:root {
  --bg: #000;
  --bg-elevated: #111;
  --bg-soft: #f5f5f7;
  --text: #f5f5f7;
  --text-dark: #1d1d1f;
  --text-muted: #86868b;
  --accent: #2997ff;
  --accent-hover: #0077ed;
  --border: rgba(255, 255, 255, 0.12);
  --nav-h: 52px;
  --max-w: 1080px;
  --radius: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.47059;
  letter-spacing: -0.022em;
}

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

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

.container {
  width: min(var(--max-w), calc(100% - 48px));
  margin: 0 auto;
}

/* Nav */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.nav-logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  font-size: 12px;
  color: rgba(245, 245, 247, 0.8);
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: #fff; }

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  color: #fff;
  font-size: 22px;
  cursor: pointer;
}

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: calc(var(--nav-h) + 48px) 24px 80px;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(41, 151, 255, 0.18), transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 80%, rgba(124, 58, 237, 0.12), transparent 50%),
    #000;
}

.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.05;
  max-width: 900px;
}

.hero p.lead {
  margin: 0 auto 36px;
  max-width: 640px;
  font-size: clamp(17px, 2.5vw, 21px);
  color: var(--text-muted);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 980px;
  font-size: 17px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: background 0.25s, transform 0.15s;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  backdrop-filter: blur(10px);
}

.btn-secondary:hover { background: rgba(255, 255, 255, 0.2); }

/* Sections */
.section {
  padding: 100px 0;
}

.section-light {
  background: var(--bg-soft);
  color: var(--text-dark);
}

.section-dark {
  background: var(--bg-elevated);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header h2 {
  margin: 0 0 12px;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-header p {
  margin: 0 auto;
  max-width: 580px;
  font-size: 19px;
  color: var(--text-muted);
}

.section-light .section-header p { color: #6e6e73; }

/* Feature grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 36px 28px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  transition: transform 0.3s, border-color 0.3s;
}

.section-light .feature-card {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(41, 151, 255, 0.35);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-size: 22px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(41, 151, 255, 0.2), rgba(124, 58, 237, 0.2));
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.feature-card p {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

.section-light .feature-card p { color: #6e6e73; }

/* Showcase */
.showcase {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.showcase.reverse { direction: rtl; }
.showcase.reverse > * { direction: ltr; }

.showcase-visual {
  aspect-ratio: 4/3;
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(41, 151, 255, 0.15), rgba(124, 58, 237, 0.1)),
    radial-gradient(circle at 30% 30%, rgba(255,255,255,0.08), transparent 50%),
    #0a0a0a;
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 64px;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: rgba(255,255,255,0.15);
}

.section-light .showcase-visual {
  background:
    linear-gradient(145deg, #e8f4ff, #f0ebff),
    #fff;
  border: 1px solid rgba(0,0,0,0.06);
  color: rgba(0,0,0,0.08);
}

.showcase-copy h2 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.showcase-copy p {
  margin: 0 0 24px;
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.6;
}

.section-light .showcase-copy p { color: #6e6e73; }

.link-arrow {
  color: var(--accent);
  font-size: 17px;
  font-weight: 500;
}

.link-arrow:hover { text-decoration: underline; }

.section-light .link-arrow { color: var(--accent-hover); }

/* Stats */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
  padding: 48px 0;
}

.stat-item strong {
  display: block;
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.stat-item span {
  font-size: 14px;
  color: var(--text-muted);
}

.section-light .stat-item span { color: #6e6e73; }

/* Product / Download */
.product-hero {
  padding: calc(var(--nav-h) + 80px) 0 60px;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(41, 151, 255, 0.15), transparent),
    #000;
}

.product-hero .product-icon {
  width: 88px;
  height: 88px;
  margin: 0 auto 24px;
  border-radius: 22px;
  background: transparent;
  display: grid;
  place-items: center;
  box-shadow: none;
}

.product-icon img {
  width: 72px;
  height: 72px;
}

.product-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.product-hero .tagline {
  margin: 0 auto 32px;
  max-width: 520px;
  font-size: 19px;
  color: var(--text-muted);
}

.product-card {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
}

.product-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 32px 0;
  text-align: left;
}

.product-specs dt {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.product-specs dd {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
}

.product-features {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  text-align: left;
}

.product-features li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  color: rgba(245, 245, 247, 0.85);
}

.product-features li::before {
  content: "✓";
  color: var(--accent);
  margin-right: 12px;
  font-weight: 700;
}

.download-btn {
  width: 100%;
  padding: 18px;
  font-size: 19px;
}

.download-meta {
  margin-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Page content */
.page-hero {
  padding: calc(var(--nav-h) + 72px) 0 48px;
  text-align: center;
  background: var(--bg-elevated);
}

.page-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 700;
  letter-spacing: -0.04em;
}

.page-hero p {
  margin: 0 auto;
  max-width: 600px;
  font-size: 19px;
  color: var(--text-muted);
}

.content-block {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.content-block h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 48px 0 16px;
}

.content-block h2:first-child { margin-top: 0; }

.content-block p,
.content-block li {
  font-size: 17px;
  color: rgba(245, 245, 247, 0.85);
  line-height: 1.7;
}

.content-block ul {
  padding-left: 20px;
}

.section-light .content-block p,
.section-light .content-block li { color: #424245; }

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
  max-width: 720px;
  margin: 0 auto;
}

.contact-card {
  padding: 28px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  text-align: center;
}

.contact-card h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
}

.contact-card p {
  margin: 0;
  font-size: 15px;
  color: var(--text-muted);
}

.contact-card a {
  color: var(--accent);
}

/* Footer */
.site-footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
  background: #000;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 32px;
  align-items: flex-start;
}

.footer-brand {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 280px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  gap: 48px;
}

.footer-col h4 {
  margin: 0 0 12px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.04em;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li { margin-bottom: 8px; }

.footer-col a {
  font-size: 12px;
  color: var(--text-muted);
}

.footer-col a:hover { color: #fff; }

.footer-bottom {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

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

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(0, 0, 0, 0.95);
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open { display: flex; }

  .nav-links li { padding: 12px 24px; }

  .nav-toggle { display: block; }

  .showcase { grid-template-columns: 1fr; }
  .showcase.reverse { direction: ltr; }

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

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

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

/* Logo & brand */
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-logo img { width: 32px; height: 32px; border-radius: 9px; }

.footer-logo strong {
  display: block;
  color: #fff;
  font-size: 15px;
}

.address-block {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.section-light .address-block {
  background: #fff;
  border-color: rgba(0, 0, 0, 0.08);
  color: #6e6e73;
}

.address-block strong { color: var(--text-primary); }
.section-light .address-block strong { color: var(--text-dark); }

/* Investments — broker-style sections */
.invest-hero {
  padding: calc(var(--nav-h) + 80px) 0 72px;
  text-align: center;
  background:
    radial-gradient(ellipse 80% 55% at 50% -10%, rgba(41, 151, 255, 0.2), transparent),
    #000;
}

.invest-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 700;
  letter-spacing: -0.04em;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.invest-hero .lead {
  max-width: 680px;
  margin: 0 auto 28px;
  font-size: clamp(17px, 2.5vw, 21px);
  color: var(--text-muted);
  line-height: 1.5;
}

.value-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 48px;
}

.value-strip article {
  padding: 28px 24px;
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
}

.value-strip strong {
  display: block;
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
  background: linear-gradient(135deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.value-strip span {
  font-size: 14px;
  color: var(--text-muted);
}

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

.market-tile {
  padding: 24px 20px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  transition: border-color 0.25s, transform 0.25s;
}

.section-light .market-tile {
  background: #fff;
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
}

.market-tile:hover {
  border-color: rgba(41, 151, 255, 0.4);
  transform: translateY(-3px);
}

.market-tile .tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.market-tile h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
}

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

.section-light .market-tile p { color: #6e6e73; }

.platform-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}

.platform-panel {
  padding: 36px;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(37, 99, 235, 0.12), rgba(124, 58, 237, 0.08));
  border: 1px solid var(--border);
}

.platform-list {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
}

.platform-list li {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  color: rgba(245, 245, 247, 0.9);
}

.platform-list li:last-child { border-bottom: 0; }

.platform-list .icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(41, 151, 255, 0.15);
  display: grid;
  place-items: center;
  font-size: 16px;
  flex-shrink: 0;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.trust-item {
  padding: 24px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
}

.trust-item strong {
  display: block;
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}

.trust-item span {
  font-size: 13px;
  color: var(--text-muted);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step::before {
  counter-increment: step;
  content: counter(step);
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #7c3aed);
  font-weight: 700;
  font-size: 16px;
}

.process-step h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
}

.process-step p {
  margin: 0;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.5;
}

.section-light .process-step p { color: #6e6e73; }

.disclaimer {
  max-width: 820px;
  margin: 48px auto 0;
  padding: 20px 24px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.65;
}

.cta-band {
  text-align: center;
  padding: 72px 24px;
  background:
    radial-gradient(ellipse 60% 80% at 50% 100%, rgba(41, 151, 255, 0.15), transparent),
    var(--bg-elevated);
}

.cta-band h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.cta-band p {
  margin: 0 auto 28px;
  max-width: 520px;
  color: var(--text-muted);
  font-size: 17px;
}

@media (max-width: 768px) {
  .value-strip { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr 1fr; }
}

/* Cloud / Compute */
.cloud-hero {
  padding: calc(var(--nav-h) + 88px) 0 80px;
  text-align: center;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, rgba(99, 102, 241, 0.22), transparent),
    radial-gradient(ellipse 50% 40% at 90% 80%, rgba(59, 130, 246, 0.12), transparent),
    #000;
}

.cloud-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(36px, 6vw, 58px);
  font-weight: 700;
  letter-spacing: -0.04em;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.gpu-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.gpu-card {
  padding: 28px 24px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  text-align: center;
  transition: transform 0.25s, border-color 0.25s;
}

.section-light .gpu-card {
  background: #fff;
  border-color: rgba(0, 0, 0, 0.06);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
}

.gpu-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.45);
}

.gpu-card .chip {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(168, 85, 247, 0.2));
  color: #93c5fd;
  margin-bottom: 14px;
}

.section-light .gpu-card .chip { color: #2563eb; }

.gpu-card h3 {
  margin: 0 0 8px;
  font-size: 20px;
  font-weight: 700;
}

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

.section-light .gpu-card p { color: #6e6e73; }

.infra-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border-radius: 20px;
  overflow: hidden;
  margin-top: 40px;
}

.infra-band article {
  padding: 32px 24px;
  background: rgba(255, 255, 255, 0.03);
  text-align: center;
}

.infra-band strong {
  display: block;
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 6px;
}

.infra-band span {
  font-size: 13px;
  color: var(--text-muted);
}

.service-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.service-block {
  padding: 32px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

.section-light .service-block {
  background: #fff;
  border-color: rgba(0, 0, 0, 0.06);
}

.service-block h3 {
  margin: 0 0 12px;
  font-size: 22px;
  font-weight: 700;
}

.service-block ul {
  margin: 16px 0 0;
  padding-left: 18px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.8;
}

.section-light .service-block ul { color: #6e6e73; }

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 24px;
}

.badge-row span {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border);
  color: rgba(245, 245, 247, 0.85);
}

@media (max-width: 768px) {
  .gpu-grid { grid-template-columns: 1fr; }
  .infra-band { grid-template-columns: 1fr 1fr; }
  .service-row { grid-template-columns: 1fr; }
}