版 / 头尾 / 基础组件
   ============================================================ */

/* ---------- 1. RESET ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body, h1, h2, h3, h4, h5, p, figure, blockquote, dl, dd, ol, ul { margin: 0; }
ol, ul { list-style: none; padding: 0; }
button { background: none; border: 0; padding: 0; cursor: pointer; font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
img, svg, video { display: block; max-width: 100%; height: auto; }
table { border-collapse: collapse; width: 100%; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }

/* ---------- 2. 变量 ---------- */
:root {
  --ink: #101418;
  --paper: #F4F1EA;
  --paper-2: #FBF9F4;
  --blue: #1B4DD8;
  --orange: #E2571F;
  --teal: #4A6B70;
  --gold: #C79A3B;
  --slate: #2C3338;
  --gray-500: #8A9096;
  --gray-200: #C9CDD1;
  --pulse: #DCE5FF;
  --alert: #A8231C;

  --rail: 288px;
  --content-max: 1240px;
  --gutter: clamp(16px, 4vw, 48px);
  --measure: 34em;

  --mono: ui-monospace, "JetBrains Mono", "IBM Plex Mono", SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  --sans: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  --line: 1px solid var(--gray-200);
  --shadow-plate: 4px 4px 0 rgba(16, 20, 24, .06);
  --ease: cubic-bezier(.2, .7, .3, 1);
  --ax-scroll: 0%;
  --tone: var(--blue);
  --tone-soft: var(--pulse);
}

[data-tone="blue"]   { --tone: var(--blue);   --tone-soft: var(--pulse); }
[data-tone="orange"] { --tone: var(--orange); --tone-soft: #FBE3D8; }
[data-tone="teal"]   { --tone: var(--teal);   --tone-soft: #DDE6E6; }
[data-tone="gold"]   { --tone: var(--gold);   --tone-soft: #F1E6CC; }

/* ---------- 3. 中文排版 ---------- */
body {
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
h1, h2, h3, h4 { font-weight: 800; line-height: 1.18; letter-spacing: -.01em; }
h1 { font-size: clamp(28px, 4.4vw, 72px); }
h2 { font-size: clamp(23px, 3vw, 40px); }
h3 { font-size: clamp(19px, 1.6vw, 24px); }
h4 { font-size: 17px; }
.ax-mono, .ax-num, .ax-kicker, .ax-nav-num, .ax-meta-strip, .ax-card-num,
.ax-card-value, .ax-card-source, .ax-band-value, .ax-band-label, .ax-stat-value,
.ax-stat-label, .ax-toc-link, .ax-filter-btn, .ax-view-btn, .ax-copy, .ax-note,
.ax-footer-title, .ax-footer-line, .ax-footer-legal, .ax-footer-facts dt, .ax-crumb {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}
.ax-kicker {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gray-500);
  text-transform: uppercase;
}
.ax-prose { max-width: var(--measure); }
.ax-prose p + p { margin-top: 1em; }
.ax-prose a, .ax-note a, .ax-card-source a { color: var(--blue); border-bottom: 1px solid currentColor; }

/* ---------- 4. 布局容器 ---------- */
.ax-container {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
#main-content { display: block; min-height: 60vh; }

.ax-section { padding-block: clamp(40px, 6vw, 88px); border-top: var(--line); }
.ax-section-head { display: grid; gap: 10px; margin-bottom: clamp(20px, 3vw, 36px); }
.ax-section-title { font-size: clamp(22px, 2.6vw, 36px); }
.ax-grid { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); gap: clamp(16px, 2vw, 28px); }
.ax-col-3 { grid-column: span 3; }
.ax-col-4 { grid-column: span 4; }
.ax-col-5 { grid-column: span 5; }
.ax-col-6 { grid-column: span 6; }
.ax-col-7 { grid-column: span 7; }
.ax-col-8 { grid-column: span 8; }
.ax-col-9 { grid-column: span 9; }
.ax-col-12 { grid-column: span 12; }

.ax-plate {
  background: var(--paper-2);
  border: var(--line);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: 6px 6px 0 -1px var(--paper), 6px 6px 0 0 var(--gray-200);
}

/* ---------- 5. 按钮 ---------- */
.ax-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 18px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .06em;
  line-height: 1.2;
  text-align: center;
  border: 1px solid var(--ink);
  background: transparent;
  color: var(--ink);
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.ax-btn:hover { border-color: var(--blue); color: var(--blue); }
.ax-btn--primary { background: var(--blue); border-color: var(--blue); color: var(--paper); }
.ax-btn--primary:hover { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.ax-btn--ghost { background: transparent; border-color: var(--gray-200); color: var(--ink); }
.ax-btn--ghost:hover { border-color: var(--blue); color: var(--blue); background: var(--pulse); }
.ax-btn--block { width: 100%; }

/* ---------- 6. 头部：左侧框架导航 ---------- */
.ax-header {
  background-color: var(--paper);
  color: var(--ink);
  border-right: var(--line);
}
.ax-skip {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 120;
  transform: translateY(-180%);
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 10px 14px;
  border: 1px solid var(--ink);
  transition: transform .18s var(--ease);
}
.ax-skip:focus { transform: none; }

.ax-header-bar {
  position: relative;
  z-index: 80;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px var(--gutter);
  background-color: var(--paper);
  border-bottom: var(--line);
}
.ax-brand { display: flex; align-items: center; gap: 12px; }
.ax-brand-mark {
  flex: none;
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--ink);
  border-left: 4px solid var(--blue);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .06em;
}
.ax-brand-text { display: grid; gap: 1px; }
.ax-brand-name { font-size: 17px; font-weight: 800; letter-spacing: .02em; line-height: 1.25; }
.ax-brand-line { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--gray-500); }

.ax-nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 42px;
  padding: 9px 13px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}
.ax-nav-toggle::before { content: ""; width: 8px; height: 8px; background: var(--blue); }
.ax-nav-toggle:hover { border-color: var(--blue); color: var(--blue); }
.ax-header[data-open] .ax-nav-toggle::before { background: var(--orange); }
.ax-nav-toggle-close { display: none; }
.ax-header[data-open] .ax-nav-toggle-open { display: none; }
.ax-header[data-open] .ax-nav-toggle-close { display: inline; }

.ax-nav { display: flex; flex-direction: column; padding: 0; }
.ax-nav-note {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  line-height: 1.6;
  color: var(--gray-500);
  padding: 16px 22px;
  border-bottom: var(--line);
}
.ax-nav-list { display: flex; flex-direction: column; }
.ax-nav-item { display: block; }
.ax-nav-link {
  position: relative;
  display: grid;
  grid-template-columns: 34px 1fr;
  align-items: baseline;
  gap: 10px;
  padding: 12px 22px 12px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  transition: background-color .18s var(--ease), color .18s var(--ease);
}
.ax-nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--tone);
  transform: scaleY(0);
  transform-origin: center top;
  transition: transform .18s var(--ease);
}
.ax-nav-num { font-size: 11px; letter-spacing: .08em; color: var(--gray-500); }
.ax-nav-link:hover { background-color: var(--pulse); color: var(--blue); }
.ax-nav-link:hover::before,
.ax-nav-link:focus-visible::before { transform: scaleY(1); }
.ax-nav-link[aria-current="page"] { background-color: var(--pulse); color: var(--blue); }
.ax-nav-link[aria-current="page"]::before { transform: scaleY(1); }
.ax-nav-link[aria-current="page"] .ax-nav-num { color: var(--blue); }

.ax-nav-cta {
  margin-top: auto;
  display: grid;
  gap: 8px;
  padding: 20px 22px;
  border-top: var(--line);
}
.ax-meta-strip {
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--gray-500);
  padding: 0 22px 26px;
}
.ax-progress {
  position: absolute;
  background: var(--orange);
  z-index: 5;
  transition: width .1s linear, height .1s linear;
}

/* ---------- 7. 页脚：深色图版 ---------- */
.ax-footer {
  background-color: var(--slate);
  color: var(--paper);
  border-top: 4px solid var(--blue);
}
.ax-footer-inner {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 72px) var(--gutter) clamp(24px, 3vw, 36px);
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}
.ax-footer-mark { font-size: 22px; font-weight: 800; letter-spacing: .02em; }
.ax-footer-line { font-size: 12px; letter-spacing: .08em; color: var(--gray-200); margin-top: 4px; }
.ax-footer-note { font-size: 13px; line-height: 1.7; color: #B9BEC3; margin-top: 12px; max-width: 26em; }
.ax-footer-cols {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}
.ax-footer-title { font-size: 12px; font-weight: 600; letter-spacing: .08em; color: var(--gold); margin-bottom: 14px; }
.ax-footer-list { display: grid; gap: 8px; }
.ax-footer-link {
  display: inline-block;
  font-size: 14px;
  color: #DDE1E4;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.ax-footer-link:hover { color: var(--paper); border-bottom-color: var(--orange); }
.ax-footer-facts { display: grid; grid-template-columns: auto 1fr; gap: 8px 12px; font-size: 13px; }
.ax-footer-facts dt { font-size: 11px; letter-spacing: .06em; color: var(--gray-500); padding-top: 3px; }
.ax-footer-facts dd { color: #E7EAEC; word-break: break-word; }
.ax-footer-legal {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: 18px var(--gutter) 28px;
  border-top: 1px solid rgba(244, 241, 234, .18);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--gray-500);
}
.ax-footer :focus-visible { outline-color: var(--gold); }

/* ---------- 8. 基础组件 ---------- */
/* 面包屑 */
.ax-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--gray-500);
  border-bottom: var(--line);
}
.ax-crumb li { display: inline-flex; align-items: center; gap: 8px; }
.ax-crumb li + li::before { content: "/"; color: var(--gray-200); }
.ax-crumb a { border-bottom: 1px solid transparent; }
.ax-crumb a:hover { color: var(--blue); border-bottom-color: var(--blue); }
.ax-crumb [aria-current="page"] { color: var(--ink); }

/* 展签卡 */
.ax-card {
  position: relative;
  background: var(--paper-2);
  border: var(--line);
  border-top: 3px solid var(--tone);
  padding: 20px 22px 18px;
  box-shadow: var(--shadow-plate);
}
.ax-card-head { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 14px; }
.ax-card-num { font-size: 11px; letter-spacing: .08em; color: var(--tone); border: 1px solid var(--tone); padding: 2px 6px; }
.ax-card-cat { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--gray-500); }
.ax-card-value { font-size: clamp(26px, 3vw, 38px); font-weight: 600; line-height: 1.1; letter-spacing: .01em; }
.ax-card-unit { font-family: var(--mono); font-size: 12px; color: var(--gray-500); margin-left: 6px; }
.ax-card-source {
  display: block;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--gray-200);
  font-size: 11px;
  letter-spacing: .04em;
  line-height: 1.7;
  color: var(--gray-500);
}

/* 索引块 */
.ax-index { display: grid; border-top: var(--line); }
.ax-index-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 16px 4px;
  border-bottom: var(--line);
}
.ax-index-num { font-family: var(--mono); font-size: 12px; letter-spacing: .06em; color: var(--tone); font-variant-numeric: tabular-nums; }
.ax-index-body { display: grid; gap: 6px; }
.ax-index-title { font-size: 16px; font-weight: 700; }
.ax-index-desc { font-size: 14px; line-height: 1.7; color: #4C5359; max-width: 38em; }

/* 档案表 */
.ax-archive { display: block; }
.ax-table-wrap { overflow-x: auto; border: var(--line); background: var(--paper-2); }
.ax-table { min-width: 640px; font-size: 14px; }
.ax-table caption {
  caption-side: top;
  text-align: left;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--gray-500);
}
.ax-table th, .ax-table td { padding: 11px 14px; border-bottom: 1px solid var(--gray-200); text-align: left; vertical-align: top; }
.ax-table thead th {
  background: var(--slate);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .06em;
  white-space: nowrap;
  border-bottom: 0;
}
.ax-table tbody tr:nth-child(even) { background: #EFEBE2; }
.ax-table tbody tr:hover { background: var(--pulse); }
.ax-table tbody tr:last-child td { border-bottom: 0; }
.ax-table .ax-num-cell { font-family: var(--mono); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.ax-table tfoot td {
  background: #EFEBE2;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gray-500);
}
.ax-archive[data-view="cards"] .ax-table { min-width: 0; }
.ax-archive[data-view="cards"] .ax-table thead { display: none; }
.ax-archive[data-view="cards"] .ax-table,
.ax-archive[data-view="cards"] .ax-table tbody,
.ax-archive[data-view="cards"] .ax-table tr,
.ax-archive[data-view="cards"] .ax-table td { display: block; width: auto; }
.ax-archive[data-view="cards"] .ax-table tbody tr {
  background: var(--paper-2);
  border: var(--line);
  border-left: 3px solid var(--tone);
  padding: 12px 14px;
  margin-bottom: 12px;
}
.ax-archive[data-view="cards"] .ax-table td { border-bottom: 0; padding: 4px 0; }
.ax-archive[data-view="cards"] .ax-table .ax-num-cell { text-align: left; }

/* 数据带 */
.ax-band {
  background: var(--slate);
  color: var(--paper);
  border-top: 4px solid var(--blue);
  border-bottom: 4px solid var(--blue);
}
.ax-band-inner {
  max-width: var(--content-max);
  margin-inline: auto;
  padding: clamp(20px, 3vw, 34px) var(--gutter);
  display: grid;
  gap: clamp(18px, 3vw, 40px);
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
}
.ax-band-item { display: grid; gap: 6px; border-left: 1px solid rgba(244, 241, 234, .2); padding-left: 16px; }
.ax-band-item:first-child { border-left: 0; padding-left: 0; }
.ax-band-value { font-size: clamp(24px, 3.2vw, 40px); font-weight: 600; line-height: 1; letter-spacing: .01em; }
.ax-band-label { font-size: 11px; letter-spacing: .08em; color: var(--gray-200); }

/* 数值 / 徽标 / 注记 / 复制 */
.ax-stat { display: grid; gap: 6px; }
.ax-stat-value { font-size: clamp(22px, 2.4vw, 30px); font-weight: 600; line-height: 1.05; }
.ax-stat-label { font-size: 11px; letter-spacing: .08em; color: var(--gray-500); }
.ax-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  padding: 3px 8px;
  border: 1px solid var(--tone);
  background: var(--tone-soft);
  color: var(--ink);
}
.ax-note { font-size: 11px; letter-spacing: .04em; line-height: 1.7; color: var(--gray-500); }
.ax-copy {
  font-size: 11px;
  letter-spacing: .06em;
  padding: 5px 10px;
  border: 1px solid var(--gray-200);
  color: var(--gray-500);
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}
.ax-copy:hover { border-color: var(--blue); color: var(--blue); }
.ax-copy[data-copied] { border-color: var(--orange); color: var(--orange); background: #FBE3D8; }

/* 图例 */
.ax-legend { display: flex; flex-wrap: wrap; gap: 14px; font-family: var(--mono); font-size: 11px; letter-spacing: .06em; color: var(--gray-500); }
.ax-legend-item { display: inline-flex; align-items: center; gap: 6px; }
.ax-legend-swatch { width: 14px; height: 8px; background: var(--tone); border: 1px solid rgba(16, 20, 24, .25); }

/* 展开组 */
.ax-disclosure { border-top: var(--line); }
.ax-disclosure-trigger {
  width: 100%;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 16px 4px;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  transition: color .18s var(--ease);
}
.ax-disclosure-trigger:hover { color: var(--blue); }
.ax-disclosure-icon { font-family: var(--mono); font-size: 14px; color: var(--tone); transition: transform .18s var(--ease); }
.ax-disclosure-trigger[aria-expanded="true"] .ax-disclosure-icon { transform: rotate(90deg); }
.ax-disclosure-panel {
  padding: 0 4px 20px;
  font-size: 14px;
  line-height: 1.75;
  color: #4C5359;
  animation: ax-panel-in .18s var(--ease);
}
@keyframes ax-panel-in { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

/* 筛选条 / 视图切换 */
.ax-filterbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-block: 14px;
  border-top: var(--line);
  border-bottom: var(--line);
}
.ax-filter-label { font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--gray-500); margin-right: 4px; }
.ax-filter-btn {
  font-size: 12px;
  letter-spacing: .06em;
  padding: 7px 12px;
  border: 1px solid var(--gray-200);
  color: var(--ink);
  background: transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}
.ax-filter-btn:hover { border-color: var(--tone); color: var(--tone); }
.ax-filter-btn[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.ax-viewtoggle { display: inline-flex; border: 1px solid var(--gray-200); }
.ax-view-btn {
  font-size: 11px;
  letter-spacing: .06em;
  padding: 8px 12px;
  color: var(--gray-500);
  transition: color .18s var(--ease), background-color .18s var(--ease);
}
.ax-view-btn + .ax-view-btn { border-left: 1px solid var(--gray-200); }
.ax-view-btn:hover { color: var(--blue); }
.ax-view-btn[aria-pressed="true"] { background: var(--ink); color: var(--paper); }

/* 锚点目录 */
.ax-toc { display: flex; flex-wrap: wrap; gap: 6px; padding-block: 14px; border-bottom: var(--line); }
.ax-toc-link {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--gray-500);
  padding: 6px 10px;
  border: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease), background-color .18s var(--ease);
}
.ax-toc-link:hover { color: var(--blue); border-color: var(--gray-200); }
.ax-toc-link[aria-current="true"] { color: var(--paper); background: var(--blue); border-color: var(--blue); }

/* 图片容器（页面阶段放占位或实拍） */
.ax-figure { margin: 0; display: grid; gap: 8px; }
.ax-img {
  position: relative;
  display: block;
  overflow: hidden;
  border: var(--line);
  background-color: #EDE9E0;
  background-image: repeating-linear-gradient(135deg, rgba(74, 107, 112, .14) 0 6px, transparent 6px 14px);
}
.ax-img img, .ax-img > svg { width: 100%; height: 100%; object-fit: cover; filter: saturate(.92) contrast(1.04); }
.ax-img[data-ratio="16x9"] { aspect-ratio: 16 / 9; }
.ax-img[data-ratio="4x3"]  { aspect-ratio: 4 / 3; }
.ax-img[data-ratio="3x2"]  { aspect-ratio: 3 / 2; }
.ax-img[data-ratio="1x1"]  { aspect-ratio: 1 / 1; }
.ax-img[data-ratio="3x4"]  { aspect-ratio: 3 / 4; }
.ax-img-cap { font-family: var(--mono); font-size: 11px; letter-spacing: .04em; line-height: 1.7; color: var(--gray-500); }

/* ---------- 9. 动效 ---------- */
.ax-reveal { opacity: 0; transform: translateY(12px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.ax-reveal.ax-in { opacity: 1; transform: none; }

/* ---------- 10. 响应式 ---------- */
@media (max-width: 1024px) {
  .ax-col-3, .ax-col-4, .ax-col-5 { grid-column: span 6; }
  .ax-col-7, .ax-col-8, .ax-col-9 { grid-column: span 12; }
}

@media (max-width: 899.98px) {
  .ax-header {
    position: sticky;
    top: 0;
    z-index: 60;
    border-right: 0;
    border-bottom: var(--line);
  }
  .ax-header-bar { padding: 12px var(--gutter); }
  .ax-nav {
    position: fixed;
    inset: 0;
    z-index: 70;
    flex: none;
    background-color: var(--paper);
    padding: calc(76px + env(safe-area-inset-top, 0px)) var(--gutter) 40px;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    pointer-events: none;
    transition: opacity .2s var(--ease), transform .2s var(--ease), visibility .2s linear;
  }
  .ax-header[data-open] .ax-nav { opacity: 1; visibility: visible; transform: none; pointer-events: auto; }
  .ax-nav-note { padding: 0 0 16px; }
  .ax-nav-list { border-top: var(--line); }
  .ax-nav-link {
    grid-template-columns: 44px 1fr;
    font-size: 20px;
    padding: 16px 12px 16px 14px;
    border-bottom: var(--line);
  }
  .ax-nav-num { font-size: 12px; }
  .ax-nav-cta { margin-top: 0; padding: 24px 0 0; border-top: 0; }
  .ax-meta-strip { padding: 20px 0 0; }
  .ax-progress { left: 0; bottom: -1px; width: var(--ax-scroll); height: 3px; }
  html:has(.ax-header[data-open]) { overflow: hidden; }
}

@media (max-width: 640px) {
  .ax-grid > * { grid-column: span 12; }
  .ax-index-row { grid-template-columns: 1fr; gap: 6px; }
  .ax-footer-legal { flex-direction: column; }
}

@media (min-width: 900px) {
  .ax-header {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--rail);
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }
  .ax-header-bar { padding: 26px 22px 18px; }
  .ax-nav-toggle { display: none; }
  .ax-nav { flex: 1 1 auto; overflow-y: auto; }
  .ax-nav-note { padding: 18px 22px 16px; }
  .ax-nav-list { padding-top: 6px; }
  .ax-progress { top: 0; right: 0; width: 3px; height: var(--ax-scroll); }
  #main-content, .ax-footer { margin-left: var(--rail); }
}

@media (min-width: 1024px) {
  .ax-footer-inner { grid-template-columns: 1.05fr 2.1fr 1.15fr; gap: clamp(32px, 4vw, 64px); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .ax-reveal { opacity: 1; transform: none; }
  .ax-disclosure-panel { animation: none; }
}