/* Hallmark · genre: editorial · macrostructure: Catalogue · theme: Aurora Table · enrichment: Tier A · nav: N6 · footer: Ft1 · contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (34, 49, 50–57) */
:root {
  --color-ink: #101923;
  --color-ink-soft: #273643;
  --color-paper: #f4f0e8;
  --color-paper-2: #e8e1d3;
  --color-paper-3: #d6ccbb;
  --color-accent: #b8f24a;
  --color-accent-ink: #102111;
  --color-coral: #ff8e73;
  --color-purple: #ad8aff;
  --color-muted: #66737e;
  --color-line: #b9b09f;
  --color-focus: #ffffff;
  --font-display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --space-1: .375rem;
  --space-2: .75rem;
  --space-3: 1.125rem;
  --space-4: 1.5rem;
  --space-5: 2.25rem;
  --space-6: 3.5rem;
  --space-7: 5rem;
  --space-8: 7rem;
  --max-width: 72rem;
  --radius-sm: .4rem;
  --radius-md: .9rem;
  --shadow-offset: 8px 8px 0 var(--color-ink);
  --z-nav: 300;
  --z-modal: 500;
}

* { box-sizing: border-box; }
html { overflow-x: clip; scroll-behavior: smooth; }
body { margin: 0; overflow-x: clip; color: var(--color-ink); background: var(--color-paper); font-family: var(--font-body); font-size: 1rem; line-height: 1.7; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration-thickness: .08em; text-underline-offset: .2em; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
main { min-width: 0; }
h1, h2, h3, p { min-width: 0; overflow-wrap: anywhere; }
h1, h2, h3 { margin: 0; font-family: var(--font-display); font-style: normal; line-height: 1.08; letter-spacing: -.045em; }
h1 { font-size: clamp(2.8rem, 7vw, 6.3rem); max-width: 8.5ch; }
h2 { font-size: clamp(2rem, 4.5vw, 4.3rem); }
h3 { font-size: clamp(1.1rem, 1.8vw, 1.45rem); }
p { max-width: 68ch; }
::selection { color: var(--color-accent-ink); background: var(--color-accent); }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }

.skip-link { position: fixed; z-index: var(--z-modal); top: .75rem; left: .75rem; padding: .55rem .8rem; color: var(--color-accent-ink); background: var(--color-accent); transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }
.container { width: min(calc(100% - 2rem), var(--max-width)); margin-inline: auto; }
.eyebrow { margin: 0 0 var(--space-3); color: var(--color-muted); font: 700 .75rem/1.1 var(--font-mono); letter-spacing: .16em; text-transform: uppercase; }
.eyebrow::before { content: "// "; color: var(--color-coral); }
.muted { color: var(--color-muted); }
.section { padding-block: var(--space-7); }
.section--dark { color: var(--color-paper); background: var(--color-ink); }
.section--dark .muted, .section--dark .eyebrow { color: var(--color-paper-3); }
.section-head { display: block; margin-bottom: var(--space-5); max-width: 44rem; }
.section-head p { margin: var(--space-3) 0 0; color: var(--color-muted); }
.section--dark .section-head p { color: var(--color-paper-3); }
.rule { height: 1px; margin-block: var(--space-5); background: var(--color-line); }

.site-nav { position: sticky; z-index: var(--z-nav); top: 0; color: var(--color-paper); background: color-mix(in srgb, var(--color-ink) 94%, transparent); border-bottom: 1px solid var(--color-ink-soft); backdrop-filter: blur(14px); }
.site-nav__inner { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: var(--space-4); width: min(calc(100% - 2rem), var(--max-width)); min-height: 4.4rem; margin-inline: auto; }
.site-nav__brand { display: flex; align-items: center; gap: .6rem; min-width: 0; color: var(--color-paper); text-decoration: none; }
.site-nav__brand-mark { display: grid; width: 2.2rem; height: 2.2rem; place-items: center; color: var(--color-accent-ink); background: var(--color-accent); font: 900 1.1rem/1 var(--font-mono); }
.site-nav__brand-text { max-width: 12ch; font-weight: 800; line-height: 1.1; overflow-wrap: anywhere; }
.site-nav__links { display: flex; justify-content: center; gap: clamp(.65rem, 2.4vw, 2rem); margin: 0; padding: 0; list-style: none; }
.site-nav__link { display: inline-block; padding: .45rem 0; color: var(--color-paper-3); font-size: .9rem; font-weight: 700; white-space: nowrap; text-decoration: none; }
.site-nav__link:hover, .site-nav__link[aria-current="page"] { color: var(--color-accent); }
.site-nav__toggle { display: none; width: 2.7rem; height: 2.7rem; color: var(--color-paper); background: transparent; border: 1px solid var(--color-paper-3); cursor: pointer; }
.site-nav__toggle-lines, .site-nav__toggle-lines::before, .site-nav__toggle-lines::after { display: block; width: 1.2rem; height: 2px; margin-inline: auto; background: currentColor; }
.site-nav__toggle-lines { position: relative; }
.site-nav__toggle-lines::before, .site-nav__toggle-lines::after { position: absolute; content: ""; left: 0; }
.site-nav__toggle-lines::before { top: -.35rem; }
.site-nav__toggle-lines::after { top: .35rem; }

.button { display: inline-flex; position: relative; align-items: center; justify-content: center; min-height: 2.9rem; padding: .7rem 1rem; border: 1px solid transparent; font-weight: 800; line-height: 1; white-space: nowrap; text-decoration: none; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease; }
.button:hover { transform: translate(-2px, -2px); }
.button--primary { color: var(--color-accent-ink); background: var(--color-accent); box-shadow: 4px 4px 0 var(--color-coral); }
.button--primary:hover { box-shadow: 7px 7px 0 var(--color-coral); }
.button--outline { color: var(--color-paper); border-color: var(--color-paper-3); background: transparent; }
.button--outline:hover { color: var(--color-accent-ink); background: var(--color-accent); border-color: var(--color-accent); }
.button--quiet { color: var(--color-ink); border-color: var(--color-line); background: transparent; }
.button--quiet:hover { background: var(--color-paper-2); }
.button--large { min-height: 4.4rem; padding-inline: 1.6rem; font-size: 1.12rem; }
.button--shine::after { position: absolute; inset: 0; content: ""; background: linear-gradient(110deg, transparent 28%, color-mix(in srgb, var(--color-paper) 70%, transparent) 46%, transparent 60%); transform: translateX(-120%); animation: shine 3.8s ease-in-out infinite; pointer-events: none; }
@keyframes shine { 0%, 55% { transform: translateX(-120%); } 76%, 100% { transform: translateX(120%); } }

.hero { position: relative; min-height: min(47rem, calc(100svh - 4.4rem)); color: var(--color-paper); background: var(--color-ink); isolation: isolate; }
.hero::before { position: absolute; z-index: -1; inset: 0; content: ""; background: linear-gradient(90deg, color-mix(in srgb, var(--color-ink) 92%, transparent) 0%, color-mix(in srgb, var(--color-ink) 70%, transparent) 47%, color-mix(in srgb, var(--color-ink) 34%, transparent) 100%); }
.hero__media { position: absolute; z-index: -2; inset: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.9) contrast(1.05); }
.hero__content { display: flex; flex-direction: column; justify-content: flex-end; min-height: min(47rem, calc(100svh - 4.4rem)); padding: 5rem max(1rem, calc((100vw - var(--max-width)) / 2)) 7rem; }
.hero__meta { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: var(--space-4); }
.hero__meta span { padding: .25rem .55rem; color: var(--color-accent); border: 1px solid color-mix(in srgb, var(--color-accent) 65%, transparent); font: 700 .7rem/1 var(--font-mono); letter-spacing: .05em; white-space: nowrap; }
.hero h1 { max-width: 10ch; color: var(--color-paper); }
.hero h1 span { display: block; margin-top: .8rem; color: var(--color-paper-3); font-size: clamp(1.05rem, 2vw, 1.45rem); font-weight: 500; line-height: 1.35; letter-spacing: -.02em; }
.hero__lede { margin: var(--space-4) 0 0; max-width: 40rem; color: var(--color-paper-2); font-size: clamp(1.05rem, 2vw, 1.35rem); line-height: 1.65; }
.hero__actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: var(--space-5); }
.hero__note { margin-top: var(--space-3); color: var(--color-paper-3); font-size: .8rem; }

.info-strip { color: var(--color-paper); background: var(--color-ink-soft); }
.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.info-item { padding: 1.35rem 1rem; border-right: 1px solid color-mix(in srgb, var(--color-paper-3) 30%, transparent); border-bottom: 1px solid color-mix(in srgb, var(--color-paper-3) 30%, transparent); }
.info-item:nth-child(2n) { border-right: 0; }
.info-item dt { color: var(--color-paper-3); font: 700 .7rem/1.2 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.info-item dd { margin: .45rem 0 0; font-weight: 800; }
.info-item small { display: block; margin-top: .35rem; color: var(--color-paper-3); font-size: .72rem; }

.intro-grid { display: grid; gap: var(--space-6); }
.intro-lede { max-width: 22ch; font-size: clamp(1.7rem, 3vw, 3rem); font-weight: 800; line-height: 1.2; letter-spacing: -.045em; }
.prose { max-width: 68ch; font-size: 1.05rem; }
.prose p { margin: 0 0 1.2rem; }
.prose p:last-child { margin-bottom: 0; }

.feature-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--color-line); border: 1px solid var(--color-line); }
.feature-card { min-height: 12rem; padding: 1.4rem; background: var(--color-paper); transition: transform .24s ease, box-shadow .24s ease; }
.feature-card:hover { position: relative; z-index: 1; transform: translateY(-6px); box-shadow: var(--shadow-offset); }
.feature-card__mark { display: block; width: 2.2rem; height: 2.2rem; margin-bottom: var(--space-4); padding-top: .5rem; color: var(--color-accent-ink); background: var(--color-accent); font: 900 .8rem/1 var(--font-mono); text-align: center; }
.feature-card p { margin: .65rem 0 0; color: var(--color-muted); font-size: .92rem; }

.gallery-preview { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .75rem; }
.gallery-card { position: relative; margin: 0; overflow: hidden; background: var(--color-ink); border: 1px solid var(--color-ink); cursor: zoom-in; }
.gallery-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .35s ease, filter .35s ease; }
.gallery-card:hover img { transform: scale(1.04); filter: brightness(1.08); }
.gallery-card figcaption { padding: .65rem .75rem; color: var(--color-paper-2); font-size: .78rem; line-height: 1.4; }
.gallery-card--hero { grid-column: 1 / -1; }

.timeline { display: grid; gap: 1px; background: var(--color-line); border: 1px solid var(--color-line); }
.timeline-item { display: grid; grid-template-columns: 6rem 1fr; gap: var(--space-4); padding: 1.2rem; background: var(--color-paper-2); }
.timeline-item__date { color: var(--color-coral); font: 700 .78rem/1.3 var(--font-mono); }
.timeline-item p { margin: .4rem 0 0; color: var(--color-muted); font-size: .92rem; }
.timeline-item--pending { opacity: .7; }

.review-grid { display: grid; gap: 1rem; }
.review-card { padding: 1.35rem; color: var(--color-paper); background: var(--color-ink-soft); border-left: 4px solid var(--color-coral); }
.review-card p { margin: 0; font-size: 1rem; }
.review-card__source { display: block; margin-top: 1rem; color: var(--color-paper-3); font: .72rem/1.4 var(--font-mono); }
.audience-note { padding: 1.1rem; color: var(--color-accent-ink); background: var(--color-accent); }
.audience-note p { margin: 0; font-size: .9rem; }

.faq-list { border-top: 1px solid var(--color-line); }
.faq-item { border-bottom: 1px solid var(--color-line); }
.faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.1rem 0; font-weight: 800; cursor: pointer; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; color: var(--color-coral); font: 1.4rem/1 var(--font-mono); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding: 0 2rem 1.2rem 0; color: var(--color-muted); }
.faq-answer p { margin: 0; }

.final-cta { color: var(--color-paper); background: var(--color-ink); }
.final-cta__inner { display: grid; gap: var(--space-5); align-items: end; }
.final-cta h2 { max-width: 12ch; }
.final-cta p { margin: 0; color: var(--color-paper-3); }
.final-cta__actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.site-footer { color: var(--color-paper-3); background: var(--color-ink); border-top: 1px solid var(--color-ink-soft); }
.site-footer__top { display: grid; gap: var(--space-5); padding-block: var(--space-6); }
.site-footer__brand { color: var(--color-paper); font-size: 1.2rem; font-weight: 900; }
.site-footer__logo { width: min(16rem, 100%); margin-bottom: .75rem; }
.site-footer__tagline { margin: .65rem 0 0; max-width: 32ch; font-size: .9rem; }
.site-footer__links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.site-footer__links h3 { margin-bottom: .7rem; color: var(--color-paper); font-size: .85rem; letter-spacing: 0; }
.site-footer__links a { display: block; margin: .35rem 0; color: var(--color-paper-3); font-size: .86rem; text-decoration: none; }
.site-footer__links a:hover { color: var(--color-accent); }
.site-footer__bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .75rem; padding-block: 1rem; border-top: 1px solid var(--color-ink-soft); font-size: .72rem; }

.page-hero { padding-block: 6rem 4rem; color: var(--color-paper); background: var(--color-ink); }
.page-hero h1 { max-width: 12ch; }
.page-hero p { margin: var(--space-4) 0 0; max-width: 50ch; color: var(--color-paper-3); }
.page-hero__meta { margin-top: var(--space-4); color: var(--color-accent); font: .75rem/1.4 var(--font-mono); }
.page-layout { display: grid; gap: var(--space-6); }
.toc { align-self: start; padding: 1rem; background: var(--color-paper-2); border-left: 3px solid var(--color-coral); }
.toc strong { display: block; margin-bottom: .6rem; font-size: .8rem; }
.toc a { display: block; margin: .38rem 0; font-size: .85rem; }
.download-grid { display: grid; gap: 1rem; }
.platform-card { padding: 1.4rem; background: var(--color-paper-2); border-top: 5px solid var(--color-purple); }
.platform-card--recommended { border-top-color: var(--color-accent); box-shadow: var(--shadow-offset); }
.platform-card__label { display: inline-block; margin-bottom: 1rem; color: var(--color-muted); font: 700 .7rem/1 var(--font-mono); letter-spacing: .1em; }
.platform-card p { margin: .6rem 0 1.2rem; color: var(--color-muted); }
.steps { display: grid; gap: 1px; background: var(--color-line); border: 1px solid var(--color-line); }
.step { display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; padding: 1.15rem; background: var(--color-paper-2); }
.step__number { color: var(--color-coral); font: 900 1.2rem/1 var(--font-mono); }
.step p { margin: .35rem 0 0; color: var(--color-muted); font-size: .9rem; }
.requirements { width: 100%; border-collapse: collapse; background: var(--color-paper-2); }
.requirements th, .requirements td { padding: .8rem; border: 1px solid var(--color-line); text-align: left; vertical-align: top; }
.requirements th { font-size: .78rem; }
.requirements td { color: var(--color-muted); font-size: .85rem; }
.tab-list { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: var(--space-4); }
.tab-button { padding: .55rem .8rem; color: var(--color-ink); background: transparent; border: 1px solid var(--color-line); font-weight: 800; cursor: pointer; }
.tab-button[aria-selected="true"], .tab-button:hover { color: var(--color-accent-ink); background: var(--color-accent); border-color: var(--color-accent); }
.article-grid { display: grid; gap: 1rem; }
.article-card { display: flex; flex-direction: column; justify-content: space-between; min-height: 14rem; padding: 1.25rem; background: var(--color-paper-2); border-top: 3px solid var(--color-ink); }
.article-card p { margin: .7rem 0 1rem; color: var(--color-muted); font-size: .9rem; }
.article-card__meta { display: flex; justify-content: space-between; gap: .75rem; color: var(--color-coral); font: .73rem/1.3 var(--font-mono); }
.article-card__meta a { white-space: nowrap; }
.article-body { max-width: 70ch; }
.article-body h2 { margin: var(--space-6) 0 var(--space-3); font-size: clamp(1.6rem, 3vw, 2.5rem); }
.article-body h3 { margin: var(--space-5) 0 var(--space-2); }
.article-body p { margin: 0 0 1rem; }
.article-body ul, .article-body ol { padding-left: 1.3rem; }
.article-body li { margin: .45rem 0; }
.article-body table { width: 100%; margin-block: 1.2rem; border-collapse: collapse; }
.article-body th, .article-body td { padding: .65rem; border: 1px solid var(--color-line); text-align: left; vertical-align: top; }
.article-body th { background: var(--color-paper-2); }
.callout { margin-block: 1.3rem; padding: 1rem; background: var(--color-accent); color: var(--color-accent-ink); }
.source-note { margin-top: var(--space-5); padding-top: 1rem; color: var(--color-muted); border-top: 1px solid var(--color-line); font-size: .78rem; }

.lightbox { position: fixed; z-index: var(--z-modal); inset: 0; display: grid; place-items: center; padding: 1rem; background: color-mix(in srgb, var(--color-ink) 94%, transparent); }
.lightbox[hidden] { display: none; }
.lightbox__figure { position: relative; width: min(92vw, 70rem); margin: 0; }
.lightbox__image { width: 100%; max-height: 80vh; object-fit: contain; }
.lightbox__caption { margin-top: .7rem; color: var(--color-paper-3); font-size: .82rem; text-align: center; }
.lightbox__close, .lightbox__prev, .lightbox__next { position: absolute; display: grid; width: 2.8rem; height: 2.8rem; place-items: center; color: var(--color-paper); background: var(--color-ink-soft); border: 1px solid var(--color-paper-3); cursor: pointer; }
.lightbox__close { top: -3.5rem; right: 0; }
.lightbox__prev { top: 50%; left: -3.5rem; transform: translateY(-50%); }
.lightbox__next { top: 50%; right: -3.5rem; transform: translateY(-50%); }

@media (min-width: 40rem) {
  .container { width: min(calc(100% - 3rem), var(--max-width)); }
  .info-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .info-item:nth-child(2n) { border-right: 1px solid color-mix(in srgb, var(--color-paper-3) 30%, transparent); }
  .info-item:nth-child(3n) { border-right: 0; }
  .intro-grid { grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr); align-items: start; }
  .review-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .download-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .article-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .final-cta__inner { grid-template-columns: minmax(0, 1fr) minmax(0, .8fr); }
  .site-footer__top { grid-template-columns: 1.1fr 1fr; }
  .page-layout { grid-template-columns: minmax(0, 1fr) 15rem; align-items: start; }
  .toc { position: sticky; top: 5.4rem; }
}
@media (min-width: 64rem) {
  .container { width: min(calc(100% - 4rem), var(--max-width)); }
  .hero__content { padding-left: max(2rem, calc((100vw - var(--max-width)) / 2)); padding-right: max(2rem, calc((100vw - var(--max-width)) / 2)); }
  .feature-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .gallery-preview { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .gallery-card--hero { grid-column: span 2; grid-row: span 2; }
  .site-footer__top { grid-template-columns: 1.2fr 2fr; }
  .site-footer__links { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 52rem) {
  .site-nav__inner { grid-template-columns: auto auto; justify-content: space-between; }
  .site-nav__links, .site-nav__inner > .button { display: none; }
  .site-nav__toggle { display: block; }
  .site-nav[data-open="true"] .site-nav__toggle-lines { background: transparent; }
  .site-nav[data-open="true"] .site-nav__toggle-lines::before { top: 0; transform: rotate(45deg); }
  .site-nav[data-open="true"] .site-nav__toggle-lines::after { top: 0; transform: rotate(-45deg); }
  .site-nav__mobile { display: none; padding: .5rem 1rem 1rem; border-top: 1px solid var(--color-ink-soft); }
  .site-nav[data-open="true"] .site-nav__mobile { display: block; }
  .site-nav__mobile a { display: block; padding: .7rem 0; color: var(--color-paper); font-weight: 800; text-decoration: none; border-bottom: 1px solid var(--color-ink-soft); }
}
@media (max-width: 39.99rem) {
  .hero__content { padding-top: 4rem; padding-bottom: 5rem; }
  .hero h1 { font-size: clamp(2.45rem, 13vw, 4rem); }
  .gallery-preview, .feature-grid { grid-template-columns: minmax(0, 1fr); }
  .gallery-card--hero { grid-column: auto; }
  .timeline-item { grid-template-columns: 1fr; gap: .5rem; }
  .lightbox__prev { left: .4rem; }
  .lightbox__next { right: .4rem; }
  .lightbox__close { top: -3.4rem; right: .2rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .001ms !important; transition-duration: .001ms !important; }
}