:root {
  color-scheme: light;
  --ink: #0b1520;
  --muted: #60707f;
  --line: #dbe4eb;
  --paper: #f6f8fa;
  --white: #ffffff;
  --night: #07151d;
  --deep: #0d222c;
  --blue: #2a74ff;
  --cyan: #00a9bd;
  --silver: #d8e3ea;
  --gold: #d9a441;
  --shadow: 0 24px 80px rgba(11, 21, 32, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial,
    sans-serif;
  line-height: 1.6;
}

body::selection {
  background: rgba(0, 169, 189, 0.22);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
  padding: 0 clamp(20px, 4vw, 48px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(5, 14, 26, 0.84);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.26);
}

.brand {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  flex: 0 0 auto;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
}

.brand img {
  display: block;
  width: auto;
  height: 38px;
  max-width: min(180px, 36vw);
  background: transparent;
  filter: drop-shadow(0 1px 6px rgba(255, 255, 255, 0.08));
  object-fit: contain;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1 1 auto;
  gap: clamp(18px, 2vw, 34px);
  white-space: nowrap;
}

.nav-link {
  position: relative;
  padding: 10px 2px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav-link::after {
  position: absolute;
  right: 0;
  bottom: 2px;
  left: 0;
  height: 2px;
  border-radius: 999px;
  content: "";
  background: linear-gradient(90deg, #00d5ff, #7cf7ff);
  opacity: 0;
  transform: scaleX(0);
  transform-origin: center;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.nav-link,
.nav-cta,
.mobile-menu summary,
.mobile-nav a {
  transition:
    color 180ms ease,
    border-color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
}

.nav-link:hover::after,
.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-actions {
  position: relative;
  display: flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 12px;
}

.nav-cta {
  padding: 11px 18px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 999px;
  color: #02131f;
  background: linear-gradient(135deg, #6ff4ff, #00bfd8);
  box-shadow: 0 0 24px rgba(0, 213, 255, 0.25);
  font-size: 15px;
  font-weight: 800;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0, 213, 255, 0.38);
}

.mobile-menu {
  position: relative;
  display: none;
}

.mobile-menu summary {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.86);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
  list-style: none;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-menu summary:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.13);
}

.mobile-nav {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  display: grid;
  min-width: 220px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: rgba(5, 14, 26, 0.94);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.35);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.mobile-nav a {
  padding: 11px 12px;
  border-radius: 10px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
  font-weight: 700;
}

.mobile-nav a:hover {
  color: #ffffff;
  background: rgba(0, 213, 255, 0.12);
}

.section-band {
  position: relative;
  overflow: hidden;
}

section[id] {
  scroll-margin-top: 96px;
}

.section-inner {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.opening-video-section {
  width: 100%;
  overflow: hidden;
  background: #061626;
}

.opening-video-shell {
  width: 100%;
  max-width: none;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #061626;
}

.opening-video {
  display: block;
  width: min(100vw, 1920px);
  height: auto;
  opacity: 1;
  filter: none;
  transform: none;
  image-rendering: auto;
  object-fit: contain;
  object-position: center center;
}

.hero {
  position: relative;
  min-height: auto;
  overflow: hidden;
  color: var(--white);
  background:
    radial-gradient(circle at 84% 76%, rgba(217, 164, 65, 0.14), transparent 30%),
    radial-gradient(circle at 15% 20%, rgba(42, 116, 255, 0.2), transparent 26%),
    linear-gradient(120deg, #07151d 0%, #0b2530 52%, #10271f 100%);
}

.hero::after {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(7, 21, 29, 0.34), transparent 48%, rgba(7, 21, 29, 0.3)),
    linear-gradient(180deg, rgba(7, 21, 29, 0), rgba(246, 248, 250, 0.05));
  pointer-events: none;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: 1;
  opacity: 0.66;
}

.signal-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(90deg, transparent, black 14%, black 86%, transparent);
}

.sensor-map {
  position: absolute;
  inset: 0;
}

.node,
.track {
  position: absolute;
  display: block;
}

.node {
  width: 13px;
  height: 13px;
  border: 2px solid rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 12px rgba(0, 169, 189, 0.14), 0 0 36px rgba(0, 169, 189, 0.9);
}

.node-a {
  top: 24%;
  left: 58%;
}

.node-b {
  top: 49%;
  left: 78%;
  background: var(--gold);
  box-shadow: 0 0 0 12px rgba(217, 164, 65, 0.15), 0 0 36px rgba(217, 164, 65, 0.8);
}

.node-c {
  top: 72%;
  left: 62%;
  background: #77c9a4;
  box-shadow: 0 0 0 12px rgba(119, 201, 164, 0.15), 0 0 36px rgba(119, 201, 164, 0.8);
}

.node-d {
  top: 38%;
  left: 36%;
  background: var(--blue);
  box-shadow: 0 0 0 12px rgba(42, 116, 255, 0.14), 0 0 36px rgba(42, 116, 255, 0.78);
}

.track {
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.08), rgba(0, 169, 189, 0.85), rgba(255, 255, 255, 0.08));
}

.track-one {
  top: 31%;
  left: 37%;
  width: 32vw;
  transform: rotate(13deg);
}

.track-two {
  top: 53%;
  left: 58%;
  width: 24vw;
  transform: rotate(-22deg);
}

.track-three {
  top: 69%;
  left: 40%;
  width: 24vw;
  transform: rotate(6deg);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 410px;
  align-items: center;
  gap: clamp(32px, 6vw, 96px);
  min-height: auto;
  padding: 96px 0 88px;
}

.hero-copy {
  max-width: 790px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.hero h1 {
  max-width: 820px;
  margin-bottom: 24px;
  font-size: clamp(54px, 7vw, 104px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero h1 span {
  display: block;
}

.lede {
  max-width: 760px;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.78;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.2;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    background 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  border: 1px solid var(--cyan);
  color: #021014;
  background: var(--cyan);
}

.button.secondary {
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.button.light {
  border-color: rgba(11, 21, 32, 0.12);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.78);
}

.hero-panel {
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(7, 21, 29, 0.58);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.25);
  backdrop-filter: blur(20px);
}

.panel-heading {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 24px;
}

.panel-heading span {
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.panel-heading strong {
  max-width: 180px;
  font-size: 20px;
  line-height: 1.25;
  text-align: right;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
}

.metric-grid div {
  min-height: 118px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.metric-grid dt {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.metric-grid dd {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.84);
  font-size: 15px;
}

.listening-layer,
.data-section,
.ai-engine,
.scenarios,
.contact {
  padding: clamp(76px, 9vw, 136px) 0;
}

.listening-layer {
  background: var(--white);
}

.split,
.contact-inner,
.ai-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(0, 1fr);
  gap: clamp(28px, 6vw, 88px);
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(32px, 3.7vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  font-size: 24px;
  line-height: 1.18;
  letter-spacing: 0;
}

.body-copy p,
.section-heading p,
.scenario-list p,
.data-grid p,
.proof-video-copy p,
.video-copy p,
.contact p {
  color: var(--muted);
  font-size: 17px;
}

.body-copy p {
  margin-bottom: 16px;
}

.data-section {
  background: #edf4f6;
}

.section-heading {
  max-width: 800px;
  margin-bottom: 38px;
}

.section-heading.compact {
  max-width: 980px;
}

.data-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.data-grid article {
  min-height: 210px;
  padding: 24px;
  border: 1px solid rgba(11, 21, 32, 0.09);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
}

.data-grid span {
  display: inline-block;
  margin-bottom: 40px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.data-grid strong {
  display: block;
  margin-bottom: 12px;
  font-size: 22px;
}

.ai-engine {
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(216, 227, 234, 0.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(216, 227, 234, 0.06) 1px, transparent 1px),
    linear-gradient(135deg, #081821, #102935 58%, #17271e);
  background-size: 42px 42px, 42px 42px, auto;
}

.ai-engine .section-heading p {
  color: rgba(255, 255, 255, 0.7);
}

.engine-stack {
  display: grid;
  gap: 10px;
}

.engine-stack div {
  padding: 18px 20px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(0, 169, 189, 0.14), rgba(255, 255, 255, 0.05));
  color: rgba(255, 255, 255, 0.88);
  font-size: 18px;
  font-weight: 900;
}

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

.scenario-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.scenario-list article {
  min-height: 300px;
  padding: clamp(22px, 3vw, 34px);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.scenario-list article:nth-child(1),
.scenario-list article:nth-child(2),
.scenario-list article:nth-child(3) {
  grid-column: span 2;
}

.scenario-list article:nth-child(4),
.scenario-list article:nth-child(5) {
  grid-column: span 3;
}

.scenario-media {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  margin: 0 0 24px;
  border: 1px solid rgba(11, 21, 32, 0.1);
  border-radius: 8px;
  background: #edf4f6;
}

.scenario-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.traffic-media {
  background:
    linear-gradient(90deg, rgba(0, 169, 189, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0, 169, 189, 0.08) 1px, transparent 1px),
    linear-gradient(135deg, #0d222c, #183842);
  background-size: 34px 34px, 34px 34px, auto;
}

.traffic-media.warm {
  background:
    linear-gradient(90deg, rgba(217, 164, 65, 0.1) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0, 169, 189, 0.07) 1px, transparent 1px),
    linear-gradient(135deg, #10222b, #1d2f2a);
  background-size: 34px 34px, 34px 34px, auto;
}

.traffic-media span {
  position: absolute;
  display: block;
  height: 3px;
  border-radius: 999px;
  background: rgba(0, 169, 189, 0.82);
  box-shadow: 0 0 20px rgba(0, 169, 189, 0.4);
}

.traffic-media span:nth-child(1) {
  top: 34%;
  left: 12%;
  width: 68%;
  transform: rotate(13deg);
}

.traffic-media span:nth-child(2) {
  top: 55%;
  right: 10%;
  width: 56%;
  transform: rotate(-18deg);
}

.traffic-media span:nth-child(3) {
  bottom: 26%;
  left: 24%;
  width: 48%;
  background: rgba(217, 164, 65, 0.9);
  transform: rotate(4deg);
}

.scenario-list h3 {
  margin-bottom: 16px;
}

.proof-strip {
  padding: 26px 0;
  color: var(--white);
  background: var(--ink);
}

.strip-inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.strip-inner span {
  display: grid;
  min-height: 92px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 900;
}

.field-proof {
  padding: clamp(76px, 9vw, 136px) 0;
  color: var(--white);
  background:
    radial-gradient(circle at 70% 20%, rgba(217, 164, 65, 0.12), transparent 30%),
    linear-gradient(90deg, rgba(0, 169, 189, 0.08) 1px, transparent 1px),
    linear-gradient(0deg, rgba(0, 169, 189, 0.08) 1px, transparent 1px),
    linear-gradient(135deg, #07151d, #0c242d 60%, #111f19);
  background-size: auto, 42px 42px, 42px 42px, auto;
}

.field-proof .section-heading p,
.field-proof .proof-video-copy p,
.field-proof .video-copy p {
  color: rgba(255, 255, 255, 0.68);
}

.proof-video-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.proof-video-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.proof-video-card video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background: #000000;
}

.proof-video-copy {
  padding: 20px;
}

.proof-video-copy h3 {
  margin-bottom: 12px;
  color: var(--white);
  font-size: 24px;
}

.proof-video-copy p {
  margin-bottom: 0;
}

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

.video-card {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, rgba(0, 169, 189, 0.16), rgba(217, 164, 65, 0.1)),
    #0b151b;
}

.video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-missing {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: end;
  gap: 6px;
  padding: 20px;
  background:
    repeating-linear-gradient(
      -35deg,
      rgba(255, 255, 255, 0.05) 0,
      rgba(255, 255, 255, 0.05) 1px,
      transparent 1px,
      transparent 16px
    ),
    rgba(7, 21, 29, 0.82);
}

.video-missing[hidden],
.video-frame[data-state="ready"] .video-missing {
  display: none;
}

.video-missing strong {
  font-size: 16px;
}

.video-missing span {
  overflow-wrap: anywhere;
  color: rgba(255, 255, 255, 0.64);
  font-size: 12px;
}

.video-copy {
  padding: 20px;
}

.video-copy span {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.video-copy h3 {
  margin-bottom: 12px;
  color: var(--white);
  font-size: 24px;
}

.contact {
  background:
    linear-gradient(135deg, rgba(0, 169, 189, 0.08), transparent 36%),
    var(--white);
}

.contact-actions {
  align-content: start;
  padding-top: 8px;
}

.site-footer {
  padding: 24px 0;
  color: rgba(255, 255, 255, 0.72);
  background: var(--night);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-inner p {
  margin: 0;
  font-size: 14px;
}

.footer-inner a {
  color: var(--white);
  font-size: 14px;
  font-weight: 900;
}

@media (max-width: 1120px) {
  .site-header {
    gap: 16px;
    padding: 0 24px;
  }

  .main-nav {
    gap: 14px;
  }

  .brand img {
    height: 36px;
  }

  .nav-link {
    font-size: 14px;
  }
}

@media (max-width: 980px) {
  .main-nav {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .hero-inner,
  .split,
  .contact-inner,
  .ai-inner {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    align-items: center;
    padding-top: 110px;
  }

  .hero-panel {
    max-width: 620px;
  }

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

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

  .scenario-list article,
  .scenario-list article:nth-child(1),
  .scenario-list article:nth-child(2),
  .scenario-list article:nth-child(3),
  .scenario-list article:nth-child(4),
  .scenario-list article:nth-child(5) {
    grid-column: span 1;
  }
}

@media (max-width: 680px) {
  .site-header {
    min-height: 66px;
    gap: 10px;
    padding: 0 14px;
  }

  .brand {
    padding: 0;
  }

  .brand img {
    height: 32px;
    max-width: 130px;
  }

  .nav-cta {
    padding: 10px 13px;
    font-size: 14px;
  }

  .mobile-menu summary {
    min-height: 39px;
    padding: 8px 11px;
  }

  .mobile-nav {
    right: -2px;
    min-width: min(220px, calc(100vw - 28px));
  }

  .section-inner {
    width: min(100% - 28px, 1180px);
  }

  .opening-video {
    height: auto;
  }

  section[id] {
    scroll-margin-top: 132px;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    min-height: auto;
    padding: 72px 0 56px;
  }

  .hero h1 {
    font-size: 50px;
    line-height: 1.02;
  }

  .metric-grid,
  .data-grid,
  .proof-video-grid,
  .video-grid,
  .scenario-list,
  .strip-inner {
    grid-template-columns: 1fr;
  }

  .data-grid article {
    min-height: 180px;
  }

  .data-grid span {
    margin-bottom: 24px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}