:root {
  --bg: #0a0f1d;
  --panel: rgba(22, 34, 63, 0.78);
  --panel-strong: rgba(22, 34, 63, 0.94);
  --line: rgba(0, 242, 254, 0.24);
  --line-strong: rgba(0, 242, 254, 0.58);
  --text: #e2e8f0;
  --muted: #94a3b8;
  --dim: #64748b;
  --white: #ffffff;
  --yellow: #ffd700;
  --cyan: #00f2fe;
  --red: #ff3b30;
  --purple: #af52de;
  --green: #34c759;
  --pink: #ff2d55;
  --shadow: 0 22px 80px rgba(0, 0, 0, 0.34);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    linear-gradient(180deg, rgba(10, 15, 29, 0.78), var(--bg) 460px),
    repeating-linear-gradient(90deg, rgba(0, 242, 254, 0.03) 0 1px, transparent 1px 88px),
    repeating-linear-gradient(0deg, rgba(255, 215, 0, 0.025) 0 1px, transparent 1px 88px),
    var(--bg);
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

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

.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

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

.ui-icon {
  width: 1.05em;
  height: 1.05em;
  flex: 0 0 auto;
  display: inline-block;
  color: currentColor;
  stroke: currentColor;
  transition: transform 180ms ease, filter 180ms ease;
}

button {
  font: inherit;
}

::selection {
  color: #07101f;
  background: var(--yellow);
}

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

.skip-link:focus {
  z-index: 1000;
  left: 18px;
  top: 18px;
  width: auto;
  height: auto;
  padding: 10px 14px;
  margin: 0;
  clip: auto;
  color: #07101f;
  background: var(--yellow);
  border-radius: 6px;
}

.shell {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.section-band {
  position: relative;
  padding: 92px 0;
}

.section-band::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(120deg, transparent 0 44%, rgba(0, 242, 254, 0.07) 45%, transparent 46% 100%),
    repeating-radial-gradient(circle at 0 0, rgba(255, 215, 0, 0.10) 0 1px, transparent 1px 13px);
  background-size: 100% 100%, 112px 112px;
  opacity: 0.24;
  mix-blend-mode: screen;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(10, 15, 29, 0.78);
  border-bottom: 1px solid rgba(0, 242, 254, 0.22);
  backdrop-filter: blur(18px);
}

.nav-shell {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--white);
  font-weight: 900;
  letter-spacing: 0;
}

.brand img {
  width: 46px;
  height: 46px;
  border-radius: 8px;
  border: 1px solid rgba(255, 215, 0, 0.5);
  box-shadow: 0 0 22px rgba(255, 215, 0, 0.2);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  color: var(--text);
  font-size: 14px;
  font-weight: 800;
  padding: 9px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  transition: color 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--cyan);
  border-color: rgba(0, 242, 254, 0.46);
  background: rgba(0, 242, 254, 0.12);
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.18);
  transform: translateY(-1px);
  outline: none;
}

.site-nav a:hover .ui-icon,
.site-nav a:focus-visible .ui-icon {
  transform: scale(1.12) rotate(-6deg);
  filter: drop-shadow(0 0 8px rgba(10, 15, 29, 0.28));
}

.site-nav .nav-download {
  color: #07101f;
  background: var(--yellow);
  border-color: rgba(255, 255, 255, 0.82);
  border-radius: 999px;
  box-shadow: 0 0 22px rgba(255, 215, 0, 0.28);
}

.site-nav .nav-download:hover,
.site-nav .nav-download:focus-visible {
  background: var(--yellow);
  border-color: rgba(255, 255, 255, 0.92);
  box-shadow: 0 0 26px rgba(255, 215, 0, 0.42);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: 6px;
  background: rgba(22, 34, 63, 0.72);
  cursor: pointer;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--cyan);
  transition: transform 180ms ease, opacity 180ms ease, background 180ms ease;
}

.nav-toggle.is-open span:not(.sr-only):nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-open span:not(.sr-only):nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-open span:not(.sr-only):nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-toggle.is-open span:not(.sr-only) {
  background: var(--yellow);
}

.hero {
  min-height: 720px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 15, 29, 0.94) 0%, rgba(10, 15, 29, 0.74) 45%, rgba(10, 15, 29, 0.42) 100%),
    linear-gradient(180deg, rgba(10, 15, 29, 0.05) 0%, var(--bg) 100%),
    url("img/cover.webp") center / cover no-repeat;
  filter: saturate(1.08) contrast(1.04);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 46%);
  gap: 44px;
  align-items: center;
  padding-top: 52px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  color: var(--yellow);
  font-size: clamp(38px, 5vw, 66px);
  line-height: 1;
  letter-spacing: 0;
  text-shadow: 2px 2px 0 #07101f, 0 0 28px rgba(255, 215, 0, 0.34);
}

h2 {
  color: var(--cyan);
  font-size: clamp(23px, 2.7vw, 34px);
  line-height: 1.15;
  letter-spacing: 0;
  margin-bottom: 22px;
  text-shadow: 0 0 18px rgba(0, 242, 254, 0.18);
}

h3 {
  color: var(--white);
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0;
  margin-bottom: 10px;
}

.hero-lede {
  max-width: 720px;
  color: var(--text);
  font-size: clamp(18px, 2.2vw, 23px);
}

.hero-actions,
.gallery-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  position: relative;
  overflow: hidden;
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 13px 20px;
  border-radius: 999px;
  font-weight: 900;
  letter-spacing: 0;
  border: 2px solid transparent;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease, color 180ms ease;
}

.btn::before {
  content: "";
  position: absolute;
  inset: -140% auto -140% -60%;
  width: 46%;
  transform: rotate(18deg);
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.58), transparent);
  opacity: 0;
  transition: left 520ms ease, opacity 180ms ease;
}

.btn:hover::before,
.btn:focus-visible::before {
  left: 112%;
  opacity: 1;
}

.btn .ui-icon,
.btn span {
  position: relative;
  z-index: 1;
}

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

.btn-primary {
  color: #07101f;
  background: var(--yellow);
  border-color: var(--white);
  box-shadow: 4px 4px 0 #07101f, 0 0 32px rgba(255, 215, 0, 0.32);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  box-shadow: 6px 6px 0 #07101f, 0 0 42px rgba(255, 215, 0, 0.48);
}

.btn-secondary {
  color: var(--cyan);
  background: rgba(22, 34, 63, 0.72);
  border-color: rgba(0, 242, 254, 0.68);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 680px;
  margin: 28px 0 0;
}

.hero-stats div,
.quick-grid a,
.info-card,
.guide-step,
.builds article,
.feature-list article,
.timeline li,
.faq-list details,
.mini-metrics div {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-stats div {
  padding: 14px;
}

.hero-stats dt {
  color: var(--dim);
  font-size: 12px;
  font-weight: 800;
}

.hero-stats dd {
  margin: 3px 0 0;
  color: var(--white);
  font-size: 16px;
  font-weight: 900;
}

.hero-media {
  margin: 0;
  border: 1px solid rgba(255, 215, 0, 0.34);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(10, 15, 29, 0.68);
  transform: perspective(1200px) rotateY(-5deg);
  transition: transform 260ms ease, border-color 260ms ease, box-shadow 260ms ease;
  box-shadow: 0 0 0 1px rgba(0, 242, 254, 0.16), 0 28px 90px rgba(0, 0, 0, 0.48);
}

.hero-media:hover {
  border-color: rgba(0, 242, 254, 0.62);
  transform: perspective(1200px) rotateY(-2deg) translateY(-4px);
  box-shadow: 0 0 0 1px rgba(0, 242, 254, 0.36), 0 34px 110px rgba(0, 0, 0, 0.58);
}

.hero-media img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 520ms ease, filter 260ms ease;
}

.hero-media:hover img {
  transform: scale(1.025);
  filter: saturate(1.08) contrast(1.04);
}

figcaption {
  color: var(--muted);
  font-size: 13px;
  padding: 12px 14px;
  border-top: 1px solid rgba(0, 242, 254, 0.18);
  background: rgba(10, 15, 29, 0.78);
}

.quick-index {
  padding: 28px 0;
  border-top: 1px solid rgba(0, 242, 254, 0.18);
  border-bottom: 1px solid rgba(0, 242, 254, 0.18);
  background: rgba(5, 9, 20, 0.56);
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.quick-grid a {
  padding: 18px;
  overflow: hidden;
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.quick-grid a:hover,
.quick-grid a:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  background: rgba(22, 34, 63, 0.94);
  box-shadow: 0 18px 58px rgba(0, 242, 254, 0.16);
  outline: none;
}

.quick-grid strong {
  display: block;
  color: var(--yellow);
  font-size: 17px;
}

.quick-grid span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.two-col,
.media-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 44%);
  gap: 48px;
  align-items: center;
}

.two-col.reverse {
  grid-template-columns: minmax(320px, 44%) minmax(0, 1fr);
}

.section-copy p,
.section-head p,
.media-grid p,
.feature-list p,
.system-grid p,
.guide-step p,
.builds p,
.timeline p,
.faq-list p,
.site-footer p {
  color: var(--muted);
}

.check-list {
  display: grid;
  gap: 12px;
  padding: 0;
  margin: 26px 0 0;
  list-style: none;
}

.check-list li {
  padding-left: 30px;
  position: relative;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--yellow);
  font-weight: 900;
}

.framed-image {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(0, 242, 254, 0.28);
  border-radius: var(--radius);
  background: rgba(22, 34, 63, 0.56);
  box-shadow: var(--shadow);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.framed-image:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 242, 254, 0.62);
  box-shadow: 0 26px 86px rgba(0, 242, 254, 0.12), var(--shadow);
}

.framed-image img,
.story-panel img,
.gallery-track img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 520ms ease, filter 260ms ease;
}

.framed-image:hover img,
.story-panel:hover img,
.gallery-track figure:hover img {
  transform: scale(1.035);
  filter: saturate(1.08) contrast(1.04);
}

.section-head {
  position: relative;
  z-index: 1;
  max-width: 830px;
  margin-bottom: 34px;
}

.system-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.info-card {
  --accent: var(--cyan);
  min-height: 230px;
  padding: 24px;
  overflow: hidden;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease, background 220ms ease;
}

.info-card::before,
.guide-step::before,
.builds article::before,
.feature-list article::before,
.timeline li::before,
.faq-list details::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.08), transparent 34%, rgba(0, 242, 254, 0.07));
  opacity: 0;
  transition: opacity 220ms ease;
}

.info-card:hover,
.guide-step:hover,
.builds article:hover,
.feature-list article:hover,
.timeline li:hover,
.faq-list details:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 242, 254, 0.54);
  background: rgba(22, 34, 63, 0.92);
  box-shadow: 0 24px 76px rgba(0, 242, 254, 0.13), var(--shadow);
}

.info-card:hover::before,
.guide-step:hover::before,
.builds article:hover::before,
.feature-list article:hover::before,
.timeline li:hover::before,
.faq-list details:hover::before {
  opacity: 1;
}

.info-card::after {
  content: "";
  position: absolute;
  inset: auto 18px 18px auto;
  width: 52px;
  height: 45px;
  opacity: 0.24;
  background:
    linear-gradient(30deg, transparent 24%, currentColor 25% 28%, transparent 29% 100%),
    linear-gradient(150deg, transparent 24%, currentColor 25% 28%, transparent 29% 100%);
}

.card-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 28px;
  padding: 0 10px;
  margin-bottom: 18px;
  color: #07101f;
  background: var(--accent);
  border-radius: 4px;
  font-weight: 900;
}

.accent-cyan { --accent: var(--cyan); color: var(--cyan); }
.accent-yellow { --accent: var(--yellow); color: var(--yellow); }
.accent-red { --accent: var(--red); color: var(--red); }
.accent-green { --accent: var(--green); color: var(--green); }
.accent-pink { --accent: var(--pink); color: var(--pink); }
.accent-purple { --accent: var(--purple); color: var(--purple); }

.info-card h3,
.info-card p {
  color: var(--text);
}

.media-story {
  background: rgba(5, 9, 20, 0.42);
}

.story-panel {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid rgba(255, 215, 0, 0.28);
  box-shadow: var(--shadow);
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.story-panel:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 215, 0, 0.58);
  box-shadow: 0 26px 82px rgba(255, 215, 0, 0.12), var(--shadow);
}

.mini-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.mini-metrics div {
  padding: 14px;
}

.mini-metrics strong {
  display: block;
  color: var(--yellow);
}

.mini-metrics span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.guide-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.guide-step {
  padding: 22px;
}

.guide-step span {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.builds {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 18px;
}

.builds article {
  padding: 20px;
  border-color: rgba(255, 215, 0, 0.22);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-list article {
  padding: 20px;
}

.gallery {
  background: rgba(5, 9, 20, 0.48);
}

.gallery-head {
  max-width: none;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: end;
}

.icon-btn {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  background: rgba(22, 34, 63, 0.84);
  border: 1px solid rgba(0, 242, 254, 0.44);
  border-radius: 6px;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, color 180ms ease;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  color: var(--yellow);
  border-color: rgba(255, 215, 0, 0.64);
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 0 24px rgba(255, 215, 0, 0.22);
  outline: none;
}

.gallery-track {
  position: relative;
  z-index: 1;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(310px, 48%);
  gap: 18px;
  overflow-x: auto;
  padding-bottom: 12px;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--cyan) rgba(255, 255, 255, 0.08);
}

.gallery-track figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(0, 242, 254, 0.24);
  border-radius: var(--radius);
  background: var(--panel);
  scroll-snap-align: start;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.gallery-track figure:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 215, 0, 0.48);
  box-shadow: 0 24px 78px rgba(255, 215, 0, 0.11), var(--shadow);
}

.timeline {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  align-items: start;
  padding: 20px 22px;
}

.timeline time {
  display: inline-block;
  margin-bottom: 0;
  color: var(--yellow);
  font-weight: 900;
}

.timeline h3 {
  margin-bottom: 6px;
}

.timeline p {
  margin-bottom: 0;
}

.faq-list {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  max-width: 940px;
}

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

.faq-list summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--white);
  font-weight: 900;
  transition: color 180ms ease, background 180ms ease;
}

.faq-list details:hover summary,
.faq-list details[open] summary {
  color: var(--yellow);
  background: rgba(255, 215, 0, 0.05);
}

.faq-list summary::marker {
  color: var(--yellow);
}

.faq-list p {
  padding: 0 20px 20px;
  margin: 0;
}

.final-cta {
  padding: 66px 0;
  background:
    linear-gradient(90deg, rgba(255, 215, 0, 0.16), rgba(0, 242, 254, 0.12)),
    rgba(5, 9, 20, 0.78);
}

.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.cta-inner h2 {
  margin-bottom: 12px;
}

.cta-inner p {
  max-width: 720px;
  margin: 0;
  color: var(--text);
}

.site-footer {
  padding: 0 0 34px;
  border-top: 1px solid rgba(0, 242, 254, 0.18);
  background: #070b15;
}

.friend-links {
  padding: 46px 0 38px;
  margin-bottom: 30px;
  background:
    radial-gradient(circle at 50% 0%, rgba(0, 242, 254, 0.18), transparent 38%),
    linear-gradient(180deg, rgba(22, 34, 63, 0.96), rgba(10, 15, 29, 0.88));
  border-bottom: 1px solid rgba(0, 242, 254, 0.18);
}

.friend-links h2 {
  margin: 0 0 24px;
  color: var(--yellow);
  font-size: clamp(24px, 2.6vw, 34px);
  text-align: center;
  text-shadow: 0 0 22px rgba(255, 215, 0, 0.28);
}

.friend-link-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
}

.friend-link-list a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  color: var(--text);
  font-size: 15px;
  font-weight: 900;
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 14px 42px rgba(0, 0, 0, 0.2);
  transition: transform 180ms ease, color 180ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.friend-link-list a:hover,
.friend-link-list a:focus-visible {
  color: var(--cyan);
  background: rgba(0, 242, 254, 0.06);
  border-color: rgba(0, 242, 254, 0.88);
  text-shadow: 0 0 12px rgba(0, 242, 254, 0.58);
  box-shadow:
    0 0 0 1px rgba(0, 242, 254, 0.26),
    0 0 24px rgba(0, 242, 254, 0.22),
    0 16px 42px rgba(0, 0, 0, 0.24);
  transform: translateY(-3px);
  outline: none;
}

.site-map-page {
  min-height: 100vh;
}

.site-map-hero {
  padding: 88px 0 46px;
  background:
    linear-gradient(180deg, rgba(10, 15, 29, 0.48), rgba(10, 15, 29, 0.96)),
    url("img/cover.webp") center / cover no-repeat;
}

.site-map-hero .shell {
  max-width: 860px;
  text-align: center;
}

.site-map-hero p:last-child {
  margin: 0 auto;
  max-width: 720px;
  color: var(--text);
}

.site-map-links {
  padding-top: 54px;
}

.site-map-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.site-map-grid article {
  padding: 24px;
  border: 1px solid rgba(0, 242, 254, 0.24);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.site-map-grid h2 {
  margin-bottom: 18px;
  color: var(--yellow);
  font-size: 22px;
}

.site-map-grid a {
  display: block;
  padding: 11px 0;
  color: var(--text);
  border-bottom: 1px solid rgba(0, 242, 254, 0.12);
  transition: color 180ms ease, padding-left 180ms ease, border-color 180ms ease;
}

.site-map-grid a:hover,
.site-map-grid a:focus-visible {
  padding-left: 8px;
  color: var(--cyan);
  border-color: rgba(0, 242, 254, 0.46);
  outline: none;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.site-footer strong {
  color: var(--yellow);
  font-size: 18px;
}

.site-footer p {
  margin: 5px 0 0;
  font-size: 14px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer a {
  color: var(--muted);
  font-size: 14px;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--cyan);
  outline: none;
}

@media (max-width: 1040px) {
  .hero-grid,
  .two-col,
  .two-col.reverse,
  .media-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-media {
    transform: none;
  }

  .quick-grid,
  .system-grid,
  .guide-layout,
  .builds {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .section-band {
    padding: 64px 0;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    inset: 74px 14px auto 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    background: rgba(10, 15, 29, 0.96);
    border: 1px solid rgba(0, 242, 254, 0.24);
    border-radius: 8px;
  }

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

  .site-nav a {
    padding: 12px 16px;
    text-align: center;
  }

  .hero-grid {
    padding-top: 34px;
    gap: 28px;
  }

  h1 {
    font-size: clamp(34px, 10vw, 48px);
  }

  h2 {
    font-size: clamp(22px, 6vw, 30px);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-stats,
  .quick-grid,
  .system-grid,
  .guide-layout,
  .builds,
  .feature-list,
  .mini-metrics,
  .timeline {
    grid-template-columns: 1fr;
  }

  .gallery-head,
  .cta-inner,
  .footer-grid {
    align-items: stretch;
    flex-direction: column;
  }

  .gallery-track {
    grid-auto-columns: 86%;
  }

  .btn {
    width: 100%;
  }
}

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