/* ═══════════════════════════════════════════════════════════════
   Deep Ocean Data — Main Stylesheet
   Design System: Dark ocean theme, cyan-to-violet gradients
═══════════════════════════════════════════════════════════════ */

/* ── Reset & Base ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Chinese font stack applied when lang=zh */
html[lang="zh"] body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', var(--font-body);
}
html[lang="zh"] h1,
html[lang="zh"] h2,
html[lang="zh"] h3,
html[lang="zh"] h4 {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', var(--font-heading);
  letter-spacing: 0.02em;
}

/* zh-only: hidden in English, visible in Chinese */
.zh-only { display: none; }
html[lang="zh"] .zh-only { display: revert; }
html[lang="zh"] div.zh-only  { display: block; }
html[lang="zh"] span.zh-only { display: inline; }
html[lang="zh"] option.zh-only { display: block; }

:root {
  --bg-base:       #03070f;
  --bg-surface:    #070e1a;
  --bg-card:       #0a1628;
  --bg-card-hover: #0d1e36;
  --border:        rgba(0, 212, 255, 0.12);
  --border-hover:  rgba(0, 212, 255, 0.35);

  --cyan:   #00d4ff;
  --blue:   #0066ff;
  --violet: #7c3aed;
  --cyan-dim: rgba(0, 212, 255, 0.15);

  --text-primary:   #f0f6ff;
  --text-secondary: #7a9bbf;
  --text-muted:     #3d5a78;

  --font-body:    'Inter', sans-serif;
  --font-heading: 'Space Grotesk', sans-serif;

  --max-w: 1200px;
  --nav-h: 72px;
  --radius: 16px;
  --radius-sm: 10px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
}

/* ── Typography ── */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  line-height: 1.2;
  color: var(--text-primary);
}

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

.gradient-text {
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── Utility ── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 6rem 0;
}

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.3rem 1rem;
  margin-bottom: 1.5rem;
  background: rgba(0, 212, 255, 0.05);
}
.section-tag.centered { display: block; text-align: center; }

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: 1.25rem;
}
.section-title.centered { text-align: center; }

.section-desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 3.5rem;
}
.section-desc.centered {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

/* ── Buttons ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0, 212, 255, 0.55);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: 50px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
}
.btn-ghost:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  background: var(--cyan-dim);
}

.btn-full { width: 100%; justify-content: center; }


/* ════════════════════════════════════════════════════
   NAV
════════════════════════════════════════════════════ */
.nav-wrap {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(3, 7, 15, 0.7);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.nav-wrap.scrolled {
  background: rgba(3, 7, 15, 0.95);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.logo-text {
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
}
.nav-links a {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
}
.nav-links a:hover {
  color: var(--text-primary);
  background: rgba(255,255,255,0.05);
}
.btn-nav {
  background: linear-gradient(135deg, var(--cyan), var(--blue)) !important;
  color: #fff !important;
  border-radius: 50px !important;
  padding: 0.5rem 1.25rem !important;
  font-weight: 600 !important;
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.25);
}
.btn-nav:hover {
  box-shadow: 0 0 28px rgba(0, 212, 255, 0.5) !important;
  transform: translateY(-1px);
}
.nav-active {
  color: var(--cyan) !important;
}

/* ── Language Switcher ── */
.nav-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.lang-dropdown-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.lang-select {
  appearance: none;
  -webkit-appearance: none;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text-secondary);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 2rem 0.35rem 0.75rem;
  cursor: pointer;
  outline: none;
  transition: var(--transition);
  letter-spacing: 0.03em;
}
.lang-select:hover,
.lang-select:focus {
  border-color: var(--cyan);
  color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
}
.lang-select option {
  background: #0a1628;
  color: var(--text-primary);
  font-size: 0.85rem;
}

.lang-select-arrow {
  position: absolute;
  right: 0.55rem;
  pointer-events: none;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  transition: var(--transition);
}
.lang-dropdown-wrap:hover .lang-select-arrow,
.lang-select:focus ~ .lang-select-arrow {
  color: var(--cyan);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}


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

#hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  padding: 2rem;
  animation: fadeUp 1s ease both;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid var(--border);
  background: rgba(0,212,255,0.06);
  border-radius: 100px;
  padding: 0.35rem 1.1rem;
  margin-bottom: 2rem;
}
.badge-dot {
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

.hero-title {
  font-size: clamp(2.8rem, 6vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.stat-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  z-index: 1;
  animation: fadeIn 2s 1.5s ease both;
}
.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 1.5px solid var(--text-muted);
  border-bottom: 1.5px solid var(--text-muted);
  transform: rotate(45deg);
  animation: bounce 1.8s infinite;
}


/* ════════════════════════════════════════════════════
   ABOUT
════════════════════════════════════════════════════ */
.about {
  background: var(--bg-surface);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 1.1rem;
  font-size: 1.02rem;
}
.about-text strong { color: var(--text-primary); }

.about-cards {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  transition: var(--transition);
}
.card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-3px);
}
.card-glow:hover {
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.08);
}
.card-icon {
  font-size: 1.6rem;
  margin-bottom: 0.75rem;
}
.card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.offset-card { margin-left: 2rem; }


/* ════════════════════════════════════════════════════
   VISION / MISSION
════════════════════════════════════════════════════ */
.vision {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}
.vision::before {
  content: '';
  position: absolute;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,212,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.vision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.vision-block p,
.mission-block p {
  color: var(--text-secondary);
  font-size: 1.02rem;
}

.mission-pillars {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1.5rem;
}

.mission-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
}
.mission-num {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-muted);
  min-width: 2.5rem;
  line-height: 1;
  padding-top: 0.2rem;
}
.mission-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.35rem;
  color: var(--text-primary);
}
.mission-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}


/* ════════════════════════════════════════════════════
   TECHNOLOGY
════════════════════════════════════════════════════ */
.technology {
  background: var(--bg-surface);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.tech-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}
.tech-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  opacity: 0;
  transition: var(--transition);
}
.tech-card:hover::before { opacity: 1; }
.tech-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,212,255,0.07);
}

.tech-card-inner {
  padding: 2rem;
}

.tech-tag {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--bg-surface);
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  line-height: 1;
  user-select: none;
  transition: var(--transition);
}
.tech-card:hover .tech-tag {
  color: rgba(0,212,255,0.06);
}

.tech-icon-wrap {
  margin-bottom: 1.25rem;
}

.tech-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}
.tech-card p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.tech-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.tech-features li {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-left: 1rem;
  position: relative;
}
.tech-features li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--cyan);
  font-weight: 700;
}


/* ════════════════════════════════════════════════════
   MARKET
════════════════════════════════════════════════════ */
.market {
  background: var(--bg-base);
}

.market-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.market-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.market-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,212,255,0.07);
}

.market-card-featured {
  border-color: rgba(0, 212, 255, 0.3);
  background: linear-gradient(160deg, rgba(0,212,255,0.05) 0%, var(--bg-card) 60%);
}
.market-card-featured:hover {
  border-color: var(--cyan);
  box-shadow: 0 12px 50px rgba(0, 212, 255, 0.12);
}

.featured-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, var(--cyan), var(--blue));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 100px;
  padding: 0.25rem 0.9rem;
  white-space: nowrap;
}

.market-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.market-num {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  min-width: 2rem;
}
.market-header-text h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.2rem;
}
.market-tag {
  font-size: 0.73rem;
  color: var(--cyan);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.market-value {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}
.market-value strong { color: var(--text-primary); }

.market-detail {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.market-detail-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.83rem;
}
.detail-label {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.market-detail-item > span:last-child {
  color: var(--text-secondary);
}


/* ════════════════════════════════════════════════════
   NUMBERS
════════════════════════════════════════════════════ */
.numbers {
  background: var(--bg-surface);
  padding: 4rem 0;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.number-item {
  text-align: center;
  padding: 1.5rem;
}
.number-val {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  display: block;
}
.number-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}


/* ════════════════════════════════════════════════════
   FEATURE HIGHLIGHT
════════════════════════════════════════════════════ */
.feature-highlight {
  background: var(--bg-base);
  overflow: hidden;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

/* Animated visual */
.feature-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
}

.feature-orb {
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(0,212,255,0.6) 0%, rgba(0,102,255,0.3) 50%, transparent 70%);
  border-radius: 50%;
  position: absolute;
  animation: glow-pulse 3s ease-in-out infinite;
}

.feature-rings {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--border);
  animation: ring-pulse 4s linear infinite;
}
.ring-1 { width: 180px; height: 180px; animation-delay: 0s; }
.ring-2 { width: 280px; height: 280px; animation-delay: 0.8s; border-color: rgba(124, 58, 237, 0.15); }
.ring-3 { width: 380px; height: 380px; animation-delay: 1.6s; border-color: rgba(0, 212, 255, 0.06); }

.feature-data-nodes {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.data-node {
  position: absolute;
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.3rem 0.75rem;
  border-radius: 100px;
  white-space: nowrap;
  letter-spacing: 0.05em;
  animation: node-float 4s ease-in-out infinite;
}
.dn1 { top: 15%; left: 5%;  animation-delay: 0s;    }
.dn2 { top: 10%; right: 8%; animation-delay: 0.6s;  }
.dn3 { bottom: 20%; left: 0; animation-delay: 1.2s; }
.dn4 { bottom: 12%; right: 5%; animation-delay: 1.8s; }
.dn5 { top: 50%; left: -5%; animation-delay: 2.4s;  }

.feature-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 1.02rem;
}

.feature-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}
.feature-badge {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.3rem 0.9rem;
  background: var(--bg-card);
  transition: var(--transition);
}
.feature-badge:hover {
  border-color: var(--cyan);
  color: var(--cyan);
}


/* ════════════════════════════════════════════════════
   CONTACT
════════════════════════════════════════════════════ */
.contact {
  background: var(--bg-surface);
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 5rem;
  align-items: start;
}

.contact-info p {
  color: var(--text-secondary);
  font-size: 1.02rem;
  margin-bottom: 2rem;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.contact-icon {
  font-size: 1.1rem;
}

/* Form */
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.25rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.form-group label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 0.7rem 1rem;
  outline: none;
  transition: var(--transition);
  resize: none;
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237a9bbf' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}
.form-group select option {
  background: var(--bg-surface);
  color: var(--text-primary);
}


/* ════════════════════════════════════════════════════
   FOOTER
════════════════════════════════════════════════════ */
.footer {
  background: var(--bg-base);
  border-top: 1px solid var(--border);
  padding-top: 4rem;
  padding-bottom: 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.footer-brand .logo {
  margin-bottom: 1rem;
}
.footer-tagline {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.footer-links-group h4 {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}
.footer-links-group ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.footer-links-group a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-links-group a:hover {
  color: var(--cyan);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}
.footer-bottom-links a:hover {
  color: var(--text-secondary);
}


/* ════════════════════════════════════════════════════
   ANIMATIONS
════════════════════════════════════════════════════ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}
@keyframes bounce {
  0%, 100% { transform: rotate(45deg) translateY(0); }
  50%       { transform: rotate(45deg) translateY(5px); }
}
@keyframes glow-pulse {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50%       { transform: scale(1.15); opacity: 1; }
}
@keyframes ring-pulse {
  0%   { transform: scale(0.95); opacity: 0.6; }
  50%  { transform: scale(1.02); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.6; }
}
@keyframes node-float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-8px); }
}

/* Scroll-reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ════════════════════════════════════════════════════
   RESPONSIVE
════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .tech-grid { grid-template-columns: 1fr; }
  .market-grid { grid-template-columns: 1fr; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(3,7,15,0.98);
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    gap: 0.25rem;
  }

  .lang-select { font-size: 0.72rem; padding: 0.28rem 1.8rem 0.28rem 0.6rem; }

  .about-grid,
  .vision-grid,
  .feature-grid,
  .contact-wrap { grid-template-columns: 1fr; gap: 3rem; }

  .offset-card { margin-left: 0; }

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

  .footer-top { grid-template-columns: 1fr; }

  .footer-bottom {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .feature-visual { min-height: 280px; }
  .ring-3 { width: 280px; height: 280px; }

  .hero-stats { gap: 1.25rem; }
  .stat-divider { display: none; }
}

@media (max-width: 480px) {
  .container { padding: 0 1.25rem; }
  .section { padding: 4rem 0; }
  .numbers-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .contact-form { padding: 1.5rem; }
}


/* ════════════════════════════════════════════════════
   PRODUCTS SECTION
════════════════════════════════════════════════════ */
.products {
  background: var(--bg-base);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
  position: relative;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.product-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.07);
}
.product-card-featured {
  border-color: rgba(0, 212, 255, 0.3);
  background: linear-gradient(160deg, rgba(0,212,255,0.05) 0%, var(--bg-card) 60%);
}
.product-card-featured:hover {
  border-color: var(--cyan);
  box-shadow: 0 12px 50px rgba(0, 212, 255, 0.12);
}

.product-letter {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: -0.5rem;
}

.product-head {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.product-head h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}
.product-horizon {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.product-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.product-items {
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.product-item {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
}
.product-item-icon {
  font-size: 1.3rem;
  min-width: 1.8rem;
  margin-top: 0.1rem;
}
.product-item strong {
  display: block;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.2rem;
}
.product-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin: 0;
}


/* ════════════════════════════════════════════════════
   SERVICES — Extended Layout
════════════════════════════════════════════════════ */
.service-line-label {
  margin-bottom: 1.5rem;
  padding-left: 0.25rem;
  border-left: 3px solid var(--cyan);
  padding-left: 1rem;
}
.service-line-tag {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--cyan);
  display: block;
  margin-bottom: 0.3rem;
}
.service-line-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.tech-grid-3 { grid-template-columns: repeat(3, 1fr); }
.tech-grid-2 { grid-template-columns: repeat(2, 1fr); }
.tech-grid-1 { grid-template-columns: 1fr; }

.tech-card-wide .tech-card-inner {
  padding: 2rem;
}
.tech-card-inner-wide {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.tech-card-wide-content {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}
.tech-card-wide-content .tech-icon-wrap {
  min-width: 40px;
  margin-top: 0.15rem;
}
.tech-card-wide-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}
.tech-card-wide-content p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}


/* ════════════════════════════════════════════════════
   COMPETITIVE ADVANTAGES
════════════════════════════════════════════════════ */
.advantages {
  background: var(--bg-base);
  position: relative;
  overflow: hidden;
}
.advantages::before {
  content: '';
  position: absolute;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(124,58,237,0.05) 0%, transparent 65%);
  pointer-events: none;
}

.adv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.25rem 2rem;
  transition: var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.adv-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
  border-radius: 0 0 var(--radius) var(--radius);
  opacity: 0;
  transition: var(--transition);
}
.adv-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 212, 255, 0.07);
}
.adv-card:hover::after { opacity: 1; }

.adv-card-featured {
  border-color: rgba(0, 212, 255, 0.25);
  background: linear-gradient(160deg, rgba(0,212,255,0.04) 0%, var(--bg-card) 70%);
}
.adv-card-featured:hover {
  border-color: var(--cyan);
  box-shadow: 0 16px 50px rgba(0, 212, 255, 0.12);
}

.adv-icon-wrap {
  margin-bottom: 0.25rem;
}

.adv-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
}

.adv-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.adv-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.5rem;
}
.adv-highlights span {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 100px;
  padding: 0.25rem 0.75rem;
}


/* ════════════════════════════════════════════════════
   DIFFERENTIATORS SECTION
════════════════════════════════════════════════════ */
.diff-section {
  background: var(--bg-surface);
}

.diff-table {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.diff-header,
.diff-row {
  display: grid;
  grid-template-columns: 180px 1fr 1fr;
  border-bottom: 1px solid var(--border);
}
.diff-row:last-child { border-bottom: none; }

.diff-header {
  background: rgba(0, 212, 255, 0.04);
}

.diff-cell {
  padding: 1.25rem 1.5rem;
  border-right: 1px solid var(--border);
}
.diff-cell:last-child { border-right: none; }

/* Dimension column */
.diff-dim-col {
  background: rgba(0, 0, 0, 0.15);
  display: flex;
  align-items: center;
}
.diff-dim {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

/* Header badges */
.diff-col-badge {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 100px;
  padding: 0.3rem 0.85rem;
}
.diff-col-red {
  background: rgba(239, 68, 68, 0.1);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.2);
}
.diff-col-cyan {
  background: rgba(0, 212, 255, 0.1);
  color: var(--cyan);
  border: 1px solid rgba(0, 212, 255, 0.2);
}

/* Row content */
.diff-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 6px;
  padding: 0.2rem 0.6rem;
  margin-bottom: 0.5rem;
}
.diff-label-red {
  background: rgba(239, 68, 68, 0.08);
  color: #f87171;
}
.diff-label-cyan {
  background: rgba(0, 212, 255, 0.08);
  color: var(--cyan);
}
.diff-cell p {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}
.diff-old-col {
  background: rgba(239, 68, 68, 0.02);
}
.diff-new-col {
  background: rgba(0, 212, 255, 0.02);
}
.diff-row:hover .diff-old-col { background: rgba(239, 68, 68, 0.04); }
.diff-row:hover .diff-new-col { background: rgba(0, 212, 255, 0.04); }

/* ════════════════════════════════════════════════════
   RESPONSIVE ADDITIONS
════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .tech-grid-3 { grid-template-columns: 1fr; }
  .tech-grid-2 { grid-template-columns: 1fr; }
  .tech-card-wide-content { flex-direction: column; }
}

@media (max-width: 768px) {
  .products-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: 1fr; }
  .tech-grid-3 { grid-template-columns: 1fr; }
  .tech-grid-2 { grid-template-columns: 1fr; }
  .tech-features[style] { columns: 1 !important; }

  .diff-header,
  .diff-row {
    grid-template-columns: 1fr;
  }
  .diff-dim-col {
    background: rgba(0, 212, 255, 0.05);
    padding: 0.75rem 1.25rem;
  }
  .diff-cell { border-right: none; border-bottom: 1px solid var(--border); }
  .diff-cell:last-child { border-bottom: none; }
}