/* 优化导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(248, 250, 252, 0.95);
  backdrop-filter: var(--blur-md);
  border-bottom: 1px solid var(--border-primary);
  padding: 1rem 0;
}

.nav-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  flex-shrink: 0;
}

.nav-logo {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  justify-content: center;
  flex: 1;
}

.nav-item, .mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.8rem;
  background: transparent;
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  flex-shrink: 0;
  position: relative;
}

.nav-item:hover, .mobile-nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.nav-item i, .mobile-nav-item i {
  font-size: 0.75rem;
}

/* 购买卡密下拉菜单样式 */
.buy-dropdown {
  position: relative;
}

.buy-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  margin-top: 0.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--blur-md);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 1001;
  min-width: 160px;
}

.buy-dropdown.active .buy-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.buy-option {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  text-decoration: none;
}

.buy-option:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.buy-option i {
  margin-right: 0.5rem;
  width: 12px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-shrink: 0;
}

/* 语言选择下拉框 */
.lang-dropdown {
  position: relative;
}

.lang-select {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  min-width: 80px;
  justify-content: space-between;
}

.lang-select:hover {
  color: var(--text-primary);
  background: var(--bg-tertiary);
  border-color: var(--primary);
}

.lang-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 0.5rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 12px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: var(--blur-md);
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.2s ease;
  z-index: 1001;
  min-width: 120px;
}

.lang-dropdown.active .lang-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.lang-option {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
}

.lang-option:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.lang-option.active {
  background: var(--gradient-primary);
  color: white;
}

/* 移动端汉堡菜单 */
.mobile-menu-toggle {
  display: none;
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: 8px;
  padding: 0.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.mobile-menu-toggle:hover {
  color: var(--text-primary);
  border-color: var(--primary);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(248, 250, 252, 0.95);
  backdrop-filter: var(--blur-md);
  border-top: 1px solid var(--border-secondary);
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

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

.mobile-menu-content {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 1400px;
  margin: 0 auto;
}

.mobile-menu-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--bg-surface);
  border: 1px solid var(--border-secondary);
  border-radius: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.mobile-nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
  border-color: var(--primary);
}

/* 移动端购买卡密下拉菜单 */
.mobile-buy-dropdown {
  position: relative;
}

.mobile-buy-dropdown-menu {
  margin-top: 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-secondary);
  border-radius: 12px;
  overflow: hidden;
  opacity: 0;
  max-height: 0;
  transition: all 0.3s ease;
}

.mobile-buy-dropdown.active .mobile-buy-dropdown-menu {
  opacity: 1;
  max-height: 200px;
}

.mobile-buy-option {
  display: block;
  width: 100%;
  padding: 0.75rem 1rem;
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  text-align: left;
  text-decoration: none;
}

.mobile-buy-option:hover {
  background: var(--bg-surface);
  color: var(--text-primary);
}

.mobile-buy-option i {
  margin-right: 0.5rem;
  width: 12px;
}