:root {
  color-scheme: light;
  --ink: var(--ds-text-primary, #242424);
  --text-muted: var(--ds-text-secondary, #666);
  --paper: var(--ds-bg-subtle, #f5f5f5);
  --surface: var(--ds-bg-subtle, #f6f6f6);
  --line: var(--ds-border-subtle, #e6e6e6);
  --header-clearance: 96px;
  font-family: var(--keepdrop-font-brand);
  color: var(--ink);
  background: var(--ds-bg-canvas, #fff);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}
* { box-sizing: border-box; }
html { scroll-padding-top: var(--header-clearance); }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 5px; }
button { font: inherit; cursor: pointer; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 5px;
}
img { display: block; max-width: 100%; height: auto; }
figure, p, h1, h2, h3 { margin: 0; }
p { line-height: 1.6; }
h1, h2 { font-weight: 600; letter-spacing: -.045em; line-height: 1.08; }
h2 { font-size: clamp(34px, 3.5vw, 48px); }
.wrap { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.site-header.wrap {
  width: 100%; max-width: none; position: sticky; top: 0; z-index: 5;
  min-height: 72px; margin: 0; padding: 12px max(48px, calc((100% - 1200px) / 2));
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  border-bottom: 1px solid var(--line); background: var(--header-bg, rgb(255 255 255 / 92%));
  -webkit-backdrop-filter: blur(20px); backdrop-filter: blur(20px);
}
.site-header .wordmark { font-size: 19px; flex-shrink: 0; }
.site-header nav { gap: 12px; }
.site-header nav a { min-height: 40px; display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; border-radius: 8px; line-height: 1; white-space: nowrap; }
.site-header nav a:not(.nav-release) { color: var(--text-muted); }
.site-header nav a:not(.nav-release):hover { color: var(--ink); background: var(--surface); text-decoration: none; }
.site-header nav .nav-release { padding-inline: 18px; border-radius: 999px; }
.site-header nav .language-switch { width: 40px; height: 40px; padding: 0; border-radius: 50%; border: 1px solid var(--line); flex-shrink: 0; }
.language-switch svg { display: block; }
@media (prefers-reduced-transparency: reduce) {
  .site-header.wrap { background: var(--ds-bg-canvas, #fff); -webkit-backdrop-filter: none; backdrop-filter: none; }
}
.wordmark { display: inline-flex; align-items: center; gap: .35em; font-size: 21px; font-weight: 600; letter-spacing: -.02em; }
.brand-on-dark { display: none; }
.wordmark img { height: .85em; width: auto; }
.wordmark .brand-lockup { height: 26px; width: auto; max-width: 132px; }
nav { display: flex; gap: 32px; align-items: center; font-size: 14px; }
nav a { padding-block: 12px; }
nav .nav-release { padding: 11px 18px; border-radius: 999px; background: var(--ink); color: var(--primary-foreground, #fff); font-weight: 500; }
.nav-release:hover { background: var(--ds-action-hover, #414141); text-decoration: none; }
.hero { padding-top: 68px; }
.hero-copy { text-align: center; }
.eyebrow { font-size: 14px; font-weight: 500; letter-spacing: 0; margin-bottom: 22px; color: var(--text-muted); }
h1 { font-size: clamp(44px, 5.5vw, 76px); line-height: 1.1; }
.soft { color: var(--text-muted); }
.intro { max-width: 490px; margin: 25px auto 0; color: var(--text-muted); font-size: 18px; line-height: 1.55; }
.hero-actions { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; margin-top: 24px; }
.button { background: var(--ink); color: var(--primary-foreground, #fff); border-radius: 999px; padding: 14px 22px; font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; justify-content: center; gap: 12px; }
.apple-logo { width: 18px; height: 20px; flex: none; }
.button:hover { background: var(--ds-action-hover, #414141); text-decoration: none; }
.availability { font-size: 12px; color: var(--text-muted); }
.capture { width: 100%; border-radius: 8px; border: 1px solid var(--line); }
figcaption { display: flex; justify-content: space-between; gap: 12px; font-size: 12px; color: var(--text-muted); line-height: 1.5; margin-top: 16px; }
.feature { margin-top: 128px; display: grid; grid-template-columns: minmax(0, .75fr) minmax(0, 1.6fr); gap: 64px; align-items: center; }
.feature-heading { display: flex; flex-direction: column; gap: 22px; }
.feature-heading .eyebrow { margin-bottom: 18px; color: var(--ink); }
.feature-copy { max-width: 350px; color: var(--text-muted); font-size: 16px; }
.feature figure { min-width: 0; }
.feature figure > a { display: block; border-radius: 8px; }
.feature#focus { grid-template-columns: minmax(0, 1.6fr) minmax(0, .75fr); }
.feature#focus .feature-heading { grid-column: 2; grid-row: 1; }
.feature#focus figure { grid-column: 1; grid-row: 1; }
.small { font-size: 12px; color: var(--text-muted); }
h3 { font-size: 20px; letter-spacing: -.025em; font-weight: 600; margin-bottom: 14px; }
.faq { display: grid; grid-template-columns: minmax(0, 1fr); gap: 48px; padding-block: 104px; scroll-margin-top: 20px; }
.faq h2 { font-size: 40px; text-align: center; }
.faq > .questions { width: 100%; max-width: 760px; margin-inline: auto; }
.questions { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; padding: 24px 32px 24px 0; font-size: 16px; font-weight: 500; list-style: none; position: relative; line-height: 1.5; }
summary::-webkit-details-marker { display: none; }
summary::after { content: ''; position: absolute; right: 6px; top: 29px; width: 8px; height: 8px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; color: var(--text-muted); transform: rotate(45deg); transition: transform 160ms ease; }
details[open] summary::after { transform: rotate(225deg); }
details p { padding: 0 32px 24px 0; font-size: 15px; color: var(--text-muted); max-width: 630px; }
.download { text-align: center; padding: 72px 24px; scroll-margin-top: 24px; }
.download img { margin: 0 auto 28px; width: 104px; }
.download h2 { font-size: clamp(40px, 4.5vw, 60px); }
.download > p:not(.eyebrow) { margin-top: 20px; color: var(--text-muted); }
.download-button { margin-top: 28px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.download .small { margin-top: 8px !important; }
footer { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding-block: 44px; font-size: 12px; color: var(--text-muted); }
footer > a:last-child { padding: 12px 0; }
.skip { position: fixed; top: 10px; left: 10px; background: var(--ds-bg-canvas, #fff); padding: 14px; z-index: 10; transform: translateY(-150%); }
.skip:focus { transform: none; }
@media (max-width: 1000px) {
  .wrap { width: calc(100% - 64px); }
  .feature { gap: 36px; }
  .feature h2 { font-size: 36px; }
}
@media (max-width: 760px) {
  :root { --header-clearance: 88px; }
  .wrap { width: calc(100% - 40px); }
  .wordmark { font-size: 19px; }
  nav { gap: 16px; font-size: 12px; }
  nav .nav-release { padding: 11px 13px; }
  .hero { padding-top: 44px; }
  h1 { font-size: clamp(34px, 7.9vw, 56px); letter-spacing: -.047em; }
  .eyebrow { font-size: 12px; }
  .intro { font-size: 16px; max-width: 370px; margin-top: 23px; }
  .capture { border-radius: 5px; }
  figcaption { font-size: 10px; flex-direction: column; gap: 3px; margin-top: 12px; }
  .feature { margin-top: 76px; display: flex; flex-direction: column; align-items: stretch; gap: 26px; }
  .feature-heading { gap: 18px; }
  .feature-heading .eyebrow { margin-bottom: 13px; }
  .feature-copy { max-width: 470px; font-size: 16px; }
  .feature h2, h2 { font-size: 36px; }
  .feature figure > a { border-radius: 5px; }
  h3 { font-size: 19px; margin-bottom: 10px; }
  .faq { grid-template-columns: 1fr; gap: 30px; padding-block: 68px; }
  .faq h2 { font-size: 36px; }
  summary { font-size: 15px; }
  .download { padding: 52px 20px; }
  .download h2 { font-size: 40px; }
  footer { flex-wrap: wrap; gap: 18px; padding-block: 32px; }
  footer p { order: 3; width: 100%; font-size: 11px; }
}
@media (max-width: 360px) {
  h1 { font-size: 30px; }
  nav { gap: 10px; }
  .wordmark { font-size: 17px; }
  .download h2 { font-size: 35px; }
}
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
}

/* Screenshot viewer: original media, with native modal focus and Escape support. */
.viewer-open { overflow: hidden; }
.image-viewer { width: min(1460px, calc(100% - 48px)); max-width: none; max-height: calc(100dvh - 48px); padding: 0; border: 1px solid var(--line); border-radius: 12px; background: var(--ds-bg-canvas, #fff); color: var(--ink); }
.image-viewer::backdrop { background: rgb(0 0 0 / 65%); }
.viewer-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 12px 20px; border-bottom: 1px solid var(--line); }
.viewer-toolbar h2 { font-size: 16px; font-weight: 500; letter-spacing: -.02em; }
.viewer-actions { display: flex; align-items: center; gap: 8px; }
.viewer-actions form { margin: 0; }
.viewer-actions button { min-height: 44px; border: 0; border-radius: 999px; background: var(--surface); color: var(--ink); padding: 10px 16px; font-size: 13px; }
.viewer-close span { margin-left: 8px; font-size: 18px; }
.viewer-canvas { overflow: auto; max-height: calc(100dvh - 130px); padding: 20px; overscroll-behavior: contain; }
.viewer-image { margin: auto; width: auto; max-width: 100%; max-height: calc(100dvh - 170px); object-fit: contain; }
.is-zoomed .viewer-image { width: 1346px; height: 768px; max-width: none; max-height: none; }
figure > a[aria-haspopup] { cursor: zoom-in; }
#main:focus { outline: none; }
@media (max-width: 760px) {
  nav a { min-height: 44px; display: inline-flex; align-items: center; }
  .image-viewer { width: calc(100% - 20px); max-height: calc(100dvh - 20px); }
  .viewer-toolbar { padding: 8px 10px; gap: 6px; }
  .viewer-toolbar h2 { font-size: 13px; }
  .viewer-actions { gap: 4px; }
  .viewer-actions button { font-size: 11px; padding: 10px 12px; }
  .viewer-canvas { padding: 10px; max-height: calc(100dvh - 94px); }
  .viewer-image { max-height: calc(100dvh - 114px); }
}
.not-found { min-height: 100dvh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; gap: 24px; padding-block: 48px; }
.not-found .wordmark { margin-bottom: 40px; }
.not-found .eyebrow { margin: 0; }
.not-found > p { color: var(--text-muted); }
.not-found h1 { font-size: clamp(34px, 5vw, 64px); }
.viewer-actions button { white-space: nowrap; }


/* Encoded launch film with native controls. */
.hero h1 { font-size: clamp(42px, 5vw, 68px); }
.product-film { margin-top: 44px; scroll-margin-top: 24px; }
.film-screen { border-radius: 14px; overflow: hidden; background: var(--surface); border: 1px solid var(--line); }
.film-video { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; }
.film-video:focus-visible { outline: 2px solid var(--ink); outline-offset: -3px; }
.film-status { margin-top: 12px; color: var(--text-muted); font-size: 13px; }
@media (max-width: 760px) {
  .hero h1 { font-size: clamp(30px, 7.9vw, 56px); }
  .product-film { margin-top: 34px; }
  .film-screen { border-radius: 8px; }
}

/* Release and help content shares the quiet typography of the homepage. */
.resources { display: grid; grid-template-columns: .75fr 1.6fr; gap: 64px; padding-bottom: 100px; }
.resource-links { border-top: 1px solid var(--line); }
.resource-links > a { display: block; padding: 25px 0; border-bottom: 1px solid var(--line); }
.resource-links > a:hover { text-decoration: none; }
.resource-links > a:hover h3 { text-decoration: underline; text-underline-offset: 5px; }
.resource-links h3 { display: flex; justify-content: space-between; gap: 18px; }
.resource-links p { color: var(--text-muted); font-size: 15px; }
.site-footer { flex-wrap: wrap; justify-content: center; gap: 12px 28px; }
.site-footer .copyright { width: auto; order: 0; margin: 0; text-align: center; font-size: 12px; white-space: nowrap; }
.site-footer nav { width: auto; justify-content: center; flex-wrap: wrap; gap: 8px 28px; font-size: 12px; }
.site-footer nav a { display: inline-flex; min-height: 44px; align-items: center; }
.doc-main { padding-top: 64px; padding-bottom: 80px; }
.doc-heading { max-width: 840px; margin-bottom: 46px; }
.doc-heading h1 { font-size: clamp(38px, 5vw, 66px); }
.doc-intro { font-size: 19px; color: var(--text-muted); margin-top: 24px; max-width: 650px; }
.draft-note { max-width: 840px; padding: 22px 26px; border-left: 2px solid var(--ink); background: var(--surface); margin-bottom: 48px; font-size: 14px; }
.draft-note strong { display: block; margin-bottom: 6px; font-weight: 500; }
.draft-note p { color: var(--text-muted); }
.doc-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); gap: 80px; align-items: start; }
.doc-toc { position: sticky; top: var(--header-clearance); display: flex; flex-direction: column; align-items: stretch; gap: 0; font-size: 14px; }
.doc-toc .eyebrow { margin-bottom: 12px; }
.doc-toc a { padding: 12px 0; border-bottom: 1px solid var(--line); }
.doc-section { padding: 36px 0; border-top: 1px solid var(--line); scroll-margin-top: 32px; }
.doc-section h2 { font-size: clamp(27px, 3vw, 34px); margin-bottom: 24px; }
.doc-section h3 { margin-top: 26px; }
.doc-section p, .doc-section li, .doc-section dd { font-size: 16px; line-height: 1.75; color: var(--text-muted); }
.doc-section p + p { margin-top: 16px; }
.doc-section a:not(.button), .questions p a { text-decoration: underline; text-underline-offset: 4px; }
.doc-section ul, .doc-section ol { padding-left: 24px; margin-block: 20px; }
.doc-section li + li { margin-top: 12px; }
.doc-section .pending { font-size: 14px; padding: 18px 20px; margin-top: 24px; background: var(--surface); border-radius: 6px; }
.pending strong { font-weight: 500; color: var(--ink); }
.guide-capture { margin: 28px 0; }
.guide-capture img { border: 1px solid var(--line); border-radius: 6px; }
.guide-capture figcaption { display: block; }
.fact-list { margin: 0; }
.fact-list > div { display: grid; grid-template-columns: 155px minmax(0, 1fr); gap: 24px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.fact-list dt { font-size: 14px; font-weight: 500; line-height: 1.75; }
.fact-list dd { margin: 0; }
.media-placeholder { padding: 30px; background: var(--surface); border: 1px dashed var(--line); border-radius: 8px; margin-bottom: 24px; }
.media-placeholder h3 { margin-top: 0; }
.media-placeholder .eyebrow { font-size: 12px; }
.doc-section .small { font-size: 13px; }
.copy-block { font: 13px/1.9 var(--keepdrop-font-brand); white-space: pre-wrap; overflow-wrap: anywhere; background: var(--surface); padding: 24px; border-radius: 6px; }
.status-label { color: var(--ink) !important; margin-bottom: 20px; }
.doc-section .press-tagline { font-size: clamp(30px, 4vw, 48px); line-height: 1.15; letter-spacing: -.035em; color: var(--ink); margin-bottom: 32px; }
.brand-assets { display: flex; flex-wrap: wrap; gap: 32px 64px; margin: 28px 0; }
.brand-assets figure { min-width: 160px; }
.brand-assets img { height: 96px; width: auto; object-fit: contain; padding: 12px; }
.brand-assets figcaption { display: block; }
.guide-paths { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin: 26px 0; }
.guide-paths article { padding: 24px; background: var(--surface); border-radius: 8px; }
.guide-paths h3 { margin-top: 0; }
.guide-paths a { display: inline-block; padding-block: 12px; margin-top: 12px; font-size: 14px; }
.guide-note, .guide-result { border-left: 2px solid var(--text-muted); padding: 16px 20px; margin-block: 24px; background: var(--surface); }
.guide-note p { margin: 0; }
.guide-note strong, .guide-result strong, .guide-steps strong { color: var(--ink); font-weight: 500; }
.guide-steps li { padding-left: 6px; }
.guide-steps li + li { margin-top: 18px; }
.menu-path { font-weight: 500; color: var(--ink); }
.guide-main kbd { font-family: inherit; font-size: 13px; white-space: nowrap; background: var(--surface); border: 1px solid var(--line); border-radius: 4px; padding: 2px 6px; color: var(--ink); }
.guide-shortcuts { width: 100%; border-collapse: collapse; margin-top: 24px; }
.guide-shortcuts caption { text-align: left; color: var(--text-muted); font-size: 13px; margin-bottom: 12px; }
.guide-shortcuts th, .guide-shortcuts td { text-align: left; border-bottom: 1px solid var(--line); padding: 18px 12px 18px 0; line-height: 1.6; vertical-align: top; font-size: 15px; }
.guide-shortcuts th { font-weight: 500; }
.guide-shortcuts tbody th { width: 112px; white-space: nowrap; }
.guide-shortcuts td { color: var(--text-muted); }
.guide-film video { border: 1px solid var(--line); border-radius: 8px; }
.guide-next { margin-top: 24px; }
@media (max-width: 1000px) {
  .doc-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 40px; }
}
@media (max-width: 760px) {
  .resources { grid-template-columns: 1fr; gap: 30px; padding-bottom: 68px; }
  .resources h2 { font-size: 34px; }
  .site-footer p { order: 0; }
  .site-footer { gap: 6px 16px; }
  .site-footer nav { gap: 4px 16px; }
  .site-footer nav, .site-footer .copyright { font-size: 11px; }
  .doc-main { padding-top: 38px; padding-bottom: 40px; }
  .doc-heading { margin-bottom: 30px; }
  .doc-intro { font-size: 17px; margin-top: 20px; }
  .doc-layout { display: block; }
  .doc-toc { position: static; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; margin-bottom: 36px; font-size: 13px; }
  .doc-toc .eyebrow { grid-column: 1 / -1; }
  .doc-toc > a:first-of-type { display: inline-flex; }
  .doc-section { padding-block: 30px; }
  .draft-note { padding: 18px 20px; margin-bottom: 32px; }
  .fact-list > div { grid-template-columns: 1fr; gap: 6px; }
  .media-placeholder { padding: 24px 20px; }
  .copy-block { padding: 18px; }
  .guide-paths { grid-template-columns: 1fr; gap: 12px; }
  .guide-paths article { padding: 22px 20px; }
}

/* Keep all navigation actions available on narrow screens. */
@media (max-width: 760px) {
  .site-header.wrap { padding: 10px 20px; min-height: 64px; gap: 12px; }
  .site-header nav { gap: 6px; }
  .site-header nav a { padding-inline: 10px; }
  .download img { width: 88px; }
}
@media (max-width: 420px) {
  .site-header.wrap { padding-inline: 12px; gap: 8px; }
  .site-header .wordmark { font-size: 16px; }
  .site-header nav { gap: 4px; }
  .site-header nav a { font-size: 12px; padding-inline: 8px; }
  .site-header nav .nav-release { padding-inline: 10px; }
}
@media (prefers-reduced-motion: reduce) { summary::after { transition: none; } }
:lang(zh-CN) h1, :lang(zh-CN) h2, :lang(zh-CN) h3 { letter-spacing: -.025em; line-height: 1.25; }
:lang(zh-CN) .hero h1 { font-size: clamp(38px, 4.8vw, 62px); }
:lang(zh-CN) .feature-copy, :lang(zh-CN) .doc-intro { line-height: 1.85; }
@media (max-width: 760px) {
  :lang(zh-CN) .hero h1 { font-size: clamp(29px, 7.7vw, 48px); }
}