/* ==========================================================================
   NAVIGATION
   ========================================================================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  border-bottom: 1px solid transparent;
  transition: background var(--d-base) var(--ease-standard),
              border-color var(--d-base) var(--ease-standard),
              backdrop-filter var(--d-base) var(--ease-standard);
}

.nav.is-scrolled {
  background: rgba(250, 250, 250, 0.78);
  backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  border-bottom-color: var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
  height: 76px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  font-size: 1.0625rem;
}

.nav-brand-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--r-md);
  background: var(--ink);
  position: relative;
  display: grid;
  place-items: center;
  color: var(--accent);
  font-weight: 800;
  font-size: 0.875rem;
  letter-spacing: 0;
}

.nav-brand-mark::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 8px;
  border: 1px solid rgba(214, 255, 61, 0.35);
  pointer-events: none;
}

.nav-brand-sub {
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  color: var(--muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--s-2);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: 10px 14px;
  border-radius: var(--r-md);
  font-size: 0.9375rem;
  color: var(--ink-3);
  position: relative;
  transition: background var(--d-fast) var(--ease-standard),
              color var(--d-fast) var(--ease-standard);
}

.nav-link:hover,
.nav-link[aria-expanded="true"] {
  background: rgba(10, 10, 10, 0.05);
  color: var(--ink);
}

.nav-caret {
  width: 10px;
  height: 10px;
  transition: transform var(--d-fast) var(--ease-standard);
}

.nav-link[aria-expanded="true"] .nav-caret {
  transform: rotate(180deg);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--s-3);
}

/* Mega Menu */
.mega {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  z-index: var(--z-mega);
  pointer-events: none;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--d-base) var(--ease-standard),
              transform var(--d-base) var(--ease-standard);
}

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

.mega-panel {
  margin: var(--s-3) auto var(--s-6);
  max-width: var(--container);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: var(--r-xl);
  box-shadow: var(--glass-shadow);
  padding: var(--s-7);
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr;
  gap: var(--s-7);
}

.mega-col h4 {
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: var(--s-4);
  font-weight: 500;
}

.mega-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 12px;
  margin-inline: -12px;
  border-radius: var(--r-md);
  transition: background var(--d-fast) var(--ease-standard);
}

.mega-link:hover {
  background: rgba(10, 10, 10, 0.04);
}

.mega-link strong {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--ink);
}

.mega-link span {
  font-size: var(--fs-sm);
  color: var(--muted);
}

.mega-feature {
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-lg);
  padding: var(--s-6);
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  position: relative;
  overflow: hidden;
}

.mega-feature::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 100% 0%, rgba(214, 255, 61, 0.18), transparent 60%);
  pointer-events: none;
}

.mega-feature-tag {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--accent);
}

.mega-feature h5 {
  font-size: 1.25rem;
  font-weight: 600;
  margin: 0;
  color: var(--paper);
}

.mega-feature p {
  font-size: var(--fs-sm);
  color: rgba(250, 250, 250, 0.7);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--r-md);
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
}

.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative;
  padding-top: calc(76px + var(--s-9));
  padding-bottom: var(--s-9);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(60% 50% at 80% 0%, rgba(214, 255, 61, 0.25), transparent 70%),
    radial-gradient(50% 60% at 0% 100%, rgba(10, 10, 10, 0.06), transparent 60%),
    var(--paper);
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(10,10,10,0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(10,10,10,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 35%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 35%, transparent 80%);
}

.hero-bg-noise {
  position: absolute;
  inset: 0;
  opacity: 0.4;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.07 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: var(--s-8);
  align-items: center;
}

.hero-copy h1 {
  font-size: var(--fs-display);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: var(--lh-tight);
}

.hero-copy h1 em {
  font-style: normal;
  position: relative;
  display: inline-block;
  padding: 0 0.12em;
}

.hero-copy h1 em::before {
  content: "";
  position: absolute;
  inset: 0.08em -0.08em 0.05em -0.08em;
  background: var(--accent);
  z-index: -1;
  transform: skew(-6deg);
}

.hero-lede {
  margin-top: var(--s-5);
  font-size: 1.125rem;
  color: var(--ink-3);
  max-width: 50ch;
  line-height: 1.55;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-3);
  margin-top: var(--s-6);
}

.hero-meta {
  display: flex;
  gap: var(--s-7);
  margin-top: var(--s-7);
  padding-top: var(--s-6);
  border-top: 1px solid var(--line);
}

.hero-meta-item .num {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
}

.hero-meta-item .lbl {
  display: block;
  font-size: var(--fs-xs);
  font-family: var(--font-mono);
  color: var(--muted);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  margin-top: 4px;
}

.hero-visual {
  position: relative;
  aspect-ratio: 4 / 3;
}

/* Ticker */
.ticker {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  padding-block: var(--s-4);
  overflow: hidden;
  border-block: 1px solid var(--ink-2);
}

.ticker-track {
  display: flex;
  gap: var(--s-8);
  width: max-content;
  animation: ticker 40s linear infinite;
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: rgba(250, 250, 250, 0.78);
  white-space: nowrap;
}

.ticker-item .dot {
  width: 6px;
  height: 6px;
  border-radius: var(--r-pill);
  background: var(--accent);
}

/* ==========================================================================
   SECTION GRIDS
   ========================================================================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--s-5);
}

.feature-grid > .card-wide {
  grid-column: span 8;
}

.feature-grid > .card-tall {
  grid-column: span 4;
  grid-row: span 2;
}

.feature-grid > .card-half {
  grid-column: span 4;
}

.feature-grid > .card-third {
  grid-column: span 4;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-5);
}

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-5);
}

.workflow {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--s-8);
  align-items: stretch;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--s-7);
  align-items: stretch;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.footer {
  background: var(--ink);
  color: rgba(250, 250, 250, 0.7);
  padding-top: var(--s-9);
  padding-bottom: var(--s-6);
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(70% 50% at 90% 0%, rgba(214, 255, 61, 0.10), transparent 70%);
  pointer-events: none;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--s-7);
  position: relative;
}

.footer h4 {
  font-size: var(--fs-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--muted-2);
  font-weight: 500;
  margin-bottom: var(--s-4);
}

.footer-links a {
  display: block;
  padding: 6px 0;
  color: rgba(250, 250, 250, 0.78);
  font-size: 0.9375rem;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

.footer-brand-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: var(--tracking-tight);
}

.footer-brand-zh {
  font-size: var(--fs-sm);
  color: var(--muted-2);
  letter-spacing: 0.04em;
}

.footer-brand p {
  font-size: 0.9375rem;
  max-width: 36ch;
  color: rgba(250, 250, 250, 0.7);
}

.footer-bottom {
  margin-top: var(--s-8);
  padding-top: var(--s-5);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--s-3);
  font-size: var(--fs-sm);
  color: var(--muted-2);
  position: relative;
}

.footer-bottom .legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-5);
}