:root {
  --brand-blue: #0754a0;
  --brand-blue-deep: #043e89;
  --navy: #041f45;
  --navy-soft: #0b2c58;
  --orange: #f47718;
  --orange-hover: #dc6100;
  --ink: #101827;
  --muted: #5c6676;
  --line: #d9e1ea;
  --soft: #f3f6fa;
  --white: #ffffff;
  --container: 1180px;
  --shadow: 0 18px 50px rgb(4 31 69 / 10%);
  --header-height: 78px;
  color-scheme: light;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-size: 16px;
  line-height: 1.65;
}

body.nav-open {
  overflow: hidden;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
}

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

button,
.button,
.site-nav a,
.text-link {
  font: inherit;
}

:focus-visible {
  outline: 3px solid rgb(244 119 24 / 45%);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 12px;
  z-index: 1000;
  padding: 10px 16px;
  color: var(--white);
  background: var(--navy);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: var(--header-height);
  border-bottom: 1px solid rgb(16 24 39 / 10%);
  background: rgb(255 255 255 / 96%);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: var(--header-height);
  display: grid;
  grid-template-columns: 220px 1fr auto;
  align-items: center;
  gap: 28px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  width: 202px;
}

.brand-logo,
.footer-logo {
  width: 100%;
  height: auto;
}

.site-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 2.7vw, 38px);
}

.site-nav a {
  position: relative;
  color: #263246;
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  letter-spacing: 0.01em;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -8px;
  height: 2px;
  background: var(--orange);
  transition: right 180ms ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  right: 0;
}

.nav-toggle {
  display: none;
}

.button {
  min-height: 56px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 14px 22px;
  border: 1px solid var(--orange);
  border-radius: 5px;
  color: #111827;
  background: var(--orange);
  box-shadow: 0 12px 30px rgb(244 119 24 / 22%);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.2;
  text-decoration: none;
  transition: background 180ms ease, border-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  border-color: var(--orange-hover);
  background: var(--orange-hover);
  box-shadow: 0 14px 34px rgb(220 97 0 / 25%);
  transform: translateY(-2px);
}

.button svg,
.text-link svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.button-icon {
  width: 23px !important;
  height: 23px !important;
}

.button-small {
  min-height: 44px;
  padding: 11px 17px;
  font-size: 14px;
}

.button-light {
  color: var(--navy);
  background: var(--white);
  border-color: var(--white);
  box-shadow: none;
}

.button-light:hover {
  color: var(--white);
  background: transparent;
  border-color: var(--white);
}

.hero {
  min-height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  padding: clamp(64px, 8vw, 108px) 0 68px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(500px, 1.1fr);
  align-items: center;
  gap: clamp(52px, 7vw, 96px);
}

.hero h1 {
  max-width: 680px;
  margin: 0;
  font-size: clamp(48px, 5.4vw, 76px);
  font-weight: 820;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

.hero-subtitle {
  max-width: 610px;
  margin: 28px 0 30px;
  color: #334155;
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 500;
  line-height: 1.35;
}

.spec-rail {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0 0 34px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.spec-rail div {
  min-width: 0;
  padding: 0 14px;
  border-right: 1px solid var(--line);
}

.spec-rail div:first-child {
  padding-left: 0;
}

.spec-rail div:last-child {
  padding-right: 0;
  border-right: 0;
}

.spec-rail dt {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.spec-rail dd {
  margin: 0;
  font-size: clamp(17px, 1.6vw, 21px);
  font-weight: 800;
  white-space: nowrap;
}

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

.hero-actions p {
  flex: 1 1 220px;
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.technical-media {
  position: relative;
  min-height: 500px;
  overflow: hidden;
  border: 1px solid #aab5c3;
  background-color: var(--white);
  background-image:
    linear-gradient(rgb(4 62 137 / 8%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(4 62 137 / 8%) 1px, transparent 1px);
  background-size: 42px 42px;
  box-shadow: var(--shadow);
}

.technical-media::before {
  content: "";
  position: absolute;
  inset: 72px;
  border: 1px solid #7c8797;
}

.media-ruler {
  position: absolute;
  opacity: 0.45;
}

.media-ruler-top {
  top: 15px;
  left: 50px;
  right: 24px;
  height: 10px;
  background: repeating-linear-gradient(90deg, #334155 0 1px, transparent 1px 12px);
}

.media-ruler-left {
  top: 50px;
  bottom: 48px;
  left: 15px;
  width: 10px;
  background: repeating-linear-gradient(#334155 0 1px, transparent 1px 12px);
}

.corner {
  position: absolute;
  z-index: 1;
  width: 24px;
  height: 24px;
  border-color: var(--ink);
}

.corner-tl { top: 93px; left: 93px; border-top: 2px solid; border-left: 2px solid; }
.corner-tr { top: 93px; right: 93px; border-top: 2px solid; border-right: 2px solid; }
.corner-bl { bottom: 93px; left: 93px; border-bottom: 2px solid; border-left: 2px solid; }
.corner-br { right: 93px; bottom: 93px; border-right: 2px solid; border-bottom: 2px solid; }

.media-center {
  position: absolute;
  inset: 50% auto auto 50%;
  width: min(72%, 430px);
  text-align: center;
  transform: translate(-50%, -56%);
}

.media-center strong,
.media-center span {
  display: block;
}

.media-center strong {
  margin: 12px 0;
  font-size: clamp(20px, 2vw, 28px);
  line-height: 1.1;
  text-transform: uppercase;
}

.media-center span:last-child {
  color: var(--muted);
  font-size: 13px;
}

.media-index {
  color: var(--brand-blue);
  font-family: "Courier New", monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.technical-media figcaption {
  position: absolute;
  right: 22px;
  bottom: 18px;
  left: 22px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.4;
}

.technical-media.has-photo::before {
  z-index: 2;
  border-color: rgb(4 62 137 / 38%);
}

.product-hero-image {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  padding: 34px 58px 62px;
  object-fit: contain;
  background: linear-gradient(145deg, #f5f8fb, #dbe6f0);
}

.technical-media.has-photo .media-ruler,
.technical-media.has-photo .corner,
.technical-media.has-photo figcaption {
  z-index: 3;
}

.technical-media.has-photo figcaption {
  padding: 10px 12px;
  color: var(--navy);
  background: rgb(255 255 255 / 90%);
}

.section {
  padding: clamp(84px, 10vw, 136px) 0;
}

.section-heading {
  max-width: 760px;
}

.section-number {
  display: block;
  margin-bottom: 12px;
  color: var(--orange);
  font-family: "Courier New", monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.section-heading h2,
.photo-intro h2,
.contact h2 {
  margin: 0;
  font-size: clamp(38px, 4vw, 58px);
  font-weight: 790;
  letter-spacing: -0.045em;
  line-height: 1.02;
}

.section-heading > p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.overview {
  background: var(--white);
}

.overview-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 34px 90px;
}

.overview-copy {
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.lead {
  margin: 0 0 24px;
  font-size: clamp(22px, 2.4vw, 32px);
  font-weight: 530;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.overview-copy > p:last-child,
.application-copy > p:last-child {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 17px;
}

.overview-points {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 38px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.overview-points > div {
  padding: 32px 34px 34px;
  border-right: 1px solid var(--line);
}

.overview-points > div:first-child {
  padding-left: 0;
}

.overview-points > div:last-child {
  padding-right: 0;
  border-right: 0;
}

.overview-points span,
.process-rail span,
.requirement-list span {
  color: var(--brand-blue);
  font-family: "Courier New", monospace;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.overview-points h3 {
  margin: 12px 0 8px;
  font-size: 19px;
  line-height: 1.25;
}

.overview-points p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.specifications,
.media-section {
  color: var(--white);
  background: var(--navy);
}

.section-heading-light > p {
  color: #cbd9eb;
}

.parameter-layout {
  display: grid;
  grid-template-columns: 1.45fr 0.55fr;
  gap: 64px;
  margin-top: 60px;
}

.parameter-table {
  border-top: 1px solid rgb(255 255 255 / 28%);
}

.parameter-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: center;
  min-height: 72px;
  border-bottom: 1px solid rgb(255 255 255 / 18%);
}

.parameter-row span {
  color: #b9c9dd;
}

.parameter-row strong {
  font-size: 22px;
}

.parameter-head {
  min-height: 46px;
  color: #8ea6c4;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.parameter-note {
  align-self: start;
  padding: 28px 0 0 32px;
  border-top: 3px solid var(--orange);
}

.parameter-note span {
  color: var(--orange);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.parameter-note p {
  margin: 18px 0 0;
  color: #d2deed;
}

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

.application-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 34px 90px;
}

.application-copy {
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.process-rail {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 0;
  margin: 46px 0 0;
  list-style: none;
  counter-reset: stage;
  border-top: 1px solid #aeb9c8;
}

.process-rail li {
  position: relative;
  padding: 34px 42px 0 0;
}

.process-rail li::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
}

.process-rail strong {
  display: block;
  margin: 10px 0 8px;
  font-size: 19px;
}

.process-rail p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.media-heading {
  max-width: 780px;
}

.video-stage {
  min-height: 360px;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 36px;
  margin-top: 52px;
  padding: 54px;
  border: 1px solid rgb(255 255 255 / 24%);
  background-image:
    linear-gradient(rgb(255 255 255 / 5%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 5%) 1px, transparent 1px);
  background-size: 48px 48px;
}

.video-stage-real {
  grid-template-columns: minmax(220px, 310px) 1fr;
  margin: 52px 0 0;
  padding: 30px;
}

.video-stage-real video {
  width: 100%;
  max-width: 310px;
  max-height: 560px;
  display: block;
  justify-self: center;
  aspect-ratio: 9 / 16;
  object-fit: contain;
  background: #020b17;
}

.video-stage-real figcaption {
  min-width: 0;
}

.video-symbol {
  width: 112px;
  height: 112px;
  display: grid;
  place-items: center;
  border: 1px solid var(--orange);
  border-radius: 50%;
  color: var(--orange);
}

.video-symbol svg {
  width: 48px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linejoin: round;
}

.video-stage > div:last-child {
  min-width: 0;
}

.video-stage span,
.photo-code {
  display: block;
  color: var(--orange);
  font-family: "Courier New", monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.video-stage strong {
  display: block;
  margin: 12px 0;
  font-size: clamp(23px, 3vw, 38px);
  line-height: 1.15;
  overflow-wrap: anywhere;
}

.video-stage p {
  max-width: 680px;
  margin: 0;
  color: #bdcce0;
}

.photo-intro {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 30px;
  margin-top: 100px;
}

.photo-intro h2 {
  max-width: 640px;
}

.photo-intro p {
  max-width: 410px;
  margin: 0;
  color: #bdcce0;
}

.photo-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 38px;
}

.photo-slot {
  position: relative;
  min-height: 340px;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 22%);
  background-color: var(--navy-soft);
  background-image:
    linear-gradient(rgb(255 255 255 / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 4%) 1px, transparent 1px);
  background-size: 36px 36px;
}

.photo-code {
  position: absolute;
  top: 20px;
  left: 20px;
}

.photo-cross {
  position: absolute;
  inset: 50% auto auto 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -80%);
}

.photo-cross::before,
.photo-cross::after {
  content: "";
  position: absolute;
  background: rgb(255 255 255 / 48%);
}

.photo-cross::before {
  top: 21px;
  left: 0;
  width: 44px;
  height: 1px;
}

.photo-cross::after {
  top: 0;
  left: 21px;
  width: 1px;
  height: 44px;
}

.photo-slot figcaption {
  position: absolute;
  right: 20px;
  bottom: 20px;
  left: 20px;
  padding-top: 18px;
  border-top: 1px solid rgb(255 255 255 / 22%);
}

.photo-slot.has-photo::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 38% 0 0;
  background: linear-gradient(transparent, rgb(2 18 41 / 94%));
  pointer-events: none;
}

.photo-slot.has-photo > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.photo-slot.has-photo .photo-code,
.photo-slot.has-photo figcaption {
  z-index: 2;
}

.photo-slot.has-photo .photo-code {
  padding: 6px 8px;
  background: rgb(2 18 41 / 78%);
}

.photo-slot strong,
.photo-slot span {
  display: block;
}

.photo-slot strong {
  font-size: 17px;
}

.photo-slot figcaption span {
  margin-top: 4px;
  color: #aebed3;
  font-size: 11px;
}

.choose-grid {
  display: grid;
  grid-template-columns: 0.6fr 1.4fr;
  gap: 50px 90px;
}

.requirement-list {
  padding: 0;
  margin: 0;
  list-style: none;
  border-top: 1px solid var(--ink);
}

.requirement-list li {
  display: grid;
  grid-template-columns: 44px minmax(170px, 0.75fr) 1fr;
  gap: 16px;
  align-items: center;
  min-height: 78px;
  border-bottom: 1px solid var(--line);
}

.requirement-list strong {
  font-size: 18px;
}

.requirement-list p {
  margin: 0;
  color: var(--muted);
}

.text-link {
  grid-column: 2;
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--orange);
  color: var(--brand-blue-deep);
  font-size: 17px;
  font-weight: 800;
  text-decoration: none;
}

.faq {
  border-top: 1px solid var(--line);
  background: var(--soft);
}

.faq-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 70px;
}

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

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  position: relative;
  padding: 24px 54px 24px 0;
  cursor: pointer;
  font-size: 18px;
  font-weight: 750;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::before,
.faq-list summary::after {
  content: "";
  position: absolute;
  top: 50%;
  right: 8px;
  width: 16px;
  height: 2px;
  background: var(--brand-blue);
  transition: transform 160ms ease;
}

.faq-list summary::after {
  transform: rotate(90deg);
}

.faq-list details[open] summary::after {
  transform: rotate(0deg);
}

.faq-list details p {
  max-width: 720px;
  margin: -6px 54px 24px 0;
  color: var(--muted);
}

.contact {
  padding: clamp(80px, 9vw, 124px) 0;
  color: var(--white);
  background: var(--brand-blue-deep);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 90px;
  align-items: center;
}

.contact-label {
  display: block;
  margin-bottom: 18px;
  color: #bcd4f3;
  font-size: 13px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.contact h2 {
  max-width: 760px;
}

.contact p {
  max-width: 680px;
  margin: 24px 0 0;
  color: #d7e4f4;
  font-size: 18px;
}

.contact-actions {
  padding-left: 40px;
  border-left: 1px solid rgb(255 255 255 / 28%);
}

.contact-actions dl {
  margin: 26px 0 0;
}

.contact-actions dl > div {
  padding: 14px 0;
  border-top: 1px solid rgb(255 255 255 / 18%);
}

.contact-actions dt {
  color: #9fb9db;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.contact-actions dd {
  margin: 4px 0 0;
  font-size: 13px;
}

.contact-actions dd a,
.footer-contact a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.contact-actions dd a:hover,
.contact-actions dd a:focus-visible,
.footer-contact a:hover,
.footer-contact a:focus-visible {
  color: #fff;
}

.site-footer {
  padding: 56px 0;
  color: #d4deea;
  background: #020f22;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 36px 70px;
  align-items: start;
}

.footer-logo {
  width: 230px;
}

.footer-grid > div:first-child p {
  margin: 14px 0 0;
  color: #9eafc4;
}

.footer-contact {
  display: grid;
  gap: 6px;
  text-align: right;
  font-size: 14px;
}

.footer-note {
  grid-column: 1 / -1;
  max-width: 930px;
  margin: 0;
  padding-top: 24px;
  border-top: 1px solid rgb(255 255 255 / 15%);
  color: #8598b0;
  font-size: 12px;
}

.contact-notice {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 200;
  width: min(390px, calc(100% - 44px));
  padding: 22px 46px 22px 22px;
  border-left: 4px solid var(--orange);
  color: var(--white);
  background: var(--navy);
  box-shadow: 0 18px 55px rgb(0 0 0 / 28%);
}

.contact-notice[hidden] {
  display: none;
}

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

.contact-notice span {
  margin-top: 7px;
  color: #c9d6e7;
  font-size: 13px;
}

.contact-notice button {
  position: absolute;
  top: 10px;
  right: 12px;
  border: 0;
  color: var(--white);
  background: transparent;
  cursor: pointer;
  font-size: 25px;
  line-height: 1;
}

@media (max-width: 1040px) {
  .header-inner {
    grid-template-columns: 190px 1fr auto;
    gap: 18px;
  }

  .brand-link {
    width: 184px;
  }

  .site-nav {
    gap: 18px;
  }

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

  .hero-copy {
    max-width: 820px;
  }

  .technical-media {
    min-height: 480px;
  }
}

@media (max-width: 820px) {
  :root {
    --header-height: 70px;
  }

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

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

  .brand-link {
    width: 170px;
  }

  .header-cta {
    display: none;
  }

  .nav-toggle {
    width: 44px;
    height: 44px;
    display: grid;
    place-content: center;
    gap: 7px;
    padding: 0;
    border: 1px solid var(--line);
    border-radius: 4px;
    color: var(--ink);
    background: var(--white);
  }

  .nav-toggle span:not(.sr-only) {
    width: 20px;
    height: 2px;
    display: block;
    background: currentColor;
    transition: transform 180ms ease;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) {
    transform: translateY(4.5px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-4.5px) rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: grid;
    gap: 0;
    padding: 18px 16px 28px;
    border-bottom: 1px solid var(--line);
    background: var(--white);
    box-shadow: 0 20px 35px rgb(4 31 69 / 12%);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 13px 8px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

  .site-nav a::after {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 62px;
  }

  .hero h1 {
    font-size: clamp(44px, 12vw, 68px);
  }

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

  .spec-rail div {
    padding: 14px 18px;
    border-bottom: 1px solid var(--line);
  }

  .spec-rail div:nth-child(2) {
    border-right: 0;
  }

  .spec-rail div:nth-child(3) {
    padding-left: 0;
    border-bottom: 0;
  }

  .spec-rail div:nth-child(4) {
    border-right: 0;
    border-bottom: 0;
  }

  .technical-media {
    min-height: 430px;
  }

  .technical-media::before {
    inset: 58px;
  }

  .corner-tl { top: 76px; left: 76px; }
  .corner-tr { top: 76px; right: 76px; }
  .corner-bl { bottom: 76px; left: 76px; }
  .corner-br { right: 76px; bottom: 76px; }

  .overview-grid,
  .application-grid,
  .choose-grid,
  .faq-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .overview-copy,
  .application-copy {
    margin-top: 8px;
  }

  .overview-points,
  .process-rail,
  .photo-rail {
    grid-template-columns: 1fr;
  }

  .overview-points > div,
  .overview-points > div:first-child,
  .overview-points > div:last-child {
    padding: 26px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .overview-points > div:last-child {
    border-bottom: 0;
  }

  .parameter-layout {
    grid-template-columns: 1fr;
  }

  .parameter-note {
    padding-left: 0;
  }

  .process-rail li {
    padding: 28px 0 28px 34px;
    border-bottom: 1px solid var(--line);
  }

  .process-rail li::before {
    top: 37px;
  }

  .video-stage {
    grid-template-columns: 1fr;
    padding: 38px 28px;
  }

  .video-stage-real video {
    max-width: 300px;
  }

  .photo-intro {
    align-items: start;
    flex-direction: column;
  }

  .photo-slot {
    min-height: 300px;
  }

  .text-link {
    grid-column: 1;
  }

  .contact-actions {
    padding: 32px 0 0;
    border-top: 1px solid rgb(255 255 255 / 28%);
    border-left: 0;
  }

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

  .footer-contact {
    text-align: left;
  }
}

@media (max-width: 520px) {
  body {
    font-size: 15px;
  }

  .hero h1 {
    font-size: clamp(40px, 12.5vw, 58px);
  }

  .hero-subtitle {
    font-size: 20px;
  }

  .button {
    width: 100%;
  }

  .hero-actions {
    align-items: stretch;
  }

  .technical-media {
    min-height: 360px;
  }

  .product-hero-image {
    padding: 24px 34px 64px;
  }

  .technical-media::before {
    inset: 44px 30px 62px;
  }

  .corner-tl { top: 62px; left: 48px; }
  .corner-tr { top: 62px; right: 48px; }
  .corner-bl { bottom: 80px; left: 48px; }
  .corner-br { right: 48px; bottom: 80px; }

  .media-center {
    width: 74%;
  }

  .section {
    padding: 78px 0;
  }

  .section-heading h2,
  .photo-intro h2,
  .contact h2 {
    font-size: 38px;
  }

  .parameter-row {
    grid-template-columns: 0.9fr 1.1fr;
  }

  .video-symbol {
    width: 88px;
    height: 88px;
  }

  .requirement-list li {
    grid-template-columns: 38px 1fr;
    gap: 10px;
    padding: 18px 0;
  }

  .requirement-list p {
    grid-column: 2;
  }

  .faq-list summary {
    font-size: 17px;
  }

  .contact-notice {
    right: 16px;
    bottom: 16px;
    width: calc(100% - 32px);
  }
}

.product-page .hero {
  padding: 48px 0 56px;
}

.product-page .hero h1 {
  font-size: clamp(38px, 4.4vw, 60px);
  line-height: 1.04;
}

.product-page .hero-subtitle {
  margin: 20px 0 24px;
}

.product-page .hero .spec-rail {
  margin-bottom: 0;
}

.product-page .power-options {
  margin: 24px 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--soft);
}

.product-page .power-options h2 {
  margin: 0 0 14px;
  color: var(--brand-blue-deep);
  font-size: 18px;
}

.power-options-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.power-options h3 {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.4;
}

.power-options p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.product-page .inquiry-jump {
  margin-top: 18px;
  font-size: 14px;
}

.contact-actions .quote-prompts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0 0 26px;
}

.contact-actions .quote-prompts > div {
  display: block;
}

.contact-actions .quote-prompts dt {
  color: var(--white);
  font-weight: 700;
}

.contact-actions .quote-prompts dd,
.contact-actions .quote-hint {
  margin: 4px 0 0;
  font-size: 14px;
  line-height: 1.55;
}

.contact-actions .quote-hint {
  margin-top: 16px;
}

@media (max-width: 520px) {
  .power-options-grid,
  .contact-actions .quote-prompts {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}