/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V5 */
/* Hallmark · macrostructure: Feature Stack · tone: technical-atmospheric · anchor hue: cool-blue · contrast: pass (40–41) · nav: N12 · footer: Ft3 · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (49) · icons: pass (30) · mobile: pass (34, 49, 50–57) */
@import url("../../tokens.css");

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

html,
body {
  margin: 0;
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  background: var(--color-paper-deep);
}

body {
  min-width: 20rem;
  padding-block-end: calc(4.75rem + env(safe-area-inset-bottom));
  color: var(--color-ink);
  background: var(--color-paper);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.is-locked {
  overflow: clip;
}

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

img {
  height: auto;
}

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

button,
a {
  -webkit-tap-highlight-color: var(--color-transparent);
}

a {
  color: var(--color-accent);
  text-underline-offset: var(--space-2xs);
}

a:active {
  color: var(--color-accent-strong);
}

button {
  border: 0;
}

button:disabled,
button[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

:focus-visible {
  outline: var(--rule-strong) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

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

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-tooltip);
  padding: var(--space-sm) var(--space-md);
  color: var(--color-paper-deep);
  background: var(--color-focus);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: none;
}

.shell {
  width: min(100%, var(--page-max));
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.content-shell {
  width: min(100%, var(--content-max));
  margin-inline: auto;
  padding-inline: var(--page-gutter);
}

.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-sticky);
  min-height: var(--nav-height);
  color: var(--color-ink);
  background: var(--color-paper-deep);
  border-block-end: var(--rule-hair) solid var(--color-rule-2);
  transition: transform var(--dur-long) var(--ease-out);
}

.nav.is-compact {
  transform: translateY(calc(-1 * var(--banner-height)));
}

.nav.is-dismissed {
  transform: none;
}

.nav__banner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  height: var(--banner-height);
  padding-inline: calc(var(--space-xl) + var(--space-md));
  color: var(--color-ink);
  background: var(--color-vermilion);
  font-size: var(--text-sm);
  white-space: nowrap;
  overflow: hidden;
}

.nav__banner a {
  color: var(--color-ink);
  font-weight: 700;
}

.nav__banner-close {
  position: absolute;
  inset: 0 var(--space-xs) 0 auto;
  display: grid;
  place-items: center;
  width: 2.75rem;
  min-height: 2.5rem;
  color: var(--color-ink);
  background: var(--color-transparent);
  cursor: pointer;
}

.nav.is-dismissed .nav__banner {
  display: none;
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: min(100%, var(--page-max));
  min-height: var(--nav-height);
  margin-inline: auto;
  padding: var(--space-sm) var(--page-gutter);
  transition: transform var(--dur-long) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}

.brand {
  display: inline-flex;
  flex: 0 1 auto;
  align-items: center;
  gap: var(--space-sm);
  min-width: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 800;
  text-decoration: none;
  white-space: nowrap;
}

.brand__mark {
  width: 2rem;
  aspect-ratio: 1;
  object-fit: cover;
  border: var(--rule-hair) solid var(--color-rule);
}

.brand__text {
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav__links {
  display: none;
  align-items: center;
  gap: var(--space-xs);
  margin: 0 auto;
  padding: 0;
  list-style: none;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding-inline: var(--space-sm);
  color: var(--color-ink-2);
  text-decoration: none;
  white-space: nowrap;
}

.nav__link[aria-current="page"],
.nav__link:hover {
  color: var(--color-accent);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-inline-start: auto;
}

.menu-toggle,
.icon-button {
  display: inline-grid;
  place-items: center;
  width: 2.75rem;
  min-width: 2.75rem;
  min-height: 2.75rem;
  padding: 0;
  color: var(--color-ink);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-xs);
  cursor: pointer;
}

.menu-toggle svg,
.icon-button svg {
  width: 1.25rem;
}

.mobile-menu {
  position: fixed;
  inset: var(--nav-height) 0 auto;
  z-index: var(--z-dropdown);
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-lg) var(--page-gutter);
  background: var(--color-paper-deep);
  border-block-end: var(--rule-strong) solid var(--color-rule);
  opacity: 0;
  transform: translateY(-0.5rem);
  pointer-events: none;
  transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}

.mobile-menu.is-open {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.mobile-menu a {
  display: flex;
  align-items: center;
  min-height: 3rem;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  min-height: 2.875rem;
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-ink);
  background: var(--color-paper-3);
  border: var(--rule-strong) solid var(--color-rule);
  border-radius: var(--radius-xs);
  box-shadow: var(--shadow-hard);
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  overflow: hidden;
  transition: transform var(--dur-micro) var(--ease-out), background-color var(--dur-short) var(--ease-out);
}

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

.btn--primary::after {
  position: absolute;
  inset: 0 auto 0 -45%;
  width: 28%;
  content: "";
  background: var(--color-focus);
  opacity: 0.32;
  transform: skewX(-18deg);
  transition: transform var(--dur-long) var(--ease-out);
}

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

.btn--primary:hover::after,
.btn--primary:focus-visible::after {
  transform: translateX(560%) skewX(-18deg);
}

.btn--secondary {
  color: var(--color-accent);
  background: var(--color-paper-deep);
  border-color: var(--color-accent);
}

.btn:active,
.btn[data-state="loading"] {
  box-shadow: var(--shadow-hard-small);
  transform: translateY(2px);
}

.btn[aria-disabled="true"],
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn[data-state="loading"]::before {
  width: 1rem;
  aspect-ratio: 1;
  content: "";
  border: var(--rule-strong) solid currentColor;
  border-inline-end-color: var(--color-transparent);
  border-radius: var(--radius-pill);
  animation: spin 0.9s linear infinite;
}

.btn[data-state="success"] {
  color: var(--color-action-ink);
  background: var(--color-success);
  border-color: var(--color-success);
}

.btn[data-state="error"] {
  color: var(--color-ink);
  background: var(--color-error);
  border-color: var(--color-error);
}

@keyframes spin {
  to { transform: rotate(1turn); }
}

.hero {
  position: relative;
  padding-block: calc(var(--nav-height) + var(--space-lg)) var(--space-xl);
  background: var(--color-paper-deep);
}

body.has-banner .hero {
  padding-block-start: calc(var(--nav-height) + var(--banner-height) + var(--space-lg));
}

body.has-banner .page-hero {
  padding-block-start: calc(var(--nav-height) + var(--banner-height) + var(--space-2xl));
}

body.has-banner .mobile-menu {
  inset-block-start: calc(var(--nav-height) + var(--banner-height));
}

.hero::before {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(180deg, var(--color-overlay-soft), var(--color-transparent));
  pointer-events: none;
}

.hero__grid {
  position: relative;
  z-index: var(--z-base);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
}

.media-viewer {
  display: grid;
  gap: var(--space-sm);
  min-width: 0;
  order: 2;
}

.media-viewer__stage {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  overflow: hidden;
}

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

.media-viewer__open {
  position: absolute;
  inset: auto var(--space-sm) var(--space-sm) auto;
}

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

.media-thumb {
  min-width: 0;
  padding: 0;
  background: var(--color-paper-2);
  border: var(--rule-strong) solid var(--color-rule-2);
  cursor: pointer;
}

.media-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-thumb[aria-current="true"] {
  border-color: var(--color-accent);
}

.hero__copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-lg);
  order: 1;
}

.hero__logo {
  width: min(9rem, 52%);
  aspect-ratio: 225 / 207;
  object-fit: contain;
  object-position: left center;
}

.tag-row,
.metric-row,
.cta-row,
.platform-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);
  color: var(--color-accent);
  background: var(--color-paper-2);
  border-inline-start: var(--rule-strong) solid var(--color-accent);
  font-size: var(--text-sm);
  white-space: nowrap;
}

.tag--age {
  color: var(--color-ink);
  border-color: var(--color-vermilion);
}

h1,
h2,
h3 {
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
  overflow-wrap: anywhere;
}

h1 {
  font-size: var(--text-display-s);
}

h2 {
  font-size: clamp(1.8rem, 3.4vw, var(--text-3xl));
}

h3 {
  font-size: var(--text-lg);
}

p {
  margin: 0;
}

.lede {
  max-width: 58ch;
  color: var(--color-ink-2);
  font-size: var(--text-md);
  line-height: 1.7;
}

.metric {
  display: grid;
  gap: var(--space-3xs);
  min-width: 7.25rem;
  padding: var(--space-sm);
  background: var(--color-paper-2);
  border-block-start: var(--rule-strong) solid var(--color-rule);
}

.metric strong {
  color: var(--color-ink);
  font-size: var(--text-md);
  font-variant-numeric: tabular-nums;
}

.metric span {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.price-line {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
  min-height: 2rem;
  font-variant-numeric: tabular-nums;
}

.price-line__current {
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
}

.price-line__original {
  color: var(--color-muted);
  text-decoration: line-through;
}

.price-line__discount {
  padding-inline: var(--space-xs);
  color: var(--color-action-ink);
  background: var(--color-action);
  font-weight: 700;
}

.info-strip {
  position: relative;
  z-index: var(--z-raised);
  margin-block-start: calc(-1 * var(--space-md));
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
}

.info-item {
  min-width: 0;
  padding: var(--space-md);
  border: var(--rule-hair) solid var(--color-rule-2);
}

.info-item dt {
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.info-item dd {
  margin: var(--space-xs) 0 0;
  color: var(--color-ink);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.section {
  padding-block: var(--space-3xl);
}

.section--tight {
  padding-block: var(--space-2xl);
}

.section--deep {
  color: var(--color-ink);
  background: var(--color-paper-deep);
}

.section--raised {
  color: var(--color-ink);
  background: var(--color-paper-2);
}

.section-head {
  display: grid;
  gap: var(--space-md);
  max-width: 68ch;
  margin-block-end: var(--space-xl);
}

.section-head p {
  color: var(--color-ink-2);
  font-size: var(--text-md);
}

.prose {
  display: grid;
  gap: var(--space-lg);
  max-width: 70ch;
  color: var(--color-ink-2);
  font-size: var(--text-md);
  line-height: 1.8;
}

.prose--center {
  margin-inline: auto;
  text-align: center;
}

.split-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: center;
}

.split-block + .split-block {
  margin-block-start: var(--space-3xl);
}

.split-block__copy {
  display: grid;
  gap: var(--space-lg);
  min-width: 0;
}

.split-block__copy p {
  max-width: 58ch;
  color: var(--color-ink-2);
  font-size: var(--text-md);
}

.split-block__media {
  min-width: 0;
  margin: 0;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
}

.split-block__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.split-block__media figcaption {
  padding: var(--space-sm) var(--space-md);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

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

.feature {
  display: grid;
  align-content: start;
  gap: var(--space-md);
  min-width: 0;
  padding: var(--space-lg);
  background: var(--color-paper-2);
  border-block-start: var(--rule-strong) solid var(--color-rule);
  transition: transform var(--dur-short) var(--ease-out);
}

.feature:nth-child(2n) {
  background: var(--color-paper-3);
  border-color: var(--color-vermilion);
}

.feature__index {
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.feature p {
  color: var(--color-ink-2);
}

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

.gallery-item {
  position: relative;
  min-width: 0;
  padding: 0;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  cursor: zoom-in;
  overflow: hidden;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform var(--dur-short) var(--ease-out);
}

.gallery-item::after {
  position: absolute;
  inset: auto var(--space-sm) var(--space-sm) auto;
  padding: var(--space-xs) var(--space-sm);
  color: var(--color-ink);
  background: var(--color-paper-deep);
  content: "全屏查看";
  font-size: var(--text-sm);
  opacity: 1;
}

.gallery-item[data-hidden="true"] {
  display: none;
}

.gallery-tabs {
  display: flex;
  gap: var(--space-xs);
  margin-block-end: var(--space-xl);
  overflow-x: auto;
  scrollbar-width: thin;
}

.tab {
  flex: 0 0 auto;
  min-height: 2.75rem;
  padding-inline: var(--space-md);
  color: var(--color-ink-2);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  cursor: pointer;
  white-space: nowrap;
}

.tab[aria-selected="true"] {
  color: var(--color-accent-ink);
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.tab:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.menu-toggle:active,
.icon-button:active,
.tab:active,
.timeline summary:active,
.faq summary:active {
  background: var(--color-paper-raised);
}

.media-thumb:active,
.gallery-item:active {
  border-color: var(--color-action);
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  color: var(--color-ink-2);
  font-variant-numeric: tabular-nums;
}

.spec-table th,
.spec-table td {
  padding: var(--space-md);
  text-align: start;
  border-block-end: var(--rule-hair) solid var(--color-rule);
}

.spec-table th {
  width: 32%;
  color: var(--color-muted);
  font-weight: 400;
}

.spec-table td {
  color: var(--color-ink);
  font-weight: 700;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
  padding: var(--space-xl);
  color: var(--color-ink);
  background: var(--color-paper-3);
  border: var(--rule-strong) solid var(--color-action);
}

.download-panel__copy {
  display: grid;
  gap: var(--space-md);
}

.download-panel__copy p {
  color: var(--color-ink-2);
}

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

.platform-card {
  display: grid;
  align-content: start;
  gap: var(--space-md);
  min-width: 0;
  padding: var(--space-xl);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
}

.platform-card--recommended {
  border-block-start: var(--rule-strong) solid var(--color-action);
}

.platform-card p,
.platform-card li {
  color: var(--color-ink-2);
}

.platform-card ul {
  display: grid;
  gap: var(--space-xs);
  margin: 0;
  padding-inline-start: var(--space-lg);
}

.steps {
  display: grid;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.step {
  position: relative;
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-lg) var(--space-lg) var(--space-lg) calc(var(--space-2xl) + var(--space-xs));
  background: var(--color-paper-2);
  border-inline-start: var(--rule-strong) solid var(--color-rule);
  counter-increment: step;
}

.step::before {
  position: absolute;
  inset: var(--space-lg) auto auto var(--space-lg);
  display: grid;
  place-items: center;
  width: 2rem;
  aspect-ratio: 1;
  color: var(--color-accent-ink);
  background: var(--color-accent);
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-body);
  font-weight: 700;
}

.step p {
  color: var(--color-ink-2);
}

.timeline {
  display: grid;
  gap: var(--space-md);
}

.timeline details,
.faq details {
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
}

.timeline summary,
.faq summary {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  min-height: 3.5rem;
  padding: var(--space-md) calc(var(--space-xl) + var(--space-md)) var(--space-md) var(--space-md);
  color: var(--color-ink);
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

.timeline summary::-webkit-details-marker,
.faq summary::-webkit-details-marker {
  display: none;
}

.timeline summary::after,
.faq summary::after {
  position: absolute;
  inset-inline-end: var(--space-md);
  color: var(--color-accent);
  content: "+";
  font-family: var(--font-body);
  font-size: var(--text-xl);
}

.timeline details[open] summary::after,
.faq details[open] summary::after {
  content: "−";
}

.details-body {
  display: grid;
  gap: var(--space-md);
  padding: 0 var(--space-md) var(--space-lg);
  color: var(--color-ink-2);
}

.details-body ul,
.article-body ul,
.article-body ol {
  display: grid;
  gap: var(--space-sm);
}

.review-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
}

.review-score {
  display: grid;
  align-content: center;
  gap: var(--space-sm);
  min-height: 13rem;
  padding: var(--space-xl);
  color: var(--color-ink);
  background: var(--color-paper-deep);
  border-inline-start: var(--rule-strong) solid var(--color-accent);
}

.review-score strong {
  color: var(--color-accent);
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-variant-numeric: tabular-nums;
}

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

.audience-card {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-paper-3);
  border-block-start: var(--rule-strong) solid var(--color-vermilion);
}

.audience-card p {
  color: var(--color-ink-2);
}

.faq {
  display: grid;
  gap: var(--space-sm);
}

.final-cta {
  position: relative;
  display: grid;
  gap: var(--space-lg);
  padding: var(--space-2xl) var(--page-gutter);
  color: var(--color-ink);
  background: var(--color-paper-deep);
  border-block: var(--rule-strong) solid var(--color-vermilion);
  overflow: hidden;
}

.final-cta::after {
  position: absolute;
  inset: 0 0 0 auto;
  width: min(24rem, 45%);
  content: "";
  background-image: url("../images/big-tiddy-goth-baddie-logo-01.webp");
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  opacity: 0.12;
  pointer-events: none;
}

.final-cta > * {
  position: relative;
  z-index: var(--z-base);
}

.final-cta p {
  max-width: 55ch;
  color: var(--color-ink-2);
}

.site-footer {
  padding-block: var(--space-2xl) calc(var(--space-2xl) + env(safe-area-inset-bottom));
  color: var(--color-ink-2);
  background: var(--color-paper-deep);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

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

.footer-intro {
  display: grid;
  gap: var(--space-md);
  max-width: 60ch;
}

.footer-groups {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
}

.footer-group {
  display: grid;
  align-content: start;
  gap: var(--space-xs);
  min-width: 0;
}

.footer-group h2 {
  margin-block-end: var(--space-xs);
  color: var(--color-muted);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0;
}

.footer-group a {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-ink-2);
  text-decoration: none;
  white-space: nowrap;
}

.footer-group a:hover {
  color: var(--color-accent);
}

.footer-colophon {
  display: grid;
  gap: var(--space-sm);
  margin-block-start: var(--space-xl);
  padding-block-start: var(--space-lg);
  color: var(--color-muted);
  border-block-start: var(--rule-hair) solid var(--color-rule);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.sticky-cta {
  position: fixed;
  inset: auto 0 0;
  z-index: var(--z-sticky);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  padding: var(--space-xs) max(var(--space-md), env(safe-area-inset-right)) max(var(--space-xs), env(safe-area-inset-bottom)) max(var(--space-md), env(safe-area-inset-left));
  color: var(--color-ink);
  background: var(--color-paper-deep);
  border-block-start: var(--rule-strong) solid var(--color-rule);
}

.sticky-cta__meta {
  display: none;
  min-width: 0;
  color: var(--color-ink-2);
  font-size: var(--text-sm);
}

.sticky-cta .btn {
  flex: 1 0 auto;
}

.lightbox {
  position: fixed;
  inset: 0;
  width: min(calc(100% - 2 * var(--space-md)), 76rem);
  max-width: none;
  max-height: calc(100dvh - 2 * var(--space-md));
  margin: auto;
  padding: var(--space-md);
  color: var(--color-ink);
  background: var(--color-paper-deep);
  border: var(--rule-hair) solid var(--color-rule);
}

.lightbox::backdrop {
  background: var(--color-overlay);
}

.lightbox__figure {
  display: grid;
  gap: var(--space-sm);
  margin: 0;
}

.lightbox__figure img {
  width: 100%;
  max-height: calc(100dvh - 9rem);
  object-fit: contain;
}

.lightbox__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  margin-block-start: var(--space-sm);
}

.lightbox__caption {
  min-width: 0;
  color: var(--color-ink-2);
  overflow-wrap: anywhere;
}

.page-hero {
  padding-block: calc(var(--nav-height) + var(--space-2xl)) var(--space-2xl);
  color: var(--color-ink);
  background: var(--color-paper-deep);
  border-block-end: var(--rule-strong) solid var(--color-rule);
}

.page-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
  align-items: end;
}

.page-hero__copy {
  display: grid;
  gap: var(--space-lg);
}

.page-hero h1 {
  font-size: var(--text-display-s);
}

.page-hero__media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: var(--rule-hair) solid var(--color-rule);
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-xl);
}

.guide-toc {
  display: grid;
  align-content: start;
  gap: var(--space-xs);
  padding: var(--space-lg);
  background: var(--color-paper-2);
  border-block-start: var(--rule-strong) solid var(--color-accent);
}

.guide-toc a {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-ink-2);
  text-decoration: none;
  white-space: nowrap;
}

.guide-toc a:hover {
  color: var(--color-accent);
}

.guide-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-md);
}

.guide-card {
  display: grid;
  gap: var(--space-md);
  padding: var(--space-lg);
  color: var(--color-ink);
  background: var(--color-paper-3);
  border-inline-start: var(--rule-strong) solid var(--color-vermilion);
}

.guide-card p {
  color: var(--color-ink-2);
}

.guide-card a {
  width: fit-content;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.article-body {
  display: grid;
  gap: var(--space-lg);
  min-width: 0;
  color: var(--color-ink-2);
  font-size: var(--text-md);
}

.article-body article,
.article-body section {
  display: grid;
  gap: var(--space-md);
  scroll-margin-block-start: calc(var(--nav-height) + var(--space-lg));
}

.article-body article + article,
.article-body section + section {
  margin-block-start: var(--space-xl);
  padding-block-start: var(--space-xl);
  border-block-start: var(--rule-hair) solid var(--color-rule);
}

.notice {
  padding: var(--space-lg);
  color: var(--color-ink);
  background: var(--color-paper-3);
  border-inline-start: var(--rule-strong) solid var(--color-vermilion);
}

.back-top {
  position: fixed;
  inset: auto var(--space-md) calc(5.25rem + env(safe-area-inset-bottom)) auto;
  z-index: var(--z-sticky);
  opacity: 0;
  transform: translateY(var(--space-sm));
  pointer-events: none;
  transition: transform var(--dur-short) var(--ease-out), opacity var(--dur-short) var(--ease-out);
}

.back-top.is-visible {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.empty-filter {
  padding: var(--space-xl);
  color: var(--color-ink-2);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
}

@media (hover: hover) and (pointer: fine) {
  .feature:hover,
  .feature:focus-within {
    transform: translateY(-2px);
  }

  .gallery-item:hover img {
    transform: scale(1.02);
  }

  .menu-toggle:hover,
  .icon-button:hover,
  .tab:hover {
    background: var(--color-paper-3);
  }
}

@media (min-width: 40rem) {
  .hero {
    padding-block-end: var(--space-2xl);
  }

  .hero__logo {
    width: min(12rem, 58%);
  }

  .info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .feature-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .feature:first-child {
    grid-column: 1 / -1;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .platform-grid,
  .guide-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .audience-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .footer-groups {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .sticky-cta__meta {
    display: block;
  }

  .sticky-cta .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 48rem) {
  .nav__links {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .mobile-menu {
    display: none;
  }

  .split-block {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .split-block--reverse .split-block__copy {
    grid-column: 2;
  }

  .split-block--reverse .split-block__media {
    grid-row: 1;
    grid-column: 1;
  }

  .download-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .review-summary {
    grid-template-columns: minmax(15rem, 0.7fr) minmax(0, 1.3fr);
  }

  .page-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .footer-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  }
}

@media (min-width: 60rem) {
  .hero {
    padding-block: calc(var(--nav-height) + var(--space-sm)) var(--space-xl);
  }

  body.has-banner .hero {
    padding-block-start: calc(var(--nav-height) + var(--banner-height) + var(--space-sm));
  }

  .hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(20rem, 0.65fr);
    gap: var(--space-lg);
    align-items: center;
  }

  .hero__copy {
    order: 2;
    gap: var(--space-sm);
    padding-block: 0;
  }

  .media-viewer {
    order: 1;
  }

  .hero__logo {
    width: min(7rem, 42%);
  }

  .hero h1 {
    font-size: clamp(2.2rem, 3.3vw, 3.15rem);
  }

  .hero .lede {
    line-height: 1.55;
  }

  .hero .metric {
    min-width: calc(50% - var(--space-xs));
    padding: var(--space-xs) var(--space-sm);
  }

  .info-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .gallery-grid--page {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .gallery-grid--page .gallery-item:first-child {
    grid-column: span 2;
  }

  .guide-layout {
    grid-template-columns: 17rem minmax(0, 1fr);
    align-items: start;
  }

  .guide-toc {
    position: sticky;
    inset-block-start: calc(var(--nav-height) + var(--space-lg));
  }

  .feature-stack {
    display: grid;
    grid-template-columns: minmax(18rem, 4fr) minmax(0, 8fr);
    gap: var(--space-2xl);
    align-items: start;
  }

  .feature-stack > .section-head {
    position: sticky;
    inset-block-start: calc(var(--nav-height) + var(--space-lg));
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .feature-stack > .split-block {
    grid-column: 2;
    grid-template-columns: minmax(0, 1fr);
    margin-block-start: 0;
    padding-block-end: var(--space-3xl);
  }

  .feature-stack .split-block--reverse .split-block__copy,
  .feature-stack .split-block--reverse .split-block__media {
    grid-column: 1;
  }

  .feature-stack .split-block--reverse .split-block__media {
    grid-row: auto;
  }

  .footer-groups {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 90rem) {
  .hero__grid {
    gap: var(--space-2xl);
  }

  .feature-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .feature:first-child {
    grid-column: span 7;
  }

  .feature:nth-child(2) {
    grid-column: span 5;
  }

  .feature:nth-child(n + 3) {
    grid-column: span 4;
  }
}

@media (pointer: coarse) {
  .btn,
  .nav__link,
  .tab,
  .footer-group a {
    min-height: 3rem;
  }

  .gallery-item::after {
    opacity: 1;
    transform: none;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 150ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 150ms !important;
  }

  .btn--primary::after {
    display: none;
  }
}