:root {
  --color-bg: #081019;
  --color-panel: #111b26;
  --color-panel-strong: #172635;
  --color-text: #eef5f7;
  --color-muted: #9aabb8;
  --color-line: rgba(255, 255, 255, 0.14);
  --color-red: #d61038;
  --color-cyan: #42d7df;
  --color-green: #52d681;
  --color-white: #ffffff;
  --max-width: 1180px;
  --header-height: 72px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

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

.site-header {
  position: fixed;
  z-index: 30;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 clamp(18px, 4vw, 48px);
  border-bottom: 1px solid transparent;
  background: rgba(8, 16, 25, 0.5);
  backdrop-filter: blur(16px);
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  border-color: var(--color-line);
  background: rgba(8, 16, 25, 0.9);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 18px;
  height: 18px;
  background: var(--color-red);
  clip-path: polygon(50% 0, 62% 24%, 90% 18%, 82% 48%, 100% 70%, 69% 74%, 50% 100%, 31% 74%, 0 70%, 18% 48%, 10% 18%, 38% 24%);
}

.site-nav {
  display: flex;
  gap: clamp(14px, 2.5vw, 34px);
  color: var(--color-muted);
  font-size: 0.92rem;
}

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

.text-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--color-cyan);
  font-weight: 800;
}

.text-link:hover {
  color: var(--color-white);
}

.header-action,
.primary-button,
.secondary-button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
}

.header-action,
.primary-button,
.contact-form button {
  color: var(--color-white);
  background: var(--color-red);
}

.contact-form button:disabled {
  cursor: wait;
  opacity: 0.68;
}

.secondary-button {
  border-color: rgba(255, 255, 255, 0.28);
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.08);
}

.hero-section {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: calc(var(--header-height) + 70px) clamp(18px, 4vw, 48px) 56px;
}

.hero-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(8, 16, 25, 0.96) 0%, rgba(8, 16, 25, 0.72) 42%, rgba(8, 16, 25, 0.28) 100%),
    linear-gradient(0deg, rgba(8, 16, 25, 0.95) 0%, rgba(8, 16, 25, 0) 44%);
  pointer-events: none;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.86) contrast(1.08);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--color-cyan);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  max-width: 850px;
  font-size: clamp(2.45rem, 5.2vw, 5.7rem);
  line-height: 0.98;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 3.4vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 1.25rem;
  line-height: 1.25;
}

.hero-copy {
  max-width: 680px;
  margin: 24px 0 0;
  color: #d0dde5;
  font-size: clamp(1rem, 1.6vw, 1.18rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  width: min(680px, 100%);
  margin: 42px 0 0;
}

.hero-metrics div {
  min-height: 112px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
}

.hero-metrics dt {
  color: var(--color-white);
  font-size: clamp(1.7rem, 3vw, 2.45rem);
  font-weight: 850;
  line-height: 1;
}

.hero-metrics dd {
  margin: 10px 0 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.trust-band {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  padding: 20px clamp(18px, 4vw, 48px);
  border-block: 1px solid var(--color-line);
  color: #d6e1e7;
  background: #0d1620;
}

.trust-band span {
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  font-size: 0.82rem;
}

.section,
.contact-section {
  width: min(var(--max-width), calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(260px, 0.55fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 36px;
}

.section-heading p:last-child {
  margin: 0;
  color: var(--color-muted);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

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

.product-card picture {
  display: block;
  aspect-ratio: 16 / 9;
  background: #dce3e6;
}

.product-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-body {
  padding: clamp(22px, 3vw, 32px);
}

.product-body p:not(.eyebrow),
.advantage-grid p,
.split-section p,
.application-grid p,
.contact-section p {
  color: var(--color-muted);
}

.feature-list {
  display: grid;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  position: relative;
  padding-left: 22px;
  color: #d7e3e8;
}

.feature-list li::before {
  content: "";
  position: absolute;
  top: 0.75em;
  left: 0;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-red);
}

.dark-section {
  width: 100%;
  max-width: none;
  padding-inline: max(18px, calc((100vw - var(--max-width)) / 2));
  background:
    linear-gradient(120deg, rgba(66, 215, 223, 0.12), transparent 38%),
    linear-gradient(270deg, rgba(214, 16, 56, 0.14), transparent 42%),
    #0b121b;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.advantage-grid article {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
}

.number {
  display: inline-block;
  margin-bottom: 26px;
  color: var(--color-green);
  font-size: 0.85rem;
  font-weight: 900;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: center;
}

.split-section picture {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: 8px;
}

.process-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.process-list span {
  padding: 8px 11px;
  border: 1px solid rgba(66, 215, 223, 0.28);
  border-radius: 5px;
  color: #c8f8fb;
  background: rgba(66, 215, 223, 0.08);
  font-size: 0.88rem;
}

.spec-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-panel);
}

table {
  width: 100%;
  min-width: 860px;
  border-collapse: collapse;
}

caption {
  padding: 18px 20px;
  color: var(--color-muted);
  text-align: left;
}

th,
td {
  padding: 18px 20px;
  border-top: 1px solid var(--color-line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--color-white);
  background: var(--color-panel-strong);
}

td {
  color: #d2dde4;
}

.seo-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.5fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.application-grid article {
  min-height: 220px;
  padding: 24px;
  border-left: 3px solid var(--color-red);
  background: #101b26;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(320px, 0.72fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid var(--color-line);
  border-radius: 8px;
  background: var(--color-panel);
}

.contact-form label {
  display: grid;
  gap: 7px;
  color: #d7e1e7;
  font-size: 0.9rem;
  font-weight: 700;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  padding: 12px 13px;
  color: var(--color-text);
  background: #08111a;
  font: inherit;
}

.contact-form textarea {
  resize: vertical;
}

.contact-note {
  margin: 0;
  font-size: 0.9rem;
}

.form-status {
  min-height: 22px;
  margin: 0;
  color: var(--color-cyan);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px;
  padding: 26px clamp(18px, 4vw, 48px);
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  background: #050b11;
  font-size: 0.88rem;
}

.site-footer p {
  margin: 0;
}

.product-page {
  padding-top: var(--header-height);
}

@media (max-width: 920px) {
  .site-nav {
    display: none;
  }

  .section-heading,
  .split-section,
  .seo-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 640px) {
  .header-action {
    display: none;
  }

  .hero-section {
    min-height: 860px;
    padding-top: 104px;
  }

  .hero-section::after {
    background:
      linear-gradient(180deg, rgba(8, 16, 25, 0.94) 0%, rgba(8, 16, 25, 0.8) 44%, rgba(8, 16, 25, 0.98) 100%);
  }

  .hero-media img {
    object-position: 58% center;
  }

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

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

  .section,
  .contact-section {
    width: min(100% - 28px, var(--max-width));
  }
}