:root {
  --ink: #142338;
  --ink-2: #1c314c;
  --muted: #607087;
  --line: #d8e3f1;
  --blue: #155eef;
  --blue-dark: #103e9e;
  --cta: #f0a33a;
  --cta-hover: #e09228;
  --amber: #ffb547;
  --bg: #f6f8fc;
  --white: #fff;
  --shadow: 0 18px 50px rgba(20, 35, 56, 0.12);
  --gutter: clamp(20px, 5vw, 60px);
  --max: 1180px;
  --header: 72px;
  --radius: 8px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font: 400 16px/1.55 "Golos Text", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
button, input, textarea, select { font: inherit; }
h1, h2, h3, h4 { font-family: Geologica, Arial, sans-serif; letter-spacing: -0.035em; line-height: 1.15; margin: 0; }
p { margin: 0; }

.skip {
  position: absolute; left: -999px; top: 8px;
}
.skip:focus { left: 8px; background: #fff; padding: 8px 12px; z-index: 100; }

.wrap { width: min(var(--max), calc(100% - 2 * var(--gutter))); margin-inline: auto; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  height: var(--header);
  background: var(--ink);
  color: #fff;
}
.header__inner {
  height: 100%;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.logo { display: block; line-height: 0; }
.logo img { height: 46px; width: auto; }
.nav {
  display: flex; justify-content: center;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 999px;
  padding: 4px;
  width: max-content;
  margin: 0 auto;
}
.nav a {
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
  padding: 8px 16px;
  border-radius: 999px;
  color: rgba(255,255,255,.82);
}
.nav a:hover, .nav a:focus-visible { background: rgba(255,255,255,.1); color: #fff; }
.header__phone { text-align: right; text-decoration: none; }
.header__phone strong { display: block; font-size: 15px; letter-spacing: -0.02em; }
.header__phone span { display: block; font-size: 11px; color: rgba(255,255,255,.55); }
.burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid rgba(255,255,255,.15);
  background: transparent; color: #fff; border-radius: 8px;
}

/* Hero */
.hero {
  position: relative;
  min-height: min(92vh, 820px);
  color: #fff;
  display: grid;
  align-items: stretch;
  background: #0c1726;
  isolation: isolate;
  overflow: hidden;
}
.hero-photos {
  position: absolute;
  inset: 0 0 0 auto;
  width: 55%;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  mask-image: linear-gradient(90deg, transparent, #000 16%);
}
.hero-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 75% 0;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}
.hero-photo.is-current { opacity: 1; }
.hero-photos::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10,18,30,1) 0%, rgba(10,18,30,.93) 8%, rgba(10,18,30,.55) 30%, rgba(10,18,30,.1) 58%, transparent 78%),
    linear-gradient(0deg, rgba(10,18,30,.55), transparent 36%);
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: end;
  padding: 48px 0 56px;
  min-height: min(92vh, 820px);
}
.hero__copy { max-width: 65%; }
.eyebrow {
  display: flex; align-items: center; gap: 9px;
  font-size: 11px; font-weight: 500; letter-spacing: .09em; text-transform: uppercase;
  color: rgba(255,255,255,.72); margin-bottom: 18px;
}
.eyebrow::before { content: ""; width: 6px; height: 6px; background: var(--amber); }
.hero h1 {
  font-size: clamp(36px, 5.4vw, 64px);
  font-weight: 600;
  max-width: 12ch;
  margin-bottom: 18px;
}
.hero__lead {
  max-width: 46ch;
  font-size: 16px;
  color: rgba(255,255,255,.82);
  margin-bottom: 28px;
}
.hero__lead strong { color: #fff; font-weight: 500; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  --mx: 0px; --my: 0px;
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 48px; padding: 0 22px;
  border-radius: 6px; border: 0;
  text-decoration: none; cursor: pointer;
  font-weight: 600; font-size: 15px;
  transform: translate3d(var(--mx), var(--my), 0);
  transition: .2s background, .2s color, .2s border, transform .55s cubic-bezier(.16,1,.3,1);
}
.btn--cta { background: var(--cta); color: var(--ink); }
.btn--cta:hover { background: var(--cta-hover); }
.btn--ghost { background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.35); }
.btn--ghost:hover { background: rgba(255,255,255,.08); }
.btn--blue { background: var(--blue); color: #fff; }
.btn--blue:hover { background: var(--blue-dark); }
.btn--full { width: 100%; }

@media (prefers-reduced-motion: reduce) {
  .hero-photo, .hero-caption, .hero-dot-track, .btn, .cost-item__icon, .service__n, .install__track, .rv { transition: none; }
  html.js .rv { opacity: 1; transform: none; }
}

.hero-card {
  position: absolute; right: 0; bottom: 56px;
  width: min(300px, 32vw);
  background: rgba(14, 26, 42, .92);
  padding: 18px 18px 10px;
  backdrop-filter: blur(6px);
}
.hero-card::before,
.hero-card::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 18px;
  border-color: var(--amber);
  border-style: solid;
  pointer-events: none;
}
.hero-card::before { left: 0; top: 0; border-width: 2px 0 0 2px; }
.hero-card::after { right: 0; bottom: 0; border-width: 0 2px 2px 0; }
.hero-captions { display: grid; }
.hero-caption {
  grid-area: 1 / 1;
  opacity: 0;
  transform: translateY(3px);
  transition: opacity .16s, transform .16s;
  pointer-events: none;
  min-height: 77px;
}
.hero-caption.is-current {
  opacity: 1;
  transform: none;
  transition-duration: .32s;
  transition-delay: .18s;
}
.hero-caption small {
  display: block;
  letter-spacing: .055em;
  text-transform: uppercase;
  font-size: 12px;
  line-height: 1.5;
  color: #d6e2f0;
  margin-bottom: 8px;
}
.hero-caption span { display: block; font-size: 17px; line-height: 1.45; font-weight: 500; }
.hero-dots {
  display: flex;
  align-items: center;
  gap: 0;
  margin-top: 10px;
  padding-top: 4px;
  border-top: 1px solid rgba(183, 199, 221, .22);
}
.hero-dots button {
  width: 44px;
  flex: 0 1 44px;
  min-width: 0;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: 0;
  cursor: pointer;
  color: #c4d2e4;
}
.hero-dot-track {
  display: block;
  width: 32px;
  max-width: calc(100% - 12px);
  height: 3px;
  border-radius: 2px;
  overflow: hidden;
  background: #a9bbd1;
  opacity: .55;
  transition: background-color .24s, opacity .24s;
}
.hero-dots button:hover .hero-dot-track { opacity: 1; }
.hero-dots button[aria-pressed="true"] .hero-dot-track {
  background: rgba(255, 181, 71, .25);
  opacity: 1;
}
.hero-dot-progress {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--amber);
  transform: scaleX(var(--hero-slide-progress, 0));
  transform-origin: left center;
  opacity: 0;
}
.hero-dots button[aria-pressed="true"] .hero-dot-progress { opacity: 1; }

/* Services */
.services {
  background: #fff;
  padding: 28px 0 8px;
  border-bottom: 1px solid var(--line);
}
.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  position: relative;
}
.services__grid::before {
  content: "";
  position: absolute; left: 6%; right: 6%; top: 28px;
  border-top: 1px dashed #c9d6e8;
  z-index: 0;
}
.service { position: relative; z-index: 1; padding: 0 8px 28px; }
.service__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.service__n {
  width: 56px; height: 56px; border-radius: 50%;
  background: #fff; border: 1px solid var(--line);
  box-shadow: 0 0 0 8px #fff;
  display: grid; place-items: center;
  color: var(--blue);
  flex-shrink: 0;
}
.service__n svg { width: 34px; height: 34px; display: block; }
.service__index {
  font: 400 12px/1.4 Geologica, sans-serif;
  letter-spacing: .12em;
  font-variant-numeric: tabular-nums;
  color: #526277;
  background: #fff;
  padding: 6px 8px;
}
.service__index::before {
  content: "";
  display: inline-block;
  width: 5px; height: 5px;
  vertical-align: 2px;
  margin-right: 8px;
  background: var(--amber);
}
.service h3 { font-size: 18px; font-weight: 500; margin-bottom: 8px; }
.service p { color: var(--muted); font-size: 14px; max-width: 28ch; }
.service__n { transition: transform .55s cubic-bezier(.16,1,.3,1); }
.service:hover .service__n { transform: scale(1.06); }

section { padding: 88px 0; }
.section--bg { background: var(--bg); }
.section--dark {
  position: relative;
  overflow: hidden;
  background: #0c1726;
  color: #fff;
}
.section--dark::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -30%;
  width: min(780px, 90vw);
  aspect-ratio: 1;
  background: radial-gradient(closest-side, rgba(255,181,71,.14), transparent 72%);
  pointer-events: none;
}
.section--dark .section__head p { color: rgba(255,255,255,.65); }
.section__head { max-width: 640px; margin-bottom: 36px; }
.section__head h2 { font-size: clamp(28px, 3.4vw, 44px); margin-bottom: 12px; }
.section__head p { color: var(--muted); font-size: 16px; }

/* Objects */
.objects { display: grid; grid-template-columns: 280px 1fr; gap: 28px; align-items: start; }
.object-nav { display: grid; gap: 8px; }
.object-nav button {
  text-align: left; background: #fff; border: 1px solid var(--line);
  border-radius: 8px; padding: 14px 16px; cursor: pointer; color: var(--ink);
}
.object-nav button strong { display: block; font-size: 15px; font-weight: 600; }
.object-nav button span { color: var(--muted); font-size: 13px; }
.object-nav button[aria-selected="true"] {
  background: var(--ink); color: #fff; border-color: var(--ink);
}
.object-nav button[aria-selected="true"] span { color: rgba(255,255,255,.65); }
.object-view {
  min-height: 420px;
  border-radius: 10px;
  overflow: hidden;
  position: relative;
  background: #122033 center/cover no-repeat;
  color: #fff;
}
.object-view__cap {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 22px 24px;
  background: linear-gradient(transparent, rgba(8,14,24,.8));
}
.object-view h3 { font-size: 26px; margin-bottom: 6px; }
.zones { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 22px; }
.zone { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 18px; }
.zone b { display: block; color: var(--blue); font-size: 12px; margin-bottom: 8px; }
.zone h4 { font-size: 16px; font-weight: 500; margin-bottom: 6px; }
.zone p { font-size: 14px; color: var(--muted); }

/* Cost */
.cost { display: grid; grid-template-columns: 1.3fr .7fr; gap: 28px; position: relative; }
.cost-list { display: grid; gap: 0; }
.cost-item {
  --sx: -200px; --sy: -200px;
  display: grid; grid-template-columns: 56px 1fr; gap: 16px;
  padding: 22px 12px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  position: relative;
  isolation: isolate;
  border-radius: 10px;
  transition: background .35s;
}
.cost-item::before {
  content: "";
  position: absolute; inset: 0; z-index: -1; border-radius: inherit;
  background: radial-gradient(320px circle at var(--sx) var(--sy), rgba(255,181,71,.16), transparent 62%);
  opacity: 0;
  transition: opacity .45s;
  pointer-events: none;
}
.cost-item:hover { background: rgba(255,255,255,.03); }
.cost-item:hover::before { opacity: 1; }
.cost-item__icon {
  width: 56px; height: 56px; border-radius: 14px;
  display: grid; place-items: center;
  color: var(--amber);
  background: linear-gradient(160deg, rgba(255,255,255,.14), rgba(255,255,255,.04));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.22), inset 0 0 0 1px rgba(255,255,255,.08);
  transition: transform .55s cubic-bezier(.16,1,.3,1);
}
.cost-item__icon svg { width: 28px; height: 28px; display: block; }
.cost-item:hover .cost-item__icon { transform: scale(1.06); }
.cost-item__n {
  display: block;
  font: 500 12px/1.4 Geologica, sans-serif;
  letter-spacing: .12em;
  color: var(--amber);
  margin-bottom: 6px;
}
.cost-item h3 { font-size: 20px; font-weight: 500; margin-bottom: 6px; }
.cost-item p { color: rgba(255,255,255,.62); font-size: 14px; }
.cost-card {
  background: rgba(255,255,255,.06);
  color: #fff;
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 10px; padding: 28px;
  align-self: start;
  backdrop-filter: blur(12px);
}
.cost-card h3 { font-size: 24px; margin-bottom: 18px; }
.cost-card ol { margin: 0 0 22px; padding: 0; list-style: none; display: grid; gap: 14px; }
.cost-card li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; color: rgba(255,255,255,.78); font-size: 14px; }
.cost-card li b { color: var(--amber); }

/* Process */
.process {
  display: grid; grid-template-columns: 1fr 1fr;
  border: 1px solid var(--line); border-radius: 8px; overflow: hidden;
  background: #fff;
}
.process__visual {
  min-height: 420px;
  background: #eff4fb;
  position: relative;
  overflow: hidden;
}
.process__visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity .8s ease;
}
.process__visual img.is-current { opacity: 1; }
.process__visual::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(#dce6f54d 1px, transparent 1px), linear-gradient(90deg, #dce6f54d 1px, transparent 1px);
  background-size: 32px 32px; mix-blend-mode: multiply; pointer-events: none;
}
.process__visual-label {
  position: absolute; z-index: 1;
  left: 18px; top: 18px;
  display: flex; align-items: center; gap: 8px;
  font-size: 11px; letter-spacing: .06em; text-transform: uppercase;
  color: #fff;
  background: rgba(14, 24, 38, .72);
  padding: 8px 12px;
  backdrop-filter: blur(6px);
}
.process__visual-label b {
  width: 6px; height: 6px; background: var(--amber); flex-shrink: 0;
}
.process__panel { padding: 32px 36px; }
.process__count { display: flex; align-items: baseline; gap: 10px; margin-bottom: 16px; color: #c7d6ed; }
.process__count b { font: 300 64px/1 Geologica, sans-serif; }
.process__panel h3 { font-size: 28px; margin-bottom: 12px; }
.process__panel p { color: var(--muted); margin-bottom: 18px; }
.result { border-left: 2px solid var(--amber); padding-left: 14px; margin-bottom: 20px; }
.result small { display: block; text-transform: uppercase; letter-spacing: .08em; color: #7a8ba3; font-size: 10px; margin-bottom: 6px; }
.process-nav { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); }
.process-nav button {
  position: relative;
  background: #f8faff; border: 0; border-right: 1px solid var(--line);
  min-height: 92px; padding: 18px 16px 16px; text-align: left; cursor: pointer; color: var(--muted);
  transition: background .2s, color .2s;
}
.process-nav button:last-child { border-right: 0; }
.process-nav button::before,
.process-nav button::after {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 4px;
}
.process-nav button::before { background: rgba(255, 181, 71, .2); }
.process-nav button::after {
  background: #ffb547;
  transform: scaleX(0);
  transform-origin: left center;
}
.process-nav button[aria-selected="true"]::after {
  transform: scaleX(var(--stage-progress, 0));
}
.process-nav button span { display: block; font-size: 11px; margin-bottom: 6px; }
.process-nav strong { display: block; color: var(--ink); font-size: 14px; font-weight: 500; }
.process-nav button[aria-selected="true"] { background: var(--ink); color: #fff; }
.process-nav button[aria-selected="true"] span { color: #ffb547; }
.process-nav button[aria-selected="true"] strong { color: #fff; }
.process-nav button:hover:not([aria-selected="true"]) { background: #e9f0fc; color: var(--blue); }

/* Installation slider */
.install-head {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  align-items: end;
  gap: 40px;
  margin-bottom: 32px;
}
.install-head .eyebrow { color: var(--muted); }
.install-head h2 { font-size: clamp(30px, 3.8vw, 52px); font-weight: 600; line-height: 1.12; }
.install-head > p { max-width: 390px; margin: 0; color: #526277; font-size: 15px; line-height: 1.65; }
.install { position: relative; }
.install__stage {
  display: grid;
  grid-template-columns: 1.35fr .65fr;
  border: 1px solid #dce4ef;
  border-radius: 8px;
  overflow: hidden;
  background: var(--ink);
  color: #fff;
  box-shadow: 0 12px 32px rgba(20, 35, 56, .04);
}
.install__photo {
  position: relative;
  height: 510px;
  background: #0e1928;
  overflow: hidden;
  cursor: pointer;
  touch-action: pan-y pinch-zoom;
}
.install__track {
  display: flex;
  height: 100%;
  transition: transform .55s cubic-bezier(.16, 1, .3, 1);
  will-change: transform;
}
.install__track img {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  user-select: none;
  -webkit-user-drag: none;
  pointer-events: none;
}
.install__zoom {
  position: absolute;
  right: 20px;
  bottom: 20px;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 3px;
  background: rgba(255, 255, 255, .93);
  color: var(--ink);
  cursor: pointer;
}
.install__zoom svg { width: 20px; height: 20px; }
.install__info {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 36px;
  border-left: 1px solid rgba(255, 255, 255, .09);
}
.install__count {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: auto;
  padding-bottom: 36px;
  color: #b2c3d8;
  font-family: Geologica, Arial, sans-serif;
  font-size: 13px;
  white-space: nowrap;
}
.install__count b {
  color: var(--amber);
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -.04em;
}
.install__slides { position: relative; min-height: 210px; }
.install__slide { display: none; }
.install__slide.is-on { display: block; }
.install__cat {
  margin: 0 0 14px;
  font-size: 10px;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: #b2c3d8;
}
.install__info h3 {
  max-width: 16ch;
  margin: 0 0 18px;
  font-size: clamp(24px, 2.2vw, 32px);
  font-weight: 500;
  line-height: 1.22;
  letter-spacing: -.03em;
}
.install__slide p:last-child {
  margin: 0;
  color: #c6d3e5;
  font-size: 14px;
  line-height: 1.65;
}
.install__nav { display: flex; gap: 8px; margin-top: 28px; }
.install__nav button {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, .25);
  border-radius: 3px;
  background: transparent;
  color: #fff;
  cursor: pointer;
}
.install__nav button:hover { background: var(--amber); border-color: var(--amber); color: var(--ink); }
.install__nav svg { width: 20px; height: 20px; }
.install__thumbs {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}
.install__thumbs button {
  position: relative;
  aspect-ratio: 4 / 3;
  padding: 0;
  border: 2px solid transparent;
  border-radius: 4px;
  background: #edf2f8;
  overflow: hidden;
  opacity: .65;
  cursor: pointer;
  transition: opacity .18s, border-color .18s;
}
.install__thumbs img { width: 100%; height: 100%; object-fit: cover; }
.install__thumbs button:hover { opacity: 1; }
.install__thumbs button[aria-pressed="true"] { border-color: var(--blue); opacity: 1; }
.install__live {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}
.install-note {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 28px;
  margin-top: 28px;
  padding: 26px 28px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.install-note > div { display: flex; align-items: center; gap: 16px; min-width: 0; }
.install-note > div + div { padding-left: 28px; border-left: 1px solid #dce4ef; }
.install-note svg { width: 30px; height: 30px; flex-shrink: 0; color: var(--blue); }
.install-note small { display: block; margin-bottom: 6px; font-size: 11px; color: var(--muted); }
.install-note strong {
  display: block;
  font: 500 18px/1.4 Geologica, Arial, sans-serif;
  letter-spacing: -.025em;
  color: var(--ink);
}
.install-foot {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid #dce4ef;
}
.install-foot p { margin: 0; color: #526277; font-size: 14px; }
.install-foot__btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 48px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--blue);
  font-weight: 500;
  font-size: 14px;
  cursor: pointer;
}
.install-foot__btn svg { width: 19px; height: 19px; }
.install-foot__btn:hover { color: var(--blue-dark); }

html.js .rv {
  opacity: 0;
  transform: translate3d(0, 26px, 0) scale(.985);
  transition: opacity .7s ease, transform 1s cubic-bezier(.16,1,.3,1);
  transition-delay: var(--rv-delay, 0ms);
}
html.js .rv.in { opacity: 1; transform: none; }
.services__grid .service:nth-child(1), .cost-list .cost-item:nth-child(1) { --rv-delay: 0ms; }
.services__grid .service:nth-child(2), .cost-list .cost-item:nth-child(2) { --rv-delay: 80ms; }
.services__grid .service:nth-child(3), .cost-list .cost-item:nth-child(3) { --rv-delay: 160ms; }
.services__grid .service:nth-child(4), .cost-list .cost-item:nth-child(4) { --rv-delay: 240ms; }
.cost-card { --rv-delay: 180ms; }
/* FAQ */
.faq { display: grid; gap: 8px; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 4px 18px;
}
.faq summary {
  cursor: pointer; list-style: none;
  display: grid; grid-template-columns: 42px 1fr; gap: 8px; align-items: center;
  min-height: 64px; font-family: Geologica, sans-serif; font-weight: 500;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary span { color: var(--blue); font-size: 13px; }
.faq p { color: var(--muted); padding: 0 0 18px 50px; font-size: 15px; }

/* CTA */
.cta {
  background: var(--ink) url("../images/control-room.jpg") center/cover;
  color: #fff; position: relative; isolation: isolate;
}
.cta::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(90deg, rgba(14,24,38,.94) 0 48%, rgba(14,24,38,.72));
}
.cta-grid { display: grid; grid-template-columns: 1fr .9fr; gap: 40px; align-items: start; }
.cta h2 { font-size: clamp(28px, 3.4vw, 42px); margin: 12px 0 14px; }
.cta p { color: rgba(255,255,255,.75); max-width: 46ch; margin-bottom: 22px; }
.messengers { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  min-height: 40px; padding: 0 12px; border-radius: 999px;
  border: 1px solid rgba(255,255,255,.18); color: #fff; text-decoration: none; font-size: 13px;
}
.chip:hover { background: rgba(255,255,255,.08); }
.form {
  background: #fff; color: var(--ink);
  border-radius: 10px; padding: 24px;
}
.form h3 { font-size: 22px; margin-bottom: 6px; }
.form .hint { color: var(--muted); font-size: 13px; margin-bottom: 16px; }
.field { display: grid; gap: 6px; margin-bottom: 12px; }
.field label { font-size: 12px; color: var(--muted); }
.field input, .field textarea, .field select {
  width: 100%; border: 1px solid var(--line); border-radius: 6px;
  min-height: 44px; padding: 10px 12px; background: #fbfcfe;
}
.field textarea { min-height: 88px; resize: vertical; }
.check { display: flex; gap: 8px; align-items: flex-start; font-size: 12px; color: var(--muted); margin: 8px 0 14px; }
.check a { color: var(--blue); }
.form-status { min-height: 1.2em; font-size: 13px; margin-top: 8px; }

/* Footer */
.footer { background: #0e1826; color: rgba(255,255,255,.72); padding: 48px 0 24px; font-size: 14px; }
.footer a { color: #fff; text-decoration: none; }
.footer__grid { display: grid; grid-template-columns: 1.1fr 1fr 1.2fr; gap: 28px; margin-bottom: 28px; }
.footer h3 { color: #fff; font-size: 16px; margin-bottom: 12px; }
.footer address { font-style: normal; }
.footer__copy { border-top: 1px solid rgba(255,255,255,.08); padding-top: 18px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 12px; }
.map { width: 100%; height: 220px; border: 0; border-radius: 8px; filter: grayscale(.2); }

/* Modal / lightbox */
.modal, .lightbox {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(7, 16, 30, .91);
  display: grid; place-items: center; padding: 16px;
}
.modal[hidden], .lightbox[hidden] { display: none; }
.modal { background: rgba(8,14,24,.72); }
.modal__box {
  width: min(460px, 100%);
  background: #fff; border-radius: 12px; padding: 24px;
  position: relative;
}
.modal__close {
  position: absolute; top: 10px; right: 10px;
  width: 40px; height: 40px; border: 0; background: transparent; cursor: pointer; font-size: 24px;
}
.lightbox__panel {
  display: flex;
  flex-direction: column;
  width: min(1180px, 100%);
  max-height: calc(100dvh - 32px);
  overflow: hidden;
  border: 1px solid rgba(139, 160, 188, .27);
  border-radius: 8px;
  background: #0e1928;
  color: #fff;
}
.lightbox__top, .lightbox__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 16px;
  flex-shrink: 0;
}
.lightbox__top { border-bottom: 1px solid rgba(255,255,255,.15); }
.lightbox__bottom { border-top: 1px solid rgba(255,255,255,.15); }
.lightbox__top h3 { margin: 0; font-size: 14px; font-weight: 400; font-family: "Golos Text", Arial, sans-serif; letter-spacing: 0; }
.lightbox__close {
  display: grid; place-items: center;
  width: 44px; height: 44px; flex-shrink: 0;
  border: 1px solid rgba(255,255,255,.25); border-radius: 3px;
  background: transparent; color: #fff; cursor: pointer; font-size: 24px;
}
.lightbox__panel > img {
  display: block;
  width: 100%;
  height: min(72dvh, 760px);
  object-fit: contain;
  background: #0e1928;
}
.lightbox__bottom span { color: #b2c3d8; font-size: 14px; }
.lightbox__bottom .install__nav { margin-top: 0; }

.thanks, .legal { max-width: 720px; margin: 40px auto 80px; padding: 0 var(--gutter); }
.legal h1 { margin-bottom: 16px; }
.legal h2 { font-size: 20px; margin: 24px 0 8px; }
.legal p, .legal li { color: var(--muted); margin-bottom: 10px; }

@media (max-width: 980px) {
  .nav { display: none; }
  .nav.is-open {
    display: flex; flex-direction: column;
    position: absolute; top: var(--header); left: 0; right: 0;
    background: var(--ink); width: auto; border-radius: 0; padding: 12px;
  }
  .burger { display: grid; place-items: center; }
  .header__inner { grid-template-columns: auto 1fr auto; }
  .services__grid, .objects, .cost, .cta-grid, .footer__grid, .process { grid-template-columns: 1fr; }
  .services__grid::before { display: none; }
  .service {
    display: grid;
    grid-template-columns: 56px minmax(0, 1fr);
    column-gap: 20px;
    align-items: start;
  }
  .service__top { display: block; margin-bottom: 0; grid-row: 1 / span 2; }
  .service__index { display: none; }
  .service h3, .service p { grid-column: 2; }
  .hero { min-height: min(72vh, 640px); display: block; padding-bottom: 20px; }
  .hero-photos {
    position: absolute;
    inset: 0;
    width: 100%;
    mask-image: none;
  }
  .hero-photo { object-position: 80% 0; }
  .hero-photos::after {
    background:
      linear-gradient(180deg, rgba(10,18,30,.05) 0%, rgba(10,18,30,.2) 13%, rgba(10,18,30,.72) 31%, rgba(10,18,30,.91) 45%, rgba(10,18,30,.95) 58%, rgba(10,18,30,.93) 100%),
      linear-gradient(90deg, rgba(10,18,30,.78) 0%, rgba(10,18,30,.4) 48%, transparent 78%);
  }
  .hero__inner { min-height: min(72vh, 640px); padding: 24px 0 20px; }
  .hero__copy { max-width: none; }
  .hero-card {
    position: relative;
    right: auto;
    bottom: auto;
    width: auto;
    max-width: none;
    margin-top: 28px;
    padding: 12px 14px 0;
    background: rgba(14, 26, 42, .61);
  }
  .hero-caption { min-height: 66px; }
  .hero-caption small { margin-bottom: 4px; }
  .hero-caption span { font-size: 15px; }
  .hero-dots { margin-top: 4px; padding-top: 0; }
  .hero-dots button { height: 44px; }
  .install-head, .install__stage, .install-note { grid-template-columns: 1fr; }
  .install-head > p { max-width: none; }
  .install__photo { height: 320px; }
  .install__info { border-left: 0; border-top: 1px solid rgba(255,255,255,.09); padding: 24px; }
  .install__count { padding-bottom: 18px; }
  .install__slides { min-height: 0; }
  .install__thumbs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .install-note > div + div { padding-left: 0; border-left: 0; padding-top: 18px; border-top: 1px solid #dce4ef; }
  .zones { grid-template-columns: 1fr; }
  .process-nav { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  section { padding: 56px 0; }
  .header__phone span { display: none; }
  .install__photo { height: 240px; }
  .install__thumbs { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .install-foot { flex-direction: column; align-items: flex-start; }
}

.faq details:nth-child(1) { --rv-delay: 0ms; }
.faq details:nth-child(2) { --rv-delay: 50ms; }
.faq details:nth-child(3) { --rv-delay: 100ms; }
.faq details:nth-child(4) { --rv-delay: 150ms; }
.faq details:nth-child(5) { --rv-delay: 200ms; }
.faq details:nth-child(6) { --rv-delay: 250ms; }
.faq details:nth-child(7) { --rv-delay: 300ms; }

@media (prefers-reduced-motion: reduce) {
  html.js .rv, html.js .rv.in { opacity: 1; transform: none; transition: none; }
  .btn { transform: none; }
  .process__visual img { transition: none; }
  .msgr__face, .msgr__item, .msgr__x { transition: none; }
}

/* Мессенджеры */
.msgr {
  --msgr-color: #3976F7;
  position: fixed;
  z-index: 60;
  right: 28px;
  bottom: 28px;
  width: 64px;
  height: 64px;
}
.msgr__list {
  position: absolute;
  right: 0;
  bottom: 76px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  pointer-events: none;
}
.msgr.is-open .msgr__list { pointer-events: auto; }
.msgr__item {
  opacity: 0;
  transform: translateY(10px) scale(.92);
  transition: opacity .28s ease, transform .28s ease;
}
.msgr.is-open .msgr__item { opacity: 1; transform: none; }
.msgr.is-open .msgr__item:nth-child(3) { transition-delay: .02s; }
.msgr.is-open .msgr__item:nth-child(2) { transition-delay: .07s; }
.msgr.is-open .msgr__item:nth-child(1) { transition-delay: .12s; }
.msgr__link {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
}
.msgr__label {
  padding: 7px 12px;
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.2;
  white-space: nowrap;
  box-shadow: 0 8px 24px rgba(20, 35, 56, .16);
}
.msgr__bubble {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 8px 22px rgba(20, 35, 56, .22);
}
.msgr__bubble svg { width: 28px; height: 28px; display: block; }
.msgr__mark { width: 34px; height: 34px; display: block; }
.msgr__bubble .msgr__mark { width: 30px; height: 30px; }
.msgr__link--max .msgr__bubble { background: linear-gradient(to right, #3976F7, #943BD5); }
.msgr__link--tg .msgr__bubble { background: #2aabee; }
.msgr__link--wa .msgr__bubble { background: #25d366; }
.msgr__link:hover .msgr__bubble,
.msgr__link:focus-visible .msgr__bubble { transform: scale(1.06); }
.msgr__bubble { transition: transform .2s ease; }
.msgr__toggle {
  position: relative;
  width: 64px;
  height: 64px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 12px 28px color-mix(in srgb, var(--msgr-color) 42%, transparent);
}
.msgr.is-open .msgr__toggle { box-shadow: 0 12px 28px rgba(20, 35, 56, .32); }
.msgr__toggle:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
}
.msgr__face,
.msgr__x {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  opacity: 0;
  transform: scale(.86);
  transition: opacity .45s ease, transform .45s ease;
}
.msgr__face svg,
.msgr__x svg { width: 32px; height: 32px; display: block; }
.msgr__face--max { background: linear-gradient(to right, #3976F7, #943BD5); }
.msgr__face--tg { background: #2aabee; }
.msgr__face--wa { background: #25d366; }
.msgr__face.is-on { opacity: 1; transform: none; }
.msgr__x { background: #142338; transform: scale(.86) rotate(-45deg); }
.msgr.is-open .msgr__face { opacity: 0; transform: scale(.86); }
.msgr.is-open .msgr__x { opacity: 1; transform: none; }
.msgr__link:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 3px;
  border-radius: 12px;
}

@media (max-width: 640px) {
  .msgr { right: 16px; bottom: 16px; width: 56px; height: 56px; }
  .msgr__toggle { width: 56px; height: 56px; }
  .msgr__list { bottom: 68px; gap: 10px; }
  .msgr__bubble { width: 48px; height: 48px; }
  .msgr__bubble svg { width: 26px; height: 26px; }
  .msgr__mark { width: 30px; height: 30px; }
  .msgr__bubble .msgr__mark { width: 26px; height: 26px; }
}