/* ═══════════════════════════════════════
   NAVIGATION
═══════════════════════════════════════ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  transition: background var(--tr-base), border-bottom-color var(--tr-base),
              box-shadow var(--tr-base);
}
.site-header.scrolled {
  background: rgba(5,11,26,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--c-border);
  box-shadow: 0 4px 32px rgba(0,0,0,0.4);
}

.navbar { height: 100%; }
.nav-container {
  display: flex;
  align-items: center;
  height: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-8);
  gap: var(--sp-8);
}

.nav-logo {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  flex-shrink: 0;
}
.logo-mark {
  font-family: var(--f-display);
  font-size: var(--t-2xl);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--c-text);
}
.logo-accent { color: var(--c-blue); }
.logo-text {
  font-family: var(--f-mono);
  font-size: var(--t-xs);
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--c-text-2);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  flex: 1;
}
.nav-item { position: relative; }
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-1);
  padding: var(--sp-2) var(--sp-4);
  font-size: var(--t-sm);
  font-weight: 500;
  color: var(--c-text-2);
  border-radius: var(--r-md);
  transition: color var(--tr-fast), background var(--tr-fast);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: var(--c-text); background: rgba(255,255,255,0.05); }
.nav-arrow { transition: transform var(--tr-fast); }
.nav-item.open .nav-arrow { transform: rotate(180deg); }

/* Mega Menu Panel */
.mega-menu-panel {
  position: absolute;
  top: calc(100% + var(--sp-2));
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  min-width: 640px;
  background: var(--c-bg-2);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  box-shadow: var(--shadow-card), var(--glow-blue);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--tr-base), transform var(--tr-base);
}
.nav-item.open .mega-menu-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.mega-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}
.mega-grid-2 { grid-template-columns: repeat(2, 1fr); }
.mega-heading {
  font-family: var(--f-mono);
  font-size: var(--t-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-bottom: var(--sp-3);
}
.mega-link {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-3);
  padding: var(--sp-3);
  border-radius: var(--r-md);
  transition: background var(--tr-fast);
  margin-bottom: var(--sp-1);
}
.mega-link:hover { background: var(--c-blue-dim); }
.mega-link-icon { color: var(--c-blue); font-size: var(--t-lg); flex-shrink: 0; margin-top: 2px; }
.mega-link strong { display: block; font-size: var(--t-sm); color: var(--c-text); margin-bottom: 2px; }
.mega-link small  { display: block; font-size: var(--t-xs); color: var(--c-text-2); }

.mega-featured { border-left: 1px solid var(--c-border); padding-left: var(--sp-6); }
.mega-feature-card { padding: var(--sp-4); }
.mega-feature-tag {
  font-family: var(--f-mono);
  font-size: var(--t-xs);
  color: var(--c-cyan);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: block;
  margin-bottom: var(--sp-3);
}
.mega-feature-card h4 { font-size: var(--t-lg); margin-bottom: var(--sp-2); }
.mega-feature-card p  { font-size: var(--t-sm); color: var(--c-text-2); margin-bottom: var(--sp-4); }

.nav-actions { display: flex; align-items: center; gap: var(--sp-3); margin-left: auto; }

/* Hamburger */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
  padding: var(--sp-2);
  border-radius: var(--r-md);
  background: rgba(255,255,255,0.05);
  cursor: pointer;
}
.hamburger-line {
  display: block;
  width: 100%; height: 1.5px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform var(--tr-base), opacity var(--tr-base);
}
.mobile-menu-btn.open .hamburger-line:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.mobile-menu-btn.open .hamburger-line:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open .hamburger-line:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ═══════════════════════════════════════
   HERO
═══════════════════════════════════════ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--c-bg);
  padding-top: var(--nav-h);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  opacity: 0.6;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,200,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,255,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-split {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: var(--sp-16);
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--sp-24) var(--sp-8);
  min-height: calc(100vh - var(--nav-h));
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-family: var(--f-mono);
  font-size: var(--t-xs);
  color: var(--c-text-2);
  letter-spacing: 0.1em;
  margin-bottom: var(--sp-6);
}
.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-cyan);
  box-shadow: 0 0 8px var(--c-cyan);
  animation: pulse-dot 2s infinite;
}

.hero-title {
  font-size: var(--t-8xl);
  font-weight: 700;
  line-height: 1;
  margin-bottom: var(--sp-8);
  display: flex;
  flex-direction: column;
}
.hero-line-1 { color: var(--c-blue); text-shadow: var(--glow-blue); }
.hero-line-2 { color: var(--c-text); }
.hero-line-3 { color: var(--c-cyan); text-shadow: var(--glow-cyan); }

.hero-subtitle {
  font-size: var(--t-lg);
  color: var(--c-text-2);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: var(--sp-10);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-16);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  gap: var(--sp-10);
  flex-wrap: wrap;
}
.hero-stat { display: flex; flex-direction: column; }
.stat-num {
  font-family: var(--f-display);
  font-size: var(--t-4xl);
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
}
.stat-plus { color: var(--c-blue); font-size: var(--t-2xl); vertical-align: super; }
.stat-label { font-size: var(--t-xs); color: var(--c-text-3); margin-top: var(--sp-1); letter-spacing: 0.05em; }

/* ─── Isometric Scene ─── */
.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}
.iso-scene {
  position: relative;
  width: 420px;
  height: 420px;
}

.iso-cube {
  position: absolute;
  width: 80px;
  height: 92px;
}
.cube-face { position: absolute; }
.face-top {
  width: 80px; height: 46px; top: 0; left: 0;
  clip-path: polygon(50% 0%, 100% 25%, 50% 50%, 0% 25%);
}
.face-right {
  width: 40px; height: 46px; right: 0; top: 23px;
  clip-path: polygon(0% 0%, 100% 25%, 100% 100%, 0% 75%);
}
.face-left {
  width: 40px; height: 46px; left: 0; top: 23px;
  clip-path: polygon(0% 25%, 100% 0%, 100% 75%, 0% 100%);
}

.cube-1 { top: 60px; left: 100px; animation: float-cube 5s ease-in-out infinite; }
.cube-1 .face-top   { background: linear-gradient(135deg, #00c8ff 0%, #0066cc 100%); }
.cube-1 .face-right { background: linear-gradient(180deg, #004499 0%, #001a66 100%); }
.cube-1 .face-left  { background: linear-gradient(180deg, #003388 0%, #001155 100%); }

.cube-2 { top: 40px; left: 220px; animation: float-cube 5s ease-in-out infinite 0.8s; }
.cube-2 .face-top   { background: linear-gradient(135deg, #00ffcc 0%, #00bbaa 100%); }
.cube-2 .face-right { background: linear-gradient(180deg, #007766 0%, #004433 100%); }
.cube-2 .face-left  { background: linear-gradient(180deg, #006655 0%, #003322 100%); }

.cube-3 { top: 160px; left: 60px; animation: float-cube 5.5s ease-in-out infinite 1.6s; }
.cube-3 .face-top   { background: linear-gradient(135deg, #6c3fff 0%, #4422cc 100%); }
.cube-3 .face-right { background: linear-gradient(180deg, #2211aa 0%, #110077 100%); }
.cube-3 .face-left  { background: linear-gradient(180deg, #1a0099 0%, #0d0066 100%); }

.cube-4 { top: 180px; left: 230px; animation: float-cube 4.5s ease-in-out infinite 0.4s; }
.cube-4 .face-top   { background: linear-gradient(135deg, #00c8ff 0%, #6c3fff 100%); }
.cube-4 .face-right { background: linear-gradient(180deg, #441199 0%, #220055 100%); }
.cube-4 .face-left  { background: linear-gradient(180deg, #330088 0%, #1a0044 100%); }

.iso-lines { position: absolute; inset: 0; pointer-events: none; }
.iso-line {
  position: absolute;
  background: linear-gradient(90deg, transparent, var(--c-blue), transparent);
  height: 1px;
  opacity: 0.3;
  animation: scan-line 3s linear infinite;
}
.l1 { width: 100%; top: 30%; animation-delay: 0s; }
.l2 { width: 80%; top: 55%; left: 10%; animation-delay: 1s; }
.l3 { width: 60%; top: 75%; left: 20%; animation-delay: 2s; }

.iso-data-points { position: absolute; inset: 0; }
.data-point {
  position: absolute;
  background: var(--c-bg-card);
  border: 1px solid var(--c-border-str);
  border-radius: var(--r-md);
  padding: var(--sp-2) var(--sp-3);
  box-shadow: var(--glow-blue);
  animation: float-data 4s ease-in-out infinite;
}
.dp-1 { bottom: 100px; left: 20px; animation-delay: 0s; }
.dp-2 { top: 20px; right: 40px; animation-delay: 1.3s; }
.dp-3 { bottom: 60px; right: 20px; animation-delay: 2.6s; }
.dp-value {
  display: block;
  font-family: var(--f-mono);
  font-size: var(--t-lg);
  font-weight: 700;
  color: var(--c-cyan);
}
.dp-label { font-size: var(--t-xs); color: var(--c-text-2); }

.scroll-indicator {
  position: absolute;
  bottom: var(--sp-8);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  z-index: 2;
  opacity: 0.5;
}
.scroll-indicator span { font-size: var(--t-xs); letter-spacing: 0.15em; color: var(--c-text-2); }
.scroll-line {
  width: 1px; height: 40px;
  background: linear-gradient(var(--c-blue), transparent);
  animation: scroll-pulse 2s ease-in-out infinite;
}

/* ═══════════════════════════════════════
   SERVICES GRID
═══════════════════════════════════════ */
.services-overview { background: var(--c-bg); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
  margin-bottom: var(--sp-12);
}
.section-cta-row { text-align: center; }

/* ═══════════════════════════════════════
   WHY US
═══════════════════════════════════════ */
.why-us { background: var(--c-bg-2); }
.why-us-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: center;
}
.why-list { margin: var(--sp-10) 0; display: flex; flex-direction: column; gap: var(--sp-6); }
.why-item { display: flex; align-items: flex-start; gap: var(--sp-4); }
.why-icon-wrap {
  flex-shrink: 0;
  width: 36px; height: 36px;
  border-radius: var(--r-md);
  background: var(--c-blue-dim);
  border: 1px solid var(--c-border-str);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-blue);
}
.why-item h4 { font-size: var(--t-md); margin-bottom: var(--sp-1); color: var(--c-text); }
.why-item p  { font-size: var(--t-sm); color: var(--c-text-2); }

.metrics-panel { display: flex; flex-direction: column; gap: var(--sp-4); }
.metric-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); }
.metric-card {
  padding: var(--sp-6);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  background: var(--c-bg-card);
}
.metric-card.accent-blue  { border-color: rgba(0,200,255,0.3); box-shadow: inset 0 0 30px rgba(0,200,255,0.05); }
.metric-card.accent-cyan  { border-color: rgba(0,255,204,0.3); box-shadow: inset 0 0 30px rgba(0,255,204,0.05); }
.metric-card.accent-purple{ border-color: rgba(108,63,255,0.3); box-shadow: inset 0 0 30px rgba(108,63,255,0.05); }
.metric-num {
  display: block;
  font-family: var(--f-display);
  font-size: var(--t-4xl);
  font-weight: 700;
  color: var(--c-text);
  line-height: 1;
  margin-bottom: var(--sp-1);
}
.metric-label { font-size: var(--t-xs); color: var(--c-text-2); letter-spacing: 0.05em; }
.tech-tags { display: flex; flex-wrap: wrap; gap: var(--sp-2); }

/* ═══════════════════════════════════════
   CTA
═══════════════════════════════════════ */
.cta-section { background: var(--c-bg); }
.cta-inner {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}
.cta-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, rgba(0,200,255,0.1) 0%, transparent 70%);
  pointer-events: none;
  border-radius: 50%;
}
.cta-title {
  font-size: var(--t-6xl);
  margin-bottom: var(--sp-5);
}
.cta-desc {
  font-size: var(--t-lg);
  color: var(--c-text-2);
  margin-bottom: var(--sp-10);
  line-height: 1.7;
}
.cta-actions { display: flex; justify-content: center; gap: var(--sp-4); flex-wrap: wrap; }

/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
.site-footer {
  background: var(--c-bg-2);
  border-top: 1px solid var(--c-border);
  padding: var(--sp-20) 0 var(--sp-8);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--sp-16);
  margin-bottom: var(--sp-16);
}
.footer-logo { display: flex; align-items: baseline; gap: var(--sp-2); margin-bottom: var(--sp-4); }
.footer-tagline { font-family: var(--f-mono); font-size: var(--t-sm); color: var(--c-blue); margin-bottom: var(--sp-2); }
.footer-sub-cn  { font-size: var(--t-xs); color: var(--c-text-3); margin-bottom: var(--sp-4); }
.footer-address { font-size: var(--t-sm); color: var(--c-text-2); line-height: 1.7; }

.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-8); }
.footer-heading {
  font-family: var(--f-mono);
  font-size: var(--t-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-text-3);
  margin-bottom: var(--sp-4);
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--sp-3); }
.footer-col a { font-size: var(--t-sm); color: var(--c-text-2); transition: color var(--tr-fast); }
.footer-col a:hover { color: var(--c-blue); }

.footer-bottom {
  border-top: 1px solid var(--c-border);
  padding-top: var(--sp-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.footer-copyright, .footer-legal { font-size: var(--t-xs); color: var(--c-text-3); }

/* ═══════════════════════════════════════
   SERVICES PAGE
═══════════════════════════════════════ */
.services-list { display: flex; flex-direction: column; gap: var(--sp-6); }
.service-detail-card {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--sp-10);
  align-items: start;
  padding: var(--sp-10);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  transition: border-color var(--tr-base), box-shadow var(--tr-base);
}
.service-detail-card:hover {
  border-color: var(--c-border-str);
  box-shadow: var(--glow-blue);
}
.service-detail-left {}
.service-detail-num {
  font-family: var(--f-mono);
  font-size: var(--t-xs);
  color: var(--c-blue);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: var(--sp-4);
}
.service-detail-title { font-size: var(--t-3xl); margin-bottom: var(--sp-4); }
.service-detail-desc { color: var(--c-text-2); line-height: 1.7; margin-bottom: var(--sp-6); }
.service-features { display: flex; flex-direction: column; gap: var(--sp-3); }
.feature-item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-size: var(--t-sm);
  color: var(--c-text-2);
}
.feature-item::before {
  content: '▸';
  color: var(--c-cyan);
  flex-shrink: 0;
}

/* ═══════════════════════════════════════
   ABOUT PAGE
═══════════════════════════════════════ */
.about-story { background: var(--c-bg); }
.about-story-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-16);
  align-items: start;
}
.about-values { background: var(--c-bg-2); }
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--sp-6);
}
.value-card {
  padding: var(--sp-8);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
}
.value-icon { font-size: var(--t-3xl); margin-bottom: var(--sp-4); color: var(--c-blue); }
.value-card h3 { font-size: var(--t-xl); margin-bottom: var(--sp-3); }
.value-card p  { font-size: var(--t-sm); color: var(--c-text-2); line-height: 1.7; }

/* ═══════════════════════════════════════
   CONTACT PAGE
═══════════════════════════════════════ */
.contact-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--sp-16);
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: var(--sp-6); }
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--sp-4);
  padding: var(--sp-6);
  background: var(--c-bg-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
}
.contact-info-icon {
  width: 44px; height: 44px; flex-shrink: 0;
  background: var(--c-blue-dim);
  border: 1px solid var(--c-border-str);
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--c-blue);
}
.contact-info-item h4 { font-size: var(--t-sm); color: var(--c-text-2); margin-bottom: var(--sp-1); }
.contact-info-item p  { font-size: var(--t-md); color: var(--c-text); }