:root {
  color-scheme: dark;
  --bg: #12100d;
  --bg-deep: #080706;
  --panel: rgba(25, 22, 18, 0.86);
  --panel-strong: #1d1712;
  --line: rgba(245, 184, 73, 0.22);
  --line-strong: rgba(255, 209, 105, 0.55);
  --text: #f8f1e4;
  --muted: #c9bda9;
  --dim: #968a79;
  --gold: #f7bc4d;
  --gold-soft: #ffd878;
  --ember: #f26724;
  --crimson: #b92325;
  --jade: #5fa57c;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  background:
    radial-gradient(circle at 18% 12%, rgba(185, 35, 37, 0.24), transparent 30%),
    radial-gradient(circle at 88% 36%, rgba(247, 188, 77, 0.14), transparent 24%),
    linear-gradient(180deg, #17110e 0%, var(--bg) 40%, #0b0908 100%);
  color: var(--text);
  font-size: 15px;
  line-height: 1.66;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.18;
  background-image:
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, #000, transparent 78%);
}

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

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

p {
  margin: 0 0 1rem;
}

strong {
  color: var(--gold-soft);
}

.container {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 1000;
  padding: 10px 14px;
  color: #1b1108;
  background: var(--gold-soft);
  border-radius: var(--radius);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(9, 8, 7, 0.56);
  border-bottom: 1px solid rgba(255, 216, 120, 0.12);
  backdrop-filter: blur(16px);
  transition: background 0.25s ease, border-color 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(9, 8, 7, 0.9);
  border-color: rgba(255, 216, 120, 0.28);
}

.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand img {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  box-shadow: 0 0 30px rgba(247, 188, 77, 0.22);
}

.brand strong {
  display: block;
  color: var(--text);
  font-size: 0.94rem;
  line-height: 1.2;
  white-space: nowrap;
}

.brand small {
  display: block;
  color: var(--gold);
  font-size: 0.72rem;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  position: relative;
  padding: 9px 10px;
  color: var(--muted);
  font-size: 0.88rem;
  border-radius: var(--radius);
  overflow: hidden;
  transition: color 0.2s ease, background 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 5px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--ember));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.22s ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--text);
  background: rgba(255, 216, 120, 0.1);
}

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

.site-nav .nav-download {
  color: #201006;
  font-weight: 900;
  background: linear-gradient(135deg, var(--gold-soft), var(--ember));
  box-shadow: 0 8px 24px rgba(242, 103, 36, 0.22);
}

.site-nav .nav-download::after {
  display: none;
}

.site-nav .nav-download:hover,
.site-nav .nav-download:focus-visible {
  color: #160b05;
  background: linear-gradient(135deg, #fff0bd, #ff7a2b);
  box-shadow: 0 12px 30px rgba(242, 103, 36, 0.34);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: currentColor;
  transform-origin: center;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.hero {
  position: relative;
  min-height: 560px;
  display: grid;
  align-items: start;
  overflow: hidden;
  padding: 126px 0 46px;
  isolation: isolate;
}

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

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 64% 46%;
  filter: saturate(1.12) contrast(1.06) brightness(0.92);
  transform: scale(1.01);
}

.hero-overlay {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(8, 7, 6, 0.88) 0%, rgba(8, 7, 6, 0.68) 36%, rgba(8, 7, 6, 0.18) 74%),
    linear-gradient(0deg, var(--bg) 0%, rgba(18, 16, 13, 0.46) 24%, transparent 58%),
    radial-gradient(circle at 30% 68%, rgba(242, 103, 36, 0.2), transparent 34%);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

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

h1 {
  max-width: 760px;
  font-size: clamp(1.82rem, 4.25vw, 3.55rem);
  font-weight: 900;
  color: var(--gold-soft);
  background: linear-gradient(135deg, #fff4c7 0%, var(--gold) 42%, var(--ember) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 10px 32px rgba(0, 0, 0, 0.65), 0 0 36px rgba(242, 103, 36, 0.28);
}

h2 {
  font-size: clamp(1.32rem, 2.35vw, 1.95rem);
  color: var(--gold-soft);
  background: linear-gradient(135deg, #fff0bd 0%, var(--gold) 50%, var(--ember) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

h3 {
  font-size: 1.02rem;
}

.hero-subtitle {
  max-width: 720px;
  margin-top: 16px;
  color: #f4e7d1;
  font-size: clamp(0.92rem, 1.45vw, 1.06rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 22px;
}

.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: var(--radius);
  font-weight: 800;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, transparent 0%, rgba(255, 255, 255, 0.34) 45%, transparent 62%);
  transform: translateX(-120%);
  transition: transform 0.45s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translateY(-2px);
}

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

.btn-primary {
  color: #201006;
  background: linear-gradient(135deg, var(--gold-soft), var(--ember));
  box-shadow: 0 12px 34px rgba(242, 103, 36, 0.34);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 16px 42px rgba(242, 103, 36, 0.46);
}

.btn-secondary {
  color: var(--text);
  border: 1px solid var(--line-strong);
  background: rgba(8, 7, 6, 0.48);
}

.btn-secondary:hover,
.btn-secondary:focus-visible {
  border-color: var(--gold-soft);
  background: rgba(255, 216, 120, 0.12);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  width: min(100%, 840px);
  margin: 32px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  box-shadow: var(--shadow);
}

.hero-stats div {
  padding: 14px;
  background: rgba(13, 11, 9, 0.72);
}

.hero-stats dt {
  color: var(--dim);
  font-size: 0.76rem;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: var(--gold-soft);
  font-weight: 800;
}

.section {
  padding: 72px 0;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.section-copy p,
.section-heading p {
  color: var(--muted);
}

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

.info-panel,
.route-panel,
.download-shell,
.wide-figure {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(35, 29, 22, 0.92), rgba(16, 13, 11, 0.92));
  box-shadow: var(--shadow);
}

.info-panel,
.route-panel,
.download-shell,
.timeline-item,
details {
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease, background 0.22s ease;
}

.info-panel:hover,
.route-panel:hover,
.download-shell:hover,
.timeline-item:hover,
details:hover {
  border-color: var(--line-strong);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.48), 0 0 0 1px rgba(255, 216, 120, 0.08);
}

.info-panel {
  padding: 18px;
}

.info-panel img {
  width: min(240px, 70%);
  margin: 0 auto 20px;
  border-radius: 50%;
}

.info-grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.info-grid span {
  color: var(--dim);
}

.info-grid strong {
  color: var(--text);
}

.feature-band {
  background:
    linear-gradient(180deg, rgba(185, 35, 37, 0.08), rgba(247, 188, 77, 0.04)),
    rgba(0, 0, 0, 0.16);
  border-block: 1px solid rgba(255, 216, 120, 0.08);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  position: relative;
  min-height: 218px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(20, 16, 13, 0.76);
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.feature-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(135deg, rgba(247, 188, 77, 0.14), transparent 52%);
  transition: opacity 0.22s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
  background: rgba(33, 24, 18, 0.86);
}

.feature-card:hover::before {
  opacity: 1;
}

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

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 14px;
  border-radius: 50%;
  color: #1d1007;
  background: linear-gradient(135deg, var(--gold-soft), var(--ember));
  font-weight: 900;
}

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

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.gallery-item {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.gallery-item img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  cursor: zoom-in;
  transition: transform 0.25s ease, filter 0.25s ease;
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: saturate(1.14);
}

.gallery-item:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.38);
}

.gallery-item figcaption,
.wide-figure figcaption {
  padding: 12px 14px 14px;
  color: var(--muted);
  font-size: 0.86rem;
}

.guide-layout {
  align-items: start;
}

.steps {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.steps article {
  display: grid;
  grid-template-columns: 50px 1fr;
  gap: 14px;
  padding: 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(12, 10, 8, 0.62);
  transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.steps article:hover {
  transform: translateX(4px);
  border-color: var(--line-strong);
  background: rgba(30, 22, 16, 0.78);
}

.steps span {
  color: var(--gold-soft);
  font-size: 1.18rem;
  font-weight: 900;
}

.steps p {
  grid-column: 2;
  color: var(--muted);
  margin: -8px 0 0;
}

.route-panel {
  overflow: hidden;
}

.route-panel img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.route-panel h3,
.route-panel ul {
  padding-inline: 22px;
}

.route-panel h3 {
  margin-top: 22px;
}

.route-panel ul {
  margin: 14px 0 22px;
  color: var(--muted);
}

.route-panel li + li {
  margin-top: 10px;
}

.download-section {
  padding: 34px 0;
}

.download-shell {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 28px;
  align-items: center;
  padding: clamp(20px, 3.2vw, 34px);
  background:
    linear-gradient(135deg, rgba(185, 35, 37, 0.22), rgba(247, 188, 77, 0.1)),
    var(--panel-strong);
}

.notice {
  color: #f2d29c;
}

.download-card {
  padding: 18px;
  border: 1px solid rgba(255, 216, 120, 0.28);
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.22);
}

.download-card strong,
.download-card span,
.download-card .btn {
  width: 100%;
}

.download-card strong,
.download-card span {
  display: block;
}

.download-card strong {
  color: var(--text);
  font-size: 1.12rem;
}

.download-card span {
  margin: 4px 0 18px;
  color: var(--muted);
}

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

.timeline-item {
  position: relative;
  padding: 18px 18px 18px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 14, 11, 0.78);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  bottom: 20px;
  width: 4px;
  background: var(--gold);
}

.timeline-item.is-current {
  border-color: var(--line-strong);
  background: linear-gradient(90deg, rgba(242, 103, 36, 0.16), rgba(18, 14, 11, 0.86));
}

.timeline-item time {
  color: var(--gold);
  font-weight: 800;
  font-size: 0.8rem;
}

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

.timeline-item.muted {
  opacity: 0.84;
}

.wide-figure {
  margin: 0;
  overflow: hidden;
}

.wide-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.faq-list {
  display: grid;
  gap: 12px;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 14, 11, 0.82);
}

summary {
  cursor: pointer;
  padding: 15px 18px;
  color: var(--text);
  font-weight: 800;
  transition: color 0.2s ease, background 0.2s ease;
}

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

summary:hover {
  color: var(--gold-soft);
  background: rgba(255, 216, 120, 0.07);
}

:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

details p {
  padding: 0 18px 16px;
  color: var(--muted);
}

.site-footer {
  padding: 24px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: #080706;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-grid strong {
  color: var(--text);
}

.footer-grid nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px 18px;
}

.footer-grid a {
  color: var(--gold);
  font-weight: 700;
  transition: color 0.2s ease;
}

.footer-grid a:hover,
.footer-grid a:focus-visible {
  color: var(--gold-soft);
}

.disclaimer {
  font-size: 0.84rem;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  place-items: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.82);
}

.lightbox.is-open {
  display: grid;
}

.lightbox img {
  max-height: 82svh;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.lightbox button {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  background: rgba(20, 16, 13, 0.92);
  font-size: 1.4rem;
  cursor: pointer;
}

.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) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

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

@media (max-width: 980px) {
  .feature-grid,
  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .two-column,
  .download-shell {
    grid-template-columns: 1fr;
  }

  .download-card {
    max-width: 420px;
  }

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

  .footer-grid nav {
    justify-content: flex-start;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 28px, var(--max));
  }

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

  .brand img {
    width: 44px;
    height: 44px;
  }

  .brand strong {
    max-width: 210px;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    left: 14px;
    right: 14px;
    top: calc(100% + 8px);
    display: none;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(10, 8, 7, 0.96);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
  }

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

  .hero {
    min-height: 520px;
    padding: 102px 0 38px;
  }

  .hero-overlay {
    background:
      linear-gradient(180deg, rgba(8, 7, 6, 0.66), rgba(8, 7, 6, 0.88) 66%, var(--bg) 100%),
      radial-gradient(circle at 50% 62%, rgba(242, 103, 36, 0.18), transparent 40%);
  }

  .hero-media img {
    object-position: 58% 44%;
  }

  h1 {
    font-size: clamp(1.55rem, 8vw, 2.28rem);
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 52px 0;
  }

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

  .feature-card {
    min-height: auto;
  }

  .steps article {
    grid-template-columns: 1fr;
  }

  .steps p {
    grid-column: auto;
    margin: 0;
  }
}

@media (max-width: 420px) {
  .hero-actions,
  .btn {
    width: 100%;
  }

  .brand small {
    display: none;
  }
}