/* ===== Variables ===== */
:root {
  --bg-primary: #060a12;
  --bg-secondary: #0d1321;
  --bg-card: rgba(13, 19, 33, 0.75);
  --accent-cyan: #00e5ff;
  --accent-blue: #3b82f6;
  --accent-purple: #a855f7;
  --accent-pink: #ec4899;
  --accent-green: #10b981;
  --text-primary: #f0f4f8;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-color: rgba(0, 229, 255, 0.12);
  --glass-bg: rgba(10, 16, 30, 0.75);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Noto Sans SC', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 16px;
  --shadow-glow: 0 0 40px rgba(0, 229, 255, 0.15);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== Loader ===== */
.loader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s, visibility 0.5s;
}

.loader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }

.loader-inner { text-align: center; }

.loader-icon {
  display: block;
  font-family: var(--font-display);
  font-size: 3rem;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 24px;
  animation: loader-pulse 1.5s ease-in-out infinite;
}

@keyframes loader-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.8; }
}

.loader-bar {
  width: 200px;
  height: 3px;
  background: rgba(0, 229, 255, 0.15);
  border-radius: 2px;
  overflow: hidden;
  margin: 0 auto 12px;
}

.loader-progress {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  animation: loader-fill 1.8s ease forwards;
}

@keyframes loader-fill { to { width: 100%; } }

.loader-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  letter-spacing: 2px;
}

/* ===== Background ===== */
.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.025) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow {
  position: fixed;
  border-radius: 50%;
  filter: blur(140px);
  pointer-events: none;
  z-index: 0;
}

.bg-glow-1 { width: 700px; height: 700px; background: rgba(0, 229, 255, 0.07); top: -250px; right: -150px; }
.bg-glow-2 { width: 550px; height: 550px; background: rgba(168, 85, 247, 0.07); bottom: -200px; left: -150px; }
.bg-glow-3 { width: 400px; height: 400px; background: rgba(59, 130, 246, 0.05); top: 50%; left: 50%; transform: translate(-50%, -50%); }

#particles { position: fixed; inset: 0; pointer-events: none; z-index: 0; }

.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(6, 10, 18, 0.88);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-color);
  transition: box-shadow var(--transition);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 1px;
  z-index: 1001;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 8px;
  font-size: 1.2rem;
  color: var(--bg-primary);
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
  white-space: nowrap;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transition: width var(--transition);
}

.nav-links a:hover,
.nav-links a.active { color: var(--accent-cyan); }

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 80px;
  z-index: 1;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 3px;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 20px;
  margin-bottom: 24px;
}

.badge-dot {
  width: 6px; height: 6px;
  background: var(--accent-cyan);
  border-radius: 50%;
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 20px;
}

.gradient-text {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5.5vw, 4rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-blue) 45%, var(--accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.15;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.2rem);
  color: var(--text-secondary);
  font-weight: 400;
}

.hero-desc {
  max-width: 520px;
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: 1.85;
}

.hero-typing {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 32px;
  font-size: 0.95rem;
  min-height: 28px;
}

.typing-label { color: var(--text-muted); }
.typing-text { color: var(--accent-cyan); font-weight: 500; }

.typing-cursor {
  color: var(--accent-cyan);
  animation: cursor-blink 1s step-end infinite;
}

@keyframes cursor-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  font-size: 0.92rem;
  font-weight: 500;
  border-radius: 10px;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: var(--font-body);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: var(--bg-primary);
  box-shadow: 0 4px 24px rgba(0, 229, 255, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0, 229, 255, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.35);
}

.btn-outline:hover {
  background: rgba(0, 229, 255, 0.08);
  border-color: var(--accent-cyan);
}

.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-full { width: 100%; }

.hero-stats {
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}

.stat { display: flex; flex-direction: column; gap: 2px; }

.stat-num {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.stat-suffix {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent-cyan);
}

.stat-label { font-size: 0.8rem; color: var(--text-muted); }
.stat-divider { width: 1px; height: 36px; background: var(--border-color); }

/* Hero Visual */
.hero-visual {
  position: relative;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-orbit {
  position: relative;
  width: 340px;
  height: 340px;
}

.orbit-ring {
  position: absolute;
  border: 1px solid rgba(0, 229, 255, 0.12);
  border-radius: 50%;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}

.orbit-ring-1 { width: 300px; height: 300px; animation: rotate 25s linear infinite; }
.orbit-ring-2 { width: 220px; height: 220px; border-color: rgba(168, 85, 247, 0.18); animation: rotate 18s linear infinite reverse; }
.orbit-ring-3 { width: 140px; height: 140px; animation: rotate 12s linear infinite; }

.orbit-core {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 64px; height: 64px;
  background: radial-gradient(circle, var(--accent-cyan), var(--accent-purple));
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(0, 229, 255, 0.5), 0 0 120px rgba(168, 85, 247, 0.3);
  animation: core-pulse 3s ease-in-out infinite;
}

@keyframes rotate {
  from { transform: translate(-50%, -50%) rotate(0deg); }
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@keyframes core-pulse {
  0%, 100% { box-shadow: 0 0 60px rgba(0, 229, 255, 0.5), 0 0 120px rgba(168, 85, 247, 0.3); }
  50% { box-shadow: 0 0 80px rgba(0, 229, 255, 0.7), 0 0 160px rgba(168, 85, 247, 0.5); }
}

.hero-float {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  font-size: 0.82rem;
  animation: float 6s ease-in-out infinite;
}

.hero-float strong { display: block; font-size: 0.85rem; }
.hero-float small { color: var(--text-muted); font-size: 0.75rem; }
.float-icon { font-size: 1.3rem; }

.hero-float-1 { top: 10%; right: 0; animation-delay: 0s; }
.hero-float-2 { bottom: 25%; left: -5%; animation-delay: 2s; }
.hero-float-3 { bottom: 5%; right: 10%; animation-delay: 4s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.75rem;
  letter-spacing: 2px;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-cyan), transparent);
  animation: scroll-anim 2s ease-in-out infinite;
}

@keyframes scroll-anim {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== Marquee ===== */
.marquee-wrap {
  position: relative;
  z-index: 1;
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(6, 10, 18, 0.6);
  overflow: hidden;
}

.marquee { overflow: hidden; }

.marquee-track {
  display: flex;
  gap: 32px;
  animation: marquee 30s linear infinite;
  white-space: nowrap;
}

.marquee-track span {
  font-family: var(--font-display);
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.marquee-track span:nth-child(odd) { color: var(--accent-cyan); opacity: 0.7; }

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== Sections ===== */
.section {
  position: relative;
  padding: 100px 0;
  z-index: 1;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 4px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 14px;
}

.section-desc {
  color: var(--text-secondary);
  max-width: 580px;
  margin: 0 auto;
  font-size: 0.98rem;
  line-height: 1.7;
}

/* ===== About ===== */
.about-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
}

.about-intro {
  padding: 36px;
}

.about-intro h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--accent-cyan);
}

.about-intro p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 16px;
}

.about-values { margin-top: 28px; }

.value-item {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-top: 1px solid var(--border-color);
}

.value-num {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent-purple);
  flex-shrink: 0;
}

.value-item strong { display: block; margin-bottom: 4px; font-size: 0.95rem; }
.value-item p { color: var(--text-muted); font-size: 0.88rem; margin: 0; }

.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.about-card {
  padding: 24px 20px;
  transition: all var(--transition);
}

.about-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: var(--shadow-glow);
}

.about-icon {
  width: 42px; height: 42px;
  margin-bottom: 14px;
  padding: 8px;
  border-radius: 10px;
}

.about-icon.cyan { color: var(--accent-cyan); background: rgba(0, 229, 255, 0.1); }
.about-icon.purple { color: var(--accent-purple); background: rgba(168, 85, 247, 0.1); }
.about-icon.blue { color: var(--accent-blue); background: rgba(59, 130, 246, 0.1); }
.about-icon.pink { color: var(--accent-pink); background: rgba(236, 72, 153, 0.1); }

.about-icon svg { width: 100%; height: 100%; }
.about-card h3 { font-size: 1rem; margin-bottom: 8px; }
.about-card p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.65; }

/* ===== Advantages ===== */
.advantages { padding: 60px 0; }

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  padding: 32px;
  gap: 24px;
}

.advantage-item {
  text-align: center;
  padding: 16px;
}

.advantage-icon { font-size: 2rem; display: block; margin-bottom: 12px; }

.advantage-num {
  font-family: var(--font-display);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--accent-cyan);
  display: block;
}

.advantage-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 4px;
  display: block;
}

/* ===== Services ===== */
.services {
  background: linear-gradient(180deg, transparent, rgba(13, 19, 33, 0.6), transparent);
}

.service-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 22px;
  font-size: 0.88rem;
  font-family: var(--font-body);
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition);
}

.tab-btn:hover { color: var(--accent-cyan); border-color: rgba(0, 229, 255, 0.3); }

.tab-btn.active {
  color: var(--bg-primary);
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border-color: transparent;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  padding: 28px 24px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card.hidden { display: none; }

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: var(--shadow-glow);
}

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

.service-icon {
  width: 40px; height: 40px;
  color: var(--accent-cyan);
  margin-bottom: 14px;
}

.service-icon svg { width: 100%; height: 100%; }

.service-num {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent-purple);
  letter-spacing: 2px;
  margin-bottom: 8px;
  display: block;
}

.service-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}

.service-card > p {
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.65;
  margin-bottom: 14px;
}

.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.service-tags li {
  font-size: 0.72rem;
  padding: 3px 10px;
  background: rgba(0, 229, 255, 0.08);
  color: var(--accent-cyan);
  border-radius: 12px;
  border: 1px solid rgba(0, 229, 255, 0.15);
}

/* ===== Tech ===== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tech-category {
  padding: 28px 24px;
  transition: all var(--transition);
}

.tech-category:hover {
  border-color: rgba(0, 229, 255, 0.3);
  transform: translateY(-3px);
}

.tech-category h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--accent-cyan);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tech-tags span {
  font-size: 0.8rem;
  padding: 5px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.tech-tags span:hover {
  color: var(--accent-cyan);
  border-color: rgba(0, 229, 255, 0.3);
  background: rgba(0, 229, 255, 0.06);
}

/* ===== Solutions ===== */
.solutions {
  background: linear-gradient(180deg, transparent, rgba(13, 19, 33, 0.4), transparent);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.solution-card {
  padding: 28px 24px;
  transition: all var(--transition);
}

.solution-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: var(--shadow-glow);
}

.solution-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.solution-icon { font-size: 1.8rem; }
.solution-card h3 { font-size: 1.05rem; }

.solution-card > p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 16px;
}

.solution-card ul li {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 6px 0;
  padding-left: 16px;
  position: relative;
}

.solution-card ul li::before {
  content: '▸';
  position: absolute;
  left: 0;
  color: var(--accent-cyan);
  font-size: 0.7rem;
}

/* ===== Process ===== */
.process-timeline {
  display: flex;
  align-items: flex-start;
  gap: 0;
  overflow-x: auto;
  padding-bottom: 16px;
}

.process-step {
  flex: 1;
  min-width: 180px;
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}

.process-step:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.35);
}

.step-num {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  display: block;
}

.process-step h3 { font-size: 0.95rem; margin-bottom: 10px; }

.process-step p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.process-connector {
  width: 40px;
  min-width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  margin-top: 48px;
  opacity: 0.4;
}

/* ===== Cases ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.case-card {
  overflow: hidden;
  transition: all var(--transition);
  padding: 0;
}

.case-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.case-image {
  height: 180px;
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}

.case-image-1 { background: linear-gradient(135deg, #0c4a6e 0%, #1e3a5f 50%, #312e81 100%); }
.case-image-2 { background: linear-gradient(135deg, #064e3b 0%, #0c4a6e 50%, #1e1b4b 100%); }
.case-image-3 { background: linear-gradient(135deg, #4a1d6a 0%, #1e3a5f 50%, #0c4a6e 100%); }
.case-image-4 { background: linear-gradient(135deg, #1e3a5f 0%, #312e81 50%, #4a1d6a 100%); }

.case-badge {
  font-size: 0.75rem;
  padding: 4px 12px;
  background: rgba(0, 229, 255, 0.2);
  color: var(--accent-cyan);
  border-radius: 12px;
  border: 1px solid rgba(0, 229, 255, 0.3);
}

.case-body { padding: 24px; }

.case-body h3 { font-size: 1.05rem; margin-bottom: 10px; }

.case-body > p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.65;
  margin-bottom: 16px;
}

.case-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.case-meta span {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item { overflow: hidden; }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  transition: color var(--transition);
}

.faq-question:hover { color: var(--accent-cyan); }

.faq-arrow {
  width: 20px; height: 20px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item.active .faq-arrow { transform: rotate(180deg); color: var(--accent-cyan); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer { max-height: 300px; }

.faq-answer p {
  padding: 0 24px 20px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta { padding: 60px 0; }

.cta-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 48px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(168, 85, 247, 0.08));
}

.cta-content h2 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  margin-bottom: 10px;
}

.cta-content p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  max-width: 520px;
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 24px;
}

.contact-info,
.contact-form-wrap { padding: 36px; }

.contact-info h3,
.contact-form-wrap h3 {
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.form-desc {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 24px;
}

.contact-list li {
  display: flex;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
}

.contact-list li:last-child { border-bottom: none; }

.contact-icon { font-size: 1.3rem; flex-shrink: 0; }

.contact-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 2px;
}

.contact-value { font-size: 0.95rem; }

.contact-scope {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border-color);
}

.contact-scope h4 {
  font-size: 0.9rem;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.contact-scope p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.contact-form { display: flex; flex-direction: column; gap: 18px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group label {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.9rem;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: rgba(0, 229, 255, 0.4);
}

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

.form-group select { cursor: pointer; }
.form-group select option { background: var(--bg-secondary); }
.form-group textarea { resize: vertical; min-height: 100px; }

.form-success {
  text-align: center;
  padding: 40px 20px;
}

.success-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px; height: 56px;
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-green);
  border-radius: 50%;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.form-success p { color: var(--text-secondary); }

/* ===== Footer ===== */
.footer {
  position: relative;
  z-index: 1;
  padding: 60px 0 32px;
  border-top: 1px solid var(--border-color);
  background: rgba(6, 10, 18, 0.95);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  margin-bottom: 14px;
}

.footer-about p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.9rem;
  margin-bottom: 16px;
  color: var(--text-primary);
}

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

.footer-col ul li,
.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-col ul li a:hover { color: var(--accent-cyan); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copy { font-size: 0.82rem; color: var(--text-muted); }

.footer-beian a {
  font-size: 0.82rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

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

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  border: none;
  border-radius: 12px;
  color: var(--bg-primary);
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

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

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 229, 255, 0.35);
}

.back-to-top svg { width: 20px; height: 20px; }

/* ===== Animations ===== */
.fade-in {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }

/* ===== Responsive ===== */
@media (max-width: 1100px) {
  .nav-links { gap: 18px; }
  .nav-links a { font-size: 0.8rem; }
}

@media (max-width: 1024px) {
  .hero-layout { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { height: 300px; order: -1; }
  .hero-orbit { width: 260px; height: 260px; }
  .orbit-ring-1 { width: 240px; height: 240px; }
  .orbit-ring-2 { width: 170px; height: 170px; }
  .orbit-ring-3 { width: 100px; height: 100px; }
  .hero-float-2 { left: 0; }

  .about-layout { grid-template-columns: 1fr; }
  .about-cards { grid-template-columns: repeat(2, 1fr); }

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

  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }

  .cta-banner { flex-direction: column; text-align: center; padding: 36px; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 28px;
    background: rgba(6, 10, 18, 0.98);
    backdrop-filter: blur(24px);
    border-left: 1px solid var(--border-color);
    transition: right var(--transition);
  }

  .nav-links.active { right: 0; }

  .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); }

  .hero { min-height: auto; padding: 100px 0 60px; }
  .hero-scroll { display: none; }
  .hero-visual { display: none; }

  .stat-divider { display: none; }
  .hero-stats { gap: 20px; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }

  .about-cards,
  .services-grid,
  .tech-grid,
  .solutions-grid,
  .cases-grid { grid-template-columns: 1fr; }

  .advantages-grid { grid-template-columns: repeat(2, 1fr); padding: 24px 16px; }

  .process-timeline { flex-direction: column; align-items: stretch; }
  .process-connector { width: 2px; height: 24px; margin: 0 auto; }

  .section { padding: 70px 0; }
  .section-header { margin-bottom: 36px; }

  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .back-to-top { bottom: 20px; right: 20px; }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .about-intro,
  .contact-info,
  .contact-form-wrap { padding: 24px 20px; }
  .service-tabs { gap: 8px; }
  .tab-btn { padding: 8px 16px; font-size: 0.82rem; }
}