:root {
  --ink: #101518;
  --ink-soft: #283036;
  --paper: #f5f4f0;
  --white: #ffffff;
  --orange: #f15a24;
  --orange-dark: #ce4212;
  --line: #d8d9d6;
  --muted: #667078;
  --dark-muted: #aeb6ba;
  --green: #c7f05a;
  --shell: min(1180px, calc(100% - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
summary,
a {
  -webkit-tap-highlight-color: transparent;
}

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

.section-shell {
  width: var(--shell);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(16, 21, 24, 0.12);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  width: var(--shell);
  min-height: 90px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.bei-logo {
  width: 132px;
  height: auto;
  flex-shrink: 0;
}

.brand-mark {
  width: 39px;
  height: 39px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--orange);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand > span:last-child {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand strong {
  font-size: 20px;
  line-height: 1;
  letter-spacing: -0.04em;
}

.brand small {
  color: var(--muted);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.desktop-nav a {
  position: relative;
  padding: 28px 0;
  font-size: 13px;
  font-weight: 700;
}

.desktop-nav a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 20px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.desktop-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 18px;
}

.phone-link {
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.03em;
}

.button {
  min-height: 50px;
  padding: 0 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  border: 1px solid transparent;
  border-radius: 3px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.015em;
  transition:
    background 180ms ease,
    border-color 180ms ease,
    transform 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-small {
  min-height: 42px;
  padding: 0 16px;
  color: var(--white);
  background: var(--ink);
}

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

.mobile-menu {
  display: none;
  position: relative;
}

.mobile-menu summary {
  width: 44px;
  height: 44px;
  padding: 12px 10px;
  list-style: none;
  cursor: pointer;
  background: var(--ink);
  border-radius: 3px;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-menu summary span {
  display: block;
  height: 2px;
  margin: 4px 0;
  background: var(--white);
}

.mobile-menu nav {
  position: absolute;
  top: 52px;
  right: 0;
  width: min(300px, calc(100vw - 32px));
  padding: 12px;
  display: flex;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: 0 20px 60px rgba(16, 21, 24, 0.16);
}

.mobile-menu nav a {
  padding: 15px 12px;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  font-weight: 750;
}

.mobile-menu nav a:last-child {
  color: var(--orange-dark);
  border-bottom: 0;
}

.hero {
  min-height: 700px;
  position: relative;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 62% 82%, rgba(241, 90, 36, 0.14), transparent 30%),
    var(--ink);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(
      90deg,
      rgba(16, 21, 24, 0.98) 0%,
      rgba(16, 21, 24, 0.93) 22%,
      rgba(16, 21, 24, 0.58) 43%,
      rgba(16, 21, 24, 0.08) 64%,
      transparent 100%
    ),
    linear-gradient(0deg, rgba(16, 21, 24, 0.42), transparent 45%);
}

.hero::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(50% + 225px);
  z-index: 2;
  width: 1px;
  opacity: 0.22;
  background: var(--white);
}

.hero-image {
  position: absolute;
  inset: 0;
  background-image: url("images/boiler-room-installation.png");
  background-position: right bottom;
  background-size: auto 100%;
  background-repeat: no-repeat;
  filter: saturate(0.95) contrast(1.02);
}

.installation-photo, .project-photo { margin: 36px 0 0; }
.installation-photo img, .project-photo img { width: 100%; height: auto; object-fit: cover; }
.installation-photo img { max-height: 420px; }
.project-photo img { max-height: 470px; object-position: center; }
.installation-photo figcaption, .project-photo figcaption { margin-top: 10px; font-size: 13px; color: inherit; opacity: .7; }
.project-photo { margin: 26px 0 44px; }

.comparison-teaser {
  padding: 76px 0;
  background: #e9eceb;
  border-bottom: 1px solid var(--line);
}
.comparison-teaser-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.comparison-teaser h2 { max-width: 600px; margin: 0; font-size: clamp(34px, 4vw, 56px); letter-spacing: -.05em; line-height: 1.06; }
.comparison-teaser p:not(.eyebrow) { max-width: 530px; margin: 0 0 25px; color: var(--ink-soft); font-size: 17px; line-height: 1.65; }
.comparison-teaser .button { color: var(--white); background: var(--ink); }
.comparison-teaser .button:hover { background: var(--orange-dark); }

.comparison-page { background: var(--paper); }
.comparison-header { min-height: 82px; background: var(--white); border-bottom: 1px solid var(--line); }
.comparison-header .section-shell { min-height: 82px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.comparison-header nav { display: flex; flex-wrap: wrap; gap: 24px; font-size: 14px; font-weight: 700; }
.comparison-header nav a:hover { color: var(--orange-dark); }
.comparison-intro { padding: 92px 0 76px; display: grid; grid-template-columns: 1fr .78fr; gap: 72px; align-items: center; }
.comparison-intro h1 { margin: 0; max-width: 790px; font-size: clamp(48px, 6vw, 84px); line-height: 1; letter-spacing: -.065em; }
.comparison-intro p:not(.eyebrow) { max-width: 670px; font-size: 18px; line-height: 1.65; color: var(--ink-soft); }
.comparison-intro img { width: 100%; max-height: 480px; object-fit: cover; }
.comparison-table-section { padding: 75px 0 105px; background: var(--white); }
.comparison-table-section h2, .comparison-followup h2 { margin: 0 0 28px; font-size: clamp(34px, 4vw, 54px); letter-spacing: -.05em; line-height: 1.1; }
.comparison-table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.comparison-table th, .comparison-table td { padding: 22px 20px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: 15px; line-height: 1.55; }
.comparison-table thead th { color: var(--white); background: var(--ink); font-size: 14px; }
.comparison-table th:first-child { width: 20%; }
.comparison-table tbody th { color: var(--ink); font-weight: 800; }
.comparison-table td { color: var(--ink-soft); }
.comparison-followup { padding: 94px 0; display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.comparison-followup p, .comparison-followup li { font-size: 17px; line-height: 1.65; color: var(--ink-soft); }
.comparison-followup ul { padding-left: 20px; }
.comparison-followup .button { margin-top: 18px; color: var(--white); background: var(--orange); }
.comparison-page footer { padding: 34px 0; }
.comparison-page footer .section-shell { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px; font-size: 13px; }

@media (max-width: 760px) {
  .comparison-teaser-grid, .comparison-intro, .comparison-followup { grid-template-columns: 1fr; gap: 28px; }
  .comparison-teaser { padding: 58px 0; }
  .comparison-header .section-shell { min-height: 76px; }
  .comparison-header .brand > span:last-child { display: none; }
  .comparison-header nav { gap: 12px; }
  .comparison-intro { padding: 60px 0; }
  .comparison-table-section { padding: 65px 0; overflow-x: auto; }
  .comparison-table { min-width: 650px; }
  .comparison-table th, .comparison-table td { padding: 16px 12px; }
  .comparison-followup { padding: 65px 0; }
}

.hero-grid {
  width: var(--shell);
  min-height: 700px;
  margin-inline: auto;
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(0, 720px) minmax(260px, 1fr);
  align-items: end;
  gap: 70px;
  padding: 88px 0 76px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--orange-dark);
  font-size: 11px;
  font-weight: 900;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow-light {
  color: #ff8a61;
}

.hero h1 {
  max-width: 750px;
  margin: 0;
  font-size: clamp(52px, 6vw, 76px);
  font-weight: 760;
  line-height: 0.91;
  letter-spacing: -0.072em;
}

.hero h1 em {
  color: var(--green);
  font-style: normal;
  font-weight: 350;
}

.hero-intro {
  max-width: 610px;
  margin: 30px 0 0;
  color: #d2d7d9;
  font-size: 18px;
  line-height: 1.62;
}

.hero-certifications {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-certifications span {
  padding: 9px 11px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  background: rgba(16, 21, 24, 0.38);
  color: var(--white);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.25;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

.button-ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.03);
}

.button-ghost:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.hero-proof {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  color: var(--dark-muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero-proof span {
  padding-right: 16px;
  margin-right: 16px;
  border-right: 1px solid rgba(255, 255, 255, 0.25);
}

.hero-proof span:last-child {
  border-right: 0;
}

.hero-card {
  align-self: end;
  padding: 28px;
  display: flex;
  flex-direction: column;
  border-top: 3px solid var(--orange);
  background: rgba(16, 21, 24, 0.86);
  backdrop-filter: blur(12px);
}

.hero-card p {
  margin: 0 0 24px;
  color: #ff8a61;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero-card strong {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.hero-card > span {
  color: var(--dark-muted);
  font-size: 13px;
  line-height: 1.55;
}

.hero-card a {
  margin-top: 28px;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  font-size: 12px;
  font-weight: 800;
}

.trust-bar {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.trust-inner {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
}

.trust-inner p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-align: center;
  text-transform: uppercase;
}

.trust-inner span {
  width: 4px;
  height: 4px;
  background: var(--orange);
}

.product-section {
  padding: 120px 0 130px;
}

.section-heading {
  display: grid;
  grid-template-columns: 1.1fr 0.78fr;
  align-items: end;
  gap: 100px;
}

.section-heading h2,
.technology-copy h2,
.resources-intro h2,
.contact-inner h2 {
  margin: 0;
  font-size: clamp(40px, 5vw, 66px);
  font-weight: 730;
  line-height: 0.98;
  letter-spacing: -0.055em;
}

.section-heading > p,
.resources-intro > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.product-grid {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.product-card {
  min-height: 550px;
  padding: 24px 25px 26px;
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--white);
  transition:
    transform 220ms ease,
    box-shadow 220ms ease;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 55px rgba(16, 21, 24, 0.09);
}

.product-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.product-number {
  color: var(--orange);
  font-family: var(--font-geist-mono), monospace;
  font-size: 11px;
  font-weight: 800;
}

.product-meta {
  color: var(--muted);
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.product-image-wrap {
  height: 212px;
  margin: 22px -5px 26px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    linear-gradient(rgba(16, 21, 24, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 21, 24, 0.035) 1px, transparent 1px),
    #f0f1ef;
  background-size: 24px 24px;
}

.product-image {
  width: auto;
  height: 82%;
  object-fit: contain;
  filter: drop-shadow(0 18px 16px rgba(16, 21, 24, 0.18));
  transition: transform 260ms ease;
}

.product-image.product-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 45%;
  filter: none;
}

.product-card:nth-child(2) .product-image-wrap {
  height: 300px;
  background: #1d2529;
}

.product-card:nth-child(2) .product-image.product-photo {
  object-fit: contain;
}

.product-card:hover .product-image {
  transform: scale(1.035);
}

.product-eyebrow {
  margin: 0 0 8px !important;
  color: var(--orange-dark) !important;
  font-size: 10px !important;
  font-weight: 900;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.product-card h3 {
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.04em;
}

.product-card > p {
  margin: 14px 0 24px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.product-card > .product-detail {
  margin-top: -10px;
}

.product-card > a {
  margin-top: auto;
  padding-top: 18px;
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  font-size: 12px;
  font-weight: 850;
}

.product-card > a:hover {
  color: var(--orange-dark);
}

.technology-section {
  padding: 126px 0;
  color: var(--white);
  background:
    radial-gradient(circle at 8% 0%, rgba(241, 90, 36, 0.18), transparent 28%),
    var(--ink);
}

.technology-grid {
  display: grid;
  grid-template-columns: 0.76fr 1.12fr;
  gap: 110px;
}

.technology-copy {
  align-self: start;
  position: sticky;
  top: 130px;
}

.technology-copy p:not(.eyebrow) {
  margin: 28px 0 26px;
  color: var(--dark-muted);
  font-size: 16px;
  line-height: 1.75;
}

.text-link-light {
  display: inline-flex;
  gap: 22px;
  padding-bottom: 7px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.42);
  font-size: 12px;
  font-weight: 850;
}

.text-link-light:hover {
  color: #ff8a61;
  border-color: #ff8a61;
}

.advantage-list {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.advantage-list article {
  padding: 30px 0;
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.advantage-list article > span {
  color: #ff8a61;
  font-family: var(--font-geist-mono), monospace;
  font-size: 11px;
  font-weight: 800;
}

.advantage-list h3 {
  margin: 0 0 9px;
  font-size: 21px;
  letter-spacing: -0.03em;
}

.advantage-list p {
  max-width: 550px;
  margin: 0;
  color: var(--dark-muted);
  font-size: 14px;
  line-height: 1.65;
}

.results-section {
  padding: 120px 0;
}

.results-heading {
  align-items: end;
}

.quiet-link {
  justify-self: end;
  padding-bottom: 7px;
  border-bottom: 1px solid var(--ink);
  font-size: 12px;
  font-weight: 850;
}

.quiet-link:hover {
  color: var(--orange-dark);
  border-color: var(--orange-dark);
}

.case-study-grid {
  margin-top: 58px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.case-study {
  min-height: 480px;
  padding: 42px;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  background: var(--white);
}

.case-study-featured {
  color: var(--white);
  border-color: var(--orange);
  background:
    linear-gradient(145deg, rgba(16, 21, 24, 0.08), rgba(16, 21, 24, 0.28)),
    var(--orange);
}

.case-label {
  margin-bottom: 20px;
  font-size: 10px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.7;
}

.ceremony-photo {
  width: 100%;
  height: 220px;
  margin-bottom: 28px;
  object-fit: cover;
  object-position: center;
  border-radius: 2px;
}

.case-study h3 {
  margin: 0;
  font-size: 34px;
  letter-spacing: -0.045em;
}

.case-study > p {
  max-width: 520px;
  margin: 15px 0 34px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.65;
}

.case-study-featured > p {
  color: rgba(255, 255, 255, 0.82);
}

.metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.metrics > div {
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.case-study-featured .metrics > div {
  border-color: rgba(255, 255, 255, 0.34);
}

.metrics strong {
  font-size: 32px;
  line-height: 1;
  letter-spacing: -0.05em;
}

.metrics span {
  margin-top: 7px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.case-study-featured .metrics span {
  color: rgba(255, 255, 255, 0.72);
}

.case-study > a {
  margin-top: auto;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  font-weight: 850;
}

.case-study:not(.case-study-featured) > a {
  border-top: 1px solid var(--line);
}

.proposal-section {
  padding: 110px 0;
  color: var(--white);
  background: #1d2529;
}

.proposal-grid {
  display: grid;
  grid-template-columns: 0.88fr 1fr;
  gap: 90px;
  align-items: center;
}

.proposal-copy {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 28px;
}

.proposal-badge {
  width: 86px;
  height: 86px;
  display: grid;
  place-items: center;
  color: var(--ink);
  background: var(--green);
  border-radius: 50%;
  font-size: 38px;
  font-weight: 900;
  letter-spacing: -0.07em;
}

.proposal-copy h2 {
  margin: 0;
  font-size: clamp(36px, 4vw, 54px);
  line-height: 1;
  letter-spacing: -0.055em;
}

.proposal-copy p:last-child {
  margin: 24px 0 0;
  color: var(--dark-muted);
  font-size: 15px;
  line-height: 1.7;
}

.proposal-options {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.proposal-options a {
  min-height: 104px;
  display: grid;
  grid-template-columns: 44px 1fr 20px;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: padding 180ms ease;
}

.proposal-options a:hover {
  padding-inline: 12px;
  color: var(--green);
}

.proposal-options a > span {
  color: #ff8a61;
  font-family: var(--font-geist-mono), monospace;
  font-size: 10px;
  font-weight: 800;
}

.proposal-options a div {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.proposal-options strong {
  font-size: 17px;
}

.proposal-options small {
  color: var(--dark-muted);
  font-size: 11px;
}

.proposal-options b {
  font-size: 14px;
}

.resources-section {
  padding: 120px 0 130px;
  display: grid;
  grid-template-columns: 0.67fr 1fr;
  gap: 120px;
}

.resources-intro {
  align-self: start;
  position: sticky;
  top: 130px;
}

.resources-intro > p:last-child {
  margin-top: 28px;
}

.resource-list {
  border-top: 1px solid var(--ink);
}

.resource-list a {
  min-height: 122px;
  display: grid;
  grid-template-columns: 48px 1fr 24px;
  align-items: center;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  transition:
    padding 180ms ease,
    color 180ms ease;
}

.resource-list a:hover {
  padding-inline: 12px;
  color: var(--orange-dark);
}

.resource-list a > span {
  color: var(--orange-dark);
  font-family: var(--font-geist-mono), monospace;
  font-size: 10px;
  font-weight: 800;
}

.resource-list a div {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.resource-list strong {
  font-size: 20px;
  letter-spacing: -0.025em;
}

.resource-list small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.resource-list b {
  font-size: 14px;
}

.contact-band {
  padding: 90px 0;
  color: var(--white);
  background: var(--orange);
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 70px;
}

.contact-inner .eyebrow {
  color: rgba(255, 255, 255, 0.72);
}

.contact-inner h2 {
  max-width: 730px;
}

.contact-actions {
  display: flex;
  align-items: center;
  gap: 30px;
}

.contact-band .button-primary {
  color: var(--white);
  background: var(--ink);
}

.contact-band .button-primary:hover {
  background: #283036;
}

.contact-phone {
  min-width: 140px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.contact-phone small {
  color: rgba(255, 255, 255, 0.72);
  font-size: 9px;
  font-weight: 850;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-phone strong {
  font-size: 15px;
}

footer {
  padding: 70px 0 26px;
  color: var(--white);
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  gap: 100px;
}

.brand-footer .brand-mark {
  color: var(--white);
}

.brand-footer small {
  color: var(--dark-muted);
}

.footer-brand > p {
  max-width: 420px;
  margin: 24px 0 0;
  color: var(--dark-muted);
  font-size: 13px;
  line-height: 1.65;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.footer-links > div {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links strong {
  margin-bottom: 8px;
  color: #ff8a61;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links a {
  color: var(--dark-muted);
  font-size: 12px;
}

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

.footer-bottom {
  margin-top: 60px;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: #788288;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

@media (max-width: 1050px) {
  .desktop-nav,
  .phone-link {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .header-actions {
    margin-left: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr 250px;
    gap: 38px;
  }

  .hero::after {
    display: none;
  }

  .section-heading {
    gap: 50px;
  }

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

  .product-card:last-child {
    grid-column: 1 / -1;
    min-height: 420px;
  }

  .product-card:last-child .product-image-wrap {
    height: 180px;
  }

  .technology-grid,
  .proposal-grid {
    gap: 60px;
  }

  .resources-section {
    gap: 70px;
  }

  .contact-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  :root {
    --shell: min(100% - 32px, 1180px);
  }

  html {
    scroll-padding-top: 75px;
  }

  .header-inner {
    min-height: 76px;
  }

  .bei-logo {
    width: 98px;
  }

  .header-actions {
    display: none;
  }

  .brand strong {
    font-size: 18px;
  }

  .hero,
  .hero-grid {
    min-height: 690px;
  }

  .hero::before {
    background:
      linear-gradient(
        90deg,
        rgba(16, 21, 24, 0.98) 0%,
        rgba(16, 21, 24, 0.9) 65%,
        rgba(16, 21, 24, 0.7) 100%
      ),
      linear-gradient(0deg, rgba(16, 21, 24, 0.6), transparent 55%);
  }

  .hero-image {
    background-position: 62% bottom;
  }

  .hero-grid {
    padding: 70px 0 34px;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: stretch;
    gap: 32px;
  }

  .hero h1 {
    font-size: clamp(49px, 15.5vw, 72px);
  }

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

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-proof {
    gap: 8px 0;
  }

  .hero-proof span {
    width: 50%;
    padding-right: 8px;
    margin-right: 0;
    border-right: 0;
  }

  .hero-card {
    display: none;
  }

  .trust-inner {
    min-height: 0;
    padding: 18px 0;
    flex-direction: column;
    gap: 8px;
  }

  .trust-inner span {
    display: none;
  }

  .product-section,
  .results-section,
  .resources-section {
    padding: 84px 0;
  }

  .section-heading,
  .technology-grid,
  .proposal-grid,
  .resources-section,
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .section-heading h2,
  .technology-copy h2,
  .resources-intro h2,
  .contact-inner h2 {
    font-size: 43px;
  }

  .product-grid,
  .case-study-grid {
    grid-template-columns: 1fr;
  }

  .product-card,
  .product-card:last-child {
    min-height: 520px;
    grid-column: auto;
  }

  .technology-section,
  .proposal-section {
    padding: 84px 0;
  }

  .technology-copy,
  .resources-intro {
    position: static;
  }

  .advantage-list article {
    grid-template-columns: 40px 1fr;
  }

  .quiet-link {
    justify-self: start;
  }

  .case-study {
    min-height: 460px;
    padding: 30px;
  }

  .case-label {
    margin-bottom: 52px;
  }

  .proposal-copy {
    grid-template-columns: 58px 1fr;
    gap: 18px;
  }

  .proposal-badge {
    width: 58px;
    height: 58px;
    font-size: 26px;
  }

  .proposal-copy h2 {
    font-size: 38px;
  }

  .resource-list a {
    min-height: 116px;
  }

  .contact-band {
    padding: 70px 0;
  }

  .contact-actions {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    max-width: 400px;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
}

@media (max-width: 420px) {
  .brand small {
    display: none;
  }

  .hero h1 {
    font-size: 48px;
  }

  .button {
    width: 100%;
  }

  .metrics {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .case-study {
    min-height: 550px;
  }

  .proposal-copy {
    display: block;
  }

  .proposal-badge {
    margin-bottom: 22px;
  }
}

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

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

.industrial-page { background: var(--paper); }
.industrial-hero { position: relative; isolation: isolate; min-height: 590px; display: flex; align-items: center; overflow: hidden; background: var(--ink); color: white; }
.industrial-hero-photo { position: absolute; z-index: -2; inset: 0; background: url('images/heatsponge-industrial-installation.png') center top / cover no-repeat; opacity: .7; }
.industrial-hero::before { content: ''; position: absolute; z-index: -1; inset: 0; background: linear-gradient(90deg, rgba(16,21,24,.97) 0%, rgba(16,21,24,.87) 42%, rgba(16,21,24,.2) 100%); }
.industrial-hero-inner { padding: 108px 0; }
.industrial-hero h1 { max-width: 770px; margin: 22px 0; font-size: clamp(52px, 7vw, 94px); line-height: .99; letter-spacing: -.065em; }
.industrial-hero h1 em { color: var(--green); font-style: normal; }
.industrial-hero-inner > p:not(.eyebrow) { max-width: 625px; margin: 0 0 30px; color: #e1e6e5; font-size: 18px; line-height: 1.6; }
.industrial-proof { background: #e7ebe2; }
.industrial-proof .section-shell { display: flex; justify-content: space-between; gap: 24px; padding: 24px 0; font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: .09em; }
.industrial-intro { padding: 110px 0 60px; display: grid; grid-template-columns: 1fr 2fr; gap: 55px; }
.industrial-intro h2 { max-width: 650px; margin: 0; font-size: clamp(43px, 5vw, 68px); line-height: 1.06; letter-spacing: -.055em; }
.industrial-intro div > p { max-width: 730px; color: var(--muted); line-height: 1.65; font-size: 17px; }
.industrial-families { padding-bottom: 120px; }
.industrial-family { display: grid; grid-template-columns: 1fr 1fr; min-height: 530px; margin-bottom: 26px; background: white; border: 1px solid var(--line); }
.industrial-family:nth-child(even) .industrial-family-image { order: 2; }
.industrial-family-image { min-height: 530px; overflow: hidden; background: #dfe2df; }
.industrial-family-image img { width: 100%; height: 100%; object-fit: cover; }
.industrial-family:nth-child(2) .industrial-family-image { display: grid; place-items: center; background: #252c2e; }
.industrial-family:nth-child(2) .industrial-family-image img { width: min(70%, 340px); height: auto; object-fit: contain; }
.industrial-family:nth-child(3) .industrial-family-image img { object-position: center; }
.industrial-family-copy { padding: clamp(36px, 5vw, 74px); display: flex; flex-direction: column; align-items: flex-start; }
.industrial-family-kicker { display: flex; align-items: center; gap: 18px; color: var(--orange-dark); font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .12em; }
.industrial-family-kicker span:first-child { color: var(--ink); font-size: 28px; letter-spacing: -.06em; }
.industrial-family h3 { margin: 36px 0 17px; font-size: clamp(35px, 4vw, 58px); line-height: 1; letter-spacing: -.055em; }
.industrial-family-copy > p { margin: 0; font-size: 16px; line-height: 1.65; color: var(--ink-soft); }
.industrial-family ul { margin: 24px 0 32px; padding: 0; list-style: none; }
.industrial-family li { padding: 8px 0 8px 20px; position: relative; font-size: 13px; font-weight: 700; }
.industrial-family li::before { content: ''; position: absolute; left: 0; top: 14px; width: 7px; height: 7px; background: var(--orange); }
.industrial-family-copy > a { margin-top: auto; padding-bottom: 7px; border-bottom: 2px solid var(--orange); font-size: 14px; font-weight: 800; }
.industrial-family-copy > a span { margin-left: 8px; color: var(--orange); }
.industrial-cta { background: var(--ink); color: white; padding: 84px 0; }
.industrial-cta .section-shell { display: flex; justify-content: space-between; align-items: end; gap: 50px; }
.industrial-cta h2 { max-width: 650px; margin: 14px 0; font-size: clamp(42px, 5vw, 68px); line-height: 1.05; letter-spacing: -.055em; }
.industrial-cta p:not(.eyebrow) { max-width: 620px; color: var(--dark-muted); line-height: 1.6; }
.industrial-cta-actions { display: flex; flex-direction: column; align-items: flex-start; gap: 22px; flex-shrink: 0; }
.industrial-cta-actions > a:last-child { border-bottom: 1px solid currentColor; padding-bottom: 6px; font-size: 14px; font-weight: 800; }
.industrial-page footer { padding: 34px 0; }
.industrial-page footer .section-shell { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px; font-size: 13px; }
@media (max-width: 900px) {
  .industrial-page .comparison-header nav { gap: 12px; }
  .industrial-intro { grid-template-columns: 1fr; gap: 16px; }
  .industrial-family { grid-template-columns: 1fr; }
  .industrial-family:nth-child(even) .industrial-family-image { order: 0; }
  .industrial-family-image { min-height: 390px; height: 390px; }
  .industrial-cta .section-shell { display: block; }
  .industrial-cta-actions { margin-top: 30px; }
}
@media (max-width: 600px) {
  .industrial-page .comparison-header nav a:nth-child(n+3) { display: none; }
  .industrial-hero { min-height: 650px; align-items: end; }
  .industrial-hero::before { background: linear-gradient(0deg, rgba(16,21,24,.98) 0%, rgba(16,21,24,.75) 65%, rgba(16,21,24,.3) 100%); }
  .industrial-hero-photo { background-position: 55% top; }
  .industrial-hero-inner { padding: 70px 0; }
  .industrial-hero h1 { font-size: clamp(48px, 11vw, 65px); }
  .industrial-proof .section-shell { flex-direction: column; gap: 10px; }
  .industrial-intro { padding: 75px 0 35px; }
  .industrial-families { padding-bottom: 75px; }
  .industrial-family-image { min-height: 280px; height: 280px; }
  .industrial-family-copy { padding: 34px 26px; }
  .industrial-family h3 { margin-top: 28px; }
}