:root { --paper: #fdfdfb; --white: #fff; --ink: #202a36; --muted: #637080; --line: #e2e6e9; --blue: #2867dc; --surface: #eef3fb; font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; color: var(--ink); background: var(--paper); font-synthesis: none; scroll-behavior: smooth; scroll-padding-top: 28px; }
* { box-sizing: border-box; }
body { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
button { color: inherit; cursor: pointer; border: 0; }
button, a, input, summary { -webkit-tap-highlight-color: transparent; }
img { max-width: 100%; display: block; height: auto; }
h1, h2, h3, p { margin: 0; }
[hidden] { display: none !important; }
button:focus-visible, a:focus-visible, summary:focus-visible, [tabindex]:focus-visible, input:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 5px;
}
::selection { background: #dce9fc; }
.skip-link { position: fixed; left: 20px; top: -100px; background: var(--ink); color: white; padding: 14px; z-index: 100; }
.skip-link:focus { top: 12px; }
.site-header { max-width: 1200px; height: 96px; margin: auto; padding: 0 40px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 8px; flex-shrink: 0; font-size: 24px; font-weight: 650; letter-spacing: .02em; }
.brand img { object-fit: contain; }
.site-header nav { display: flex; gap: 32px; font-size: 14px; color: #55616d; }
.site-header nav a:hover, .site-footer nav a:hover { color: var(--blue); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 28px; min-height: 52px; padding: 0 24px; border-radius: 10px; background: var(--ink); color: white; font-size: 15px; font-weight: 550; transition: background .15s, transform .15s; }
.button:hover { background: #344a5c; transform: translateY(-2px); }
.button[aria-disabled=true] { background: #6c7686; cursor: default; }
.button-small { font-size: 13px; min-height: 39px; padding: 0 18px; border-radius: 8px; }
.text-link { display: inline-flex; gap: 13px; align-items: center; font-size: 15px; font-weight: 500; background: transparent; padding: 10px 0; }
.text-link:hover { color: var(--blue); }
.text-link span { font-size: 19px; }
.hero { min-width: 0; }
.hero-eyebrow { font-size: 14px; color: var(--muted); margin-bottom: 24px; letter-spacing: .08em; }
.hero h1 { font-size: clamp(52px, 5.4vw, 70px); line-height: 1.17; font-weight: 650; letter-spacing: -.055em; }
.hero h1 span { color: var(--blue); }
.hero-copy { margin-top: 27px; }
.hero-description { font-size: 16px; line-height: 1.9; color: var(--muted); margin-bottom: 29px; }
.hero-actions { display: flex; align-items: center; gap: 25px; }
.system-note { display: flex; flex-wrap: wrap; gap: 5px; font-size: 12px; color: var(--muted); margin-top: 20px; line-height: 1.7; }
.section-wrap { max-width: 1120px; margin: 0 auto; }
.demo-section { min-width: 0; }
.experience { scroll-margin-top: 24px; display: flex; flex-direction: column; background: #edf2fb; border: 1px solid #e2e9f4; border-radius: 22px; overflow: hidden; }
.demo-tabs { order: 2; display: flex; gap: 0; padding: 6px 19px 12px; justify-content: center; }
.demo-tabs button { background: transparent; padding: 11px 16px; font-size: 14px; color: #596779; border-radius: 8px; transition: color .15s, background .15s; }
.demo-tabs button:hover { background: #ffffff80; color: var(--blue); }
.demo-tabs button[aria-selected=true] { background: white; box-shadow: 0 2px 6px #2537500b; color: var(--blue); font-weight: 600; }
.demo-surface { min-width: 0; }
#annotation-zoom { display: block; cursor: zoom-in; filter: drop-shadow(0 14px 16px #324d7420); }
.editor-image { width: 100%; aspect-ratio: 960 / 433; object-fit: contain; }
.demo-caption { display: flex; align-items: center; justify-content: space-between; gap: 15px; min-height: 52px; padding: 8px 25px; font-size: 13px; }
.demo-caption p { color: #5d6976; }
.demo-controls { display: flex; gap: 14px; flex-shrink: 0; }
.plain-button { background: transparent; padding: 8px 0; font-weight: 550; font-size: 13px; color: var(--blue); }
.plain-button:hover { text-decoration: underline; }
.small-note { font-size: 14px; color: var(--muted); }
.long-demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; height: 345px; padding: 26px; }
.long-demo-copy h2 { font-size: 27px; line-height: 1.35; margin: 12px 0; }
.long-demo-copy > p:not(.section-label) { font-size: 14px; line-height: 1.8; color: var(--muted); }
.long-demo-copy label { display: block; margin: 18px 0 8px; font-size: 13px; }
.long-demo-copy input { width: 100%; }
.long-demo-copy .small-note { font-size: 13px !important; margin-top: 12px; }
.long-scroll { height: 292px; overflow-y: auto; overscroll-behavior: contain; background: white; border-radius: 6px; box-shadow: 0 10px 28px #22222212; scrollbar-width: none; }
.long-scroll::-webkit-scrollbar { display: none; }
.long-scroll img { width: 100%; }
.ocr-demo-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 22px; padding: 28px; height: 345px; }
.demo-column-label { font-size: 15px; margin-bottom: 19px; color: var(--muted); }
.ocr-demo-grid img { box-shadow: 0 8px 25px #2222220d; border-radius: 7px; }
.copy-status:empty { display: none; }
.copy-status { padding: 10px 24px; background: white; color: var(--blue); font-size: 14px; }
.pin-stage { height: 345px; position: relative; overflow: hidden; }
.pin-background { padding: 28px; }
.pin-background h2 { font-size: 27px; line-height: 1.4; margin: 15px 0 12px; }
.pin-background p { font-size: 14px; line-height: 1.8; color: var(--muted); }
.pinned-image { position: absolute; left: 36%; top: 49%; width: 58%; background: white; padding: 0; box-shadow: 0 18px 50px #2223; cursor: grab; touch-action: none; user-select: none; border: 1px solid #ddd; transform: translate(var(--pin-x, 0px), var(--pin-y, 0px)); }
.pinned-image:active { cursor: grabbing; }
.pinned-image img { pointer-events: none; }
.opacity-control { display: flex; align-items: center; gap: 14px; font-size: 14px; }
.opacity-control input { max-width: 150px; }
input[type=range] { accent-color: var(--blue); min-height: 24px; }
.pin-hint { text-align: center; font-size: 13px; padding: 0 24px 12px; color: var(--muted); }
.noscript-note { padding: 20px; text-align: center; }
.section-label { font-size: 14px; font-weight: 500; color: var(--muted); letter-spacing: .03em; }
.feature-copy h2, .local-copy h2, .quiet-section h2 { font-size: 32px; margin-top: 0; }
.long-feature { display: flex; flex-direction: column; overflow: hidden; border-radius: 22px; background: #f3f1eb; }
.long-feature-art { height: 275px; overflow: hidden; position: relative; padding-top: 18px; }
.long-paper { width: 64%; margin: 0 auto; transform: rotate(-5deg); box-shadow: 0 12px 35px #514f4020; border-radius: 7px; overflow: hidden; }
.long-paper img { width: 100%; }
.feature-copy > p:not(.section-label), .local-copy > p:not(.section-label) { font-size: 15px; line-height: 1.9; color: var(--muted); margin: 17px 0 10px; }
.local-section { display: flex; flex-direction: column; overflow: hidden; border-radius: 22px; background: #edf3f7; }
.local-visual { height: 275px; padding: 16px 40px 0; overflow: hidden; position: relative; }
.local-visual img { border-radius: 9px; box-shadow: 0 12px 32px #25394f1a; width: 90%; margin: 0 auto; }
.local-visual p { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); white-space: nowrap; background: #fff; padding: 10px 14px; border-radius: 30px; font-size: 13px; color: #4b6b5b; display: flex; gap: 9px; align-items: center; box-shadow: 0 4px 18px #203c5610; }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: #5b886c; }
.quiet-section { padding: 0 0 85px; }
.quiet-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; }
.quiet-points h3 { font-size: 18px; font-weight: 550; margin-bottom: 12px; }
.quiet-points p { color: var(--muted); font-size: 15px; line-height: 1.9; }
kbd { font-family: inherit; display: inline-block; border: 1px solid #d8dfe4; border-radius: 5px; background: white; box-shadow: 0 2px 0 #e4e9ec; padding: 2px 6px; font-size: .9em; line-height: 1.35; color: #55616d; }
.faq-section { display: grid; grid-template-columns: .9fr 1.4fr; gap: 85px; padding: 62px 0 80px; border-top: 1px solid var(--line); }
.faq-section h2 { font-size: 32px; font-weight: 600; margin-top: 20px; letter-spacing: -.03em; }
.faq-list details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
.faq-list summary { padding: 23px 36px 23px 0; font-size: 16px; font-weight: 500; position: relative; line-height: 1.6; }
.faq-list summary::after { content: "+"; position: absolute; right: 3px; top: 23px; font-size: 21px; color: var(--muted); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details:first-child summary { padding-top: 0; }
.faq-list details:first-child summary::after { top: 0; }
.faq-list p { padding: 0 28px 23px 0; line-height: 1.9; color: var(--muted); font-size: 15px; }
.download-section { background: #eaf0fa; color: var(--ink); text-align: center; margin: 0 24px 24px; border-radius: 22px; padding: 55px 24px 42px; }
.download-inner { max-width: 720px; margin: auto; }
.download-icon { margin: 0 auto 23px; width: 65px; height: 65px; border-radius: 17px; }
.download-section h2 { font-size: 43px; font-weight: 630; letter-spacing: -.035em; }
.download-inner > p:first-of-type { font-size: 16px; color: var(--muted); margin: 16px 0 28px; }
.download-section .button { background: var(--blue); color: white; }
.download-section .button:hover { background: #2056bc; }
.site-footer { max-width: 1200px; margin: auto; padding: 38px 40px; display: flex; align-items: center; gap: 24px; }
.site-footer .brand { font-size: 20px; }
.site-footer nav { display: flex; gap: 25px; margin-left: auto; font-size: 13px; color: var(--muted); }
.document-page { max-width: 840px; margin: 65px auto 90px; padding: 0 28px; }
.document-page > h1 { font-size: 50px; font-weight: 650; letter-spacing: -.04em; margin: 20px 0; }
.document-lead { color: var(--muted); font-size: 18px; line-height: 1.8; margin-bottom: 55px; }
.release-entry { padding: 35px 0; border-top: 1px solid var(--line); }
.release-entry h2 { font-size: 27px; font-weight: 600; }
.release-entry time { display: block; color: var(--muted); font-size: 14px; margin: 12px 0 24px; }
.release-entry ul { padding-left: 22px; color: #566674; line-height: 2; font-size: 16px; }
.document-page section > p { font-size: 16px; line-height: 1.9; color: #566674; margin: 15px 0; }
.document-page section { margin: 35px 0; }
.back-link { margin-top: 35px; }

.hero-layout { max-width: 1200px; margin: auto; padding: 64px 40px 94px; display: grid; grid-template-columns: .8fr 1.45fr; gap: 50px; align-items: center; }

.hero-actions .button { background: var(--blue); box-shadow: 0 5px 14px #2867dc1c; padding: 0 21px; gap: 20px; }

.hero-actions .button:hover { background: #2056bc; }

.annotation-stage { min-height: 345px; display: flex; flex-direction: column; justify-content: center; padding: 36px 24px 18px; gap: 14px; }

.toolbar-image { width: 94%; max-width: 555px; margin: 0 auto; filter: drop-shadow(0 6px 8px #324d7414); }

.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding-bottom: 84px; }

.feature-copy { order: -1; padding: 39px 40px 18px; }

.local-copy { padding: 39px 40px 18px; }

.quiet-section > div:first-child { text-align: center; margin: 0 0 40px; }

.quiet-section .section-label { display: none; }

.quiet-points article { border-top: 1px solid var(--line); padding-top: 24px; }

.demo-panel { height: 447px; display: flex; flex-direction: column; }
.annotation-stage, .long-demo-grid, .ocr-demo-grid, .pin-stage { flex: 1; min-height: 0; }
.demo-caption { flex-shrink: 0; }
.local-visual img { transform: rotate(3deg); }
.local-visual p { bottom: 18px; }
@media (max-width: 1200px) {
  .section-wrap { margin-left: 40px; margin-right: 40px; }
  .hero-layout { gap: 34px; }
  .hero-actions { gap: 18px; }
  .hero-actions .button { padding: 0 18px; }
  .demo-tabs button { padding-left: 13px; padding-right: 13px; }
}
@media (max-width: 950px) {
  .demo-panel { height: 355px; }
  .site-header { height: 80px; padding: 0 30px; }
  .site-header nav { gap: 22px; }
  .site-header nav a:nth-child(2) { display: none; }
  .hero-layout { padding: 42px 30px 64px; grid-template-columns: .8fr 1.2fr; gap: 28px; }
  .hero h1 { font-size: 54px; }
  .hero-description { font-size: 14px; }
  .hero-actions { flex-wrap: wrap; gap: 12px; }
  .hero-actions .text-link { font-size: 14px; }
  .system-note { max-width: 245px; }
  .section-wrap { margin-left: 30px; margin-right: 30px; }
  .annotation-stage { min-height: 290px; padding: 30px 18px 18px; }
  .demo-tabs { padding: 5px 9px 12px; }
  .demo-tabs button { padding: 10px; font-size: 12px; }
  .demo-caption { padding: 8px 18px; font-size: 12px; gap: 10px; }
  .demo-caption p { line-height: 1.6; }
  .plain-button { font-size: 12px; }
  .demo-controls { gap: 10px; }
  .long-demo-grid { height: auto; min-height: 290px; padding: 20px; gap: 18px; }
  .long-demo-copy h2 { font-size: 23px; }
  .long-demo-copy > p:not(.section-label) { font-size: 12px; }
  .long-demo-copy .small-note { display: none; }
  .long-scroll { height: 250px; }
  .ocr-demo-grid { height: 290px; padding: 22px; gap: 16px; }
  .demo-column-label { font-size: 12px; }
  .pin-stage { height: 290px; }
  .pin-background { padding: 24px; }
  .pin-background h2 { font-size: 23px; }
  .pin-background p { font-size: 13px; }
  .pinned-image { top: 61%; left: 26%; width: 68%; }
  .opacity-control { font-size: 12px; gap: 8px; }
  .opacity-control input { max-width: 100px; }
  .feature-copy, .local-copy { padding: 30px 28px 16px; }
  .feature-copy h2, .local-copy h2 { font-size: 25px; }
  .feature-copy > p:not(.section-label), .local-copy > p:not(.section-label) { font-size: 14px; }
  .local-visual { padding: 16px 24px 0; }
  .long-feature-art, .local-visual { height: 240px; }
  .quiet-points { gap: 26px; }
  .faq-section { gap: 45px; }
}
@media (max-width: 700px) {
  .demo-panel { height: 330px; }
  .long-scroll { max-height: 235px; }
  .local-visual { height: 250px; }
  .site-header { height: 70px; padding: 0 23px; }
  .site-header nav { display: none; }
  .brand { font-size: 22px; gap: 5px; }
  .brand img { width: 39px; height: 39px; }
  .hero-layout { display: block; padding: 24px 24px 55px; }
  .hero { text-align: center; }
  .hero-eyebrow { font-size: 13px; margin-bottom: 16px; }
  .hero h1 { font-size: 52px; line-height: 1.16; }
  .hero h1 br { display: none; }
  .hero h1 span { display: block; }
  .hero-copy { margin-top: 20px; }
  .hero-description { font-size: 16px; margin-bottom: 23px; }
  .hero-actions { justify-content: center; gap: 26px; }
  .system-note { max-width: none; justify-content: center; margin-top: 17px; font-size: 12px; }
  .demo-section { margin: 28px -10px 0; }
  .experience { border-radius: 17px; }
  .annotation-stage { min-height: 0; padding: 32px 16px 14px; gap: 12px; }
  .demo-tabs { padding: 8px 9px 12px; }
  .demo-tabs button { font-size: 13px; padding: 10px 13px; }
  .demo-caption { padding: 8px 16px; font-size: 12px; min-height: 49px; }
  .demo-caption p { max-width: 56%; }
  .demo-controls { gap: 9px; }
  .plain-button { font-size: 12px; }
  .toolbar-image { width: 98%; }
  .long-demo-grid { height: auto; min-height: 0; padding: 25px 20px; gap: 17px; }
  .long-demo-copy h2 { font-size: 24px; }
  .long-demo-copy label { font-size: 12px; }
  .section-label { font-size: 13px; }
  .long-scroll { height: 285px; }
  .demo-caption > .small-note { display: none; }
  .ocr-demo-grid { height: auto; min-height: 0; grid-template-columns: 1fr; padding: 16px 25px; gap: 0; }
  .ocr-demo-grid > div:first-child { display: none; }
  .ocr-demo-grid img { max-height: 190px; width: auto; margin: auto; }
  .ocr-demo-grid .demo-column-label { margin-bottom: 9px; }
  .pin-stage { height: 325px; }
  .pin-background { padding: 26px; }
  .pin-background h2 { font-size: 26px; }
  .pinned-image { left: 18%; top: 61%; width: 75%; }
  .pin-hint { font-size: 12px; }
  .section-wrap { margin-left: 24px; margin-right: 24px; }
  .feature-grid { grid-template-columns: 1fr; gap: 20px; padding-bottom: 53px; }
  .feature-copy, .local-copy { padding: 30px 28px 16px; }
  .feature-copy h2, .local-copy h2 { font-size: 27px; }
  .feature-copy > p:not(.section-label), .local-copy > p:not(.section-label) { font-size: 15px; }
  .long-feature-art, .local-visual { height: 245px; }
  .long-paper { width: 66%; }
  .local-visual { padding: 16px 23px 0; }
  .quiet-section { padding: 0 0 51px; }
  .quiet-section > div:first-child { text-align: left; margin-bottom: 29px; }
  .quiet-section h2 { font-size: 29px; max-width: 270px; line-height: 1.5; }
  .quiet-points { grid-template-columns: 1fr; gap: 24px; }
  .quiet-points article { padding-top: 22px; }
  .quiet-points h3 { font-size: 19px; }
  .faq-section { display: block; padding: 45px 0 53px; }
  .faq-section h2 { font-size: 29px; margin-top: 12px; }
  .faq-list { margin-top: 30px; }
  .faq-list summary { font-size: 15px; }
  .faq-list p { font-size: 14px; }
  .download-section { margin: 0 14px 14px; padding: 38px 20px; border-radius: 17px; }
  .download-icon { width: 56px; height: 56px; margin-bottom: 18px; }
  .download-section h2 { font-size: 34px; }
  .site-footer { padding: 27px 24px; flex-wrap: wrap; }
  .site-footer nav { width: 100%; gap: 14px; justify-content: space-between; margin: 0; font-size: 12px; }
  .document-page { margin: 35px auto 60px; padding: 0 25px; }
  .document-page > h1 { font-size: 40px; }
  .document-lead { font-size: 16px; margin-bottom: 35px; }
  .release-entry h2 { font-size: 24px; }
  .release-entry ul, .document-page section > p { font-size: 15px; }
}
@media (max-width: 360px) {
  #panel-long { height: 570px; }
  .hero h1 { font-size: 52px; }
  .hero-description { font-size: 14px; }
  .hero-actions { gap: 18px; }
  .hero-actions .button { padding: 0 16px; }
  .system-note { font-size: 11px; }
  .demo-tabs button { padding-left: 10px; padding-right: 10px; font-size: 12px; }
  .demo-caption { padding-left: 12px; padding-right: 12px; }
  .demo-controls { gap: 6px; }
  .long-demo-grid { grid-template-columns: 1fr; }
  .long-scroll { height: 260px; }
  .feature-copy, .local-copy { padding-left: 24px; padding-right: 24px; }
  .feature-copy h2, .local-copy h2 { font-size: 24px; }
}
@media (prefers-reduced-motion: reduce) {
  :root { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .button:hover { transform: none; }
}

#download-status { margin-top: 18px; font-size: 14px; line-height: 1.7; color: var(--muted); }