/* ===== Design Tokens (Tech / Glassmorphism) ===== */
:root {
  --primary: #0080ff;
  --primary-dark: #0066cc;
  --primary-light: #33a3ff;
  --accent: #00d4ff;
  --accent-secondary: #22c55e;
  --accent-glow: rgba(0, 212, 255, 0.35);
  --neon-blue: rgba(0, 128, 255, 0.5);
  --bg-dark: #0a0a0f;
  --bg-darker: #030304;
  --bg-card: rgba(15, 17, 21, 0.72);
  --bg-card-solid: #0f1115;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border: rgba(0, 212, 255, 0.12);
  --border-hover: rgba(0, 212, 255, 0.35);
  --gradient: linear-gradient(135deg, #0080ff 0%, #00d4ff 50%, #22c55e 100%);
  --gradient-text: linear-gradient(135deg, #33a3ff 0%, #00d4ff 60%, #7dd3fc 100%);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
  --glow-sm: 0 0 20px rgba(0, 212, 255, 0.15);
  --glow-md: 0 0 30px rgba(0, 212, 255, 0.25), 0 0 60px rgba(0, 128, 255, 0.1);
  --glow-btn: 0 4px 24px rgba(0, 128, 255, 0.45), 0 0 40px rgba(0, 212, 255, 0.2);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --header-height: 72px;
  --font-heading: 'Space Grotesk', 'Noto Sans SC', sans-serif;
  --font-body: 'DM Sans', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  z-index: 0;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, rgba(0, 128, 255, 0.12), transparent);
  pointer-events: none;
  z-index: 0;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition);
}

ul {
  list-style: none;
}

h1, h2, h3, h4, .logo-text, .section-title {
  font-family: var(--font-heading);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 100px 0;
  position: relative;
}

.section-dark {
  background: var(--bg-dark);
}

.section-dark::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 50px;
  background: rgba(0, 212, 255, 0.05);
  text-shadow: 0 0 20px var(--accent-glow);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

.gradient-text {
  background: linear-gradient(100deg, #33a3ff, #00d4ff, #7dd3fc, #22c55e, #33a3ff);
  background-size: 250% 100%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 30px rgba(0, 212, 255, 0.3));
  animation: gradientFlow 8s ease infinite;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ===== Scroll Progress ===== */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--gradient);
  box-shadow: 0 0 12px var(--accent-glow);
  z-index: 1100;
  transition: width 0.1s linear;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-heading);
  border-radius: 50px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--gradient);
  color: white;
  box-shadow: var(--glow-btn);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, 0.15) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn-primary:hover::before {
  transform: translateX(100%);
}

.btn-primary:hover {
  box-shadow: 0 8px 32px rgba(0, 128, 255, 0.55), 0 0 50px rgba(0, 212, 255, 0.3);
}

.btn-outline {
  background: rgba(0, 212, 255, 0.04);
  color: var(--text-primary);
  border-color: var(--border-hover);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 255, 0.1);
  box-shadow: var(--glow-sm);
}

.btn-full {
  width: 100%;
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  transition: all var(--transition);
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: rgba(10, 10, 15, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4), var(--glow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  cursor: pointer;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  flex-shrink: 0;
  box-shadow: var(--glow-sm);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 12px;
  background: var(--gradient);
  opacity: 0.3;
  filter: blur(8px);
  z-index: -1;
}

.logo-icon svg {
  width: 22px;
  height: 22px;
}

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

.nav-links a {
  font-size: 0.95rem;
  color: var(--text-secondary);
  position: relative;
  cursor: pointer;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient);
  box-shadow: 0 0 8px var(--accent-glow);
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
  text-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
}

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

.nav-links a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 4px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    160deg,
    rgba(3, 3, 4, 0.95) 0%,
    rgba(10, 10, 15, 0.88) 45%,
    rgba(3, 3, 4, 0.82) 100%
  );
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.06) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 80%);
}

.hero-glow {
  position: absolute;
  top: 20%;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 128, 255, 0.15) 0%, transparent 70%);
  filter: blur(60px);
  animation: pulseGlow 6s ease-in-out infinite;
}

.hero-glow::after {
  content: '';
  position: absolute;
  bottom: -180px;
  left: -220px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(34, 197, 94, 0.12) 0%, transparent 70%);
  filter: blur(60px);
  animation: pulseGlow 8s ease-in-out infinite reverse;
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.1); }
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 60px 24px;
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.hero-tag::before {
  content: '';
  width: 32px;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -0.03em;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 60px;
}

.hero-stats {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  padding: 28px 36px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glow-sm);
}

.stat {
  display: flex;
  flex-direction: column;
  position: relative;
}

.stat:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -24px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40px;
  background: var(--border);
}

.stat-num {
  font-family: var(--font-mono);
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-suffix {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
  font-family: var(--font-mono);
  letter-spacing: 1px;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  letter-spacing: 2px;
}

.scroll-indicator {
  width: 24px;
  height: 40px;
  border: 2px solid var(--border-hover);
  border-radius: 12px;
  position: relative;
  box-shadow: var(--glow-sm);
}

.scroll-indicator::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--accent-glow);
  animation: scrollBounce 2s infinite;
}

@keyframes scrollBounce {
  0%, 100% { top: 8px; opacity: 1; }
  50% { top: 20px; opacity: 0.3; }
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-image::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-hover);
  z-index: 2;
  pointer-events: none;
}

.about-image img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

.about-badge {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  padding: 20px 28px;
  border-radius: var(--radius);
  text-align: center;
  border: 1px solid var(--border-hover);
  box-shadow: var(--glow-md);
  z-index: 3;
}

.badge-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 20px var(--accent-glow);
}

.badge-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.about-content h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.about-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.about-features {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.about-features li {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all var(--transition);
}

.about-features li:hover {
  background: rgba(0, 212, 255, 0.04);
  border-color: var(--border);
}

.feature-icon {
  width: 36px;
  height: 36px;
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
  border: 1px solid var(--border);
  box-shadow: var(--glow-sm);
}

.about-features strong {
  display: block;
  margin-bottom: 2px;
  font-family: var(--font-heading);
}

.about-features span {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* ===== Services ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all var(--transition);
  overflow: hidden;
  position: relative;
  cursor: pointer;
}

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

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

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

.service-num {
  position: absolute;
  top: 20px;
  right: 24px;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: rgba(0, 212, 255, 0.15);
  transition: color var(--transition);
  line-height: 1;
}

.service-card:hover .service-num {
  color: rgba(0, 212, 255, 0.4);
}

.service-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  position: relative;
}

.service-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), transparent);
}

.service-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-link {
  font-size: 0.9rem;
  color: var(--accent);
  font-weight: 500;
  font-family: var(--font-mono);
  cursor: pointer;
  transition: all var(--transition);
}

.service-link:hover {
  color: var(--primary-light);
  text-shadow: 0 0 12px var(--accent-glow);
}

/* ===== Solutions ===== */
.solutions-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 28px;
  background: rgba(0, 212, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 50px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-family: var(--font-heading);
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
  box-shadow: var(--glow-sm);
}

.tab-btn.active {
  background: var(--gradient);
  border-color: transparent;
  color: white;
  box-shadow: var(--glow-btn);
}

.tab-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.solution-panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.solution-panel.active {
  display: grid;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.solution-text h3 {
  font-size: 1.6rem;
  margin-bottom: 16px;
}

.solution-text p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.solution-text ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.solution-text li {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-secondary);
  padding: 8px 12px;
  border-radius: 8px;
  border-left: 2px solid var(--accent);
  background: rgba(0, 212, 255, 0.03);
}

.solution-text li::before {
  display: none;
}

.solution-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  border: 1px solid var(--border);
  box-shadow: var(--glow-sm);
}

.solution-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 128, 255, 0.15), transparent 60%);
  pointer-events: none;
}

.solution-image img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

/* ===== Cases ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.case-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--glow-md);
}

.case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.case-card:hover img {
  transform: scale(1.06);
}

.case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(3, 3, 4, 0.95) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 28px;
  transition: background var(--transition);
}

.case-card:hover .case-overlay {
  background: linear-gradient(to top, rgba(3, 3, 4, 0.98) 0%, rgba(0, 128, 255, 0.15) 100%);
}

.case-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 4px 12px;
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent);
  border: 1px solid var(--border-hover);
  border-radius: 20px;
  font-weight: 600;
  margin-bottom: 8px;
  width: fit-content;
  letter-spacing: 1px;
}

.case-overlay h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.case-overlay p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all var(--transition);
}

.contact-item:hover {
  background: rgba(0, 212, 255, 0.04);
  border-color: var(--border);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
  box-shadow: var(--glow-sm);
}

.contact-icon svg {
  width: 22px;
  height: 22px;
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
  font-family: var(--font-heading);
}

.contact-item p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.contact-map {
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-top: 8px;
  border: 1px solid var(--border);
  position: relative;
}

.contact-map::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 128, 255, 0.2), transparent);
  pointer-events: none;
}

.contact-map img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.contact-form {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 36px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--glow-sm);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  margin-bottom: 8px;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: rgba(3, 3, 4, 0.6);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-body);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1), var(--glow-sm);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2300d4ff' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: var(--gradient);
  box-shadow: 0 0 20px var(--accent-glow);
}

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

.footer-brand p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 16px;
  line-height: 1.7;
}

.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  font-family: var(--font-heading);
  color: var(--accent);
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a,
.footer-links li {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-links a {
  cursor: pointer;
}

.footer-links a:hover {
  color: var(--accent);
  text-shadow: 0 0 12px var(--accent-glow);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

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

.footer-bottom a:hover {
  color: var(--accent);
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--gradient);
  border: 1px solid var(--border-hover);
  border-radius: 50%;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition), visibility var(--transition), box-shadow var(--transition);
  z-index: 999;
  box-shadow: var(--glow-btn);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  box-shadow: 0 8px 32px rgba(0, 128, 255, 0.55), 0 0 50px rgba(0, 212, 255, 0.3);
}

.back-to-top:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ===== Animations on Scroll ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 网格子项错落入场 */
.services-grid .fade-in:nth-child(2) { transition-delay: 0.08s; }
.services-grid .fade-in:nth-child(3) { transition-delay: 0.16s; }
.services-grid .fade-in:nth-child(4) { transition-delay: 0.24s; }
.cases-grid .fade-in:nth-child(2) { transition-delay: 0.08s; }
.cases-grid .fade-in:nth-child(3) { transition-delay: 0.16s; }

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .stat:not(:last-child)::after {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 0;
    transform: translateY(-120%);
    opacity: 0;
    transition: all var(--transition);
    border-bottom: 1px solid var(--border);
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
  }

  .nav-links li {
    border-bottom: 1px solid var(--border);
  }

  .nav-links a {
    display: block;
    padding: 16px 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .about-grid,
  .solution-panel,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .about-image img {
    height: 280px;
  }

  .services-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .solution-image img {
    height: 240px;
  }

  .hero-stats {
    gap: 24px;
    padding: 20px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .hero-scroll {
    display: none;
  }

  .hero-glow {
    width: 300px;
    height: 300px;
  }
}