/* ===== CSS Variables ===== */
:root {
  --bg-primary: #070709;
  --bg-secondary: #0f0f13;
  --bg-card: #14141b;
  --bg-glass: rgba(20, 20, 30, 0.7);
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --text-muted: #606070;
  --accent-cyan: #00f0ff;
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --accent-gradient: linear-gradient(135deg, #00f0ff, #a855f7, #3b82f6);
  --border-color: rgba(255,255,255,0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --transition: 0.3s ease;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

/* ===== Utilities ===== */
.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
}

.section-padding { padding: 100px 0; }

.accent-text {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

/* ===== Header / Nav ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
.header.scrolled {
  background: rgba(7, 7, 9, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--accent-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: #fff;
}
.nav { display: flex; align-items: center; gap: 32px; }
.nav-links { display: flex; gap: 28px; }
.nav-links a {
  font-size: 0.9rem;
  color: var(--text-secondary);
  position: relative;
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text-primary); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--accent-gradient);
  transition: var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: transparent;
  transition: var(--transition);
}
.lang-switch:hover { border-color: var(--accent-cyan); color: var(--text-primary); }
.lang-switch .divider { color: var(--text-muted); }
.lang-switch .lang-btn { transition: var(--transition); }
.lang-switch .lang-btn.active { color: var(--accent-cyan); font-weight: 600; }

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none; border: none;
}
.mobile-menu-btn span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(168,85,247,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0,240,255,0.1) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(59,130,246,0.1) 0%, transparent 50%);
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(circle at center, black 30%, transparent 80%);
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 32px;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 8px #22c55e;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(1.2); }
}
.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: -1px;
}
.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(59,130,246,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(59,130,246,0.4); }
.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}
.btn-outline:hover { border-color: var(--accent-cyan); background: rgba(0,240,255,0.05); }

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  margin-top: 80px;
  flex-wrap: wrap;
}
.hero-stat h3 {
  font-size: 2rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-stat p { font-size: 0.85rem; color: var(--text-secondary); margin-top: 4px; }

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 700;
  margin-bottom: 16px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 24px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0;
  transition: var(--transition);
}
.card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.15); }
.card:hover::before { opacity: 1; }
.card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(0,240,255,0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}
.card h3 { font-size: 1.2rem; font-weight: 600; margin-bottom: 10px; }
.card p { color: var(--text-secondary); font-size: 0.95rem; }

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.about-visual {
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.about-visual .glow {
  position: absolute;
  width: 300px; height: 300px;
  border-radius: 50%;
  background: var(--accent-gradient);
  filter: blur(80px);
  opacity: 0.3;
}
.about-visual .orbit {
  width: 280px; height: 280px;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  position: relative;
  animation: rotate 20s linear infinite;
}
.about-visual .orbit::before {
  content: '';
  position: absolute;
  top: -6px; left: 50%;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 12px var(--accent-cyan);
  transform: translateX(-50%);
}
@keyframes rotate { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.about-visual .center-icon {
  position: absolute;
  font-size: 3rem;
  color: var(--text-primary);
}
.about-content h2 { font-size: clamp(1.8rem, 3vw, 2.8rem); font-weight: 700; margin-bottom: 20px; }
.about-content p { color: var(--text-secondary); margin-bottom: 16px; }
.about-features { display: flex; flex-direction: column; gap: 16px; margin-top: 24px; }
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.about-feature .icon {
  width: 32px; height: 32px;
  border-radius: 8px;
  background: rgba(168,85,247,0.1);
  color: var(--accent-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}
.about-feature h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
.about-feature p { font-size: 0.85rem; margin: 0; }

/* ===== Services / Solutions ===== */
.service-card .card-icon { background: rgba(168,85,247,0.1); color: var(--accent-purple); }
.solution-card .card-icon { background: rgba(59,130,246,0.1); color: var(--accent-blue); }

/* ===== Team ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}
.team-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}
.team-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.15); }
.team-avatar {
  width: 80px; height: 80px;
  border-radius: 50%;
  background: var(--accent-gradient);
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: #fff;
}
.team-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.team-card span { font-size: 0.85rem; color: var(--text-secondary); }
.team-card p { font-size: 0.85rem; color: var(--text-muted); margin-top: 12px; }

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
}
.contact-item .icon {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: rgba(0,240,255,0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.contact-item h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; }
.contact-item p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; }
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 40px;
}
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 0.95rem;
  transition: var(--transition);
  font-family: inherit;
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-cyan);
  box-shadow: 0 0 0 3px rgba(0,240,255,0.1);
}
.form-group textarea { min-height: 120px; resize: vertical; }

/* ===== Legal Pages ===== */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 140px 0 80px;
}
.legal-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.legal-content .last-updated {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 48px;
}
.legal-content h2 {
  font-size: 1.3rem;
  font-weight: 600;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-color);
}
.legal-content p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: 0.95rem;
}
.legal-content ul {
  list-style: disc;
  margin-left: 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
}
.legal-content ul li { margin-bottom: 8px; }

/* ===== Footer ===== */
.footer {
  border-top: 1px solid var(--border-color);
  padding: 60px 0 24px;
  background: var(--bg-secondary);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 2fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p { color: var(--text-secondary); font-size: 0.9rem; margin-top: 12px; }
.footer-brand .logo { margin-bottom: 8px; }
.footer-links h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-links a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 10px;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--text-primary); padding-left: 4px; }
.footer-contact p {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 10px;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { color: var(--text-muted); font-size: 0.85rem; }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: var(--text-muted); font-size: 0.85rem; transition: var(--transition); }
.footer-bottom-links a:hover { color: var(--text-primary); }

/* ===== Page Banner ===== */
.page-banner {
  padding: 160px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.page-banner-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 50%, rgba(168,85,247,0.1) 0%, transparent 60%);
}
.page-banner h1 {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  position: relative;
  margin-bottom: 12px;
}
.page-banner p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  position: relative;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Industries ===== */
.industry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.industry-tag {
  padding: 8px 16px;
  border-radius: 100px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: var(--transition);
}
.industry-tag:hover { border-color: var(--accent-purple); color: var(--text-primary); }

/* ===== Scroll Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav.mobile-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 70px; left: 16px; right: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    gap: 12px;
  }
}
@media (max-width: 576px) {
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .hero-stat h3 { font-size: 1.5rem; }
  .card-grid { grid-template-columns: 1fr; }
  .legal-content { padding: 120px 16px 60px; }
}