/* ============================================================
   Su WeiT — 青岛夙维彤网络科技有限公司
   Cyber/Nature Fusion Design System
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
  --bg-primary: #0F0F1A;
  --bg-surface: #1A1A2E;
  --bg-surface-alt: #141428;
  --accent-purple: #7C3AED;
  --accent-purple-glow: rgba(124, 58, 237, 0.35);
  --accent-blue: #3B82F6;
  --accent-blue-glow: rgba(59, 130, 246, 0.35);
  --accent-pink: #EC4899;
  --accent-pink-glow: rgba(236, 72, 153, 0.35);
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-bg-strong: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-accent: rgba(124, 58, 237, 0.25);
  --gradient-hero: linear-gradient(135deg, #0F0F1A 0%, #1A1035 30%, #0F1A2E 60%, #1A0F2E 100%);
  --gradient-card: linear-gradient(135deg, rgba(124, 58, 237, 0.12) 0%, rgba(59, 130, 246, 0.08) 50%, rgba(236, 72, 153, 0.06) 100%);
  --gradient-accent: linear-gradient(135deg, #7C3AED 0%, #3B82F6 50%, #EC4899 100%);
  --gradient-border: linear-gradient(135deg, #7C3AED, #3B82F6, #EC4899);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --transition-fast: 180ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --shadow-glow-purple: 0 0 30px rgba(124, 58, 237, 0.25), 0 0 60px rgba(124, 58, 237, 0.1);
  --shadow-glow-blue: 0 0 30px rgba(59, 130, 246, 0.25), 0 0 60px rgba(59, 130, 246, 0.1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3), 0 1px 4px rgba(255, 255, 255, 0.05);
  --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.4), 0 2px 8px rgba(255, 255, 255, 0.04);
}

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

html {
  scroll-behavior: smooth;
  scrollbar-width: thin;
  scrollbar-color: var(--accent-purple) var(--bg-surface);
  font-size: 100%;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-surface); }
::-webkit-scrollbar-thumb { background: var(--accent-purple); border-radius: 3px; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; color: inherit; }

/* --- Utility: Glass Card --- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
}

.glass-strong {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border-accent);
  border-radius: var(--radius-lg);
}

/* --- Utility: Gradient Text --- */
.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Utility: Reveal Animation --- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.container-narrow {
  max-width: 820px;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition-smooth);
}

.nav.scrolled {
  background: rgba(15, 15, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 10px 0;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  position: relative;
  padding: 4px 0;
  transition: color var(--transition-fast);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 1px;
  transition: width var(--transition-smooth);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a:focus-visible::after {
  width: 100%;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  background: var(--gradient-accent);
  border-radius: 50px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-purple);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: var(--transition-smooth);
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(15, 15, 26, 0.96);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 32px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-smooth);
}

.mobile-menu.active {
  opacity: 1;
  pointer-events: all;
}

.mobile-menu a {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.mobile-menu a:hover { color: var(--text-primary); }

.mobile-menu .nav-cta {
  margin-top: 12px;
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-hero);
  padding: 120px 24px 80px;
}

/* Animated gradient overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(124, 58, 237, 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 80% 30%, rgba(59, 130, 246, 0.1) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 50% 80%, rgba(236, 72, 153, 0.08) 0%, transparent 70%);
  animation: heroPulse 8s ease-in-out infinite alternate;
}

@keyframes heroPulse {
  0% { opacity: 0.7; }
  50% { opacity: 1; }
  100% { opacity: 0.7; }
}

/* Floating geometric shapes */
.hero-shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.shape {
  position: absolute;
  opacity: 0.15;
}

.shape-circle {
  border-radius: 50%;
  border: 2px solid var(--accent-purple);
  animation: floatUpDown 6s ease-in-out infinite;
}

.shape-triangle {
  width: 0;
  height: 0;
  border-left: 40px solid transparent;
  border-right: 40px solid transparent;
  border-bottom: 70px solid var(--accent-blue);
  animation: floatRotate 8s ease-in-out infinite;
}

.shape-ring {
  border-radius: 50%;
  border: 2px solid var(--accent-pink);
  animation: floatUpDown 7s ease-in-out infinite reverse;
}

.shape-square {
  border: 2px solid var(--accent-blue);
  animation: floatRotate 9s ease-in-out infinite;
}

.shape-dot {
  border-radius: 50%;
  background: var(--accent-purple);
  animation: floatDrift 5s ease-in-out infinite;
}

@keyframes floatUpDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-30px); }
}

@keyframes floatRotate {
  0%, 100% { transform: rotate(0deg) translateY(0); }
  50% { transform: rotate(15deg) translateY(-20px); }
}

@keyframes floatDrift {
  0%, 100% { transform: translate(0, 0); }
  33% { transform: translate(15px, -15px); }
  66% { transform: translate(-10px, 10px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-purple);
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.25);
  border-radius: 50px;
  margin-bottom: 32px;
  animation: fadeInUp 0.8s ease-out;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-purple);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.5); }
  50% { opacity: 0.6; box-shadow: 0 0 0 8px rgba(124, 58, 237, 0); }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease-out 0.1s both;
}

.hero h1 .line { display: block; }

.hero-description {
  font-size: 1.1875rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease-out 0.3s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  transition: all var(--transition-smooth);
  white-space: nowrap;
}

.btn-primary {
  background: var(--gradient-accent);
  color: var(--text-primary);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-purple);
}

.btn-glass {
  background: var(--glass-bg-strong);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--glass-border-accent);
  transform: translateY(-2px);
  box-shadow: 0 0 20px rgba(124, 58, 237, 0.15);
}

.btn-large {
  padding: 16px 40px;
  font-size: 1.0625rem;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.hero-scroll-indicator {
  width: 28px;
  height: 48px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  position: relative;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.hero-scroll-indicator:hover { border-color: var(--accent-purple); }

.hero-scroll-indicator::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 10px;
  background: var(--accent-purple);
  border-radius: 2px;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { top: 8px; opacity: 1; }
  50% { top: 24px; opacity: 0.3; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section {
  padding: 120px 24px;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 650px;
  margin: 0 auto 72px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent-purple);
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ============================================================
   SPLIT ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-geo {
  width: 100%;
  max-width: 480px;
  aspect-ratio: 1;
}

.about-geo svg {
  width: 100%;
  height: 100%;
}

.about-text h3 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about-text .accent-line {
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  border-radius: 2px;
  margin-bottom: 28px;
}

.about-text p {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-stats-mini {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}

.about-stat-mini {
  text-align: center;
  padding: 20px 12px;
  background: var(--glass-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.about-stat-mini:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-accent);
}

.about-stat-mini .stat-num {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-stat-mini .stat-label {
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================================
   GLASS SERVICE CARDS
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  position: relative;
  padding: 40px 32px;
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-smooth);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-border);
  opacity: 0;
  transition: opacity var(--transition-smooth);
}

.service-card:hover::before { opacity: 1; }

.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--glass-border-accent);
  box-shadow: var(--shadow-elevated);
}

.service-card:nth-child(1):hover { box-shadow: var(--shadow-glow-purple); }
.service-card:nth-child(2):hover { box-shadow: var(--shadow-glow-blue); }
.service-card:nth-child(3):hover { box-shadow: 0 0 30px rgba(236, 72, 153, 0.25), 0 0 60px var(--accent-pink-glow); }

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  font-size: 1.5rem;
}

.service-icon.purple { background: rgba(124, 58, 237, 0.15); color: var(--accent-purple); }
.service-icon.blue { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.service-icon.pink { background: rgba(236, 72, 153, 0.15); color: var(--accent-pink); }

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.service-card .service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-purple);
  transition: gap var(--transition-fast);
}

.service-card .service-link:hover { gap: 10px; }

.service-card:nth-child(2) .service-link { color: var(--accent-blue); }
.service-card:nth-child(3) .service-link { color: var(--accent-pink); }

/* ============================================================
   TABBED TECH SECTION
   ============================================================ */
.tech-section { background: var(--bg-surface-alt); }

.tech-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.tech-tab-btn {
  padding: 10px 24px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  transition: all var(--transition-smooth);
}

.tech-tab-btn:hover { color: var(--text-primary); border-color: var(--glass-border-accent); }

.tech-tab-btn.active {
  color: var(--text-primary);
  background: rgba(124, 58, 237, 0.15);
  border-color: var(--accent-purple);
  box-shadow: 0 0 16px rgba(124, 58, 237, 0.2);
}

.tech-tab-panel {
  display: none;
  animation: fadeSlideIn 0.5s ease-out;
}

.tech-tab-panel.active { display: block; }

@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.tech-item {
  display: flex;
  gap: 20px;
  padding: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-smooth);
}

.tech-item:hover {
  border-color: var(--glass-border-accent);
  transform: translateX(4px);
}

.tech-item-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 1.25rem;
}

.tech-item-icon.purple { background: rgba(124, 58, 237, 0.12); }
.tech-item-icon.blue { background: rgba(59, 130, 246, 0.12); }
.tech-item-icon.pink { background: rgba(236, 72, 153, 0.12); }

.tech-item-text h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.tech-item-text p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   VERTICAL TIMELINE (Process)
   ============================================================ */
.timeline {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(to bottom,
    transparent,
    var(--accent-purple) 5%,
    var(--accent-blue) 50%,
    var(--accent-pink) 95%,
    transparent
  );
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  display: flex;
  align-items: flex-start;
  margin-bottom: 60px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-item:nth-child(odd) {
  padding-right: calc(50% + 40px);
  text-align: right;
}

.timeline-item:nth-child(even) {
  padding-left: calc(50% + 40px);
  text-align: left;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 6px;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 3px solid var(--accent-purple);
  background: var(--bg-primary);
  z-index: 2;
  transition: all var(--transition-smooth);
}

.timeline-item:nth-child(2) .timeline-dot { border-color: var(--accent-blue); }
.timeline-item:nth-child(3) .timeline-dot { border-color: var(--accent-pink); }
.timeline-item:nth-child(4) .timeline-dot { border-color: var(--accent-purple); }

.timeline-item:hover .timeline-dot {
  box-shadow: 0 0 16px rgba(124, 58, 237, 0.5);
  transform: translateX(-50%) scale(1.3);
}

.timeline-item:nth-child(2):hover .timeline-dot { box-shadow: 0 0 16px rgba(59, 130, 246, 0.5); }
.timeline-item:nth-child(3):hover .timeline-dot { box-shadow: 0 0 16px rgba(236, 72, 153, 0.5); }

.timeline-content {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-smooth);
}

.timeline-item:hover .timeline-content {
  border-color: var(--glass-border-accent);
  box-shadow: var(--shadow-card);
}

.timeline-step {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-purple);
  margin-bottom: 8px;
}

.timeline-item:nth-child(2) .timeline-step { color: var(--accent-blue); }
.timeline-item:nth-child(3) .timeline-step { color: var(--accent-pink); }

.timeline-content h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.timeline-content p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ============================================================
   CIRCULAR PROGRESS METRICS
   ============================================================ */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  justify-items: center;
}

.metric-card {
  text-align: center;
  transition: transform var(--transition-smooth);
}

.metric-card:hover { transform: translateY(-6px); }

.metric-circle {
  position: relative;
  width: 140px;
  height: 140px;
  margin: 0 auto 20px;
}

.metric-circle svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.metric-circle .bg-ring {
  fill: none;
  stroke: rgba(255, 255, 255, 0.06);
  stroke-width: 8;
}

.metric-circle .progress-ring {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.metric-value {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.metric-value .value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.metric-value .suffix {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.metric-label {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
}

/* ============================================================
   CONTACT FORM (Centered Glass)
   ============================================================ */
.contact-section { background: var(--bg-surface-alt); }

.contact-wrapper {
  max-width: 640px;
  margin: 0 auto;
}

.contact-card {
  padding: 56px 48px;
  background: var(--glass-bg-strong);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border-accent);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group label .required {
  color: var(--accent-pink);
  margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
}

.form-input::placeholder,
.form-textarea::placeholder { color: var(--text-muted); }

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1.5l5 5 5-5' stroke='%2394A3B8' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  padding-right: 48px;
  cursor: pointer;
}

.form-select option {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.form-textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  background: var(--gradient-accent);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-smooth);
  margin-top: 8px;
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow-purple);
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.form-feedback {
  text-align: center;
  padding: 14px;
  border-radius: var(--radius-md);
  margin-top: 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  display: none;
}

.form-feedback.success {
  display: block;
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: #4ade80;
}

.form-feedback.error {
  display: block;
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: #f87171;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  padding: 80px 24px 40px;
  border-top: 1px solid var(--glass-border);
  background: var(--bg-surface-alt);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 20px;
  color: var(--text-muted);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col a {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  border-top: 1px solid var(--glass-border);
  font-size: 0.875rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom-links {
  display: flex;
  gap: 24px;
}

.footer-bottom-links a {
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.footer-bottom-links a:hover { color: var(--text-primary); }

/* ============================================================
   LEGAL PAGES
   ============================================================ */
.legal-page {
  padding: 160px 24px 100px;
  min-height: 100vh;
}

.legal-content {
  max-width: 780px;
  margin: 0 auto;
}

.legal-content h1 {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.legal-content .effective-date {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin-bottom: 40px;
}

.legal-content .intro-text {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  padding: 28px 32px;
  background: var(--glass-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.legal-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 44px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.legal-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 10px;
  color: var(--text-secondary);
}

.legal-content p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 18px;
}

.legal-content ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 20px;
}

.legal-content li {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.legal-content a {
  color: var(--accent-purple);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition-fast);
}

.legal-content a:hover { color: var(--accent-blue); }

.legal-content .back-home {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 40px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--accent-purple);
  transition: gap var(--transition-fast);
}

.legal-content .back-home:hover { gap: 12px; }

.legal-content .contact-block {
  margin-top: 40px;
  padding: 32px;
  background: var(--glass-bg);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.legal-content .contact-block h3 { margin-top: 0; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; gap: 56px; }
  .about-visual { order: -1; max-width: 360px; margin: 0 auto; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 48px; }
  .tech-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
}

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

  .hamburger { display: flex; }
  .mobile-menu { display: flex; }

  .hero { padding: 100px 20px 80px; }

  .section { padding: 80px 20px; }

  .timeline::before { left: 24px; }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    padding: 0 0 0 60px;
    text-align: left;
  }

  .timeline-dot { left: 24px; }

  .about-stats-mini { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .about-stat-mini { padding: 16px 8px; }

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

  .contact-card { padding: 36px 24px; }

  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 36px; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .legal-page { padding: 130px 20px 80px; }
  .legal-content h1 { font-size: 2rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .hero-description { font-size: 1rem; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .metrics-grid { grid-template-columns: 1fr; }
  .about-stats-mini { grid-template-columns: 1fr; }
  .tech-tabs { gap: 6px; }
  .tech-tab-btn { padding: 8px 16px; font-size: 0.8125rem; }
}