/* Hallmark · pre-emit critique: P4 H5 E4 S5 R4 V5
 * Hallmark · genre: atmospheric · macrostructure: Narrative Workflow · theme: Midnight
 * nav: N5 Floating pill · footer: Ft7 Newsletter-first (download CTA as primary) · enrichment: real-game-screenshots
 * axes: paper=dark night · display=classical-serif · accent=lantern-amber
 * audience: 中文剧情向玩家 · use: 了解并下载 · tone: atmospheric nocturnal
 * F4 knobs: numbering=1.0/2.0/3.0 · layout=vertical stack · connector=line
 */
:root {
  --color-paper: oklch(14% 0.03 265);
  --color-paper-2: oklch(18% 0.035 265);
  --color-ink: oklch(94% 0.02 85);
  --color-muted: oklch(72% 0.03 265);
  --color-accent: oklch(78% 0.14 75);
  --color-accent-2: oklch(70% 0.12 45);
  --color-panel: oklch(20% 0.04 265);
  --color-rule: oklch(32% 0.03 265);
  --color-dark: oklch(10% 0.02 265);
  --color-focus: oklch(78% 0.14 75);
  --font-display: "Instrument Serif", "Noto Sans SC", serif;
  --font-body: "Noto Sans SC", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px; --space-8: 64px; --space-9: 96px;
  --radius: 8px;
  --radius-pill: 999px;
  --measure: 65ch;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 180ms;
}

*,*::before,*::after { box-sizing: border-box; }
html, body { overflow-x: clip; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    radial-gradient(1200px 600px at 80% -10%, oklch(28% 0.06 75 / .35), transparent 60%),
    radial-gradient(900px 500px at 10% 20%, oklch(22% 0.05 265 / .5), transparent 55%),
    var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  line-height: 1.75;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--color-accent); }
h1,h2,h3,h4 {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 400;
  line-height: 1.15;
  overflow-wrap: anywhere;
  min-width: 0;
  margin: 0 0 var(--space-3);
}
h1 { font-size: clamp(2.4rem, 6vw, 4.2rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.6rem); }
h3 { font-size: 1.25rem; font-family: var(--font-body); font-weight: 700; }
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 var(--space-3);
}
.lede { font-size: 1.1rem; color: var(--color-muted); max-width: var(--measure); }
.wrap { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  min-height: 44px; padding: .75rem 1.35rem; border: 1px solid var(--color-accent);
  background: var(--color-accent); color: var(--color-dark); font-weight: 700;
  text-decoration: none; cursor: pointer; border-radius: var(--radius);
  transition: transform var(--dur) var(--ease-out), filter var(--dur) var(--ease-out), background var(--dur) var(--ease-out);
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); color: var(--color-dark); }
.btn:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.btn:active { transform: translateY(1px); }
.btn-ghost { background: transparent; color: var(--color-ink); border-color: var(--color-rule); }
.btn-ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn-glow {
  position: relative; overflow: hidden;
  box-shadow: 0 0 0 1px oklch(78% 0.14 75 / .35), 0 0 28px oklch(78% 0.14 75 / .25);
}
.btn-glow::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(110deg, transparent 30%, oklch(100% 0 0 / .35) 50%, transparent 70%);
  transform: translateX(-120%);
  animation: sheen 2.8s var(--ease-out) infinite;
}
@keyframes sheen {
  0%, 55% { transform: translateX(-120%); }
  100% { transform: translateX(120%); }
}
@media (prefers-reduced-motion: reduce) {
  .btn-glow::after { animation: none; }
  html { scroll-behavior: auto; }
  .stage, .feat, .review-card { transition: none !important; }
}

/* N5 Floating pill */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  padding: var(--space-3) var(--space-4) 0;
  pointer-events: none;
}
.nav-pill {
  pointer-events: auto;
  width: min(1080px, 100%);
  margin: 0 auto;
  display: flex; align-items: center; gap: var(--space-3);
  padding: .55rem .7rem .55rem 1rem;
  border: 1px solid oklch(50% 0.04 265 / .35);
  border-radius: var(--radius-pill);
  background: oklch(16% 0.03 265 / .72);
  backdrop-filter: blur(14px);
  box-shadow: 0 10px 40px oklch(0% 0 0 / .35);
}
.brand {
  display: inline-flex; align-items: center; gap: .55rem;
  font-weight: 700; text-decoration: none; white-space: nowrap;
}
.brand img { border-radius: 6px; flex: none; }
.nav-links {
  display: flex; flex: 1; justify-content: center; gap: 1rem;
  font-size: .92rem;
}
.nav-links a { text-decoration: none; color: var(--color-muted); white-space: nowrap; }
.nav-links a:hover { color: var(--color-ink); }
.nav .btn { border-radius: var(--radius-pill); padding-inline: 1.1rem; }

section { padding: var(--space-8) 0; }
.section-head { margin-bottom: var(--space-5); }
.section-head .lede { margin: 0; }

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-items: end;
  padding: calc(88px + var(--space-6)) 0 var(--space-8);
  overflow: clip;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(180deg, oklch(10% 0.02 265 / .35) 0%, oklch(10% 0.02 265 / .55) 40%, oklch(14% 0.03 265 / .92) 100%),
    linear-gradient(90deg, oklch(10% 0.02 265 / .55), transparent 55%);
}
.hero-inner { position: relative; z-index: 1; }
.hero-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: var(--space-4); }
.tag {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em;
  padding: .35rem .65rem; border: 1px solid var(--color-rule);
  background: oklch(14% 0.03 265 / .55); color: var(--color-muted); border-radius: 999px;
}
.hero h1 span {
  display: block; font-family: var(--font-mono); font-size: .95rem;
  letter-spacing: .04em; color: var(--color-accent); margin-top: .5rem;
}
.metrics {
  display: grid; grid-template-columns: repeat(4, minmax(0,1fr));
  gap: var(--space-3); margin: var(--space-5) 0;
}
.metric {
  border-top: 1px solid var(--color-rule); padding-top: var(--space-3);
}
.metric strong { display: block; font-family: var(--font-mono); font-size: .95rem; color: var(--color-accent); }
.metric span { color: var(--color-muted); font-size: .9rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: .75rem; }

/* Info grid */
.info-grid {
  display: grid; grid-template-columns: repeat(5, minmax(0,1fr));
  gap: var(--space-3); margin-top: calc(-1 * var(--space-6)); position: relative; z-index: 2;
}
.info-card {
  background: var(--color-panel); border: 1px solid var(--color-rule);
  padding: var(--space-4); border-radius: var(--radius); min-width: 0;
}
.info-card dt { font-family: var(--font-mono); font-size: 11px; color: var(--color-muted); letter-spacing: .08em; text-transform: uppercase; }
.info-card dd { margin: .4rem 0 0; font-weight: 700; }

/* Narrative stages */
.stages { display: grid; gap: var(--space-6); }
.stage {
  display: grid; grid-template-columns: 140px minmax(0,1fr) minmax(0,280px);
  gap: var(--space-5); align-items: start;
  padding-bottom: var(--space-6);
  border-bottom: 2px solid var(--color-rule);
  opacity: 0; transform: translateX(16px);
  transition: opacity .5s var(--ease-out), transform .5s var(--ease-out);
}
.stage.in { opacity: 1; transform: none; }
.stage-num {
  font-family: var(--font-mono); font-size: 1.4rem; color: var(--color-accent);
  letter-spacing: .04em;
}
.stage p { color: var(--color-muted); margin: 0; max-width: 55ch; }
.stage figure {
  margin: 0; border: 1px solid var(--color-rule); border-radius: var(--radius); overflow: hidden;
}
.stage img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

.story-block { max-width: 70ch; margin: 0 auto; text-align: center; }
.story-block p { color: var(--color-muted); font-size: 1.08rem; }

.grid-feats {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--space-3);
}
.feat {
  padding: var(--space-4); border: 1px solid var(--color-rule);
  background: var(--color-panel); border-radius: var(--radius); min-width: 0;
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out);
}
.feat:hover { transform: translateY(-3px); box-shadow: 0 12px 28px oklch(0% 0 0 / .25); }
.feat p { margin: 0; color: var(--color-muted); }

.gallery {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--space-3);
}
.gallery button {
  border: 1px solid var(--color-rule); padding: 0; background: transparent;
  cursor: pointer; min-width: 0; border-radius: var(--radius); overflow: hidden;
  transition: transform var(--dur) var(--ease-out), filter var(--dur) var(--ease-out);
}
.gallery button:hover { transform: scale(1.015); filter: brightness(1.08); }
.gallery img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }

.cta-band {
  background: linear-gradient(180deg, var(--color-paper-2), oklch(16% 0.04 75 / .25));
  border-block: 1px solid var(--color-rule);
  text-align: center;
}
.cta-band .lede { margin: 0 auto var(--space-4); }

.timeline { display: grid; gap: 0; }
.timeline details {
  border-left: 2px solid var(--color-accent);
  padding: var(--space-4) 0 var(--space-4) var(--space-4);
  margin-left: .5rem;
}
.timeline summary {
  cursor: pointer; font-weight: 700; list-style: none;
  font-family: var(--font-body);
}
.timeline summary::-webkit-details-marker { display: none; }
.timeline p { color: var(--color-muted); margin: var(--space-2) 0 0; }

.reviews {
  display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: var(--space-3);
}
.review-card {
  border: 1px solid var(--color-rule); background: var(--color-panel);
  padding: var(--space-4); border-radius: var(--radius); min-width: 0;
  opacity: 0; transform: translateY(12px);
  transition: opacity .45s var(--ease-out), transform .45s var(--ease-out);
}
.review-card.in { opacity: 1; transform: none; }
.review-card p { margin: 0 0 var(--space-3); color: var(--color-muted); }
.review-card .src { font-family: var(--font-mono); font-size: 12px; color: var(--color-accent); }

.faq details { border-top: 1px solid var(--color-rule); padding: var(--space-4) 0; }
.faq summary {
  cursor: pointer; font-weight: 700; list-style: none;
  display: flex; justify-content: space-between; gap: 1rem; align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mono); color: var(--color-accent); }
.faq details[open] summary::after { content: "-"; }
.faq p { color: var(--color-muted); margin: var(--space-3) 0 0; }

.footer { padding: var(--space-8) 0 var(--space-5); border-top: 1px solid var(--color-rule); }
.footer-cta-first { display: grid; gap: var(--space-7); }
.footer-cta-block {
  text-align: center; padding: var(--space-6);
  border: 1px solid var(--color-rule); border-radius: var(--radius);
  background: oklch(18% 0.04 75 / .12);
}
.footer-cta-block .lede { margin: 0 auto var(--space-4); }
.footer-meta .brand { margin-bottom: var(--space-3); }
.footer-links { display: flex; flex-wrap: wrap; gap: .75rem 1.25rem; margin: var(--space-3) 0; }
.footer a { text-decoration: none; }
.tiny { font-size: .85rem; color: var(--color-muted); }

.lightbox {
  position: fixed; inset: 0; z-index: 80; display: none;
  align-items: center; justify-content: center;
  background: oklch(0% 0 0 / .86); padding: 24px;
}
.lightbox.open { display: flex; }
.lightbox img { max-width: min(1080px, 92vw); max-height: 86vh; border: 1px solid var(--color-rule); }
.lightbox button { position: absolute; top: 50%; translate: 0 -50%; }
.lightbox .prev { left: 18px; }
.lightbox .next { right: 18px; }

.tabs { display: flex; flex-wrap: wrap; gap: .5rem; margin-bottom: var(--space-4); }
.tabs button {
  min-height: 40px; padding: .5rem 1rem; border-radius: var(--radius-pill);
  border: 1px solid var(--color-rule); background: transparent; color: var(--color-muted);
  cursor: pointer; font-family: var(--font-body);
}
.tabs button.active, .tabs button:hover {
  border-color: var(--color-accent); color: var(--color-ink); background: oklch(20% 0.04 75 / .2);
}
.tabs button:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.platform-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--space-3); }
.platform-card {
  border: 1px solid var(--color-rule); background: var(--color-panel);
  padding: var(--space-5); border-radius: var(--radius); min-width: 0;
}
.platform-card .badge {
  display: inline-block; font-family: var(--font-mono); font-size: 11px;
  color: var(--color-dark); background: var(--color-accent); padding: .2rem .5rem; border-radius: 999px; margin-bottom: .75rem;
}
.steps { display: grid; gap: var(--space-4); counter-reset: step; }
.step {
  display: grid; grid-template-columns: 56px minmax(0,1fr); gap: var(--space-3);
  border-left: 2px solid var(--color-rule); padding-left: var(--space-4);
}
.step-num {
  font-family: var(--font-mono); color: var(--color-accent); font-size: 1.2rem;
}
.req-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--space-3); }
table { width: 100%; border-collapse: collapse; }
th, td { border: 1px solid var(--color-rule); padding: 12px; text-align: left; }
th { background: var(--color-paper-2); }

.guide-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: var(--space-3); }
.guide-card {
  border: 1px solid var(--color-rule); background: var(--color-panel);
  padding: var(--space-4); border-radius: var(--radius); text-align: left; cursor: pointer;
  transition: transform var(--dur) var(--ease-out);
  color: inherit; font: inherit; width: 100%;
}
.guide-card:hover { transform: translateY(-2px); border-color: var(--color-accent); }
.modal {
  position: fixed; inset: 0; z-index: 70; display: none;
  align-items: center; justify-content: center; padding: 24px;
  background: oklch(0% 0 0 / .8);
}
.modal.open { display: flex; }
.modal-panel {
  width: min(720px, 100%); max-height: 86vh; overflow: auto;
  background: var(--color-paper-2); border: 1px solid var(--color-rule);
  border-radius: var(--radius); padding: var(--space-5);
}
.article-body { padding: calc(88px + var(--space-6)) 0 var(--space-8); max-width: 70ch; }
.article-body ol, .article-body ul { color: var(--color-muted); padding-left: 1.2rem; }
.toc {
  display: flex; flex-wrap: wrap; gap: .75rem 1rem; margin-bottom: var(--space-5);
  font-size: .92rem;
}
.page-hero {
  padding: calc(88px + var(--space-6)) 0 var(--space-5);
}

@media (max-width: 900px) {
  .nav-links { display: none; }
  .metrics, .info-grid, .grid-feats, .gallery, .reviews, .platform-grid, .req-grid, .guide-grid {
    grid-template-columns: repeat(2, minmax(0,1fr));
  }
  .stage { grid-template-columns: 1fr; }
  .stage figure { max-width: 420px; }
}
@media (max-width: 640px) {
  .metrics, .info-grid, .grid-feats, .gallery, .reviews, .platform-grid, .req-grid, .guide-grid {
    grid-template-columns: 1fr;
  }
  .hero { min-height: auto; padding-top: calc(80px + var(--space-5)); }
  .nav-pill { gap: .4rem; }
  .brand span { max-width: 9ch; overflow: hidden; text-overflow: ellipsis; }
}