@font-face {
  font-family: Inter;
  src: url('assets/Inter-Medium.ttf') format('truetype');
  font-weight: 500;
  font-display: swap;
}
:root {
  --carbon: #111111;
  --paper: #f5f5f5;
  --muted: #626262;
  --line: #d7d7d7;
  --gutter: clamp(24px, 6vw, 88px);
  --inset: max(var(--gutter), calc((100% - 1280px) / 2));
  --display: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; background: var(--paper); color: var(--carbon); font: 400 16px/1.7 -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
img { display: block; max-width: 100%; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-family: var(--display); font-weight: 500; }
a, button, summary { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible, summary:focus-visible, .photo-strip:focus-visible { outline: 2px solid currentColor; outline-offset: 6px; }
.skip { clip-path: inset(50%); position: fixed; z-index: 100; background: var(--paper); padding: 12px 20px; top: 0; left: 20px; transform: translateY(-130%); }
.skip:focus { clip-path: none; transform: none; }
.header { height: 88px; position: absolute; inset: 0 0 auto; z-index: 10; display: flex; align-items: center; justify-content: space-between; padding-inline: var(--inset); color: var(--paper); background: linear-gradient(180deg, #111111db, #111111a3 75%, #11111100); }
.signature { display: flex; align-items: center; gap: 10px; font-family: var(--display); font-size: 20px; letter-spacing: -.6px; }
.signature img { width: 36px; height: 36px; }
.header nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 500; }
.header nav a { padding-block: 12px; border-bottom: 1px solid transparent; transition: border-color .2s; }
.header nav a:hover { border-color: #f5f5f5; }
.language { border: 1px solid #ffffff66; border-radius: 4px; background: #11111140; min-height: 44px; min-width: 56px; padding: 8px 12px; font-size: 13px; font-weight: 500; transition: background .2s; }
.language:hover { background: #11111180; }
.hero { position: relative; display: flex; align-items: center; min-height: min(800px, 100svh); padding: 128px var(--inset) 96px; overflow: hidden; color: var(--paper); background: var(--carbon); }
.hero-photo { position: absolute; inset: 0 0 0 34%; overflow: hidden; }
.hero-photo img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 0; animation: photo-in 1.1s ease-out both; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, #111 0%, #111 36%, #111111e8 44%, #11111140 66%, #11111100 82%), linear-gradient(0deg, #11111188, #11111100 32%); }
.hero-content { position: relative; z-index: 2; max-width: 640px; }
.eyebrow { font-size: 12px; font-weight: 500; line-height: 1.6; letter-spacing: 1.2px; text-transform: uppercase; }
.hero .eyebrow { color: #dedede; animation: text-in .65s .08s both; }
.hero h1 { font-size: clamp(72px, 8.5vw, 126px); line-height: 1.05; letter-spacing: -.06em; margin: 22px 0 20px; animation: text-in .65s .16s both; }
.hero-promise { font: 500 clamp(32px, 3.6vw, 50px)/1.18 var(--display); letter-spacing: -.045em; animation: text-in .65s .24s both; }
.hero-description { max-width: 360px; font-size: 17px; line-height: 1.7; color: #dedede; margin: 24px 0 28px; text-wrap: pretty; animation: text-in .65s .32s both; }
.button { max-width: 100%; display: inline-flex; align-items: center; justify-content: space-between; gap: 36px; min-height: 54px; padding: 14px 24px; border: 1px solid transparent; border-radius: 4px; font-size: 14px; font-weight: 500; transition: background .2s, transform .2s; }
.button > span:first-child { min-width: 0; }
.button span:last-child { font-size: 19px; line-height: 1; }
.button:hover { transform: translateY(-2px); }
.button-light { background: var(--paper); color: var(--carbon); }
.button-light:hover { background: #fff; }
.button-dark { background: var(--carbon); color: var(--paper); }
.button-dark:hover { background: #333; }
.hero .button { animation: text-in .65s .4s both; }
.availability-link { display: block; width: fit-content; font-size: 13px; color: #dedede; margin-top: 12px; padding-block: 4px; animation: text-in .65s .48s both; }
.availability-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.hero-bottom { position: absolute; inset: auto var(--inset) 22px; z-index: 2; display: flex; align-items: center; gap: 16px; font-size: 12px; color: #dedede; }
.hero-bottom a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; font-size: 25px; }
.section { padding: 112px var(--inset); }
.section h2 { font-size: clamp(34px, 4vw, 54px); line-height: 1.18; letter-spacing: -.045em; white-space: pre-line; text-wrap: balance; }
.guide.section { padding-top: 80px; }
.section-heading { display: grid; grid-template-columns: 1.15fr 1fr; column-gap: 9%; align-items: end; margin-bottom: 56px; }
.section-heading .eyebrow { grid-column: 1 / -1; margin-bottom: 18px; }
.section-heading > p:last-child { max-width: 440px; font-size: 16px; color: var(--muted); }
.guide-layout { display: grid; grid-template-columns: minmax(280px, .95fr) minmax(320px, 1.05fr); gap: clamp(48px, 9vw, 128px); align-items: center; }
.guide-demo { position: relative; max-width: 448px; padding: 12px; background: var(--carbon); color: var(--paper); border-radius: 12px; border: 1px solid #202020; }
.demo-viewfinder { position: relative; width: 100%; aspect-ratio: 3/4; overflow: hidden; background: #333; border-radius: 5px; }
.demo-viewfinder > img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 0; transition: transform .6s ease; }
.guide-demo[data-stage="1"] .demo-viewfinder > img { transform: scale(1.05); }
.guide-demo[data-stage="2"] .demo-viewfinder > img { transform: scale(1.1); }
.guide-demo[data-stage="3"] .demo-viewfinder > img { transform: scale(1.14); }
.guide-demo[data-stage="4"] .demo-viewfinder > img { transform: scale(1.2); }
.demo-viewfinder:after { content: ''; position: absolute; inset: 0; pointer-events: none; background: linear-gradient(180deg, #111111e0, #11111180 12%, #11111100 28%); }
.demo-top { position: absolute; z-index: 2; top: 18px; left: 18px; right: 18px; display: flex; justify-content: space-between; font-size: 12px; font-weight: 500; }
.demo-grid { position: absolute; inset: 0; opacity: .4; background: linear-gradient(90deg, transparent 33.1%, #fff 33.1%, #fff 33.3%, transparent 33.3%, transparent 66.4%, #fff 66.4%, #fff 66.6%, transparent 66.6%), linear-gradient(0deg, transparent 33.1%, #fff 33.1%, #fff 33.3%, transparent 33.3%, transparent 66.4%, #fff 66.4%, #fff 66.6%, transparent 66.6%); }
.focus-frame { position: absolute; top: 16%; left: 34%; width: 30%; height: 25%; border: 1px solid #ffffffaa; transition: transform .6s; }
.guide-demo[data-stage="1"] .focus-frame { transform: translate(5%, 10%); }
.guide-demo[data-stage="2"] .focus-frame { transform: scale(1.2); }
.guide-demo[data-stage="3"] .focus-frame { transform: translateY(30%); }
.guide-demo[data-stage="4"] .focus-frame { transform: translateY(-12%) scale(.8); }
.demo-bottom { display: flex; align-items: start; gap: 20px; padding: 24px 12px 14px; }
.demo-bottom > span:first-child { flex: 1; min-width: 0; font-size: 20px; line-height: 1.55; font-weight: 500; letter-spacing: -.02em; }
.demo-step { flex-shrink: 0; white-space: nowrap; padding-top: 5px; font-size: 12px; font-variant-numeric: tabular-nums; color: #bdbdbd; }
.demo-label { font-size: 12px; color: #bdbdbd; padding: 0 12px 10px; }
.step { display: grid; grid-template-columns: 28px 1fr 20px; align-items: start; gap: 16px; width: 100%; padding: 25px 0; background: transparent; border: 0; border-top: 1px solid var(--line); text-align: left; position: relative; }
.step-number { font-size: 12px; color: var(--muted); padding-top: 6px; font-variant-numeric: tabular-nums; }
.step strong { display: block; font: 500 23px/1.4 var(--display); letter-spacing: -.025em; }
.step-copy { display: block; max-height: 0; overflow: hidden; opacity: 0; font-size: 15px; line-height: 1.7; color: var(--muted); margin: 0; transition: max-height .25s, opacity .25s, margin .25s; }
.step.active .step-copy { max-height: 32em; margin-top: 10px; opacity: 1; }
.step.active .step-number { color: var(--carbon); font-weight: 600; }
.step:before { content: ''; width: 2px; position: absolute; inset: 24px auto 24px -16px; background: var(--carbon); opacity: 0; transition: opacity .2s; }
.step.active:before { opacity: 1; }
.step-arrow { opacity: 0; font-size: 21px; padding-top: 2px; transition: opacity .2s; }
.step.active .step-arrow, .step:hover .step-arrow { opacity: 1; }
.fine-print { font-size: 13px; line-height: 1.7; color: var(--muted); margin-top: 24px; }
.references { padding-top: 20px; }
.reference-heading { display: grid; grid-template-columns: 1.15fr 1fr; gap: 9%; align-items: end; margin-bottom: 48px; }
.reference-heading h2 { margin-top: 18px; }
.reference-heading > p { max-width: 440px; font-size: 16px; color: var(--muted); }
.photo-strip { display: grid; grid-template-columns: 1.14fr 1fr 1fr; gap: 24px; align-items: start; }
.photo-strip figure:nth-child(2) { padding-top: 48px; }
.photo-strip figure:last-child { padding-top: 96px; }
.photo { overflow: hidden; aspect-ratio: 2/3; background: #ddd; }
.photo-strip figure:first-child .photo { aspect-ratio: 2/3; }
.photo img { width: 100%; height: 100%; object-fit: cover; object-position: 50% 28%; transition: transform .65s ease; }
.photo:hover img { transform: scale(1.035); }
figcaption { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
figcaption > span:last-child { font-size: 12px; color: var(--muted); font-variant-numeric: tabular-nums; }
.gallery-help { display: none; }
.image-note { margin-top: 24px; max-width: 780px; }
.privacy { background: var(--carbon); color: var(--paper); display: grid; grid-template-columns: 1.15fr 1fr; gap: 9%; }
.privacy .eyebrow { color: #bdbdbd; }
.privacy h2 { margin: 22px 0 28px; }
.text-link { display: inline-flex; align-items: center; gap: 30px; min-height: 44px; padding: 8px 0; border-bottom: 1px solid #888; font-size: 14px; }
.text-link:hover { border-color: var(--paper); }
.privacy-points > div { padding: 0 0 26px 36px; border-bottom: 1px solid #ffffff33; margin-bottom: 26px; position: relative; }
.privacy-points > div:last-child { margin-bottom: 0; }
.point-number { position: absolute; left: 0; top: 4px; font-size: 12px; color: #bdbdbd; }
.privacy-points h3 { font-size: 22px; line-height: 1.5; letter-spacing: -.025em; margin-bottom: 10px; }
.privacy-points p { font-size: 15px; line-height: 1.7; color: #bdbdbd; max-width: 430px; }
.availability { display: grid; grid-template-columns: 1.15fr 1fr; gap: 9%; align-items: center; }
.launch > img { margin-bottom: 28px; }
.launch h2 { margin: 20px 0 24px; }
.launch > p:not(.eyebrow) { max-width: 440px; font-size: 16px; color: var(--muted); }
.launch .button { margin-top: 28px; }
.faq > h3 { font-size: 17px; padding-bottom: 26px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; font-size: 15px; font-weight: 500; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px 0; }
summary::-webkit-details-marker { display: none; }
summary:after { content: '+'; font-size: 22px; line-height: 1; font-weight: 400; flex-shrink: 0; }
details[open] summary:after { content: '−'; }
.faq p { font-size: 15px; line-height: 1.75; color: var(--muted); padding: 0 24px 24px 0; }
.faq p a { text-decoration: underline; text-underline-offset: 3px; }
footer { border-top: 1px solid var(--line); padding: 28px var(--inset); display: flex; align-items: center; gap: 30px; font-size: 13px; }
footer > span { color: var(--muted); }
.footer-brand { font-size: 15px; font-weight: 500; }
footer nav { display: flex; flex-wrap: wrap; gap: 24px; margin-left: auto; }
footer nav a { display: inline-flex; align-items: center; min-height: 44px; }
.reveal { opacity: 1; }
.motion-ready .reveal { opacity: 0; transform: translateY(20px); transition: opacity .65s, transform .65s; }
.motion-ready .reveal.visible { opacity: 1; transform: none; }
html[lang='zh-Hans'] .hero-promise, html[lang='zh-Hans'] h2 { letter-spacing: -.02em; }
html[lang='zh-Hans'] .step strong { letter-spacing: 0; }
@keyframes text-in { from { opacity: 0; translate: 0 12px; } to { opacity: 1; translate: 0 0; } }
@keyframes photo-in { from { opacity: .3; transform: scale(1.04); } to { opacity: 1; transform: scale(1); } }
@media (max-width: 1000px) {
  .hero { min-height: min(800px, 100svh); }
  .hero-content { max-width: 560px; }
  .hero h1 { font-size: clamp(68px, 9vw, 90px); }
  .hero-description { max-width: 290px; }
  .hero-photo { left: 24%; }
  .hero-shade { background: linear-gradient(90deg, #111 0%, #111 27%, #111111c9 42%, #11111100 88%); }
  .header nav { gap: 20px; font-size: 13px; }
  .section { padding-block: 88px; }
  .section-heading, .reference-heading, .privacy, .availability { column-gap: 6%; }
  .section h2 { font-size: 42px; }
  .guide-layout { gap: 40px; }
  .step { padding-block: 22px; }
  .step strong { font-size: 20px; }
  .demo-bottom > span:first-child { font-size: 18px; }
  .references { padding-top: 10px; }
}
@media (max-width: 740px) {
  .header { height: 76px; }
  .signature { font-size: 18px; gap: 7px; }
  .signature img { width: 30px; height: 30px; }
  .header nav > a { display: none; }
  .hero { min-height: min(880px, 100svh); padding: 128px var(--gutter) 84px; align-items: flex-end; }
  .hero-photo { inset: 0; }
  .hero-photo img { object-position: 54% 18%; }
  .hero-shade { background: linear-gradient(0deg, #111 0%, #111111f5 10%, #111111bf 38%, #1111111a 67%, #11111100 80%); }
  .hero-content { max-width: none; width: 100%; }
  .hero-content:before { content: ""; position: absolute; z-index: -1; inset: -32px calc(-1 * var(--gutter)) -24px; background: linear-gradient(180deg, #11111100, #111111c9 32px, #111111e8 80%); pointer-events: none; }
  .hero .eyebrow { font-size: 12px; letter-spacing: .7px; }
  .hero h1 { font-size: clamp(54px, 15.2vw, 94px); margin: 14px 0 12px; letter-spacing: -.055em; }
  .hero-promise { font-size: 34px; letter-spacing: -.04em; }
  .hero-description { font-size: 15px; max-width: 340px; line-height: 1.7; margin: 18px 0 24px; }
  .button { min-height: 52px; font-size: 14px; padding: 12px 20px; gap: 30px; }
  .availability-link { font-size: 12px; margin-top: 10px; }
  .hero-bottom { bottom: 17px; font-size: 12px; justify-content: space-between; }
  .section { padding-block: 72px; }
  .guide.section { padding-top: 72px; }
  .section h2 { font-size: 36px; letter-spacing: -.04em; }
  .section-heading, .reference-heading { display: block; margin-bottom: 36px; }
  .section-heading .eyebrow { margin-bottom: 16px; }
  .section-heading > p:last-child, .reference-heading > p { font-size: 15px; max-width: 480px; margin-top: 20px; }
  .eyebrow { font-size: 12px; letter-spacing: .7px; }
  .guide-layout { grid-template-columns: 1fr; gap: 36px; }
  .guide-demo { max-width: 440px; width: 100%; margin-inline: auto; padding: 10px; }
  .demo-top { font-size: 12px; top: 16px; left: 16px; right: 16px; }
  .demo-bottom { padding: 20px 10px 12px; gap: 16px; }
  .demo-bottom > span:first-child { font-size: 19px; }
  .demo-label { padding-inline: 10px; }
  .step { grid-template-columns: 24px 1fr 20px; gap: 12px; padding-block: 22px; }
  .step strong { font-size: 21px; }
  .step:before { left: -10px; }
  .step-copy { font-size: 15px; }
  .fine-print { font-size: 13px; }
  .references { padding-top: 4px; }
  .photo-strip { display: flex; gap: 16px; align-items: start; overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x mandatory; margin-inline: calc(-1 * var(--gutter)); padding: 0 var(--gutter) 10px; scrollbar-width: thin; scrollbar-color: #888 transparent; }
  .photo-strip figure { flex: 0 0 82%; min-width: 0; scroll-snap-align: center; }
  .photo-strip figure:nth-child(2), .photo-strip figure:last-child { padding-top: 0; }
  .photo-strip figure .photo, .photo-strip figure:first-child .photo { aspect-ratio: 2/3; }
  .photo img { object-position: 50% 20%; }
  figcaption { font-size: 14px; padding-block: 14px; }
  .gallery-help { display: block; font-size: 12px; margin-top: 14px; color: var(--muted); }
  .image-note { margin-top: 16px; }
  .privacy, .availability { grid-template-columns: 1fr; gap: 42px; }
  .privacy h2 { margin: 18px 0 24px; }
  .privacy-points > div { padding: 0 0 24px 32px; margin-bottom: 24px; }
  .privacy-points h3 { font-size: 21px; }
  .privacy-points p { font-size: 15px; }
  .launch > img { width: 64px; height: 64px; margin-bottom: 24px; }
  .launch > p:not(.eyebrow) { font-size: 15px; }
  .availability { gap: 52px; }
  .faq > h3 { font-size: 17px; }
  summary { font-size: 15px; padding-block: 22px; }
  .faq p { font-size: 15px; }
  footer { display: grid; grid-template-columns: 1fr; gap: 10px; padding-block: 28px; }
  footer > span { font-size: 12px; }
  footer nav { margin: 0; gap: 26px; font-size: 13px; }
}
@media (max-width: 360px), (max-height: 650px) and (max-width: 740px) {
  .hero { padding-block: 110px 70px; }
  .hero h1 { margin: 10px 0; }
  .hero-promise { font-size: 30px; }
  .hero-description { margin: 14px 0 18px; }
  .hero-bottom { bottom: 12px; }
}
@media (max-width: 360px) {
  .hero h1 { font-size: 50px; }
  .hero .eyebrow { font-size: 11px; }
  .section h2 { font-size: 32px; }
  .step strong { font-size: 19px; }
  .demo-bottom > span:first-child { font-size: 18px; }
  .demo-step { font-size: 11px; }
  .demo-bottom { gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *:before, *:after { animation: none !important; transition: none !important; }
  .motion-ready .reveal { opacity: 1; transform: none; }
}
@media (forced-colors: active) {
  .hero, .privacy, .guide-demo { background: Canvas; color: CanvasText; }
  .hero-content, .hero-bottom, .demo-top { background: Canvas; padding: 12px; }
  .button, .language { border: 1px solid ButtonText; }
  .signature img { forced-color-adjust: none; }
  .step.active:before { background: Highlight; }
  .demo-bottom { background: Canvas; color: CanvasText; }
}