:root {
  --primary-blue: #3b82f6;
  --primary-purple: #8b5cf6;
  --primary-pink: #ec4899;
  --slate-800: #1e293b;
  --slate-600: #475569;
  --slate-500: #64748b;
  --slate-300: #cbd5e1;
  --slate-200: #e2e8f0;
  --slate-50: #f8fafc;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--slate-800);
  padding-top: 76px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 50%, #faf5ff 100%);
}

.container {
  max-width: 1200px;
}

.page-header {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 50%, var(--primary-pink) 100%);
  padding: 3rem 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
}

.page-header h1 {
  position: relative;
  z-index: 1;
  font-size: 2.5rem;
  font-weight: 700;
  margin: 0;
}

.page-header .lead {
  position: relative;
  z-index: 1;
  opacity: 0.9;
}

.page-content {
  padding: 3rem 0;
  min-height: 60vh;
}

.page-content h2 {
  color: var(--slate-800);
  font-size: 1.75rem;
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.page-content h3 {
  color: var(--primary-blue);
  font-size: 1.35rem;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
  font-weight: 600;
}

.page-content p {
  color: var(--slate-600);
  margin-bottom: 1rem;
  line-height: 1.8;
}

.page-content ul, .page-content ol {
  color: var(--slate-600);
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
}

.page-content li {
  margin-bottom: 0.5rem;
}

.page-content a {
  color: var(--primary-blue);
  text-decoration: none;
  transition: color 0.3s ease;
}

.page-content a:hover {
  color: var(--primary-purple);
}

.navbar-glass {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
  padding: 0.75rem 0;
}

.navbar-brand-text {
  font-size: 1.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 50%, var(--primary-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-item a {
  color: var(--slate-600) !important;
  transition: all 0.3s ease;
  position: relative;
  font-size: 1rem;
  padding: 0.5rem 1rem !important;
  font-weight: 500;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-blue), var(--primary-purple));
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.nav-link:hover {
  color: var(--primary-blue) !important;
}

.nav-link:hover::after {
  width: 80%;
}

a.active {
  color: var(--primary-blue) !important;
}

.navbar-logo {
  height: 32px;
  width: auto;
  object-fit: contain;
}

.btn-gradient-primary {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-purple) 100%);
  border: none;
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 10px;
  transition: all 0.3s ease;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

.btn-gradient-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

footer {
  border-top: 1px solid var(--slate-200);
  background: #fff;
  padding: 1.5rem 0;
  margin-top: 3rem;
  text-align: center;
}

.footer-link {
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.95rem;
}

.footer-link:hover {
  color: var(--primary-blue) !important;
}

.contact-info {
  background: var(--slate-50);
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.contact-info h3 {
  margin-top: 0;
}

.card {
  border: 1px solid var(--slate-200);
  border-radius: 12px;
  transition: all 0.3s ease;
}

.card:hover {
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

@media (max-width: 768px) {
  .page-header h1 {
    font-size: 1.75rem;
  }

  .page-content h2 {
    font-size: 1.5rem;
  }

  .page-content h3 {
    font-size: 1.2rem;
  }

  .navbar-brand-text {
    font-size: 1.25rem;
  }

  .navbar-logo {
    height: 28px;
  }
}