/* Header 样式 */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: var(--background);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: box-shadow 0.3s ease;
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.header-logo-icon {
  width: 180px;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.header-nav {
  display: flex;
  gap: 40px;
}

.header-nav a {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 0;
  position: relative;
  transition: color 0.2s ease;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.header-nav a:hover,
.header-nav a.active {
  color: var(--primary);
}

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

.header-cta {
  padding: 10px 24px;
  background: var(--primary);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  transition: all 0.2s ease;
}

.header-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Footer 样式 */
.footer {
  background: var(--text-primary);
  color: white;
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 60px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  font-size: 24px;
  margin-bottom: 16px;
}

.footer-brand p {
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 400px;
}

.footer-section h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
  color: white;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 30px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}