:root {
  --blue-900: #0a3158;
  --blue-800: #0d477d;
  --blue-700: #0b66b2;
  --blue-100: #eaf4ff;
  --blue-050: #f5f9fe;
  --ink: #17212b;
  --muted: #5b6c7a;
  --line: #dbe5ee;
  --panel: #ffffff;
  --steel: #eff4f8;
  --warning: #fff5dc;
  --warning-line: #f0c66a;
  --max: 1180px;
  --shadow: 0 18px 45px rgba(10, 49, 88, .11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, Arial, Helvetica, sans-serif;
  line-height: 1.55;
  background: #fff;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, .95);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav {
  width: min(100% - 32px, var(--max));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 230px;
  font-weight: 800;
  color: var(--blue-900);
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: var(--blue-700);
  border-radius: 8px;
  font-weight: 900;
}

.brand small {
  display: block;
  font-size: 12px;
  color: var(--muted);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-links ul {
  display: contents;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  display: contents;
}

.nav-links a {
  padding: 10px 12px;
  border-radius: 6px;
  color: #31475c;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--blue-800);
  background: var(--blue-100);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  color: var(--blue-900);
  font-size: 23px;
}

.button,
button.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 12px 18px;
  border: 1px solid var(--blue-700);
  border-radius: 6px;
  background: var(--blue-700);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.button:hover {
  transform: translateY(-1px);
  background: var(--blue-800);
  box-shadow: 0 10px 24px rgba(11, 102, 178, .22);
}

.button.secondary {
  background: #fff;
  color: var(--blue-800);
  border-color: #a6c5e3;
}

.button.secondary:hover {
  background: var(--blue-100);
  box-shadow: none;
}

.hero {
  background:
    linear-gradient(90deg, rgba(255,255,255,.98) 0%, rgba(255,255,255,.9) 50%, rgba(235,244,253,.9) 100%),
    repeating-linear-gradient(135deg, #f5f9fd 0 1px, transparent 1px 16px);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  width: min(100% - 32px, var(--max));
  min-height: calc(100vh - 72px);
  max-height: 860px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  align-items: center;
  gap: 46px;
  padding: 54px 0 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue-700);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  color: var(--blue-900);
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.02;
}

h2 {
  color: var(--blue-900);
  font-size: clamp(27px, 4vw, 42px);
  line-height: 1.12;
}

h3 {
  color: var(--blue-900);
  font-size: 21px;
  line-height: 1.25;
}

.lead {
  color: #365064;
  font-size: 18px;
  max-width: 720px;
}

.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 26px;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 34px;
}

.trust-item {
  min-height: 92px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.8);
  border-radius: 8px;
}

.trust-item strong {
  display: block;
  color: var(--blue-900);
  font-size: 14px;
}

.trust-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.hero-card {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.hero-card img {
  width: 100%;
  aspect-ratio: 1.35;
  object-fit: cover;
  background: var(--steel);
}

.hero-card-body {
  padding: 22px;
}

.hero-card-body ul,
.clean-list {
  padding-left: 18px;
  margin: 12px 0 0;
  color: var(--muted);
}

.section {
  padding: 78px 0;
}

.section.alt {
  background: var(--blue-050);
  border-block: 1px solid var(--line);
}

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 28px;
  margin-bottom: 30px;
}

.section-head p {
  max-width: 600px;
  color: var(--muted);
}

.grid-4,
.grid-3,
.grid-2 {
  display: grid;
  gap: 18px;
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.card,
.product-card,
.info-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.card {
  padding: 22px;
}

.product-card {
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}

.product-card:hover {
  transform: translateY(-3px);
  border-color: #b4cde7;
  box-shadow: var(--shadow);
}

.product-card img {
  width: 100%;
  aspect-ratio: 1.42;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
  background: var(--steel);
}

.product-card-body {
  padding: 18px;
}

.product-card p,
.card p,
.info-panel p {
  color: var(--muted);
}

.tag {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 5px 9px;
  border: 1px solid #b7d1eb;
  border-radius: 999px;
  color: var(--blue-800);
  background: var(--blue-100);
  font-size: 12px;
  font-weight: 800;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  gap: 34px;
  align-items: start;
}

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

.feature {
  padding: 18px;
  border-left: 4px solid var(--blue-700);
  background: #fff;
}

.feature strong {
  display: block;
  color: var(--blue-900);
}

.notice {
  padding: 16px 18px;
  border: 1px solid var(--warning-line);
  border-radius: 8px;
  background: var(--warning);
  color: #765417;
}

.page-hero {
  padding: 68px 0 52px;
  background:
    linear-gradient(90deg, #ffffff, #edf6ff),
    repeating-linear-gradient(135deg, #f5f9fd 0 1px, transparent 1px 16px);
  border-bottom: 1px solid var(--line);
}

.breadcrumbs {
  margin-bottom: 16px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs a {
  color: var(--blue-800);
  font-weight: 700;
}

.product-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(330px, .95fr);
  gap: 34px;
  align-items: start;
}

.gallery {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.gallery img {
  width: 100%;
  aspect-ratio: 1.45;
  object-fit: cover;
}

.gallery-caption {
  padding: 14px 16px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.spec-table th,
.spec-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.spec-table th {
  width: 38%;
  color: var(--blue-900);
  background: var(--blue-050);
}

.spec-table tr:last-child th,
.spec-table tr:last-child td {
  border-bottom: 0;
}

.contact-form {
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--blue-900);
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid #bfd0df;
  border-radius: 6px;
  color: var(--ink);
  font: inherit;
  background: #fff;
}

textarea {
  min-height: 132px;
  resize: vertical;
}

.form-note {
  min-height: 24px;
  color: var(--blue-800);
  font-weight: 700;
}

.footer {
  padding: 46px 0 28px;
  color: #dce9f6;
  background: var(--blue-900);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr .8fr;
  gap: 28px;
}

.footer a,
.footer p {
  color: #dce9f6;
}

.footer h3 {
  color: #fff;
}

.footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer li + li {
  margin-top: 8px;
}

.copyright {
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,.16);
  color: #a8c2dd;
  font-size: 13px;
}

@media (max-width: 920px) {
  .menu-button {
    display: inline-grid;
    place-items: center;
  }

  .nav {
    min-height: 66px;
  }

  .nav-links {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 68px;
    display: none;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
  }

  .nav-links.open {
    display: grid;
  }

  .hero-grid,
  .split,
  .product-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: auto;
    max-height: none;
    padding: 42px 0 56px;
    align-items: start;
  }

  .trust-strip,
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 620px) {
  body {
    overflow-x: hidden;
  }

  .container,
  .hero-grid,
  .nav {
    width: min(100% - 28px, var(--max));
  }

  .brand {
    min-width: 0;
  }

  .brand span {
    max-width: 210px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .nav {
    gap: 10px;
    min-height: 64px;
  }

  .menu-button {
    flex: 0 0 42px;
  }

  h1 {
    font-size: 34px;
    line-height: 1.08;
  }

  h2 {
    font-size: 28px;
    line-height: 1.14;
  }

  .lead,
  .section-head p {
    font-size: 17px;
  }

  .hero-grid {
    gap: 24px;
    padding: 30px 0 42px;
  }

  .trust-strip {
    margin-top: 24px;
  }

  .trust-strip,
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
    margin-bottom: 20px;
  }

  .section-head h2 {
    margin-bottom: 14px;
  }

  .section {
    padding: 44px 0;
  }

  .page-hero {
    padding: 46px 0 38px;
  }

  .hero-card-body,
  .product-card-body,
  .card {
    padding: 18px;
  }

  .product-card img,
  .hero-card img,
  .gallery img {
    aspect-ratio: 1.65;
  }

  .product-card {
    transform: none;
  }

  .hero-actions,
  .inline-actions {
    align-items: stretch;
  }

  .button {
    width: 100%;
  }
}