/* ====================================================
   HAOSHI TECH · 浩世科技 · Global Styles
   Deep Dark Tech Editorial Design
   ==================================================== */

:root {
  --bg-deep:    #050709;
  --bg-dark:    #080c12;
  --bg-alt:     #0c1118;
  --bg-card:    #0f1520;
  --bg-card2:   #131c2a;
  --accent:     #00d4ff;
  --accent2:    #0066ff;
  --accent3:    #7b2fff;
  --gold:       #c9a84c;
  --text-white: #f0f4f8;
  --text-mid:   #8a9ab0;
  --text-dim:   #4a5568;
  --border:     rgba(0, 212, 255, 0.12);
  --border-mid: rgba(0, 212, 255, 0.25);
  --glow:       rgba(0, 212, 255, 0.15);
  --font-cn:    'Noto Sans TC', sans-serif;
  --font-en:    'Inter', sans-serif;
  --font-mono:  'Share Tech Mono', monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-deep);
  color: var(--text-white);
  font-family: var(--font-en);
  overflow-x: hidden;
  line-height: 1.6;
}

/* ── Image fallback / placeholder ── */
.product-img-wrap img,
.showroom-img-wrap img,
.hero-drone-img img,
.packaging-img img {
  background: linear-gradient(135deg, var(--bg-card2) 0%, var(--bg-alt) 100%);
  min-height: 200px;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

/* ── Typography ── */
h1, h2, h3, h4 { font-family: var(--font-cn); font-weight: 700; line-height: 1.2; }
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: 100%; object-fit: cover; }

/* ====================================================
   NAVBAR
   ==================================================== */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 40px;
  height: 64px;
  display: flex;
  align-items: center;
  background: rgba(5, 7, 9, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s, border-color 0.3s;
}
#navbar.scrolled {
  background: rgba(5, 7, 9, 0.98);
  border-bottom-color: var(--border-mid);
}
.nav-inner {
  width: 100%; max-width: 1400px; margin: auto;
  display: flex; align-items: center; gap: 40px;
}
.nav-logo {
  display: flex; align-items: center; gap: 6px;
  font-family: var(--font-cn); font-weight: 900; font-size: 18px;
  letter-spacing: 2px; white-space: nowrap;
}
.logo-bracket { color: var(--accent); font-weight: 300; font-size: 22px; }
.logo-text { color: var(--text-white); }
.logo-eng {
  font-family: var(--font-en); font-size: 10px; font-weight: 300;
  letter-spacing: 4px; color: var(--text-mid);
  text-transform: uppercase; margin-left: 8px;
}
.nav-links {
  display: flex; gap: 32px; margin-left: auto;
}
.nav-links a {
  font-size: 12px; font-weight: 500; letter-spacing: 2px;
  text-transform: uppercase; color: var(--text-mid);
  transition: color 0.2s;
  font-family: var(--font-cn);
}
.nav-links a:hover { color: var(--accent); }
.nav-status {
  display: flex; align-items: center; gap: 6px;
  margin-left: 24px;
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse-dot 2s infinite;
}
.status-dot.sm { width: 5px; height: 5px; }
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.status-text {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--accent); letter-spacing: 2px;
}

/* ====================================================
   HAMBURGER + MOBILE NAV
   ==================================================== */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: 1px solid var(--border-mid);
  padding: 8px 10px;
  cursor: pointer;
  margin-left: auto;
  flex-shrink: 0;
}
.nav-hamburger span {
  display: block;
  width: 20px; height: 1.5px;
  background: var(--accent);
  transition: all 0.3s;
  transform-origin: center;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.7);
  z-index: 1100;
  backdrop-filter: blur(4px);
  opacity: 0;
  transition: opacity 0.3s;
}
.mobile-nav-overlay.active {
  display: block;
  opacity: 1;
}
.mobile-nav {
  position: fixed;
  top: 0; right: 0;
  width: min(300px, 85vw);
  height: 100vh;
  background: var(--bg-dark);
  border-left: 1px solid var(--border-mid);
  z-index: 1200;
  display: flex;
  flex-direction: column;
  padding: 24px 0;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
  overflow-y: auto;
}
.mobile-nav.open {
  transform: translateX(0);
}
.mobile-nav-header {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 12px 28px 28px;
  font-size: 18px;
  font-weight: 900;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}
.mobile-nav-link {
  display: block;
  padding: 14px 28px;
  font-family: var(--font-cn);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 2px;
  color: var(--text-mid);
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, padding-left 0.2s, background 0.2s;
}
.mobile-nav-link:hover, .mobile-nav-link:active {
  color: var(--accent);
  padding-left: 36px;
  background: rgba(0,212,255,0.04);
}
.mobile-nav-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin: 24px 20px 0;
  padding: 14px 20px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-cn);
  font-size: 13px;
  letter-spacing: 2px;
  text-align: center;
  transition: all 0.3s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.mobile-nav-cta:hover {
  background: var(--accent);
  color: var(--bg-deep);
}

@media (max-width: 900px) {
  .nav-hamburger { display: flex; }
  .nav-status { margin-left: 0; }
}

/* ====================================================
   HERO
   ==================================================== */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 64px 40px 0;
  background: var(--bg-deep);
}

/* Grid Background */
.hero-bg-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 40% 50%, black 40%, transparent 80%);
}

/* Scan Line */
.hero-scan-line {
  position: absolute; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.4;
  animation: scan 6s linear infinite;
}
@keyframes scan {
  0% { top: 0; opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { top: 100%; opacity: 0; }
}

.hero-content {
  position: relative; z-index: 2;
  max-width: 700px;
  padding: 80px 0 80px 40px;
}
.hero-label {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent); letter-spacing: 3px;
  text-transform: uppercase; margin-bottom: 32px;
}
.label-line {
  display: inline-block; height: 1px; width: 40px;
  background: var(--accent); opacity: 0.5;
}
.label-line-sm {
  display: inline-block; height: 1px; width: 20px;
  background: var(--accent); opacity: 0.5;
}
.hero-title {
  margin-bottom: 24px;
  display: flex; flex-direction: column; gap: 8px;
}
.title-main {
  font-size: clamp(56px, 8vw, 96px);
  font-weight: 900;
  font-family: var(--font-cn);
  background: linear-gradient(135deg, #fff 0%, var(--accent) 60%, var(--accent2) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 4px;
  line-height: 1;
}
.title-sub {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 300;
  font-family: var(--font-cn);
  color: var(--text-mid);
  letter-spacing: 12px;
}
.hero-desc {
  font-size: 15px; color: var(--text-mid);
  line-height: 1.8; margin-bottom: 48px;
  font-family: var(--font-cn); letter-spacing: 1px;
  border-left: 2px solid var(--accent);
  padding-left: 16px;
}
.hero-stats {
  display: flex; gap: 0; margin-bottom: 48px;
}
.stat-item {
  flex: 1; padding: 0 24px;
  display: flex; flex-direction: column; gap: 4px;
}
.stat-item:first-child { padding-left: 0; }
.stat-divider {
  width: 1px; background: var(--border-mid);
  align-self: stretch;
}
.stat-num {
  font-family: var(--font-mono); font-size: 36px;
  color: var(--accent); line-height: 1;
}
.stat-unit {
  font-size: 18px; color: var(--text-mid);
  font-family: var(--font-mono);
}
.stat-label {
  font-size: 11px; color: var(--text-dim);
  font-family: var(--font-cn); letter-spacing: 1px;
  margin-top: 4px;
}
.hero-cta {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 32px;
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-size: 13px; font-weight: 600;
  letter-spacing: 3px; text-transform: uppercase;
  font-family: var(--font-cn);
  transition: all 0.3s;
  cursor: pointer;
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
}
.hero-cta:hover {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 0 30px rgba(0,212,255,0.4);
}
.hero-cta i { animation: bounce-down 2s infinite; }
@keyframes bounce-down {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* Hero drone image */
.hero-drone-img {
  position: absolute;
  right: -40px; top: 50%;
  transform: translateY(-45%);
  width: 60%;
  max-width: 900px;
  z-index: 1;
}
.hero-drone-img img {
  width: 100%; height: auto;
  object-fit: contain;
  filter: drop-shadow(0 0 60px rgba(0,212,255,0.2)) drop-shadow(0 40px 80px rgba(0,0,0,0.8));
  animation: float-drone 6s ease-in-out infinite;
  transition: transform 0.3s ease;
}
@keyframes float-drone {
  0%, 100% { transform: translateY(0) rotate(-1deg); }
  50% { transform: translateY(-20px) rotate(1deg); }
}
.drone-overlay-label {
  position: absolute;
  bottom: 15%;
  left: 10%;
  background: rgba(5, 7, 9, 0.85);
  border: 1px solid var(--border-mid);
  border-left: 3px solid var(--accent);
  padding: 10px 16px;
  backdrop-filter: blur(10px);
}
.ol-tag {
  display: block;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent); letter-spacing: 3px;
  text-transform: uppercase; margin-bottom: 4px;
}
.ol-desc {
  display: block;
  font-family: var(--font-cn); font-size: 12px;
  color: var(--text-mid); letter-spacing: 1px;
}

/* ====================================================
   TICKER
   ==================================================== */
.ticker-wrap {
  width: 100%;
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
  overflow: hidden;
  position: relative;
  z-index: 10;
}
.ticker-track {
  display: flex; gap: 32px;
  white-space: nowrap;
  animation: ticker-scroll 30s linear infinite;
}
.ticker-track span {
  font-family: var(--font-cn); font-size: 12px;
  color: var(--text-mid); letter-spacing: 2px;
  flex-shrink: 0;
}
.ticker-dot { color: var(--accent) !important; }
@keyframes ticker-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ====================================================
   SECTIONS COMMON
   ==================================================== */
.section-block {
  padding: 120px 40px;
  position: relative;
}
.section-block.dark-alt {
  background: var(--bg-alt);
}
.section-inner {
  max-width: 1400px; margin: auto;
}
.section-header {
  text-align: center; margin-bottom: 80px;
}
.section-tag {
  display: inline-block;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--accent); letter-spacing: 4px;
  text-transform: uppercase; margin-bottom: 16px;
}
.section-title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 900; font-family: var(--font-cn);
  color: var(--text-white); margin-bottom: 16px;
  letter-spacing: 2px;
}
.section-subtitle {
  font-size: 15px; color: var(--text-mid);
  font-family: var(--font-cn); letter-spacing: 1px;
}

/* ====================================================
   REVEAL ANIMATION
   ==================================================== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ====================================================
   ABOUT
   ==================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.showroom-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border: 1px solid var(--border);
}
.showroom-img-wrap img {
  transition: transform 0.6s ease;
}
.showroom-img-wrap:hover img { transform: scale(1.05); }
.img-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 12px 16px;
  background: linear-gradient(transparent, rgba(5,7,9,0.95));
  display: flex; gap: 12px; align-items: center;
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-mid); letter-spacing: 1px;
}
.caption-code {
  color: var(--accent); letter-spacing: 2px; font-size: 10px;
}
.about-lead {
  font-size: 17px; color: var(--text-white);
  font-family: var(--font-cn); line-height: 1.8;
  margin-bottom: 32px; letter-spacing: 0.5px;
}
.about-points {
  list-style: none; display: flex; flex-direction: column; gap: 20px;
  margin-bottom: 32px;
}
.about-points li {
  display: flex; gap: 16px; align-items: flex-start;
}
.about-points li i {
  width: 36px; height: 36px;
  background: rgba(0,212,255,0.08);
  border: 1px solid var(--border-mid);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; color: var(--accent); flex-shrink: 0;
  margin-top: 2px;
}
.about-points li strong {
  display: block; font-family: var(--font-cn);
  font-size: 14px; color: var(--text-white);
  letter-spacing: 1px; margin-bottom: 2px;
}
.about-points li span {
  font-size: 13px; color: var(--text-mid);
  font-family: var(--font-cn);
}
.compliance-badges {
  display: flex; gap: 8px; flex-wrap: wrap;
}
.badge {
  padding: 4px 12px;
  border: 1px solid var(--border-mid);
  background: rgba(0,212,255,0.05);
  font-family: var(--font-mono); font-size: 10px;
  color: var(--accent); letter-spacing: 2px;
  clip-path: polygon(6px 0, 100% 0, calc(100% - 6px) 100%, 0 100%);
}

/* ====================================================
   MARKET CARDS
   ==================================================== */
.market-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2px;
}
.market-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 40px 32px;
  display: flex; flex-direction: column; gap: 20px;
  position: relative; overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}
.market-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.4s ease;
}
.market-card:hover::before { transform: scaleX(1); }
.market-card:hover {
  border-color: var(--border-mid);
  transform: translateY(-4px);
}
.market-icon {
  width: 48px; height: 48px;
  background: rgba(0,212,255,0.08);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: var(--accent);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
}
.market-info h3 {
  font-size: 18px; font-family: var(--font-cn);
  color: var(--text-white); margin-bottom: 8px;
}
.market-info p {
  font-size: 12px; color: var(--text-mid);
  font-family: var(--font-cn); line-height: 1.6; margin-bottom: 16px;
}
.growth-bar {
  height: 3px; background: rgba(255,255,255,0.06);
  position: relative; overflow: hidden; margin-bottom: 8px;
}
.growth-fill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--accent2), var(--accent));
  transition: width 1.5s ease;
}
.growth-label {
  font-family: var(--font-mono); font-size: 11px;
  color: var(--text-mid); letter-spacing: 1px;
}
.growth-label strong { color: var(--accent); }

/* Market card learn-more link */
.market-card > a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--accent);
  text-transform: uppercase;
  border-bottom: 1px solid rgba(0,212,255,0.3);
  padding-bottom: 2px;
  transition: color 0.2s, border-color 0.2s, gap 0.2s;
  width: fit-content;
}
.market-card > a::after {
  content: '→';
  font-size: 12px;
  transition: transform 0.2s;
}
.market-card > a:hover {
  color: #fff;
  border-color: #fff;
  gap: 10px;
}

/* ====================================================
   PRODUCT ROWS
   ==================================================== */
.product-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--border);
}
.product-row:last-child { border-bottom: none; }
.product-row-reverse { direction: rtl; }
.product-row-reverse > * { direction: ltr; }

/* Product Image */
.product-img-col { position: relative; }
.product-img-wrap {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-card);
}
.product-img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.6s ease;
  filter: brightness(0.9);
}
.product-img-wrap:hover img {
  transform: scale(1.04);
  filter: brightness(1);
}

/* Spec Overlay */
.product-spec-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: linear-gradient(transparent, rgba(5,7,9,0.97));
  padding: 32px 20px 16px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}
.product-img-wrap:hover .product-spec-overlay {
  transform: translateY(0);
}
.spec-item {
  display: flex; flex-direction: column; gap: 2px;
}
.spec-k {
  font-family: var(--font-mono); font-size: 9px;
  color: var(--accent); letter-spacing: 2px; text-transform: uppercase;
}
.spec-v {
  font-family: var(--font-cn); font-size: 11px;
  color: var(--text-white); letter-spacing: 0.5px;
}
.product-img-label {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 0;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--text-dim); letter-spacing: 1px;
  border-bottom: 1px solid var(--border);
  margin-top: 4px;
}
.prod-code { color: var(--accent); letter-spacing: 2px; }

/* Product Text */
.product-text-col {
  display: flex; flex-direction: column; gap: 16px;
}
.prod-series-tag {
  font-family: var(--font-mono); font-size: 10px;
  letter-spacing: 4px; color: var(--accent);
  padding: 4px 12px;
  border: 1px solid var(--border-mid);
  display: inline-block;
  background: rgba(0,212,255,0.05);
}
.prod-series-tag.industrial { color: #ffa040; border-color: rgba(255,160,64,0.3); background: rgba(255,160,64,0.05); }
.prod-series-tag.agro { color: #40c080; border-color: rgba(64,192,128,0.3); background: rgba(64,192,128,0.05); }
.prod-series-tag.logistics { color: #a040ff; border-color: rgba(160,64,255,0.3); background: rgba(160,64,255,0.05); }

.prod-name {
  font-size: clamp(32px, 3vw, 48px);
  font-family: var(--font-en); font-weight: 800;
  color: var(--text-white); letter-spacing: -1px;
}
.prod-name em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.prod-tagline {
  font-size: 14px; color: var(--text-mid);
  font-family: var(--font-cn); letter-spacing: 2px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
}
.prod-desc {
  font-size: 14px; color: var(--text-mid);
  font-family: var(--font-cn); line-height: 1.9; letter-spacing: 0.5px;
}
.prod-features {
  list-style: none; display: flex; flex-direction: column; gap: 10px;
  margin-top: 8px;
}
.prod-features li {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; color: var(--text-mid);
  font-family: var(--font-cn); letter-spacing: 0.5px;
}
.prod-features li i {
  color: var(--accent); font-size: 12px; flex-shrink: 0;
}

/* Product learn-more button */
.prod-learn-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  padding: 10px 24px;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-cn);
  font-size: 13px;
  letter-spacing: 2px;
  transition: all 0.3s;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}
.prod-learn-more i { font-size: 11px; }
.prod-learn-more:hover {
  background: var(--accent);
  color: var(--bg-deep);
  box-shadow: 0 0 20px rgba(0,212,255,0.3);
}

/* ====================================================
   TECH SECTION
   ==================================================== */
.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
  margin-bottom: 80px;
}
.tech-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
}
.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 28px 24px;
  display: flex; flex-direction: column; gap: 12px;
  transition: border-color 0.3s, background 0.3s;
}
.tech-card:hover {
  border-color: var(--border-mid);
  background: var(--bg-card2);
}
.tech-card-icon {
  width: 40px; height: 40px;
  background: rgba(0,212,255,0.08);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; color: var(--accent);
}
.tech-card h4 {
  font-size: 14px; font-family: var(--font-cn);
  color: var(--text-white); letter-spacing: 1px;
}
.tech-card p {
  font-size: 12px; color: var(--text-mid);
  font-family: var(--font-cn); line-height: 1.7;
}

/* Packaging */
.packaging-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  padding-top: 60px;
  border-top: 1px solid var(--border);
}
.packaging-text {
  display: flex; flex-direction: column; gap: 16px;
}
.packaging-text h3 {
  font-size: clamp(24px, 2.5vw, 36px);
  font-family: var(--font-cn); color: var(--text-white);
  line-height: 1.3; letter-spacing: 1px;
}
.packaging-text p {
  font-size: 14px; color: var(--text-mid);
  font-family: var(--font-cn); line-height: 1.8;
}
.packaging-img { }

/* ====================================================
   BUSINESS MODEL
   ==================================================== */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}
.biz-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 48px 40px;
  display: flex; flex-direction: column; gap: 20px;
  position: relative; overflow: hidden;
  transition: border-color 0.3s, transform 0.3s;
}
.biz-card::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 50% 0, rgba(0,212,255,0.06), transparent 70%);
  opacity: 0; transition: opacity 0.3s;
}
.biz-card:hover::after { opacity: 1; }
.biz-card:hover { border-color: var(--border-mid); transform: translateY(-4px); }
.biz-badge {
  width: 56px; height: 56px;
  background: rgba(0,212,255,0.1);
  border: 1px solid var(--border-mid);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono); font-size: 13px;
  color: var(--accent); letter-spacing: 2px;
  font-weight: 700;
}
.biz-badge.b2b {
  background: rgba(255,160,64,0.08);
  border-color: rgba(255,160,64,0.3);
  color: #ffa040;
}
.biz-badge.b2c {
  background: rgba(160,64,255,0.08);
  border-color: rgba(160,64,255,0.3);
  color: #a040ff;
}
.biz-card h3 {
  font-size: 20px; font-family: var(--font-cn);
  color: var(--text-white); letter-spacing: 1px;
}
.biz-card ul {
  list-style: none; display: flex; flex-direction: column; gap: 10px;
}
.biz-card ul li {
  font-size: 13px; color: var(--text-mid);
  font-family: var(--font-cn); line-height: 1.6;
  padding-left: 16px; position: relative;
}
.biz-card ul li::before {
  content: '—';
  position: absolute; left: 0;
  color: var(--accent); font-size: 11px;
}

/* ====================================================
   FOOTER / CONTACT
   ==================================================== */
#contact {
  position: relative;
  background: var(--bg-dark);
  border-top: 1px solid var(--border);
  overflow: hidden;
}
.footer-grid-overlay {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.footer-inner {
  position: relative; z-index: 1;
  max-width: 1400px; margin: auto;
  padding: 100px 40px 60px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.footer-logo-block {
  display: flex; flex-direction: column; gap: 12px;
}
.footer-logo {
  display: flex; align-items: center; gap: 4px;
  font-family: var(--font-cn); font-weight: 900; font-size: 28px;
  letter-spacing: 3px;
}
.footer-logo-sub {
  font-family: var(--font-mono); font-size: 9px;
  color: var(--text-dim); letter-spacing: 3px;
  text-transform: uppercase;
}
.footer-slogan {
  font-family: var(--font-cn); font-size: 14px;
  color: var(--accent); letter-spacing: 4px;
  margin-top: 8px;
  padding: 6px 0;
  border-top: 1px solid var(--border);
}

/* Contact Cards */
.footer-contacts {
  display: flex; flex-direction: column; gap: 32px;
}
.footer-contacts-title {
  display: flex; align-items: center; gap: 12px;
  font-family: var(--font-cn); font-size: 12px;
  color: var(--text-mid); letter-spacing: 4px;
  text-transform: uppercase;
}
.contact-cards {
  display: flex; gap: 0;
  border: 1px solid var(--border);
  background: var(--bg-card);
}
.contact-card {
  flex: 1; padding: 28px 32px;
  display: flex; flex-direction: column; gap: 6px;
}
.contact-divider-v {
  width: 1px; background: var(--border); flex-shrink: 0;
}
.contact-role {
  font-family: var(--font-mono); font-size: 10px;
  color: var(--accent); letter-spacing: 3px;
  text-transform: uppercase;
}
.contact-name {
  font-size: 26px; font-family: var(--font-cn);
  font-weight: 700; color: var(--text-white);
  letter-spacing: 4px;
}
.contact-eng {
  font-size: 10px; color: var(--text-dim);
  font-family: var(--font-mono); letter-spacing: 1px;
}
.contact-line {
  display: flex; align-items: center; gap: 16px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.contact-line i {
  font-size: 28px; color: #00b900;
  flex-shrink: 0;
}
.contact-line .line-label {
  display: block;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--text-dim); letter-spacing: 3px;
  text-transform: uppercase; margin-bottom: 2px;
}
.contact-line .line-id {
  display: block;
  font-family: var(--font-mono); font-size: 22px;
  color: var(--text-white); letter-spacing: 3px;
}

/* Market Info */
.footer-market-info {
  display: flex; flex-direction: column; gap: 24px;
}
.footer-market-info h4 {
  font-size: 14px; font-family: var(--font-cn);
  color: var(--text-mid); letter-spacing: 3px;
  text-transform: uppercase;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.market-info-list {
  display: flex; flex-direction: column; gap: 16px;
}
.mi-item {
  display: flex; align-items: center; gap: 12px;
  font-size: 12px; color: var(--text-mid);
  font-family: var(--font-cn); letter-spacing: 0.5px;
}
.mi-item i {
  color: var(--accent); width: 14px; flex-shrink: 0;
}

/* Footer Bottom */
.footer-bottom {
  position: relative; z-index: 1;
  max-width: 1400px; margin: 0 auto;
  padding: 20px 40px;
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 10px;
  color: var(--text-dim); letter-spacing: 1px;
}
.footer-bottom-right {
  display: flex; align-items: center; gap: 8px;
  color: var(--accent);
}

/* ====================================================
   RESPONSIVE
   ==================================================== */
/* ====================================================
   RESPONSIVE — Tablet (max 1200px)
   ==================================================== */
@media (max-width: 1200px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .market-grid { grid-template-columns: repeat(2, 1fr); }
  .tech-layout { grid-template-columns: 1fr; gap: 40px; }
  .packaging-row { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-market-info { grid-column: auto; }
  .product-row { gap: 48px; }
}

/* ====================================================
   RESPONSIVE — Mobile Landscape (max 900px)
   ==================================================== */
@media (max-width: 900px) {
  /* Navbar */
  #navbar { padding: 0 16px; height: 56px; }
  .nav-links { display: none; }
  .logo-eng { display: none; }
  .nav-inner { gap: 16px; }

  /* Hero */
  #hero {
    min-height: 100svh;
    padding: 56px 0 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
  }
  .hero-content {
    padding: 48px 20px 48px;
    max-width: 100%;
    width: 100%;
  }
  .hero-drone-img {
    position: relative;
    right: auto; top: auto;
    transform: none;
    width: 100%;
    max-width: 100%;
    padding: 0 20px 40px;
  }
  .hero-drone-img img {
    animation: float-drone 6s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(0,212,255,0.2));
  }
  .drone-overlay-label {
    left: 30px; bottom: 50px;
  }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }
  .stat-divider { display: block; }
  .stat-item { padding: 0 12px; }
  .stat-item:first-child { padding-left: 0; }
  .stat-num { font-size: 28px; }

  /* Sections */
  .section-block { padding: 72px 20px; }
  .section-title { font-size: 28px; }
  .section-header { margin-bottom: 48px; }

  /* Products */
  .product-row {
    grid-template-columns: 1fr;
    gap: 32px;
    direction: ltr;
    padding: 48px 0;
  }
  .product-row-reverse { direction: ltr; }
  .product-img-wrap { aspect-ratio: 16/9; }
  .product-spec-overlay {
    transform: translateY(0);
    background: linear-gradient(transparent 0%, rgba(5,7,9,0.97) 30%);
    grid-template-columns: 1fr 1fr;
    padding: 24px 16px 12px;
  }
  .prod-name { font-size: 28px; }

  /* Market */
  .market-grid { grid-template-columns: repeat(2, 1fr); gap: 2px; }
  .market-card { padding: 28px 20px; }

  /* Tech */
  .tech-layout { grid-template-columns: 1fr; gap: 32px; }
  .tech-cards { grid-template-columns: repeat(2, 1fr); }

  /* Biz */
  .biz-grid { grid-template-columns: 1fr; gap: 2px; }
  .biz-card { padding: 32px 24px; }

  /* Packaging */
  .packaging-row { grid-template-columns: 1fr; gap: 32px; }

  /* Footer */
  .footer-inner {
    grid-template-columns: 1fr;
    padding: 60px 20px 40px;
    gap: 40px;
  }
  .footer-market-info { grid-column: auto; }
  .footer-bottom {
    padding: 16px 20px;
    font-size: 9px;
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

/* ====================================================
   RESPONSIVE — Mobile Portrait (max 600px)
   ==================================================== */
@media (max-width: 600px) {
  /* Navbar */
  #navbar { padding: 0 16px; height: 52px; }
  .nav-logo { font-size: 15px; }
  .logo-bracket { font-size: 18px; }
  .status-text { display: none; }

  /* Hero */
  #hero {
    padding-top: 52px;
    min-height: 100svh;
  }
  .hero-content {
    padding: 40px 16px 32px;
  }
  .hero-label {
    font-size: 9px;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
    justify-content: center;
  }
  .label-line { width: 24px; }
  .title-main {
    font-size: clamp(38px, 10vw, 52px);
    letter-spacing: 2px;
  }
  .title-sub {
    font-size: clamp(18px, 5vw, 26px);
    letter-spacing: 8px;
  }
  .hero-desc {
    font-size: 13px;
    margin-bottom: 28px;
  }
  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-bottom: 28px;
  }
  .stat-num { font-size: 22px; }
  .stat-unit { font-size: 14px; }
  .stat-label { font-size: 9px; }
  .stat-item { padding: 0 8px; }
  .stat-divider { display: block; }
  .hero-cta {
    padding: 12px 20px;
    font-size: 12px;
    letter-spacing: 2px;
    width: 100%;
    justify-content: center;
  }
  .hero-drone-img {
    padding: 0 0 32px;
  }
  .drone-overlay-label {
    left: 12px; bottom: 40px;
    padding: 8px 12px;
  }
  .ol-desc { font-size: 10px; }

  /* Sections */
  .section-block { padding: 60px 16px; }
  .section-title { font-size: 24px; letter-spacing: 1px; }
  .section-subtitle { font-size: 13px; }
  .section-header { margin-bottom: 40px; }

  /* About */
  .about-grid { gap: 32px; }
  .about-lead { font-size: 14px; }
  .about-points li i { width: 32px; height: 32px; font-size: 12px; }
  .about-points li strong { font-size: 13px; }

  /* Market */
  .market-grid { grid-template-columns: 1fr; }
  .market-card { padding: 24px 16px; }

  /* Products */
  .product-row { padding: 40px 0; gap: 24px; }
  .product-img-wrap { aspect-ratio: 4/3; }
  .prod-name { font-size: 24px; }
  .prod-desc { font-size: 13px; }
  .prod-features li { font-size: 12px; }
  .prod-series-tag { font-size: 9px; letter-spacing: 2px; }

  /* Tech */
  .tech-cards { grid-template-columns: 1fr; }
  .tech-card { padding: 20px; }
  .packaging-row { padding-top: 40px; }
  .packaging-text h3 { font-size: 22px; }

  /* Biz */
  .biz-card { padding: 24px 20px; }
  .biz-badge { width: 44px; height: 44px; font-size: 11px; }
  .biz-card h3 { font-size: 17px; }

  /* Contact / Footer */
  .footer-inner { padding: 48px 16px 32px; gap: 32px; }
  .footer-logo { font-size: 22px; }
  .contact-cards { flex-direction: column; }
  .contact-divider-v { display: none; }
  .contact-card { padding: 20px 24px; }
  .contact-name { font-size: 22px; letter-spacing: 3px; }
  .contact-line { padding: 16px 20px; }
  .contact-line .line-id { font-size: 18px; }
  .contact-line i { font-size: 22px; }
  .footer-bottom { padding: 14px 16px; gap: 6px; }
  .mi-item { font-size: 11px; }
  .footer-market-info h4 { font-size: 12px; }
}

/* ====================================================
   RESPONSIVE — Very Small (max 380px)
   ==================================================== */
@media (max-width: 380px) {
  .title-main { font-size: 34px; }
  .title-sub { font-size: 16px; letter-spacing: 5px; }
  .hero-stats { gap: 0; }
  .stat-num { font-size: 20px; }
  .stat-label { font-size: 8px; }
  .nav-logo { font-size: 13px; }
  .section-block { padding: 48px 12px; }
  .hero-content { padding: 36px 12px 28px; }
}