:root {
  --font-sans:
    'PingFang SC', 'Microsoft YaHei UI', 'Microsoft YaHei', 'Noto Sans CJK SC', -apple-system,
    BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
  --text-body: 1.0625rem;
  --text-small: 0.875rem;
  --text-caption: 0.8125rem;
  --page-width: 1280px;
  --page-gutter: 24px;
  --bg: #f8f9fa;
  --surface: #f1f3f5;
  --ink: #0f172a;
  --body: #475569;
  --muted: #526176;
  --blue: #2563eb;
  --blue-hover: #1d4ed8;
  --line: #dfe3e8;
  --white: #fff;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--body);
  font-family: var(--font-sans);
  font-size: var(--text-body);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
h1,
h2,
h3,
p,
figure {
  margin: 0;
}
h1,
h2,
h3 {
  color: var(--ink);
  overflow-wrap: anywhere;
}
h1,
h2 {
  text-wrap: balance;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}
button,
a,
summary {
  touch-action: manipulation;
}
button {
  border: 0;
}
img,
svg {
  display: block;
}
svg {
  flex-shrink: 0;
}
img {
  max-width: 100%;
}
[hidden] {
  display: none !important;
}
::selection {
  background: #dbeafe;
  color: #172554;
}
:focus-visible {
  outline: 3px solid var(--blue-hover);
  outline-offset: 5px;
  border-radius: 4px;
}
[id] {
  scroll-margin-top: 96px;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.container {
  width: min(100% - var(--page-gutter) * 2, var(--page-width));
  margin-inline: auto;
}
.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 11px 18px;
  border-radius: 10px;
  font-size: var(--text-small);
  font-weight: 600;
  line-height: 1.6;
  text-align: center;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}
.button:active {
  transform: scale(0.98);
}
.button-dark {
  background: var(--ink);
  color: white;
}
.button-dark:hover {
  background: #1e293b;
}
.button-blue {
  background: var(--blue);
  color: white;
}
.button-blue:hover {
  background: var(--blue-hover);
}
.button-gray {
  background: #f1f3f5;
  color: #334155;
}
.button-gray:hover {
  background: #e2e8f0;
}
.button .icon {
  width: 16px;
  height: 16px;
}
.arrow {
  transition: transform 0.2s ease;
}
.button:hover .arrow {
  transform: translateX(3px);
}
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  height: 64px;
  border-bottom: 1px solid #e5e7eb80;
  background: #f8f9faf2;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.nav {
  width: min(100% - var(--page-gutter) * 2, var(--page-width));
  height: 100%;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-size: 1.4375rem;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--ink);
}
.brand-mark {
  display: block;
  object-fit: contain;
  width: 30px;
  height: 30px;
  color: var(--blue);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 100%;
  list-style: none;
  padding: 0;
  margin: 0;
}
.nav-links li {
  height: 100%;
}
.nav-links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  height: 100%;
  border-bottom: 2px solid transparent;
  padding-top: 2px;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  transition: color 0.2s;
}
.nav-links a:hover {
  color: var(--ink);
}
.nav-links [aria-current='page'] {
  color: var(--blue);
  font-weight: 650;
  border-bottom-color: var(--blue);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: transparent;
}
.subscribe:hover {
  transform: scale(1.02);
}
.main {
  flex: 1;
  padding-top: 144px;
  padding-bottom: 64px;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: var(--text-caption);
  font-weight: 600;
  letter-spacing: 0.14em;
  margin-bottom: 20px;
}
.eyebrow::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--blue);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: var(--text-small);
  font-weight: 600;
  margin-bottom: 24px;
}
.badge .icon {
  width: 15px;
  height: 15px;
}
.hero h1 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
}
.hero-description {
  max-width: 690px;
  margin-top: 20px;
  font-size: 1.125rem;
  line-height: 1.9;
}
.release-notice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  max-width: 760px;
  margin-top: 24px;
  font-size: var(--text-small);
  color: var(--muted);
  line-height: 1.9;
}
.release-notice .icon {
  width: 16px;
  height: 16px;
  margin-top: 4px;
}
.matrix-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  margin-top: 56px;
}
.matrix-heading h2 {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.02em;
}
.matrix-heading p {
  font-size: var(--text-caption);
  color: var(--muted);
}
.download-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 24px;
  margin-top: 24px;
}
.download-card {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  background: white;
  border: 1px solid #e5e7eb99;
  border-radius: 16px;
  padding: 24px 18px 18px;
  transition:
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}
.download-card:hover {
  border-color: #bfdbfe;
  box-shadow: 0 8px 22px #0f172a08;
}
.download-card.ios {
  border-color: #bfdbfe;
}
.os-icon {
  width: 34px;
  height: 34px;
  margin-bottom: 24px;
}
.download-card h3 {
  font-size: 1.125rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.4;
}
.version {
  margin-top: 12px;
  font-size: var(--text-small);
  font-weight: 600;
  color: #334155;
  font-variant-numeric: tabular-nums;
}
.specs {
  padding: 0;
  margin: 12px 0 0;
  list-style: none;
  font-size: var(--text-caption);
  color: var(--muted);
  line-height: 1.9;
}
.specs li + li {
  margin-top: 4px;
}
.card-bottom {
  width: 100%;
}
.card-bottom .button {
  width: 100%;
  padding-inline: 8px;
  font-size: var(--text-caption);
}
.package-state {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: var(--text-caption);
}
.package-state::before {
  content: '';
  width: 5px;
  height: 5px;
  flex-shrink: 0;
  border-radius: 50%;
  background: #64748b;
}
.matrix-note {
  margin-top: 20px;
  font-size: var(--text-small);
  color: var(--muted);
}
.text-link {
  display: inline-block;
  min-height: 24px;
  color: var(--blue-hover);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.gallery {
  margin-top: 80px;
  border-top: 1px solid var(--line);
  padding-top: 64px;
}
.gallery-heading {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}
.gallery h2 {
  font-size: 1.375rem;
  line-height: 1.4;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.gallery-heading p {
  font-size: var(--text-small);
  color: var(--muted);
}
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
}
.media-frame {
  aspect-ratio: 16/10;
  position: relative;
  width: 100%;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid #e5e7eb99;
  background: #e5e7eb66;
  box-shadow: 0 2px 4px #0f172a04;
}
.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.animate-pulse::before {
  content: '';
  position: absolute;
  inset: 0;
  background: #d8dfe8;
  animation: pulse 1.5s ease-in-out 3;
  pointer-events: none;
}
.media-frame.is-loaded::before,
.media-frame.is-error::before {
  display: none;
}
.media-error {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  padding: 24px;
  text-align: center;
  font-size: 0.9375rem;
}
.gallery figcaption {
  margin-top: 14px;
  font-size: var(--text-small);
  color: var(--muted);
}
.gallery figcaption strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-size: 0.9375rem;
  font-weight: 600;
}
.steps {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  list-style: none;
  padding: 0;
  margin: 28px 0 0;
  font-size: var(--text-small);
  color: var(--muted);
}
.steps li {
  display: flex;
  gap: 8px;
  align-items: center;
}
.step-number {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border: 1px solid #cbd5e1;
  border-radius: 50%;
  color: var(--ink);
  font-size: var(--text-caption);
  font-weight: 700;
}
@keyframes pulse {
  50% {
    opacity: 0.4;
  }
}
.site-footer {
  margin-top: 96px;
  padding: 64px 0 40px;
  background: var(--surface);
  border-top: 1px solid var(--line);
}
.footer-top {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 48px;
}
.footer-column h2 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 20px;
}
.footer-column ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-column a,
.footer-column button {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 5px 0;
  font-size: var(--text-small);
  background: transparent;
  text-align: left;
}
.footer-column a:hover,
.footer-column button:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  border-top: 1px solid #dce1e6;
  margin-top: 48px;
  padding-top: 24px;
  font-size: var(--text-caption);
  color: var(--muted);
}
.footer-language {
  display: flex;
  gap: 7px;
  align-items: center;
  flex-shrink: 0;
}
.footer-language .icon {
  width: 15px;
  height: 15px;
}
.footer-note {
  margin-top: 16px;
  font-size: var(--text-caption);
  color: var(--muted);
}
dialog {
  position: fixed;
  width: min(100% - 40px, 580px);
  max-height: 85dvh;
  margin: auto;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--bg);
  color: var(--body);
  box-shadow: 0 30px 100px #0f172a33;
  overflow: auto;
}
dialog:not([open]) {
  display: none;
}
dialog::backdrop {
  background: #0f172a66;
  backdrop-filter: blur(4px);
}
dialog h2 {
  padding-right: 36px;
  font-size: 1.5rem;
  line-height: 1.4;
  letter-spacing: -0.02em;
}
dialog h3 {
  margin-top: 24px;
  font-size: var(--text-body);
}
dialog p {
  margin-top: 16px;
  font-size: 0.9375rem;
  line-height: 1.9;
}
.dialog-close {
  position: absolute;
  right: 16px;
  top: 16px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: #e2e8f0;
  color: var(--ink);
}
.dialog-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.dialog-list {
  padding-left: 22px;
  margin-top: 20px;
  font-size: 0.9375rem;
  line-height: 1.9;
}
.dialog-list li + li {
  margin-top: 12px;
}
code {
  font-family: Consolas, monospace;
  font-size: 0.9em;
  background: #e2e8f0;
  padding: 2px 5px;
  border-radius: 4px;
  overflow-wrap: anywhere;
}
.noscript-note {
  margin: 88px auto 0;
  padding: 12px 20px;
  background: #e2e8f0;
  color: var(--ink);
  font-size: 0.9375rem;
}
@media (max-width: 1100px) {
  .nav-links {
    gap: 24px;
  }
  .download-grid {
    gap: 16px;
  }
  .download-card {
    padding: 24px 14px 16px;
  }
  .card-bottom .button {
    font-size: var(--text-caption);
  }
}
@media (max-width: 1023px) {
  .download-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
  .download-card {
    padding: 28px 24px 24px;
  }
  .card-bottom .button {
    font-size: var(--text-small);
  }
  .hero h1 {
    max-width: 760px;
  }
  .gallery-grid {
    gap: 24px;
  }
}
@media (max-width: 767px) {
  :root {
    --page-gutter: 20px;
  }
  .nav {
    gap: 12px;
  }
  .brand {
    font-size: 1.3125rem;
    gap: 8px;
  }
  .brand-mark {
    width: 27px;
    height: 27px;
  }
  .subscribe {
    padding-inline: 14px;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    height: auto;
    gap: 0;
    padding: 12px 20px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 20px #0f172a08;
    max-height: calc(100dvh - 64px);
    overflow: auto;
  }
  .nav-links[data-collapsed='true'] {
    display: none;
  }
  .nav-links a {
    min-height: 48px;
    padding: 10px 8px;
  }
  .nav-links [aria-current='page'] {
    border-bottom-color: transparent;
    background: #eff6ff;
    border-radius: 8px;
  }
  .main {
    padding-top: 128px;
    padding-bottom: 40px;
  }
  .hero h1 {
    font-size: clamp(1.875rem, 7vw, 2.625rem);
  }
  .hero-description {
    font-size: var(--text-body);
  }
  .matrix-heading {
    align-items: start;
    margin-top: 40px;
    gap: 12px;
  }
  .download-grid {
    gap: 16px;
  }
  .download-card {
    padding: 24px 18px 18px;
  }
  .gallery {
    margin-top: 64px;
    padding-top: 48px;
  }
  .gallery-heading {
    align-items: start;
    flex-direction: column;
    gap: 12px;
  }
  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .site-footer {
    margin-top: 64px;
  }
  .footer-top {
    gap: 28px;
  }
  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }
  .steps {
    flex-direction: column;
  }
  .release-notice {
    font-size: var(--text-small);
  }
  .matrix-heading p {
    max-width: 160px;
    text-align: right;
  }
}
@media (max-width: 639px) {
  .download-grid {
    grid-template-columns: 1fr;
  }
  .download-card {
    padding: 28px 24px 24px;
  }
  .card-bottom .button {
    font-size: var(--text-small);
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-column h2 {
    margin-bottom: 12px;
  }
}
@media (max-width: 359px) {
  :root {
    --page-gutter: 16px;
  }
  .hero h1 {
    font-size: 1.875rem;
  }
  .matrix-heading {
    flex-direction: column;
  }
  .matrix-heading p {
    max-width: none;
    text-align: left;
  }
  dialog {
    padding: 28px 24px;
  }
  .footer-language {
    flex-wrap: wrap;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .button:hover,
  .button:active,
  .button:hover .arrow {
    transform: none;
  }
}
@media (forced-colors: active) {
  .button,
  .menu-toggle,
  .step-number {
    border: 1px solid ButtonText;
  }
  .download-card,
  .media-frame {
    border: 1px solid CanvasText;
  }
  :focus-visible {
    outline-color: Highlight;
  }
}

.button,
.download-action,
.subscribe {
  font-size: var(--text-small);
  font-weight: 600;
}
.nav-links a {
  font-size: 0.9375rem;
  letter-spacing: 0;
}
.summary,
.intro,
.answer-inner,
.faq-answer,
.guide-content,
.scenario p,
.article-reader .body-copy,
.reader-lead,
.section-intro {
  font-size: var(--text-body);
  line-height: 1.85;
}
.eyebrow,
.article-meta,
.byline,
.post-meta,
.guide-meta,
.reference,
.references ol,
.footer-bottom {
  font-size: var(--text-small);
}
span.category,
span.tag,
.reader-label,
.list-caption {
  font-size: var(--text-caption);
}
.faq-item h2,
.faq-item h3,
.guide h3 {
  font-size: 1.125rem;
  line-height: 1.75;
  font-weight: 600;
}
.toc a,
.article-end a {
  font-size: var(--text-small);
}
.footer-column h2 {
  font-size: 1rem;
}
.footer-column a,
.footer-column button {
  font-size: var(--text-small);
}
.specs,
.steps,
.workflow-steps p,
.proof-description {
  font-size: var(--text-small);
  line-height: 1.8;
}
.download-card h3 {
  font-size: 1.25rem;
  line-height: 1.5;
}
dialog p,
.dialog-list,
.legal-list {
  font-size: 1rem;
  line-height: 1.8;
}
h1 {
  letter-spacing: -0.02em;
}
button,
input,
select,
textarea {
  font-family: inherit;
}
@media (max-width: 767px) {
  :root {
    --text-body: 1rem;
  }
  .faq-item h2,
  .faq-item h3,
  .guide h3 {
    font-size: var(--text-body);
  }
  .brand {
    font-size: 1.3125rem;
  }
  .subscribe {
    padding-inline: 12px;
  }
  .hero-description {
    font-size: var(--text-body);
    line-height: 1.8;
  }
}

@media screen {
  :root {
    --header-height: 64px;
    --page-gutter: 32px;
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
    --layout-section: 80px;
    --layout-page-top: 112px;
    --layout-bottom: 80px;
    --layout-gap: 24px;
    --layout-card: 24px;
    --layout-report: 40px;
    --layout-paragraph: 20px;
    --layout-chapter: 40px;
  }
  html {
    scroll-padding-top: calc(var(--header-height) + var(--space-4));
  }
  body {
    line-height: 1.8;
  }
  section,
  [id],
  button,
  :focus-visible {
    scroll-margin-top: 0;
  }
  .site-header {
    height: var(--header-height);
  }
  .nav {
    gap: var(--space-6);
  }
  h1 {
    line-height: 1.4;
  }
  .eyebrow {
    margin-bottom: var(--space-4);
  }
  .main {
    padding-top: var(--layout-page-top);
    padding-bottom: var(--layout-bottom);
  }
  .section {
    padding-block: var(--layout-section);
  }
  .section-heading {
    gap: var(--space-6);
    margin-bottom: var(--space-8);
  }
  .intro,
  .summary {
    margin-top: var(--space-6);
    line-height: 1.8;
  }
  .section-intro {
    margin-top: var(--space-4);
    line-height: 1.8;
  }
  .button,
  .download-action {
    min-height: 48px;
    gap: var(--space-2);
    padding-block: 12px;
    line-height: 1.6;
  }
  .menu-toggle {
    width: 44px;
    height: 44px;
  }
  .footer-column h2 {
    margin-bottom: var(--space-3);
  }
  .footer-column a,
  .footer-column button {
    min-height: 44px;
    padding-block: 8px;
    line-height: 1.65;
  }
  .site-footer {
    margin-top: 0;
    padding: var(--space-12) 0 var(--space-8);
  }
  .footer-top {
    gap: var(--space-8);
  }
  .footer-bottom {
    gap: var(--space-6);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    line-height: 1.7;
  }
  .breadcrumb-wrap {
    padding-top: calc(var(--header-height) + var(--space-6));
  }
  .back-link {
    min-height: 44px;
    gap: var(--space-2);
  }
  .article-main {
    padding: 0 var(--page-gutter) var(--layout-bottom);
  }
  .report {
    margin: var(--space-6) auto 0;
    padding: var(--layout-report);
  }
  body[data-page='privacy'] .article-main,
  body[data-page='terms'] .article-main {
    padding-top: var(--layout-page-top);
  }
  body[data-page='privacy'] .report,
  body[data-page='terms'] .report {
    margin-top: 0;
  }
  .article-meta {
    gap: var(--space-2) var(--space-4);
    margin-top: var(--space-4);
  }
  .byline {
    margin-top: var(--space-2);
  }
  .prose {
    margin-top: var(--space-8);
  }
  .prose section + section {
    margin-top: var(--layout-chapter);
  }
  .prose h2 {
    margin: 0 0 var(--space-5);
    line-height: 1.55;
  }
  .prose h3 {
    margin: var(--space-6) 0 var(--space-3);
    line-height: 1.65;
  }
  .prose p,
  .prose ul,
  .summary,
  .article-reader .body-copy,
  .reader-lead {
    line-height: 1.8;
  }
  .prose p + p {
    margin-top: var(--layout-paragraph);
  }
  .prose ul {
    margin: var(--space-4) 0 0;
    padding-left: var(--space-6);
  }
  .prose li + li {
    margin-top: var(--space-2);
  }
  .references {
    margin-top: var(--layout-chapter);
    padding-top: var(--space-6);
  }
  .references h2 {
    margin-bottom: var(--space-4);
  }
  .references ol {
    line-height: 1.8;
  }
  .references li + li {
    margin-top: var(--space-2);
  }
  .references a {
    min-height: 32px;
  }
  .toc {
    margin-top: var(--space-6);
    padding-block: var(--space-4);
  }
  .toc ol {
    gap: var(--space-2) var(--space-6);
    margin-top: var(--space-2);
  }
  .toc a {
    min-height: 44px;
    padding-block: 8px;
    line-height: 1.6;
  }
  .download-cta {
    margin-top: var(--layout-chapter);
    padding: var(--layout-card);
  }
  .download-cta .button {
    margin-top: var(--space-4);
  }
  .cta-title {
    line-height: 1.65;
  }
  .article-end {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
  }
  .article-end a {
    min-height: 44px;
  }
  .post-list {
    margin-top: var(--space-8);
  }
  .post {
    margin-top: 0;
  }
  .post-link {
    gap: var(--space-6);
    padding-block: var(--space-6);
    min-height: 120px;
  }
  .post-meta {
    gap: var(--space-4);
    margin-bottom: var(--space-2);
  }
  .post h2 {
    line-height: 1.65;
  }
  .article-reader {
    margin-top: var(--space-10);
    padding-top: var(--space-8);
  }
  .article-reader h3 {
    margin-top: var(--space-6);
    margin-bottom: var(--space-3);
  }
  .article-reader .body-copy + .body-copy {
    margin-top: var(--layout-paragraph);
  }
  .topic-links {
    gap: var(--space-2) var(--space-3);
    margin-top: var(--space-6);
  }
  .topic-links a {
    min-height: 44px;
    padding: 8px 12px;
    line-height: 1.6;
  }
  .faq-list {
    margin-top: var(--space-8);
  }
  .faq-list .faq-item {
    margin-bottom: var(--space-3);
  }
  .faq-trigger {
    min-height: 72px;
    padding: 20px 24px;
    gap: var(--space-4);
  }
  .answer-inner {
    padding: 0 24px 24px;
    line-height: 1.8;
  }
  .answer-inner p + p {
    margin-top: var(--space-4);
  }
  .support-row {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    gap: var(--space-6);
  }
  .support-row p {
    margin-top: var(--space-1);
  }
  body[data-page='home'] .hero {
    padding-top: 128px;
    padding-bottom: var(--layout-section);
  }
  body[data-page='home'] .hero-grid {
    gap: var(--space-10);
  }
  body[data-page='home'] .hero h1 {
    line-height: 1.24;
  }
  .hero-description {
    margin-top: var(--space-5);
    line-height: 1.8;
  }
  .hero-actions {
    gap: var(--space-3);
    margin-top: var(--space-6);
  }
  .hero-note {
    margin-top: var(--space-3);
  }
  body[data-page='home'] .proof {
    padding-block: var(--space-8);
  }
  .proof-grid {
    gap: var(--space-6);
  }
  .workflow-steps {
    gap: var(--space-6);
    margin-top: var(--space-6);
  }
  .workflow-steps li {
    gap: var(--space-3);
  }
  .workflow-steps p {
    margin-top: var(--space-2);
  }
  .scenario-grid {
    margin-top: var(--space-8);
  }
  .scenario {
    padding: var(--space-6);
  }
  .scenario-number {
    margin-bottom: var(--space-4);
  }
  .scenario p {
    margin-top: var(--space-3);
    line-height: 1.8;
  }
  .resources-grid {
    gap: var(--space-12);
  }
  .resources-title {
    margin-bottom: var(--space-6);
  }
  body[data-page='home'] .faq-item summary {
    padding-block: var(--space-5);
    min-height: 64px;
  }
  .faq-answer {
    padding: 0 24px 20px 0;
    line-height: 1.8;
  }
  .guide-content {
    padding-bottom: var(--space-5);
    line-height: 1.8;
  }
  .guide-content p + p {
    margin-top: var(--space-4);
  }
  #download-matrix .download-grid {
    gap: var(--layout-gap);
    margin-top: var(--space-8);
  }
  #download-matrix .download-card {
    padding: var(--layout-card);
  }
  .platform-specs {
    gap: var(--space-4);
    margin: var(--space-5) 0 var(--space-6);
    padding-top: var(--space-5);
  }
  .platform-specs dd {
    margin-top: var(--space-1);
    line-height: 1.65;
  }
  #download-matrix .download-action {
    min-height: 48px;
    padding: 12px;
  }
  #download-matrix .guide {
    margin-top: var(--space-6);
  }
  body[data-page='download'] .matrix-heading {
    gap: var(--space-6);
    margin-top: var(--space-10);
  }
  body[data-page='download'] .download-grid {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: var(--layout-gap);
    margin-top: var(--space-6);
  }
  body[data-page='download'] .download-card {
    gap: var(--space-6);
    padding: var(--layout-card);
  }
  body[data-page='download'] .card-bottom .button {
    min-height: 48px;
  }
  .gallery {
    margin-top: var(--space-16);
    padding-top: var(--space-10);
  }
  .gallery-heading {
    gap: var(--space-6);
    margin-bottom: var(--space-6);
  }
  .gallery-grid {
    gap: var(--layout-gap);
  }
  .steps {
    gap: var(--space-3) var(--space-6);
    margin-top: var(--space-6);
  }
  dialog {
    padding: var(--space-8);
  }
  dialog p {
    margin-top: var(--space-4);
    line-height: 1.8;
  }
  .dialog-actions {
    gap: var(--space-3);
    margin-top: var(--space-6);
  }
}
@media screen and (max-width: 1199px) {
  :root {
    --page-gutter: 24px;
    --layout-section: 64px;
    --layout-gap: 20px;
    --layout-report: 32px;
  }
  body[data-page='download'] .download-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .resources-grid {
    gap: var(--space-10);
  }
}
@media screen and (max-width: 899px) {
  body[data-page='download'] .download-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}
@media screen and (max-width: 767px) {
  :root {
    --page-gutter: 20px;
    --layout-section: 56px;
    --layout-page-top: 104px;
    --layout-bottom: 56px;
    --layout-gap: 16px;
    --layout-card: 20px;
    --layout-report: 24px;
    --layout-paragraph: 16px;
    --layout-chapter: 32px;
  }
  .nav {
    gap: var(--space-3);
  }
  .nav-links {
    gap: 4px;
    padding: 12px 20px 16px;
  }
  .nav-links a {
    min-height: 48px;
    padding: 10px 12px;
  }
  .section-heading {
    gap: var(--space-4);
    margin-bottom: var(--space-6);
  }
  .intro,
  .summary {
    margin-top: var(--space-5);
  }
  h1 {
    line-height: 1.45;
  }
  .eyebrow {
    margin-bottom: var(--space-3);
  }
  .site-footer {
    padding: var(--space-10) 0 var(--space-6);
  }
  .footer-top {
    gap: var(--space-6);
  }
  .footer-bottom {
    gap: var(--space-4);
    margin-top: var(--space-6);
    padding-top: var(--space-5);
  }
  .breadcrumb-wrap {
    padding-top: calc(var(--header-height) + var(--space-4));
  }
  .report {
    margin-top: var(--space-4);
  }
  .prose {
    margin-top: var(--space-6);
  }
  .prose h2 {
    margin-bottom: var(--space-4);
  }
  .prose h3 {
    margin-top: var(--space-5);
    margin-bottom: var(--space-3);
  }
  .toc ol {
    gap: var(--space-2) var(--space-4);
  }
  .references {
    padding-top: var(--space-5);
  }
  .download-cta {
    margin-top: var(--space-8);
  }
  .article-end {
    margin-top: var(--space-6);
    padding-top: var(--space-5);
  }
  .post-list,
  .faq-list {
    margin-top: var(--space-6);
  }
  .post-link {
    min-height: 112px;
    padding-block: var(--space-5);
    gap: var(--space-4);
  }
  .post-meta {
    gap: var(--space-3);
  }
  .topic-links {
    margin-top: var(--space-5);
    gap: var(--space-2);
  }
  .faq-trigger {
    min-height: 68px;
    padding: 18px 20px;
    gap: var(--space-3);
  }
  .answer-inner {
    padding: 0 20px 20px;
  }
  .support-row {
    gap: var(--space-5);
    margin-top: var(--space-6);
    padding-top: var(--space-5);
  }
  body[data-page='home'] .hero {
    padding-top: 112px;
  }
  body[data-page='home'] .hero-grid {
    gap: var(--space-8);
  }
  body[data-page='home'] .proof {
    padding-block: var(--space-6);
  }
  .proof-grid {
    gap: var(--space-4);
  }
  .workflow-steps {
    gap: var(--space-5);
  }
  .scenario-grid {
    margin-top: var(--space-6);
  }
  .scenario {
    padding: 20px 16px;
  }
  .resources-grid {
    gap: var(--space-8);
  }
  .resources-title {
    margin-bottom: var(--space-5);
  }
  .faq-answer {
    padding: 0 20px 20px 0;
  }
  #download-matrix .download-grid {
    margin-top: var(--space-6);
  }
  #download-matrix .download-card {
    padding: var(--layout-card);
  }
  .platform-specs {
    gap: var(--space-4);
    margin: var(--space-4) 0 var(--space-5);
    padding-top: var(--space-4);
  }
  body[data-page='download'] .matrix-heading {
    margin-top: var(--space-8);
    gap: var(--space-4);
  }
  body[data-page='download'] .download-grid {
    margin-top: var(--space-5);
  }
  .gallery {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
  }
  .gallery-heading {
    gap: var(--space-3);
    margin-bottom: var(--space-5);
  }
  .gallery-grid {
    gap: var(--space-6);
  }
  dialog {
    padding: 28px 24px;
  }
}
@media screen and (max-width: 639px) {
  body[data-page='download'] .download-grid {
    grid-template-columns: 1fr;
  }
  .platform-specs {
    grid-template-columns: 1fr;
  }
  .footer-top {
    gap: var(--space-6);
  }
}
@media screen and (max-width: 359px) {
  :root {
    --page-gutter: 16px;
    --layout-report: 20px;
  }
  .nav-links {
    padding-inline: 16px;
  }
  .faq-trigger {
    padding-inline: 16px;
  }
  .answer-inner {
    padding-inline: 16px;
  }
  .platform-specs {
    gap: var(--space-3);
  }
}

@media screen and (min-width: 1200px) and (max-width: 1279px) {
  #download-matrix .download-grid,
  body[data-page='download'] .download-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media screen {
  .download-faq {
    margin-top: var(--space-16);
    padding-top: var(--space-10);
    border-top: 1px solid var(--line);
  }
  .download-faq-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-6);
  }
  .download-faq-heading .eyebrow {
    margin-bottom: var(--space-3);
  }
  .download-faq-heading h2 {
    font-size: clamp(1.5rem, 2.2vw, 1.75rem);
    font-weight: 650;
    line-height: 1.45;
    letter-spacing: -0.02em;
  }
  .download-faq-all {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    min-height: 44px;
    padding-block: 8px;
    color: var(--blue-hover);
    font-size: var(--text-small);
    font-weight: 600;
    line-height: 1.6;
  }
  .download-faq-all .icon {
    width: 17px;
    height: 17px;
    transition: transform 0.2s ease;
  }
  .download-faq-all:hover .icon {
    transform: translateX(3px);
  }
  .download-faq-list {
    margin-top: var(--space-6);
  }
  .download-faq-item {
    border-bottom: 1px solid var(--line);
  }
  .download-faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
    min-height: 72px;
    padding: 20px 0;
    list-style: none;
    cursor: pointer;
  }
  .download-faq-item summary::-webkit-details-marker {
    display: none;
  }
  .download-faq-item summary::marker {
    content: '';
  }
  .download-faq-item summary h3 {
    min-width: 0;
    margin: 0;
    color: var(--ink);
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.7;
    letter-spacing: 0;
  }
  .download-faq-chevron {
    width: 18px;
    height: 18px;
    color: var(--muted);
    transition: transform 0.2s ease;
  }
  .download-faq-item[open] .download-faq-chevron {
    transform: rotate(180deg);
  }
  .download-faq-answer {
    padding: 0 40px 24px 0;
    font-size: var(--text-body);
    line-height: 1.8;
    color: var(--body);
    overflow-wrap: anywhere;
  }
  .download-faq-answer p {
    margin: 0;
  }
  .download-faq-more {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    margin-top: 8px;
    padding-block: 8px;
    color: var(--blue-hover);
    font-size: var(--text-small);
    font-weight: 500;
    line-height: 1.6;
  }
  .download-faq-all:hover,
  .download-faq-more:hover {
    text-decoration: underline;
    text-underline-offset: 4px;
  }
}
@media screen and (max-width: 767px) {
  .download-faq {
    margin-top: var(--space-12);
    padding-top: var(--space-8);
  }
  .download-faq-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-3);
  }
  .download-faq-list {
    margin-top: var(--space-5);
  }
  .download-faq-item summary {
    min-height: 68px;
    gap: var(--space-4);
    padding: 18px 0;
  }
  .download-faq-item summary h3 {
    font-size: var(--text-body);
  }
  .download-faq-answer {
    padding: 0 24px 20px 0;
  }
}
@media (prefers-reduced-motion: reduce) {
  .download-faq-chevron,
  .download-faq-all .icon {
    transition: none;
  }
  .download-faq-all:hover .icon {
    transform: none;
  }
}
@media (forced-colors: active) {
  .download-faq-item {
    border-bottom: 1px solid CanvasText;
  }
}