BlackFruit-UI/css/nav-mega-menu.css

/* 三级导航菜单样式 - 阿里云风格两栏布局 */

/* 导航容器 */
.nav-cont {
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  background: linear-gradient(to bottom, #f8fbff 0%, #fff 100%);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  overflow: hidden;
  transition: height 0.3s ease-out;
}

/* Mega Menu 两栏布局 */
.nav-cont-menu.mega-menu {
  display: none;
  min-height: 400px;
}

.nav-content {
  display: flex;
  max-width: 1400px;
  margin: 0 auto;
  min-height: 400px;
}

/* 左侧二级菜单栏 */
.nav-left-sidebar {
  width: 200px;
  background: #f7f8fa;
  border-right: 1px solid #e8e8e8;
  flex-shrink: 0;
}

/* 二级菜单项 */
.nav-category-item {
  position: relative;
  display: block;
  padding: 16px 20px;
  color: #333;
  font-size: 14px;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: all 0.2s ease;
  cursor: pointer;
}

.nav-category-item:hover,
.nav-category-item.active {
  background: #fff;
  border-left-color: #1890ff;
  color: #1890ff;
}

.nav-category-item .category-icon {
  display: inline-block;
  width: 20px;
  height: 20px;
  margin-right: 8px;
  vertical-align: middle;
}

.nav-category-item .category-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.nav-category-name {
  font-weight: 500;
}

.nav-category-desc {
  font-size: 12px;
  color: #999;
  margin-top: 2px;
  display: block;
}

/* 右侧三级菜单区域 */
.nav-right-content {
  flex: 1;
  padding: 24px 32px;
  background: linear-gradient(135deg, #fafcff 0%, #ffffff 100%);
  overflow-y: auto;
  max-height: 500px;
}

/* 三级菜单容器 */
.nav-third-panel {
  display: none;
}

.nav-third-panel.active {
  display: block;
  animation: fadeInRight 0.3s ease;
}

/* 三级菜单标题 */
.nav-third-title {
  font-size: 16px;
  font-weight: 600;
  color: #333;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid #1890ff;
  display: inline-block;
}

/* 三级菜单网格布局 */
.nav-third-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px 24px;
  margin-top: 20px;
}

/* 三级菜单项 */
.nav-third-item {
  margin: 0;
  padding: 0;
  min-width: 0;
}

.nav-third-link {
  display: block;
  width: 100%;
  padding: 10px 12px 10px 24px;
  border-radius: 4px;
  color: #333;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  box-sizing: border-box;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  position: relative;
}

.nav-third-link::before {
  content: '›';
  position: absolute;
  left: 8px;
  top: 50%;
  transform: translateY(-50%);
  color: #1890ff;
  font-size: 16px;
  font-weight: bold;
}

.nav-third-link:hover {
  background: #e6f7ff;
  border-color: #91d5ff;
  color: #1890ff;
  padding-left: 28px;
}

.nav-third-link:hover::before {
  left: 12px;
}

/* 空状态 */
.nav-right-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 300px;
  color: #999;
  font-size: 14px;
}

/* 旧版二级菜单样式（无三级菜单时使用） */
.nav-item-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  transition: all 0.2s ease;
  text-decoration: none;
  color: #333;
  border-left: 3px solid transparent;
}

.nav-item-box:hover {
  background: #fff;
  border-left-color: #1890ff;
  color: #1890ff;
}

.nav-item-box img {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.item-box-title .title {
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 2px;
}

.item-box-title .desc {
  font-size: 12px;
  color: #999;
}

/* 空菜单占位 */
.nav-cont-menu.nav-cont-empty {
  display: none;
}

/* 动画效果 */
@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(10px);
  }

  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 响应式调整 */
@media (max-width: 768px) {
  .nav-cont {
    display: none !important;
  }

  .nav-content {
    flex-direction: column;
    min-height: auto;
  }

  .nav-left-sidebar {
    width: 100%;
    border-right: none;
    border-bottom: 1px solid #e8e8e8;
  }

  .nav-right-content {
    padding: 16px;
    max-height: none;
  }

  .nav-third-grid {
    grid-template-columns: 1fr;
  }
}