:root {
  --ink: #10232d;
  --muted: #60727c;
  --line: #d3e0e5;
  --page: #f2f7f9;
  --page-muted: #e7f0f4;
  --surface: #ffffff;
  --surface-soft: #f9fcfd;
  --surface-tint: #f3f8fa;
  --panel: #edf6f8;
  --white: #ffffff;
  --navy: #071d2a;
  --teal: #0a6f7d;
  --teal-dark: #053342;
  --blue: #1b63b7;
  --green: #6c8f51;
  --cta: #f0a11a;
  --cta-hover: #ffb234;
  --cta-border: #b66f00;
  --cta-shadow: rgba(161, 101, 0, 0.24);
  --yellow: #e3ad31;
  --charcoal: #102a35;
  --shadow: 0 22px 55px rgba(10, 28, 37, 0.14);
  --shadow-soft: 0 12px 30px rgba(10, 28, 37, 0.08);
  --radius: 8px;
  --max: 1140px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--page);
  line-height: 1.6;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--white);
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(5, 24, 35, 0.97);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 28px rgba(6, 25, 34, 0.16);
}

.header-inner {
  width: min(100% - 32px, var(--max));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  min-width: 156px;
}

.brand-logo {
  display: block;
  width: 148px;
  max-width: min(42vw, 168px);
  height: auto;
  border-radius: 6px;
  background: #020405;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.16);
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--teal-dark);
  color: var(--white);
  font-weight: 800;
  letter-spacing: 0;
}

.brand-name {
  display: block;
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1.1;
}

.brand-sub {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.2;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.95rem;
  color: #e9f6f8;
}

.main-nav a {
  text-decoration: none;
  font-weight: 650;
}

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

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
}

.btn {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 12px 19px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 750;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.btn svg,
.icon svg,
.card-link svg {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.btn:hover,
.btn:focus {
  transform: translateY(-1px);
  box-shadow: 0 10px 22px rgba(10, 28, 37, 0.12);
}

.btn-primary {
  background: var(--cta);
  color: var(--ink);
  border-color: var(--cta-border);
  box-shadow: 0 8px 18px var(--cta-shadow);
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--cta-hover);
  border-color: var(--cta-border);
  box-shadow: 0 10px 22px var(--cta-shadow);
}

.btn-secondary {
  background: #0b4c5d;
  color: var(--white);
  border-color: #0b4c5d;
  box-shadow: none;
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--teal);
}

.btn-light {
  background: var(--surface);
  color: var(--teal-dark);
  border-color: var(--line);
}

.hero {
  position: relative;
  min-height: clamp(540px, 68vh, 660px);
  display: flex;
  align-items: center;
  color: var(--white);
  background:
    radial-gradient(circle at 78% 28%, rgba(40, 132, 185, 0.22) 0, rgba(40, 132, 185, 0) 36%),
    linear-gradient(135deg, #061824 0%, #07335d 54%, #075466 100%);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    url("/assets/air-system-line-overlay.png") right 5vw center / min(62vw, 820px) auto no-repeat,
    linear-gradient(115deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.055) 42%, rgba(255,255,255,0) 58%);
  opacity: 0.42;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(3, 17, 29, 0.48) 0%, rgba(3, 17, 29, 0.25) 52%, rgba(3, 17, 29, 0.08) 100%),
    linear-gradient(0deg, rgba(3, 17, 29, 0.28) 0%, rgba(3, 17, 29, 0) 58%, rgba(3, 17, 29, 0.1) 100%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
  padding: 76px 0 92px;
}

.hero-content {
  max-width: 760px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  color: #e7f8fa;
  font-size: 0.93rem;
  font-weight: 750;
  text-transform: none;
  letter-spacing: 0;
  backdrop-filter: blur(8px);
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--yellow);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
  letter-spacing: 0;
}

h1 {
  max-width: 14ch;
  font-size: clamp(2.35rem, 4.7vw, 4.05rem);
  font-weight: 840;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.18);
}

.hero p {
  max-width: 620px;
  margin: 18px 0 0;
  color: #eef8fa;
  font-size: clamp(1.04rem, 1.7vw, 1.2rem);
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
  overflow-wrap: break-word;
}

.hero .hero-note {
  max-width: 560px;
  margin-top: 14px;
  color: #d8ecef;
  font-size: 0.96rem;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
  max-width: 100%;
}

.service-tags span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 7px 11px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
  color: #edf7f8;
  font-size: 0.9rem;
  font-weight: 700;
  backdrop-filter: blur(8px);
  max-width: 100%;
}

.service-tags svg {
  width: 16px;
  height: 16px;
}

.hero-actions,
.cta-actions,
.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.form-actions .btn-secondary {
  background: var(--cta);
  color: var(--ink);
  border-color: var(--cta-border);
  box-shadow: 0 8px 18px var(--cta-shadow);
}

.form-actions .btn-secondary:hover,
.form-actions .btn-secondary:focus {
  background: var(--cta-hover);
  border-color: var(--cta-border);
  box-shadow: 0 10px 22px var(--cta-shadow);
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 820px;
  margin-top: 26px;
}

.hero-point {
  min-height: 78px;
  padding: 16px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.09);
  color: #f9ffff;
  backdrop-filter: blur(10px);
}

.hero-point strong {
  display: block;
  font-size: 0.98rem;
}

.hero-point span {
  display: block;
  margin-top: 2px;
  color: #d8ecef;
  font-size: 0.86rem;
  line-height: 1.35;
}

.conversion-strip {
  position: relative;
  z-index: 2;
  margin-top: -44px;
  background: transparent;
}

.conversion-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.8fr);
  gap: 28px;
  align-items: center;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
}

.conversion-grid h2 {
  font-size: clamp(1.5rem, 3vw, 2.3rem);
}

.conversion-grid p {
  margin: 10px 0 0;
  color: var(--muted);
}

.quick-actions {
  display: grid;
  gap: 12px;
}

.quick-action {
  display: flex;
  gap: 12px;
  align-items: center;
  min-height: 70px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  box-shadow: 0 8px 20px rgba(10, 28, 37, 0.05);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.quick-action:hover,
.quick-action:focus {
  border-color: rgba(11, 100, 114, 0.38);
  background: var(--surface-soft);
  box-shadow: 0 14px 28px rgba(10, 28, 37, 0.1);
  transform: translateY(-1px);
}

.quick-action strong,
.quick-action span span {
  display: block;
}

.quick-action span span {
  color: var(--muted);
  font-size: 0.92rem;
}

.section {
  padding: 78px 0;
  scroll-margin-top: 92px;
}

.section-tight {
  padding: 64px 0;
}

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

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

.section-head {
  max-width: 760px;
  margin-bottom: 34px;
}

.compact-head {
  max-width: 680px;
  margin-bottom: 24px;
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
}

.section-kicker {
  margin: 0 0 10px;
  color: var(--teal);
  font-weight: 780;
  text-transform: none;
  font-size: 0.94rem;
  letter-spacing: 0;
}

h2 {
  font-size: clamp(1.85rem, 3.4vw, 2.9rem);
  font-weight: 830;
}

.section-tight h2 {
  font-size: clamp(1.75rem, 3vw, 2.65rem);
}

h3 {
  font-size: 1.25rem;
  font-weight: 800;
}

.lead {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.grid {
  display: grid;
  gap: 18px;
}

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

.two-col {
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  align-items: start;
  gap: 34px;
}

.card {
  min-height: 100%;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 10px 26px rgba(10, 28, 37, 0.06);
}

.service-card {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  align-content: start;
  align-self: start;
  column-gap: 14px;
  row-gap: 8px;
  min-height: 176px;
  text-decoration: none;
  border-top: 3px solid rgba(27, 99, 183, 0.32);
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.service-card:hover,
.service-card:focus {
  border-color: rgba(11, 100, 114, 0.42);
  border-top-color: var(--cta);
  background: var(--surface-soft);
  box-shadow: 0 18px 36px rgba(10, 28, 37, 0.12);
  transform: translateY(-2px);
}

.service-card .icon {
  grid-column: 1;
  grid-row: 1;
  width: 44px;
  height: 44px;
  margin: 0;
}

.service-card h3 {
  grid-column: 2;
  align-self: center;
  font-size: 1.08rem;
  line-height: 1.18;
}

.icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: var(--radius);
  background: #e5f2f7;
  color: var(--blue);
}

.card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.service-card p {
  grid-column: 1 / -1;
  margin-top: 8px;
  font-size: 0.94rem;
  line-height: 1.48;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: auto;
  padding-top: 18px;
  color: var(--teal-dark);
  font-weight: 800;
}

.service-card .card-link {
  grid-column: 1 / -1;
  margin-top: 4px;
  padding-top: 0;
  font-size: 0.92rem;
}

.topic-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.topic-links a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--teal-dark);
  font-size: 0.94rem;
  font-weight: 750;
  text-decoration: none;
  box-shadow: 0 5px 14px rgba(10, 28, 37, 0.04);
}

.topic-links a:hover,
.topic-links a:focus {
  border-color: rgba(11, 100, 114, 0.38);
  background: var(--surface);
}

.tick-list,
.plain-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.tick-list li,
.plain-list li {
  position: relative;
  padding-left: 30px;
  color: var(--charcoal);
}

.tick-list li::before,
.plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.54em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(119, 169, 71, 0.16);
}

.panel {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--navy);
  color: var(--white);
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.panel p {
  color: #d9e5e8;
}

.pricing-panel {
  align-self: start;
}

.price-label {
  margin: 0;
  color: #bfe2ec;
  font-weight: 800;
  font-size: 0.95rem;
}

.price-amount {
  margin: 4px 0 18px;
  color: var(--white);
  font-size: clamp(2.8rem, 5vw, 4.1rem);
  font-weight: 880;
  line-height: 0.95;
}

.panel .tick-list li {
  color: #f7fbfc;
}

.van-ad {
  background:
    linear-gradient(180deg, var(--surface) 0%, var(--page-muted) 100%);
}

.van-ad-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(420px, 1.22fr);
  gap: 38px;
  align-items: center;
}

.van-ad-copy {
  max-width: 560px;
}

.van-ad-copy .hero-actions {
  margin-top: 24px;
}

.van-ad-media {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #071d2a;
  box-shadow: var(--shadow);
}

.van-ad-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 768;
  object-fit: cover;
}

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

.process .card {
  position: relative;
  padding-top: 62px;
  box-shadow: 0 10px 26px rgba(10, 28, 37, 0.06);
}

.process .card::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: 22px;
  left: 24px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--yellow);
  color: var(--ink);
  font-weight: 850;
}

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

.cta-band .container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 24px;
}

.cta-band p {
  margin: 10px 0 0;
  color: #d8eff1;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 900px;
  margin: 0 auto;
}

details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 8px 22px rgba(10, 28, 37, 0.05);
}

summary {
  min-height: 58px;
  padding: 18px 20px;
  font-weight: 800;
  cursor: pointer;
}

details p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: start;
}

.contact-methods {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.contact-method {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  text-decoration: none;
  box-shadow: 0 8px 22px rgba(10, 28, 37, 0.05);
}

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

.contact-method span {
  color: var(--muted);
}

.form-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.form-intro {
  display: grid;
  gap: 6px;
  margin: 0 0 4px;
}

.form-intro h3 {
  margin: 0;
  font-size: 1.25rem;
}

.form-intro p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

form {
  display: grid;
  gap: 16px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--charcoal);
  font-weight: 750;
  font-size: 0.94rem;
}

input,
select,
textarea {
  width: 100%;
  min-height: 46px;
  padding: 12px 13px;
  border: 1px solid #c7d4d8;
  border-radius: var(--radius);
  background: var(--surface-soft);
  color: var(--ink);
  font: inherit;
}

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

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(11, 100, 114, 0.18);
  border-color: var(--teal);
}

.form-status {
  margin: 0;
  padding: 12px 14px;
  border: 1px solid rgba(11, 100, 114, 0.22);
  border-radius: var(--radius);
  background: #e8f5f3;
  color: var(--teal-dark);
  font-weight: 750;
}

.fine-print {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.breadcrumb a {
  color: var(--teal-dark);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb span[aria-hidden="true"] {
  color: #9aa7ad;
}

.breadcrumb [aria-current="page"] {
  color: var(--muted);
}

.service-hero {
  padding: 72px 0 62px;
  background:
    linear-gradient(90deg, rgba(242, 247, 249, 0.98) 0%, rgba(242, 247, 249, 0.94) 56%, rgba(231, 240, 244, 0.98) 100%);
  border-bottom: 1px solid var(--line);
}

.service-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.95fr);
  gap: 40px;
  align-items: center;
}

.service-hero h1 {
  max-width: 15ch;
  color: var(--ink);
  font-size: clamp(2.25rem, 4.5vw, 4rem);
}

.service-hero p {
  max-width: 650px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1.13rem;
}

.hero-card {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.service-panel {
  display: grid;
  gap: 12px;
  padding: 20px;
  border: 1px solid var(--line);
  box-shadow: 0 12px 30px rgba(10, 28, 37, 0.08);
}

.service-panel-row {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 70px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-tint);
}

.service-panel-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  border-radius: var(--radius);
  background: #e5f2f7;
  color: var(--blue);
}

.service-panel strong,
.service-panel small {
  display: block;
}

.service-panel strong {
  color: var(--ink);
  font-size: 0.98rem;
}

.service-panel small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 0.86rem;
}

.service-panel svg {
  width: 19px;
  height: 19px;
}

.quote-box {
  padding: 22px;
  border-left: 5px solid var(--yellow);
  background: var(--surface-soft);
  border-radius: var(--radius);
}

.site-footer {
  padding: 48px 0 28px;
  background: #061923;
  color: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.8fr 0.8fr 1fr;
  gap: 28px;
}

.site-footer a {
  color: #d9f1f3;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus {
  color: var(--yellow);
}

.site-footer .brand-logo {
  width: 178px;
  max-width: 100%;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.12);
}

.footer-title {
  margin: 0 0 12px;
  color: var(--white);
  font-weight: 800;
}

.footer-links {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.12);
  color: #b8c8cd;
  font-size: 0.9rem;
}

@media (max-width: 980px) {
  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    background: rgba(5, 24, 35, 0.98);
    box-shadow: var(--shadow);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 12px;
  }

  .header-actions .btn {
    display: none;
  }

  .hero {
    min-height: auto;
  }

  .hero::after {
    background:
      linear-gradient(90deg, rgba(3, 17, 29, 0.54) 0%, rgba(3, 17, 29, 0.32) 60%, rgba(3, 17, 29, 0.18) 100%),
      linear-gradient(0deg, rgba(3, 17, 29, 0.36) 0%, rgba(3, 17, 29, 0.04) 55%, rgba(3, 17, 29, 0.18) 100%);
  }

  .hero::before {
    background:
      url("/assets/air-system-line-overlay.png") right -160px top 54px / 620px auto no-repeat,
      linear-gradient(115deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.055) 42%, rgba(255,255,255,0) 58%);
    opacity: 0.32;
  }

  .hero-inner {
    padding: 72px 0 82px;
  }

  .hero-points {
    display: none;
  }

  .hero-points,
  .conversion-grid,
  .services-grid,
  .process,
  .two-col,
  .contact-layout,
  .van-ad-inner,
  .service-hero-inner,
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

  .cta-band .container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  .header-inner {
    width: min(100% - 24px, var(--max));
    min-height: 76px;
  }

  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: 148px;
    max-width: 46vw;
  }

  .brand-sub {
    display: none;
  }

  .hero::after {
    background:
      linear-gradient(90deg, rgba(3, 17, 29, 0.6) 0%, rgba(3, 17, 29, 0.42) 66%, rgba(3, 17, 29, 0.28) 100%),
      linear-gradient(0deg, rgba(3, 17, 29, 0.42) 0%, rgba(3, 17, 29, 0.08) 48%, rgba(3, 17, 29, 0.2) 100%);
  }

  .hero::before {
    background:
      url("/assets/air-system-line-overlay.png") right -265px top 72px / 560px auto no-repeat,
      linear-gradient(115deg, rgba(255,255,255,0) 0%, rgba(255,255,255,0.05) 42%, rgba(255,255,255,0) 58%);
    opacity: 0.28;
  }

  h1 {
    font-size: clamp(2.12rem, 10vw, 3rem);
  }

  .hero-content {
    max-width: min(100%, 335px);
  }

  .hero-content h1 {
    max-width: 11.6ch;
  }

  .hero p,
  .hero .hero-note {
    max-width: 100%;
  }

  .eyebrow {
    max-width: 100%;
    font-size: 0.86rem;
  }

  .service-tags {
    display: grid;
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .service-tags span {
    width: auto;
  }

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

  .hero-points,
  .conversion-grid,
  .services-grid,
  .process,
  .two-col,
  .contact-layout,
  .van-ad-inner,
  .service-hero-inner,
  .footer-grid,
  .field-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 64px 0;
  }

  .conversion-strip {
    margin-top: 0;
    background: var(--page);
  }

  .conversion-grid {
    width: 100%;
    padding: 22px;
    border-radius: var(--radius);
  }

  .service-card {
    min-height: auto;
  }

  .service-hero {
    overflow: hidden;
  }

  .service-hero-inner {
    display: block;
  }

  .service-hero-inner > * + * {
    margin-top: 32px;
  }

  .hero-card {
    max-width: 100%;
  }

  .service-panel {
    padding: 14px;
  }

  .hero-actions,
  .cta-actions,
  .form-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .footer-bottom {
    flex-direction: column;
  }
}