/* Readling companion pages — a quiet, spacious frame for the real software. */
:root {
  color-scheme: light;
  --background: #fafafa;
  --surface: #fff;
  --ink: #101010;
  --muted: #777;
  --line: #ececec;
  --body: var(--font-sans, "Inter", "Alibaba PuHuiTi", sans-serif);
  --mono: Consolas, "Liberation Mono", monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 116px; }
body { margin: 0; background: var(--background); color: var(--ink); font: 15px/1.8 var(--body); -webkit-font-smoothing: antialiased; }
h1,h2,h3,p,figure,ul { margin: 0; }
h1,h2,h3 { text-wrap: balance; }
a { color: inherit; text-underline-offset: 4px; }
button { color: inherit; font: inherit; cursor: pointer; }
a,button { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; height: auto; }
svg { display: block; flex-shrink: 0; }
[hidden] { display: none !important; }
::selection { background: #dedede; color: var(--ink); }
:focus-visible { outline: 2px solid #555; outline-offset: 4px; }
.container,.policy-shell { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.icon { width: 24px; height: 24px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.sr-only { position: absolute; width: 1px; height: 1px; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip-link { position: fixed; z-index: 100; left: 20px; top: 12px; padding: 12px 20px; border-radius: 10px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 5px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); font-size: 10px; line-height: 1.8; letter-spacing: .09em; color: var(--muted); }
.status-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--ink); }

/* An independent navigation capsule leaves the logo and actions room to breathe. */
.site-header { position: fixed; inset: 0 0 auto; z-index: 40; padding-block: 20px; background: rgb(250 250 250 / 94%); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.header-inner { position: relative; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; min-height: 46px; }
.brand { display: inline-flex; align-items: center; gap: 9px; justify-self: start; color: var(--ink); font-size: 23px; font-weight: 600; line-height: 1.2; letter-spacing: -.9px; text-decoration: none; white-space: nowrap; }
.brand-emblem { display: grid; place-items: center; width: 28px; height: 28px; }
.brand-emblem img { display: block; width: 100%; height: 100%; max-width: none; }
.brand-emblem .icon { width: 27px; height: 29px; stroke-width: 1.7; }
.site-nav { display: flex; align-items: center; gap: 3px; padding: 5px; border-radius: 999px; background: #efefef; }
.site-nav a { display: inline-flex; align-items: center; justify-content: center; min-height: 36px; padding: 5px 17px; border-radius: 999px; font-size: 12px; font-weight: 500; color: #696969; text-decoration: none; white-space: nowrap; transition: color .2s,background .2s,box-shadow .2s; }
.site-nav a:hover { color: var(--ink); }
.site-nav a[aria-current="page"] { background: var(--surface); color: var(--ink); box-shadow: 0 2px 5px rgb(0 0 0 / 7%); }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 12px; }
.language-toggle { display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; min-width: 44px; min-height: 44px; padding: 0 9px; border: 0; border-radius: 10px; background: transparent; font-size: 11px; font-weight: 500; transition: background .2s; }
.language-toggle:hover { background: #ededed; }
.header-contact { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 42px; padding: 0 18px; border: 1px solid var(--ink); border-radius: 10px; background: var(--ink); color: white; font-size: 12px; font-weight: 500; text-decoration: none; white-space: nowrap; transition: background .2s,transform .2s; }
.header-contact:hover { background: #333; transform: translateY(-1px); }
.nav-toggle { display: none; width: 44px; height: 44px; padding: 11px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.nav-toggle span { display: block; width: 20px; height: 1.5px; margin: 5px 0; background: currentColor; transition: transform .2s; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.25px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.25px) rotate(-45deg); }

.secondary-page { padding-top: 154px; }
.page-heading { display: flex; flex-direction: column; align-items: center; gap: 0; margin-bottom: 42px; text-align: center; }
.page-heading h1 { margin-top: 20px; max-width: 840px; font-size: clamp(42px,5vw,60px); font-weight: 500; line-height: 1.16; letter-spacing: -.055em; }
.page-heading > p:not(.eyebrow) { max-width: 520px; margin-top: 19px; color: var(--muted); font-size: 14px; line-height: 1.9; }

/* Original captures stay complete and unfiltered inside a soft white card. */
.screenshot-browser { position: relative; padding: 16px; border: 1px solid var(--line); border-radius: 24px; background: var(--surface); box-shadow: 0 10px 35px rgb(0 0 0 / 3%); }
.gallery-stage { position: relative; }
.gallery-viewport { position: relative; display: grid; gap: 32px; }
.gallery-ready .gallery-viewport { display: block; overflow: hidden; border-radius: 13px; }
.screenshot-card { min-width: 0; overflow: hidden; border: 0; border-radius: 13px; background: var(--surface); }
.screenshot-image { overflow: hidden; aspect-ratio: 1920 / 1150; border-radius: 12px; background: var(--surface); }
.screenshot-image img { width: 100%; height: 100%; object-fit: contain; }
.gallery-ready .screenshot-image { touch-action: pan-y pinch-zoom; user-select: none; }
.screenshot-card figcaption { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 16px 24px 58px; border-bottom: 1px solid var(--line); }
.screenshot-card figcaption::before { content: attr(data-shot); position: absolute; left: 16px; top: 30px; color: #999; font-size: 11px; line-height: 1.8; }
.screenshot-card figcaption > div { max-width: 740px; }
.screenshot-card figcaption h3 { font-size: clamp(18px,1.9vw,22px); font-weight: 500; line-height: 1.5; letter-spacing: -.03em; }
.screenshot-card figcaption p { max-width: 660px; margin-top: 8px; font-size: 11px; line-height: 1.85; color: var(--muted); }
.screenshot-card .image-link { display: inline-flex; align-items: center; min-height: 44px; flex-shrink: 0; color: var(--ink); font-size: 11px; text-decoration: none; }
.screenshot-card .image-link:hover { text-decoration: underline; }
.gallery-ready .screenshot-card.is-leaving { position: absolute; inset: 0 0 auto; pointer-events: none; }
.gallery-side-controls { position: absolute; right: 0; bottom: -67px; width: 100px; height: 44px; pointer-events: none; }
.gallery-arrow { display: grid; place-items: center; position: absolute; top: 0; width: 44px; height: 44px; border: 1px solid #e6e6e6; border-radius: 50%; background: var(--surface); color: var(--ink); padding: 0; pointer-events: auto; transition: background .2s,border-color .2s,color .2s,transform .2s; }
.gallery-arrow-prev { left: 0; }
.gallery-arrow-next { right: 0; }
.gallery-arrow:hover { background: var(--ink); border-color: var(--ink); color: white; transform: translateY(-2px); }
.gallery-arrow:active { transform: none; }
.gallery-arrow svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.7; }
.gallery-meta { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 44px; margin-top: 23px; padding-right: 130px; font-size: 10px; color: var(--muted); }
.gallery-counter { color: var(--ink); font-weight: 500; white-space: nowrap; }
.gallery-thumbnails { display: grid; grid-template-columns: repeat(9,minmax(96px,1fr)); gap: 8px; overflow-x: auto; overscroll-behavior-x: contain; counter-reset: screenshot; margin-top: 23px; padding: 3px 3px 8px; scrollbar-width: thin; scrollbar-color: #ccc transparent; }
.gallery-thumbnails button { position: relative; display: flex; flex-direction: column; gap: 7px; counter-increment: screenshot; min-width: 0; padding: 8px; border: 1px solid transparent; border-radius: 10px; background: #f7f7f7; text-align: left; color: var(--muted); transition: border-color .2s,background .2s,color .2s; }
.gallery-thumbnails button::before { content: counter(screenshot,decimal-leading-zero); display: block; color: #888; font-size: 10px; line-height: 1.5; }
.gallery-thumbnails button:hover { color: var(--ink); background: #f1f1f1; }
.gallery-thumbnails button[aria-pressed="true"] { border-color: #d5d5d5; background: var(--surface); color: var(--ink); box-shadow: 0 2px 5px rgb(0 0 0 / 4%); }
.gallery-thumbnails button[aria-pressed="true"]::before { color: var(--ink); }
.gallery-thumbnails img { display: block; width: 100%; aspect-ratio: 1920/1150; object-fit: contain; border: 1px solid var(--line); border-radius: 5px; }
.gallery-thumbnails span { display: block; font-size: 10px; line-height: 1.6; }
.noscript-note { font-size: 13px; margin-bottom: 20px; }
.capture-note { max-width: 880px; margin: 25px auto 0; color: var(--muted); font-size: 11px; line-height: 1.95; text-align: center; }
.capture-note a { color: var(--ink); white-space: nowrap; }

/* A readable document, with a quiet index beside the white content card. */
.policy-heading { display: flex; flex-direction: column; align-items: center; text-align: center; }
.policy-heading h1 { margin-top: 20px; max-width: 920px; font-size: clamp(36px,4.7vw,54px); font-weight: 500; line-height: 1.2; letter-spacing: -.05em; }
.policy-dates { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px 24px; margin-top: 22px; color: var(--muted); font-size: 11px; }
.policy-layout { display: grid; grid-template-columns: 220px minmax(0,1fr); gap: 42px; margin-top: 48px; align-items: start; }
.policy-toc { position: sticky; top: 110px; padding: 21px 22px; border: 1px solid var(--line); border-radius: 15px; background: var(--surface); }
.policy-toc h2 { font-size: 12px; font-weight: 600; line-height: 1.8; }
.policy-toc ul { list-style: none; padding: 14px 0 0; }
.policy-toc a { position: relative; display: flex; align-items: center; min-height: 40px; padding-block: 8px; color: var(--muted); font-size: 11px; line-height: 1.65; text-decoration: none; transition: color .2s; }
.policy-toc a:hover,.policy-toc a[aria-current] { color: var(--ink); }
.policy-toc a[aria-current]::after { content: ""; position: absolute; top: 17px; right: -10px; width: 4px; height: 4px; border-radius: 50%; background: var(--ink); }
.policy-content { min-width: 0; padding: 32px 36px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); color: #646464; font-size: 14px; line-height: 1.95; overflow-wrap: anywhere; }
.policy-content > p { margin-top: 0; color: var(--ink); font-size: 18px; line-height: 1.85; letter-spacing: -.015em; }
.policy-content section { position: relative; margin-top: 34px; padding-top: 27px; border-top: 1px solid var(--line); }
.policy-content h2 { color: var(--ink); font-size: 21px; font-weight: 500; line-height: 1.5; letter-spacing: -.025em; }
.policy-content p { margin-top: 17px; }
.policy-content code { padding: 2px 5px; border: 1px solid var(--line); border-radius: 4px; background: #f6f6f6; font: .88em var(--mono); color: var(--ink); }
.policy-content a { color: var(--ink); }
.policy-content strong { color: var(--ink); font-weight: 500; }
.site-footer { margin-top: 88px; padding-block: 28px; border-top: 1px solid var(--line); }
.footer-bottom { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 12px 24px; font-size: 11px; color: var(--muted); }
.footer-bottom .brand { font-size: 22px; }
.footer-bottom > a:not(.brand) { display: inline-flex; align-items: center; min-height: 40px; text-decoration: none; }
.footer-bottom > a:hover { color: var(--ink); }

@media (max-width: 1100px) {
  .container,.policy-shell { width: calc(100% - 64px); }
  .header-inner { gap: 16px; }
  .site-nav a { padding-inline: 13px; }
  .header-actions { gap: 6px; }
  .policy-layout { grid-template-columns: 200px minmax(0,1fr); gap: 28px; }
  .policy-content { padding: 28px; }
}
@media (max-width: 880px) {
  .site-header { padding-block: 16px; }
  .header-inner { display: flex; flex-wrap: wrap; gap: 10px 18px; }
  .header-actions { margin-left: auto; }
  .site-nav { order: 3; width: 100%; justify-content: center; flex-wrap: wrap; }
  .site-nav a { min-height: 40px; padding-inline: 20px; }
  .menu-ready .site-nav { position: absolute; left: 0; right: 0; top: calc(100% + 12px); display: none; padding: 10px; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); box-shadow: 0 12px 30px rgb(0 0 0 / 6%); }
  .menu-ready .site-nav.is-open { display: flex; }
  .menu-ready .site-nav a[aria-current="page"] { background: #f2f2f2; box-shadow: none; }
  .menu-ready .nav-toggle { display: block; }
  .secondary-page { padding-top: 174px; }
  body:has(.menu-ready) { padding-top: 134px; }
  .page-heading { margin-bottom: 34px; }
  .page-heading h1 { font-size: 48px; }
  .screenshot-browser { padding: 12px; border-radius: 20px; }
  .screenshot-card figcaption { align-items: flex-start; flex-direction: column; gap: 8px; padding: 22px 16px 18px 52px; }
  .screenshot-card figcaption::before { top: 25px; }
  .gallery-meta { gap: 16px; }
  .gallery-thumbnails { grid-template-columns: repeat(9,112px); }
  .policy-layout { grid-template-columns: 1fr; gap: 24px; margin-top: 36px; }
  .policy-toc { position: static; padding: 20px 24px; }
  .policy-toc ul { display: grid; grid-template-columns: 1fr 1fr; gap: 3px 24px; }
  .policy-toc a[aria-current]::after { display: none; }
  .footer-bottom { justify-content: flex-start; gap: 8px 22px; }
  .footer-bottom .brand { width: 100%; margin-bottom: 6px; }
  .footer-bottom > a:last-child { margin-left: auto; }
}
@media (max-width: 540px) {
  html { scroll-padding-top: 100px; }
  .secondary-page { padding-top: 204px; }
  .container,.policy-shell { width: calc(100% - 36px); }
  .site-header { padding-block: 12px; }
  .brand { font-size: 21px; gap: 7px; }
  .brand-emblem { width: 26px; height: 26px; }
  .header-actions { gap: 2px; }
  .header-contact { display: none; }
  .menu-ready .site-nav { flex-direction: column; align-items: stretch; gap: 4px; }
  .menu-ready .site-nav a { min-height: 44px; border-radius: 9px; }
  .site-nav a { padding-inline: 12px; font-size: 11px; }
  body:has(.menu-ready) { padding-top: 114px; }
  .eyebrow { font-size: 9px; letter-spacing: .07em; }
  .page-heading h1 { font-size: 40px; margin-top: 17px; }
  html[lang="en"] .page-heading h1 { font-size: clamp(34px,9vw,42px); }
  .page-heading > p:not(.eyebrow) { font-size: 13px; margin-top: 15px; }
  .screenshot-browser { padding: 7px; border-radius: 16px; }
  .screenshot-card,.screenshot-image,.gallery-ready .gallery-viewport { border-radius: 10px; }
  .screenshot-card figcaption { padding: 18px 12px 12px; }
  .screenshot-card figcaption::before { position: static; margin-bottom: 0; font-size: 10px; }
  .screenshot-card figcaption h3 { font-size: 18px; }
  .screenshot-card figcaption p { font-size: 11px; }
  .screenshot-card .image-link { font-size: 10px; }
  .gallery-side-controls { right: 4px; bottom: -65px; }
  .gallery-meta { display: block; padding-top: 9px; padding-right: 112px; padding-left: 5px; font-size: 10px; }
  #galleryHelp { margin-top: 17px; width: calc(100% + 108px); font-size: 9px; }
  .gallery-thumbnails { margin-top: 20px; padding-inline: 3px; grid-template-columns: repeat(9,108px); }
  .capture-note { margin-top: 22px; font-size: 10px; text-align: left; }
  .policy-heading h1 { font-size: 35px; }
  html[lang="en"] .policy-heading h1 { font-size: clamp(31px,8.2vw,39px); }
  .policy-dates { font-size: 10px; gap: 4px 16px; margin-top: 18px; }
  .policy-layout { margin-top: 28px; gap: 20px; }
  .policy-toc { padding: 18px 20px; }
  .policy-toc ul { grid-template-columns: 1fr; gap: 0; }
  .policy-content { padding: 23px 20px; font-size: 13px; border-radius: 15px; }
  .policy-content > p { font-size: 17px; }
  .policy-content h2 { font-size: 20px; }
  .site-footer { margin-top: 60px; padding-block: 22px; }
  .footer-bottom { font-size: 10px; gap: 6px 18px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *,*::before,*::after { transition-duration: .01ms !important; }
}
@media print {
  :root { --ink: #222; --muted: #555; --surface: #fff; --line: #ccc; }
  body,body:has(.menu-ready) { background: #fff; color: #222; padding-top: 0 !important; }
  .site-header,.site-footer,.policy-toc,.gallery-side-controls,.gallery-meta,.gallery-thumbnails,.skip-link { display: none !important; }
  .container,.policy-shell { width: 100%; }
  .page-heading,.policy-heading { padding: 0 0 24px; background: white; color: #222; }
  .eyebrow { padding: 0; border: 0; }
  .policy-layout { display: block; }
  .policy-content { padding: 0; border: 0; border-radius: 0; }
  .policy-content,.screenshot-card figcaption p { color: #333; }
  .policy-content section { break-inside: avoid-page; }
  .screenshot-browser { padding: 0; border: 0; background: white; box-shadow: none; }
  .gallery-ready .gallery-viewport { display: grid; overflow: visible; }
  #galleryViewport [data-gallery-slide] { display: block !important; position: static !important; transform: none !important; break-inside: avoid; }
  .capture-note { margin-inline: 0; }
}