:root {
  --bg-primary: #F5F7FA;
  --text-primary: #1E293B;
  --text-secondary: #64748B;
  --accent: #0F4C81;
  --accent-hover: #0D3E6B;
  --border: #CBD5E1;
  --success: #16A34A;
  --error: #DC2626;
  --white: #FFFFFF;
  --font-main: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent-hover);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; margin-bottom: 1rem; }
h2 { font-size: 2rem; margin-bottom: 0.75rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; }

p { margin-bottom: 1rem; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 500;
  border: none;
  border-radius: 0;
  cursor: pointer;
  transition: background-color 0.2s;
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: var(--white);
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-secondary:hover {
  background-color: var(--accent);
  color: var(--white);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-download svg {
  width: 18px;
  height: 18px;
}

/* Header */
.header {
  background-color: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.logo svg {
  width: 40px;
  height: 40px;
  fill: var(--accent);
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  color: var(--text-primary);
  font-weight: 500;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.2s;
}

.nav a:hover::after,
.nav a.active::after {
  width: 100%;
}

.header__contacts {
  display: flex;
  align-items: center;
  gap: 20px;
}

.header__phone {
  font-weight: 600;
  color: var(--text-primary);
}

.header__callback {
  font-size: 0.875rem;
  color: var(--accent);
}

/* Hero Section */
.hero {
  background-color: var(--white);
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero__content h1 {
  font-size: 2.75rem;
  margin-bottom: 24px;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.6;
}

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__image {
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  padding: 40px;
}

.hero__image svg {
  width: 100%;
  max-width: 400px;
  height: auto;
}

/* Advantages Section */
.advantages {
  padding: 80px 0;
}

.advantages h2 {
  text-align: center;
  margin-bottom: 48px;
}

.advantages__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.advantage-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 32px;
  text-align: center;
}

.advantage-card__icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
}

.advantage-card__icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--accent);
  fill: none;
}

.advantage-card h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.advantage-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Comparison Section */
.comparison {
  padding: 80px 0;
  background-color: var(--white);
}

.comparison h2 {
  text-align: center;
  margin-bottom: 48px;
}

.table-wrapper {
  overflow-x: auto;
  border: 1px solid var(--border);
}

.table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

.table th,
.table td {
  padding: 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.table th {
  background-color: var(--bg-primary);
  font-weight: 600;
  font-family: var(--font-main);
}

.table tr:nth-child(even) {
  background-color: var(--bg-primary);
}

.table tr:hover {
  background-color: #EBF0F6;
}

.table .price {
  font-weight: 600;
  color: var(--accent);
}

.table__actions {
  display: flex;
  gap: 12px;
}

.table__actions .btn {
  padding: 8px 16px;
  font-size: 0.875rem;
}

/* Industries Section */
.industries {
  padding: 80px 0;
}

.industries h2 {
  text-align: center;
  margin-bottom: 48px;
}

.industries__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.industry-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 32px;
}

.industry-card__icon {
  width: 40px;
  height: 40px;
  margin-bottom: 16px;
}

.industry-card__icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--accent);
  fill: none;
}

.industry-card h3 {
  font-size: 1.125rem;
  margin-bottom: 12px;
}

.industry-card p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Lead Form Section */
.lead-form {
  padding: 80px 0;
  background-color: var(--white);
}

.lead-form h2 {
  text-align: center;
  margin-bottom: 16px;
}

.lead-form__subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 48px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

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

.form-group.full-width {
  grid-column: 1 / -1;
}

.form-group label {
  font-weight: 500;
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 16px;
  border: 1px solid var(--border);
  font-family: var(--font-main);
  font-size: 1rem;
  background-color: var(--white);
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.form-checkbox input {
  width: 20px;
  height: 20px;
  margin-top: 2px;
}

.form-checkbox label {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.form-submit {
  text-align: center;
  margin-top: 32px;
}

.form-submit .btn {
  min-width: 200px;
}

/* SEO Text Section */
.seo-text {
  padding: 80px 0;
}

.seo-text__content {
  max-width: 800px;
  margin: 0 auto;
}

.seo-text h2 {
  margin-bottom: 24px;
}

.seo-text p {
  color: var(--text-secondary);
}

/* Footer */
.footer {
  background-color: var(--text-primary);
  color: var(--white);
  padding: 60px 0 30px;
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer__about .logo {
  color: var(--white);
  margin-bottom: 16px;
}

.footer__about p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

.footer__nav h4 {
  color: var(--white);
  font-size: 1rem;
  margin-bottom: 20px;
}

.footer__nav ul {
  list-style: none;
}

.footer__nav li {
  margin-bottom: 12px;
}

.footer__nav a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.footer__nav a:hover {
  color: var(--white);
}

.footer__contacts p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.footer__contacts a {
  color: var(--white);
}

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__bottom p {
  color: var(--text-secondary);
  font-size: 0.75rem;
  margin-bottom: 0;
}

/* Page Header */
.page-header {
  background-color: var(--white);
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.page-header h1 {
  margin-bottom: 8px;
}

.page-header p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Breadcrumbs */
.breadcrumbs {
  padding: 16px 0;
}

.breadcrumbs__list {
  display: flex;
  gap: 8px;
  list-style: none;
  font-size: 0.875rem;
}

.breadcrumbs__list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs__list li::after {
  content: '›';
  color: var(--text-secondary);
}

.breadcrumbs__list li:last-child::after {
  display: none;
}

.breadcrumbs__list a {
  color: var(--text-secondary);
}

.breadcrumbs__list a:hover {
  color: var(--accent);
}

.breadcrumbs__list span {
  color: var(--text-primary);
}

/* Product Card Page */
.product-hero {
  padding: 60px 0;
}

.product-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: start;
}

.product-hero__image {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-hero__image svg {
  width: 100%;
  max-width: 300px;
  height: auto;
}

.product-hero__info h1 {
  margin-bottom: 8px;
}

.product-hero__status {
  display: inline-block;
  padding: 4px 12px;
  background-color: var(--success);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.product-hero__desc {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* Product Parameters */
.product-params {
  padding: 60px 0;
  background-color: var(--white);
}

.product-params h2 {
  margin-bottom: 32px;
}

.params-table {
  max-width: 800px;
}

.params-table .table {
  font-size: 0.875rem;
}

.params-table .table th {
  width: 40%;
}

/* Connection Scheme */
.connection-scheme {
  padding: 60px 0;
}

.connection-scheme h2 {
  margin-bottom: 32px;
}

.scheme-container {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 40px;
  display: flex;
  justify-content: center;
}

.scheme-container svg {
  max-width: 100%;
  height: auto;
}

/* Documentation */
.documentation {
  padding: 60px 0;
  background-color: var(--white);
}

.documentation h2 {
  margin-bottom: 32px;
}

.docs-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.doc-card {
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  padding: 24px;
  text-align: center;
}

.doc-card__icon {
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
}

.doc-card__icon svg {
  width: 100%;
  height: 100%;
  stroke: var(--accent);
  fill: none;
}

.doc-card h4 {
  font-size: 0.875rem;
  margin-bottom: 8px;
}

.doc-card .btn {
  width: 100%;
  padding: 8px 16px;
  font-size: 0.75rem;
}

/* Order Block */
.order-block {
  padding: 60px 0;
  background-color: var(--white);
}

.order-block h2 {
  margin-bottom: 32px;
}

.order-form {
  max-width: 600px;
  margin: 0 auto;
}

.order-form .form-checkbox {
  margin-bottom: 24px;
}

/* About Page */
.about-hero {
  padding: 60px 0;
}

.about-hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-hero__text p {
  color: var(--text-secondary);
}

/* Timeline */
.timeline {
  padding: 60px 0;
  background-color: var(--white);
}

.timeline h2 {
  margin-bottom: 48px;
}

.timeline__items {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline__items::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: var(--border);
}

.timeline__item {
  display: flex;
  justify-content: flex-end;
  padding-right: calc(50% + 30px);
  position: relative;
  margin-bottom: 40px;
}

.timeline__item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: calc(50% + 30px);
}

.timeline__item::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  width: 16px;
  height: 16px;
  background-color: var(--accent);
  border-radius: 50%;
  transform: translateX(-50%);
}

.timeline__content {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 24px;
  max-width: 400px;
}

.timeline__year {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.timeline__content h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.timeline__content p {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Certificates */
.certificates {
  padding: 60px 0;
}

.certificates h2 {
  margin-bottom: 48px;
  text-align: center;
}

.certificates__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.cert-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 24px;
  text-align: center;
}

.cert-card__image {
  background-color: var(--bg-primary);
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.cert-card__image svg {
  width: 60px;
  height: 60px;
  stroke: var(--text-secondary);
  fill: none;
}

.cert-card h4 {
  font-size: 0.875rem;
}

/* Comparison Table (About) */
.comparison-table {
  padding: 60px 0;
  background-color: var(--white);
}

.comparison-table h2 {
  margin-bottom: 32px;
}

/* Service Page */
.service-block {
  padding: 60px 0;
}

.service-block h2 {
  margin-bottom: 32px;
}

.service-block p {
  color: var(--text-secondary);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}

.service-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  padding: 32px;
}

.service-card h3 {
  margin-bottom: 16px;
}

.service-card ul {
  list-style: none;
}

.service-card li {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
}

.service-card li:last-child {
  border-bottom: none;
}

.service-card .label {
  color: var(--text-secondary);
}

.service-card .value {
  font-weight: 500;
}

/* FAQ */
.faq {
  padding: 60px 0;
  background-color: var(--white);
}

.faq h2 {
  margin-bottom: 32px;
}

.faq__items {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  border-bottom: 1px solid var(--border);
}

.faq__question {
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 500;
}

.faq__question svg {
  width: 24px;
  height: 24px;
  stroke: var(--text-secondary);
  transition: transform 0.2s;
}

.faq__item.active .faq__question svg {
  transform: rotate(180deg);
}

.faq__answer {
  padding-bottom: 24px;
  display: none;
}

.faq__item.active .faq__answer {
  display: block;
}

.faq__answer p {
  color: var(--text-secondary);
  margin-bottom: 0;
}

/* Contacts Page */
.contacts-grid {
  padding: 60px 0;
}

.contacts-grid__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.contacts-info__block {
  margin-bottom: 32px;
}

.contacts-info__block h3 {
  margin-bottom: 16px;
}

.contacts-info__block p {
  color: var(--text-secondary);
}

.contacts-info__block a {
  display: block;
  color: var(--text-primary);
  font-weight: 500;
}

.contacts-info__block .phone {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--accent);
}

.contacts-map {
  background-color: var(--white);
  border: 1px solid var(--border);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.contacts-map svg {
  width: 60px;
  height: 60px;
  stroke: var(--text-secondary);
}

/* Thank You Page */
.thank-you {
  padding: 100px 0;
  text-align: center;
}

.thank-you h1 {
  margin-bottom: 24px;
}

.thank-you p {
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 32px;
}

/* Privacy Page */
.privacy {
  padding: 60px 0;
}

.privacy h1 {
  margin-bottom: 32px;
}

.privacy h2 {
  margin-top: 40px;
  margin-bottom: 16px;
}

.privacy p {
  color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero__image {
    order: -1;
  }

  .advantages__grid,
  .industries__grid,
  .certificates__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .product-hero__inner {
    grid-template-columns: 1fr;
  }

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

  .contacts-grid__inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }

  .header__inner {
    flex-wrap: wrap;
  }

  .nav {
    display: none;
    width: 100%;
    order: 3;
    flex-direction: column;
    gap: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
  }

  .nav.active {
    display: flex;
  }

  .nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
  }

  .nav-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
  }

  .header__contacts {
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
  }

  .advantages__grid,
  .industries__grid,
  .certificates__grid,
  .docs-grid,
  .service-grid {
    grid-template-columns: 1fr;
  }

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

  .hero__buttons {
    flex-direction: column;
  }

  .hero__buttons .btn {
    width: 100%;
  }

  .timeline__items::before {
    left: 20px;
  }

  .timeline__item,
  .timeline__item:nth-child(even) {
    padding-left: 50px;
    padding-right: 0;
    justify-content: flex-start;
  }

  .timeline__item::before {
    left: 20px;
  }

  .table-wrapper {
    position: relative;
  }

  .table-wrapper::after {
    content: '← горизонтальный скролл →';
    display: block;
    padding: 8px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border);
  }

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

  .footer__bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 40px 0;
  }

  .hero__content h1 {
    font-size: 1.75rem;
  }

  .advantages,
  .comparison,
  .industries,
  .lead-form,
  .seo-text {
    padding: 40px 0;
  }
}