/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  height: var(--navbar-height);
  display: flex;
  align-items: center;
  transition: background 0.35s ease, box-shadow 0.35s ease;
  background: transparent;
}

.navbar.scrolled {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  transition: var(--transition-fast);
}

.navbar.scrolled .nav-logo {
  color: var(--color-primary-dark);
}

.nav-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 900;
  font-size: var(--text-lg);
}

/* 菜单 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.88);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255,255,255,0.15);
}

.navbar.scrolled .nav-link {
  color: var(--color-neutral-700);
}

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-pale);
}

/* 右侧行动区 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-phone {
  font-size: var(--text-sm);
  font-weight: 600;
  color: rgba(255,255,255,0.9);
  display: flex;
  align-items: center;
  gap: 6px;
}

.navbar.scrolled .nav-phone {
  color: var(--color-neutral-700);
}

.nav-cta {
  padding: 10px 24px;
  background: var(--color-primary);
  color: var(--color-white) !important;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: var(--transition-base);
}

.nav-cta:hover {
  background: var(--color-primary-light) !important;
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

/* 移动端汉堡 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: var(--transition-base);
}

.navbar.scrolled .nav-toggle span {
  background: var(--color-neutral-800);
}

/* 移动端下拉菜单 */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--navbar-height);
  left: 0;
  right: 0;
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  padding: 16px 0;
  z-index: 9998;
}

.nav-mobile.open {
  display: block;
}

.nav-mobile .nav-link {
  display: block;
  color: var(--color-neutral-700);
  padding: 12px 24px;
  border-radius: 0;
}

.nav-mobile .nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-pale);
}

.nav-mobile .nav-phone {
  display: block;
  color: var(--color-neutral-700);
  padding: 12px 24px;
}

.nav-mobile .nav-cta {
  display: block;
  margin: 12px 24px 0;
  text-align: center;
  border-radius: var(--radius-sm);
}