:root {
  --bg: #050607;
  --panel: #0d1012;
  --panel-2: #141719;
  --text: #f7f9fa;
  --muted: #a8b0b5;
  --line: rgba(255, 255, 255, 0.13);
  --line-strong: rgba(255, 255, 255, 0.24);
  --cyan: #7ce8ff;
  --mint: #80ffc4;
  --gold: #d8c590;
  --danger: #ff5c5c;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    "Noto Sans SC",
    "PingFang SC",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
  letter-spacing: 0;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 48px);
  color: rgba(255, 255, 255, 0.88);
  transition:
    background 180ms ease,
    border-color 180ms ease,
    padding 180ms ease;
}

.site-header.scrolled {
  border-bottom: 1px solid var(--line);
  background: rgba(5, 6, 7, 0.82);
  backdrop-filter: blur(18px);
  padding-block: 12px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
}

.brand-mark {
  width: 25px;
  height: 25px;
  border: 1px solid rgba(124, 232, 255, 0.52);
  border-radius: 7px;
  background:
    radial-gradient(circle at 50% 50%, rgba(124, 232, 255, 0.9) 0 2px, transparent 3px),
    linear-gradient(145deg, rgba(255, 255, 255, 0.19), rgba(124, 232, 255, 0.05));
  box-shadow: 0 0 24px rgba(124, 232, 255, 0.24);
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

.desktop-nav a:hover,
.mobile-nav a:hover {
  color: var(--text);
}

.nav-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 8px;
  padding: 0 18px;
  font-size: 14px;
  font-weight: 700;
}

.nav-cta,
.secondary-button {
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.04);
}

.primary-button {
  border: 1px solid rgba(124, 232, 255, 0.6);
  background: linear-gradient(135deg, #eafcff, var(--cyan));
  color: #031114;
  box-shadow: 0 18px 50px rgba(124, 232, 255, 0.2);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.04);
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--text);
}

.mobile-nav {
  position: fixed;
  z-index: 19;
  top: 68px;
  left: 16px;
  right: 16px;
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: rgba(9, 11, 12, 0.96);
  backdrop-filter: blur(18px);
}

.mobile-nav.open {
  display: grid;
}

.mobile-nav a {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  color: var(--muted);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: #000;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  filter: saturate(0.88) contrast(1.08);
}

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.52) 38%, rgba(0, 0, 0, 0.16) 72%),
    linear-gradient(0deg, #050607 0%, rgba(5, 6, 7, 0) 38%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 138px 0 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(48px, 8vw, 112px);
  line-height: 0.95;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(30px, 4vw, 58px);
  line-height: 1.08;
  letter-spacing: 0;
}

h3 {
  font-size: 22px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 620px;
  color: rgba(255, 255, 255, 0.72);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 840px;
  margin-top: 56px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.hero-metrics div {
  padding: 22px;
  background: rgba(8, 10, 11, 0.76);
  backdrop-filter: blur(16px);
}

.hero-metrics strong {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(24px, 3vw, 40px);
}

.hero-metrics span {
  color: var(--muted);
  font-size: 13px;
}

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

.intro-band {
  width: 100%;
  border-block: 1px solid var(--line);
  background: linear-gradient(180deg, #07090a, #0b0d0e);
}

.intro-band .section-grid {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 56px;
  align-items: start;
}

.section-grid p,
.section-heading p,
.scenario p,
.layer p,
.business-grid p,
.timeline p,
.funding-card p,
.version-copy p,
.feature-grid p {
  color: var(--muted);
  line-height: 1.78;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.6fr);
  gap: 40px;
  align-items: end;
  margin-bottom: 42px;
}

.section-heading.narrow {
  display: block;
  max-width: 780px;
}

.section-heading.narrow p {
  max-width: 670px;
  margin-top: 20px;
}

.section-heading code {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 2px 6px;
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.86);
}

.video-section {
  width: 100%;
  padding-inline: max(20px, calc((100vw - var(--max)) / 2));
  background:
    radial-gradient(circle at 50% 16%, rgba(124, 232, 255, 0.12), transparent 38%),
    #050607;
}

.video-showcase {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #000;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.38);
}

.video-showcase video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
  object-fit: contain;
}

.video-caption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  display: grid;
  gap: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 13px 15px;
  background: rgba(5, 6, 7, 0.72);
  backdrop-filter: blur(14px);
}

.video-caption span {
  color: var(--cyan);
  font-size: 11px;
  font-weight: 900;
}

.video-caption strong {
  font-size: 15px;
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(320px, 0.75fr);
  gap: 18px;
  align-items: stretch;
}

.product-visual {
  min-height: 520px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #000;
}

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

.version-panel,
.feature-grid article,
.scenario,
.layer,
.business-grid article,
.timeline article,
.funding-card,
.ltv-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
}

.version-panel {
  display: flex;
  flex-direction: column;
  padding: 22px;
}

.version-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 30px;
}

.version-tab {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  cursor: pointer;
}

.version-tab.active {
  border-color: rgba(124, 232, 255, 0.56);
  background: rgba(124, 232, 255, 0.12);
  color: var(--text);
}

.version-copy {
  display: flex;
  flex: 1;
  flex-direction: column;
  justify-content: center;
}

.price {
  display: block;
  margin-bottom: 18px;
  color: var(--mint);
  font-size: 46px;
  font-weight: 900;
}

.version-copy ul {
  margin: 20px 0 0;
  padding-left: 18px;
  color: rgba(255, 255, 255, 0.74);
  line-height: 1.9;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 16px;
}

.feature-grid article {
  padding: 24px;
}

.feature-grid span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 900;
}

.split-section {
  width: 100%;
  padding-inline: max(20px, calc((100vw - var(--max)) / 2));
  background: #080a0b;
}

.market-matrix {
  display: grid;
  grid-template-columns: 0.75fr repeat(3, 1fr);
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.market-matrix div {
  min-height: 70px;
  display: flex;
  align-items: center;
  padding: 16px;
  background: #0d1012;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.market-matrix .matrix-head {
  min-height: 50px;
  color: var(--text);
  font-weight: 800;
  background: #161a1d;
}

.market-matrix .filled {
  color: var(--mint);
}

.market-matrix .empty {
  color: rgba(255, 255, 255, 0.34);
}

.market-matrix .target {
  color: #051014;
  font-weight: 900;
  background: linear-gradient(135deg, #ecfdff, var(--cyan));
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.scenario {
  padding: 32px;
}

.scenario-label {
  color: var(--gold);
  font-weight: 900;
}

.scenario dl {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 28px 0 0;
}

.scenario dl div {
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.scenario dt {
  color: var(--muted);
  font-size: 12px;
}

.scenario dd {
  margin: 8px 0 0;
  font-weight: 800;
}

.tech-section {
  width: 100%;
  padding-inline: max(20px, calc((100vw - var(--max)) / 2));
  background:
    linear-gradient(180deg, rgba(124, 232, 255, 0.05), rgba(5, 6, 7, 0) 42%),
    #050607;
}

.architecture {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 44px;
}

.layer {
  position: relative;
  padding: 30px;
}

.layer::before {
  content: "";
  position: absolute;
  top: 30px;
  right: -17px;
  width: 16px;
  height: 1px;
  background: var(--line-strong);
}

.layer:last-child::before {
  display: none;
}

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

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

.business-grid article {
  padding: 30px;
}

.business-grid strong {
  color: var(--mint);
  font-size: 56px;
}

.ltv-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(320px, 0.8fr);
  gap: 24px;
  align-items: center;
  margin-top: 16px;
  padding: 30px;
}

.bar-chart {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  height: 240px;
  align-items: end;
}

.bar-chart div {
  position: relative;
  min-height: 40px;
  height: var(--h);
  border: 1px solid rgba(124, 232, 255, 0.38);
  border-radius: 8px 8px 0 0;
  background: linear-gradient(180deg, rgba(124, 232, 255, 0.55), rgba(124, 232, 255, 0.1));
}

.bar-chart span,
.bar-chart b {
  position: absolute;
  left: 12px;
}

.bar-chart span {
  bottom: 12px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.bar-chart b {
  top: 12px;
  font-size: 18px;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.timeline article {
  padding: 26px;
}

.timeline span {
  display: inline-flex;
  margin-bottom: 22px;
  border: 1px solid rgba(216, 197, 144, 0.42);
  border-radius: 999px;
  padding: 6px 12px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 900;
}

.finance-section {
  width: 100%;
  padding-inline: max(20px, calc((100vw - var(--max)) / 2));
  background: #080a0b;
}

.finance-table {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.finance-table div {
  display: grid;
  grid-template-columns: 1fr repeat(3, 0.8fr);
  gap: 1px;
}

.finance-table span {
  display: block;
  padding: 20px;
  background: #0d1012;
}

.finance-table .table-head span {
  color: var(--text);
  font-weight: 900;
  background: #171b1e;
}

.funding-section {
  padding-bottom: 120px;
}

.funding-card {
  padding: clamp(30px, 6vw, 64px);
  background:
    linear-gradient(135deg, rgba(124, 232, 255, 0.12), rgba(255, 255, 255, 0.03)),
    #0b0d0e;
}

.funding-card h2 {
  max-width: 680px;
}

.funding-card > p {
  max-width: 760px;
  margin-top: 24px;
}

.funding-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 38px;
}

.funding-list div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: rgba(0, 0, 0, 0.2);
}

.funding-list strong {
  display: block;
  margin-bottom: 8px;
  color: var(--mint);
  font-size: 26px;
}

.funding-list span {
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  border-top: 1px solid var(--line);
  padding: 28px clamp(20px, 4vw, 48px);
  color: var(--muted);
  font-size: 13px;
}

.reveal {
  transform: translateY(18px);
  opacity: 0;
  transition:
    opacity 600ms ease,
    transform 600ms ease;
}

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

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

  .menu-button {
    display: block;
  }

  .hero {
    min-height: 920px;
    align-items: flex-end;
  }

  .hero-bg img {
    object-position: 56% 35%;
  }

  .hero-shade {
    background:
      linear-gradient(0deg, #050607 0%, rgba(5, 6, 7, 0.44) 55%, rgba(5, 6, 7, 0.1) 100%),
      linear-gradient(90deg, rgba(0, 0, 0, 0.68), rgba(0, 0, 0, 0.08));
  }

  .hero-metrics,
  .section-grid,
  .section-heading,
  .product-showcase,
  .scenario-grid,
  .architecture,
  .business-grid,
  .ltv-panel,
  .timeline {
    grid-template-columns: 1fr;
  }

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

  .product-visual {
    min-height: 420px;
  }

  .layer::before {
    display: none;
  }

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

@media (max-width: 640px) {
  .site-header {
    padding: 14px 16px;
  }

  .brand {
    font-size: 14px;
  }

  .hero {
    min-height: 820px;
  }

  .hero-content {
    width: calc(100% - 32px);
    padding-bottom: 42px;
  }

  h1 {
    font-size: 48px;
  }

  h2 {
    font-size: 32px;
  }

  .section {
    width: calc(100% - 32px);
    padding: 72px 0;
  }

  .hero-actions,
  .site-footer {
    flex-direction: column;
  }

  .feature-grid,
  .scenario dl,
  .funding-list {
    grid-template-columns: 1fr;
  }

  .market-matrix {
    grid-template-columns: 0.75fr repeat(3, 1fr);
    overflow-x: auto;
  }

  .market-matrix div {
    min-width: 128px;
    padding: 12px;
    font-size: 12px;
  }

  .finance-table {
    overflow-x: auto;
  }

  .finance-table div {
    min-width: 640px;
  }

  .product-visual {
    min-height: 320px;
  }

  .video-caption {
    position: static;
    border-inline: 0;
    border-bottom: 0;
    border-radius: 0;
  }
}