/* Hallmark · macrostructure: Catalogue · H6 hero knobs: image=16/7, caption=dialogue-overlay, text=overlaid
 * theme: custom · vibe: "雾白旅馆、樱粉对白、夏空、橙色行动" · paper: oklch(99% 0.006 350) · accent: oklch(75% 0.175 63)
 * display: Bricolage Grotesque + Noto Sans SC · body: Noto Sans SC · axes: light / geometric-sans / warm
 * enrichment: E8 real game still · nav: N12 banner + retract · footer: Ft4 dense typographic
 * studied: no · context: explicit · v1.1.0 · pre-emit critique: P5 H5 E4 S5 R4 V5
 * contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (34, 49, 50–57) · icons: pass (30)
 */
@import url("../../tokens.css");

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  min-width: 20rem;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  padding-block-end: 5.5rem;
}
body.dialog-open { overflow: clip; }
img, video { display: block; max-width: 100%; }
img { height: auto; }
a { color: inherit; text-decoration-thickness: var(--rule-hair); text-underline-offset: 0.22em; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: var(--color-clear); }
:focus { outline: none; }
:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 3px; }
h1, h2, h3 {
  margin: 0;
  font-family: var(--font-display);
  font-style: normal;
  line-height: 1.08;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
  min-width: 0;
}
p, ul, ol, dl { margin: 0; }
ul, ol { padding-inline-start: 1.25rem; }
.skip-link {
  position: fixed;
  inset-block-start: var(--space-xs);
  inset-inline-start: var(--space-xs);
  z-index: var(--z-tooltip);
  transform: translateY(-160%);
  background: var(--color-nav);
  color: var(--color-nav-ink);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-xs);
}
.skip-link:focus { transform: none; }
.shell { width: min(74rem, 100%); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 3rem); }
.section { padding-block: var(--space-3xl); }
.section--tight { padding-block: var(--space-2xl); }
.section--pink { background: var(--color-paper-2); color: var(--color-ink); }
.section--blue { background: var(--color-paper-blue); color: var(--color-ink); }
.section--ink { background: var(--color-nav); color: var(--color-nav-ink); }
.section-head { display: grid; gap: var(--space-md); margin-block-end: var(--space-xl); max-width: 52rem; }
.section-head h2 { font-size: clamp(2rem, 4vw, var(--text-3xl)); }
.section-head p { max-width: 65ch; color: var(--color-ink-2); font-size: var(--text-md); }
.section--ink .section-head p { color: var(--color-nav-ink); }
.mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--color-muted); }
.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; }

.site-nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-sticky-nav);
  transform: translateY(0);
  transition: transform var(--dur-long) var(--ease-out);
}
.site-nav.is-compact { transform: translateY(calc(var(--banner-height) * -1)); }
.site-nav.is-dismissed { transform: none; }
.promo-banner {
  --banner-height: 2.5rem;
  height: var(--banner-height);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding-inline: 3.25rem;
  overflow: hidden;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font-size: var(--text-sm);
  font-weight: 700;
  white-space: nowrap;
}
.promo-banner a { text-decoration: underline; }
.promo-close {
  position: absolute;
  inset-block-start: 0;
  inset-inline-end: var(--space-xs);
  inline-size: 2.5rem;
  block-size: 2.5rem;
  border: 0;
  background: var(--color-clear);
  color: var(--color-accent-ink);
  cursor: pointer;
  font-size: var(--text-lg);
}
.site-nav.is-dismissed .promo-banner { display: none; }
.nav-bar { background: var(--color-nav); color: var(--color-nav-ink); border-block-end: var(--rule-strong) solid var(--color-nav-2); }
.nav-inner { min-height: 4rem; display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); }
.wordmark { display: inline-flex; align-items: center; gap: var(--space-xs); font-family: var(--font-display); font-weight: 800; text-decoration: none; white-space: nowrap; }
.wordmark-mark { inline-size: 1.75rem; block-size: 1.75rem; border: var(--rule-strong) solid var(--color-accent); border-radius: 50% 50% 45% 55%; display: grid; place-items: center; color: var(--color-accent); font-size: var(--text-sm); }
.nav-links { display: none; align-items: center; gap: var(--space-lg); }
.nav-links a { min-height: 44px; display: inline-flex; align-items: center; text-decoration: none; white-space: nowrap; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--color-accent); }
.nav-actions { display: flex; align-items: center; gap: var(--space-xs); }
.menu-toggle {
  inline-size: 2.75rem;
  block-size: 2.75rem;
  border: var(--rule-hair) solid var(--color-nav-ink);
  border-radius: var(--radius-xs);
  background: var(--color-clear);
  color: var(--color-nav-ink);
  cursor: pointer;
  white-space: nowrap;
}
.mobile-menu { display: none; background: var(--color-nav); color: var(--color-nav-ink); border-block-start: var(--rule-hair) solid var(--color-nav-2); padding: var(--space-sm) clamp(1rem, 4vw, 3rem) var(--space-lg); }
.mobile-menu.is-open { display: grid; }
.mobile-menu a { min-height: 44px; display: flex; align-items: center; text-decoration: none; border-block-end: var(--rule-hair) solid var(--color-nav-2); white-space: nowrap; }

.btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  border: var(--rule-strong) solid var(--color-ink);
  border-radius: var(--radius-xs);
  padding: var(--space-sm) var(--space-lg);
  background: var(--color-paper);
  color: var(--color-ink);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out);
  line-height: 1;
}
.btn-primary { background: var(--color-accent); color: var(--color-accent-ink); border-color: var(--color-accent-deep); }
.btn-primary::after {
  content: "";
  position: absolute;
  inset: -40% auto -40% -35%;
  inline-size: 24%;
  background: var(--color-paper);
  opacity: 0.34;
  transform: skewX(-18deg) translateX(-260%);
  animation: cta-sheen 4.8s var(--ease-in-out) infinite;
  pointer-events: none;
}
.btn-dark { background: var(--color-nav); color: var(--color-nav-ink); border-color: var(--color-nav); }
.btn:active { transform: translateY(1px); }
.btn[aria-disabled="true"], .btn:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }
.btn[data-state="loading"], .btn.is-loading { cursor: wait; }
.btn[data-state="loading"]::before, .btn.is-loading::before { content: ""; inline-size: 1rem; block-size: 1rem; border: var(--rule-strong) solid currentColor; border-inline-end-color: var(--color-clear); border-radius: 50%; animation: spin 1s linear infinite; }
.btn[data-state="error"], .btn.is-error { border-color: var(--color-error); color: var(--color-error); }
.btn[data-state="success"], .btn.is-success { border-color: var(--color-success); color: var(--color-success); }
:is(button, a, [role="button"])[data-state="loading"] { cursor: wait; opacity: 0.72; }
:is(button, a, [role="button"])[data-state="error"] { outline: var(--rule-strong) solid var(--color-error); outline-offset: var(--space-2xs); }
:is(button, a, [role="button"])[data-state="success"] { outline: var(--rule-strong) solid var(--color-success); outline-offset: var(--space-2xs); }
:is(button, [role="button"]):disabled, :is(button, [role="button"])[aria-disabled="true"] { opacity: 0.5; cursor: not-allowed; pointer-events: none; }
.site-nav :focus-visible, .footer :focus-visible { outline-color: var(--color-paper); }
@keyframes cta-sheen { 0%, 72% { transform: skewX(-18deg) translateX(-260%); } 88%, 100% { transform: skewX(-18deg) translateX(720%); } }
@keyframes spin { to { transform: rotate(360deg); } }

.hero {
  min-height: clamp(34rem, 78dvh, 49rem);
  position: relative;
  display: grid;
  align-items: end;
  padding-block: 7rem 9.25rem;
  color: var(--color-nav-ink);
  background: var(--color-nav);
  isolation: isolate;
}
.hero-media { position: absolute; inset: 0; z-index: -2; inline-size: 100%; block-size: 100%; object-fit: cover; object-position: 50% 48%; }
.hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, var(--color-overlay), var(--color-overlay-soft)); }
.hero-inner { display: grid; gap: var(--space-lg); align-items: end; }
.hero-copy { max-width: 56rem; display: grid; gap: var(--space-md); animation: hero-in var(--dur-long) var(--ease-out) both; }
.hero-tags, .tag-row { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.tag { display: inline-flex; align-items: center; min-height: 2rem; padding-inline: var(--space-sm); border: var(--rule-hair) solid currentColor; border-radius: 999px; font-size: var(--text-sm); white-space: nowrap; }
.hero h1 { font-size: var(--text-display-small); max-width: 18ch; }
.hero h1 span { display: block; font-size: 0.48em; letter-spacing: 0; margin-block-start: var(--space-xs); }
.hero-subtitle { max-width: 58ch; font-size: var(--text-md); }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.dialogue-box {
  max-width: 46rem;
  background: var(--color-paper);
  color: var(--color-ink);
  border: var(--rule-strong) solid var(--color-ink);
  border-radius: var(--radius-sm);
  padding: var(--space-md) var(--space-lg);
  box-shadow: 0 8px 24px var(--color-shadow);
}
.dialogue-speaker { font-weight: 800; color: var(--color-red); }
.dialogue-box p + p { margin-block-start: var(--space-xs); }
@keyframes hero-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

.facts-strip { position: relative; z-index: var(--z-raised); margin-block-start: calc(var(--space-lg) * -1); }
.facts-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); background: var(--color-paper); border: var(--rule-strong) solid var(--color-ink); }
.fact { min-width: 0; padding: var(--space-md); border-inline-end: var(--rule-hair) solid var(--color-rule); border-block-end: var(--rule-hair) solid var(--color-rule); }
.fact-value { display: block; font-family: var(--font-display); font-size: var(--text-md); font-weight: 800; overflow-wrap: anywhere; }
.fact-label { display: block; color: var(--color-muted); font-size: var(--text-sm); margin-block-start: var(--space-2xs); }

.story-layout { display: grid; gap: var(--space-xl); }
.story-copy { display: grid; gap: var(--space-md); max-width: 68ch; font-size: var(--text-md); }
.story-note { align-self: end; border-block: var(--rule-strong) solid var(--color-ink); padding-block: var(--space-lg); font-weight: 700; }
.feature-list { display: grid; grid-template-columns: minmax(0, 1fr); border-block-start: var(--rule-strong) solid var(--color-ink); }
.feature-item { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-md); padding-block: var(--space-lg); border-block-end: var(--rule-hair) solid var(--color-rule); }
.feature-index { font-family: var(--font-mono); color: var(--color-red); font-weight: 700; }
.feature-item h3 { font-size: var(--text-lg); margin-block-end: var(--space-xs); }
.feature-item p { color: var(--color-ink-2); max-width: 62ch; }

.shop-band { background: var(--color-nav); color: var(--color-nav-ink); }
.shop-toolbar { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: var(--space-lg); margin-block-end: var(--space-xl); }
.shop-toolbar h2 { font-size: clamp(2rem, 4vw, var(--text-3xl)); }
.shop-toolbar p { max-width: 48ch; }
.product-grid, .gallery-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
.product { min-width: 0; display: grid; gap: var(--space-sm); position: relative; }
.product-media, .gallery-item {
  position: relative;
  display: block;
  inline-size: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: var(--rule-hair) solid var(--color-rule);
  background: var(--color-paper-2);
  color: var(--color-ink);
  padding: 0;
  cursor: zoom-in;
}
.product-media img, .gallery-item img { inline-size: 100%; block-size: 100%; object-fit: cover; transition: transform var(--dur-long) var(--ease-out), opacity var(--dur-short) var(--ease-out); }
.product-meta { display: flex; justify-content: space-between; gap: var(--space-md); align-items: baseline; }
.product-meta h3 { font-family: var(--font-body); font-size: var(--text-base); letter-spacing: 0; }
.product-meta span { color: var(--color-accent); font-size: var(--text-sm); white-space: nowrap; }
.discount-corner { position: absolute; inset-block-start: var(--space-sm); inset-inline-start: var(--space-sm); background: var(--color-red); color: var(--color-red-ink); padding: var(--space-2xs) var(--space-xs); font-size: var(--text-xs); font-weight: 800; }

.media-stage { display: grid; gap: var(--space-md); }
.media-stage figure { margin: 0; position: relative; border: var(--rule-strong) solid var(--color-ink); }
.media-stage img { inline-size: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.play-stamp { position: absolute; inset-inline-start: var(--space-md); inset-block-end: var(--space-md); background: var(--color-paper); color: var(--color-ink); border: var(--rule-strong) solid var(--color-ink); padding: var(--space-xs) var(--space-sm); font-weight: 800; }
.media-caption { font-size: var(--text-sm); color: var(--color-muted); }

.download-panel { display: grid; gap: var(--space-xl); border: var(--rule-strong) solid var(--color-ink); padding: clamp(1.25rem, 4vw, 3rem); background: var(--color-paper); color: var(--color-ink); }
.download-panel h2 { font-size: clamp(2.1rem, 5vw, var(--text-4xl)); }
.download-meta { display: flex; flex-wrap: wrap; gap: var(--space-xs); }
.download-button { width: min(100%, 30rem); font-size: var(--text-md); padding-block: var(--space-md); }
.trust-list { display: grid; gap: var(--space-sm); list-style: none; padding: 0; }
.trust-list li { display: flex; gap: var(--space-sm); align-items: flex-start; }
.trust-list li::before { content: ""; flex: 0 0 auto; inline-size: 0.65rem; block-size: 0.65rem; margin-block-start: 0.45em; background: var(--color-blue); border-radius: 50%; }

.timeline { display: grid; gap: 0; border-block-start: var(--rule-strong) solid var(--color-ink); }
.timeline details, .faq details { border-block-end: var(--rule-hair) solid var(--color-rule); }
.timeline summary, .faq summary { min-height: 4rem; display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: var(--space-md); cursor: pointer; list-style: none; font-weight: 800; }
.timeline summary::-webkit-details-marker, .faq summary::-webkit-details-marker { display: none; }
.timeline summary::after, .faq summary::after { content: "+"; font-family: var(--font-mono); font-size: var(--text-lg); }
.timeline details[open] summary::after, .faq details[open] summary::after { content: "−"; }
.timeline-body, .faq-answer { padding-block: 0 var(--space-lg); max-width: 68ch; color: var(--color-ink-2); }
.timeline-date { font-family: var(--font-mono); color: var(--color-red); font-size: var(--text-sm); }

.audience-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
.audience-card { border-block-start: var(--rule-strong) solid var(--color-ink); padding-block-start: var(--space-lg); }
.audience-card h3 { font-size: var(--text-lg); margin-block-end: var(--space-sm); }
.audience-card p { color: var(--color-ink-2); }
.source-count { display: inline-flex; gap: var(--space-xs); align-items: baseline; margin-block-start: var(--space-md); font-variant-numeric: tabular-nums; }
.source-count strong { font-size: var(--text-xl); }

.faq { display: grid; gap: 0; border-block-start: var(--rule-strong) solid var(--color-ink); }
.faq summary { font-size: var(--text-md); }

.final-cta { padding-block: var(--space-4xl); background: var(--color-paper-3); color: var(--color-ink); }
.final-cta-inner { display: grid; gap: var(--space-lg); max-width: 54rem; }
.final-cta h2 { font-size: var(--text-display-small); }

.footer { background: var(--color-nav); color: var(--color-nav-ink); padding-block: var(--space-2xl) 7rem; }
.footer-mark { font-family: var(--font-display); font-size: var(--text-2xl); font-weight: 800; margin-block-end: var(--space-lg); }
.footer-copy { max-width: 76ch; font-family: var(--font-mono); font-size: var(--text-sm); line-height: 1.8; }
.footer-links { display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-lg); margin-block: var(--space-lg); }
.footer-links a { white-space: nowrap; }
.footer-small { font-size: var(--text-xs); color: var(--color-nav-ink); opacity: 0.8; }

.sticky-cta {
  position: fixed;
  inset: auto 0 0;
  z-index: var(--z-sticky-action);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-sm) max(var(--space-md), env(safe-area-inset-right)) max(var(--space-sm), env(safe-area-inset-bottom)) max(var(--space-md), env(safe-area-inset-left));
  background: var(--color-paper);
  color: var(--color-ink);
  border-block-start: var(--rule-strong) solid var(--color-ink);
}
.sticky-cta-copy { display: none; min-width: 0; }
.sticky-cta-copy strong, .sticky-cta-copy span { display: block; }
.sticky-cta-copy span { color: var(--color-muted); font-size: var(--text-sm); }
.back-top {
  position: fixed;
  inset-inline-end: var(--space-md);
  inset-block-end: 5.25rem;
  z-index: var(--z-sticky-action);
  min-height: 44px;
  padding-inline: var(--space-md);
  border: var(--rule-hair) solid var(--color-ink);
  border-radius: var(--radius-xs);
  background: var(--color-paper);
  color: var(--color-ink);
  cursor: pointer;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: opacity var(--dur-short) var(--ease-out), transform var(--dur-short) var(--ease-out);
}
.back-top.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.back-top:active { transform: translateY(1px); }
.promo-banner a, .promo-close, .nav-links a, .menu-toggle, .filter-tab, .back-top { line-height: 1; }
.promo-close:active, .menu-toggle:active, .filter-tab:active, .lightbox-close:active, .lightbox-prev:active, .lightbox-next:active { transform: translateY(1px); }
.product-media:active img, .gallery-item:active img { transform: scale(0.99); }

.page-hero { padding-block: 9rem var(--space-2xl); background: var(--color-paper-3); color: var(--color-ink); border-block-end: var(--rule-strong) solid var(--color-ink); }
.page-hero-inner { display: grid; gap: var(--space-md); max-width: 62rem; }
.page-hero h1 { font-size: var(--text-display-small); }
.page-hero p { font-size: var(--text-md); max-width: 62ch; }
.breadcrumbs { display: flex; flex-wrap: wrap; gap: var(--space-xs); font-size: var(--text-sm); }
.breadcrumbs a { white-space: nowrap; }

.filter-tabs { display: flex; flex-wrap: wrap; gap: var(--space-xs); margin-block-end: var(--space-xl); }
.filter-tab { min-height: 44px; border: var(--rule-hair) solid var(--color-ink); border-radius: 999px; padding-inline: var(--space-md); background: var(--color-paper); color: var(--color-ink); cursor: pointer; white-space: nowrap; }
.filter-tab[aria-pressed="true"] { background: var(--color-nav); color: var(--color-nav-ink); }
.gallery-item[hidden] { display: none; }
.gallery-item figcaption { position: absolute; inset: auto 0 0; padding: var(--space-sm); background: var(--color-overlay); color: var(--color-nav-ink); text-align: start; }
.gallery-empty { display: none; padding: var(--space-xl); border: var(--rule-hair) solid var(--color-rule); }
.gallery-empty.is-visible { display: block; }

.lightbox {
  position: fixed;
  inset: 0;
  margin: auto;
  inline-size: min(92%, 76rem);
  max-block-size: 88dvh;
  padding: 0;
  border: var(--rule-strong) solid var(--color-nav-ink);
  border-radius: var(--radius-sm);
  background: var(--color-nav);
  color: var(--color-nav-ink);
}
.lightbox::backdrop { background: var(--color-overlay); }
.lightbox[open] { animation: modal-in var(--dur-long) var(--ease-out); }
.lightbox-frame { display: grid; grid-template-columns: minmax(0, 1fr); }
.lightbox img { inline-size: 100%; max-block-size: 76dvh; object-fit: contain; background: var(--color-nav); }
.lightbox-caption { padding: var(--space-sm) 4rem var(--space-sm) var(--space-md); }
.lightbox-close, .lightbox-prev, .lightbox-next { position: absolute; inline-size: 2.75rem; block-size: 2.75rem; border: var(--rule-hair) solid var(--color-nav-ink); background: var(--color-nav); color: var(--color-nav-ink); cursor: pointer; }
.lightbox-close { inset-block-start: var(--space-sm); inset-inline-end: var(--space-sm); }
.lightbox-prev { inset-inline-start: var(--space-sm); inset-block-start: 50%; }
.lightbox-next { inset-inline-end: var(--space-sm); inset-block-start: 50%; }
@keyframes modal-in { from { opacity: 0; transform: scale(0.98); } to { opacity: 1; transform: none; } }

.platform-grid, .requirements-grid, .guide-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-lg); }
.platform-card { border: var(--rule-strong) solid var(--color-ink); padding: var(--space-lg); display: grid; gap: var(--space-md); align-content: start; }
.platform-card.recommended { background: var(--color-paper-3); color: var(--color-ink); }
.platform-badge { inline-size: fit-content; border: var(--rule-hair) solid var(--color-ink); padding: var(--space-2xs) var(--space-xs); font-size: var(--text-xs); font-weight: 800; }
.requirements-card { border-block-start: var(--rule-strong) solid var(--color-ink); padding-block-start: var(--space-lg); }
.requirements-card h3 { font-size: var(--text-lg); margin-block-end: var(--space-md); }
.spec-list { display: grid; gap: 0; }
.spec-list div { display: grid; gap: var(--space-2xs); padding-block: var(--space-sm); border-block-end: var(--rule-hair) solid var(--color-rule); }
.spec-list dt { color: var(--color-muted); font-size: var(--text-sm); }
.spec-list dd { margin: 0; font-weight: 700; overflow-wrap: anywhere; }
.install-steps { list-style: none; padding: 0; display: grid; gap: 0; counter-reset: install; }
.install-steps li { counter-increment: install; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-md); padding-block: var(--space-lg); border-block-end: var(--rule-hair) solid var(--color-rule); }
.install-steps li::before { content: counter(install, decimal-leading-zero); font-family: var(--font-mono); color: var(--color-red); font-weight: 800; }

.guide-layout { display: grid; gap: var(--space-xl); }
.toc { border-block: var(--rule-strong) solid var(--color-ink); padding-block: var(--space-md); }
.toc strong { display: block; margin-block-end: var(--space-xs); }
.toc-list { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-xs) var(--space-lg); }
.toc-list a { white-space: nowrap; }
.guide-card { border-block-start: var(--rule-strong) solid var(--color-ink); padding-block-start: var(--space-lg); display: grid; gap: var(--space-sm); }
.guide-card h3 { font-size: var(--text-lg); }
.guide-card a { inline-size: fit-content; white-space: nowrap; }
.article { display: grid; gap: var(--space-2xl); max-width: 76ch; }
.article section { display: grid; gap: var(--space-md); scroll-margin-top: 7rem; }
.article h2 { font-size: var(--text-2xl); }
.article h3 { font-size: var(--text-lg); }
.article p, .article li { line-height: 1.8; }
.article table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.article th, .article td { padding: var(--space-sm); border-block-end: var(--rule-hair) solid var(--color-rule); text-align: start; vertical-align: top; }
.notice { border: var(--rule-strong) solid var(--color-red); padding: var(--space-md); color: var(--color-ink); background: var(--color-paper); }

@media (hover: hover) and (pointer: fine) {
  .btn:hover { transform: translateY(-1px); }
  .btn-primary:hover { background: var(--color-accent-deep); color: var(--color-nav-ink); }
  .product-media:hover img, .product-media:focus-visible img, .gallery-item:hover img, .gallery-item:focus-visible img { transform: scale(1.02); }
  .audience-card:hover { transform: translateY(-2px); transition: transform var(--dur-short) var(--ease-out); }
}

@media (min-width: 40rem) {
  .facts-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .product-grid, .gallery-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .audience-grid, .guide-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .platform-grid, .requirements-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sticky-cta-copy { display: block; }
  .hero h1 { font-size: var(--text-display); }
}

@media (min-width: 60rem) {
  .nav-links { display: flex; }
  .menu-toggle, .mobile-menu { display: none; }
  .facts-grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .story-layout { grid-template-columns: minmax(0, 1.45fr) minmax(16rem, 0.55fr); }
  .feature-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-item:nth-child(odd) { padding-inline-end: var(--space-xl); }
  .feature-item:nth-child(even) { padding-inline-start: var(--space-xl); border-inline-start: var(--rule-hair) solid var(--color-rule); }
  .product-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .gallery-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .audience-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .guide-layout { grid-template-columns: minmax(14rem, 0.36fr) minmax(0, 1fr); align-items: start; }
  .toc { position: sticky; inset-block-start: 6rem; }
  .toc-list { display: grid; }
  .spec-list div { grid-template-columns: 9rem minmax(0, 1fr); }
}

@media (min-width: 90rem) {
  .shell { width: min(82rem, 100%); }
  .gallery-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (pointer: coarse) {
  .btn, .filter-tab, .menu-toggle, .lightbox-close, .lightbox-prev, .lightbox-next { min-height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 150ms !important; animation-iteration-count: 1 !important; transition-duration: 150ms !important; }
  .hero-copy { animation: none; }
  .btn-primary::after { display: none; }
}