:root {
  --ink: #18212b;
  --muted: #5d6b78;
  --line: #dfe6ec;
  --soft: #f5f8fa;
  --panel: #ffffff;
  --brand: #e85d27;
  --brand-dark: #b93f16;
  --teal: #0f766e;
  --teal-dark: #0b4f4a;
  --graphite: #27313d;
  --shadow: 0 16px 40px rgba(24, 33, 43, 0.12);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
}

.home-dark {
  background: #050505;
}

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

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

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

.topbar {
  background: var(--graphite);
  color: #fff;
  font-size: 13px;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 0;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner {
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand), var(--teal));
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 17px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--graphite);
  font-size: 15px;
  font-weight: 700;
}

.nav a:hover {
  color: var(--brand);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 8px;
  width: 42px;
  height: 42px;
  font-size: 22px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn-primary {
  color: #fff;
  background: var(--brand);
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.btn-glass {
  color: #fff;
  background: rgba(255,255,255,0.04);
  border-color: rgba(255,255,255,0.48);
}

.btn-glass:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.dark-header {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid rgba(255,255,255,0.11);
  background: rgba(0,0,0,0.42);
  backdrop-filter: blur(10px);
}

.dark-nav {
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.dark-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  min-width: 206px;
}

.dark-logo-mark {
  width: 42px;
  height: 42px;
  border: 4px solid var(--brand);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
  clip-path: polygon(25% 4%, 75% 4%, 100% 50%, 75% 96%, 25% 96%, 0 50%);
}

.dark-logo strong {
  display: block;
  line-height: 1;
  letter-spacing: 2px;
  font-size: 18px;
}

.dark-logo small {
  display: block;
  color: var(--brand);
  font-size: 10px;
  letter-spacing: 2px;
  font-weight: 900;
}

.dark-menu {
  color: #fff;
  gap: 28px;
}

.dark-menu a {
  color: #fff;
  position: relative;
}

.dark-menu a.active,
.dark-menu a:hover {
  color: var(--brand);
}

.dark-menu a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -26px;
  height: 2px;
  background: var(--brand);
}

.quote-pill {
  min-height: 42px;
  padding: 10px 20px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff !important;
}

.template-hero {
  position: relative;
  min-height: 720px;
  overflow: hidden;
  padding-top: 76px;
  background: #050505;
}

.template-hero-image,
.template-hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.template-hero-image {
  object-fit: cover;
  object-position: center;
}

.template-hero-shade {
  background:
    linear-gradient(90deg, rgba(0,0,0,0.94) 0%, rgba(0,0,0,0.83) 30%, rgba(0,0,0,0.20) 72%, rgba(0,0,0,0.54) 100%),
    linear-gradient(180deg, rgba(0,0,0,0.24), rgba(0,0,0,0.78));
}

.template-hero-inner {
  position: relative;
  z-index: 2;
  min-height: 532px;
  display: flex;
  align-items: center;
}

.template-copy {
  width: min(620px, 100%);
  color: #fff;
  padding: 54px 0 126px;
}

.template-copy h1 {
  margin: 0;
  font-size: clamp(48px, 5.8vw, 78px);
  line-height: 0.98;
  letter-spacing: 0;
  font-weight: 950;
}

.template-copy h1 span {
  color: var(--brand);
}

.template-tagline {
  margin: 28px 0 0;
  padding-bottom: 15px;
  color: #fff;
  font-size: 26px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  position: relative;
}

.template-tagline::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 154px;
  height: 2px;
  background: var(--brand);
}

.template-desc {
  max-width: 500px;
  color: #e8edf1;
  font-size: 17px;
  margin: 24px 0 0;
}

.template-benefits {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  max-width: 520px;
  margin-top: 30px;
}

.template-benefits div {
  display: grid;
  place-items: center;
  gap: 8px;
  text-align: center;
  color: #fff;
  font-size: 12px;
  font-weight: 800;
}

.template-benefits i {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--brand);
  border-radius: 12px;
  color: var(--brand);
  font-size: 24px;
}

.stat-float {
  position: relative;
  z-index: 3;
  margin-top: -116px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-radius: 18px;
  overflow: hidden;
  background: linear-gradient(100deg, #4d1608, #ff4b10);
  box-shadow: 0 26px 42px rgba(0,0,0,0.28);
}

.stat-card {
  min-height: 116px;
  display: grid;
  grid-template-columns: 58px auto;
  grid-template-rows: auto auto;
  align-content: center;
  column-gap: 18px;
  padding: 22px 44px;
  color: #fff;
  border-right: 1px solid rgba(255,255,255,0.18);
}

.stat-card:last-child {
  border-right: 0;
}

.stat-card i {
  grid-row: 1 / 3;
  align-self: center;
  font-size: 52px;
}

.stat-card strong {
  font-size: 39px;
  line-height: 1;
}

.stat-card span {
  font-size: 14px;
  font-weight: 700;
}

.product-showcase {
  background: #fff;
  padding: 72px 0 56px;
}

.product-showcase-grid {
  display: grid;
  grid-template-columns: 330px 1fr;
  gap: 42px;
  align-items: center;
}

.orange-kicker {
  display: block;
  color: var(--brand);
  font-weight: 950;
  text-transform: uppercase;
  letter-spacing: 0;
  margin-bottom: 14px;
}

.showcase-title h2 {
  font-size: 42px;
  line-height: 1.12;
}

.outline-orange {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  margin-top: 28px;
  padding: 13px 24px;
  border: 1.5px solid var(--brand);
  color: var(--brand);
  border-radius: 999px;
  font-weight: 900;
}

.template-products {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.template-product-card {
  background: #f7f7f7;
  border: 1px solid #ececec;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 22px rgba(0,0,0,0.08);
  color: #111;
  display: grid;
  grid-template-columns: 1fr 34px;
  align-items: center;
  min-height: 238px;
}

.template-product-card strong {
  padding: 12px 0 15px 18px;
  font-size: 14px;
}

.template-product-card i {
  color: var(--brand);
  font-size: 20px;
}

.product-photo {
  grid-column: 1 / -1;
  height: 184px;
  background-image: url("../images/homepage-graphene-hero.png");
  background-size: 470%;
  background-repeat: no-repeat;
  background-color: #eee;
}

.product-photo.film { background-position: 70% 78%; }
.product-photo.heater { background-position: 54% 36%; }
.product-photo.panel { background-position: 77% 34%; }
.product-photo.mat { background-position: 88% 50%; }

.advantages-dark {
  position: relative;
  color: #fff;
  background:
    linear-gradient(90deg, rgba(0,0,0,0.86), rgba(0,0,0,0.88)),
    url("../images/homepage-graphene-hero.png") center/cover;
  padding: 78px 0;
}

.advantages-dark::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 18% 82%, rgba(255,75,16,0.34), transparent 35%);
}

.advantages-grid {
  position: relative;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 70px;
  align-items: center;
}

.advantages-grid h2 {
  font-size: 38px;
  max-width: 360px;
}

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

.advantage-list article {
  display: grid;
  grid-template-columns: 66px 1fr;
  gap: 18px;
  padding: 28px;
  border-left: 1px solid rgba(255,255,255,0.1);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.advantage-list i {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--brand);
  border-radius: 14px;
  color: var(--brand);
  font-size: 28px;
}

.advantage-list h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.advantage-list p {
  margin: 0;
  color: #d8dde2;
}

.solutions-strip {
  background: #f4f5f6;
}

.partner-band {
  padding: 34px 0 40px;
  background: #fff;
  text-align: center;
}

.partner-band h2 {
  text-transform: uppercase;
  font-size: 17px;
  color: #2b2b2b;
  margin-bottom: 24px;
}

.partner-logos {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 18px;
  align-items: center;
}

.partner-logos span {
  color: #777;
  font-weight: 950;
  font-size: 20px;
  filter: grayscale(1);
  opacity: 0.74;
}

.btn-secondary {
  color: var(--teal-dark);
  background: #e8f5f3;
  border-color: #bfe5df;
}

.btn-outline {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.hero {
  position: relative;
  min-height: 680px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: #eef4f5;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255,255,255,0.94) 0%, rgba(255,255,255,0.86) 42%, rgba(255,255,255,0.2) 72%);
  z-index: 1;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 690px;
  padding: 78px 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--teal-dark);
  background: #e8f5f3;
  border: 1px solid #bfe5df;
  border-radius: 999px;
  padding: 7px 12px;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

h1, h2, h3 {
  line-height: 1.12;
  margin: 0;
}

h1 {
  margin-top: 20px;
  font-size: clamp(38px, 6vw, 68px);
  max-width: 760px;
}

.hero p {
  margin: 18px 0 0;
  max-width: 620px;
  font-size: 19px;
  color: #40505e;
}

.hero-actions,
.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 34px;
}

.trust-item {
  background: rgba(255,255,255,0.84);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px;
  font-weight: 800;
  box-shadow: 0 8px 24px rgba(24,33,43,0.06);
}

section {
  padding: 84px 0;
}

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

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

.section-head h2 {
  font-size: clamp(30px, 4vw, 46px);
}

.section-head p {
  color: var(--muted);
  font-size: 18px;
  margin: 14px 0 0;
}

.soft {
  background: var(--soft);
}

.grid {
  display: grid;
  gap: 22px;
}

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

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

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

.grid-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 26px rgba(24,33,43,0.05);
}

.card h3 {
  font-size: 22px;
  margin-bottom: 10px;
}

.card p {
  color: var(--muted);
  margin: 0 0 16px;
}

.mini-img {
  min-height: 180px;
  border-radius: var(--radius);
  margin-bottom: 18px;
  background-image: url("../images/graphene-heating-hero.png");
  background-size: cover;
  background-position: center;
  border: 1px solid var(--line);
}

.mini-img.product-2 { background-position: 70% center; }
.mini-img.product-3 { background-position: 45% center; }
.mini-img.product-4 { background-position: 90% center; }

.list {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.list li {
  padding-left: 24px;
  position: relative;
  color: #40505e;
}

.list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand);
}

.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 38px;
  align-items: center;
}

.feature-band {
  background: var(--graphite);
  color: #fff;
}

.feature-band p,
.feature-band .list li {
  color: #d8e0e7;
}

.comparison {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.comparison th,
.comparison td {
  padding: 17px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.comparison th {
  background: var(--graphite);
  color: #fff;
}

.steps {
  counter-reset: step;
}

.step {
  position: relative;
  padding-left: 58px;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 24px;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--teal);
  font-weight: 800;
}

.cta {
  background: linear-gradient(135deg, var(--graphite), var(--teal-dark));
  color: #fff;
}

.cta p {
  color: #dbe6ea;
}

.rfq {
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
}

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

.form-field {
  display: grid;
  gap: 6px;
  font-size: 13px;
  font-weight: 800;
}

input, select, textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 13px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

textarea {
  min-height: 118px;
  resize: vertical;
}

.full {
  grid-column: 1 / -1;
}

.page-hero {
  padding: 84px 0;
  background: linear-gradient(135deg, #f6fafb, #edf4f3);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(36px, 5vw, 58px);
}

.breadcrumb {
  color: var(--teal-dark);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 14px;
}

.footer {
  background: #111820;
  color: #d6dde4;
  padding: 54px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 28px;
}

.footer h3,
.footer h4 {
  color: #fff;
  margin: 0 0 12px;
}

.footer a {
  display: block;
  margin: 8px 0;
  color: #d6dde4;
}

.footer-bottom {
  margin-top: 34px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.12);
  font-size: 14px;
}

.note {
  color: var(--muted);
  font-size: 13px;
  margin-top: 10px;
}

@media (max-width: 900px) {
  .topbar .container {
    flex-direction: column;
    gap: 4px;
  }

  .nav-toggle {
    display: block;
  }

  .nav {
    display: none;
    position: absolute;
    left: 16px;
    right: 16px;
    top: 74px;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
    flex-direction: column;
    align-items: flex-start;
  }

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

  .hero {
    min-height: 620px;
  }

  .hero::before {
    background: rgba(255,255,255,0.88);
  }

  .trust-strip,
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5,
  .split,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .dark-header {
    position: fixed;
  }

  .dark-menu {
    background: #080808;
  }

  .dark-menu a.active::after {
    display: none;
  }

  .template-hero {
    min-height: 760px;
  }

  .template-copy {
    padding-top: 68px;
    padding-bottom: 160px;
  }

  .template-benefits,
  .stat-float,
  .product-showcase-grid,
  .template-products,
  .advantages-grid,
  .advantage-list,
  .partner-logos {
    grid-template-columns: 1fr;
  }

  .stat-float {
    margin-top: -130px;
    border-radius: 14px;
  }

  .stat-card {
    border-right: 0;
    border-bottom: 1px solid rgba(255,255,255,0.18);
  }

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

  .product-showcase-grid {
    gap: 26px;
  }

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

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

@media (max-width: 560px) {
  .template-products {
    grid-template-columns: 1fr;
  }

  .template-copy h1 {
    font-size: 44px;
  }

  .template-tagline {
    font-size: 21px;
  }

  .stat-card {
    padding: 20px 26px;
  }
}