/* ================================================================
   中科数创（山东省）信息技术有限公司 · 门户网站样式
   设计语言：深色科技风 + 青蓝点缀 (#00E5FF)
   参考：青岛大佳&中科数创企业宣传PPT
   ================================================================ */

/* === CSS Variables / Theme === */
:root {
  --bg-primary: #0A0E1A;
  --bg-secondary: #111827;
  --bg-card: #1A1F2E;
  --bg-card-hover: #222A3E;
  --bg-section-alt: #0D1322;
  --text-primary: #FFFFFF;
  --text-secondary: #D1D5DB;
  --text-muted: #9CA3AF;
  --accent: #00E5FF;
  --accent-dim: rgba(0, 229, 255, 0.15);
  --accent-glow: rgba(0, 229, 255, 0.3);
  --border-color: rgba(255, 255, 255, 0.06);
  --border-accent: rgba(0, 229, 255, 0.2);
  --gradient-hero: linear-gradient(135deg, #0A0E1A 0%, #0D1B2A 40%, #0A1628 70%, #0A0E1A 100%);
  --gradient-accent: linear-gradient(135deg, #00E5FF, #00B8D4);
  --gradient-card: linear-gradient(145deg, rgba(26, 31, 46, 0.9), rgba(13, 19, 34, 0.95));
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 40px rgba(0, 229, 255, 0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --nav-height: 72px;
}

/* === Reset & Base === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* === Scrollbar === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: rgba(0, 229, 255, 0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0, 229, 255, 0.5); }

/* === Typography === */
.text-accent { color: var(--accent); }
.section {
  padding: 100px 0;
  position: relative;
}
.section:nth-child(even) { background: var(--bg-section-alt); }

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 60px;
}
.section-number {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 4px;
  color: var(--accent);
  margin-bottom: 12px;
  opacity: 0.8;
}
.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  outline: none;
}
.btn-primary {
  background: var(--gradient-accent);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
}
.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(0, 229, 255, 0.5);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid rgba(255, 255, 255, 0.2);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.1);
}
.btn-block { width: 100%; justify-content: center; }

/* ================================================================
   NAVIGATION
   ================================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: var(--transition);
  background: transparent;
}
.navbar.scrolled {
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  font-weight: 800;
  white-space: nowrap;
}
.nav-logo .logo-text { font-size: 0.95rem; }
.nav-logo .logo-sub { font-size: 0.95rem; font-weight: 600; }
.logo-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: 10px;
  color: var(--bg-primary);
  font-size: 1rem;
}
.logo-sub { color: var(--accent); font-weight: 400; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--accent);
  background: var(--accent-dim);
}
.nav-toggle { display: none; font-size: 1.5rem; cursor: pointer; color: var(--text-primary); }

/* ================================================================
   HERO
   ================================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(0, 229, 255, 0.06) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 100, 255, 0.04) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(0, 229, 255, 0.03) 0%, transparent 50%);
  z-index: 1;
}
.hero-bg-particles { position: absolute; inset: 0; z-index: 1; overflow: hidden; }
.hero-content {
  position: relative;
  z-index: 2;
  padding: 120px 0 80px;
  text-align: center;
}
.hero-badge {
  display: inline-block;
  padding: 6px 20px;
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 50px;
  font-size: 0.8rem;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-title {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
}
.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 60px; }
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  padding: 32px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
}
.stat-plus {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent);
}
.stat-label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* Particles */
.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent);
  border-radius: 50%;
  opacity: 0;
  animation: floatParticle linear infinite;
}
@keyframes floatParticle {
  0% { opacity: 0; transform: translateY(100vh) scale(0); }
  10% { opacity: 0.6; }
  90% { opacity: 0.6; }
  100% { opacity: 0; transform: translateY(-100px) scale(1); }
}

/* ================================================================
   ABOUT - TIMELINE + VMV
   ================================================================ */
.about { background: var(--bg-secondary); }
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto 80px;
  padding-left: 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent), rgba(0, 229, 255, 0.1));
}
.timeline-item {
  position: relative;
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeUp 0.6s forwards;
}
.timeline-item:nth-child(1) { animation-delay: 0.1s; }
.timeline-item:nth-child(2) { animation-delay: 0.2s; }
.timeline-item:nth-child(3) { animation-delay: 0.3s; }
.timeline-item:nth-child(4) { animation-delay: 0.4s; }
.timeline-item:nth-child(5) { animation-delay: 0.5s; }
@keyframes fadeUp { to { opacity: 1; transform: translateY(0); } }
.timeline-dot {
  position: absolute;
  left: -33px;
  top: 4px;
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  border: 3px solid var(--bg-secondary);
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
}
.timeline-dot-current {
  width: 16px;
  height: 16px;
  left: -35px;
  top: 2px;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 229, 255, 0.3); }
  50% { box-shadow: 0 0 40px rgba(0, 229, 255, 0.6); }
}
.timeline-year {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent);
  margin-bottom: 4px;
}
.timeline-year.current { font-size: 1.6rem; }
.timeline-content {
  padding: 0 0 0 20px;
}
.timeline-content h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.timeline-content p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Vision Mission Values */
.vmv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.vmv-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: var(--transition);
}
.vmv-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.vmv-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 12px;
  font-size: 1.2rem;
  margin-bottom: 20px;
}
.vmv-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 14px;
}
.vmv-card h3 span {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 4px;
}
.vmv-card > p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.values-list { display: flex; flex-direction: column; gap: 12px; }
.value-item {}
.value-item strong { color: var(--accent); font-size: 0.95rem; }
.value-item span { color: var(--text-muted); font-size: 0.8rem; margin-left: 4px; }
.value-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 2px;
  line-height: 1.5;
}

/* ================================================================
   BUSINESS
   ================================================================ */
.business { background: var(--bg-section-alt); }
.business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.biz-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  transition: var(--transition);
  opacity: 0;
  transform: translateY(30px);
}
.biz-card.aos-visible {
  animation: fadeUp 0.6s forwards;
}
.biz-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}
.biz-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 14px;
  font-size: 1.4rem;
  margin-bottom: 20px;
}
.biz-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.biz-card > p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.biz-features { display: flex; flex-direction: column; gap: 8px; }
.biz-features li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.biz-features li i {
  color: var(--accent);
  font-size: 0.75rem;
}

/* ================================================================
   AI CORE
   ================================================================ */
.ai-core { background: var(--bg-secondary); }

/* Three Pillars */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}
.pillar-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.pillar-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: var(--transition);
}
.pillar-card:hover::before { opacity: 1; }
.pillar-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-6px);
}
.pillar-center {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.pillar-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 50%;
  font-size: 1.5rem;
}
.pillar-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.pillar-en {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.pillar-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.pillar-line {
  width: 40px;
  height: 2px;
  background: var(--accent);
  margin: 16px auto 0;
  border-radius: 1px;
}

/* Research Loop */
.research-loop {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  margin-bottom: 60px;
}
.loop-title {
  text-align: center;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 36px;
  color: var(--accent);
}
.loop-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
}
.loop-item {
  flex: 1;
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.loop-item:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.loop-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 12px;
  font-size: 1.2rem;
}
.loop-item h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.loop-item p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.loop-arrow {
  flex-shrink: 0;
  padding: 0 16px;
  color: var(--accent);
  font-size: 1.5rem;
}
.loop-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.loop-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  text-align: center;
}
.loop-stat i {
  font-size: 1.5rem;
  color: var(--accent);
  margin-bottom: 4px;
}
.loop-stat span {
  font-size: 0.85rem;
  color: var(--text-muted);
}
.loop-stat strong {
  font-size: 0.9rem;
  color: var(--text-primary);
  font-weight: 700;
}

/* Application Domains */
.domains-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.domain-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.domain-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.domain-bg {
  height: 160px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.domain-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(10, 14, 26, 0.93));
}
.domain-content { padding: 24px; }
.domain-content h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.domain-content h3 i { color: var(--accent); }
.domain-content p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 14px;
}
.domain-tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
}

/*  ================================================================
  PRODUCTS
  ================================================================ */
.products { background: var(--bg-section); }
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s ease;
}
.product-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.1);
}
.product-img {
  height: 180px;
  background-size: cover;
  background-position: center;
  position: relative;
  border-bottom: 1px solid var(--card-border);
  cursor: pointer;
}
.product-img::after {
  content: '\f00e'; font-family: 'Font Awesome 6 Free'; font-weight: 900;
  position: absolute; top: 10px; right: 10px;
  width: 32px; height: 32px;
  background: rgba(0,0,0,0.5);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.7); font-size: 0.8rem;
  opacity: 0;
  transition: opacity .25s;
}
.product-card:hover .product-img::after { opacity: 1; }
.product-body { padding: 24px; }
.product-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.2);
  margin-bottom: 10px;
}
.product-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: #e0e8f0;
  margin-bottom: 8px;
}
.product-body p {
  font-size: 0.85rem;
  color: #8a9aaa;
  line-height: 1.6;
  margin-bottom: 16px;
}
.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.product-features span {
  font-size: 0.75rem;
  color: #6a8aaa;
  display: flex;
  align-items: center;
  gap: 4px;
}
.product-features span i { color: var(--accent); font-size: 0.65rem; }
.product-meta {
  display: flex;
  gap: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--card-border);
}
.product-meta span {
  font-size: 0.7rem;
  color: #5a7a9a;
  display: flex;
  align-items: center;
  gap: 4px;
}
.product-meta span i { color: var(--accent); opacity: 0.6; }

/* ================================================================
  CASES
  ================================================================ */
.cases { background: var(--bg-section-alt); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.case-card-wide { grid-column: span 2; }
.case-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.case-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.case-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  position: relative;
}
.case-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 30%, rgba(10, 14, 26, 0.92));
}
.case-body { padding: 24px; }
.case-body h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.5;
}
.case-challenge, .case-value {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 8px;
}
.case-challenge strong, .case-value strong {
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}

/* Certifications */
.cert-section {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
}
.cert-title {
  text-align: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 36px;
}
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cert-item {
  text-align: center;
  padding: 24px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.cert-item:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.cert-item i {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 12px;
  display: block;
}
.cert-item strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.cert-item span {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ================================================================
   PARTNERS
   ================================================================ */
.partners { background: var(--bg-secondary); }
.partner-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}
.partner-cat {
  text-align: center;
  padding: 32px 20px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  transition: var(--transition);
}
.partner-cat:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}
.partner-cat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 50%;
  font-size: 1.3rem;
}
.partner-cat h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.partner-cat p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.partner-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}
.partner-logo-item {
  width: 140px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1px;
  transition: var(--transition);
}
.partner-logo-item:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

/* ================================================================
   CONTACT
   ================================================================ */
.contact { background: var(--bg-section-alt); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info { display: flex; flex-direction: column; gap: 16px; }
.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.contact-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.contact-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: 10px;
  font-size: 1.1rem;
}
.contact-card strong {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2px;
  letter-spacing: 1px;
}
.contact-card p {
  font-size: 0.92rem;
  line-height: 1.6;
}
/* Contact Form */
.contact-form-wrapper {
  background: var(--gradient-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 32px;
}
.contact-form h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 24px;
  text-align: center;
}
.form-group { margin-bottom: 16px; }
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
}
.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  position: relative;
}
.footer-brand {
  flex: 1;
  min-width: 200px;
}
.footer-brand .logo-icon {
  display: inline-flex;
  margin-bottom: 12px;
}
.footer-brand .logo-text {
  display: inline-block;
  margin-left: 10px;
  font-weight: 800;
  font-size: 0.95rem;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 8px;
}
.footer-links {
  min-width: 150px;
}
.footer-links h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}
.footer-links a {
  display: block;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-bottom {
  width: 100%;
  padding-top: 24px;
  margin-top: 24px;
  border-top: 1px solid var(--border-color);
  text-align: center;
}
.footer-bottom p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ================================================================
   SCROLL TO TOP
   ================================================================ */
.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  color: var(--bg-primary);
  border: none;
  border-radius: 50%;
  font-size: 1rem;
  cursor: pointer;
  opacity: 0;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
}
.scroll-top.visible { opacity: 1; transform: translateY(0); }
.scroll-top:hover { transform: translateY(-4px); box-shadow: 0 6px 30px rgba(0, 229, 255, 0.5); }

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
  .vmv-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .pillars-grid { grid-template-columns: 1fr; }
  .partner-categories { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 26, 0.98);
    backdrop-filter: blur(20px);
    padding: 16px;
    gap: 4px;
    transform: translateY(-120%);
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
  }
  .nav-menu.active { transform: translateY(0); }
  .nav-toggle { display: block; }
  .nav-link { padding: 14px 20px; width: 100%; text-align: center; }

  .section { padding: 60px 0; }
  .section-title { font-size: 1.8rem; }

  .hero-stats { gap: 24px; }
  .hero-title { font-size: 2.2rem; }

  .business-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .domains-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .case-card-wide { grid-column: span 1; }
  .loop-flow { flex-direction: column; gap: 12px; }
  .loop-arrow { transform: rotate(90deg); padding: 8px 0; }
  .partner-categories { grid-template-columns: 1fr; }
  .cert-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-stats { gap: 16px; }
  .stat-num { font-size: 1.8rem; }
  .research-loop { padding: 28px 20px; }
}

/* ============================================
   LIGHTBOX
   ============================================ */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.88);
  backdrop-filter: blur(4px);
  align-items: center;
  justify-content: center;
}
.lightbox.active {
  display: flex;
}
.lightbox-img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: 8px;
  box-shadow: 0 12px 60px rgba(0,0,0,0.6);
  animation: lb-fade-in .3s ease;
}
@keyframes lb-fade-in {
  from { opacity: 0; transform: scale(.92); }
  to   { opacity: 1; transform: scale(1); }
}
.lightbox-close {
  position: fixed;
  top: 20px;
  right: 28px;
  width: 40px; height: 40px;
  background: rgba(255,255,255,0.12);
  border: none;
  border-radius: 8px;
  color: #fff;
  font-size: 1.3rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s;
  z-index: 10000;
}
.lightbox-close:hover {
  background: rgba(255,255,255,0.2);
}
.lightbox-caption {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.7);
  font-size: 0.9rem;
  background: rgba(0,0,0,0.5);
  padding: 8px 18px;
  border-radius: 20px;
  pointer-events: none;
}