:root {
  --navy-950: #07111f;
  --navy-900: #0b1a2d;
  --navy-850: #10243e;
  --navy-800: #15304f;
  --blue-700: #185c98;
  --blue-600: #1f73b7;
  --blue-500: #2f8bd0;
  --cyan-400: #5dc6d8;
  --orange-600: #e5642a;
  --orange-500: #f37a35;
  --orange-400: #ff975c;
  --white: #ffffff;
  --gray-25: #fcfdfe;
  --gray-50: #f7f9fb;
  --gray-100: #edf1f5;
  --gray-200: #dce3ea;
  --gray-300: #c4ced8;
  --gray-500: #6f7d8b;
  --gray-600: #536171;
  --gray-700: #354253;
  --gray-800: #1f2c3c;
  --green-500: #32a477;
  --shadow-sm: 0 10px 30px rgba(8, 26, 48, 0.08);
  --shadow-md: 0 20px 60px rgba(8, 26, 48, 0.14);
  --shadow-lg: 0 30px 90px rgba(3, 17, 34, 0.24);
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --container: 1200px;
  --header-height: 86px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 24px);
}

body {
  margin: 0;
  color: var(--gray-800);
  background: var(--white);
  font-family:
    Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial,
    "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body,
button,
input,
select,
textarea {
  font: inherit;
}

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

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

button,
input,
select,
textarea {
  border-radius: 0;
}

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

::selection {
  color: var(--white);
  background: var(--blue-700);
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 9999;
  top: 12px;
  left: 12px;
  padding: 10px 16px;
  color: var(--white);
  background: var(--navy-950);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

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

.site-header {
  position: sticky;
  z-index: 1000;
  top: 0;
  min-height: var(--header-height);
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(13, 40, 70, 0.08);
  backdrop-filter: blur(16px);
}

.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  min-height: var(--header-height);
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--white);
  background:
    linear-gradient(145deg, var(--blue-600), var(--navy-850));
  border-radius: 13px;
  box-shadow: 0 10px 24px rgba(24, 92, 152, 0.25);
}

.brand-mark svg {
  width: 30px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 3.4;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-text strong {
  color: var(--navy-900);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.01em;
  text-transform: uppercase;
}

.brand-text small {
  margin-top: 4px;
  color: var(--gray-500);
  font-size: 12px;
  font-weight: 600;
}

.main-nav {
  display: flex;
  align-items: center;
  margin-left: auto;
  gap: 24px;
}

.main-nav a {
  position: relative;
  color: var(--gray-700);
  font-size: 14px;
  font-weight: 700;
  transition: color 0.2s ease;
}

.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: -9px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--orange-500);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: var(--blue-700);
}

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

.header-contact {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.2;
}

.phone-link {
  color: var(--navy-900);
  font-size: 16px;
  font-weight: 800;
}

.header-contact span {
  margin-top: 5px;
  color: var(--gray-500);
  font-size: 11px;
}

.nav-toggle,
.nav-toggle-label {
  display: none;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    color 0.2s ease,
    background-color 0.2s ease,
    border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:focus-visible,
.main-nav a:focus-visible,
.text-link:focus-visible,
.contact-option:focus-visible,
.footer-nav a:focus-visible,
.footer-contacts a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(47, 139, 208, 0.35);
  outline-offset: 4px;
}

.button-small {
  min-height: 44px;
  padding: 10px 16px;
  font-size: 13px;
}

.button-primary {
  color: var(--white);
  background:
    linear-gradient(135deg, var(--orange-500), var(--orange-600));
  box-shadow: 0 14px 30px rgba(229, 100, 42, 0.25);
}

.button-primary:hover {
  box-shadow: 0 18px 36px rgba(229, 100, 42, 0.34);
}

.button-secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(8px);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
}

.button-dark {
  color: var(--white);
  background: var(--navy-900);
}

.button-light {
  color: var(--navy-900);
  background: var(--white);
}

.button-wide {
  width: 100%;
}

.header-button {
  flex: 0 0 auto;
  color: var(--white);
  background: var(--blue-700);
}

.hero {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 80% 10%, rgba(47, 139, 208, 0.34), transparent 28%),
    radial-gradient(circle at 15% 85%, rgba(229, 100, 42, 0.16), transparent 30%),
    linear-gradient(120deg, var(--navy-950), var(--navy-850) 58%, #163a5f);
}

.hero::before {
  position: absolute;
  z-index: 0;
  top: -140px;
  right: -110px;
  width: 520px;
  height: 520px;
  content: "";
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  box-shadow:
    0 0 0 70px rgba(255, 255, 255, 0.018),
    0 0 0 140px rgba(255, 255, 255, 0.012);
}

.hero-grid {
  position: absolute;
  z-index: 0;
  inset: 0;
  opacity: 0.12;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.14) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to right, rgba(0,0,0,0.35), transparent 60%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 700px;
  align-items: center;
  padding-block: 76px 88px;
  grid-template-columns: minmax(0, 1.16fr) minmax(380px, 0.84fr);
  gap: 72px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  margin: 0 0 18px;
  color: var(--cyan-400);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  width: 34px;
  height: 2px;
  margin-right: 12px;
  content: "";
  background: currentColor;
}

.eyebrow-dark {
  color: var(--blue-700);
}

.hero h1,
.section h2,
.contact-strip h2 {
  margin: 0;
  font-weight: 850;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.hero h1 {
  max-width: 830px;
  font-size: clamp(42px, 5.2vw, 72px);
}

.hero-lead {
  max-width: 740px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
}

.hero-benefits {
  display: grid;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  gap: 13px;
}

.hero-benefits li {
  display: flex;
  align-items: center;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 650;
  gap: 12px;
}

.check {
  display: grid;
  width: 26px;
  height: 26px;
  flex: 0 0 26px;
  place-items: center;
  color: var(--white);
  background: rgba(50, 164, 119, 0.85);
  border-radius: 50%;
  font-size: 14px;
  font-weight: 900;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  margin-top: 38px;
  gap: 14px;
}

.hero-note {
  margin: 16px 0 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.hero-panel {
  position: relative;
  overflow: hidden;
  padding: 26px;
  background:
    linear-gradient(150deg, rgba(255, 255, 255, 0.13), rgba(255, 255, 255, 0.055));
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.hero-panel::after {
  position: absolute;
  top: -50px;
  right: -45px;
  width: 170px;
  height: 170px;
  content: "";
  background: radial-gradient(circle, rgba(93, 198, 216, 0.25), transparent 68%);
  border-radius: 50%;
}

.hero-panel-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-label {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel-index {
  color: rgba(255, 255, 255, 0.28);
  font-size: 34px;
  font-weight: 850;
}

.technical-illustration {
  position: relative;
  height: 260px;
  margin: 18px 0 22px;
  background:
    linear-gradient(180deg, rgba(5, 20, 37, 0.44), rgba(5, 20, 37, 0.16));
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 18px;
}

.floor-line {
  position: absolute;
  right: 24px;
  bottom: 38px;
  left: 24px;
  height: 2px;
  background: rgba(255, 255, 255, 0.24);
}

.boiler {
  position: absolute;
  bottom: 40px;
  width: 74px;
  height: 128px;
  background:
    linear-gradient(90deg, rgba(255,255,255,0.78), rgba(255,255,255,0.42));
  border: 2px solid rgba(255,255,255,0.75);
  border-radius: 10px 10px 7px 7px;
  box-shadow:
    inset 0 0 0 8px rgba(5, 20, 37, 0.12),
    0 12px 28px rgba(0, 0, 0, 0.18);
}

.boiler::before {
  position: absolute;
  top: 17px;
  left: 50%;
  width: 30px;
  height: 21px;
  content: "";
  background: rgba(7, 17, 31, 0.62);
  border-radius: 3px;
  transform: translateX(-50%);
}

.boiler::after {
  position: absolute;
  right: 13px;
  bottom: 17px;
  left: 13px;
  height: 4px;
  content: "";
  background: rgba(7, 17, 31, 0.28);
  border-radius: 4px;
  box-shadow: 0 -11px 0 rgba(7, 17, 31, 0.18);
}

.boiler-one {
  left: 34px;
}

.boiler-two {
  left: 123px;
}

.pipe {
  position: absolute;
  background: var(--orange-400);
  box-shadow: 0 0 12px rgba(255, 151, 92, 0.26);
}

.pipe-horizontal {
  top: 64px;
  right: 28px;
  left: 70px;
  height: 7px;
  border-radius: 4px;
}

.pipe-vertical-one {
  top: 64px;
  left: 70px;
  width: 7px;
  height: 54px;
}

.pipe-vertical-two {
  top: 64px;
  left: 160px;
  width: 7px;
  height: 54px;
}

.pump {
  position: absolute;
  width: 38px;
  height: 38px;
  background: var(--blue-500);
  border: 5px solid rgba(255,255,255,0.7);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(47, 139, 208, 0.18);
}

.pump::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 13px;
  height: 13px;
  content: "";
  background: var(--navy-950);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.pump-one {
  top: 47px;
  right: 110px;
}

.pump-two {
  top: 47px;
  right: 48px;
}

.gauge {
  position: absolute;
  width: 29px;
  height: 29px;
  background: var(--white);
  border: 3px solid var(--gray-300);
  border-radius: 50%;
}

.gauge::before {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2px;
  height: 9px;
  content: "";
  background: var(--orange-600);
  transform: translate(-50%, -82%) rotate(35deg);
  transform-origin: bottom center;
}

.gauge-one {
  top: 102px;
  right: 113px;
}

.gauge-two {
  top: 102px;
  right: 51px;
}

.hero-panel-list {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.hero-panel-list div {
  padding: 14px;
  background: rgba(4, 18, 34, 0.34);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 12px;
}

.hero-panel-list strong,
.hero-panel-list span {
  display: block;
}

.hero-panel-list strong {
  font-size: 14px;
}

.hero-panel-list span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 11px;
  line-height: 1.4;
}

.stats {
  position: relative;
  z-index: 3;
  margin-top: -1px;
  color: var(--white);
  background: var(--blue-700);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  min-height: 128px;
  padding: 30px 26px;
  border-right: 1px solid rgba(255, 255, 255, 0.16);
}

.stat:last-child {
  border-right: 0;
}

.stat strong,
.stat span {
  display: block;
}

.stat strong {
  font-size: 20px;
  font-weight: 850;
}

.stat span {
  margin-top: 7px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 13px;
  line-height: 1.45;
}

.section {
  padding-block: 104px;
}

.section-light {
  background: var(--white);
}

.section-dark {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 90% 10%, rgba(47, 139, 208, 0.17), transparent 24%),
    var(--navy-900);
}

.section-dark::before {
  position: absolute;
  right: 0;
  bottom: 0;
  width: 45%;
  height: 100%;
  content: "";
  opacity: 0.08;
  background-image:
    linear-gradient(rgba(255,255,255,0.45) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.45) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to left, #000, transparent);
}

.section-muted {
  background: var(--gray-50);
}

.section-accent {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 20% 100%, rgba(255, 151, 92, 0.22), transparent 25%),
    linear-gradient(130deg, var(--blue-700), var(--navy-850));
}

.section-heading {
  display: grid;
  align-items: end;
  margin-bottom: 48px;
  grid-template-columns: 1fr minmax(320px, 0.7fr);
  gap: 48px;
}

.section-heading h2,
.split-copy h2,
.request-copy h2,
.about-card h2 {
  color: var(--navy-900);
  font-size: clamp(34px, 4vw, 54px);
}

.section-heading-light h2 {
  color: var(--white);
}

.section-intro {
  margin: 0 0 4px;
  color: var(--gray-600);
  font-size: 17px;
  line-height: 1.7;
}

.section-heading-light .section-intro {
  color: rgba(255, 255, 255, 0.62);
}

.cards-grid {
  display: grid;
}

.service-grid {
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-md);
  box-shadow: 0 0 0 rgba(8, 26, 48, 0);
  transition:
    transform 0.25s ease,
    box-shadow 0.25s ease,
    border-color 0.25s ease;
}

.card:hover {
  z-index: 2;
  border-color: rgba(31, 115, 183, 0.25);
  box-shadow: var(--shadow-md);
  transform: translateY(-5px);
}

.card-number {
  position: absolute;
  top: 22px;
  right: 24px;
  color: var(--gray-200);
  font-size: 32px;
  font-weight: 900;
}

.service-icon {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  color: var(--blue-700);
  background: rgba(31, 115, 183, 0.09);
  border-radius: 15px;
}

.service-icon svg {
  width: 32px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.card h3,
.object-card h3,
.timeline h3 {
  margin: 22px 0 0;
  color: var(--navy-900);
  font-size: 21px;
  line-height: 1.28;
}

.card p,
.object-card p,
.timeline p {
  margin: 12px 0 0;
  color: var(--gray-600);
}

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

.object-card {
  min-height: 245px;
  padding: 28px;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.09), rgba(255,255,255,0.035));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  transition:
    transform 0.25s ease,
    background 0.25s ease;
}

.object-card:hover {
  background:
    linear-gradient(145deg, rgba(255,255,255,0.14), rgba(255,255,255,0.055));
  transform: translateY(-4px);
}

.object-tag {
  display: inline-flex;
  padding: 6px 10px;
  color: var(--cyan-400);
  background: rgba(93, 198, 216, 0.09);
  border: 1px solid rgba(93, 198, 216, 0.18);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 850;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.object-card h3 {
  color: var(--white);
}

.object-card p {
  color: rgba(255, 255, 255, 0.58);
}

.split-layout {
  display: grid;
  align-items: center;
  grid-template-columns: 1fr 0.9fr;
  gap: 80px;
}

.split-copy > p:not(.eyebrow) {
  max-width: 680px;
  margin: 25px 0 0;
  color: var(--gray-600);
  font-size: 17px;
}

.solution-list {
  display: grid;
  margin-top: 36px;
  gap: 4px;
}

.solution-item {
  display: grid;
  padding: 18px 0;
  border-bottom: 1px solid var(--gray-200);
  grid-template-columns: 50px 1fr;
  gap: 16px;
}

.solution-item > span {
  color: var(--blue-600);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.solution-item strong {
  color: var(--navy-900);
  font-size: 17px;
}

.solution-item p {
  margin: 5px 0 0;
  color: var(--gray-500);
  font-size: 14px;
}

.system-diagram {
  padding: 30px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.diagram-title {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.diagram-title span {
  color: var(--blue-700);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.diagram-title strong {
  max-width: 280px;
  color: var(--navy-900);
  font-size: 16px;
  text-align: right;
}

.diagram-stage {
  position: relative;
  height: 400px;
  margin-top: 26px;
  background:
    linear-gradient(rgba(21, 48, 79, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 48, 79, 0.055) 1px, transparent 1px),
    var(--white);
  background-size: 28px 28px;
  border: 1px solid var(--gray-200);
  border-radius: 18px;
}

.diagram-node {
  position: absolute;
  z-index: 2;
  display: flex;
  width: 120px;
  min-height: 80px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 12px;
  background: var(--white);
  border: 2px solid var(--blue-600);
  border-radius: 14px;
  box-shadow: 0 12px 24px rgba(8, 26, 48, 0.08);
  text-align: center;
}

.diagram-node small {
  color: var(--gray-500);
  font-size: 10px;
}

.diagram-node strong {
  margin-top: 4px;
  color: var(--navy-900);
  font-size: 14px;
}

.diagram-boiler {
  top: 38px;
  left: 50%;
  transform: translateX(-50%);
}

.diagram-separator {
  top: 161px;
  left: 50%;
  border-color: var(--orange-500);
  transform: translateX(-50%);
}

.diagram-manifold {
  top: 284px;
  left: 50%;
  border-color: var(--green-500);
  transform: translateX(-50%);
}

.diagram-line {
  position: absolute;
  z-index: 1;
  left: 50%;
  width: 4px;
  height: 43px;
  background: var(--gray-300);
  transform: translateX(-50%);
}

.line-one {
  top: 118px;
}

.line-two {
  top: 241px;
}

.diagram-branches {
  position: absolute;
  right: 12px;
  bottom: 20px;
  left: 12px;
  display: flex;
  justify-content: space-between;
}

.branch {
  display: flex;
  width: 28%;
  flex-direction: column;
  align-items: center;
  color: var(--gray-600);
  font-size: 11px;
  text-align: center;
}

.branch span {
  width: 44px;
  height: 7px;
  margin-bottom: 7px;
  background: var(--blue-500);
  border-radius: 999px;
}

.branch-two span {
  background: var(--orange-500);
}

.branch-three span {
  background: var(--green-500);
}

.system-diagram > p {
  margin: 18px 0 0;
  color: var(--gray-500);
  font-size: 12px;
}

.request-grid {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: start;
  grid-template-columns: 0.83fr 1.17fr;
  gap: 72px;
}

.request-copy {
  padding-top: 24px;
}

.request-copy h2 {
  color: var(--white);
}

.request-copy > p:not(.eyebrow) {
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 17px;
}

.request-points {
  display: grid;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
  gap: 12px;
}

.request-points li {
  position: relative;
  padding-left: 28px;
  color: rgba(255, 255, 255, 0.85);
}

.request-points li::before {
  position: absolute;
  top: 8px;
  left: 0;
  width: 9px;
  height: 9px;
  content: "";
  background: var(--orange-400);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(255, 151, 92, 0.14);
}

.direct-contact {
  margin-top: 38px;
  padding: 20px 22px;
  background: rgba(5, 20, 37, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 14px;
}

.direct-contact span,
.direct-contact a {
  display: block;
}

.direct-contact span {
  color: rgba(255, 255, 255, 0.58);
  font-size: 12px;
}

.direct-contact a {
  margin-top: 5px;
  color: var(--white);
  font-size: 22px;
  font-weight: 850;
}

.request-form {
  padding: 34px;
  color: var(--gray-800);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.form-heading {
  margin-bottom: 26px;
}

.form-heading strong,
.form-heading span {
  display: block;
}

.form-heading strong {
  color: var(--navy-900);
  font-size: 30px;
  letter-spacing: -0.02em;
}

.form-heading span {
  margin-top: 6px;
  color: var(--gray-500);
  font-size: 14px;
}

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

.field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.field-full {
  grid-column: 1 / -1;
}

.field > span {
  color: var(--gray-700);
  font-size: 12px;
  font-weight: 800;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  color: var(--navy-900);
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  outline: none;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.field input,
.field select {
  height: 50px;
  padding: 0 14px;
}

.field textarea {
  min-height: 118px;
  padding: 13px 14px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  background: var(--white);
  border-color: var(--blue-500);
  box-shadow: 0 0 0 4px rgba(47, 139, 208, 0.1);
}

.field input::placeholder,
.field textarea::placeholder {
  color: #99a5b1;
}

.file-field input {
  height: auto;
  padding: 12px;
}

.file-field small {
  color: var(--gray-500);
  font-size: 11px;
}

.consent {
  display: grid;
  align-items: start;
  margin: 20px 0;
  color: var(--gray-500);
  font-size: 11px;
  line-height: 1.5;
  grid-template-columns: 18px 1fr;
  gap: 10px;
}

.consent input {
  width: 16px;
  height: 16px;
  margin: 2px 0 0;
  accent-color: var(--blue-700);
}

.consent a {
  color: var(--blue-700);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-note {
  margin: 13px 0 0;
  color: var(--gray-500);
  font-size: 10px;
  text-align: center;
}

.timeline {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}

.timeline li {
  position: relative;
  min-height: 255px;
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--gray-200);
}

.timeline li:nth-child(1) {
  border-radius: var(--radius-md) 0 0 0;
}

.timeline li:nth-child(3) {
  border-radius: 0 var(--radius-md) 0 0;
}

.timeline li:nth-child(4) {
  border-radius: 0 0 0 var(--radius-md);
}

.timeline li:nth-child(6) {
  border-radius: 0 0 var(--radius-md) 0;
}

.timeline li:not(:nth-child(3n)) {
  border-right: 0;
}

.timeline li:nth-child(n+4) {
  border-top: 0;
}

.timeline-number {
  display: inline-flex;
  color: var(--orange-600);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.timeline h3 {
  margin-top: 36px;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 26px;
}

.about-card {
  padding: 46px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.about-card > p:not(.eyebrow) {
  margin: 22px 0 0;
  color: var(--gray-600);
  font-size: 16px;
}

.about-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin-top: 32px;
  gap: 22px;
}

.text-link {
  color: var(--blue-700);
  font-size: 14px;
  font-weight: 800;
}

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

.trust-item {
  display: grid;
  align-items: start;
  padding: 24px;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  grid-template-columns: 52px 1fr;
  gap: 16px;
}

.trust-item > span {
  color: var(--blue-600);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.trust-item strong {
  color: var(--navy-900);
  font-size: 17px;
}

.trust-item p {
  margin: 6px 0 0;
  color: var(--gray-500);
  font-size: 13px;
}

.faq {
  border-top: 1px solid var(--gray-200);
}

.faq details {
  border-bottom: 1px solid var(--gray-200);
}

.faq summary {
  position: relative;
  padding: 24px 54px 24px 0;
  color: var(--navy-900);
  cursor: pointer;
  font-size: 18px;
  font-weight: 800;
  list-style: none;
}

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

.faq summary::before,
.faq summary::after {
  position: absolute;
  top: 50%;
  right: 8px;
  width: 18px;
  height: 2px;
  content: "";
  background: var(--blue-700);
  transform: translateY(-50%);
  transition: transform 0.2s ease;
}

.faq summary::after {
  transform: translateY(-50%) rotate(90deg);
}

.faq details[open] summary::after {
  transform: translateY(-50%) rotate(0);
}

.faq details p {
  max-width: 850px;
  margin: -7px 0 26px;
  color: var(--gray-600);
}

.contact-strip {
  padding-block: 56px;
  color: var(--white);
  background: var(--orange-600);
}

.contact-strip-inner {
  display: grid;
  align-items: center;
  grid-template-columns: 1fr 1.1fr auto;
  gap: 40px;
}

.contact-strip .eyebrow {
  margin-bottom: 9px;
  color: rgba(255, 255, 255, 0.72);
}

.contact-strip h2 {
  max-width: 430px;
  font-size: clamp(28px, 3.4vw, 42px);
}

.contact-options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.contact-option {
  padding: 17px 18px;
  background: rgba(255, 255, 255, 0.09);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 12px;
  transition: background 0.2s ease;
}

.contact-option:hover {
  background: rgba(255, 255, 255, 0.15);
}

.contact-option span,
.contact-option strong {
  display: block;
}

.contact-option span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact-option strong {
  margin-top: 5px;
  font-size: 15px;
}

.site-footer {
  color: rgba(255, 255, 255, 0.68);
  background: var(--navy-950);
}

.footer-grid {
  display: grid;
  padding-block: 64px 48px;
  grid-template-columns: 1.35fr 0.75fr 0.8fr 1fr;
  gap: 48px;
}

.brand-footer .brand-text strong {
  color: var(--white);
}

.brand-footer .brand-text small {
  color: rgba(255, 255, 255, 0.46);
}

.footer-description {
  max-width: 300px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 13px;
}

.footer-title {
  display: block;
  margin-bottom: 16px;
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.footer-nav,
.footer-contacts {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-nav a,
.footer-contacts a {
  transition: color 0.2s ease;
}

.footer-nav a:hover,
.footer-contacts a:hover {
  color: var(--white);
}

.footer-nav a,
.footer-contacts {
  font-size: 13px;
}

.footer-bottom {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.38);
  font-size: 11px;
  gap: 30px;
}

.mobile-contact-bar {
  display: none;
}

@media (max-width: 1120px) {
  .main-nav {
    gap: 16px;
  }

  .header-contact {
    display: none;
  }

  .hero-inner {
    grid-template-columns: 1fr 420px;
    gap: 42px;
  }

  .contact-strip-inner {
    grid-template-columns: 1fr 1fr;
  }

  .contact-strip-inner > .button {
    justify-self: start;
  }
}

@media (max-width: 960px) {
  :root {
    --header-height: 74px;
  }

  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .header-inner {
    min-height: var(--header-height);
  }

  .nav-toggle {
    position: absolute;
    opacity: 0;
    pointer-events: none;
  }

  .nav-toggle-label {
    display: flex;
    width: 44px;
    height: 44px;
    margin-left: auto;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    gap: 5px;
  }

  .nav-toggle-label span {
    width: 23px;
    height: 2px;
    background: var(--navy-900);
    border-radius: 5px;
    transition:
      transform 0.2s ease,
      opacity 0.2s ease;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: none;
    margin: 0;
    padding: 18px 16px 24px;
    align-items: stretch;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-md);
    flex-direction: column;
    gap: 0;
  }

  .main-nav a {
    padding: 13px 10px;
    border-bottom: 1px solid var(--gray-100);
  }

  .main-nav a::after {
    display: none;
  }

  .nav-toggle:checked ~ .main-nav {
    display: flex;
  }

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

  .nav-toggle:checked + .nav-toggle-label span:nth-child(2) {
    opacity: 0;
  }

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

  .header-button {
    display: none;
  }

  .hero-inner {
    min-height: auto;
    padding-block: 70px;
    grid-template-columns: 1fr;
  }

  .hero-content {
    max-width: 800px;
  }

  .hero-panel {
    width: min(100%, 580px);
  }

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

  .stat:nth-child(2) {
    border-right: 0;
  }

  .stat:nth-child(-n+2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  }

  .section {
    padding-block: 82px;
  }

  .section-heading {
    align-items: start;
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .section-intro {
    max-width: 720px;
  }

  .service-grid,
  .object-grid {
    grid-template-columns: 1fr 1fr;
  }

  .split-layout {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .system-diagram {
    max-width: 640px;
  }

  .request-grid {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .request-copy {
    max-width: 720px;
  }

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

  .timeline li:nth-child(1),
  .timeline li:nth-child(3),
  .timeline li:nth-child(4),
  .timeline li:nth-child(6) {
    border-radius: 0;
  }

  .timeline li:nth-child(1) {
    border-radius: var(--radius-md) 0 0 0;
  }

  .timeline li:nth-child(2) {
    border-radius: 0 var(--radius-md) 0 0;
  }

  .timeline li:nth-child(5) {
    border-radius: 0 0 0 var(--radius-md);
  }

  .timeline li:nth-child(6) {
    border-radius: 0 0 var(--radius-md) 0;
  }

  .timeline li:not(:nth-child(3n)) {
    border-right: 1px solid var(--gray-200);
  }

  .timeline li:nth-child(odd) {
    border-right: 0;
  }

  .timeline li:nth-child(n+3) {
    border-top: 0;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .contact-strip-inner {
    grid-template-columns: 1fr;
  }

  .contact-options {
    max-width: 720px;
  }

  .footer-grid {
    grid-template-columns: 1.2fr 1fr 1fr;
  }

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }
}

@media (max-width: 680px) {
  body {
    padding-bottom: 62px;
  }

  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  .brand-text strong {
    font-size: 13px;
  }

  .brand-text small {
    font-size: 10px;
  }

  .hero::before {
    width: 340px;
    height: 340px;
  }

  .hero-inner {
    padding-block: 54px 64px;
    gap: 42px;
  }

  .hero h1 {
    font-size: clamp(36px, 11vw, 50px);
  }

  .hero-lead {
    font-size: 17px;
  }

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

  .hero-actions .button {
    width: 100%;
  }

  .hero-panel {
    padding: 18px;
    border-radius: 22px;
  }

  .technical-illustration {
    height: 225px;
  }

  .boiler {
    width: 62px;
    height: 110px;
  }

  .boiler-one {
    left: 21px;
  }

  .boiler-two {
    left: 96px;
  }

  .pipe-horizontal {
    left: 55px;
  }

  .pipe-vertical-one {
    left: 55px;
  }

  .pipe-vertical-two {
    left: 131px;
  }

  .hero-panel-list {
    grid-template-columns: 1fr;
  }

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

  .stat {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  }

  .stat:last-child {
    border-bottom: 0;
  }

  .section {
    padding-block: 68px;
  }

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

  .section-heading h2,
  .split-copy h2,
  .request-copy h2,
  .about-card h2 {
    font-size: 34px;
  }

  .service-grid,
  .object-grid {
    grid-template-columns: 1fr;
  }

  .object-card {
    min-height: 0;
  }

  .system-diagram {
    padding: 18px;
  }

  .diagram-title {
    flex-direction: column;
    gap: 5px;
  }

  .diagram-title strong {
    text-align: left;
  }

  .diagram-stage {
    height: 390px;
  }

  .diagram-node {
    width: 104px;
  }

  .request-form {
    padding: 24px 18px;
    border-radius: 22px;
  }

  .form-heading strong {
    font-size: 26px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .field-full {
    grid-column: auto;
  }

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

  .timeline li {
    min-height: 0;
    border-right: 1px solid var(--gray-200) !important;
    border-bottom: 0;
    border-radius: 0 !important;
  }

  .timeline li:first-child {
    border-radius: var(--radius-md) var(--radius-md) 0 0 !important;
  }

  .timeline li:last-child {
    border-bottom: 1px solid var(--gray-200);
    border-radius: 0 0 var(--radius-md) var(--radius-md) !important;
  }

  .timeline h3 {
    margin-top: 20px;
  }

  .about-card {
    padding: 28px 22px;
  }

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

  .trust-item {
    grid-template-columns: 40px 1fr;
  }

  .faq summary {
    font-size: 16px;
  }

  .contact-options {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    padding-block: 50px 34px;
    grid-template-columns: 1fr 1fr;
    gap: 38px 22px;
  }

  .footer-grid > div:first-child {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    padding-block: 20px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
  }

  .mobile-contact-bar {
    position: fixed;
    z-index: 1200;
    right: 0;
    bottom: 0;
    left: 0;
    display: grid;
    min-height: 62px;
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    box-shadow: 0 -10px 30px rgba(8, 26, 48, 0.12);
    grid-template-columns: 0.85fr 1.15fr;
  }

  .mobile-contact-bar a {
    display: grid;
    place-items: center;
    color: var(--navy-900);
    font-size: 14px;
    font-weight: 850;
  }

  .mobile-contact-bar a:last-child {
    color: var(--white);
    background: var(--orange-600);
  }
}

@media (max-width: 420px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid > div:first-child {
    grid-column: auto;
  }
}

@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;
  }
}


/* Скрытое поле-ловушка для автоматического спама */
.website-field {
  position: absolute !important;
  left: -10000px !important;
  width: 1px !important;
  height: 1px !important;
  overflow: hidden !important;
  opacity: 0 !important;
  pointer-events: none !important;
}