:root {
  --ink: #07111f;
  --ink-soft: #172437;
  --paper: #f5f8fb;
  --paper-blue: #eaf3f8;
  --white: #ffffff;
  --cyan: #32d4ff;
  --blue: #1678d3;
  --blue-deep: #0756a4;
  --line: rgba(8, 34, 60, 0.14);
  --line-light: rgba(255, 255, 255, 0.16);
  --muted: #67768a;
  --shell: min(1180px, calc(100vw - 48px));
  --shadow: 0 24px 80px rgba(1, 13, 27, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

body.nav-open {
  overflow: hidden;
}

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

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

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

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

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

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

.site-header {
  position: fixed;
  z-index: 100;
  top: 0;
  right: 0;
  left: 0;
  color: var(--white);
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.site-header.scrolled {
  background: rgba(4, 15, 28, 0.9);
  border-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
  backdrop-filter: blur(18px);
}

.header-inner {
  display: flex;
  min-height: 86px;
  align-items: center;
  justify-content: space-between;
}

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

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--ink);
  background: linear-gradient(145deg, var(--cyan), #9feaff 58%, var(--blue));
  border-radius: 50% 50% 50% 8px;
  box-shadow: 0 0 32px rgba(50, 212, 255, 0.3);
  font-family: Arial, sans-serif;
  font-size: 21px;
  font-weight: 800;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-copy strong {
  font-size: 18px;
  letter-spacing: 0.12em;
}

.brand-copy span {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.62);
  font: 10px/1 Arial, sans-serif;
  letter-spacing: 0.24em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
  font-size: 14px;
}

.site-nav a {
  position: relative;
  padding-block: 10px;
  color: rgba(255, 255, 255, 0.78);
  transition: color 180ms ease;
}

.site-nav a:not(.nav-contact)::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 1px;
  background: var(--cyan);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

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

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-contact {
  padding: 9px 18px !important;
  color: var(--white) !important;
  border: 1px solid rgba(255, 255, 255, 0.34);
  border-radius: 999px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 0;
  color: var(--white);
  background: transparent;
}

.nav-toggle span {
  display: block;
  height: 1px;
  margin: 6px 0;
  background: currentColor;
  transition: transform 180ms ease, opacity 180ms ease;
}

.hero {
  position: relative;
  min-height: 100svh;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 70% 40%, rgba(8, 124, 195, 0.35), transparent 33%),
    linear-gradient(135deg, #030911 0%, #071729 58%, #04101e 100%);
}

.hero::before {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 28%, rgba(50, 212, 255, 0.13), transparent 24%),
    radial-gradient(circle at 84% 12%, rgba(26, 110, 201, 0.18), transparent 22%);
  content: "";
}

.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.16;
  background-image:
    linear-gradient(rgba(93, 184, 236, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(93, 184, 236, 0.18) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, transparent, black 20%, transparent 92%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  min-height: 100svh;
  align-items: center;
  gap: 6vw;
  grid-template-columns: minmax(0, 0.9fr) minmax(440px, 1.1fr);
  padding-block: 130px 100px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.24em;
  text-transform: uppercase;
}

.eyebrow.dark {
  color: var(--blue-deep);
}

.hero h1 {
  margin: 0;
  font-size: clamp(46px, 6vw, 82px);
  font-weight: 700;
  letter-spacing: -0.06em;
  line-height: 1.12;
}

.hero h1 span {
  color: transparent;
  background: linear-gradient(100deg, var(--white), #7bdcff);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-lead {
  max-width: 610px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: clamp(17px, 1.5vw, 20px);
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-width: 136px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  font-size: 14px;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

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

.button-primary {
  color: var(--ink);
  background: var(--cyan);
}

.button-ghost {
  color: var(--white);
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.hero-visual {
  position: relative;
  min-height: 520px;
  align-self: center;
}

.hero-visual::before {
  position: absolute;
  z-index: 0;
  top: 3%;
  right: 4%;
  width: 64%;
  aspect-ratio: 1;
  border: 1px solid rgba(102, 215, 255, 0.22);
  border-radius: 50%;
  box-shadow:
    0 0 0 38px rgba(75, 200, 255, 0.035),
    0 0 0 76px rgba(75, 200, 255, 0.025);
  content: "";
}

.hero-visual img {
  position: absolute;
  z-index: 1;
  right: -5%;
  bottom: 10%;
  width: 105%;
  border-radius: 50% 50% 3% 3%;
  filter: saturate(1.05) contrast(1.08);
  mask-image: linear-gradient(to bottom, transparent 2%, black 24%, black 84%, transparent 100%);
}

.signal-node {
  position: absolute;
  z-index: 3;
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 1px solid rgba(102, 223, 255, 0.55);
  border-radius: 50%;
  color: var(--white);
  background: rgba(5, 23, 40, 0.76);
  box-shadow: 0 0 42px rgba(50, 212, 255, 0.25);
  font: 700 12px/1 Arial, sans-serif;
}

.signal-node::before,
.signal-node::after {
  position: absolute;
  border: 1px solid rgba(50, 212, 255, 0.18);
  border-radius: 50%;
  content: "";
}

.signal-node::before { inset: -13px; }
.signal-node::after { inset: -26px; }
.signal-node-a { top: 18%; left: 16%; }
.signal-node-b { right: 10%; bottom: 30%; }

.hero-readout {
  position: absolute;
  z-index: 4;
  right: 0;
  bottom: 2%;
  display: flex;
  gap: 24px;
  color: rgba(255, 255, 255, 0.56);
  font: 10px/1 Arial, sans-serif;
  letter-spacing: 0.16em;
}

.hero-orbit {
  position: absolute;
  border: 1px solid rgba(79, 203, 255, 0.1);
  border-radius: 50%;
}

.hero-orbit-one {
  top: 20%;
  right: -18%;
  width: 70vw;
  height: 40vw;
  transform: rotate(-18deg);
}

.hero-orbit-two {
  top: 30%;
  right: -9%;
  width: 58vw;
  height: 32vw;
  transform: rotate(-18deg);
}

.scroll-cue {
  position: absolute;
  z-index: 5;
  bottom: 26px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.42);
  font: 9px/1 Arial, sans-serif;
  letter-spacing: 0.22em;
  transform: translateX(-50%);
}

.scroll-cue i {
  display: block;
  width: 34px;
  height: 1px;
  background: currentColor;
}

.section {
  padding-block: 120px;
}

.about-section {
  background: var(--white);
}

.about-grid {
  display: grid;
  gap: 10vw;
  grid-template-columns: minmax(300px, 0.85fr) minmax(0, 1.15fr);
}

.section-heading h2,
.technology-title h2 {
  margin: 0;
  font-size: clamp(36px, 4.5vw, 60px);
  letter-spacing: -0.05em;
  line-height: 1.22;
}

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

.lead-copy {
  margin-top: 0;
  color: var(--ink-soft);
  font-size: clamp(20px, 2.1vw, 28px);
  line-height: 1.6;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.about-tags span {
  padding: 7px 15px;
  color: var(--blue-deep);
  background: var(--paper-blue);
  border: 1px solid rgba(12, 95, 165, 0.1);
  border-radius: 999px;
  font-size: 13px;
}

.product-index {
  color: var(--white);
  background: var(--blue-deep);
}

.product-index-inner {
  display: grid;
  min-height: 120px;
  align-items: center;
  gap: 30px;
  grid-template-columns: 0.55fr 1fr 1fr;
}

.product-index p {
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
  letter-spacing: 0.2em;
}

.product-index a {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 18px;
}

.product-index a span {
  color: var(--cyan);
  font: 12px/1 Arial, sans-serif;
}

.wifi-section {
  background: var(--paper);
}

.product-intro {
  display: grid;
  align-items: start;
  gap: 38px;
  grid-template-columns: 80px minmax(290px, 0.9fr) minmax(360px, 1.1fr);
  margin-bottom: 76px;
}

.product-number {
  color: var(--blue);
  font: 700 14px/1 Arial, sans-serif;
}

.product-title h2 {
  margin: 0;
  font-size: clamp(38px, 5vw, 66px);
  letter-spacing: -0.055em;
  line-height: 1.1;
}

.product-summary {
  margin: 0;
  padding-top: 4px;
  color: var(--muted);
  font-size: 18px;
}

.feature-grid {
  display: grid;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
  grid-template-columns: repeat(3, 1fr);
}

.feature-card {
  min-height: 220px;
  padding: 28px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: color 220ms ease, background 220ms ease, transform 220ms ease;
}

.feature-card:hover {
  color: var(--white);
  background: var(--blue-deep);
  transform: translateY(-4px);
}

.feature-card > span {
  color: var(--blue);
  font: 11px/1 Arial, sans-serif;
}

.feature-card:hover > span {
  color: var(--cyan);
}

.feature-card h3 {
  margin: 42px 0 8px;
  font-size: 22px;
}

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

.feature-card:hover p {
  color: rgba(255, 255, 255, 0.64);
}

.split-panel {
  display: grid;
  align-items: center;
  gap: 8vw;
  grid-template-columns: 0.75fr 1.25fr;
  margin-top: 110px;
}

.split-copy h3,
.spec-figure h3,
.scenario-heading h3,
.software-copy h3,
.gallery-heading h3 {
  margin: 0;
  font-size: clamp(28px, 3.4vw, 44px);
  letter-spacing: -0.04em;
  line-height: 1.25;
}

.split-copy > p:not(.eyebrow),
.spec-figure > div > p:not(.eyebrow) {
  color: var(--muted);
}

.line-list {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.line-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}

.line-list li::before {
  margin-right: 12px;
  color: var(--blue);
  content: "—";
}

.media-frame {
  margin: 0;
  padding: 42px 34px 18px;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.media-frame figcaption {
  margin-top: 18px;
  color: var(--muted);
  font-size: 12px;
}

.spec-figure {
  display: grid;
  align-items: center;
  gap: 5vw;
  grid-template-columns: 0.55fr 1.45fr;
  margin-top: 110px;
}

.spec-figure > a {
  position: relative;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.spec-figure > a span {
  position: absolute;
  right: 14px;
  bottom: 12px;
  padding: 4px 10px;
  color: var(--white);
  background: rgba(4, 20, 36, 0.82);
  font-size: 11px;
}

.scenario-block {
  margin-top: 120px;
}

.scenario-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 36px;
}

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

.scenario-card {
  position: relative;
  min-height: 360px;
  margin: 0;
  overflow: hidden;
  background: var(--ink);
}

.scenario-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.08);
  transition: transform 500ms ease, filter 300ms ease;
}

.scenario-card::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(2, 12, 22, 0.92), transparent 62%);
  content: "";
}

.scenario-card:hover img {
  filter: saturate(1) contrast(1.03);
  transform: scale(1.04);
}

.scenario-card figcaption {
  position: absolute;
  z-index: 1;
  right: 22px;
  bottom: 20px;
  left: 22px;
  display: flex;
  flex-direction: column;
  color: var(--white);
}

.scenario-card figcaption span {
  color: rgba(255, 255, 255, 0.56);
  font-size: 12px;
}

.starlink-section {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: #030b15;
}

.starlink-section::before {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(21, 116, 192, 0.18), transparent 28%),
    radial-gradient(circle at 80% 66%, rgba(33, 195, 237, 0.1), transparent 25%);
  content: "";
}

.starfield {
  position: absolute;
  inset: 0;
  opacity: 0.26;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.8) 0 1px, transparent 1.4px),
    radial-gradient(circle, rgba(93, 206, 255, 0.55) 0 1px, transparent 1.5px);
  background-position: 0 0, 48px 72px;
  background-size: 126px 126px, 182px 182px;
}

.starlink-section .shell {
  position: relative;
  z-index: 1;
}

.product-intro.light .product-summary {
  color: rgba(255, 255, 255, 0.6);
}

.product-intro.light .product-number {
  color: var(--cyan);
}

.star-product {
  display: grid;
  align-items: center;
  gap: 8vw;
  grid-template-columns: 0.95fr 1.05fr;
  padding-block: 100px;
  border-top: 1px solid var(--line-light);
}

.star-copy h3 {
  margin: 0;
  font-size: clamp(34px, 4.5vw, 58px);
  letter-spacing: -0.05em;
  line-height: 1.18;
}

.star-copy > p:not(.product-kicker, .model) {
  color: rgba(255, 255, 255, 0.62);
}

.product-kicker {
  margin: 0 0 18px;
  color: var(--cyan);
  font: 700 11px/1 Arial, sans-serif;
  letter-spacing: 0.2em;
}

.model {
  margin: 10px 0 26px;
  color: rgba(255, 255, 255, 0.4);
  font: 14px/1 Arial, sans-serif;
  letter-spacing: 0.16em;
}

.spec-grid {
  display: grid;
  gap: 1px;
  margin-top: 36px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
  grid-template-columns: repeat(3, 1fr);
}

.spec-grid div {
  display: flex;
  min-height: 96px;
  flex-direction: column;
  justify-content: center;
  padding: 16px;
  background: rgba(5, 17, 30, 0.86);
}

.spec-grid strong {
  color: var(--white);
  font-size: 18px;
  line-height: 1.25;
}

.spec-grid span {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.42);
  font-size: 11px;
}

.device-composition {
  position: relative;
  min-height: 520px;
}

.device-composition::before {
  position: absolute;
  top: 10%;
  right: 12%;
  width: 72%;
  aspect-ratio: 1;
  border: 1px solid rgba(50, 212, 255, 0.18);
  border-radius: 50%;
  box-shadow: 0 0 0 45px rgba(50, 212, 255, 0.025);
  content: "";
}

.device-main,
.device-secondary {
  position: absolute;
  z-index: 2;
  width: 48%;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.36);
}

.device-main { top: 4%; left: 4%; }
.device-secondary { top: 21%; right: 5%; }
.device-field {
  position: absolute;
  z-index: 3;
  bottom: 0;
  left: 16%;
  width: 28%;
  border: 5px solid #071321;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.software-showcase {
  display: grid;
  align-items: end;
  gap: 18px;
  grid-template-columns: 0.78fr 1.22fr;
  padding-block: 100px;
  border-top: 1px solid var(--line-light);
}

.software-copy {
  padding-right: 5vw;
}

.software-copy p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.55);
}

.software-shot {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-light);
  box-shadow: var(--shadow);
}

.software-shot-wide {
  grid-row: span 2;
}

.downlink-product {
  grid-template-columns: 1.05fr 0.95fr;
}

.device-stage {
  position: relative;
  display: grid;
  min-height: 500px;
  place-items: center;
}

.device-stage::after {
  position: absolute;
  right: 10%;
  bottom: 11%;
  left: 10%;
  height: 30px;
  background: rgba(35, 172, 223, 0.24);
  border-radius: 50%;
  filter: blur(24px);
  content: "";
}

.device-stage img {
  position: relative;
  z-index: 2;
  width: 88%;
  filter: drop-shadow(0 28px 35px rgba(0, 0, 0, 0.5));
}

.orbit-lines,
.orbit-lines::before,
.orbit-lines::after {
  position: absolute;
  border: 1px solid rgba(50, 212, 255, 0.14);
  border-radius: 50%;
  content: "";
}

.orbit-lines { inset: 8%; }
.orbit-lines::before { inset: 11%; }
.orbit-lines::after { inset: 22%; }

.downlink-gallery {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, 1fr);
  padding-top: 100px;
  border-top: 1px solid var(--line-light);
}

.gallery-heading {
  display: flex;
  flex-direction: column;
  justify-content: end;
  padding: 30px 7vw 30px 0;
}

.downlink-gallery figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-light);
}

.downlink-gallery figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-large {
  grid-column: 2;
  grid-row: span 2;
}

.technology-section {
  background: var(--white);
}

.technology-grid {
  display: grid;
  gap: 10vw;
  grid-template-columns: 0.85fr 1.15fr;
}

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

.technology-list li {
  display: grid;
  gap: 28px;
  grid-template-columns: 48px 1fr;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.technology-list > li > span {
  color: var(--blue);
  font: 11px/1 Arial, sans-serif;
}

.technology-list h3 {
  margin: 0;
  font-size: 24px;
}

.technology-list p {
  margin: 8px 0 0;
  color: var(--muted);
}

.contact-section {
  position: relative;
  overflow: hidden;
  padding-block: 110px;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 50%, rgba(50, 212, 255, 0.17), transparent 26%),
    #0757a5;
}

.contact-section::before {
  position: absolute;
  top: -55%;
  right: -5%;
  width: 58vw;
  aspect-ratio: 1;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50%;
  box-shadow:
    0 0 0 70px rgba(255, 255, 255, 0.025),
    0 0 0 140px rgba(255, 255, 255, 0.018);
  content: "";
}

.contact-inner {
  position: relative;
  display: grid;
  align-items: center;
  gap: 12vw;
  grid-template-columns: 1fr 0.9fr;
}

.contact-copy h2 {
  margin: 0;
  font-size: clamp(42px, 5vw, 68px);
  letter-spacing: -0.06em;
  line-height: 1.15;
}

.contact-copy p:not(.eyebrow) {
  max-width: 520px;
  color: rgba(255, 255, 255, 0.66);
}

.contact-card {
  padding: 38px;
  background: rgba(3, 25, 50, 0.38);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(12px);
}

.contact-card > p {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 13px;
}

.contact-card > strong {
  font-size: 22px;
}

.contact-card dl {
  margin: 30px 0 0;
}

.contact-card dl div {
  display: grid;
  gap: 16px;
  grid-template-columns: 88px 1fr;
  padding: 13px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}

.contact-card dt {
  color: rgba(255, 255, 255, 0.45);
  font-size: 12px;
}

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

.contact-card address {
  font-style: normal;
}

.contact-card dd a:hover,
.contact-card dd a:focus-visible {
  color: var(--cyan);
}

.site-footer {
  color: rgba(255, 255, 255, 0.54);
  background: #020812;
}

.footer-inner {
  display: grid;
  min-height: 130px;
  align-items: center;
  gap: 30px;
  grid-template-columns: 1fr auto 1fr;
}

.footer-brand .brand-mark {
  width: 34px;
  height: 34px;
  font-size: 17px;
}

.footer-brand .brand-copy strong {
  color: var(--white);
  font-size: 15px;
}

.footer-inner p {
  font-size: 12px;
}

.footer-inner > a {
  justify-self: end;
  font-size: 12px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1000px) {
  :root { --shell: min(100% - 36px, 860px); }
  .site-nav { gap: 20px; }
  .hero-inner { gap: 24px; grid-template-columns: 1fr 0.9fr; }
  .hero-visual { min-height: 420px; }
  .about-grid,
  .technology-grid { gap: 60px; }
  .product-intro { grid-template-columns: 48px 1fr; }
  .product-summary { grid-column: 2; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .star-product { gap: 50px; }
  .spec-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 760px) {
  :root { --shell: calc(100vw - 32px); }
  .section { padding-block: 82px; }
  .header-inner { min-height: 70px; }
  .nav-toggle { display: block; position: relative; z-index: 2; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: 90px 32px 40px;
    background: rgba(2, 11, 21, 0.98);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-12px);
    transition: opacity 180ms ease, transform 180ms ease;
  }
  .site-nav.open { opacity: 1; pointer-events: auto; transform: translateY(0); }
  .site-nav a { font-size: 24px; }
  .nav-contact { margin-top: 10px; font-size: 16px !important; }
  .hero-inner { display: block; padding-top: 125px; }
  .hero h1 { font-size: clamp(43px, 13vw, 64px); }
  .hero-visual { min-height: 360px; margin-top: 50px; }
  .hero-visual img { right: -18%; width: 128%; }
  .signal-node-a { top: 14%; left: 18%; }
  .hero-readout { display: none; }
  .scroll-cue { display: none; }
  .about-grid,
  .technology-grid,
  .split-panel,
  .spec-figure,
  .contact-inner { grid-template-columns: 1fr; }
  .about-grid,
  .technology-grid { gap: 42px; }
  .product-index-inner { grid-template-columns: 1fr; gap: 8px; padding-block: 28px; }
  .product-index p { margin: 0 0 8px; }
  .product-index a { padding: 8px 0; }
  .product-intro { gap: 20px; grid-template-columns: 36px 1fr; margin-bottom: 54px; }
  .product-summary { font-size: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 180px; }
  .feature-card h3 { margin-top: 28px; }
  .split-panel,
  .spec-figure { gap: 40px; margin-top: 78px; }
  .spec-figure > div { max-width: 580px; }
  .scenario-block { margin-top: 84px; }
  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .scenario-card { min-height: 270px; }
  .star-product,
  .downlink-product { grid-template-columns: 1fr; gap: 48px; padding-block: 78px; }
  .downlink-product .device-stage { order: 2; }
  .device-composition { min-height: 460px; }
  .software-showcase { grid-template-columns: 1fr; padding-block: 78px; }
  .software-shot-wide { grid-row: auto; }
  .downlink-gallery { grid-template-columns: 1fr; padding-top: 78px; }
  .gallery-large { grid-column: auto; grid-row: auto; }
  .contact-section { padding-block: 84px; }
  .contact-inner { gap: 50px; }
  .footer-inner { grid-template-columns: 1fr; gap: 16px; padding-block: 30px; }
  .footer-inner p { margin: 0; }
  .footer-inner > a { justify-self: start; }
}

@media (max-width: 480px) {
  .brand-copy strong { font-size: 16px; }
  .hero-actions { align-items: stretch; flex-direction: column; }
  .button { width: 100%; }
  .hero-visual { min-height: 310px; }
  .signal-node { width: 50px; height: 50px; }
  .scenario-grid { grid-template-columns: 1fr; }
  .scenario-card { min-height: 330px; }
  .spec-grid { grid-template-columns: 1fr 1fr; }
  .spec-grid strong { font-size: 15px; }
  .device-composition { min-height: 390px; }
  .device-main,
  .device-secondary { width: 53%; }
  .device-field { width: 32%; }
  .device-stage { min-height: 350px; }
  .contact-card { padding: 26px; }
  .contact-card dl div { grid-template-columns: 1fr; gap: 2px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}