/* Nav Styles */

.nav {
  background-color: white;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 40;
  /* 优化 sticky 滚动性能 */
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.nav-container {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .nav-container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .nav-container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 4rem;
}

/* Logo Styles - matching Footer design */
.nav-logo-wrapper {
  flex-shrink: 0;
}

.nav-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo-container {
  background-color: #2563eb;
  border-radius: 9999px;
  padding: 0.5rem;
  margin-right: 0.75rem;
}

.nav-logo-icon {
  width: 1.5rem;
  height: 1.5rem;
  color: white;
}

.nav-logo-text {
  font-size: 2rem;
  font-weight: 700;
  color: #2563eb;
}

.nav-logo-image {
  height: 2.5rem;
  width: auto;
}

/* Desktop Navigation */
.nav-desktop-menu {
  display: none;
}

@media (min-width: 768px) {
  .nav-desktop-menu {
    display: block;
  }
}

.nav-menu-items {
  display: flex;
  align-items: baseline;
  gap: 2rem;
  margin-left: 2.5rem;
}

.nav-menu-link {
  color: #374151;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 200ms;
  display: flex;
  align-items: center;
}

.nav-menu-link:hover {
  color: #2563eb;
}

.nav-menu-link-with-icon {
  gap: 0.25rem;
}

.nav-menu-icon {
  width: 1rem;
  height: 1rem;
}

/* Mobile menu button */
.nav-mobile-button {
  display: block;
}

@media (min-width: 768px) {
  .nav-mobile-button {
    display: none;
  }
}

.nav-mobile-toggle {
  color: #374151;
  padding: 0.5rem;
  background: none;
  border: none;
  cursor: pointer;
  transition: color 200ms;
}

.nav-mobile-toggle:hover {
  color: #2563eb;
}

.nav-mobile-icon {
  height: 1.5rem;
  width: 1.5rem;
}

/* Mobile Navigation */
.nav-mobile-menu {
  display: block;
}

@media (min-width: 768px) {
  .nav-mobile-menu {
    display: none;
  }
}

.nav-mobile-menu-content {
  padding: 0.5rem 0.75rem 0.75rem;
  background-color: white;
  border-top: 1px solid #e5e7eb;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

@media (min-width: 640px) {
  .nav-mobile-menu-content {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
}

.nav-mobile-link {
  color: #374151;
  display: block;
  padding: 0.5rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 200ms;
}

.nav-mobile-link:hover {
  color: #2563eb;
}

.nav-mobile-link-icon {
  width: 1rem;
  height: 1rem;
  display: inline-block;
  margin-right: 0.5rem;
  vertical-align: middle;
}