/* Hallmark · pre-emit critique: P5 H5 E5 S5 R4 V5 · genre: editorial · theme: Summer Nocturne */
@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;700;900&display=swap");
:root {
  --color-ink: #121c2b;
  --color-ink-soft: #3e4e5e;
  --color-night: #0d1626;
  --color-night-soft: #17283b;
  --color-paper: #f6f0e5;
  --color-paper-deep: #e9dfd0;
  --color-line: #cdbfae;
  --color-light: #fffaf1;
  --color-accent: #ff6b4a;
  --color-accent-deep: #b84636;
  --color-accent-soft: #8ce8dc;
  --color-focus: #1a9d91;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Noto Sans SC", "PingFang SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --max-width: 74rem;
  --radius: 6px;
  --shadow: 0 18px 50px rgba(13, 22, 38, .14);
}
html { scroll-behavior: smooth; overflow-x: clip; background: var(--color-paper); }
body { margin: 0; overflow-x: clip; background: var(--color-paper); color: var(--color-ink); font-family: var(--font-body); line-height: 1.75; }
*, *::before, *::after { box-sizing: border-box; }
img { display: block; max-width: 100%; }
a { color: inherit; }
h1, h2, h3, p, dl, figure, ol, ul { margin: 0; }
h1, h2, h3 { overflow-wrap: anywhere; font-family: var(--font-display); font-style: normal; line-height: 1.08; }
h2 { font-size: clamp(2rem, 5vw, 4.7rem); letter-spacing: -.06em; }
h3 { font-size: 1.35rem; }
p { color: var(--color-ink-soft); }
.site-shell { width: min(var(--max-width), calc(100% - 2rem)); margin-inline: auto; }
.narrow { width: min(52rem, calc(100% - 2rem)); }
.site-header { position: fixed; z-index: 20; inset: 0 0 auto; padding: .75rem 1rem; pointer-events: none; }
.nav-float { display: flex; min-height: 3.5rem; align-items: center; gap: .85rem; margin-inline: auto; padding: .35rem .45rem .35rem .7rem; border: 1px solid rgba(255,250,241,.28); border-radius: var(--radius); background: rgba(13,22,38,.88); box-shadow: var(--shadow); color: var(--color-light); pointer-events: auto; backdrop-filter: blur(14px); }
.brand-mark { display: flex; align-items: center; gap: .55rem; min-width: max-content; color: var(--color-accent-soft); font: 700 .72rem/1 var(--font-mono); letter-spacing: .08em; text-decoration: none; }
.brand-mark img { border-radius: 50%; object-fit: cover; }
.nav-links { display: flex; align-items: center; gap: .15rem; margin-inline: auto; }
.nav-links a, .nav-cta, .menu-toggle { display: inline-flex; min-height: 2.5rem; align-items: center; justify-content: center; border: 0; background: transparent; color: var(--color-light); padding: .4rem .65rem; font: 700 .82rem/1 var(--font-body); text-decoration: none; white-space: nowrap; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--color-accent-soft); }
.nav-cta { border-radius: 4px; background: var(--color-accent); }
.menu-toggle { display: none; cursor: pointer; }
.hero { position: relative; display: flex; min-height: min(54rem, 94svh); align-items: flex-end; isolation: isolate; overflow: clip; background: var(--color-night); color: var(--color-light); }
.hero-art, .hero-shade { position: absolute; z-index: -2; inset: 0; width: 100%; height: 100%; }
.hero-art { object-fit: cover; object-position: 54% center; filter: saturate(.86) contrast(1.04); }
.hero-shade { z-index: -1; background: linear-gradient(90deg, rgba(13,22,38,.96) 0%, rgba(13,22,38,.66) 42%, rgba(13,22,38,.16) 100%), linear-gradient(0deg, rgba(13,22,38,.92), transparent 58%); }
.hero-content { padding-block: 8rem 6rem; }
.kicker, .section-label, .platform-label, .feature-code { color: var(--color-accent-soft); font: 700 .72rem/1.25 var(--font-mono); letter-spacing: .12em; }
.hero h1 { max-width: 10ch; margin-block: 1.25rem 1rem; color: var(--color-light); font-size: clamp(3rem, 10vw, 8.6rem); letter-spacing: -.09em; }
.hero h1 span { display: block; max-width: 28ch; margin-top: 1rem; color: var(--color-accent-soft); font: 500 clamp(.9rem, 2vw, 1.45rem)/1.35 var(--font-mono); letter-spacing: -.04em; }
.hero-lede { max-width: 33rem; color: var(--color-light); font-size: clamp(1rem, 2vw, 1.22rem); }
.hero-tags, .hero-actions, .filter-tabs, .article-links { display: flex; flex-wrap: wrap; gap: .65rem; }
.hero-tags { margin-top: 1.4rem; }
.hero-tags span { border-block: 1px solid rgba(255,250,241,.35); padding: .28rem .55rem; color: var(--color-light); font: .7rem/1.1 var(--font-mono); letter-spacing: .06em; }
.hero-actions { margin-top: 1.8rem; }
.hero-meta { position: absolute; right: 1rem; bottom: 1.2rem; left: 1rem; display: flex; justify-content: space-between; color: rgba(255,250,241,.65); font: .64rem/1 var(--font-mono); letter-spacing: .1em; }
.button { position: relative; display: inline-flex; min-height: 3rem; align-items: center; justify-content: center; gap: .5rem; border: 1px solid var(--color-ink); border-radius: var(--radius); padding: .78rem 1rem; font-weight: 700; line-height: 1; text-decoration: none; white-space: nowrap; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(13,22,38,.17); }
.button:focus-visible, .nav-links a:focus-visible, .menu-toggle:focus-visible, .filter-tabs button:focus-visible, summary:focus-visible, .lightbox button:focus-visible, .modal button:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.button:active { transform: translateY(0); }
.button--large { min-height: 3.7rem; padding-inline: 1.35rem; font-size: 1.02rem; }
.button--accent { overflow: clip; border-color: var(--color-accent); background: var(--color-accent); color: var(--color-light); }
.button--accent::after { position: absolute; inset: -20% auto -20% -35%; width: 26%; background: var(--color-accent-soft); content: ""; opacity: .62; transform: skewX(-22deg); animation: sheen 3.8s ease-in-out infinite; }
.button--ghost, .button--line { border-color: rgba(255,250,241,.55); background: transparent; color: var(--color-light); }
.button--line { border-color: var(--color-accent-deep); color: var(--color-accent-deep); }
.text-link { color: var(--color-accent-deep); font-weight: 700; text-decoration: none; white-space: nowrap; }
.info-strip { position: relative; z-index: 2; margin-top: -1.8rem; border-top: 3px solid var(--color-accent); background: var(--color-light); box-shadow: var(--shadow); }
.info-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); }
.info-item { min-width: 0; border-bottom: 1px solid var(--color-line); padding: 1rem; }
.info-item:nth-child(odd) { border-right: 1px solid var(--color-line); }
.info-item dt { color: var(--color-ink-soft); font: .68rem/1.2 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; }
.info-item dd { margin-top: .3rem; font-weight: 700; overflow-wrap: anywhere; }
.section { padding-block: clamp(4rem, 9vw, 8rem); }
.section-muted { background: var(--color-paper-deep); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 3rem; }
.section-head > p { max-width: 28rem; }
.section-head h2 { margin-top: .7rem; }
.story-grid { display: grid; gap: 2rem; }
.story-copy { max-width: 48rem; }
.story-copy p { margin-bottom: 1.25rem; font-size: clamp(1.08rem, 1.6vw, 1.4rem); line-height: 1.95; }
.feature-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); border-top: 1px solid var(--color-line); }
.feature-card { display: grid; min-width: 0; gap: .65rem; border-bottom: 1px solid var(--color-line); padding: 1.5rem 0; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.feature-card:hover { transform: translateY(-3px); background: var(--color-paper-deep); box-shadow: 0 10px 24px rgba(13,22,38,.08); }
.feature-card p { max-width: 33rem; }
.gallery-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 1rem; }
.gallery-card { min-width: 0; margin: 0; }
.gallery-card button { position: relative; display: block; width: 100%; overflow: clip; border: 0; padding: 0; background: var(--color-night); cursor: zoom-in; }
.gallery-card img { width: 100%; aspect-ratio: 1.5; object-fit: cover; transition: transform .28s ease, filter .28s ease; }
.gallery-card button:hover img { transform: scale(1.035); filter: saturate(1.08); }
.gallery-index { position: absolute; right: .7rem; bottom: .7rem; border: 1px solid rgba(255,250,241,.5); background: rgba(13,22,38,.75); color: var(--color-light); padding: .25rem .45rem; font: .65rem/1 var(--font-mono); }
.gallery-card figcaption { display: flex; justify-content: space-between; padding-top: .6rem; color: var(--color-ink-soft); font: .68rem/1 var(--font-mono); }
.download-band, .final-cta { background: var(--color-night); color: var(--color-light); }
.download-band { padding-block: clamp(4rem, 8vw, 7rem); }
.download-band-inner { display: flex; align-items: end; justify-content: space-between; gap: 2rem; }
.download-band h2, .final-cta h2 { max-width: 12ch; margin-top: .7rem; color: var(--color-light); }
.download-band p, .final-cta p { max-width: 40rem; margin-top: 1rem; color: var(--color-light); }
.timeline { margin-top: 2rem; border-top: 1px solid var(--color-line); }
.timeline > div { display: grid; grid-template-columns: 3.2rem minmax(0,1fr); gap: 1rem; border-bottom: 1px solid var(--color-line); padding-block: 1.4rem; }
.timeline > div > span { color: var(--color-accent-deep); font: .78rem/1 var(--font-mono); }
.timeline h3 { margin-bottom: .4rem; }
.fit-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); border-top: 1px solid var(--color-line); }
.fit-grid article { border-bottom: 1px solid var(--color-line); padding: 1.4rem 0; }
.fit-grid span { color: var(--color-accent-deep); font: .72rem/1 var(--font-mono); }
.fit-grid h3 { margin: .65rem 0 .35rem; }
.faq-list { border-top: 1px solid var(--color-line); }
.faq-item { border-bottom: 1px solid var(--color-line); }
.faq-item summary { display: flex; min-height: 4.2rem; align-items: center; justify-content: space-between; gap: 1rem; cursor: pointer; font-weight: 700; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary span { color: var(--color-accent-deep); font: 1.4rem/1 var(--font-mono); }
.faq-item[open] summary span { transform: rotate(45deg); }
.faq-answer { max-width: 48rem; padding: 0 2rem 1.2rem 0; }
.article-cluster { padding-block: 4rem; background: var(--color-paper-deep); }
.article-grid, .article-index { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); border-top: 1px solid var(--color-line); }
.article-link { display: flex; justify-content: space-between; gap: 1rem; border-bottom: 1px solid var(--color-line); padding: 1rem 0; text-decoration: none; }
.article-link strong { color: var(--color-accent-deep); white-space: nowrap; }
.final-cta { padding-block: 5rem; }
.final-cta-inner { display: grid; align-content: center; justify-items: start; min-height: 22rem; }
.final-cta small { margin-top: 1.4rem; color: rgba(255,250,241,.72); }
.site-footer { background: var(--color-ink); color: var(--color-light); padding-block: 3rem 1.5rem; }
.footer-grid { display: grid; gap: 2rem; }
.footer-brand img { border-radius: 50%; }
.footer-brand p { max-width: 30rem; margin-top: .85rem; color: var(--color-light); }
.footer-legal { color: var(--color-accent-soft) !important; font-size: .78rem; }
.site-footer h2 { color: var(--color-accent-soft); font: .7rem/1 var(--font-mono); letter-spacing: .1em; }
.footer-links { display: grid; gap: .35rem; margin-top: .75rem; padding: 0; list-style: none; }
.footer-links a { color: var(--color-light); text-decoration: none; }
.footer-links a:hover { color: var(--color-accent-soft); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; margin-top: 2rem; border-top: 1px solid rgba(255,250,241,.24); padding-top: 1rem; color: rgba(255,250,241,.68); font-size: .72rem; }
.page-hero, .article-hero { padding-block: 10rem 4.5rem; background: var(--color-night); color: var(--color-light); }
.page-hero h1, .article-hero h1 { max-width: 11ch; margin-top: .75rem; color: var(--color-light); font-size: clamp(2.8rem, 8vw, 6.6rem); }
.page-hero p, .article-hero p { max-width: 42rem; margin-top: 1rem; color: var(--color-light); }
.platform-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); gap: 1rem; }
.platform-card { position: relative; min-height: 19rem; border-top: 3px solid var(--color-line); padding: 1.5rem; background: var(--color-light); }
.platform-card--featured { border-top-color: var(--color-accent); }
.platform-card h2 { margin: .8rem 0; font-size: 2.5rem; }
.platform-note { margin-top: 1rem; color: var(--color-accent-deep); font: .75rem/1.3 var(--font-mono); }
.platform-card .button { position: absolute; bottom: 1.5rem; left: 1.5rem; }
.steps { display: grid; gap: 0; padding: 0; list-style: none; }
.steps li { display: grid; grid-template-columns: 3.2rem minmax(0,1fr); gap: 1rem; border-top: 1px solid var(--color-line); padding-block: 1.4rem; }
.steps li > span { color: var(--color-accent-deep); font: .78rem/1 var(--font-mono); }
.steps h3 { margin-bottom: .4rem; }
.notice { margin-top: 2rem; border-left: 3px solid var(--color-accent); padding: 1.2rem 1.3rem; background: rgba(255,107,74,.08); }
.notice strong { color: var(--color-accent-deep); }
.data-table, .guide-table { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); margin-top: 1.5rem; border-top: 1px solid var(--color-line); border-left: 1px solid var(--color-line); }
.data-table div, .guide-table div { display: grid; gap: .3rem; min-width: 0; border-right: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); padding: .9rem; }
.data-table span, .guide-table span { color: var(--color-ink-soft); font: .68rem/1.2 var(--font-mono); }
.data-table strong, .guide-table strong { overflow-wrap: anywhere; }
.guide-grid { display: grid; grid-template-columns: repeat(1, minmax(0,1fr)); border-top: 1px solid var(--color-line); border-left: 1px solid var(--color-line); }
.guide-card { display: grid; min-height: 15rem; align-content: start; border-right: 1px solid var(--color-line); border-bottom: 1px solid var(--color-line); padding: 1.4rem; text-decoration: none; transition: transform .2s ease, background .2s ease; }
.guide-card:hover { transform: translateY(-3px); background: var(--color-paper-deep); }
.guide-card > span { color: var(--color-accent-deep); font: .76rem/1 var(--font-mono); }
.guide-card h2 { margin-top: 2.8rem; font-size: 1.6rem; }
.guide-card p { margin-top: .5rem; }
.guide-card strong { align-self: end; margin-top: 1.2rem; color: var(--color-accent-deep); }
.guide-layout { display: grid; gap: 2rem; }
.toc { display: grid; align-content: start; gap: .6rem; border-bottom: 1px solid var(--color-line); padding-bottom: 1.2rem; }
.toc a { color: var(--color-ink-soft); text-decoration: none; }
.toc a:hover { color: var(--color-accent-deep); }
.guide-copy article { scroll-margin-top: 6rem; border-bottom: 1px solid var(--color-line); padding-bottom: 2.5rem; margin-bottom: 2.5rem; }
.guide-copy h2 { margin: .7rem 0 1rem; font-size: clamp(1.9rem, 4.5vw, 3.5rem); }
.guide-copy p { margin-bottom: 1rem; }
.guide-copy ol, .guide-copy ul, .article-body ol { display: grid; gap: .5rem; padding-left: 1.35rem; color: var(--color-ink-soft); }
.check-list { list-style: square; }
.article-body { width: min(54rem, calc(100% - 2rem)); padding-block: 3rem 5rem; }
.article-body p { margin-bottom: 1rem; }
.article-body section { border-bottom: 1px solid var(--color-line); padding-block: 1.8rem; }
.article-body h2 { margin-bottom: .9rem; font-size: 2rem; }
.article-lead { border-left: 3px solid var(--color-accent); padding: 1.15rem 1.3rem; background: var(--color-paper-deep); color: var(--color-ink); font-size: 1.1rem; }
.article-body a { color: var(--color-accent-deep); font-weight: 700; }
.filter-tabs { margin-bottom: 1.5rem; }
.filter-tabs button { border: 1px solid var(--color-line); border-radius: 4px; background: transparent; padding: .55rem .8rem; color: var(--color-ink-soft); cursor: pointer; white-space: nowrap; }
.filter-tabs button[aria-selected="true"] { border-color: var(--color-accent); background: var(--color-accent); color: var(--color-light); }
.lightbox, .modal { position: fixed; z-index: 30; inset: 0; background: rgba(13,22,38,.94); overflow: auto; }
.lightbox[hidden], .modal[hidden] { display: none; }
.lightbox { display: grid; grid-template-columns: 3rem minmax(0,1fr) 3rem; align-items: center; gap: .5rem; padding: 4.5rem 1rem 1rem; }
.lightbox figure { display: grid; justify-items: center; gap: .75rem; min-width: 0; }
.lightbox-image { width: min(100%, 72rem); max-height: 78svh; object-fit: contain; }
.lightbox figcaption { color: var(--color-light); text-align: center; }
.lightbox button, .modal button { border: 1px solid rgba(255,250,241,.55); background: transparent; color: var(--color-light); padding: .65rem .45rem; cursor: pointer; }
.lightbox-close { position: absolute; top: 1rem; right: 1rem; }
.modal { display: grid; place-items: center; padding: 1rem; }
.modal-panel { position: relative; width: min(34rem, 100%); max-height: min(80svh, 42rem); overflow: auto; background: var(--color-paper); padding: 2rem; }
.modal-panel h2 { margin: .7rem 0 1rem; font-size: 2.2rem; }
.modal-panel ol { display: grid; gap: .6rem; padding-left: 1.3rem; }
.modal-close { position: absolute; top: 1rem; right: 1rem; border-color: var(--color-line) !important; color: var(--color-ink) !important; }
@keyframes sheen { 0%, 34% { transform: translateX(-12rem) skewX(-22deg); } 64%, 100% { transform: translateX(34rem) skewX(-22deg); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }
@media (min-width: 40rem) {
  .site-shell { width: min(var(--max-width), calc(100% - 4rem)); }
  .narrow, .article-body { width: min(52rem, calc(100% - 4rem)); }
  .info-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .info-item:nth-child(odd) { border-right: 0; }
  .info-item:not(:nth-child(3n)) { border-right: 1px solid var(--color-line); }
  .story-grid { grid-template-columns: minmax(8rem, .7fr) minmax(0, 1.8fr); gap: 4rem; }
  .feature-grid { grid-template-columns: repeat(2, minmax(0,1fr)); column-gap: 2rem; }
  .gallery-grid--preview { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .gallery-grid--full { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .fit-grid { grid-template-columns: repeat(3, minmax(0,1fr)); gap: 2rem; }
  .fit-grid article:not(:last-child) { border-right: 1px solid var(--color-line); padding-right: 1.5rem; }
  .footer-grid { grid-template-columns: minmax(0,1.8fr) minmax(8rem,.7fr) minmax(0,1fr); gap: 3rem; }
  .platform-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .guide-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .guide-layout { grid-template-columns: 10rem minmax(0,1fr); gap: 3rem; }
  .toc { position: sticky; top: 5.5rem; border-bottom: 0; }
  .article-grid, .article-index { grid-template-columns: repeat(2, minmax(0,1fr)); column-gap: 2rem; }
}
@media (min-width: 60rem) {
  .info-grid { grid-template-columns: repeat(6, minmax(0,1fr)); }
  .info-item:not(:nth-child(3n)) { border-right: 0; }
  .info-item:not(:last-child) { border-right: 1px solid var(--color-line); }
  .gallery-grid--preview { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .gallery-grid--preview .gallery-card:first-child { grid-column: span 2; }
  .gallery-grid--full { grid-template-columns: repeat(3, minmax(0,1fr)); }
}
@media (max-width: 40rem) {
  .site-header { padding-inline: .5rem; }
  .nav-float { justify-content: space-between; }
  .nav-links { position: absolute; top: calc(100% + .5rem); right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: .1rem; border: 1px solid rgba(255,250,241,.28); border-radius: var(--radius); background: var(--color-night); padding: .5rem; }
  .nav-links.is-open { display: flex; }
  .nav-links a { justify-content: flex-start; padding: .8rem .7rem; }
  .nav-cta { display: none; }
  .menu-toggle { display: inline-flex; }
  .hero-content { padding-block: 8rem 6rem; }
  .section-head, .download-band-inner { display: grid; align-items: start; }
  .hero-meta { right: 1rem; left: 1rem; }
  .footer-bottom { display: grid; }
  .lightbox { grid-template-columns: 2.5rem minmax(0,1fr) 2.5rem; padding-inline: .4rem; }
}