:root {
  color-scheme: dark;
  --bg: #151016;
  --bg-2: #20171a;
  --panel: rgba(39, 28, 32, 0.78);
  --panel-solid: #241a1e;
  --text: #fff8f1;
  --muted: #ccb9ad;
  --soft: #9d8d86;
  --line: rgba(255, 232, 214, 0.16);
  --rose: #f05f79;
  --gold: #f2bc69;
  --teal: #61d2c8;
  --ink: #100b0d;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --radius: 8px;
  --container: min(1120px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 16% 0%, rgba(240, 95, 121, 0.18), transparent 30%),
    linear-gradient(180deg, #151016 0%, #1b1215 44%, #120d0f 100%);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

p {
  margin: 0 0 1em;
}

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

h1 {
  max-width: 820px;
  font-size: clamp(2.2rem, 5.6vw, 4.45rem);
  font-weight: 900;
  letter-spacing: 0;
  color: var(--gold);
  text-shadow: 0 4px 22px rgba(240, 95, 121, 0.38);
}

h2 {
  font-size: clamp(1.55rem, 3.1vw, 2.35rem);
  font-weight: 850;
  color: var(--gold);
}

h3 {
  font-size: 1.12rem;
  color: var(--teal);
}

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

.skip-link {
  position: fixed;
  left: 14px;
  top: 12px;
  z-index: 100;
  transform: translateY(-160%);
  padding: 10px 14px;
  background: var(--gold);
  color: #21130e;
  border-radius: 6px;
  font-weight: 700;
}

.skip-link:focus {
  transform: translateY(0);
}

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

.site-header {
  position: fixed;
  z-index: 40;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(20px, calc((100vw - 1120px) / 2));
  color: var(--text);
  transition: background-color 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}

.site-header.is-scrolled {
  background: rgba(18, 13, 15, 0.88);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 800;
}

.brand img {
  width: 38px;
  height: 54px;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.brand span {
  max-width: 300px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  position: relative;
  padding: 9px 12px;
  border-radius: 6px;
  color: rgba(255, 248, 241, 0.78);
  font-size: 0.94rem;
  overflow: hidden;
  transition: color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 6px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), var(--rose));
  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, 255, 255, 0.08);
  transform: translateY(-1px);
}

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

.site-nav .nav-download {
  color: #19090b;
  background: linear-gradient(135deg, var(--gold), #ff8a65);
  font-weight: 900;
  box-shadow: 0 10px 24px rgba(240, 95, 121, 0.22);
}

.site-nav .nav-download:hover,
.site-nav .nav-download:focus-visible {
  color: #19090b;
  background: linear-gradient(135deg, #ffd27f, var(--rose));
}

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
  border-radius: 2px;
  transform-origin: center;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

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

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

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

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  isolation: isolate;
  overflow: hidden;
  padding: 132px max(20px, calc((100vw - 1120px) / 2)) 46px;
}

.hero-media,
.hero-media img {
  position: absolute;
  inset: 0;
  z-index: -3;
  width: 100%;
  height: 100%;
}

.hero-media img {
  object-fit: cover;
  object-position: center top;
  filter: saturate(1.05) contrast(1.02);
  transform: scale(1.02);
  animation: heroDrift 16s ease-in-out infinite alternate;
}

.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(10, 8, 9, 0.9) 0%, rgba(12, 8, 10, 0.68) 42%, rgba(16, 10, 12, 0.28) 76%),
    linear-gradient(180deg, rgba(9, 6, 8, 0.32) 0%, rgba(16, 10, 12, 0.32) 55%, #151016 100%);
}

.hero-content {
  width: min(900px, 100%);
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--teal);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-lede {
  max-width: 760px;
  margin: 20px 0 0;
  color: rgba(255, 248, 241, 0.86);
  font-size: clamp(1.02rem, 2.2vw, 1.28rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  line-height: 1.2;
  position: relative;
  overflow: hidden;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.34) 48%, transparent 68%);
  transform: translateX(-120%);
  transition: transform 0.55s ease;
}

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

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

.btn-primary {
  background: linear-gradient(135deg, var(--rose), #ff8a65);
  color: #19090b;
  box-shadow: 0 14px 34px rgba(240, 95, 121, 0.28);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 0 18px 44px rgba(240, 95, 121, 0.38);
}

.btn-secondary {
  border-color: rgba(255, 248, 241, 0.3);
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  backdrop-filter: blur(10px);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr));
  gap: 1px;
  width: min(840px, 100%);
  margin: 40px 0 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
}

.hero-facts div {
  min-width: 0;
  padding: 14px;
  background: rgba(19, 13, 15, 0.52);
}

.hero-facts dt {
  color: var(--soft);
  font-size: 0.78rem;
}

.hero-facts dd {
  margin: 3px 0 0;
  font-weight: 800;
}

.section {
  padding: 92px 0;
}

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 1.05fr);
  align-items: center;
  gap: 44px;
}

.split-layout.reverse {
  grid-template-columns: minmax(360px, 1.05fr) minmax(0, 0.95fr);
}

.section-copy > p:not(.section-kicker),
.section-heading > p:not(.section-kicker) {
  color: var(--muted);
  font-size: 1.03rem;
}

.section-copy h2,
.section-heading h2 {
  margin-bottom: 18px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.compact {
  margin-bottom: 22px;
}

.feature-figure,
.feature-item,
.guide-panel,
.timeline-item,
.faq details,
.cta-inner {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease, background-color 0.28s ease;
}

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

.feature-figure:hover,
.feature-item:hover,
.guide-panel:hover,
.timeline-item:hover,
.faq details:hover {
  transform: translateY(-5px);
  border-color: rgba(242, 188, 105, 0.42);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.46), 0 0 0 1px rgba(240, 95, 121, 0.12);
}

.feature-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  transition: transform 0.42s ease, filter 0.42s ease;
}

.feature-figure:hover img {
  transform: scale(1.035);
  filter: saturate(1.1) contrast(1.05);
}

.feature-figure figcaption,
.gallery-grid figcaption {
  color: var(--muted);
  padding: 12px 14px;
  font-size: 0.92rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-item {
  overflow: hidden;
}

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

.feature-item:hover img {
  transform: scale(1.045);
  filter: saturate(1.12) contrast(1.04);
}

.feature-item h3,
.feature-item p {
  padding-inline: 18px;
}

.feature-item h3 {
  margin-top: 18px;
}

.feature-item p {
  color: var(--muted);
  margin-top: 8px;
  padding-bottom: 8px;
}

.systems {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-top: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}

.systems div {
  min-width: 0;
  padding: 22px 18px;
  background: rgba(35, 25, 29, 0.88);
  transition: background-color 0.24s ease, transform 0.24s ease;
}

.systems div:hover {
  background: rgba(53, 36, 42, 0.94);
  transform: translateY(-2px);
}

.stat {
  display: block;
  color: var(--gold);
  font-size: clamp(1.65rem, 4vw, 2.3rem);
  font-weight: 900;
  line-height: 1;
}

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

.gallery-strip {
  padding: 72px 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.035), rgba(255, 255, 255, 0));
  border-block: 1px solid var(--line);
}

.gallery-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 0.62fr;
  gap: 18px;
}

.gallery-grid figure {
  min-width: 0;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}

.gallery-grid figure:hover {
  transform: translateY(-5px);
  border-color: rgba(97, 210, 200, 0.42);
  box-shadow: 0 24px 72px rgba(0, 0, 0, 0.42);
}

.gallery-grid img {
  width: 100%;
  height: 100%;
  max-height: 320px;
  object-fit: cover;
  transition: transform 0.42s ease, filter 0.42s ease;
}

.gallery-grid figure:hover img {
  transform: scale(1.045);
  filter: saturate(1.1) contrast(1.04);
}

.guide-section {
  background:
    linear-gradient(135deg, rgba(97, 210, 200, 0.08), transparent 42%),
    linear-gradient(180deg, transparent, rgba(240, 95, 121, 0.06));
}

.guide-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.9fr 0.9fr;
  gap: 18px;
  align-items: start;
}

.guide-panel {
  padding: 22px;
}

.guide-panel.accent {
  background: linear-gradient(180deg, rgba(240, 95, 121, 0.18), rgba(36, 26, 30, 0.86));
}

.guide-panel h3 {
  margin-bottom: 12px;
}

.guide-panel ol,
.guide-panel ul {
  margin: 0;
  padding-left: 1.2em;
  color: var(--muted);
}

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

.guide-panel p {
  color: var(--muted);
}

.requirements {
  background: rgba(255, 255, 255, 0.025);
}

.specs {
  display: grid;
  gap: 14px;
  margin: 22px 0;
}

.specs div {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.045);
  transition: transform 0.24s ease, border-color 0.24s ease, background-color 0.24s ease;
}

.specs div:hover {
  transform: translateX(4px);
  border-color: rgba(97, 210, 200, 0.42);
  background: rgba(97, 210, 200, 0.07);
}

.specs h3 {
  margin-bottom: 8px;
}

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

.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--gold);
  font-weight: 800;
  border-bottom: 1px solid rgba(242, 188, 105, 0.45);
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--teal);
  border-color: rgba(97, 210, 200, 0.7);
  transform: translateX(4px);
}

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

.timeline-item {
  position: relative;
  padding: 20px 22px 20px 140px;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--teal), var(--rose));
  opacity: 0;
  transition: opacity 0.24s ease;
}

.timeline-item:hover::before {
  opacity: 1;
}

.timeline-item time {
  position: absolute;
  left: 22px;
  top: 22px;
  color: var(--teal);
  font-weight: 800;
  font-size: 0.92rem;
}

.timeline-item h3 {
  margin-bottom: 6px;
  color: var(--gold);
}

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

.faq {
  background: rgba(255, 255, 255, 0.025);
}

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

.faq details {
  padding: 0;
  overflow: hidden;
}

.faq summary {
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 800;
  list-style: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.faq summary:hover {
  color: var(--gold);
  background: rgba(255, 255, 255, 0.035);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  float: right;
  color: var(--gold);
  font-size: 1.2rem;
  line-height: 1;
}

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

.faq details p {
  margin: 0;
  padding: 0 20px 18px;
  color: var(--muted);
}

.cta-section {
  padding: 72px 0;
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 30px;
  background:
    linear-gradient(135deg, rgba(240, 95, 121, 0.22), rgba(97, 210, 200, 0.08)),
    var(--panel-solid);
}

.cta-inner h2 {
  max-width: 720px;
  margin-bottom: 10px;
}

.cta-inner p:not(.section-kicker) {
  margin: 0;
  color: var(--muted);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #0f0a0c;
  color: var(--soft);
}

.footer-inner {
  padding: 28px 0;
  font-size: 0.92rem;
}

.footer-inner p {
  margin: 0;
}

.footer-inner p + p {
  margin-top: 6px;
}

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

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

@keyframes heroDrift {
  from {
    transform: scale(1.02) translate3d(0, 0, 0);
  }
  to {
    transform: scale(1.06) translate3d(-1.2%, -0.6%, 0);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

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

@media (max-width: 920px) {
  :root {
    --container: min(100% - 28px, 760px);
  }

  .site-header {
    padding: 10px 14px;
  }

  .brand span {
    max-width: min(52vw, 280px);
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 14px;
    right: 14px;
    display: grid;
    gap: 2px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(18, 13, 15, 0.96);
    box-shadow: var(--shadow);
    transform-origin: top;
    transform: scaleY(0.96);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  }

  .site-nav.is-open {
    transform: scaleY(1);
    opacity: 1;
    visibility: visible;
  }

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

  .hero {
    min-height: 86vh;
    padding-top: 118px;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(9, 6, 8, 0.55) 0%, rgba(16, 10, 12, 0.66) 46%, #151016 100%),
      linear-gradient(90deg, rgba(10, 8, 9, 0.82), rgba(10, 8, 9, 0.32));
  }

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

  .split-layout,
  .split-layout.reverse,
  .feature-grid,
  .gallery-grid,
  .guide-layout {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 70px 0;
  }

  .timeline-item {
    padding-left: 22px;
  }

  .timeline-item time {
    position: static;
    display: block;
    margin-bottom: 8px;
  }

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

@media (max-width: 560px) {
  :root {
    --container: calc(100% - 24px);
  }

  h1 {
    font-size: clamp(2rem, 10.5vw, 3rem);
  }

  h2 {
    font-size: clamp(1.42rem, 7vw, 1.95rem);
  }

  .brand img {
    width: 32px;
    height: 46px;
  }

  .brand span {
    max-width: 52vw;
    font-size: 0.95rem;
  }

  .hero {
    min-height: 92vh;
    padding-bottom: 30px;
  }

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

  .hero-facts,
  .systems {
    grid-template-columns: 1fr;
  }

  .feature-item h3,
  .feature-item p {
    padding-inline: 15px;
  }

  .guide-panel,
  .cta-inner {
    padding: 18px;
  }
}