:root {
  --ink: #101b26;
  --navy: #102d44;
  --navy-hover: #173d59;
  --navy-muted: #315068;
  --steel: #6d7f8d;
  --steel-light: #b6c1c9;
  --pale: #e3e9ed;
  --paper: #f7f7f2;
  --white: #ffffff;
  --orange: #d86d1d;
  --orange-hover: #b95715;
  --line: #cbd3d8;
  --line-dark: rgba(255, 255, 255, 0.14);
  --content-width: 1520px;
  --content-gutter: clamp(24px, 5vw, 96px);
  --focus: #f39a55;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

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

h1,
h2,
h3 {
  font-family: "Golos Text", Arial, sans-serif;
  text-wrap: balance;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 12px 18px;
  color: var(--white);
  background: var(--navy);
  transform: translateY(-150%);
}

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

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

.mono {
  font-family: "JetBrains Mono", Consolas, monospace;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

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

.eyebrow {
  margin-bottom: 0;
  color: var(--orange);
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.115em;
  text-transform: uppercase;
}

.button {
  display: inline-flex;
  min-height: 52px;
  padding: 0 27px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.035em;
  text-align: center;
  text-transform: uppercase;
  transition: color 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

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

.button-navy:hover {
  background: var(--navy-hover);
}

.button-orange {
  color: var(--white);
  background: var(--orange);
}

.button-orange:hover {
  background: var(--orange-hover);
}

.site-header {
  position: relative;
  z-index: 10;
  color: var(--ink);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(calc(100% - (var(--content-gutter) * 2)), var(--content-width));
  min-height: 128px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 25px;
}

.logo-plate {
  width: 180px;
  height: 98px;
  padding: 13px 17px;
  flex: 0 0 auto;
  display: flex;
  background: var(--navy);
}

.logo-plate img,
.footer-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.header-spacer {
  flex: 1;
}

.header-contact,
.footer-contacts {
  margin: 0;
  display: flex;
  flex-direction: column;
  font-style: normal;
}

.header-contact {
  color: var(--steel);
  font-size: 14px;
  line-height: 1.65;
}

.header-contact a:hover,
.footer-contacts a:hover {
  color: var(--orange);
}

.header-button {
  min-width: 205px;
}

.hero {
  min-height: 660px;
  display: grid;
  grid-template-columns: minmax(200px, 13.5vw) minmax(480px, 1fr) minmax(520px, 37vw);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.hero-rail {
  min-width: 0;
  padding: 56px 36px 48px var(--content-gutter);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  color: var(--white);
  background: var(--orange);
}

.rail-number {
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: clamp(70px, 6.7vw, 112px);
  font-weight: 500;
  line-height: 0.9;
  letter-spacing: -0.09em;
}

.rail-label {
  font-size: 11px;
  line-height: 2.2;
}

.hero-copy {
  min-width: 0;
  padding: clamp(78px, 6.8vw, 128px) clamp(44px, 4vw, 72px) 64px;
  align-self: stretch;
}

.hero-copy h1 {
  max-width: 760px;
  margin: 24px 0 25px;
  font-size: clamp(52px, 4.15vw, 78px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.hero-lead {
  max-width: 650px;
  margin-bottom: 34px;
  color: var(--steel);
  font-size: clamp(16px, 1vw, 18px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.technical-visual {
  position: relative;
  min-width: 0;
  min-height: 660px;
  overflow: hidden;
  color: var(--navy);
  background-color: var(--pale);
  background-image:
    linear-gradient(rgba(16, 45, 68, 0.1) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 45, 68, 0.1) 1px, transparent 1px);
  background-size: 58px 58px;
  border-left: 1px solid var(--line);
}

.visual-label {
  position: absolute;
  top: 36px;
  left: 42px;
  margin: 0;
  color: var(--steel);
  font-size: 10px;
}

.scheme-art {
  position: absolute;
  inset: 70px 46px 116px;
  display: grid;
  place-items: center;
}

.scheme-art svg {
  width: min(100%, 580px);
  height: auto;
}

.scheme-paper {
  fill: var(--paper);
}

.scheme-fill {
  fill: var(--navy);
}

.scheme-accent {
  stroke: var(--orange);
}

.operating-point {
  position: absolute;
  right: 42px;
  bottom: 42px;
  left: 42px;
  min-height: 96px;
  padding: 20px 25px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  color: var(--white);
  background: var(--navy);
  border-left: 6px solid var(--orange);
}

.operating-label {
  display: block;
  margin-bottom: 4px;
  color: var(--steel-light);
  font-size: 10px;
}

.operating-point strong {
  font-family: "Golos Text", Arial, sans-serif;
  font-size: clamp(24px, 2vw, 34px);
  line-height: 1;
}

.operating-data {
  color: var(--pale);
  font-size: 11px;
  white-space: nowrap;
}

.dark-section {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--navy);
}

.status-section {
  min-height: 470px;
  display: flex;
  align-items: center;
}

.status-marker {
  position: absolute;
  inset: 0 auto 0 0;
  width: 14px;
  background: var(--orange);
}

.status-content {
  position: relative;
  padding-block: 82px;
}

.status-content h2 {
  max-width: 1000px;
  margin: 25px 0;
  font-size: clamp(48px, 4.7vw, 80px);
  line-height: 1.06;
  letter-spacing: -0.04em;
}

.status-content > p:last-of-type {
  max-width: 840px;
  margin-bottom: 0;
  color: var(--steel-light);
  font-size: 17px;
  line-height: 1.65;
}

.status-index {
  position: absolute;
  right: 0;
  top: 38px;
  color: rgba(255, 255, 255, 0.08);
  font-family: "JetBrains Mono", Consolas, monospace;
  font-size: clamp(124px, 13vw, 226px);
  line-height: 1;
  letter-spacing: -0.08em;
  pointer-events: none;
}

.section {
  padding-block: clamp(68px, 6.2vw, 108px);
}

.price-section,
.request-section {
  background: var(--paper);
}

.section-heading {
  margin-bottom: 40px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 600px);
  align-items: end;
  gap: 52px;
}

.section-title-block h2,
.documents-section h2 {
  margin: 17px 0 0;
  font-size: clamp(36px, 3.1vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.section-note {
  margin-bottom: 0;
  color: var(--steel);
  font-size: 14px;
  line-height: 1.7;
}

.section-note strong {
  color: var(--ink);
}

.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line);
  scrollbar-color: var(--orange) var(--pale);
}

table {
  width: 100%;
  min-width: 960px;
  border-collapse: collapse;
  background: var(--white);
}

thead th {
  padding: 18px 24px;
  color: var(--steel);
  background: var(--pale);
  border-bottom: 1px solid var(--line);
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-align: left;
  text-transform: uppercase;
}

th,
td {
  vertical-align: top;
}

tbody td {
  padding: 19px 22px;
  border-bottom: 1px solid var(--line);
}

tbody tr:last-child td {
  border-bottom: 0;
}

.align-right,
.price-cell {
  text-align: right;
}

.table-group th {
  padding: 13px 24px 13px 21px;
  color: var(--navy-muted);
  background: var(--pale);
  border-bottom: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-align: left;
  text-transform: uppercase;
}

.product-name {
  width: 52%;
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
}

.replacement {
  display: block;
  margin-top: 7px;
  color: var(--steel);
  font-family: Inter, Arial, sans-serif;
  font-size: 13px;
  font-weight: 400;
}

.product-code {
  color: var(--navy-muted);
  font-size: 12px;
  font-weight: 500;
  text-transform: none;
}

.specification {
  width: 30%;
  color: var(--steel);
  font-size: 14px;
}

.price-cell {
  width: 18%;
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 18px;
  font-weight: 700;
  white-space: nowrap;
}

.documents-section {
  padding-block: clamp(70px, 6.2vw, 108px);
}

.documents-section h2 {
  max-width: 980px;
}

.documents-lead {
  max-width: 880px;
  margin: 26px 0 0;
  color: var(--steel-light);
  font-size: 16px;
  line-height: 1.7;
}

.document-grid {
  margin-top: 42px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.document-grid article {
  min-height: 280px;
  padding: 27px 25px 29px;
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
}

.card-number {
  display: block;
  margin-bottom: 34px;
  color: var(--orange);
  font-size: 44px;
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.06em;
}

.document-grid h3,
.request-grid h3 {
  margin: 0 0 16px;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.document-grid p {
  margin-bottom: 0;
  color: var(--steel-light);
  font-size: 14px;
  line-height: 1.65;
}

.request-heading {
  grid-template-columns: 1fr;
}

.request-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.request-grid article {
  min-height: 360px;
  padding: clamp(32px, 3.6vw, 56px);
  display: flex;
  flex-direction: column;
  background: var(--white);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.request-grid h3 {
  margin-top: 22px;
  font-size: clamp(25px, 2.2vw, 36px);
}

.request-grid article > p:not(.eyebrow) {
  max-width: 680px;
  margin-bottom: 32px;
  color: var(--steel);
  line-height: 1.7;
}

.request-grid .button {
  margin-top: auto;
  align-self: flex-start;
}

.site-footer {
  padding-block: 64px 38px;
  color: var(--ink);
  background: var(--pale);
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.8fr;
  gap: 60px;
  align-items: start;
}

.footer-logo {
  width: 205px;
  height: 128px;
  padding: 17px 20px;
  display: block;
  background: var(--navy);
}

.footer-brand > p {
  margin: 20px 0 0;
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 19px;
  font-weight: 700;
}

.footer-label {
  margin: 11px 0 20px;
  color: var(--orange);
  font-family: "Golos Text", Arial, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.105em;
  text-transform: uppercase;
}

.footer-request .button {
  min-width: 280px;
}

.footer-contacts {
  gap: 7px;
  font-size: 16px;
}

.footer-contacts .footer-label {
  margin-top: 8px;
  margin-bottom: 12px;
}

.footer-legal {
  margin-top: 54px;
  padding-top: 25px;
  color: var(--steel);
  border-top: 1px solid var(--line);
  font-size: 12px;
  line-height: 1.7;
}

.footer-legal p {
  max-width: 1260px;
  margin-bottom: 12px;
}

.footer-legal p:last-child {
  margin-bottom: 0;
}

#price,
#request {
  scroll-margin-top: 24px;
}

@media (max-width: 1540px) {
  :root {
    --content-gutter: clamp(44px, 4vw, 64px);
  }

  .hero {
    grid-template-columns: 200px minmax(470px, 1fr) minmax(460px, 36vw);
  }

  .hero-copy {
    padding-inline: 52px;
  }
}

@media (max-width: 1220px) {
  :root {
    --content-gutter: 36px;
  }

  .header-inner {
    min-height: 110px;
  }

  .logo-plate {
    width: 154px;
    height: 84px;
  }

  .hero {
    min-height: auto;
    grid-template-columns: 120px minmax(0, 1fr);
  }

  .hero-rail {
    min-height: 510px;
    padding: 42px 26px 36px 36px;
  }

  .rail-number {
    font-size: 66px;
  }

  .hero-copy {
    min-height: 510px;
    padding: 80px 56px 58px;
  }

  .technical-visual {
    grid-column: 1 / -1;
    min-height: 490px;
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .scheme-art {
    inset: 54px 88px 96px;
  }

  .operating-point {
    left: auto;
    width: min(610px, calc(100% - 80px));
  }

  .section-heading {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 26px;
  }

  .section-note {
    max-width: 820px;
  }

  .document-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .footer-contacts {
    grid-column: 2;
    grid-row: 1;
  }

  .footer-request {
    grid-column: 1 / -1;
  }
}

@media (max-width: 780px) {
  :root {
    --content-gutter: 22px;
  }

  .header-inner {
    min-height: 92px;
    gap: 18px;
  }

  .logo-plate {
    width: 122px;
    height: 68px;
    padding: 10px 13px;
  }

  .header-contact {
    margin-left: auto;
    font-size: 13px;
  }

  .header-button {
    display: none;
  }

  .hero {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .hero-rail {
    min-height: 510px;
    padding: 34px 14px 30px;
    align-items: center;
  }

  .rail-number {
    font-size: 46px;
  }

  .rail-label {
    font-size: 8px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
  }

  .hero-copy {
    min-height: 510px;
    padding: 58px 26px 48px;
  }

  .hero-copy h1 {
    font-size: clamp(42px, 10vw, 62px);
  }

  .hero-lead {
    font-size: 16px;
  }

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

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

  .technical-visual {
    min-height: 440px;
  }

  .scheme-art {
    inset: 54px 24px 112px;
  }

  .visual-label {
    top: 22px;
    left: 24px;
  }

  .operating-point {
    right: 24px;
    bottom: 24px;
    left: 24px;
    width: auto;
  }

  .status-marker {
    width: 8px;
  }

  .status-content {
    padding-block: 66px;
  }

  .status-content h2 {
    font-size: clamp(42px, 11vw, 64px);
  }

  .status-content > p:last-of-type {
    font-size: 16px;
  }

  .status-index {
    top: 28px;
  }

  .document-grid,
  .request-grid {
    grid-template-columns: 1fr;
  }

  .document-grid article {
    min-height: 0;
  }

  .card-number {
    margin-bottom: 32px;
  }

  .request-grid article {
    min-height: 320px;
  }

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

  .footer-contacts,
  .footer-request {
    grid-column: auto;
    grid-row: auto;
  }
}

@media (max-width: 620px) {
  .header-inner {
    min-height: 86px;
  }

  .logo-plate {
    width: 112px;
    height: 64px;
  }

  .header-contact a:first-child {
    font-size: 14px;
    font-weight: 600;
  }

  .header-contact a:last-child {
    display: none;
  }

  .hero-copy {
    padding-inline: 22px;
  }

  .hero-copy h1 {
    margin-block: 21px 22px;
  }

  .button {
    min-height: 54px;
    padding-inline: 20px;
  }

  .operating-point {
    min-height: 112px;
    padding: 20px;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .operating-data {
    white-space: normal;
  }

  .section-title-block h2,
  .documents-section h2 {
    font-size: clamp(34px, 9vw, 48px);
  }

  .table-scroll {
    overflow: visible;
    border: 0;
  }

  table,
  thead,
  tbody,
  th,
  td,
  tr {
    display: block;
  }

  table {
    min-width: 0;
    background: transparent;
  }

  thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  tbody tr:not(.table-group) {
    margin-bottom: 12px;
    background: var(--white);
    border: 1px solid var(--line);
  }

  tbody td,
  .product-name,
  .specification,
  .price-cell {
    width: 100%;
    padding: 17px 18px 17px 132px;
    position: relative;
    text-align: left;
    border-bottom: 1px solid var(--line);
  }

  tbody td::before {
    content: attr(data-label);
    position: absolute;
    top: 18px;
    left: 18px;
    width: 96px;
    color: var(--steel);
    font-family: "Golos Text", Arial, sans-serif;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  tbody tr:not(.table-group) td:last-child {
    border-bottom: 0;
  }

  .table-group {
    margin: 28px 0 12px;
  }

  .table-group:first-child {
    margin-top: 0;
  }

  .table-group th {
    padding: 14px 18px;
  }

  .footer-logo {
    width: 190px;
    height: 118px;
  }

  .footer-request .button {
    width: 100%;
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

@media print {
  .site-header,
  .hero-rail,
  .hero-actions,
  .request-section,
  .site-footer {
    display: none;
  }

  body,
  .price-section,
  .dark-section {
    color: #000;
    background: #fff;
  }

  .technical-visual,
  .dark-section,
  .table-scroll,
  table,
  tr,
  td,
  th {
    break-inside: avoid;
  }
}