:root {
  --bg: #10140f;
  --bg-soft: #171d15;
  --panel: #202719;
  --panel-strong: #26301f;
  --text: #f5f1e7;
  --muted: #c8c0ae;
  --subtle: #928a77;
  --line: rgba(245, 241, 231, 0.14);
  --gold: #d6a94a;
  --gold-light: #f0cf7a;
  --leaf: #6f8f4d;
  --red: #b84a32;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
  --radius: 8px;
  --container: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(214, 169, 74, 0.12), transparent 34rem),
    linear-gradient(180deg, #0d100d 0%, var(--bg) 44%, #12160f 100%);
  line-height: 1.72;
  letter-spacing: 0;
  font-size: 15px;
}

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

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

a,
button,
summary,
.feature-card,
.image-card,
.timeline-item,
.download-card,
.hero-panel,
.gallery-item {
  transition:
    background-color 0.22s ease,
    border-color 0.22s ease,
    color 0.22s ease,
    box-shadow 0.22s ease,
    opacity 0.22s ease,
    transform 0.22s ease;
}

p {
  margin: 0 0 1rem;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  background: var(--gold);
  color: #17120a;
  border-radius: 6px;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 1rem;
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  border-bottom: 1px solid rgba(245, 241, 231, 0.1);
  background: rgba(13, 16, 13, 0.78);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(var(--container), calc(100% - 32px));
  min-height: 60px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
  font-weight: 800;
  color: var(--text);
}

.brand img {
  width: 32px;
  height: 32px;
}

.brand span {
  white-space: nowrap;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-menu a {
  padding: 0.45rem 0.72rem;
  border-radius: 6px;
  color: var(--muted);
  font-size: 0.95rem;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  background: rgba(245, 241, 231, 0.12);
  color: var(--text);
  transform: translateY(-1px);
  outline: none;
}

.nav-menu .nav-download {
  margin-left: 0.3rem;
  background: var(--gold);
  color: #1d160a;
  font-weight: 900;
}

.nav-menu .nav-download:hover,
.nav-menu .nav-download:focus-visible {
  background: var(--gold-light);
  color: #1d160a;
  box-shadow: 0 10px 24px rgba(214, 169, 74, 0.24);
}

.nav-toggle {
  display: none;
  min-width: 58px;
  height: 36px;
  padding: 0 0.75rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(245, 241, 231, 0.06);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 800;
}

.nav-toggle-text {
  display: inline-block;
  line-height: 1;
}

.hero {
  position: relative;
  min-height: 0;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 5.2rem 0 1.4rem;
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 28%;
  filter: saturate(0.9) contrast(1.06);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(10, 12, 10, 0.93) 0%, rgba(10, 12, 10, 0.72) 45%, rgba(10, 12, 10, 0.45) 100%),
    linear-gradient(0deg, var(--bg) 0%, rgba(16, 20, 15, 0.1) 20%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 2.2rem;
  align-items: center;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.8rem;
  color: var(--gold-light);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  color: var(--gold-light);
  font-size: clamp(1.7rem, 4.2vw, 3.6rem);
}

h2 {
  color: var(--gold-light);
  font-size: clamp(1.28rem, 2.35vw, 1.95rem);
}

h3 {
  font-size: 1.08rem;
}

.hero-subtitle {
  max-width: 720px;
  margin: 0.95rem 0 1.3rem;
  color: var(--muted);
  font-size: clamp(0.95rem, 1.3vw, 1.05rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0.6rem 0.95rem;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

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

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 16px 42px rgba(214, 169, 74, 0.32);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: rgba(240, 207, 122, 0.5);
  background: rgba(245, 241, 231, 0.13);
}

.btn-primary {
  background: linear-gradient(135deg, var(--gold) 0%, #f4d47c 100%);
  color: #1d160a;
  box-shadow: 0 12px 36px rgba(214, 169, 74, 0.25);
}

.btn-secondary {
  border-color: rgba(245, 241, 231, 0.24);
  background: rgba(245, 241, 231, 0.08);
  color: var(--text);
}

.btn-wide {
  width: 100%;
}

.hero-panel,
.download-card,
.feature-card,
.image-card,
.gallery-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(32, 39, 25, 0.78);
  box-shadow: var(--shadow);
}

.hero-panel {
  padding: 1rem;
  backdrop-filter: blur(16px);
}

.hero-panel:hover {
  border-color: rgba(240, 207, 122, 0.34);
  box-shadow: 0 28px 76px rgba(0, 0, 0, 0.44);
  transform: translateY(-3px);
}

.seal {
  width: 78px;
  height: 78px;
  border-radius: 8px;
  margin-bottom: 1rem;
}

.hero-panel dl {
  margin: 0;
}

.hero-panel div {
  padding: 0.7rem 0;
  border-top: 1px solid var(--line);
}

.hero-panel dt {
  color: var(--subtle);
  font-size: 0.84rem;
}

.hero-panel dd {
  margin: 0.25rem 0 0;
  color: var(--text);
  font-weight: 700;
}

.section {
  padding: 4.2rem 0;
}

.section-tight {
  padding-top: 2rem;
}

.band {
  background:
    linear-gradient(180deg, rgba(111, 143, 77, 0.08), rgba(184, 74, 50, 0.04)),
    rgba(245, 241, 231, 0.025);
  border-block: 1px solid rgba(245, 241, 231, 0.08);
}

.container {
  width: min(var(--container), calc(100% - 32px));
  margin: 0 auto;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: 2rem;
  align-items: center;
}

.copy-block p:not(.section-kicker),
.section-heading p,
.download-copy p {
  color: var(--muted);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 1.5rem;
}

.section-heading h2,
.copy-block h2,
.download-copy h2 {
  position: relative;
  padding-bottom: 0.75rem;
}

.section-heading h2::after,
.copy-block h2::after,
.download-copy h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 72px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold-light), rgba(111, 143, 77, 0.15));
}

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

.feature-card {
  position: relative;
  overflow: hidden;
  padding: 1rem;
  background: rgba(32, 39, 25, 0.68);
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--leaf));
  opacity: 0.82;
}

.feature-card:hover {
  border-color: rgba(240, 207, 122, 0.34);
  background: rgba(38, 48, 31, 0.86);
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
  transform: translateY(-4px);
}

.feature-number {
  display: block;
  margin-bottom: 1rem;
  color: var(--gold-light);
  font-size: 0.8rem;
  font-weight: 900;
}

.feature-card p {
  margin-top: 0.7rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.image-card,
.gallery-item {
  overflow: hidden;
}

.image-card {
  position: relative;
}

.image-card::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 38%;
  pointer-events: none;
  background: linear-gradient(0deg, rgba(13, 16, 13, 0.66), transparent);
}

.image-card img,
.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.42s ease, filter 0.42s ease;
}

.image-card:hover,
.gallery-item:hover {
  border-color: rgba(240, 207, 122, 0.34);
  box-shadow: 0 20px 54px rgba(0, 0, 0, 0.32);
  transform: translateY(-3px);
}

.image-card:hover img,
.gallery-item:hover img {
  filter: saturate(1.08) contrast(1.04);
  transform: scale(1.035);
}

figcaption {
  padding: 0.65rem 0.85rem 0.8rem;
  color: var(--muted);
  font-size: 0.9rem;
}

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

.gallery-item.large {
  grid-column: span 2;
  grid-row: span 2;
}

.gallery-item.large img {
  height: 100%;
  min-height: 360px;
}

.guide-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(320px, 1.25fr);
  gap: 2rem;
  align-items: start;
}

.text-link {
  display: inline-flex;
  margin-top: 0.4rem;
  color: var(--gold-light);
  font-weight: 800;
  border-bottom: 1px solid currentColor;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--gold);
  transform: translateX(3px);
  outline: none;
}

.guide-list {
  position: relative;
  margin: 0;
  padding: 1rem 1rem 1rem 2.6rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(16, 20, 15, 0.54);
}

.guide-list::before {
  content: "";
  position: absolute;
  left: 1.35rem;
  top: 1.25rem;
  bottom: 1.25rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-light), rgba(240, 207, 122, 0.08));
}

.guide-list li {
  padding: 0.42rem 0;
  color: var(--muted);
}

.guide-list li::marker {
  color: var(--gold-light);
  font-weight: 900;
}

.timeline {
  position: relative;
  display: grid;
  gap: 0.7rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 78px;
  top: 0.8rem;
  bottom: 0.8rem;
  width: 1px;
  background: rgba(240, 207, 122, 0.16);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 160px 150px minmax(0, 1fr);
  gap: 0.8rem;
  align-items: start;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(32, 39, 25, 0.46);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 72px;
  top: 1.15rem;
  width: 12px;
  height: 12px;
  border: 2px solid var(--gold-light);
  border-radius: 999px;
  background: var(--bg);
  box-shadow: 0 0 0 5px rgba(240, 207, 122, 0.08);
}

.timeline-item:hover {
  border-color: rgba(240, 207, 122, 0.32);
  background: rgba(32, 39, 25, 0.72);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.24);
  transform: translateX(4px);
}

.timeline-item.featured {
  border-color: rgba(214, 169, 74, 0.4);
  background: rgba(214, 169, 74, 0.08);
}

.timeline-item.muted {
  opacity: 0.88;
}

.timeline-item time {
  color: var(--gold-light);
  font-size: 0.9rem;
  font-weight: 800;
}

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

.download-band {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(214, 169, 74, 0.16), rgba(111, 143, 77, 0.12)),
    #151a12;
  border-block: 1px solid rgba(214, 169, 74, 0.2);
}

.download-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0, rgba(245, 241, 231, 0.04) 1px, transparent 1px),
    linear-gradient(0deg, transparent 0, rgba(245, 241, 231, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
}

.download-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 1.5rem;
  align-items: center;
}

.notice {
  max-width: 720px;
  padding: 0.68rem 0.85rem;
  border: 1px solid rgba(214, 169, 74, 0.32);
  border-radius: 6px;
  background: rgba(214, 169, 74, 0.08);
}

.download-card {
  position: relative;
  padding: 1rem;
  background: rgba(13, 16, 13, 0.52);
}

.download-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(240, 207, 122, 0.12), transparent 42%);
}

.download-card > * {
  position: relative;
}

.download-card:hover {
  border-color: rgba(240, 207, 122, 0.36);
  box-shadow: 0 22px 58px rgba(0, 0, 0, 0.34);
  transform: translateY(-3px);
}

.download-card ul {
  margin: 1rem 0 1.25rem;
  padding-left: 1.2rem;
  color: var(--muted);
}

.faq-wrap {
  max-width: 920px;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(32, 39, 25, 0.52);
  overflow: hidden;
}

summary {
  position: relative;
  cursor: pointer;
  padding: 0.85rem 1rem;
  font-weight: 800;
}

summary::after {
  content: "+";
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--gold-light);
  font-weight: 900;
}

details[open] summary::after {
  content: "-";
}

details:hover {
  border-color: rgba(240, 207, 122, 0.3);
  background: rgba(38, 48, 31, 0.62);
}

summary:hover,
summary:focus-visible {
  color: var(--gold-light);
  outline: none;
}

summary::marker {
  color: var(--gold-light);
}

details p {
  margin: 0;
  padding: 0 1rem 0.95rem;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #0b0e0b;
  padding: 1.5rem 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-inner p {
  margin: 0.35rem 0 0;
  color: var(--subtle);
  font-size: 0.92rem;
}

.footer-inner nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .nav-menu a,
  a,
  button,
  summary,
  .feature-card,
  .image-card,
  .timeline-item,
  .download-card,
  .hero-panel,
  .gallery-item,
  .image-card img,
  .gallery-item img,
  .reveal {
    transition: none;
  }

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

@media (max-width: 980px) {
  .hero-inner,
  .two-column,
  .guide-layout,
  .download-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-panel {
    max-width: 520px;
  }

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

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

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.45rem;
    padding-left: 1rem;
  }

  .timeline::before,
  .timeline-item::before {
    display: none;
  }
}

@media (max-width: 720px) {
  .nav {
    min-height: 56px;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-menu {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 62px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.55rem;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(13, 16, 13, 0.96);
    box-shadow: var(--shadow);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu a {
    padding: 0.8rem;
  }

  .nav-menu .nav-download {
    margin-left: 0;
    text-align: center;
  }

  .hero {
    padding-top: 5.2rem;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(10, 12, 10, 0.76) 0%, rgba(10, 12, 10, 0.9) 62%, var(--bg) 100%);
  }

  .hero-actions,
  .btn {
    width: 100%;
  }

  .section {
    padding: 3.2rem 0;
  }

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

  .gallery-item.large {
    grid-column: auto;
    grid-row: auto;
  }

  .gallery-item.large img {
    min-height: 0;
  }

  .guide-list {
    padding-left: 2.4rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}