:root {
  --bg: #11120f;
  --bg-soft: #171a15;
  --panel: #20241c;
  --panel-strong: #2b3025;
  --text: #f3f0e6;
  --muted: #c9c2ad;
  --subtle: #948d7a;
  --line: rgba(243, 240, 230, 0.14);
  --gold: #d9a441;
  --gold-soft: #f0c46c;
  --leaf: #6c9161;
  --red: #b64932;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.34);
  --radius: 8px;
  --container: min(1060px, calc(100% - 40px));
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 0%, rgba(217, 164, 65, 0.14), transparent 28rem),
    linear-gradient(180deg, #11120f 0%, #151811 42%, #10120f 100%);
  color: var(--text);
  font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.66;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: inherit;
  text-decoration: none;
}

a,
button,
summary {
  -webkit-tap-highlight-color: transparent;
}

p {
  margin: 0 0 1rem;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.18;
  letter-spacing: 0;
}

h1 {
  max-width: 11em;
  font-size: clamp(1.85rem, 4.2vw, 3.35rem);
  font-weight: 900;
}

h2 {
  font-size: clamp(1.45rem, 2.7vw, 2.1rem);
  font-weight: 850;
}

h3 {
  font-size: 1rem;
}

button,
summary {
  font: inherit;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.skip-link:focus {
  z-index: 1000;
  top: 12px;
  left: 12px;
  width: auto;
  height: auto;
  padding: 10px 14px;
  clip: auto;
  color: #11120f;
  background: var(--gold-soft);
  border-radius: var(--radius);
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(17, 18, 15, 0.88);
  border-color: var(--line);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(16px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}

.brand-logo {
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
  object-fit: cover;
  border: 1px solid rgba(240, 196, 108, 0.42);
  border-radius: 50%;
  box-shadow: 0 10px 28px rgba(217, 164, 65, 0.24);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 0.84rem;
}

.brand small {
  color: var(--muted);
  font-size: 0.66rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  position: relative;
  padding: 7px 9px;
  color: var(--muted);
  border-radius: var(--radius);
  font-size: 0.8rem;
  transition: color 160ms ease, background 160ms ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 5px;
  left: 10px;
  height: 2px;
  background: var(--gold-soft);
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  outline: none;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  padding: 0;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
  border-radius: 999px;
  transition: transform 180ms ease, opacity 180ms ease;
  transform-origin: center;
}

.nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:not(.sr-only):nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 76svh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 72px 0 34px;
  border-bottom: 1px solid var(--line);
}

.hero-bg,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-bg {
  object-fit: cover;
  object-position: center;
  filter: saturate(0.95) contrast(1.08);
  transform: scale(0.96);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(17, 18, 15, 0.95) 0%, rgba(17, 18, 15, 0.7) 41%, rgba(17, 18, 15, 0.2) 100%),
    linear-gradient(0deg, rgba(17, 18, 15, 0.94) 0%, rgba(17, 18, 15, 0.16) 45%, rgba(17, 18, 15, 0.5) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  align-items: center;
  gap: 28px;
  transform: translateY(-18px);
}

.eyebrow,
.section-kicker,
.panel-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 9px;
  color: var(--gold-soft);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow::before,
.section-kicker::before {
  content: "";
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 999px;
}

.hero-subtitle {
  max-width: 660px;
  margin: 13px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0;
}

.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 800;
  font-size: 0.88rem;
  overflow: hidden;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.button::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 0%, rgba(255, 255, 255, 0.28) 45%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 420ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  outline: none;
}

.button:hover::after,
.button:focus-visible::after {
  transform: translateX(120%);
}

.button.primary {
  color: #161713;
  background: linear-gradient(135deg, var(--gold-soft), var(--gold));
  box-shadow: 0 12px 30px rgba(217, 164, 65, 0.25);
}

.button.primary:hover,
.button.primary:focus-visible {
  box-shadow: 0 16px 34px rgba(217, 164, 65, 0.34);
}

.button.secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--line);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  border-color: rgba(240, 196, 108, 0.52);
  background: rgba(240, 196, 108, 0.1);
}

.button.large {
  min-height: 48px;
  padding: 0 23px;
  font-size: 0.95rem;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 640px;
  margin: 0;
}

.hero-meta div,
.hero-panel,
.feature-card,
.guide-card,
.related-card,
.faq-item {
  background: rgba(32, 36, 28, 0.78);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.hero-meta div:hover,
.hero-panel:hover,
.feature-card:hover,
.guide-card:hover,
.related-card:hover,
.faq-item:hover {
  transform: translateY(-3px);
  border-color: rgba(240, 196, 108, 0.34);
  background: rgba(37, 42, 32, 0.86);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.38);
}

.hero-meta div {
  padding: 10px 12px;
}

.hero-meta dt {
  color: var(--subtle);
  font-size: 0.68rem;
}

.hero-meta dd {
  margin: 2px 0 0;
  font-weight: 850;
  font-size: 0.92rem;
}

.hero-panel {
  padding: 16px;
  backdrop-filter: blur(14px);
}

.hero-panel strong {
  display: block;
  margin-bottom: 8px;
  color: var(--gold-soft);
  font-size: 1.08rem;
  line-height: 1.1;
}

.hero-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.section {
  padding: 72px 0;
}

.section:nth-of-type(even) {
  background: rgba(255, 255, 255, 0.02);
}

.intro-band {
  border-bottom: 1px solid var(--line);
}

.split,
.download-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.86fr);
  align-items: center;
  gap: 38px;
}

.section-copy p,
.section-head p,
.guide-card p,
.related-card p,
.faq-item p,
.download-copy p {
  color: var(--muted);
}

.section-copy h2,
.section-head h2,
.download-copy h2 {
  margin-bottom: 16px;
}

.clean-list {
  display: grid;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.clean-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.clean-list strong {
  color: var(--text);
}

.media-frame,
.download-media,
.gallery-strip figure,
.guide-aside {
  margin: 0;
}

.media-frame img,
.download-media img,
.gallery-strip img,
.guide-aside img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  transition: transform 260ms ease, filter 260ms ease, border-color 260ms ease;
}

.media-frame:hover img,
.download-media:hover img,
.gallery-strip figure:hover img,
.guide-aside:hover img {
  transform: scale(1.018);
  filter: saturate(1.08) contrast(1.04);
  border-color: rgba(240, 196, 108, 0.32);
}

figcaption {
  margin-top: 10px;
  color: var(--subtle);
  font-size: 0.88rem;
}

.section-head {
  max-width: 800px;
  margin-bottom: 26px;
}

.section-head.narrow {
  max-width: 740px;
  margin-inline: auto;
  text-align: center;
}

.section-head.narrow .section-kicker {
  justify-content: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 13px;
}

.feature-card,
.guide-card,
.related-card {
  padding: 18px;
}

.feature-card .icon {
  display: inline-grid;
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  place-items: center;
  color: #171a15;
  background: var(--gold);
  border-radius: 50%;
  font-weight: 900;
  transition: transform 180ms ease, background 180ms ease;
}

.feature-card:hover .icon {
  transform: rotate(-8deg) scale(1.06);
  background: var(--gold-soft);
}

.feature-card h3,
.guide-card h3,
.related-card h3 {
  margin-bottom: 10px;
}

.feature-card p,
.related-card p,
.guide-card p:last-child {
  margin-bottom: 0;
}

.gallery-strip {
  display: grid;
  grid-template-columns: 0.82fr 1.1fr 0.72fr;
  align-items: end;
  gap: 13px;
  margin-top: 22px;
}

.gallery-strip img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.guide-section {
  background:
    linear-gradient(180deg, rgba(108, 145, 97, 0.08), rgba(182, 73, 50, 0.06)),
    var(--bg-soft);
}

.guide-layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.guide-aside {
  position: sticky;
  top: 96px;
}

.aside-note {
  margin-top: 12px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.18);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-note p {
  margin: 6px 0 0;
  color: var(--muted);
}

.guide-content {
  display: grid;
  gap: 13px;
}

.guide-card ol {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.guide-card li + li {
  margin-top: 8px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 135px minmax(0, 1fr);
  gap: 16px;
  padding: 18px;
  background: rgba(32, 36, 28, 0.6);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.timeline-item:hover {
  transform: translateX(4px);
  border-color: rgba(240, 196, 108, 0.34);
  background: rgba(37, 42, 32, 0.72);
}

.timeline-item time {
  color: var(--gold-soft);
  font-weight: 900;
}

.timeline-item p {
  margin: 8px 0 0;
  color: var(--muted);
}

.download-section {
  background:
    linear-gradient(120deg, rgba(217, 164, 65, 0.1), rgba(108, 145, 97, 0.1)),
    #151811;
  border-block: 1px solid var(--line);
}

.platforms {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 20px;
}

.platforms span {
  padding: 6px 9px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.platforms span:hover {
  transform: translateY(-2px);
  border-color: rgba(240, 196, 108, 0.46);
  background: rgba(240, 196, 108, 0.12);
}

.download-note {
  margin-top: 12px;
  font-size: 0.92rem;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  padding: 0;
  overflow: hidden;
}

.faq-item summary {
  cursor: pointer;
  padding: 15px 18px;
  font-weight: 850;
  transition: color 160ms ease, background 160ms ease;
}

.faq-item summary:hover,
.faq-item summary:focus-visible {
  color: var(--gold-soft);
  background: rgba(255, 255, 255, 0.04);
  outline: none;
}

.faq-item[open] {
  border-color: rgba(240, 196, 108, 0.3);
}

.faq-item summary::marker {
  color: var(--gold);
}

.faq-item p {
  margin: 0;
  padding: 0 18px 16px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.site-footer {
  min-height: 1px;
  padding: 0;
  color: var(--muted);
  background: #0c0d0b;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 34px;
}

.site-footer strong {
  display: block;
  color: var(--text);
  margin-bottom: 8px;
}

.site-footer p {
  margin: 0;
  font-size: 0.86rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 520ms ease, transform 520ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-meta div:hover,
  .hero-panel:hover,
  .feature-card:hover,
  .guide-card:hover,
  .related-card:hover,
  .faq-item:hover,
  .timeline-item:hover,
  .platforms span:hover,
  .media-frame:hover img,
  .download-media:hover img,
  .gallery-strip figure:hover img,
  .guide-aside:hover img {
    transform: none;
  }
}

@media (max-width: 980px) {
  :root {
    --container: min(100% - 32px, 760px);
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: 76px 16px auto;
    display: grid;
    gap: 6px;
    padding: 14px;
    background: rgba(17, 18, 15, 0.96);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    backdrop-filter: blur(16px);
  }

  .site-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav a {
    padding: 12px;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 52px;
    align-items: end;
  }

  .hero-inner,
  .split,
  .download-wrap,
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .hero-panel,
  .guide-aside {
    position: static;
  }

  .hero-inner {
    transform: none;
  }

  .feature-grid,
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .gallery-strip {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --container: min(100% - 24px, 520px);
  }

  .nav-wrap {
    min-height: 68px;
  }

  .brand strong {
    max-width: 14em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .site-nav {
    inset: 68px 12px auto;
  }

  .hero {
    padding-top: 104px;
  }

  .hero-bg {
    object-position: 62% center;
    transform: none;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(17, 18, 15, 0.68) 0%, rgba(17, 18, 15, 0.8) 44%, rgba(17, 18, 15, 0.98) 100%);
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-actions,
  .platforms {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-meta,
  .feature-grid,
  .gallery-strip,
  .related-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 64px 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .feature-card,
  .guide-card,
  .related-card,
  .timeline-item {
    padding: 18px;
  }
}