:root {
  --color-surface: #fdfcfc;
  --color-surface-alt: #f5f3f3;
  --color-surface-deep: #e9e6e6;
  --color-ink: #584648;
  --color-ink-soft: #816a6c;
  --color-ink-muted: #8b7476;
  --color-line: #dfdbdc;
  --color-primary: #b34c57;
  --color-primary-ink: #ffffff;
  --color-primary-soft: #f3e3e5;
  --color-accent: #cc33ad;
  --color-accent-ink: #ffffff;
  --color-highlight: #f4d8ee;
  --color-focus: #cc24aa;
  --color-contrast-surface: #231819;
  --color-contrast-ink: #e7e4e4;
  --color-contrast-line: #4e4546;
  --color-contrast-accent: #d350b9;
  --overlay-scrim: linear-gradient(180deg, rgba(35, 24, 25, 0.35) 0%, rgba(35, 24, 25, 0.72) 55%, rgba(35, 24, 25, 0.92) 100%);
  --font-heading: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Hiragino Sans GB", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, Menlo, Consolas, monospace;
  --text-xs: 11.4px;
  --text-sm: 14.3px;
  --text-base: 16px;
  --text-lg: 20.0px;
  --text-xl: 25.0px;
  --text-2xl: 31.2px;
  --text-3xl: 39.1px;
  --text-4xl: 48.8px;
  --text-display: clamp(34px, 6.2vw, 80px);
  --text-figure: clamp(28px, 4.5vw, 58px);
  --weight-heading: 679;
  --weight-body: 400;
  --leading-body: 1.86;
  --leading-heading: 1.23;
  --tracking-heading: 0.007em;
  --radius-sm: 18px;
  --radius-md: 24px;
  --radius-lg: 29px;
  --radius-pill: 999px;
  --border-thin: 1px;
  --border-thick: 1px;
  --shadow-1: 0 6px 18px rgba(88, 70, 72, 0.08);
  --shadow-2: 0 18px 44px rgba(88, 70, 72, 0.14);
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-6: 48px;
  --space-8: 64px;
  --container: 1100px;
  --measure: 74ch;
  --gutter: 32px;
  --section-y: 94px;
  --section-y-lg: 132px;
}

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

html {
  -webkit-text-size-adjust: 100%;
  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);
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

h1, h2, h3, h4, h5, h6, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
ul, ol { padding: 0; list-style: none; }
img, svg, video, canvas { display: block; max-width: 100%; height: auto; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.16s ease-out;
}
a:hover { color: var(--color-accent); }

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; padding: 0; cursor: pointer; }

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

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

/* ============ 中文排版 ============ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
  text-wrap: balance;
}
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, li { word-break: break-word; }
p { max-width: var(--measure); }

.display {
  font-family: var(--font-heading);
  font-size: var(--text-display);
  font-weight: var(--weight-heading);
  line-height: 1.04;
  letter-spacing: -0.012em;
  color: var(--color-ink);
}

.eyebrow {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  max-width: none;
}

.lede {
  font-size: var(--text-lg);
  line-height: 1.72;
  color: var(--color-ink-soft);
  max-width: var(--measure);
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-2); }
.prose h2, .prose h3 { margin-top: var(--space-6); }
.prose ul, .prose ol { padding-left: var(--space-3); list-style: disc; }
.prose li + li { margin-top: var(--space-1); }
.prose a { text-decoration: underline; text-underline-offset: 3px; }

.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  letter-spacing: -0.01em;
}

.figure {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 0.92;
  color: var(--color-primary);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

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

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

.stack { display: flex; flex-direction: column; gap: var(--space-3); }
.cluster { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-2); }

/* ============ 分区与底色轮换 ============ */
.section { padding-block: var(--section-y); }
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background-color: var(--color-surface-alt); }
.section--soft { background-color: var(--color-primary-soft); }
.section--highlight { background-color: var(--color-highlight); }
.section--deep { background-color: var(--color-surface-deep); }

.section--score {
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
}
.section--score h2,
.section--score h3,
.section--score p,
.section--score li { color: var(--color-contrast-ink); }
.section--score a { color: var(--color-contrast-accent); }
.section--score .eyebrow { color: color-mix(in srgb, var(--color-contrast-ink) 60%, transparent); }

.band-slant {
  background-image: linear-gradient(102deg, var(--color-primary-soft) 0 55%, transparent 55.2%);
}
.band-slant--flip {
  background-image: linear-gradient(258deg, var(--color-highlight) 0 44%, transparent 44.2%);
}

/* ============ 编号 / 刻度分隔语言 ============ */
.section-head {
  display: grid;
  grid-template-columns: minmax(72px, auto) minmax(0, 1fr);
  align-items: start;
  gap: var(--space-3) var(--space-4);
  margin-bottom: var(--space-4);
}
.section-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  font-weight: 600;
  line-height: 0.86;
  color: var(--color-primary);
  max-width: none;
}
.section--score .section-num { color: var(--color-contrast-accent); }

.scale-rule {
  height: 10px;
  border: 0;
  margin: 0;
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-ink) 22%, transparent) 0 1px,
    transparent 1px 14px
  );
}
.scale-rule--soft {
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-ink-muted) 26%, transparent) 0 1px,
    transparent 1px 22px
  );
}
.section--score .scale-rule {
  background-image: repeating-linear-gradient(
    90deg,
    var(--color-contrast-line) 0 1px,
    transparent 1px 14px
  );
}

/* ============ 页面头部 / 面包屑 ============ */
.page-head { padding-block: var(--space-8) var(--space-4); }
.page-head .page-title { font-size: var(--text-3xl); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
  margin-bottom: var(--space-3);
}
.breadcrumb li { display: inline-flex; align-items: center; max-width: none; }
.breadcrumb a { color: var(--color-ink-soft); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb li + li::before {
  content: "/";
  margin-right: var(--space-1);
  color: color-mix(in srgb, var(--color-ink-muted) 55%, transparent);
}

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  min-height: 46px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  box-shadow: var(--shadow-1);
  transition: transform 0.18s ease-out, box-shadow 0.18s ease-out, background-color 0.18s ease-out, color 0.18s ease-out;
}
.btn:hover {
  color: var(--color-primary-ink);
  background-color: color-mix(in srgb, var(--color-primary) 82%, var(--color-ink));
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}
.btn--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.btn--accent:hover {
  color: var(--color-accent-ink);
  background-color: color-mix(in srgb, var(--color-accent) 84%, var(--color-ink));
}
.btn--ghost {
  background-color: transparent;
  color: var(--color-primary);
  border: var(--border-thin) solid color-mix(in srgb, var(--color-primary) 38%, transparent);
  box-shadow: none;
}
.btn--ghost:hover {
  color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
  border-color: color-mix(in srgb, var(--color-primary) 62%, transparent);
  box-shadow: none;
}

/* ============ 卡片 / 标签 / 统计 ============ */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-1);
  transition: transform 0.18s ease-out, box-shadow 0.18s ease-out;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-2); }
.card > * + * { margin-top: var(--space-2); }

.tag,
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  max-width: none;
}
.tag--accent { background-color: var(--color-accent); color: var(--color-accent-ink); }
.tag--quiet {
  background-color: transparent;
  color: var(--color-ink-muted);
  box-shadow: inset 0 0 0 var(--border-thin) color-mix(in srgb, var(--color-ink-muted) 28%, transparent);
}
.section--score .tag,
.section--score .chip {
  background-color: color-mix(in srgb, var(--color-contrast-ink) 12%, transparent);
  color: var(--color-contrast-ink);
}

.stat { display: flex; flex-direction: column; gap: 6px; }
.stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-2xl);
  font-weight: 600;
  line-height: 1.02;
  color: var(--color-primary);
}
.stat-label {
  font-size: var(--text-xs);
  letter-spacing: 0.1em;
  color: var(--color-ink-muted);
}
.section--score .stat-value { color: var(--color-contrast-accent); }
.section--score .stat-label { color: color-mix(in srgb, var(--color-contrast-ink) 62%, transparent); }

/* ============ 图片容器 ============ */
.media-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background-color: var(--color-surface-deep);
  aspect-ratio: 16 / 10;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.82) contrast(1.02);
}
.media-frame--wide { aspect-ratio: 21 / 9; }
.media-frame--tall { aspect-ratio: 3 / 4; }

.media-frame--overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--overlay-scrim);
  pointer-events: none;
}
.media-caption {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 2;
  padding: var(--space-3);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  line-height: 1.55;
  letter-spacing: 0.02em;
  max-width: none;
}
.media-caption .num { color: var(--color-contrast-accent); }

/* ============ 筛选 ============ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-deep);
}
.filter-chip {
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background-color 0.16s ease-out, color 0.16s ease-out;
}
.filter-chip:hover { color: var(--color-primary); background-color: color-mix(in srgb, var(--color-primary) 10%, transparent); }
.filter-chip[aria-pressed="true"] { background-color: var(--color-accent); color: var(--color-accent-ink); }
.filter-chip[aria-pressed="true"]:hover { color: var(--color-accent-ink); }

[data-filtered-out] { display: none !important; }

/* ============ 折叠 ============ */
.disclosure {
  background-color: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}
.disclosure + .disclosure { margin-top: var(--space-2); }
.disclosure summary {
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.disclosure summary::-webkit-details-marker { display: none; }
.disclosure summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-size: var(--text-base);
  line-height: 1;
}
.disclosure[open] summary { color: var(--color-primary); }
.disclosure[open] summary::before { content: "–"; }
.disclosure > p,
.disclosure > div {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

/* ============ 跳转链接 ============ */
.skip-link {
  position: fixed;
  top: var(--space-1);
  left: var(--space-1);
  z-index: 200;
  padding: 10px var(--space-2);
  border-radius: var(--radius-sm);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-sm);
  font-weight: 600;
  transform: translateY(-220%);
  transition: transform 0.18s ease-out;
}
.skip-link:hover,
.skip-link:focus {
  color: var(--color-contrast-ink);
  transform: translateY(0);
}

/* ============ header ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
}

.header-top {
  background-color: var(--color-primary-soft);
  color: var(--color-ink);
  overflow: hidden;
  max-height: 140px;
  transition: max-height 0.22s ease-out, opacity 0.22s ease-out;
}
.site-header[data-stuck] .header-top {
  max-height: 0;
  opacity: 0;
}
.header-top-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 6px var(--space-3);
  min-height: 38px;
  padding-block: 8px;
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
}
.header-brand-line {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: none;
  font-weight: 600;
  color: var(--color-primary);
}
.brand-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background-color: var(--color-accent);
}
.header-tagline {
  max-width: none;
  color: var(--color-ink-soft);
}

.header-main {
  position: relative;
  background-color: var(--color-surface);
  transition: box-shadow 0.2s ease-out;
}
.site-header[data-stuck] .header-main { box-shadow: var(--shadow-1); }
.header-main::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-ink) 20%, transparent) 0 1px,
    transparent 1px 14px
  );
  opacity: 0.7;
  pointer-events: none;
}

.header-main-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-height: 68px;
  padding-block: var(--space-2);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex: 0 0 auto;
  color: var(--color-ink);
}
.brand:hover { color: var(--color-ink); }
.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: calc(var(--radius-sm) * 0.78);
  background-color: var(--color-primary);
  color: var(--color-primary-ink);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.18; }
.brand-name {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  letter-spacing: 0.02em;
}
.brand-sub {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.primary-nav { margin-left: auto; }
.nav-list { display: flex; align-items: center; gap: 2px; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 13px;
  border-radius: var(--radius-pill);
  color: var(--color-ink-soft);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: background-color 0.16s ease-out, color 0.16s ease-out;
}
.nav-link::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
  opacity: 0;
  transform: scale(0.55);
  transition: opacity 0.16s ease-out, transform 0.16s ease-out;
}
.nav-link:hover {
  color: var(--color-primary);
  background-color: color-mix(in srgb, var(--color-primary) 9%, transparent);
}
.nav-link[aria-current="page"] {
  background-color: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 600;
}
.nav-link[aria-current="page"]::before { opacity: 1; transform: none; }

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  background-color: var(--color-surface-deep);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 600;
}
.nav-toggle-text { letter-spacing: 0.08em; }
.nav-toggle-bars {
  position: relative;
  display: block;
  width: 16px;
  height: 2px;
  background-color: currentColor;
  border-radius: var(--radius-pill);
}
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background-color: currentColor;
  border-radius: var(--radius-pill);
  transition: transform 0.18s ease-out, opacity 0.18s ease-out;
}
.nav-toggle-bars::before { top: -5px; }
.nav-toggle-bars::after { top: 5px; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars { background-color: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::before { transform: translateY(5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle-bars::after { transform: translateY(-5px) rotate(-45deg); }

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  z-index: 3;
  transform: scaleX(0);
  transform-origin: 0 50%;
  background-color: var(--color-accent);
  pointer-events: none;
}

/* ============ footer ============ */
.site-footer {
  background-color: var(--color-surface-alt);
  color: var(--color-ink);
}
.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background-image: repeating-linear-gradient(
    90deg,
    color-mix(in srgb, var(--color-ink) 16%, transparent) 0 1px,
    transparent 1px 14px
  );
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding-block: var(--space-4);
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  max-width: none;
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-heading);
  letter-spacing: 0.04em;
  color: var(--color-ink);
}
.footer-brand::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background-color: var(--color-primary);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px var(--space-3);
  font-size: var(--text-sm);
}
.footer-links a { color: var(--color-ink-soft); }
.footer-links a:hover { color: var(--color-primary); }
.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 10px;
  max-width: none;
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  color: var(--color-ink-muted);
}
.footer-meta span { display: inline-flex; align-items: center; }
.footer-meta span + span::before {
  content: "·";
  margin-right: 10px;
  color: color-mix(in srgb, var(--color-ink-muted) 55%, transparent);
}

/* ============ 回到顶部 ============ */
.to-top {
  position: fixed;
  right: var(--space-3);
  bottom: var(--space-3);
  z-index: 70;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: var(--radius-pill);
  background-color: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  font-size: var(--text-base);
  line-height: 1;
  box-shadow: var(--shadow-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.2s ease-out, transform 0.2s ease-out, visibility 0.2s ease-out;
}
.to-top:hover {
  color: var(--color-contrast-ink);
  background-color: color-mix(in srgb, var(--color-contrast-surface) 86%, var(--color-accent));
}
.to-top[data-visible] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* ============ 渐显 ============ */
[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.26s ease-out, transform 0.26s ease-out;
}
[data-js] [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1100px) {
  .nav-link { padding: 9px 10px; font-size: var(--text-sm); }
}

@media (max-width: 960px) {
  .nav-toggle { display: inline-flex; }
  .header-main-inner { flex-wrap: wrap; row-gap: var(--space-2); }
  .primary-nav {
    display: none;
    flex-basis: 100%;
    margin-left: 0;
  }
  .primary-nav[data-open] { display: block; }
  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding-top: var(--space-2);
  }
  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px var(--space-2);
    border-radius: var(--radius-sm);
    font-size: var(--text-base);
  }
  .section-head { grid-template-columns: minmax(56px, auto) minmax(0, 1fr); }
  .page-head { padding-block: var(--space-6) var(--space-2); }
}

@media (max-width: 900px) {
  .grid { gap: var(--space-3); }
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9 { grid-column: span 12; }
}

@media (max-width: 720px) {
  .container { padding-inline: var(--space-2); }
  .section { padding-block: var(--space-6); }
  .section--lg { padding-block: var(--space-8); }
  .header-tagline { display: none; }
  .footer-inner { justify-content: flex-start; }
  .footer-meta { font-size: var(--text-xs); }
  .to-top { right: var(--space-2); bottom: 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;
  }
  [data-js] [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
  .skip-link { transition: none; }
}