/* 导航栏样式 */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  background-color: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
  padding: var(--space-4) 0;
}

.navbar.scrolled {
  background-color: rgba(10, 31, 63, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
}

.navbar-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-2xl);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

@media (min-width: 640px) {
  .navbar-container {
    padding: 0 var(--space-8);
  }
}

/* Logo样式 */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
}

.logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-dark) 100%);
  border-radius: var(--radius-md);
}

.logo-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-neutral-900);
}

.logo-text {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-text-inverse);
  letter-spacing: 0.5px;
}

/* 导航链接 */
.navbar-nav {
  display: none;
}

@media (min-width: 1024px) {
  .navbar-nav {
    display: flex;
    align-items: center;
    gap: var(--space-8);
  }
}

.nav-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-inverse);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width var(--transition-base);
}

.nav-link:hover::after {
  width: 100%;
}

/* 导航右侧操作区 */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.nav-btn-login {
  display: none;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  padding: var(--space-2) var(--space-4);
  transition: color var(--transition-fast);
}

.nav-btn-login:hover {
  color: var(--color-text-inverse);
}

@media (min-width: 768px) {
  .nav-btn-login {
    display: inline-block;
  }
}

.nav-btn-cta {
  display: none;
}

@media (min-width: 768px) {
  .nav-btn-cta {
    display: inline-flex;
  }
}

/* 移动端菜单按钮 */
.navbar-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

@media (min-width: 1024px) {
  .navbar-toggle {
    display: none;
  }
}

.navbar-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-inverse);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.navbar-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.navbar-toggle.active span:nth-child(2) {
  opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* 移动端菜单 */
.navbar-mobile {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  height: calc(100vh - 72px);
  min-height: calc(100vh - 72px);
  background-color: rgba(10, 31, 63, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--transition-slow);
  z-index: var(--z-fixed);
  overflow-y: auto;
}

.navbar-mobile.active {
  transform: translateX(0);
}

.navbar-mobile .nav-link {
  display: block;
  font-size: var(--text-lg);
  padding: var(--space-4) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar-mobile .nav-link::after {
  display: none;
}

.navbar-mobile-actions {
  margin-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.navbar-mobile-actions .btn {
  width: 100%;
  justify-content: center;
}