:root {
  color-scheme: dark;
  --bg: #08090b;
  --panel: #101216;
  --panel-2: #15181e;
  --line: #292d35;
  --muted: #8c93a3;
  --text: #f3f5f8;
  --accent: #f2c66d;
  --accent-2: #79d0bd;
  --danger: #f07575;
  --radius: 8px;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 10% 0%, rgba(121, 208, 189, 0.16), transparent 28rem),
    linear-gradient(135deg, rgba(242, 198, 109, 0.08), transparent 34rem),
    var(--bg);
  color: var(--text);
  letter-spacing: 0;
}

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

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

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  opacity: 0.2;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

.site-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 24px;
  border-right: 1px solid var(--line);
  background: rgba(8, 9, 11, 0.78);
  backdrop-filter: blur(18px);
}

.brand {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  align-items: center;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border: 1px solid rgba(242, 198, 109, 0.55);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, transparent 45%, rgba(8, 9, 11, 0.9) 45% 55%, transparent 55%),
    repeating-linear-gradient(0deg, var(--accent) 0 8px, #8f6b37 8px 16px);
  box-shadow: 0 0 28px rgba(242, 198, 109, 0.18);
}

.brand strong,
.side-panel strong {
  display: block;
  font-size: 1rem;
}

.brand small,
.nav-label,
.panel-kicker,
.eyebrow,
.feature-index,
.route-card span,
.stats-band span {
  color: var(--muted);
  font-size: 0.74rem;
  text-transform: uppercase;
}

.side-nav {
  display: grid;
  gap: 6px;
  margin-top: 42px;
}

.side-nav a {
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 10px 12px;
  color: #c5cad4;
}

.side-nav a:hover,
.side-nav a.active {
  border-color: var(--line);
  background: var(--panel);
  color: var(--text);
}

.side-panel {
  position: absolute;
  right: 24px;
  bottom: 24px;
  left: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.side-panel p,
.lead,
.feature p,
.story-panel p,
.page-hero p,
.timeline p,
.route-card p,
.stats-band p {
  color: var(--muted);
  line-height: 1.75;
}

.page {
  width: min(1180px, calc(100vw - 280px));
  margin: 0 auto;
  padding: 22px 28px 56px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0 20px;
  background: linear-gradient(to bottom, var(--bg) 72%, transparent);
}

.icon-button {
  display: none;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--text);
}

.icon-button span {
  display: block;
  width: 16px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.command-pill {
  min-width: 260px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: #0d0f13;
  color: #b6bdca;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.82rem;
}

.top-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.top-links a {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px 12px;
  background: rgba(16, 18, 22, 0.7);
  color: #ccd1db;
  font-size: 0.88rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(440px, 1.16fr);
  gap: 28px;
  align-items: stretch;
  min-height: calc(100vh - 116px);
  padding-top: 28px;
}

.hero-copy,
.page-hero {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-2);
  font-weight: 700;
}

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

h1 {
  max-width: 11ch;
  margin-bottom: 22px;
  font-size: clamp(3.2rem, 7vw, 7.8rem);
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 12px;
  font-size: clamp(1.55rem, 2.6vw, 2.35rem);
  line-height: 1.08;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.12rem;
}

.lead {
  max-width: 680px;
  font-size: 1.03rem;
}

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

.primary-action,
.secondary-action {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 16px;
  font-weight: 700;
}

.primary-action {
  background: var(--text);
  color: #0b0d10;
}

.secondary-action {
  background: var(--panel);
  color: var(--text);
}

.demo-frame {
  overflow: hidden;
  align-self: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.45);
}

.frame-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  color: #b7beca;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.8rem;
}

.window-controls {
  display: flex;
  gap: 6px;
}

.window-controls i {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.window-controls i:nth-child(2) {
  background: var(--accent-2);
}

.window-controls i:nth-child(3) {
  background: var(--danger);
}

.pixel-stage {
  position: relative;
  min-height: 600px;
  overflow: hidden;
  isolation: isolate;
}

.pixel-stage img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.88) contrast(1.06);
  transform: scale(1.04);
}

.pixel-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, transparent 20%, rgba(8, 9, 11, 0.62)),
    radial-gradient(circle at 30% 20%, transparent, rgba(8, 9, 11, 0.42));
  z-index: 1;
}

.pixel-grid {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(14, 1fr);
  grid-template-rows: repeat(10, 1fr);
}

.pixel {
  background: rgba(242, 198, 109, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.08);
  mix-blend-mode: screen;
  animation: swapPixel 4.6s ease-in-out infinite;
  animation-delay: calc(var(--i) * -70ms);
}

.stats-band,
.content-grid,
.story-panel,
.timeline,
.route-layout {
  margin-top: 30px;
}

.stats-band {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.stats-band article {
  padding: 20px;
}

.stats-band article + article {
  border-left: 1px solid var(--line);
}

.stats-band strong {
  display: block;
  margin: 10px 0;
  font-size: 1.35rem;
}

.content-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 12px;
}

.section-heading,
.feature,
.story-panel,
.timeline article,
.route-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(16, 18, 22, 0.78);
}

.section-heading,
.feature {
  padding: 20px;
}

.feature-index {
  color: var(--accent);
}

.story-panel {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: 24px;
  padding: 24px;
}

.page-hero {
  min-height: 360px;
  display: grid;
  grid-template-columns: 0.92fr 1fr;
  gap: 26px;
  align-items: end;
  padding: 44px 0 28px;
}

.page-hero h1 {
  max-width: 12ch;
}

.page-hero p {
  margin-bottom: 22px;
  font-size: 1.02rem;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.timeline article {
  min-height: 250px;
  padding: 20px;
}

.timeline time {
  display: block;
  margin-bottom: 22px;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.84rem;
}

.route-layout {
  display: grid;
  grid-template-columns: 0.86fr 1fr 1fr;
  gap: 12px;
}

.route-card {
  overflow: hidden;
}

.route-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.route-card div {
  padding: 18px;
}

.route-card span {
  color: var(--accent-2);
  font-weight: 800;
}


@keyframes swapPixel {
  0%,
  100% {
    opacity: 0.08;
    transform: translate(0, 0) scale(1);
    background: rgba(242, 198, 109, 0.08);
  }
  38% {
    opacity: 0.64;
    transform: translate(var(--x), var(--y)) scale(1.08);
    background: rgba(121, 208, 189, 0.22);
  }
  70% {
    opacity: 0.18;
    transform: translate(calc(var(--x) * -0.35), calc(var(--y) * -0.35)) scale(0.94);
    background: rgba(242, 198, 109, 0.14);
  }
}

@media (max-width: 980px) {
  .site-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    z-index: 10;
    width: min(320px, 88vw);
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  body.menu-open .sidebar {
    transform: translateX(0);
  }

  .page {
    width: 100%;
    padding: 16px;
  }

  .icon-button {
    display: block;
  }

  .hero,
  .page-hero,
  .story-panel,
  .route-layout,
  .content-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .pixel-stage {
    min-height: 470px;
  }

  .stats-band,
  .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .stats-band article + article {
    border-left: 0;
    border-top: 1px solid var(--line);
  }
}

@media (max-width: 640px) {
  .topbar {
    align-items: stretch;
    flex-wrap: wrap;
  }

  .command-pill {
    min-width: 0;
    flex: 1;
  }

  .top-links {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  h1 {
    font-size: 3.35rem;
  }

  .pixel-stage {
    min-height: 390px;
  }

  .stats-band,
  .timeline {
    grid-template-columns: 1fr;
  }
}