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

:root {
  --primary: #4f46e5;
  --primary-light: #818cf8;
  --primary-dark: #3730a3;
  --accent: #06b6d4;
  --bg: #0f172a;
  --bg-light: #1e293b;
  --text: #e2e8f0;
  --text-muted: #94a3b8;
  --card-bg: rgba(30, 41, 59, 0.7);
  --border: rgba(99, 102, 241, 0.15);
  --gradient: linear-gradient(135deg, var(--primary), var(--accent));
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(79, 70, 229, 0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 20%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(99, 102, 241, 0.08) 1px, transparent 1px);
  background-size: 32px 32px;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  font-size: 14px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
}

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

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin-bottom: 40px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(79, 70, 229, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  border: 1px solid var(--border);
  color: var(--text);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--primary-light);
  background: rgba(79, 70, 229, 0.1);
}

/* Section */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
}

.section-line {
  width: 60px;
  height: 3px;
  background: var(--gradient);
  border-radius: 2px;
  margin: 16px auto 0;
}

.section-sub {
  color: var(--text-muted);
  margin-top: 16px;
  font-size: 1rem;
}

/* About */
.about {
  padding: 100px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
}

.about-text p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.about-text strong {
  color: var(--text);
}

.about-stats {
  display: grid;
  gap: 24px;
}

.stat-item {
  text-align: center;
  padding: 32px 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(10px);
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  display: block;
  color: var(--text-muted);
  font-size: 14px;
  margin-top: 4px;
}

/* Services */
.services {
  padding: 100px 0;
  background: var(--bg-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  padding: 36px 28px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.service-card:hover {
  border-color: var(--primary-light);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(79, 70, 229, 0.15);
}

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  border-radius: 10px;
  margin-bottom: 20px;
}

.service-icon svg {
  width: 24px;
  height: 24px;
  stroke: #fff;
}

.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  font-weight: 600;
}

.service-card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

/* Footer */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

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

.footer p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 8px;
}

.footer a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.3s;
}

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

/* Responsive */
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

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

  .hero {
    min-height: 90vh;
  }

  .stat-item {
    padding: 24px 12px;
  }

  .stat-number {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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