/* ========================================
   顶部导航 - 简约留白设计
   ======================================== */

@import url('variables.css');

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 78px;
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(45, 95, 63, 0.08);
  z-index: var(--z-index-fixed);
  transition: box-shadow var(--transition-base), background-color var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-elevation-2);
  background-color: rgba(255, 255, 255, 0.98);
}

.navbar-content {
  max-width: var(--container-width-xl);
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-6);
  padding: 0 var(--spacing-4);
}

.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
  text-decoration: none;
  color: var(--color-primary);
}

.navbar-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.navbar-logo-main {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
}

.navbar-logo-sub {
  font-size: var(--font-size-xs);
  letter-spacing: 0.2em;
  color: var(--color-secondary-light);
}

.navbar-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: var(--spacing-2);
}

.navbar-item {
  position: relative;
}

.navbar-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-full);
  color: var(--color-secondary-dark);
  font-weight: var(--font-weight-medium);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.navbar-link:hover,
.navbar-link.active {
  color: var(--color-primary);
  background-color: rgba(45, 95, 63, 0.08);
}

.navbar-link.has-dropdown::after {
  content: '▾';
  font-size: 0.65em;
  color: currentColor;
}

.navbar-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 220px;
  list-style: none;
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-elevation-2);
  border: 1px solid rgba(45, 95, 63, 0.08);
  padding: var(--spacing-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: var(--transition-fast);
  z-index: var(--z-index-dropdown);
}

.navbar-item.open .navbar-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.navbar-dropdown-item { margin: 0; }

.navbar-dropdown-link {
  display: block;
  padding: var(--spacing-3) var(--spacing-4);
  border-radius: var(--radius-md);
  color: var(--color-secondary-dark);
  font-size: var(--font-size-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.navbar-dropdown-link:hover,
.navbar-dropdown-link.active {
  color: var(--color-primary);
  background-color: var(--color-forest-mist);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
}

.navbar-phone-label {
  font-size: var(--font-size-xs);
  color: var(--color-secondary-light);
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.navbar-phone-number {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.navbar-toggle {
  display: none;
  border: 1px solid rgba(45, 95, 63, 0.25);
  background-color: transparent;
  color: var(--color-primary);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
}

.navbar-toggle span {
  font-size: 1.2rem;
  line-height: 1;
}

/* ========== 移动端 ========== */
@media (max-width: 1024px) {
  .navbar-menu {
    position: absolute;
    top: 78px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: rgba(255, 255, 255, 0.97);
    border-bottom-left-radius: var(--radius-xl);
    border-bottom-right-radius: var(--radius-xl);
    padding: var(--spacing-4);
    box-shadow: var(--shadow-elevation-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition-fast);
  }

  .navbar-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .navbar-item {
    width: 100%;
  }

  .navbar-link {
    width: 100%;
    justify-content: space-between;
  }

  .navbar-dropdown {
    position: relative;
    top: 0;
    box-shadow: none;
    border: none;
    padding: 0 var(--spacing-2) var(--spacing-2);
  }

  .navbar-actions {
    display: none;
  }

  .navbar-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}