/* Primitive → semantic → component tokens */
:root {
  --p-ink-950: oklch(0.145 0.008 285);
  --p-ink-900: oklch(0.19 0.008 285);
  --p-ink-850: oklch(0.235 0.009 285);
  --p-ink-800: oklch(0.29 0.009 285);
  --p-paper-50: oklch(0.96 0.014 90);
  --p-paper-100: oklch(0.925 0.012 90);
  --p-offwhite: oklch(0.99 0.003 90);
  --p-signal: oklch(0.79 0.14 65);
  --p-signal-dark: oklch(0.47 0.105 58);
  --p-text: oklch(0.23 0.012 70);
  --p-muted: oklch(0.42 0.015 70);
  --p-muted-dark: oklch(0.79 0.01 285);
  --p-faint-dark: oklch(0.64 0.01 285);

  --surface-dark: var(--p-ink-950);
  --surface-panel: var(--p-ink-900);
  --surface-raised: var(--p-ink-850);
  --surface-paper: var(--p-paper-50);
  --surface-light: var(--p-offwhite);
  --border-dark: var(--p-ink-800);
  --border-light: color-mix(in oklch, var(--p-text) 18%, transparent);
  --text: var(--p-text);
  --text-muted: var(--p-muted);
  --text-on-dark: var(--p-offwhite);
  --text-muted-on-dark: var(--p-muted-dark);
  --accent: var(--p-signal);
  --accent-on-light: var(--p-signal-dark);
  --focus: var(--p-signal);

  --button-primary-bg: var(--accent);
  --button-primary-text: var(--surface-dark);
  --header-height: 80px;
  --radius-sm: 4px;
  --radius-md: 10px;
  --font-sans: "Noto Sans CJK SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Space Mono", "Noto Sans Mono CJK SC", "SFMono-Regular", Consolas, monospace;
  --ease-standard: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  background: var(--surface-dark);
}
body {
  min-height: 100dvh;
  overflow-x: clip;
  color: var(--text);
  background: var(--surface-dark);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; }
img { max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; }
button { color: inherit; cursor: pointer; }
address { font-style: normal; }
h1, h2, h3 { line-height: 1.13; text-wrap: balance; }
p { max-width: 72ch; }
ul { padding-left: 1.25rem; }
::selection { color: var(--surface-dark); background: var(--accent); }
:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}
.container {
  width: calc(100% - 48px);
  max-width: 1280px;
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 16px;
  color: var(--surface-dark);
  background: var(--accent);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform 180ms ease-out;
}
.skip-link:focus { transform: translateY(0); }
.scroll-progress {
  position: fixed;
  z-index: 70;
  inset: 0 0 auto;
  height: 2px;
  pointer-events: none;
}
.scroll-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left center;
}

/* Header */
.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  height: var(--header-height);
  color: var(--text-on-dark);
  border-bottom: 1px solid transparent;
  transition: background-color 200ms ease-out, border-color 200ms ease-out;
}
.site-header.is-scrolled,
.site-header.is-menu-open {
  background: color-mix(in oklch, var(--surface-dark) 92%, transparent);
  border-color: var(--border-dark);
  backdrop-filter: blur(16px) saturate(130%);
}
.header-inner {
  display: flex;
  align-items: center;
  height: 100%;
  gap: 28px;
}
.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 44px;
  gap: 14px;
}
.brand img { width: 108px; height: auto; }
.brand-separator { width: 1px; height: 24px; background: var(--border-dark); }
.brand-site { font-size: 14px; letter-spacing: 0.04em; white-space: nowrap; }
.brand-site strong { color: var(--accent); font-family: var(--font-mono); font-size: 17px; }
.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  margin-left: auto;
}
.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--text-muted-on-dark);
  font-size: 14px;
  transition: color 180ms ease-out;
}
.site-nav a::after {
  content: "";
  position: absolute;
  inset: auto 0 5px;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease-out;
}
.site-nav a:hover,
.site-nav a[aria-current="location"] { color: var(--text-on-dark); }
.site-nav a:hover::after,
.site-nav a[aria-current="location"]::after { transform: scaleX(1); }
.header-phone {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: 8px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 14px;
  white-space: nowrap;
  transition: opacity 180ms ease-out;
}
.header-phone:hover { opacity: 0.76; }
.header-phone svg,
.button svg,
.mobile-call svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.menu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  gap: 7px;
  padding: 0;
  border: 0;
  background: transparent;
}
.menu-toggle svg {
  width: 23px;
  height: 23px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
}
.menu-toggle span { font-size: 13px; }

/* Shared controls */
.button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  gap: 10px;
  padding: 13px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  transition: transform 180ms ease-out, background-color 180ms ease-out, color 180ms ease-out;
}
.button:hover { transform: translateY(-2px); }
.button:active { transform: translateY(0); }
.button-primary {
  isolation: isolate;
  color: var(--button-primary-text);
  background: var(--button-primary-bg);
}
.button-primary::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -7px;
  border: 1px solid var(--accent);
  border-radius: calc(var(--radius-sm) + 5px);
  opacity: 0;
  animation: cta-pulse 3.4s ease-in-out infinite;
}
.button-primary:hover { background: color-mix(in oklch, var(--accent) 86%, var(--p-offwhite)); }
.button-primary:focus-visible { outline-color: var(--p-offwhite); }
.button-dark { color: var(--text-on-dark); background: var(--surface-dark); }
.button-dark:hover { background: var(--surface-raised); }
.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  gap: 9px;
  padding: 8px 2px;
  color: var(--text-on-dark);
  font-size: 15px;
}
.text-link svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: var(--accent);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform 180ms ease-out;
}
.text-link:hover svg { transform: translateX(5px); }
.text-button,
.copy-phone {
  min-height: 44px;
  padding: 8px 0;
  border: 0;
  border-bottom: 1px solid currentColor;
  background: transparent;
  font-size: 14px;
  transition: color 180ms ease-out, opacity 180ms ease-out;
}
.text-button:hover,
.copy-phone:hover { color: var(--accent-on-light); }
.copy-feedback { min-height: 24px; margin-top: 8px; font-size: 13px; }

/* Hero */
.hero {
  position: relative;
  isolation: isolate;
  display: flex;
  min-height: 100dvh;
  overflow: hidden;
  padding: 136px 0 48px;
  color: var(--text-on-dark);
  background: var(--surface-dark);
}
.hero-grid,
.contact-grid-bg {
  position: absolute;
  z-index: -2;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in oklch, var(--p-offwhite) 5%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in oklch, var(--p-offwhite) 5%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: linear-gradient(to bottom, black, transparent 88%);
  animation: grid-pan 38s linear infinite;
}
.hero-glow {
  position: absolute;
  z-index: -1;
  top: -20%;
  right: -10%;
  width: 60%;
  aspect-ratio: 1;
  pointer-events: none;
  background: radial-gradient(circle, color-mix(in oklch, var(--accent) 12%, transparent), transparent 68%);
}
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  align-items: center;
  gap: 64px;
  margin-block: auto;
}
.hero-copy { position: relative; z-index: 2; }
.signal-label,
.section-kicker,
.mini-label {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.13em;
  line-height: 1.5;
  text-transform: uppercase;
}
.signal-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: signal-pulse 1.8s ease-out infinite;
}
.hero h1 {
  max-width: 10ch;
  margin-top: 24px;
  font-size: clamp(3rem, 5.7vw, 5.35rem);
  font-weight: 800;
  letter-spacing: -0.055em;
}
.hero h1 span { color: var(--accent); font-family: var(--font-mono); letter-spacing: -0.08em; }
.hero-keywords {
  margin-top: 24px;
  color: var(--text-on-dark);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
}
.hero-lead { margin-top: 16px; color: var(--text-muted-on-dark); font-size: 17px; line-height: 1.8; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 18px 26px; margin-top: 30px; }
.hero-address {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: 24px;
  color: var(--p-faint-dark);
  font-size: 13px;
}
.hero-address svg {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}
.facility-monitor {
  position: relative;
  width: 100%;
  max-width: 620px;
  justify-self: end;
  overflow: hidden;
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  background: color-mix(in oklch, var(--surface-panel) 82%, transparent);
  box-shadow: 0 28px 80px color-mix(in oklch, var(--surface-dark) 72%, transparent), 0 0 40px color-mix(in oklch, var(--accent) 9%, transparent);
  backdrop-filter: blur(14px);
  animation: monitor-float 7s ease-in-out infinite;
}
.monitor-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 46px;
  padding: 0 16px;
  color: var(--p-faint-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}
.monitor-status { display: inline-flex; align-items: center; gap: 7px; color: var(--text-muted-on-dark); }
.monitor-status i { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.monitor-image { position: relative; aspect-ratio: 16 / 10; overflow: hidden; background: var(--surface-raised); }
.monitor-image > img { width: 100%; height: 100%; object-fit: cover; }
.monitor-image::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(to top, color-mix(in oklch, var(--surface-dark) 42%, transparent), transparent 44%);
}
.metric-dial {
  position: absolute;
  z-index: 2;
  right: 18px;
  bottom: 18px;
  width: 116px;
  height: 116px;
  border-radius: 50%;
  background: color-mix(in oklch, var(--surface-dark) 82%, transparent);
  backdrop-filter: blur(8px);
}
.metric-dial svg { width: 100%; height: 100%; transform: rotate(-90deg); }
.metric-dial circle { fill: none; stroke-width: 3; }
.dial-track { stroke: var(--border-dark); }
.dial-value {
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 326.73;
  stroke-dashoffset: 0.03;
}
.metric-dial > div {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.metric-dial strong { font-family: var(--font-mono); font-size: 19px; line-height: 1; }
.metric-dial strong small { font-size: 10px; }
.metric-dial span { margin-top: 7px; color: var(--text-muted-on-dark); font-size: 10px; }
.monitor-readout { display: grid; grid-template-columns: repeat(3, 1fr); }
.monitor-readout > div { padding: 16px; }
.monitor-readout > div + div { border-left: 1px solid var(--border-dark); }
.monitor-readout span,
.monitor-readout small { display: block; color: var(--p-faint-dark); font-size: 10px; }
.monitor-readout span { font-family: var(--font-mono); letter-spacing: 0.08em; }
.monitor-readout strong { display: block; margin: 3px 0; font-family: var(--font-mono); font-size: 23px; line-height: 1.25; }
.hero-specs {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 8px;
  border-top: 1px solid var(--border-dark);
  border-bottom: 1px solid var(--border-dark);
}
.hero-specs > div { padding: 20px 24px; }
.hero-specs > div:first-child { padding-left: 0; }
.hero-specs > div + div { border-left: 1px solid var(--border-dark); }
.hero-specs dt { color: var(--p-faint-dark); font-size: 12px; }
.hero-specs dd {
  margin-top: 4px;
  color: var(--text-on-dark);
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 2.4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1.25;
}
.hero-specs dd small { margin-left: 8px; color: var(--text-muted-on-dark); font-family: var(--font-sans); font-size: 12px; font-weight: 400; letter-spacing: 0; }
.hero-specs > div:last-child dd small { display: block; margin: 5px 0 0; }

/* Sections */
.section { padding: 112px 0; }
.section-paper { color: var(--text); background: var(--surface-paper); }
.section-dark { color: var(--text-on-dark); background: var(--surface-dark); }
.section-services { color: var(--text); background: var(--surface-light); }
.section-faq { color: var(--text); background: var(--surface-paper); }
.section-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  align-items: start;
  gap: 64px;
}
.section-kicker { color: var(--accent-on-light); }
.section-dark .section-kicker,
.contact-section .section-kicker { color: var(--accent); }
.section h2,
.contact-section h2 {
  margin-top: 18px;
  font-size: clamp(2.25rem, 4.5vw, 4rem);
  font-weight: 750;
  letter-spacing: -0.045em;
}
.section-summary { padding-top: 46px; color: var(--text-muted); }
.section-summary p + p { margin-top: 16px; }
.section-dark .section-summary { color: var(--text-muted-on-dark); }

/* Overview */
.campus-figure { margin-top: 64px; }
.campus-figure img {
  width: 100%;
  aspect-ratio: 3.56 / 1;
  object-fit: cover;
  background: var(--p-paper-100);
}
.campus-figure figcaption,
.location-media figcaption {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 12px;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.05em;
}
.building-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 88px;
  margin-top: 72px;
}
.mini-label { color: var(--accent-on-light); }
.building-copy h3 { max-width: none; margin-top: 18px; font-size: clamp(1.7rem, 3vw, 2.35rem); letter-spacing: -0.035em; }
.building-copy > p:last-child { margin-top: 24px; color: var(--text-muted); }
.fact-ledger { border-top: 1px solid var(--border-light); }
.fact-ledger > div {
  display: grid;
  grid-template-columns: minmax(0, 0.65fr) minmax(0, 1.35fr);
  gap: 24px;
  padding: 17px 0;
  border-bottom: 1px solid var(--border-light);
}
.fact-ledger dt { color: var(--text-muted); font-size: 14px; }
.fact-ledger dd { font-size: 15px; font-weight: 600; }

/* Infrastructure accordion */
.infra-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  align-items: start;
  gap: 64px;
  margin-top: 72px;
}
.infra-list { border-bottom: 1px solid var(--border-dark); }
.infra-item { border-top: 1px solid var(--border-dark); }
.infra-item summary {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) 32px;
  align-items: center;
  min-height: 94px;
  gap: 16px;
  padding: 14px 0;
  list-style: none;
  cursor: pointer;
}
.infra-item summary::-webkit-details-marker { display: none; }
.infra-index { color: var(--p-faint-dark); font-family: var(--font-mono); font-size: 12px; }
.infra-title { font-size: 20px; font-weight: 650; transition: color 180ms ease-out; }
.infra-title small { display: block; margin-top: 5px; color: var(--p-faint-dark); font-family: var(--font-mono); font-size: 10px; font-weight: 400; letter-spacing: 0.1em; }
.infra-item summary:hover .infra-title,
.infra-item[open] .infra-title { color: var(--accent); }
.infra-plus { position: relative; width: 30px; height: 30px; }
.infra-plus::before,
.infra-plus::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 16px;
  height: 1px;
  background: var(--text-muted-on-dark);
  transform: translate(-50%, -50%);
  transition: transform 200ms ease-out;
}
.infra-plus::after { transform: translate(-50%, -50%) rotate(90deg); }
.infra-item[open] .infra-plus::after { transform: translate(-50%, -50%) rotate(0); }
.infra-content { padding: 0 32px 30px 58px; color: var(--text-muted-on-dark); }
.infra-content ul { display: grid; gap: 9px; }
.infra-content li { padding-left: 4px; }
.infra-content li::marker { color: var(--accent); }
.infra-note { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border-dark); font-size: 14px; }
.infra-visual { position: sticky; top: calc(var(--header-height) + 28px); }
.infra-image-wrap { aspect-ratio: 4 / 3; overflow: hidden; background: var(--surface-panel); }
.infra-image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: opacity 180ms ease-out, transform 240ms ease-out; }
.infra-image-wrap img.is-changing { opacity: 0.2; transform: scale(0.98); }
.infra-visual figcaption { margin-top: 14px; color: var(--text-muted-on-dark); font-size: 13px; }
.infra-visual-meta {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--border-dark);
  color: var(--p-faint-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
}

/* Gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-template-rows: 320px 320px 340px;
  gap: 16px;
  margin-top: 64px;
}
.gallery-item {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 0;
  border: 0;
  border-radius: var(--radius-sm);
  background: var(--surface-raised);
  text-align: left;
}
.gallery-item-1 { grid-column: 1 / 9; grid-row: 1; }
.gallery-item-2 { grid-column: 9 / 13; grid-row: 1; }
.gallery-item-3 { grid-column: 1 / 5; grid-row: 2; }
.gallery-item-4 { grid-column: 5 / 9; grid-row: 2; }
.gallery-item-5 { grid-column: 9 / 13; grid-row: 2; }
.gallery-item-6 { grid-column: 1 / 13; grid-row: 3; }
.gallery-item img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 240ms var(--ease-standard), opacity 180ms ease-out;
}
.gallery-item::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 35% 0 0;
  pointer-events: none;
  background: linear-gradient(to bottom, transparent, color-mix(in oklch, var(--surface-dark) 90%, transparent));
}
.gallery-item:hover img { transform: scale(1.035); }
.gallery-item:active img { transform: scale(1.01); }
.gallery-caption { position: absolute; z-index: 2; right: 20px; bottom: 18px; left: 20px; color: var(--text-on-dark); }
.gallery-caption strong { display: block; font-size: 17px; font-weight: 650; }
.gallery-caption small { display: block; margin-top: 3px; color: var(--text-muted-on-dark); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.09em; }
.gallery-expand {
  position: absolute;
  z-index: 2;
  top: 12px;
  right: 12px;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  color: var(--text-on-dark);
  border: 1px solid color-mix(in oklch, var(--p-offwhite) 30%, transparent);
  border-radius: 50%;
  background: color-mix(in oklch, var(--surface-dark) 56%, transparent);
  font-family: var(--font-mono);
  font-size: 24px;
  transition: background-color 180ms ease-out, transform 180ms ease-out;
}
.gallery-item:hover .gallery-expand { background: color-mix(in oklch, var(--surface-dark) 82%, transparent); transform: rotate(90deg); }

/* Services */
.service-list { margin-top: 64px; border-top: 1px solid var(--border-light); }
.service-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 0.85fr) minmax(0, 1.3fr) minmax(120px, auto);
  align-items: center;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border-light);
}
.service-index { color: var(--text-muted); font-family: var(--font-mono); font-size: 12px; }
.service-row h3 { font-size: 22px; letter-spacing: -0.025em; }
.service-row p { color: var(--text-muted); font-size: 15px; }
.service-row > strong { justify-self: end; color: var(--accent-on-light); font-family: var(--font-mono); font-size: 19px; white-space: nowrap; }

/* Location */
.location-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: 80px;
}
.location-media img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; background: var(--p-paper-100); }
.location-content h2 { font-size: clamp(2.6rem, 4.5vw, 4.3rem); }
.location-content > address { margin-top: 26px; font-size: 18px; font-weight: 600; }
.distance-list { margin-top: 30px; border-top: 1px solid var(--border-light); }
.distance-list > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-light);
}
.distance-list dt { color: var(--text-muted); font-size: 14px; }
.distance-list dd { font-family: var(--font-mono); font-size: 22px; font-weight: 700; white-space: nowrap; }
.distance-list dd small { margin-left: 5px; font-size: 12px; font-weight: 400; }
.distance-list .distance-text { font-family: var(--font-sans); font-size: 14px; font-weight: 600; white-space: normal; text-align: right; }
.location-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; margin-top: 28px; }
.location-content .copy-feedback { color: var(--text-muted); }

/* FAQ */
.faq-grid { display: grid; grid-template-columns: minmax(0, 0.75fr) minmax(0, 1.25fr); gap: 88px; }
.faq-list { border-top: 1px solid var(--border-light); }
.faq-list details { border-bottom: 1px solid var(--border-light); }
.faq-list summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  gap: 24px;
  padding: 18px 0;
  list-style: none;
  font-size: 18px;
  font-weight: 650;
  cursor: pointer;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { flex: 0 0 auto; font-family: var(--font-mono); font-size: 25px; font-weight: 400; transition: transform 180ms ease-out; }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details[open] summary { color: var(--accent-on-light); }
.faq-list details p { padding: 0 40px 26px 0; color: var(--text-muted); }
.faq-list details p a { color: var(--accent-on-light); font-family: var(--font-mono); font-weight: 700; text-decoration: underline; text-underline-offset: 4px; }

/* Contact and footer */
.contact-section {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 96px 0;
  color: var(--text-on-dark);
  background: var(--surface-panel);
}
.contact-grid-bg { z-index: -1; opacity: 0.65; mask-image: linear-gradient(90deg, black, transparent); }
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); align-items: center; gap: 72px; }
.contact-section h2 { font-size: clamp(2.2rem, 4vw, 3.6rem); }
.contact-section .contact-grid > div:first-child > p:last-child { margin-top: 24px; color: var(--text-muted-on-dark); }
.contact-phone-panel { padding-top: 22px; border-top: 1px solid var(--border-dark); }
.contact-phone-panel > span { color: var(--text-muted-on-dark); font-size: 13px; }
.contact-phone-panel > a {
  display: block;
  margin-top: 10px;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 3.4rem);
  font-weight: 700;
  letter-spacing: -0.065em;
  line-height: 1.25;
  transition: opacity 180ms ease-out;
}
.contact-phone-panel > a:hover { opacity: 0.75; }
.copy-phone { margin-top: 18px; color: var(--text-on-dark); }
.copy-phone:hover { color: var(--accent); }
.contact-phone-panel .copy-feedback { color: var(--text-muted-on-dark); }
.site-footer { color: var(--text-muted-on-dark); background: var(--surface-dark); }
.footer-main {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.2fr) minmax(0, 0.7fr);
  gap: 48px;
  padding-top: 48px;
  padding-bottom: 48px;
  border-top: 1px solid var(--border-dark);
}
.footer-brand img { width: 120px; height: auto; }
.footer-brand p { margin-top: 14px; color: var(--text-on-dark); font-size: 14px; }
.footer-contact > span { color: var(--p-faint-dark); font-size: 12px; }
.footer-contact p,
.footer-contact a { display: inline-flex; margin-top: 8px; color: var(--text-on-dark); font-size: 14px; }
.footer-contact a { min-height: 44px; align-items: center; font-family: var(--font-mono); font-size: 20px; }
.footer-contact a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 28px;
  padding-top: 22px;
  padding-bottom: 24px;
  border-top: 1px solid var(--border-dark);
  font-size: 12px;
}
.footer-note { color: var(--p-faint-dark); }
.footer-bottom > a { display: inline-flex; align-items: center; min-height: 44px; transition: color 180ms ease-out; }
.footer-bottom > a:hover { color: var(--accent); }
.mobile-call { display: none; }

/* Lightbox */
.lightbox {
  width: calc(100% - 48px);
  max-width: 1200px;
  max-height: 92dvh;
  padding: 62px 72px 24px;
  color: var(--text-on-dark);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
  background: var(--surface-dark);
  overflow: auto;
}
.lightbox[open] { animation: dialog-enter 200ms var(--ease-standard); }
.lightbox::backdrop { background: color-mix(in oklch, var(--surface-dark) 90%, transparent); backdrop-filter: blur(8px); }
.lightbox figure { display: flex; flex-direction: column; align-items: center; }
.lightbox figure img { max-width: 100%; max-height: 72dvh; object-fit: contain; }
.lightbox figcaption { padding-top: 18px; color: var(--text-muted-on-dark); text-align: center; }
.lightbox-close,
.lightbox-nav {
  position: absolute;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--text-on-dark);
  border: 1px solid var(--border-dark);
  border-radius: 50%;
  background: var(--surface-panel);
  font-family: var(--font-mono);
  font-size: 23px;
  transition: color 180ms ease-out, border-color 180ms ease-out, transform 180ms ease-out;
}
.lightbox-close:hover,
.lightbox-nav:hover { color: var(--accent); border-color: var(--accent); }
.lightbox-close:active,
.lightbox-nav:active { transform: scale(0.94); }
.lightbox-close { top: 10px; right: 12px; }
.lightbox-nav { top: 48%; }
.lightbox-prev { left: 14px; }
.lightbox-next { right: 14px; }

/* Motion */
@keyframes grid-pan { to { background-position: 64px 64px; } }
@keyframes monitor-float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes signal-pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in oklch, var(--accent) 45%, transparent); }
  75%, 100% { box-shadow: 0 0 0 8px transparent; }
}
@keyframes cta-pulse { 0%, 100% { opacity: 0; transform: scale(0.98); } 50% { opacity: 0.28; transform: scale(1); } }
@keyframes dialog-enter { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }

/* Responsive */
@media (max-width: 1180px) {
  .header-inner { gap: 20px; }
  .site-nav { gap: 18px; }
  .site-nav a { font-size: 13px; }
  .brand-site { display: none; }
  .brand-separator { display: none; }
  .hero-inner { gap: 40px; }
  .hero h1 { font-size: clamp(3rem, 5.8vw, 4.5rem); }
  .infra-layout { gap: 40px; }
  .infra-title { font-size: 18px; }
  .service-row { grid-template-columns: 40px minmax(0, 0.85fr) minmax(0, 1.2fr) minmax(110px, auto); gap: 20px; }
}

@media (max-width: 960px) {
  :root { --header-height: 68px; }
  .header-phone { margin-left: auto; }
  .site-nav {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: grid;
    gap: 0;
    padding: 10px 24px 18px;
    border-bottom: 1px solid var(--border-dark);
    background: color-mix(in oklch, var(--surface-dark) 97%, transparent);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity 180ms ease-out, transform 180ms ease-out, visibility 180ms;
  }
  .site-nav.is-open { opacity: 1; visibility: visible; pointer-events: auto; transform: translateY(0); }
  .site-nav a { min-height: 50px; border-bottom: 1px solid var(--border-dark); font-size: 15px; }
  .site-nav a:last-child { border-bottom: 0; }
  .site-nav a::after { display: none; }
  .menu-toggle { display: inline-flex; }
  .hero { padding-top: 112px; }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; }
  .hero-copy { max-width: 720px; }
  .hero h1 { max-width: none; }
  .facility-monitor { max-width: none; justify-self: stretch; }
  .hero-specs { margin-top: 0; }
  .section { padding: 88px 0; }
  .section-intro { grid-template-columns: 1fr; gap: 24px; }
  .section-summary { padding-top: 0; }
  .building-grid { gap: 48px; }
  .infra-layout { grid-template-columns: 1fr; }
  .infra-visual { position: static; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); gap: 24px; align-items: center; }
  .infra-visual figcaption { margin-top: 0; }
  .infra-visual-meta { grid-column: 2; margin-top: -70px; border: 0; }
  .gallery-grid { grid-template-rows: 270px 270px 300px; }
  .service-row { grid-template-columns: 36px minmax(0, 1fr) auto; }
  .service-row p { grid-column: 2; }
  .service-row > strong { grid-column: 3; grid-row: 1 / 3; }
  .location-grid { gap: 44px; }
  .faq-grid { gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .footer-main { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 720px) {
  body { padding-bottom: calc(60px + env(safe-area-inset-bottom)); }
  .container { width: calc(100% - 32px); }
  .header-inner { gap: 12px; }
  .brand img { width: 96px; }
  .header-phone { display: none; }
  .menu-toggle { margin-left: auto; }
  .hero { min-height: auto; padding: 104px 0 32px; }
  .hero-grid { background-size: 48px 48px; }
  .hero h1 { margin-top: 20px; font-size: clamp(2.65rem, 12vw, 4.1rem); line-height: 1.12; }
  .hero-keywords { margin-top: 20px; font-size: 13px; letter-spacing: 0.04em; }
  .hero-lead { font-size: 16px; }
  .hero-actions { align-items: stretch; gap: 12px 20px; }
  .hero-actions .button { width: 100%; }
  .hero-actions .text-link { width: auto; }
  .hero-address { font-size: 12px; }
  .facility-monitor { animation: none; }
  .monitor-bar { min-height: 42px; padding: 0 12px; font-size: 9px; }
  .monitor-image { aspect-ratio: 4 / 3; }
  .metric-dial { right: 12px; bottom: 12px; width: 96px; height: 96px; }
  .metric-dial strong { font-size: 16px; }
  .monitor-readout > div { padding: 12px 10px; }
  .monitor-readout strong { font-size: 19px; }
  .monitor-readout small { font-size: 9px; }
  .hero-specs { grid-template-columns: repeat(2, 1fr); }
  .hero-specs > div { padding: 16px 12px; }
  .hero-specs > div:first-child { padding-left: 12px; }
  .hero-specs > div + div { border-left: 0; }
  .hero-specs > div:nth-child(even) { border-left: 1px solid var(--border-dark); }
  .hero-specs > div:nth-child(n+3) { border-top: 1px solid var(--border-dark); }
  .hero-specs dd { font-size: 23px; }
  .section { padding: 72px 0; }
  .section h2,
  .contact-section h2 { font-size: clamp(2.1rem, 10vw, 3.2rem); }
  .section-kicker { font-size: 10px; }
  .section-summary { font-size: 15px; }
  .campus-figure { margin-top: 40px; }
  .campus-figure img { aspect-ratio: 16 / 9; }
  .campus-figure figcaption { flex-direction: column; gap: 2px; font-size: 10px; }
  .building-grid { grid-template-columns: 1fr; gap: 40px; margin-top: 48px; }
  .building-copy h3 { max-width: none; }
  .fact-ledger > div { grid-template-columns: 0.7fr 1.3fr; gap: 16px; }
  .fact-ledger dd { font-size: 14px; }
  .infra-layout { margin-top: 48px; }
  .infra-item summary { grid-template-columns: 28px minmax(0, 1fr) 30px; min-height: 86px; gap: 10px; }
  .infra-title { font-size: 17px; }
  .infra-content { padding: 0 0 26px 38px; font-size: 14px; }
  .infra-visual { display: block; }
  .infra-visual figcaption { margin-top: 12px; }
  .infra-visual-meta { margin-top: 12px; border-top: 1px solid var(--border-dark); }
  .gallery-grid { grid-template-columns: 1fr; grid-template-rows: none; gap: 12px; margin-top: 44px; }
  .gallery-item { grid-column: auto; grid-row: auto; aspect-ratio: 4 / 3; }
  .gallery-item-1,
  .gallery-item-6 { aspect-ratio: 16 / 9; }
  .gallery-caption { right: 16px; bottom: 14px; left: 16px; }
  .gallery-caption strong { font-size: 16px; }
  .service-list { margin-top: 44px; }
  .service-row { grid-template-columns: 28px minmax(0, 1fr); gap: 8px 14px; padding: 24px 0; }
  .service-row h3 { font-size: 20px; }
  .service-row p { grid-column: 2; font-size: 14px; }
  .service-row > strong { grid-column: 2; grid-row: auto; justify-self: start; font-size: 17px; }
  .location-grid { grid-template-columns: 1fr; gap: 40px; }
  .location-media img { aspect-ratio: 16 / 10; }
  .location-content > address { font-size: 16px; }
  .distance-list > div { gap: 16px; }
  .distance-list dt { font-size: 13px; }
  .distance-list dd { font-size: 20px; }
  .faq-grid { grid-template-columns: 1fr; gap: 40px; }
  .faq-list summary { min-height: 74px; font-size: 16px; }
  .faq-list details p { padding-right: 12px; font-size: 14px; }
  .contact-section { padding: 72px 0; }
  .contact-phone-panel > a { font-size: clamp(2rem, 10vw, 3rem); }
  .footer-main { grid-template-columns: 1fr; gap: 28px; padding-top: 40px; padding-bottom: 36px; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 4px; }
  .footer-note { margin-top: 8px; }
  .mobile-call {
    position: fixed;
    z-index: 45;
    right: 0;
    bottom: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
    gap: 10px;
    padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
    color: var(--surface-dark);
    background: var(--accent);
    font-weight: 750;
    box-shadow: 0 -1px 0 color-mix(in oklch, var(--surface-dark) 20%, transparent);
  }
  .lightbox { width: calc(100% - 24px); padding: 60px 12px 80px; }
  .lightbox figure img { max-height: 66dvh; }
  .lightbox-nav { top: auto; bottom: 18px; }
  .lightbox-prev { left: calc(50% - 54px); }
  .lightbox-next { right: calc(50% - 54px); }
}

@media (max-width: 390px) {
  .hero h1 { font-size: 2.6rem; }
  .hero-actions .button { padding-inline: 12px; font-size: 14px; }
  .monitor-readout span { font-size: 8px; }
  .hero-specs dd { font-size: 20px; }
  .fact-ledger > div { grid-template-columns: 1fr; gap: 4px; }
  .distance-list > div { align-items: flex-start; }
  .distance-list .distance-text { max-width: 150px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}