/* Hallmark · v2.0.0 · theme: Atelier · genre: editorial · posture: restrained · shape: vertical gallery narrative · hero: copy-left matted brand portrait-right, next section exposed · signature: the actual app mark set as a catalog print · imagery: brand mark plus truthful information panels, no interface captures · brand: no lock, source pages did not provide a verified design system · copy: researched and independently written · fonts: local system only */
/* Hallmark · pre-emit critique: P4 H4 E4 S4 R5 V5 · weakest: E, the source set lacked eligible interface captures; replaced them with explicitly identified preparation panels and removed every decorative effect not needed for hierarchy */
/* Hallmark · hero-review: in-thread · 3 findings · 3 resolved · finish-review: in-thread · ship · Floor 0 FAIL · Reflex 0 open · finish 0 open */

:root {
  color-scheme: light;
  --color-paper: oklch(96% 0.008 78);
  --color-paper-2: oklch(92% 0.012 76);
  --color-paper-3: oklch(88% 0.014 72);
  --color-card: oklch(98% 0.006 82);
  --color-ink: oklch(20% 0.025 52);
  --color-ink-2: oklch(33% 0.019 54);
  --color-muted: oklch(48% 0.015 60);
  --color-rule: oklch(81% 0.012 70);
  --color-accent: oklch(42% 0.075 248);
  --color-accent-dark: oklch(32% 0.058 248);
  --color-accent-ink: oklch(97% 0.007 78);
  --color-focus: oklch(51% 0.11 248);
  --color-shadow: oklch(20% 0.025 52 / 0.1);
  --font-display: Georgia, "Times New Roman", serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif;
  --space-3xs: 2px;
  --space-2xs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;
  --space-3xl: 96px;
  --space-4xl: 144px;
  --text-sm: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-lead: clamp(1.05rem, 0.5vw + 0.95rem, 1.3rem);
  --text-title: clamp(1.25rem, 0.8vw + 1rem, 1.65rem);
  --text-section: clamp(2rem, 2.8vw + 1rem, 3.35rem);
  --text-display: clamp(2.35rem, 4.2vw + 0.5rem, 4.8rem);
  --container: 1180px;
  --gutter: 32px;
  --radius-control: 4px;
  --radius-card: 6px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-micro: 120ms;
  --dur-short: 220ms;
  --dur-long: 420ms;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; scrollbar-color: var(--color-muted) var(--color-paper); }
body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink-2);
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--color-paper-3); color: var(--color-ink); }
a { color: inherit; text-underline-offset: 0.18em; }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; }
h1, h2, h3 {
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: 0;
  line-height: 1.08;
  text-wrap: balance;
  overflow-wrap: break-word;
  min-width: 0;
}
h1 { font-size: var(--text-display); max-width: 13ch; }
h2 { font-size: var(--text-section); max-width: 15ch; }
h3 { font-size: var(--text-title); line-height: 1.25; }
p { margin: 0; text-wrap: pretty; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section-pad { padding-block: var(--space-3xl); }
.skip-link { position: fixed; left: var(--space-md); top: -80px; z-index: 1000; padding: var(--space-sm) var(--space-md); background: var(--color-ink); color: var(--color-paper); }
.skip-link:focus-visible { top: var(--space-md); }

.site-header { position: sticky; top: 0; z-index: 300; min-height: 72px; background: var(--color-paper); border-bottom: 1px solid var(--color-rule); }
.header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: var(--space-lg); }
.brand { display: inline-flex; align-items: center; gap: var(--space-sm); color: var(--color-ink); font-family: var(--font-display); font-size: 1.2rem; text-decoration: none; }
.brand img { width: 40px; height: 40px; border-radius: var(--radius-control); }
.site-nav { display: flex; align-items: center; gap: var(--space-lg); }
.site-nav a { padding-block: var(--space-xs); color: var(--color-ink-2); font-size: 0.95rem; text-decoration: none; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a.is-current { color: var(--color-ink); border-bottom-color: var(--color-accent); }
.site-nav .nav-download { min-height: 42px; display: inline-flex; align-items: center; padding-inline: var(--space-md); border: 1px solid var(--color-ink); border-radius: var(--radius-control); }
.site-nav .nav-download:hover { background: var(--color-ink); color: var(--color-paper); border-bottom-color: var(--color-ink); }
.menu-toggle { display: none; width: 44px; height: 44px; padding: 0; border: 1px solid var(--color-rule); border-radius: var(--radius-control); background: var(--color-paper); color: var(--color-ink); cursor: pointer; }
.menu-toggle:disabled { opacity: 0.55; cursor: not-allowed; }
.menu-lines, .menu-lines::before, .menu-lines::after { display: block; width: 18px; height: 1px; margin-inline: auto; background: currentColor; content: ""; }
.menu-lines::before { transform: translateY(-6px); }
.menu-lines::after { transform: translateY(5px); }

.hero { border-bottom: 1px solid var(--color-rule); }
.hero-grid { min-height: 640px; display: grid; grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.78fr); align-items: center; gap: var(--space-3xl); padding-block: var(--space-xl); }
.hero-copy { min-width: 0; }
.hero-lead { max-width: 43ch; margin-top: var(--space-lg); font-size: var(--text-lead); }
.hero-actions, .close-actions { display: flex; flex-wrap: wrap; gap: var(--space-sm); margin-top: var(--space-xl); }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; padding-inline: var(--space-lg); border: 1px solid var(--color-ink); border-radius: var(--radius-control); font-weight: 600; text-decoration: none; transition: background-color var(--dur-short) var(--ease-out), color var(--dur-short) var(--ease-out), transform var(--dur-micro) var(--ease-out); }
.button:hover { transform: translateY(-1px); }
.button:active { transform: translateY(1px); }
.button-primary { background: var(--color-ink); color: var(--color-paper); }
.button-primary:hover { background: var(--color-accent-dark); }
.button-secondary { background: transparent; color: var(--color-ink); }
.button-secondary:hover { background: var(--color-paper-2); }
.button:focus-visible, .site-nav a:focus-visible, .brand:focus-visible, summary:focus-visible, .text-link:focus-visible, .menu-toggle:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.hero-facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-lg); max-width: 500px; margin: var(--space-xl) 0 0; padding-top: var(--space-lg); border-top: 1px solid var(--color-rule); }
.hero-facts div { min-width: 0; }
.hero-facts dt { color: var(--color-muted); font-size: var(--text-sm); }
.hero-facts dd { margin: var(--space-2xs) 0 0; color: var(--color-ink); }
.brand-portrait { margin: 0; justify-self: end; width: min(100%, 390px); }
.portrait-mat { aspect-ratio: 4 / 5; display: grid; place-items: center; padding: var(--space-2xl); background: var(--color-card); border: 1px solid var(--color-rule); }
.portrait-mat img { width: min(100%, 230px); border-radius: var(--radius-card); }
.brand-portrait figcaption { margin-top: var(--space-sm); color: var(--color-muted); font-size: var(--text-sm); }

.section-heading { padding-bottom: var(--space-xl); border-bottom: 1px solid var(--color-ink); }
.readiness-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; margin-top: var(--space-xl); background: var(--color-rule); border: 1px solid var(--color-rule); }
.readiness-panel { min-height: 260px; padding: var(--space-xl); background: var(--color-card); }
.readiness-panel-large { grid-row: span 2; min-height: 521px; display: flex; flex-direction: column; justify-content: flex-end; }
.readiness-panel h3 { margin-top: auto; padding-top: var(--space-xl); }
.readiness-panel p { max-width: 45ch; margin-top: var(--space-md); }
.asset-note { max-width: 72ch; margin-top: var(--space-lg); color: var(--color-muted); font-size: var(--text-sm); }

.feature-section { background: var(--color-paper-2); }
.feature-layout { display: grid; grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr); gap: var(--space-3xl); align-items: start; }
.sticky-heading { position: sticky; top: 120px; }
.ruled-list { border-top: 1px solid var(--color-ink); }
.ruled-list article { display: grid; grid-template-columns: 80px minmax(0, 0.7fr) minmax(0, 1fr); gap: var(--space-lg); align-items: start; padding-block: var(--space-lg); border-bottom: 1px solid var(--color-rule); }
.ruled-list article > span { color: var(--color-accent); }
.ruled-list p { max-width: 45ch; }

.notes-band { background: var(--color-ink); color: var(--color-paper-2); }
.notes-band h2 { color: var(--color-paper); }
.notes-layout { display: grid; grid-template-columns: minmax(0, 0.6fr) minmax(0, 1fr); gap: var(--space-3xl); }
.note-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--color-muted); }
.note-list li { padding-block: var(--space-lg); border-bottom: 1px solid var(--color-muted); }
.note-list strong { color: var(--color-paper); }

.link-ledger { margin-top: var(--space-xl); border-top: 1px solid var(--color-rule); }
.link-ledger a { display: grid; grid-template-columns: 140px minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-lg); padding-block: var(--space-lg); border-bottom: 1px solid var(--color-rule); text-decoration: none; }
.link-ledger a:hover strong { color: var(--color-accent-dark); }
.link-ledger span, .link-ledger small { color: var(--color-muted); }
.link-ledger strong { color: var(--color-ink); font-size: var(--text-lg); }

.faq-preview { background: var(--color-card); }
.faq-layout { display: grid; grid-template-columns: minmax(0, 0.45fr) minmax(0, 1fr); gap: var(--space-3xl); align-items: start; }
.faq-list { border-top: 1px solid var(--color-ink); }
details { border-bottom: 1px solid var(--color-rule); }
summary { position: relative; padding: var(--space-lg) var(--space-xl) var(--space-lg) 0; color: var(--color-ink); cursor: pointer; font-weight: 600; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { position: absolute; right: 0; content: "+"; color: var(--color-accent); font-size: 1.35rem; font-weight: 400; }
details[open] summary::after { content: "−"; }
details p { max-width: 68ch; padding: 0 var(--space-xl) var(--space-lg) 0; }
.text-link { display: inline-block; margin-top: var(--space-lg); color: var(--color-accent-dark); font-weight: 600; }

.download-close { padding-block: var(--space-2xl); background: var(--color-paper-3); border-top: 1px solid var(--color-rule); }
.close-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2xl); }
.close-inner h2 { font-size: clamp(1.8rem, 2vw + 1rem, 2.8rem); }
.close-note { max-width: 54ch; margin-top: var(--space-md); }
.close-actions { flex: 0 0 auto; margin-top: 0; }

.site-footer { padding-block: var(--space-2xl); background: var(--color-paper); border-top: 1px solid var(--color-rule); }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: var(--space-md); text-align: center; }
.footer-brand { color: var(--color-ink); font-family: var(--font-display); font-size: 1.5rem; text-decoration: none; }
.site-footer nav { display: flex; flex-wrap: wrap; justify-content: center; gap: var(--space-lg); }
.site-footer nav a { text-decoration: none; }
.site-footer p { max-width: 70ch; color: var(--color-muted); font-size: var(--text-sm); }

.article-hero { border-bottom: 1px solid var(--color-rule); }
.article-hero-grid { min-height: 430px; display: grid; grid-template-columns: minmax(0, 1fr) 260px; align-items: center; gap: var(--space-3xl); padding-block: var(--space-2xl); }
.article-hero h1 { max-width: 15ch; font-size: clamp(2.3rem, 4vw + 0.5rem, 4.2rem); }
.article-hero p { max-width: 48ch; margin-top: var(--space-lg); font-size: var(--text-lead); }
.article-mark { width: 220px; justify-self: end; border-radius: var(--radius-card); }
.article-grid { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: var(--space-3xl); align-items: start; }
.article-nav { position: sticky; top: 112px; display: flex; flex-direction: column; gap: var(--space-sm); padding-top: var(--space-md); border-top: 1px solid var(--color-ink); }
.article-nav strong { color: var(--color-ink); }
.article-nav a { color: var(--color-muted); text-decoration: none; }
.article-nav a:hover { color: var(--color-accent-dark); }
.prose { max-width: 72ch; }
.prose section + section { margin-top: var(--space-2xl); padding-top: var(--space-2xl); border-top: 1px solid var(--color-rule); }
.prose h2 { font-size: clamp(1.8rem, 2vw + 1rem, 2.8rem); }
.prose p { margin-top: var(--space-lg); line-height: 1.8; }
.prose a { color: var(--color-accent-dark); }

.faq-page-grid { display: grid; grid-template-columns: minmax(0, 0.42fr) minmax(0, 1fr); gap: var(--space-3xl); align-items: start; }
.faq-intro { position: sticky; top: 112px; }
.faq-intro p { max-width: 45ch; margin-top: var(--space-lg); }
.faq-catalog { border-top: 1px solid var(--color-ink); }

.js [data-reveal] { opacity: 0; transform: translateY(8px); transition: opacity var(--dur-long) var(--ease-out), transform var(--dur-long) var(--ease-out); transition-delay: calc(var(--i, 0) * 60ms); }
.js [data-reveal].is-in { opacity: 1; transform: none; }

@media (max-width: 900px) {
  :root { --gutter: 24px; }
  .menu-toggle { display: block; }
  .site-nav { position: absolute; left: var(--gutter); right: var(--gutter); top: 64px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: var(--space-md); background: var(--color-card); border: 1px solid var(--color-rule); }
  .site-nav.is-open { display: flex; }
  .site-nav a { min-height: 44px; display: flex; align-items: center; padding-inline: var(--space-sm); }
  .site-nav .nav-download { justify-content: center; margin-top: var(--space-xs); }
  .hero-grid { grid-template-columns: minmax(0, 1fr); min-height: auto; gap: var(--space-xl); padding-block: var(--space-xl); }
  .brand-portrait { justify-self: start; width: min(100%, 320px); }
  .portrait-mat { aspect-ratio: 5 / 4; padding: var(--space-xl); }
  .portrait-mat img { width: 150px; }
  .feature-layout, .notes-layout, .faq-layout, .article-grid, .faq-page-grid { grid-template-columns: minmax(0, 1fr); gap: var(--space-xl); }
  .sticky-heading, .article-nav, .faq-intro { position: static; }
  .ruled-list article { grid-template-columns: 60px minmax(0, 0.8fr) minmax(0, 1fr); }
  .link-ledger a { grid-template-columns: 100px minmax(0, 1fr); }
  .link-ledger small { grid-column: 2; }
  .close-inner { align-items: flex-start; flex-direction: column; }
  .article-hero-grid { grid-template-columns: minmax(0, 1fr) 180px; gap: var(--space-xl); }
  .article-mark { width: 170px; }
}

@media (max-width: 620px) {
  :root { --gutter: 16px; }
  .section-pad { padding-block: var(--space-2xl); }
  .header-inner { min-height: 64px; }
  .brand span { font-size: 1rem; }
  .brand img { width: 36px; height: 36px; }
  .site-nav { left: var(--gutter); right: var(--gutter); }
  h1 { font-size: clamp(2.1rem, 10vw, 3.1rem); max-width: 100%; }
  .hero-grid { gap: var(--space-lg); padding-block: var(--space-lg); }
  .hero-lead { margin-top: var(--space-md); }
  .hero-actions { margin-top: var(--space-lg); }
  .hero-facts { margin-top: var(--space-lg); padding-top: var(--space-md); }
  .brand-portrait { width: 100%; }
  .portrait-mat { aspect-ratio: 8 / 3; padding: var(--space-lg); }
  .portrait-mat img { width: 112px; }
  .readiness-grid { grid-template-columns: minmax(0, 1fr); }
  .readiness-panel, .readiness-panel-large { grid-row: auto; min-height: 220px; }
  .ruled-list article { grid-template-columns: 48px minmax(0, 1fr); }
  .ruled-list article p { grid-column: 2; }
  .link-ledger a { grid-template-columns: minmax(0, 1fr); gap: var(--space-xs); }
  .link-ledger small { grid-column: auto; }
  .article-hero-grid { grid-template-columns: minmax(0, 1fr); min-height: auto; padding-block: var(--space-xl); }
  .article-mark { display: none; }
  .close-actions, .close-actions .button { width: 100%; }
  .site-footer nav { gap: var(--space-md); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; }
  .js [data-reveal] { opacity: 1; transform: none; }
}