/* =====================================================
   TechData - Main Stylesheet
   Modern IT Company Website
   ===================================================== */

/* ---- CSS Variables ---- */
:root {
  --primary: #0057FF;
  --primary-dark: #003FCC;
  --primary-light: #4D8FFF;
  --secondary: #00C6FF;
  --accent: #7B2FFF;
  --dark: #0A0F1E;
  --dark-2: #111827;
  --dark-3: #1F2937;
  --gray-1: #374151;
  --gray-2: #6B7280;
  --gray-3: #9CA3AF;
  --gray-4: #D1D5DB;
  --gray-5: #F3F4F6;
  --white: #ffffff;
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  --gradient-purple: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.10);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.15);
  --shadow-xl: 0 20px 60px rgba(0,87,255,0.15);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 30px;
  --transition: all 0.3s ease;
  --font-main: 'Noto Sans KR', 'Inter', sans-serif;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  color: var(--dark);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ---- Container ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-main);
  font-weight: 600;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
  border: 2px solid transparent;
}
.btn-primary {
  background: var(--gradient);
  color: var(--white);
  padding: 12px 28px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
  filter: brightness(1.08);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
  padding: 12px 28px;
}
.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}
.btn-white {
  background: var(--white);
  color: var(--primary);
  padding: 14px 32px;
  font-size: 1rem;
}
.btn-white:hover {
  background: var(--gray-5);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.15);
}
.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.6);
  padding: 14px 32px;
  font-size: 1rem;
}
.btn-outline-white:hover {
  background: rgba(255,255,255,0.15);
  border-color: var(--white);
  transform: translateY(-2px);
}
.btn-lg { padding: 16px 40px; font-size: 1.05rem; }
.btn-sm { padding: 8px 20px; font-size: 0.875rem; }

/* ---- Section Defaults ---- */
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-header-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 50px;
  flex-wrap: wrap;
  gap: 16px;
}
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(0, 87, 255, 0.08);
  padding: 6px 16px;
  border-radius: 50px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  color: var(--dark);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 1.05rem;
  color: var(--gray-2);
  max-width: 600px;
  margin: 0 auto;
}

/* =====================================================
   HEADER
   ===================================================== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: transparent;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.header.scrolled {
  background: rgba(10, 15, 30, 0.97);
  backdrop-filter: blur(20px);
  box-shadow: 0 2px 20px rgba(0,0,0,0.2);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  font-size: 1.55rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}
.logo-tech { color: var(--white); }
.logo-data { color: var(--primary-light); }

/* Nav */
.nav { display: flex; align-items: center; }
.nav-list { display: flex; gap: 4px; align-items: center; }
.nav-item { position: relative; }
.nav-link {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 10px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-link:hover, .nav-item:hover > .nav-link {
  color: var(--white);
  background: rgba(255,255,255,0.08);
}
.nav-link.is-active {
  color: var(--primary-light);
  background: rgba(77,143,255,0.14);
}
.nav-link i { font-size: 0.65rem; transition: transform 0.3s; }
.nav-item:hover > .nav-link i { transform: rotate(180deg); }

/* Dropdown */
.dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 180px;
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease;
  z-index: 100;
  border: 1px solid rgba(0,0,0,0.06);
}
.nav-item:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.dropdown li a {
  display: block;
  padding: 9px 16px;
  font-size: 0.875rem;
  color: var(--gray-1);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  font-weight: 500;
}
.dropdown li a:hover {
  background: var(--gray-5);
  color: var(--primary);
  padding-left: 20px;
}

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

/* Hamburger */
.hamburger { display: none; flex-direction: column; gap: 5px; padding: 4px; }
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================
   HERO
   ===================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 70% at 60% 50%, rgba(0,87,255,0.18) 0%, transparent 70%),
              radial-gradient(ellipse 60% 50% at 10% 80%, rgba(0,198,255,0.10) 0%, transparent 60%),
              radial-gradient(ellipse 40% 40% at 90% 10%, rgba(123,47,255,0.12) 0%, transparent 50%),
              var(--dark);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,87,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,87,255,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  padding-top: 90px;
  padding-bottom: 80px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,87,255,0.15);
  border: 1px solid rgba(0,87,255,0.3);
  color: var(--primary-light);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 7px 16px;
  border-radius: 50px;
  margin-bottom: 28px;
}
.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}
.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: rgba(255,255,255,0.7);
  margin-bottom: 40px;
  max-width: 620px;
  line-height: 1.8;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 64px; }
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0;
  flex-wrap: wrap;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 24px 32px;
  backdrop-filter: blur(10px);
  width: fit-content;
}
.stat-item { text-align: center; padding: 0 28px; }
.stat-item:first-child { padding-left: 0; }
.stat-item:last-child { padding-right: 0; }
.stat-num {
  font-size: 2.4rem;
  font-weight: 900;
  color: var(--white);
  line-height: 1;
}
.stat-unit { font-size: 1.4rem; font-weight: 700; color: var(--primary-light); }
.stat-item p { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-top: 4px; }
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.15);
  flex-shrink: 0;
}
.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: 0.75rem;
  letter-spacing: 1px;
}
.scroll-arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid rgba(255,255,255,0.3);
  border-bottom: 2px solid rgba(255,255,255,0.3);
  transform: rotate(45deg);
  animation: scrollBounce 1.8s ease infinite;
}
@keyframes scrollBounce {
  0%, 100% { transform: rotate(45deg) translateY(0); opacity: 1; }
  50% { transform: rotate(45deg) translateY(6px); opacity: 0.5; }
}

/* Animations */
.animate-fade-up {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeUp 0.8s ease forwards;
}
.delay-1 { animation-delay: 0.15s; }
.delay-2 { animation-delay: 0.3s; }
.delay-3 { animation-delay: 0.45s; }
.delay-4 { animation-delay: 0.6s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* =====================================================
   PARTNERS MARQUEE
   ===================================================== */
.partners-marquee {
  background: var(--dark-2);
  padding: 16px 0;
  overflow: hidden;
  border-top: 1px solid rgba(255,255,255,0.06);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.marquee-track { overflow: hidden; }
.marquee-inner {
  display: flex;
  gap: 0;
  width: max-content;
  animation: marqueeScroll 30s linear infinite;
}
.marquee-inner span {
  padding: 8px 32px;
  color: rgba(255,255,255,0.35);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 1px;
  white-space: nowrap;
  border-right: 1px solid rgba(255,255,255,0.1);
  transition: color 0.3s;
}
.marquee-inner span:hover { color: rgba(255,255,255,0.8); }
@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* =====================================================
   BUSINESS SECTION
   ===================================================== */
.section-business { background: var(--gray-5); }
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.business-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  border: 1px solid rgba(0,0,0,0.06);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}
.business-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}
.business-card:hover::before { transform: scaleX(1); }
.business-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: transparent;
}
.business-card-icon {
  width: 60px;
  height: 60px;
  background: rgba(0,87,255,0.08);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.5rem;
  color: var(--primary);
  transition: var(--transition);
}
.business-card:hover .business-card-icon {
  background: var(--gradient);
  color: var(--white);
}
.business-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--dark);
}
.business-card p {
  font-size: 0.9rem;
  color: var(--gray-2);
  margin-bottom: 18px;
  line-height: 1.7;
}
.business-features { margin-bottom: 24px; }
.business-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--gray-1);
  padding: 4px 0;
}
.business-features i { color: var(--primary); font-size: 0.75rem; }
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}
.card-link:hover { gap: 10px; }
.card-link i { font-size: 0.75rem; }

/* CTA Card */
.card-cta {
  background: var(--gradient);
  color: var(--white);
}
.card-cta::before { display: none; }
.card-cta:hover { transform: translateY(-6px); box-shadow: var(--shadow-xl); }
.card-cta-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  height: 100%;
  justify-content: center;
  gap: 16px;
}
.card-cta-inner > i { font-size: 2.5rem; opacity: 0.9; }
.card-cta-inner h3 { font-size: 1.4rem; font-weight: 800; color: var(--white); margin: 0; }
.card-cta-inner p { color: rgba(255,255,255,0.8); font-size: 0.9rem; margin: 0; }

/* =====================================================
   WHY TECHDATA
   ===================================================== */
.section-why {
  background: var(--dark);
  position: relative;
  overflow: hidden;
}
.section-why-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 60% at 80% 50%, rgba(0,87,255,0.12) 0%, transparent 60%),
              radial-gradient(ellipse 40% 40% at 20% 80%, rgba(0,198,255,0.08) 0%, transparent 50%);
}
.section-why .section-header { position: relative; z-index: 1; }
.section-why .section-label {
  background: rgba(0,87,255,0.2);
  color: var(--primary-light);
}
.section-why .section-title { color: var(--white); }
.section-why .section-desc { color: rgba(255,255,255,0.6); }
.why-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.why-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.4s ease;
}
.why-item:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(0,87,255,0.3);
  transform: translateY(-4px);
}
.why-icon {
  width: 52px;
  height: 52px;
  background: var(--gradient);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--white);
  margin-bottom: 18px;
}
.why-item h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.why-item p { font-size: 0.875rem; color: rgba(255,255,255,0.55); line-height: 1.7; }

/* =====================================================
   SOLUTIONS TABS
   ===================================================== */
.section-solutions { background: var(--white); }
.solutions-tabs { margin-top: 20px; }
.tab-btns {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
  background: var(--gray-5);
  padding: 6px;
  border-radius: 50px;
  width: fit-content;
}
.tab-btn {
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--gray-2);
  transition: var(--transition);
  cursor: pointer;
}
.tab-btn.active, .tab-btn:hover {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-md);
}
.tab-btn.active { color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.solution-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.solution-text { }
.solution-badge {
  display: inline-block;
  background: rgba(0,87,255,0.1);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 16px;
}
.solution-badge.security { background: rgba(239,68,68,0.1); color: #EF4444; }
.solution-badge.infra { background: rgba(16,185,129,0.1); color: #10B981; }
.solution-badge.data { background: rgba(245,158,11,0.1); color: #F59E0B; }
.solution-text h3 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--dark);
  margin-bottom: 16px;
  line-height: 1.3;
}
.solution-text p {
  color: var(--gray-2);
  margin-bottom: 24px;
  line-height: 1.8;
}
.solution-list { margin-bottom: 32px; }
.solution-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 0.9rem;
  color: var(--gray-1);
  border-bottom: 1px dashed var(--gray-4);
}
.solution-list li:last-child { border: none; }
.solution-list i { color: var(--primary); flex-shrink: 0; }

/* Cloud Visual */
.solution-visual {
  background: var(--gray-5);
  border-radius: var(--radius-xl);
  padding: 50px 40px;
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.cloud-visual { }
.visual-card {
  position: absolute;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  box-shadow: var(--shadow-md);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--dark);
}
.visual-card i { font-size: 1.8rem; }
.visual-card.vc-1 { top: 15%; left: 10%; color: #FF9900; }
.visual-card.vc-2 { top: 15%; right: 10%; color: #0078D4; }
.visual-card.vc-3 { bottom: 20%; left: 50%; transform: translateX(-50%); color: #4285F4; }
.visual-center {
  width: 80px;
  height: 80px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
  box-shadow: 0 0 30px rgba(0,87,255,0.3);
  animation: pulse 2.5s ease infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0,87,255,0.3); }
  50% { box-shadow: 0 0 40px rgba(0,87,255,0.5); }
}

/* Security Visual */
.security-visual { flex-direction: column; }
.security-rings { position: relative; width: 200px; height: 200px; }
.ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  animation: rotateRing 8s linear infinite;
}
.r1 { width: 200px; height: 200px; border-color: rgba(0,87,255,0.15); animation-duration: 10s; }
.r2 { width: 140px; height: 140px; border-color: rgba(0,87,255,0.25); animation-duration: 7s; animation-direction: reverse; }
.r3 { width: 80px; height: 80px; border-color: rgba(0,87,255,0.4); animation-duration: 5s; }
.ring-center {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 50px; height: 50px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--white);
}
@keyframes rotateRing {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}
.security-dots { display: flex; gap: 16px; margin-top: 24px; }
.sdot {
  width: 44px; height: 44px;
  background: var(--white);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: var(--primary);
  box-shadow: var(--shadow-md);
}

/* Infra Visual */
.infra-visual { flex-direction: column; gap: 20px; }
.server-rack {
  background: var(--dark);
  border-radius: var(--radius-md);
  padding: 12px;
  width: 100%;
  max-width: 220px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid rgba(255,255,255,0.1);
}
.rack-unit {
  background: rgba(255,255,255,0.05);
  border-radius: 6px;
  padding: 8px 12px;
  border: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: space-between;
}
.rack-unit span { font-size: 0.7rem; color: rgba(255,255,255,0.4); font-weight: 600; }
.rack-unit.ru-active { border-color: rgba(0,87,255,0.4); }
.rack-unit.ru-active span { color: var(--primary-light); }
.rack-unit.ru-active::after {
  content: '';
  width: 6px; height: 6px;
  background: #00FF88;
  border-radius: 50%;
  animation: blink 1.5s ease infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.infra-metrics { width: 100%; max-width: 220px; display: flex; flex-direction: column; gap: 10px; }
.metric-bar { display: flex; align-items: center; gap: 8px; font-size: 0.75rem; color: var(--gray-2); }
.metric-bar span:first-child { width: 30px; }
.bar { flex: 1; height: 6px; background: var(--gray-4); border-radius: 3px; overflow: hidden; }
.fill { height: 100%; background: var(--gradient); border-radius: 3px; }
.metric-bar span:last-child { width: 32px; text-align: right; }

/* Data Visual */
.data-visual { flex-direction: column; gap: 24px; }
.data-flow { display: flex; align-items: center; gap: 8px; }
.data-node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-md);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-1);
  min-width: 72px;
  text-align: center;
}
.data-node i { font-size: 1.3rem; color: var(--primary); }
.data-arrow {
  flex: 1;
  height: 2px;
  background: var(--gradient);
  position: relative;
}
.data-arrow::after {
  content: '';
  position: absolute;
  right: -1px; top: 50%;
  transform: translateY(-50%);
  border-left: 6px solid var(--secondary);
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
}
.data-bars {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 80px;
  padding: 0 8px;
}
.dbar {
  flex: 1;
  background: var(--gradient);
  border-radius: 4px 4px 0 0;
  opacity: 0.7;
  animation: barGrow 0.8s ease forwards;
  transform-origin: bottom;
}
@keyframes barGrow {
  from { transform: scaleY(0); }
  to { transform: scaleY(1); }
}

/* =====================================================
   CASES
   ===================================================== */
.section-cases { background: var(--gray-5); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.case-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  border: 1px solid var(--gray-4);
  transition: all 0.3s ease;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.case-icon {
  width: 50px; height: 50px;
  background: rgba(0,87,255,0.08);
  border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; color: var(--primary);
  margin-bottom: 16px;
  transition: var(--transition);
}
.case-card:hover .case-icon { background: var(--gradient); color: var(--white); }
.case-card h4 { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.case-card p { font-size: 0.85rem; color: var(--gray-2); line-height: 1.6; margin-bottom: 14px; }
.case-tag {
  display: inline-block;
  background: rgba(0,87,255,0.08);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 50px;
}

/* =====================================================
   NEWS
   ===================================================== */
.section-news { background: var(--white); }
.news-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}
.news-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-4);
  transition: all 0.3s ease;
  background: var(--white);
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: transparent; }
.news-img-wrap { position: relative; overflow: hidden; }
.news-img {
  height: 200px;
  background-size: cover;
  background-position: center;
  transition: transform 0.5s ease;
}
.news-featured .news-img { height: 260px; }
.news-card:hover .news-img { transform: scale(1.05); }
.ni-cloud {
  background: linear-gradient(135deg, #0057FF 0%, #00C6FF 100%);
  position: relative;
}
.ni-cloud::after {
  content: '☁';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 4rem;
  opacity: 0.3;
}
.ni-security {
  background: linear-gradient(135deg, #7B2FFF 0%, #EF4444 100%);
  position: relative;
}
.ni-security::after {
  content: '🛡';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 3rem;
  opacity: 0.3;
}
.ni-data {
  background: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  position: relative;
}
.ni-data::after {
  content: '📊';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  font-size: 3rem;
  opacity: 0.3;
}
.news-cat {
  position: absolute;
  top: 14px; left: 14px;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 50px;
  letter-spacing: 0.5px;
}
.cloud-cat { background: rgba(0,87,255,0.9); color: var(--white); }
.security-cat { background: rgba(123,47,255,0.9); color: var(--white); }
.data-cat { background: rgba(245,158,11,0.9); color: var(--white); }
.news-body { padding: 22px 24px; }
.news-date { font-size: 0.78rem; color: var(--gray-3); margin-bottom: 10px; display: flex; align-items: center; gap: 6px; }
.news-card h3 { font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; line-height: 1.5; }
.news-featured h3 { font-size: 1.2rem; }
.news-card p { font-size: 0.85rem; color: var(--gray-2); line-height: 1.6; margin-bottom: 16px; }
.news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}
.news-link:hover { gap: 10px; }

/* =====================================================
   CTA BANNER
   ===================================================== */
.section-cta {
  position: relative;
  padding: 80px 0;
  overflow: hidden;
}
.cta-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #0A0F1E 0%, #003FCC 50%, #0A0F1E 100%);
}
.cta-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 80% at 30% 50%, rgba(0,198,255,0.15) 0%, transparent 60%),
              radial-gradient(ellipse 40% 60% at 70% 50%, rgba(123,47,255,0.1) 0%, transparent 60%);
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 10px;
}
.cta-text p { color: rgba(255,255,255,0.7); font-size: 1rem; }
.cta-btns { display: flex; gap: 14px; flex-wrap: wrap; }

/* =====================================================
   FOOTER
   ===================================================== */
.footer {
  background: var(--dark-2);
  padding: 64px 0 32px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr 2.5fr;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 36px;
}
.footer-logo { font-size: 1.5rem; font-weight: 900; display: block; margin-bottom: 14px; }
.footer-tagline { color: rgba(255,255,255,0.5); font-size: 0.875rem; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 38px; height: 38px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: var(--white); }
.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}
.footer-col h5 {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  transition: var(--transition);
}
.footer-col a:hover { color: var(--white); padding-left: 4px; }
.footer-bottom { display: flex; flex-direction: column; gap: 8px; }
.footer-info p { font-size: 0.78rem; color: rgba(255,255,255,0.35); line-height: 1.7; }
.footer-legal {
  display: flex;
  gap: 20px;
  margin: 8px 0;
}
.footer-legal a { font-size: 0.78rem; color: rgba(255,255,255,0.5); }
.footer-legal a:hover { color: var(--white); }
.footer-copy { font-size: 0.75rem; color: rgba(255,255,255,0.25); margin-top: 4px; }

/* =====================================================
   SCROLL TOP
   ===================================================== */
.scroll-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 46px;
  height: 46px;
  background: var(--gradient);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 900;
}
.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.scroll-top:hover { transform: translateY(-3px); box-shadow: var(--shadow-xl); }

/* =====================================================
   SCROLL REVEAL
   ===================================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =====================================================
   RESPONSIVE
   ===================================================== */
@media (max-width: 1024px) {
  .business-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .solution-feature { gap: 36px; }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .news-featured .news-img { height: 220px; }
  .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .footer-links { grid-template-columns: repeat(2, 1fr); gap: 28px; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  body.nav-open { overflow: hidden; }

  /* Header mobile */
  .nav {
    position: fixed;
    top: 72px; left: 0; right: 0; bottom: 0;
    background: var(--dark);
    padding: 24px;
    display: none;
    flex-direction: column;
    overflow-y: auto;
  }
  .nav.open { display: flex; }
  .nav-list { flex-direction: column; gap: 4px; align-items: stretch; }
  .nav-link { padding: 12px 16px; color: rgba(255,255,255,0.8); }
  .nav-link i { display: none; }
  .dropdown {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    margin-top: 4px;
    display: none;
  }
  .nav-item.open .dropdown { display: block; }
  .dropdown li a { color: rgba(255,255,255,0.6); padding: 10px 20px; }
  .dropdown li a:hover { background: rgba(255,255,255,0.08); color: var(--white); }
  .hamburger { display: flex; }
  .header-actions .btn-primary { display: none; }

  /* Hero */
  .hero-title { letter-spacing: -0.5px; }
  .hero-stats {
    width: 100%;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    padding: 20px;
  }
  .stat-divider { display: none; }
  .stat-item { padding: 12px; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .stat-item:nth-child(even) { border-left: 1px solid rgba(255,255,255,0.08); }
  .stat-item:last-child, .stat-item:nth-last-child(2) { border-bottom: none; }

  /* Grids */
  .business-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .solution-feature { grid-template-columns: 1fr; }
  .solution-visual { display: none; }
  .cases-grid { grid-template-columns: 1fr; }

  /* Footer */
  .footer-links { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-btns { justify-content: center; }

  /* Tabs */
  .tab-btns { width: 100%; justify-content: center; flex-wrap: wrap; border-radius: var(--radius-lg); }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; }
  .hero-btns .btn { width: 100%; justify-content: center; }
  .footer-links { grid-template-columns: 1fr; }
  .tab-btns { flex-direction: column; border-radius: var(--radius-md); }
  .tab-btn { text-align: center; border-radius: var(--radius-sm); }
  .news-grid { grid-template-columns: 1fr; }
}