:root {
  --primary: #273241;
  --primary-dark: #182231;
  --steel: #61748d;
  --accent: #5f7e9f;
  --accent-dark: #405b78;
  --accent-soft: #e7eef6;
  --bg: #f2f6fa;
  --border: #d6e0ea;
  --text-soft: #5b6c80;
  --white: #ffffff;
  --shadow: 0 10px 30px rgba(24, 34, 49, 0.06);
  --radius-lg: 28px;
  --radius-md: 22px;
  --radius-sm: 16px;
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--primary-dark);
  background: var(--white);
}

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

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

.container {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.section {
  padding: 88px 0;
}

.section-alt {
  background: var(--bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 30px rgba(24, 34, 49, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 88px;
}

.brand {
  min-width: 220px;
}

.brand-logo {
  width: 280px;
  height: auto;
}

.main-nav {
  display: flex;
  gap: 28px;
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--primary-dark);
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--white);
}

.lang-btn {
  border: 0;
  background: transparent;
  color: var(--text-soft);
  padding: 10px 14px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
}

.lang-btn.active {
  color: var(--white);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
}

.hero {
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top right, rgba(95, 126, 159, 0.18), transparent 28%),
    radial-gradient(circle at left center, rgba(97, 116, 141, 0.14), transparent 25%),
    linear-gradient(180deg, var(--bg) 0%, var(--white) 65%);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}

.eyebrow,
.section-tag {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 8px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid var(--border);
  color: var(--steel);
  font-size: 14px;
  font-weight: 600;
}

.section-tag {
  min-height: unset;
  padding: 6px 12px;
  background: var(--accent-soft);
  border: 0;
  color: var(--accent-dark);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

.section-tag-dark {
  background: rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.82);
}

h1,
h2,
h3 {
  margin: 0;
}

h1 {
  margin-top: 18px;
  font-size: clamp(38px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.hero-text,
.section-heading p,
.body-copy,
.roadmap-card p,
.contact-card,
.rfq-list,
.rfq-example p {
  color: var(--text-soft);
  line-height: 1.7;
}

.hero-text {
  margin: 20px 0 0;
  font-size: 18px;
  max-width: 760px;
}

.hero-actions,
.contact-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 18px;
  font-weight: 700;
  font-size: 15px;
}

.btn-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  box-shadow: var(--shadow);
}

.btn-secondary {
  color: var(--primary-dark);
  background: var(--white);
  border: 1px solid var(--primary-dark);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 34px;
}

.stat-card,
.rfq-card,
.product-card,
.benefit-card,
.audience-card,
.adv-card,
.process-card,
.contact-card {
  border: 1px solid var(--border);
  background: var(--white);
  box-shadow: var(--shadow);
}

.stat-card {
  padding: 18px;
  border-radius: var(--radius-sm);
}

.stat-value {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary-dark);
}

.stat-label {
  margin-top: 6px;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.5;
}

.rfq-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.9);
}

.rfq-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}

.rfq-title {
  margin-top: 10px;
  font-size: 28px;
  line-height: 1.15;
}

.rfq-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}

.rfq-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 14px;
}

.rfq-list li::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.rfq-example {
  margin-top: 26px;
  padding: 22px;
  border-radius: 24px;
  background: var(--primary-dark);
  color: var(--white);
}

.rfq-example-label {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.rfq-example-title {
  margin-top: 10px;
  font-weight: 700;
  font-size: 18px;
  line-height: 1.5;
}

.rfq-example p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.74);
}

.section-heading {
  max-width: 860px;
}

.section-heading.compact {
  max-width: 580px;
}

.section-heading h2 {
  margin-top: 14px;
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section-heading p {
  margin-top: 16px;
  font-size: 18px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.product-card {
  min-height: 250px;
  padding: 26px;
  border-radius: var(--radius-md);
}

.product-index,
.benefit-card span,
.process-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 800;
}

.product-card h3,
.process-card h3 {
  margin-top: 18px;
  font-size: 24px;
  line-height: 1.2;
}

.product-card p,
.benefit-card p,
.audience-card,
.adv-card,
.process-card p {
  margin: 14px 0 0;
  color: var(--text-soft);
  line-height: 1.7;
}

.tone-1 { background: linear-gradient(180deg, var(--bg), var(--white)); }
.tone-2 { background: linear-gradient(180deg, #f7f9fc, var(--white)); }
.tone-3 { background: linear-gradient(180deg, #eef4fa, var(--white)); }
.tone-4 { background: linear-gradient(180deg, #f5f8fb, var(--white)); }
.tone-5 { background: linear-gradient(180deg, #f0f5fb, var(--white)); }

.split-grid,
.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 34px;
  align-items: start;
}

.benefits-grid,
.audience-grid,
.adv-grid,
.process-grid {
  display: grid;
  gap: 16px;
}

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

.benefit-card,
.audience-card,
.adv-card,
.process-card {
  padding: 22px;
  border-radius: var(--radius-md);
}

.benefit-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.benefit-card p {
  margin-top: 2px;
}

.audience-card {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary-dark);
}

.body-copy {
  font-size: 18px;
  margin: 20px 0 0;
}

.adv-card {
  position: relative;
  padding-left: 42px;
}

.adv-card::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 20px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

.process-grid {
  grid-template-columns: repeat(4, 1fr);
  margin-top: 34px;
}

.roadmap-card {
  padding: 34px;
  border-radius: var(--radius-lg);
  color: var(--white);
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--steel) 100%);
  box-shadow: var(--shadow);
}

.roadmap-card h2 {
  margin-top: 14px;
  font-size: clamp(30px, 3.2vw, 42px);
  line-height: 1.12;
}

.roadmap-card p {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

.contact-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--bg);
}

.contact-lines {
  display: grid;
  gap: 16px;
  color: var(--text-soft);
  font-size: 17px;
}

.contact-lines strong {
  color: var(--primary-dark);
}

.site-footer {
  padding: 24px 0 36px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-soft);
  font-size: 14px;
}

@media (max-width: 1100px) {
  .hero-grid,
  .split-grid,
  .about-grid,
  .contact-grid,
  .products-grid,
  .process-grid,
  .benefits-grid,
  .audience-grid,
  .adv-grid,
  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-grid,
  .split-grid,
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .main-nav {
    display: none;
  }
}

@media (max-width: 720px) {
  .section {
    padding: 72px 0;
  }

  .brand-logo {
    width: 210px;
  }

  .header-inner {
    min-height: 78px;
  }

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

  .products-grid,
  .benefits-grid,
  .audience-grid,
  .adv-grid,
  .process-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .rfq-card,
  .roadmap-card,
  .contact-card,
  .product-card,
  .benefit-card,
  .audience-card,
  .adv-card,
  .process-card {
    padding: 20px;
  }

  .hero-actions,
  .contact-actions,
  .footer-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}