/* Copyright (c) 2026 Tz1.cn. All Rights Reserved. */

/**
 * @file styles.css
 * @brief 为个人作品、静态截图浏览器与网站说明提供深底淡绿的响应式样式。
 */
:root {
  color-scheme: dark;
  --bg: #101112;
  --surface: #191b1c;
  --surface-soft: #151718;
  --border: #303334;
  --text: #f2f0e9;
  --muted: #b0b2ad;
  --subtle: #959992;
  --accent: #d4e59b;
  --ink: #202719;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", Consolas, monospace;
  --radius: 18px;
  --header-height: 76px;
}
* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--header-height) + 24px); }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.75 var(--font); -webkit-font-smoothing: antialiased; }
h1, h2, h3, p, figure, ol, ul, dl, dd { margin: 0; }
h1, h2, h3 { text-wrap: balance; }
a { color: inherit; text-underline-offset: 5px; }
button { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
button, summary { cursor: pointer; }
button:disabled { cursor: default; }
button, input { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
svg { display: block; flex-shrink: 0; }
::selection { color: var(--ink); background: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; border-radius: 3px; }
[hidden] { display: none !important; }
.container { width: min(1200px, calc(100% - 96px)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 200; top: 12px; left: 20px; transform: translateY(-180%); padding: 10px 18px; background: var(--accent); color: var(--ink); border-radius: 8px; }
.skip-link:focus { transform: none; }
.site-header { position: sticky; top: 0; z-index: 50; border-bottom: 1px solid var(--border); background: rgba(16, 17, 18, .94); backdrop-filter: blur(18px); }
.header-inner { min-height: var(--header-height); display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 22px; font-weight: 650; letter-spacing: -.7px; text-decoration: none; white-space: nowrap; }
.brand img { flex-shrink: 0; }
.brand-dot { color: var(--accent); }
.site-nav { display: flex; align-items: center; gap: 28px; }
.site-nav a { color: var(--muted); font-size: 14px; text-decoration: none; padding: 12px 0; transition: color .18s; }
.site-nav a:hover { color: var(--accent); }
.header-actions { display: flex; gap: 16px; align-items: center; }
.platform-label { display: inline-flex; align-items: center; gap: 8px; color: var(--subtle); font-size: 12px; white-space: nowrap; }
.platform-label svg { width: 15px; height: 15px; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--border); border-radius: 10px; padding: 12px; background: var(--surface); }
.nav-toggle span { display: block; height: 1px; width: 18px; background: var(--text); margin: 5px 0; transition: transform .18s; }
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3px) rotate(-45deg); }
.eyebrow { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 13px; letter-spacing: .05em; }
.status-dot { display: inline-block; width: 6px; height: 6px; flex-shrink: 0; border-radius: 50%; background: var(--accent); }
.section-number { color: var(--accent); font: 12px var(--mono); letter-spacing: .04em; }
.hero { padding-top: 64px; background: radial-gradient(ellipse at 80% 8%, rgba(168, 186, 109, .045), transparent 50%); }
.hero-intro { display: grid; grid-template-columns: 1.22fr 1fr; gap: 48px; align-items: end; margin-top: 28px; }
h1 { font-size: clamp(36px, 4.2vw, 60px); font-weight: 580; letter-spacing: -.045em; line-height: 1.35; }
.highlight-word { position: relative; color: var(--accent); }
.highlight-word::after { content: ""; position: absolute; left: 0; right: 0; bottom: -3px; height: 3px; background: var(--accent); transform: rotate(-2deg); opacity: .6; }
.hero-copy > p:first-child { color: var(--muted); font-size: 16px; line-height: 1.85; }
.button-row { display: flex; flex-wrap: wrap; align-items: center; gap: 24px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; justify-content: space-between; gap: 28px; min-height: 48px; padding: 11px 20px; border: 1px solid transparent; border-radius: 8px; text-decoration: none; font-size: 14px; font-weight: 600; transition: background .2s, transform .2s; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--accent); color: var(--ink); }
.button-primary:hover { background: #e1efb1; }
.text-link { display: inline-flex; align-items: center; gap: 14px; color: var(--text); font-size: 14px; text-decoration: none; padding-block: 8px; }
.text-link:hover { color: var(--accent); }
.hero-note { margin-top: 18px; color: var(--subtle); font-size: 12px; }
.product-preview { margin-top: 48px; border: 1px solid #414640; border-radius: 14px; overflow: hidden; background: var(--surface); box-shadow: 0 20px 65px #0003; }
.preview-toolbar { min-height: 57px; display: flex; align-items: center; justify-content: space-between; padding: 8px 20px; gap: 16px; }
.preview-brand { display: flex; align-items: center; gap: 9px; font-size: 12px; color: var(--muted); }
.preview-type { color: var(--subtle); font: 11px var(--mono); }
.preview-tabs { display: flex; gap: 4px; padding: 3px; border-radius: 7px; background: #0e1010; }
.preview-tab { padding: 7px 14px; min-height: 34px; border: 0; border-radius: 5px; background: transparent; color: var(--muted); font-size: 12px; transition: background .2s, color .2s; }
.preview-tab[aria-pressed="true"] { background: #33392c; color: #e0ecb8; }
.preview-tab:hover { color: var(--text); }
.preview-panel { background: #f8f8f8; aspect-ratio: 3285 / 1717; }
.preview-panel img { width: 100%; height: 100%; object-fit: contain; }
.product-preview figcaption, .ai-figure figcaption { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 20px; font-size: 12px; color: var(--muted); }
.image-link { flex-shrink: 0; color: var(--accent); text-decoration: none; padding: 4px 0; }
.image-link:hover { text-decoration: underline; }
.noscript-note { margin-block: 18px; font-size: 14px; color: var(--muted); }
.capability-strip { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); padding-block: 27px; border-bottom: 1px solid var(--border); }
.capability-strip > div { display: flex; align-items: center; justify-content: center; gap: 18px; font-size: 13px; border-right: 1px solid var(--border); }
.capability-strip > div:first-child { justify-content: flex-start; }
.capability-strip > div:last-child { justify-content: flex-end; border-right: 0; }
.mono { font: 11px var(--mono); color: var(--subtle); }
.section { padding-top: 116px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 64px; margin-bottom: 38px; }
h2 { margin-top: 18px; font-size: clamp(28px, 3vw, 40px); font-weight: 550; line-height: 1.45; letter-spacing: -.035em; }
.section-description { color: var(--muted); font-size: 15px; line-height: 1.95; }
.section-heading > .section-description { max-width: 370px; flex: 0 1 370px; padding-bottom: 4px; }
.translation-grid { display: grid; grid-template-columns: 1.35fr 1fr; gap: 22px; }
.translation-main { min-width: 0; padding: 26px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.card-topline { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 24px; font-size: 14px; }
.small-label { color: var(--accent); font-size: 11px; padding: 3px 8px; border: 1px solid #424b34; border-radius: 4px; }
.reading-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.reading-sheet { min-width: 0; padding: 24px 21px; background: #efeee8; color: #34362e; border-radius: 5px; box-shadow: 0 8px 16px #0002; }
.sheet-label { display: block; font: 10px var(--mono); letter-spacing: .03em; color: #626759; }
.reading-sheet h3 { margin-top: 24px; font-size: 16px; font-weight: 600; white-space: nowrap; }
.document-lines { display: grid; gap: 12px; margin: 22px 0 32px; }
.document-lines i { display: block; height: 4px; background: #c9ccc1; border-radius: 1px; }
.document-lines i:nth-child(2) { width: 91%; }
.document-lines i:nth-child(3) { width: 95%; }
.document-lines i:last-child { width: 65%; }
.translated { background: #e2e9d2; }
.translated .document-lines i { background: #b9c4a6; }
.sheet-foot { display: block; font-size: 11px; color: #5c6251; border-top: 1px solid #bfc5b6; padding-top: 12px; }
.diagram-caption { font-size: 11px; color: var(--subtle); margin-top: 14px; }
.language-row { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--border); color: var(--muted); font-size: 11px; }
.translation-notes { display: grid; gap: 12px; }
.note-card { display: flex; gap: 18px; padding: 22px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface-soft); }
.note-index { font: 12px var(--mono); color: var(--accent); padding-top: 4px; }
h3 { font-size: 17px; line-height: 1.6; font-weight: 600; letter-spacing: -.01em; }
.note-card p { margin-top: 7px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.section-footnote { margin-top: 20px; color: var(--subtle); font-size: 12px; max-width: 1000px; }
.ai-layout { display: grid; grid-template-columns: .9fr 1.25fr; gap: 72px; align-items: center; }
.ai-copy > .section-description { margin-top: 22px; }
.action-pills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
.action-pills span { font-size: 12px; color: var(--accent); padding: 5px 14px; border: 1px solid #39422e; border-radius: 6px; background: #20251b; }
.steps { padding: 0; margin-top: 28px; list-style: none; display: grid; gap: 20px; }
.steps li { display: flex; gap: 16px; }
.steps li > span { display: grid; place-items: center; width: 25px; height: 25px; flex-shrink: 0; border: 1px solid var(--border); border-radius: 50%; font: 11px var(--mono); color: var(--subtle); margin-top: 2px; }
.steps strong { display: block; font-size: 14px; font-weight: 550; }
.steps p { color: var(--subtle); font-size: 12px; margin-top: 3px; }
.ai-figure { min-width: 0; padding: 18px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.ai-image { background: #f9f9f9; border-radius: 8px; overflow: hidden; }
.ai-image img { width: 100%; }
.ai-figure figcaption { padding-inline: 0; }
.context-note { display: flex; align-items: baseline; gap: 12px; padding: 18px 0 2px; border-top: 1px solid var(--border); }
.context-note p { font-size: 12px; line-height: 1.85; color: var(--subtle); }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--surface-soft); }
.feature-card { min-width: 0; padding: 30px; border-right: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.feature-card:nth-child(3n) { border-right: 0; }
.feature-card:nth-last-child(-n+3) { border-bottom: 0; }
.feature-icon { display: grid; place-items: center; width: 36px; height: 36px; margin-bottom: 23px; border: 1px solid #39402e; border-radius: 9px; background: #22271c; color: var(--accent); }
.feature-icon svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }
.feature-card p { margin-top: 12px; color: var(--muted); font-size: 13px; line-height: 1.9; }
.card-label { display: block; margin-top: 24px; color: var(--subtle); font: 11px/1.8 var(--mono); }
.swatches { display: flex; gap: 7px; margin-top: 24px; }
.swatches i { width: 17px; height: 8px; border-radius: 2px; background: #e2d065; }
.swatches i:nth-child(2) { background: #9cb780; }
.swatches i:nth-child(3) { background: #dcaaa5; }
.swatches i:nth-child(4) { background: #92b1c4; }
.swatches i:nth-child(5) { background: #b5a1c8; }
.model-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; padding-block: 48px; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.model-panel h2 { font-size: 32px; }
.model-panel .section-description { margin-top: 20px; }
.model-panel .text-link { margin-top: 20px; }
.connection-card { min-width: 0; padding: 26px; border: 1px solid var(--border); border-radius: 12px; background: var(--surface); }
.connection-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; font-size: 13px; padding-bottom: 22px; color: var(--accent); }
.connection-head > span:nth-child(2) { color: var(--subtle); }
.connection-card dl { display: grid; gap: 16px; padding-block: 22px; border-block: 1px solid var(--border); }
.connection-card dl > div { display: grid; grid-template-columns: 76px 1fr; gap: 16px; font-size: 12px; }
.connection-card dt { color: var(--subtle); }
.connection-card dd { min-width: 0; color: var(--text); }
.connection-card > p { margin-top: 18px; color: var(--subtle); font-size: 12px; }
.privacy-panel { border-radius: var(--radius); padding: 48px; background: #d9e3c1; color: #29321f; }
.privacy-heading { display: flex; align-items: center; justify-content: space-between; gap: 32px; }
.privacy-heading .eyebrow { color: #546148; }
.privacy-heading h2 { margin-top: 14px; }
.button-ink { background: #29321f; color: #edf1e5; flex-shrink: 0; }
.button-ink:hover { background: #39482d; }
.privacy-panel :focus-visible { outline-color: #29321f; }
.privacy-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-top: 44px; padding-top: 32px; border-top: 1px solid #b5c19f; }
.privacy-index { display: block; font: 11px var(--mono); color: #546148; margin-bottom: 15px; }
.privacy-grid h3 { font-size: 16px; }
.privacy-grid p { margin-top: 12px; color: #4c5840; font-size: 13px; line-height: 1.95; }
.privacy-footnote { margin-top: 30px; font-size: 11px; color: #546148; }
.faq-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 80px; }
.faq-intro h2 { font-size: 32px; }
.faq-intro > p:not(.eyebrow) { font-size: 14px; color: var(--muted); margin-top: 20px; }
.faq-intro .text-link { margin-top: 20px; }
.faq-list { border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 22px 0; list-style: none; font-size: 15px; font-weight: 500; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary > span { color: var(--subtle); font-size: 22px; font-weight: 300; line-height: 1; transition: transform .2s; }
.faq-item[open] summary > span { transform: rotate(45deg); color: var(--accent); }
.faq-item[open] summary { color: var(--accent); }
.faq-body { padding: 0 28px 24px 0; }
.faq-body p { color: var(--muted); font-size: 13px; line-height: 1.95; }
.faq-body a { color: var(--accent); }
.site-footer { border-top: 1px solid var(--border); margin-top: 116px; padding-block: 52px 24px; }
.footer-main { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 52px; }
.footer-brand p { margin-top: 16px; color: var(--muted); font-size: 14px; }
.footer-platform { display: block; margin-top: 8px; color: var(--subtle); font-size: 12px; }
.footer-links { display: flex; flex-direction: column; align-items: flex-start; gap: 12px; }
.footer-links h2 { margin: 0 0 4px; color: var(--text); font-size: 13px; letter-spacing: 0; font-weight: 550; }
.footer-links a { font-size: 12px; color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px 28px; margin-top: 48px; padding-top: 22px; border-top: 1px solid var(--border); color: var(--subtle); font-size: 11px; }
.footer-bottom a { text-decoration: none; }
.footer-bottom a:hover { color: var(--accent); }

/* 个人作品示意使用自写文字，避免将概念展示误认为实际界面。 */
.portfolio-meta { display: flex; flex-wrap: wrap; gap: 12px 28px; margin-top: 38px; padding-top: 24px; border-top: 1px solid var(--border); color: var(--subtle); font-size: 12px; }
.portfolio-example { padding: 30px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); }
.portfolio-example .reading-sheet { padding: 32px; }
.portfolio-example .reading-sheet h3 { white-space: normal; font-size: 22px; margin-top: 22px; text-wrap: initial; }
.sample-copy { color: #424a36; font-size: 16px; line-height: 1.95; margin-top: 22px; }
.portfolio-example .sheet-foot { margin-top: 30px; }
.portfolio-example figcaption { margin-top: 18px; color: var(--subtle); font-size: 12px; line-height: 1.85; }
.record-number { display: block; margin-bottom: 24px; color: var(--accent); font: 12px var(--mono); }
.development-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
@media (max-width: 720px) {
  .portfolio-meta { gap: 10px 18px; font-size: 11px; }
  .portfolio-example { padding: 18px; }
  .portfolio-example .reading-pair { grid-template-columns: 1fr; gap: 16px; }
  .portfolio-example .reading-sheet { padding: 24px; }
  .portfolio-example .reading-sheet h3 { font-size: 20px; }
  .sample-copy { font-size: 14px; }
  .development-grid { grid-template-columns: 1fr; }
}

/* 默认完整展示所有图文；只有脚本校验完成后才切换为单一主截图。 */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
.about-guide { max-width: 850px; color: var(--muted); font-size: 15px; }
.about-guide .text-link { margin-left: 12px; color: var(--accent); }
.screenshot-browser { margin-top: 28px; min-width: 0; }
.gallery-stage { position: relative; min-width: 0; }
.gallery-ready .gallery-stage { padding-inline: 64px; }
.gallery-side-controls { position: absolute; top: 1px; left: 65px; right: 65px; aspect-ratio: 1920 / 1150; pointer-events: none; }
.gallery-arrow { position: absolute; top: 50%; display: grid; place-items: center; width: 48px; height: 48px; padding: 0; border: 1px solid var(--border); border-radius: 50%; background: var(--surface); color: var(--text); transform: translateY(-50%); pointer-events: auto; transition: background .18s, color .18s, border-color .18s; }
.gallery-arrow-prev { left: -65px; }
.gallery-arrow-next { right: -65px; }
.gallery-arrow svg { fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.gallery-arrow:hover { background: var(--accent); border-color: var(--accent); color: var(--ink); }
.gallery-arrow[aria-disabled="true"] { color: var(--subtle); cursor: default; }
.gallery-meta { display: flex; align-items: baseline; justify-content: space-between; gap: 12px 24px; margin: 20px 64px 0; }
.gallery-counter { flex-shrink: 0; color: var(--accent); font: 13px/1.7 var(--mono); font-variant-numeric: tabular-nums; }
.gallery-help { color: var(--subtle); font-size: 12px; }
.gallery-viewport { position: relative; display: grid; gap: 28px; min-width: 0; border-radius: var(--radius); }
.gallery-ready .gallery-viewport { display: block; overflow: hidden; }
.gallery-viewport:focus-visible { outline-offset: 6px; }
.gallery-ready .screenshot-card.is-leaving { position: absolute; inset: 0 0 auto; pointer-events: none; }
.gallery-ready .gallery-viewport.is-animating .screenshot-card { will-change: transform; }
.screenshot-browser a { overflow-wrap: anywhere; }
.screenshot-card { min-width: 0; overflow: hidden; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface-soft); }
.screenshot-image { display: block; aspect-ratio: 1920 / 1150; background: #191b20; color: var(--muted); }
.screenshot-image img { width: 100%; height: 100%; object-fit: contain; }
.gallery-ready .screenshot-image { touch-action: pan-y pinch-zoom; user-select: none; -webkit-user-select: none; }
.screenshot-card figcaption { display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; padding: 26px; }
.screenshot-card figcaption > div { min-width: 0; max-width: 850px; }
.screenshot-card figcaption p { margin-top: 9px; color: var(--muted); font-size: 14px; line-height: 1.95; }
.screenshot-card figcaption .demo-disclosure { color: var(--accent); font-size: 13px; font-weight: 600; }
.screenshot-card .image-link { display: inline-flex; align-items: center; min-height: 44px; font-size: 13px; }
.screenshot-index { display: block; margin-bottom: 10px; color: var(--accent); font: 11px var(--mono); letter-spacing: .04em; }
.gallery-thumbnails { display: flex; gap: 12px; max-width: 100%; margin-top: 18px; padding: 6px 6px 12px; overflow-x: auto; overscroll-behavior-x: contain; scrollbar-width: thin; scroll-padding-inline: 6px; }
.gallery-thumbnails button { flex: 0 0 152px; min-width: 0; padding: 5px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface-soft); color: var(--muted); text-align: left; }
.gallery-thumbnails button img { width: 100%; aspect-ratio: 1920 / 1150; object-fit: contain; border-radius: 4px; background: #191b20; }
.gallery-thumbnails button span { display: block; padding: 7px 5px 3px; font-size: 12px; }
.gallery-thumbnails button[aria-pressed="true"] { border-color: var(--accent); box-shadow: inset 0 0 0 1px var(--accent); color: var(--accent); background: #20251b; }
.gallery-thumbnails button:hover { border-color: var(--accent); }
.capture-note { display: flex; align-items: flex-start; gap: 18px; padding: 20px 24px; border-left: 2px solid var(--accent); background: var(--surface); border-radius: 0 10px 10px 0; }
.capture-note .small-label { flex-shrink: 0; }
.capture-note p { color: var(--muted); font-size: 13px; line-height: 1.9; }
.capture-note strong { color: var(--text); font-weight: 600; }
.performance-card { display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; margin-top: 24px; padding: 32px; border: 1px solid #424b34; border-radius: var(--radius); background: var(--surface); }
.performance-card h3 { margin-top: 14px; font-size: 25px; }
.performance-card p:not(.eyebrow) { margin-top: 14px; color: var(--muted); font-size: 14px; }
.performance-card .performance-summary { color: var(--accent) !important; font-size: 18px !important; }
.performance-details { display: grid; gap: 18px; }
.performance-details > div { border-bottom: 1px solid var(--border); padding-bottom: 18px; }
.performance-details > div:last-child { border-bottom: 0; padding-bottom: 0; }
.performance-details dt { font: 12px/1.8 var(--mono); color: var(--accent); }
.performance-details dd { margin-top: 6px; color: var(--muted); font-size: 13px; }
@media (max-width: 720px) {
  .gallery-ready .gallery-stage { margin-inline: -16px; padding-inline: 48px; }
  .gallery-side-controls { left: 49px; right: 49px; }
  .gallery-arrow { width: 44px; height: 44px; }
  .gallery-arrow-prev { left: -49px; }
  .gallery-arrow-next { right: -49px; }
  .gallery-meta { flex-direction: column; gap: 6px; margin-inline: 0; }
  .gallery-thumbnails button { flex-basis: 124px; }
  .screenshot-card figcaption { flex-direction: column; padding: 20px; gap: 12px; }
  .screenshot-card figcaption h3 { font-size: 17px; }
  .capture-note { flex-direction: column; padding: 18px; gap: 12px; }
  .performance-card { grid-template-columns: 1fr; gap: 24px; padding: 24px 20px; }
}

/* 网站说明正文保持可独立阅读，不依赖页面脚本。 */
.policy-shell { max-width: 1120px; margin: 64px auto 0; padding-inline: 36px; }
.policy-heading { padding-bottom: 36px; border-bottom: 1px solid var(--border); }
.policy-heading h1 { font-size: clamp(32px, 5vw, 48px); margin-top: 18px; }
.policy-dates { display: flex; flex-wrap: wrap; gap: 8px 28px; margin-top: 20px; color: var(--muted); font-size: 13px; }
.policy-layout { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 56px; align-items: start; margin-top: 36px; }
.policy-toc { position: sticky; top: calc(var(--header-height) + 24px); padding: 22px 20px; border: 1px solid var(--border); background: var(--surface-soft); border-radius: 12px; }
.policy-toc h2 { font-size: 14px; margin: 0 0 16px; }
.policy-toc ul { list-style: none; padding: 0; display: grid; gap: 12px; }
.policy-toc a { font-size: 12px; color: var(--muted); text-decoration: none; }
.policy-toc a:hover { color: var(--accent); }
.policy-content { color: #d4d6d0; font-size: 15px; line-height: 2; overflow-wrap: anywhere; }
.policy-content section { margin-top: 40px; }
.policy-content h2 { color: var(--text); font-size: 25px; margin: 0 0 18px; }
.policy-content h3 { color: var(--text); font-size: 17px; margin: 28px 0 12px; }
.policy-content p { margin-block: 14px; }
.policy-content a { color: var(--accent); }
.policy-content ul { list-style: none; padding: 0; margin-block: 16px; }
.policy-content li { margin-top: 7px; }
.policy-home-link { font-size: 13px; color: var(--muted); text-decoration: none; padding-block: 10px; }

@media (max-width: 1120px) {
  .container { width: calc(100% - 64px); }
  .site-nav { gap: 20px; }
  .platform-label { display: none; }
  .hero-intro { gap: 32px; }
  h1 { font-size: 46px; }
  .hero-copy > p:first-child { font-size: 14px; }
  .button-row { gap: 16px; }
  .translation-grid { grid-template-columns: 1.15fr 1fr; }
  .reading-sheet { padding: 20px 14px; }
  .reading-sheet h3 { font-size: 14px; }
  .ai-layout { gap: 40px; }
  .model-panel, .faq-layout { gap: 48px; }
  .feature-card { padding: 26px; }
}
@media (max-width: 880px) {
  .header-inner { gap: 12px; flex-wrap: wrap; padding-block: 12px; }
  .site-nav { order: 3; width: 100%; flex-wrap: wrap; gap: 4px 22px; padding-bottom: 8px; }
  .site-nav a { font-size: 13px; padding: 8px 0; }
  .menu-ready .header-inner { flex-wrap: nowrap; padding-block: 0; }
  .menu-ready .site-nav { display: none; position: absolute; top: 100%; inset-inline: 0; padding: 14px 20px 22px; max-height: calc(100dvh - var(--header-height)); overflow-y: auto; background: #151718; border-bottom: 1px solid var(--border); box-shadow: 0 20px 30px #0005; }
  .menu-ready .site-nav.is-open { display: flex; flex-direction: column; align-items: stretch; gap: 0; }
  .menu-ready .site-nav a { font-size: 15px; padding: 11px 4px; }
  .nav-toggle { display: block; }
  .hero { padding-top: 46px; }
  .hero-intro { grid-template-columns: 1fr; gap: 26px; margin-top: 24px; }
  h1 { font-size: 48px; }
  .hero-copy { max-width: 580px; }
  .hero-copy > p:first-child { font-size: 16px; }
  .hero-copy > p:first-child br { display: none; }
  .button-row { margin-top: 22px; }
  .product-preview { margin-top: 36px; }
  .capability-strip { grid-template-columns: 1fr 1fr; gap: 20px; }
  .capability-strip > div { justify-content: flex-start !important; border-right: 0; }
  .section { padding-top: 80px; }
  .section-heading { display: block; margin-bottom: 30px; }
  .section-heading > .section-description { margin-top: 20px; max-width: 580px; }
  .translation-grid { grid-template-columns: 1fr; }
  .translation-notes { grid-template-columns: 1fr; }
  .reading-sheet { padding: 26px; }
  .reading-sheet h3 { font-size: 18px; }
  .ai-layout { grid-template-columns: 1fr; }
  .ai-copy { max-width: 580px; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-card:nth-child(3n) { border-right: 1px solid var(--border); }
  .feature-card:nth-child(2n) { border-right: 0; }
  .feature-card:nth-last-child(-n+3) { border-bottom: 1px solid var(--border); }
  .feature-card:nth-last-child(-n+2) { border-bottom: 0; }
  .model-panel { grid-template-columns: 1fr; gap: 30px; }
  .privacy-panel { padding: 32px; }
  .privacy-heading { align-items: flex-start; }
  .privacy-grid { gap: 24px; }
  .faq-layout { grid-template-columns: 1fr; gap: 32px; }
  .site-footer { margin-top: 80px; }
  .footer-main { gap: 32px; grid-template-columns: 1.5fr 1fr 1fr; }
  .policy-layout { grid-template-columns: 1fr; gap: 24px; }
  .policy-toc { position: static; }
  .policy-toc ul { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 720px) {
  :root { --header-height: 66px; }
  .container { width: calc(100% - 40px); }
  .brand { font-size: 21px; }
  .brand img { width: 24px; height: 24px; }
  .hero { padding-top: 38px; }
  .eyebrow { font-size: 11px; }
  h1 { font-size: clamp(31px, 7.8vw, 48px); letter-spacing: -.055em; line-height: 1.45; }
  .hero-intro { margin-top: 20px; gap: 24px; }
  .hero-copy > p:first-child { font-size: 14px; }
  .hero-note { font-size: 11px; }
  .button { font-size: 13px; padding-inline: 16px; gap: 20px; }
  .text-link { font-size: 13px; gap: 8px; }
  .button-row { gap: 18px; }
  .preview-toolbar { padding: 10px; justify-content: center; }
  .preview-brand, .preview-type { display: none; }
  .preview-tabs { width: 100%; justify-content: space-between; }
  .preview-tab { flex: 1; padding: 8px 5px; font-size: 11px; min-height: 38px; }
  .product-preview figcaption { padding: 12px; gap: 12px; font-size: 10px; align-items: flex-start; }
  .product-preview figcaption > span { max-width: 75%; }
  .capability-strip { padding-block: 22px; gap: 14px 10px; }
  .capability-strip > div { gap: 10px; font-size: 11px; }
  .mono { font-size: 10px; }
  h2 { font-size: 29px; }
  .section-description { font-size: 14px; }
  .translation-main { padding: 20px; }
  .reading-pair { gap: 10px; }
  .reading-sheet { padding: 20px 12px; }
  .sheet-label { font-size: 8px; letter-spacing: 0; }
  .reading-sheet h3 { font-size: 12px; }
  .sheet-foot { font-size: 10px; }
  .document-lines { gap: 10px; margin-block: 20px; }
  .language-row { gap: 8px 14px; font-size: 10px; }
  .note-card { padding: 20px; }
  .feature-card { padding: 24px 20px; }
  .feature-card h3 { font-size: 15px; }
  .feature-card p { font-size: 12px; }
  .feature-icon { margin-bottom: 18px; }
  .ai-figure { padding: 12px; }
  .ai-figure figcaption { font-size: 11px; }
  .connection-card { padding: 22px; }
  .model-panel h2, .faq-intro h2 { font-size: 28px; }
  .privacy-panel { padding: 28px 24px; }
  .privacy-heading { display: block; }
  .privacy-heading .button { margin-top: 24px; }
  .privacy-grid { grid-template-columns: 1fr; margin-top: 28px; gap: 28px; padding-top: 28px; }
  .privacy-index { margin-bottom: 8px; }
  .privacy-grid p { margin-top: 8px; }
  .privacy-footnote { margin-top: 24px; }
  .faq-item summary { font-size: 14px; }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 32px 20px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 12px; margin-top: 32px; }
  .policy-shell { margin-top: 36px; padding-inline: 20px; }
  .policy-content { font-size: 14px; }
  .policy-toc { padding: 20px 16px; }
  .policy-toc ul { gap: 12px 16px; }
  .policy-toc a { font-size: 11px; }
  .policy-content h2 { font-size: 22px; }
}
@media (max-width: 420px) {
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { border-right: 0 !important; border-bottom: 1px solid var(--border) !important; }
  .feature-card:last-child { border-bottom: 0 !important; }
  .feature-card p { font-size: 13px; }
  .reading-sheet h3 { font-size: 11px; }
  .connection-card dl > div { grid-template-columns: 64px 1fr; gap: 8px; }
  .capability-strip > div { gap: 7px; font-size: 10px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
  .button:hover { transform: none; }
}
@media print {
  :root { color-scheme: light; --bg: #fff; --text: #000; --muted: #333; --subtle: #444; --accent: #222; --border: #bbb; }
  body { background: #fff; color: #000; }
  .site-header, .site-footer, .skip-link, .policy-toc, .gallery-side-controls, .gallery-meta, .gallery-thumbnails, [data-gallery-status] { display: none !important; }
  .gallery-ready .gallery-stage { padding: 0; margin: 0; }
  .gallery-ready .gallery-viewport { display: grid; overflow: visible; }
  #galleryViewport [data-gallery-slide] { display: block !important; position: static !important; transform: none !important; break-inside: avoid; }
  .screenshot-card { background: #fff; }
  .section { padding-top: 32px; }
  .policy-shell { max-width: none; margin: 0; padding: 0; }
  .policy-layout { display: block; }
  .policy-content { color: #222; font-size: 11pt; }
  .policy-content h2, .policy-content h3 { break-after: avoid; }
  .policy-content p, .policy-content li { orphans: 3; widows: 3; }
  .policy-content a { text-decoration: none; }
}