:root {
  color-scheme: dark;
  --ink: #eef7ff;
  --muted: rgba(226, 241, 255, 0.72);
  --faint: rgba(226, 241, 255, 0.52);
  --line: rgba(170, 218, 255, 0.18);
  --line-strong: rgba(185, 224, 255, 0.34);
  --blue: #4db8ff;
  --blue-deep: #0b3d78;
  --copper: #c98642;
  --deep: #040a12;
  --panel: rgba(5, 16, 28, 0.68);
  --panel-soft: rgba(8, 31, 52, 0.38);
  --glass: rgba(10, 37, 60, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--deep);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Microsoft YaHei", sans-serif;
}

img,
video {
  max-width: 100%;
}

.video-stage {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background:
    radial-gradient(circle at 72% 40%, rgba(49, 157, 255, 0.23), transparent 30%),
    radial-gradient(circle at 15% 72%, rgba(201, 134, 66, 0.1), transparent 24%),
    linear-gradient(135deg, #061424 0%, #02070d 58%, #071a2a 100%);
  z-index: 0;
}

.background-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.02);
}

.video-vignette {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(2, 7, 13, 0.76), rgba(2, 7, 13, 0.2) 42%, rgba(2, 7, 13, 0.5)),
    linear-gradient(180deg, rgba(2, 7, 13, 0.28), transparent 34%, rgba(2, 7, 13, 0.68)),
    radial-gradient(circle at 18% 40%, rgba(42, 151, 255, 0.14), transparent 32%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.026) 0 1px, transparent 1px 92px),
    linear-gradient(90deg, rgba(2, 7, 13, 0.24), transparent 38%, rgba(2, 7, 13, 0.18)),
    radial-gradient(circle at 16% 50%, rgba(14, 83, 140, 0.15), transparent 34%);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px clamp(20px, 5vw, 72px);
  color: var(--ink);
  background: linear-gradient(180deg, rgba(2, 7, 13, 0.78), rgba(2, 7, 13, 0.18) 72%, transparent);
  backdrop-filter: blur(14px);
}

.brand,
.nav a {
  color: inherit;
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 750;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(177, 220, 255, 0.36);
  background:
    linear-gradient(135deg, rgba(77, 184, 255, 0.24), rgba(201, 134, 66, 0.12)),
    rgba(14, 43, 68, 0.5);
  box-shadow: inset 0 0 18px rgba(77, 184, 255, 0.18);
}

.nav {
  display: flex;
  gap: 8px;
  font-size: 14px;
  color: rgba(238, 247, 255, 0.78);
}

.nav a {
  padding: 9px 11px;
  border: 1px solid transparent;
}

.nav a:hover {
  border-color: rgba(155, 213, 255, 0.24);
  background: rgba(7, 28, 48, 0.44);
}

main {
  position: relative;
  z-index: 2;
}

.hero-section,
.section,
.liquid-footer {
  padding-inline: clamp(20px, 5vw, 72px);
}

.hero-section {
  min-height: 112vh;
  display: grid;
  align-content: center;
  gap: 34px;
  padding-top: 110px;
}

.hero-copy,
.section-copy {
  max-width: 720px;
}

.eyebrow {
  margin: 0 0 18px;
  color: #87d2ff;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 28px;
  height: 1px;
  margin-right: 10px;
  vertical-align: middle;
  background: linear-gradient(90deg, var(--copper), var(--blue));
}

h1,
h2 {
  margin: 0;
  font-weight: 780;
  line-height: 0.98;
  letter-spacing: 0;
}

h1 {
  max-width: 11.6ch;
  font-size: clamp(48px, 7.6vw, 104px);
}

h2 {
  max-width: 13ch;
  font-size: clamp(34px, 5vw, 68px);
}

.lead,
.section-copy p,
.liquid-footer p {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(16px, 1.38vw, 20px);
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button,
.contact-form button {
  min-height: 46px;
  border: 1px solid rgba(178, 222, 255, 0.34);
  padding: 12px 20px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 750;
  background: rgba(10, 33, 55, 0.48);
  backdrop-filter: blur(18px);
  cursor: pointer;
  transition:
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.button.primary,
.contact-form button {
  border-color: rgba(88, 190, 255, 0.72);
  background: linear-gradient(135deg, rgba(50, 145, 225, 0.92), rgba(9, 58, 113, 0.92));
  box-shadow: 0 18px 54px rgba(34, 147, 255, 0.24);
}

.button:hover,
.contact-form button:hover {
  transform: translateY(-1px);
  border-color: rgba(207, 237, 255, 0.64);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 180px));
  gap: 12px;
  max-width: 620px;
}

.hero-metrics span,
.feature-grid article,
.product-row article,
.application-list span {
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.055), transparent 38%),
    var(--panel);
  backdrop-filter: blur(22px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08);
}

.hero-metrics span {
  padding: 18px;
  color: var(--faint);
}

.hero-metrics b {
  display: block;
  margin-bottom: 8px;
  color: #ffffff;
  font-size: 26px;
}

.scroll-cue {
  position: absolute;
  left: clamp(20px, 5vw, 72px);
  bottom: 34px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: rgba(226, 241, 255, 0.56);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.scroll-cue span {
  width: 1px;
  height: 48px;
  background: linear-gradient(transparent, #87d2ff, transparent);
}

.scroll-cue em {
  font-style: normal;
}

.proof-strip {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-inline: clamp(20px, 5vw, 72px);
  border: 1px solid rgba(168, 218, 255, 0.2);
  background: rgba(168, 218, 255, 0.16);
  backdrop-filter: blur(24px);
}

.proof-strip article {
  min-height: 190px;
  padding: clamp(18px, 2.5vw, 28px);
  background:
    linear-gradient(180deg, rgba(12, 45, 74, 0.66), rgba(4, 14, 24, 0.74)),
    rgba(4, 14, 24, 0.74);
}

.proof-strip span {
  color: var(--copper);
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.14em;
}

.proof-strip strong {
  display: block;
  margin-top: 26px;
  color: #fff;
  font-size: 24px;
}

.proof-strip p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.68;
}

.section {
  min-height: 100vh;
  display: grid;
  align-content: center;
  gap: clamp(26px, 5vw, 72px);
  padding-block: clamp(110px, 13vw, 170px);
  position: relative;
}

.section::before {
  content: "";
  position: absolute;
  left: clamp(20px, 5vw, 72px);
  right: clamp(20px, 5vw, 72px);
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(154, 216, 255, 0.28), transparent);
}

.performance-section {
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.9fr);
  align-items: center;
}

.feature-grid {
  display: grid;
  gap: 14px;
}

.feature-grid article {
  position: relative;
  padding: 24px;
  overflow: hidden;
}

.feature-grid article::after {
  content: "";
  position: absolute;
  top: 22px;
  right: 22px;
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--copper), var(--blue));
}

.feature-grid span,
.product-row span {
  color: #83d2ff;
  font-size: 12px;
  font-weight: 850;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.feature-grid strong,
.product-row strong {
  display: block;
  margin-top: 10px;
  color: #ffffff;
  font-size: 22px;
}

.feature-grid p,
.product-row p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.image-feature {
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.85fr);
  align-items: center;
}

.image-feature.reverse {
  grid-template-columns: minmax(320px, 0.85fr) minmax(0, 1.1fr);
}

.media-panel {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(192, 225, 255, 0.22);
  background: rgba(4, 15, 26, 0.56);
  box-shadow:
    0 32px 90px rgba(0, 8, 18, 0.52),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.media-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.16), transparent 30%),
    radial-gradient(circle at 78% 24%, rgba(77, 184, 255, 0.16), transparent 28%);
}

.media-panel img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.media-panel figcaption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 2;
  border: 1px solid rgba(210, 238, 255, 0.24);
  padding: 8px 10px;
  color: rgba(238, 247, 255, 0.78);
  background: rgba(3, 13, 23, 0.54);
  backdrop-filter: blur(14px);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.media-panel.wide img {
  aspect-ratio: 16 / 10;
}

.detail-list {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
}

.detail-list div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.detail-list dt {
  color: #ffffff;
  font-weight: 800;
}

.detail-list dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.62;
}

.range-section {
  align-content: start;
  padding-top: clamp(120px, 14vw, 180px);
}

.section-copy.centered {
  max-width: 820px;
  margin-inline: auto;
  text-align: center;
}

.section-copy.centered h2,
.section-copy.centered p {
  margin-inline: auto;
}

.product-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.product-row article {
  position: relative;
  overflow: hidden;
  padding: 0 0 24px;
}

.product-row img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  margin-bottom: 20px;
  filter: saturate(0.98) contrast(1.04);
}

.product-row span,
.product-row strong,
.product-row p {
  padding-inline: 8px;
}

.product-row span,
.product-row strong,
.product-row p {
  display: block;
  padding-inline: 20px;
}

.applications-section {
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1fr);
  align-items: center;
}

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

.application-list span {
  min-height: 96px;
  display: grid;
  align-content: end;
  gap: 8px;
  padding: 20px;
  color: #ffffff;
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 760;
}

.application-list b {
  color: var(--copper);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.liquid-footer {
  position: relative;
  min-height: 112vh;
  display: grid;
  align-items: end;
  padding-block: 18vh 8vh;
  overflow: hidden;
}

.footer-liquid-image {
  position: absolute;
  inset: auto 0 0;
  width: 100%;
  height: 72%;
  object-fit: cover;
  opacity: 0.82;
  filter: saturate(1.08) contrast(1.03);
}

.liquid-footer::before,
.liquid-footer::after {
  content: "";
  position: absolute;
  inset: auto -10% -24% -10%;
  height: 58%;
  background:
    radial-gradient(circle at 20% 36%, rgba(113, 220, 255, 0.44), transparent 24%),
    radial-gradient(circle at 68% 22%, rgba(255, 255, 255, 0.24), transparent 20%),
    linear-gradient(135deg, rgba(31, 116, 185, 0.28), rgba(215, 245, 255, 0.12));
  filter: blur(18px);
  transform: skewY(-4deg);
  animation: liquidDrift 10s ease-in-out infinite alternate;
}

.liquid-footer::after {
  inset: auto -18% -32% -5%;
  height: 48%;
  opacity: 0.62;
  filter: blur(28px);
  animation-duration: 14s;
  animation-direction: alternate-reverse;
}

.glass-shell {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(28px, 5vw, 80px);
  align-items: center;
  border: 1px solid rgba(213, 242, 255, 0.38);
  padding: clamp(24px, 5vw, 62px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.18), rgba(55, 167, 255, 0.08) 42%, rgba(201, 134, 66, 0.08)),
    var(--glass);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.35),
    0 32px 90px rgba(0, 8, 18, 0.62);
  backdrop-filter: blur(30px) saturate(142%);
}

.glass-shell h2 {
  max-width: 14ch;
}

.contact-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.contact-meta span {
  border: 1px solid rgba(218, 242, 255, 0.22);
  padding: 10px 12px;
  color: rgba(238, 247, 255, 0.78);
  background: rgba(1, 12, 22, 0.24);
}

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

.contact-form label {
  display: grid;
  gap: 8px;
  color: rgba(238, 247, 255, 0.68);
  font-size: 13px;
}

.contact-form input {
  width: 100%;
  min-height: 48px;
  border: 1px solid rgba(218, 242, 255, 0.28);
  border-radius: 0;
  padding: 0 14px;
  background: rgba(1, 12, 22, 0.34);
  color: var(--ink);
  outline: none;
}

.scroll-meter {
  position: fixed;
  right: 24px;
  top: 50%;
  z-index: 20;
  width: 2px;
  height: 150px;
  transform: translateY(-50%);
  background: rgba(209, 236, 255, 0.16);
}

.scroll-meter span {
  display: block;
  width: 100%;
  height: var(--progress, 0%);
  background: linear-gradient(#ffffff, #4db8ff);
}

@keyframes liquidDrift {
  from {
    transform: translate3d(-3%, 1%, 0) skewY(-4deg) scale(1);
  }
  to {
    transform: translate3d(4%, -4%, 0) skewY(3deg) scale(1.06);
  }
}

@media (max-width: 980px) {
  .performance-section,
  .image-feature,
  .image-feature.reverse,
  .applications-section,
  .glass-shell {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 760px) {
  .site-header {
    padding: 18px 20px;
  }

  .nav {
    display: none;
  }

  .hero-section,
  .section,
  .liquid-footer {
    padding-inline: 20px;
  }

  .hero-section {
    min-height: 105vh;
  }

  h1,
  h2 {
    max-width: 10.5ch;
  }

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

  .detail-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .scroll-meter {
    display: none;
  }
}