/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 1000;
  background-color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  height: 76px;
}

.container.navbar-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 20px;
  flex-wrap: nowrap;
}

.navbar-brand {
  display: flex;
  align-items: center;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bolder);
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.navbar-logo {
  width: 40px;
  height: 40px;
  margin-right: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-button);
  font-weight: var(--font-weight-bolder);
  font-size: var(--font-size-xl);
}

.navbar-menu {
  display: flex;
  flex-direction: row;
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
  justify-content: center;
  flex-wrap: nowrap;
  overflow: visible;
}

.navbar-item {
  position: relative;
  display: flex;
  align-items: center;
}

.navbar-link {
  display: block;
  padding: 12px 12px;
  font-weight: 600;
  color: #1D2129;
  text-decoration: none;
  transition: all 0.3s ease;
  white-space: nowrap;
  font-size: 16px;
}

.navbar-link:hover {
  color: #1677FF;
  text-decoration: none;
}

.navbar-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background-color: #1677FF;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.navbar-link:hover::after {
  transform: scaleX(1);
}

/* 下拉菜单 */
.navbar-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: var(--z-index-dropdown);
    min-width: 200px;
    padding: 8px 0;
    margin: 0;
    font-size: var(--font-size-base);
    text-align: left;
    list-style: none;
    background-color: var(--color-white);
    background-clip: padding-box;
    border-radius: var(--radius-container);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition-normal);
}

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

.navbar-dropdown-link {
    display: block;
    width: 100%;
    padding: 12px 20px;
    clear: both;
    font-weight: var(--font-weight-normal);
    color: var(--color-text);
    text-align: inherit;
    text-decoration: none;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
    transition: all var(--transition-fast);
}

.navbar-dropdown-link:hover {
    background-color: var(--color-background-alt);
    color: var(--color-primary);
    text-decoration: none;
    padding-left: 24px;
}

/* Mega Menu 样式 */
.navbar-mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(0);
    z-index: 1001;
    padding: 20px 0;
    font-size: 14px;
    text-align: left;
    list-style: none;
    background-color: #FFFFFF;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin: 0;
    box-sizing: border-box;
    border-top: 2px solid #1677FF;
    min-height: 200px;
    width: 1200px;
    max-width: 100%;
}

.navbar-item:hover .navbar-mega-menu {
    opacity: 1;
    visibility: visible;
}

.navbar-mega-menu-content {
    display: flex;
    justify-content: flex-start;
    gap: 0;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    box-sizing: border-box;
}

.navbar-mega-column {
    flex: 0 0 auto;
    width: 200px;
    padding: 0 24px;
    border-right: 1px solid #E5E7EB;
    transition: all 0.3s ease;
}

.navbar-mega-column:last-child {
    border-right: none;
}

.navbar-mega-column:hover {
    background-color: #F9FAFB;
}

.navbar-mega-title {
    font-size: 15px;
    font-weight: 600;
    color: #374151;
    margin-bottom: 16px;
    padding-bottom: 8px;
    display: block;
    border-bottom: 1px solid #E5E7EB;
    text-align: left;
}

.navbar-mega-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.navbar-mega-link {
    display: block;
    padding: 8px 0;
    font-weight: 400;
    color: #6B7280;
    text-decoration: none;
    transition: all 0.2s ease;
    text-align: left;
    font-size: 13px;
    position: relative;
    margin-left: 0;
}

.navbar-mega-link:hover {
    color: #1677FF;
    transform: translateX(2px);
    background-color: transparent;
    box-shadow: none;
}

/* 移除之前的图标装饰 */
.navbar-mega-link::after {
    display: none;
}

/* 为不同类别添加不同的图标颜色 - 保留但调整大小 */
.navbar-mega-link i {
    margin-right: 8px;
    font-size: 12px;
}

.navbar-mega-link:nth-child(1) i {
    color: #F59E0B;
}

.navbar-mega-link:nth-child(2) i {
    color: #3B82F6;
}

.navbar-mega-link:nth-child(3) i {
    color: #10B981;
}

.navbar-mega-link:nth-child(4) i {
    color: #8B5CF6;
}

.navbar-mega-link:nth-child(5) i {
    color: #EC4899;
}

.navbar-mega-link:nth-child(6) i {
    color: #EF4444;
}

.navbar-mega-link:nth-child(7) i {
    color: #6366F1;
}

/* 响应式设计 - Mega Menu */
@media (max-width: 1200px) {
    .navbar-mega-menu {
        padding: 16px 0;
    }
    
    .navbar-mega-menu-content {
        flex-wrap: wrap;
        gap: 0;
        justify-content: flex-start;
        padding: 0;
        max-width: 100%;
    }
    
    .navbar-mega-column {
        min-width: 200px;
        border-right: none;
        border-bottom: 1px solid #E5E7EB;
        padding: 16px 24px;
    }
    
    .navbar-mega-column:last-child {
        border-bottom: none;
    }
    
    .navbar-mega-title {
        font-size: 14px;
        margin-bottom: 12px;
        padding-bottom: 6px;
    }
    
    .navbar-mega-link {
        padding: 6px 0;
        font-size: 13px;
    }
}

/* 确保导航栏在所有屏幕尺寸下都能自适应 */
@media (min-width: 1200px) {
    .container.navbar-container {
        max-width: 100%;
        padding: 0 24px;
    }
    
    .navbar-mega-menu-content {
        max-width: 100%;
    }
}

/* 在桌面端隐藏移动端下拉菜单 */
@media (min-width: 768px) {
    .has-mega-menu .navbar-dropdown {
        display: none !important;
    }
}

@media (max-width: 767px) {
    /* 移动端隐藏Mega Menu，使用普通下拉菜单 */
    .navbar-mega-menu {
        display: none;
    }
    
    /* 为移动端创建简化的下拉菜单 */
    .has-mega-menu .navbar-dropdown {
        display: block !important;
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-normal);
    }
    
    .has-mega-menu:hover .navbar-dropdown {
        max-height: 500px;
    }
}

/* 导航操作按钮 */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* 在桌面端隐藏电话号码，优化导航栏空间 */
@media (min-width: 768px) {
  .navbar-phone {
    display: none;
  }
}

.navbar-phone {
  display: flex;
  align-items: center;
  color: #1D2129;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.navbar-phone:hover {
  color: #1677FF;
  text-decoration: none;
}

.navbar-phone i {
  margin-right: 6px;
  font-size: 18px;
}

/* 按钮样式优化 */
.navbar-actions .btn {
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

.navbar-actions .btn-secondary {
  background-color: #F0F2F5;
  color: #1D2129;
}

.navbar-actions .btn-secondary:hover {
  background-color: #E4E6EB;
}

.navbar-actions .btn-primary {
  background-color: #1677FF;
  color: #FFFFFF;
}

.navbar-actions .btn-primary:hover {
  background-color: #4096FF;
}

/* 汉堡菜单按钮 */
.navbar-toggle {
  display: none;
  padding: 8px;
  background-color: transparent;
  border: none;
  cursor: pointer;
  outline: none;
  flex-shrink: 0;
  margin-left: auto;
}

/* 确保导航栏在所有桌面端始终显示为一行 */
@media (min-width: 768px) {
  .navbar {
    height: 76px;
  }
  
  .container.navbar-container {
    height: 100%;
    flex-wrap: nowrap;
  }
  
  .navbar-menu {
    flex: 1;
    justify-content: center;
    margin: 0;
  }
  
  .navbar-actions {
    flex-shrink: 0;
  }
}

.navbar-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color 0.2s;
}

.navbar-toggle-icon::before,
.navbar-toggle-icon::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  position: absolute;
  left: 0;
  transition: transform 0.3s;
}

.navbar-toggle-icon::before {
  top: -8px;
}

.navbar-toggle-icon::after {
  bottom: -8px;
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-icon {
  background-color: transparent;
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-icon::before {
  transform: translateY(8px) rotate(45deg);
}

.navbar-toggle[aria-expanded="true"] .navbar-toggle-icon::after {
  transform: translateY(-8px) rotate(-45deg);
}

/* 页面内容 */
.page-content {
  padding-top: 76px;
  min-height: calc(100vh - 400px);
}

/* 响应式设计 */
@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
  }
}

@media (max-width: 1199px) and (min-width: 768px) {
  .container {
    max-width: 100%;
    padding-right: var(--spacing-large);
    padding-left: var(--spacing-large);
  }
  
  :root {
    --spacing-section: 60px;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.75rem;
    --font-size-2xl: 1.5rem;
    --font-size-xl: 1.25rem;
  }
  
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }
  h4 { font-size: var(--font-size-xl); }
  
  .navbar-link {
    padding: 12px 12px;
  }
}

@media (max-width: 767px) {
  .container {
    max-width: 100%;
    padding-right: var(--spacing-element);
    padding-left: var(--spacing-element);
  }
  
  :root {
    --spacing-section: 40px;
    --spacing-paragraph: 20px;
    --font-size-4xl: 1.875rem;
    --font-size-3xl: 1.625rem;
    --font-size-2xl: 1.375rem;
    --font-size-xl: 1.125rem;
  }
  
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }
  h4 { font-size: var(--font-size-xl); }
  
  /* 移动端导航 */
  .navbar-toggle {
    display: block;
  }
  
  .navbar-menu {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-white);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }
  
  .navbar-menu.show {
    max-height: 500px;
    padding: var(--spacing-element) 0;
  }
  
  .navbar-item {
    width: 100%;
  }
  
  .navbar-link {
    padding: 16px var(--spacing-element);
  }
  
  .navbar-dropdown {
    position: static;
    width: 100%;
    box-shadow: none;
    border: none;
    background-color: var(--color-background-alt);
    opacity: 1;
    visibility: visible;
    transform: none;
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
  }
  
  .navbar-item:hover .navbar-dropdown {
    max-height: 300px;
  }
  
  .navbar-dropdown-link {
    padding-left: calc(var(--spacing-element) * 2);
  }
  
  .navbar-actions {
    display: none;
  }
  
  .navbar-actions.mobile {
    display: flex;
    flex-direction: column;
    width: 100%;
    padding: var(--spacing-element);
    border-top: 1px solid var(--color-border);
  }
  
  .navbar-actions.mobile .btn {
    width: 100%;
    margin-bottom: var(--spacing-element);
  }
  
  .navbar-actions.mobile .navbar-phone {
    justify-content: center;
  }
  
  .page-content {
    padding-top: 76px;
  }
}