三级导航菜单系统实现

2026-01-10 16:45:20 +08:00
parent e72fbaf98a
commit b90b24a0d7
6 changed files with 617 additions and 145 deletions
--- a/css/nav-mega-menu.css
+++ b/css/nav-mega-menu.css
@@ -0,0 +1,222 @@
+/* 三级导航菜单样式 - Mega Menu风格 */
+
+/* 导航容器 */
+.nav-cont {
+  position: absolute;
+  top: 100%;
+  left: 0;
+  width: 100%;
+  background: #fff;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
+  z-index: 1000;
+  overflow: hidden;
+  transition: height 0.3s ease-out;
+}
+
+/* Mega Menu 内容区 */
+.nav-cont-menu.mega-menu {
+  display: none;
+  padding: 24px 0;
+}
+
+.nav-cont-menu.mega-menu .nav-content {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 32px;
+  max-width: 1400px;
+  margin: 0 auto;
+  padding: 0 20px;
+}
+
+/* 二级菜单项（带三级菜单的分类） */
+.nav-category {
+  flex: 0 0 auto;
+  min-width: 200px;
+  max-width: 280px;
+}
+
+.nav-category-header {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 8px 12px;
+  margin-bottom: 12px;
+  border-radius: 6px;
+  background: linear-gradient(135deg, #f0f7ff 0%, #e6f3ff 100%);
+  transition: all 0.2s ease;
+}
+
+.nav-category-header:hover {
+  background: linear-gradient(135deg, #e6f3ff 0%, #d9edff 100%);
+  transform: translateX(2px);
+}
+
+.nav-category-icon {
+  flex-shrink: 0;
+  width: 32px;
+  height: 32px;
+  border-radius: 6px;
+  overflow: hidden;
+}
+
+.nav-category-icon img {
+  width: 100%;
+  height: 100%;
+  object-fit: contain;
+}
+
+.nav-category-info {
+  flex: 1;
+  min-width: 0;
+}
+
+.nav-category-title {
+  font-size: 14px;
+  font-weight: 600;
+  color: #1890ff;
+  margin-bottom: 2px;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.nav-category-desc {
+  font-size: 12px;
+  color: #8c8c8c;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+/* 三级菜单列表 */
+.nav-third-level {
+  padding-left: 12px;
+}
+
+.nav-third-item {
+  margin-bottom: 8px;
+}
+
+.nav-third-link {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 6px 12px;
+  border-radius: 4px;
+  color: #333;
+  font-size: 13px;
+  text-decoration: none;
+  transition: all 0.2s ease;
+  position: relative;
+}
+
+.nav-third-link::before {
+  content: '';
+  position: absolute;
+  left: 0;
+  top: 50%;
+  transform: translateY(-50%);
+  width: 3px;
+  height: 0;
+  background: #1890ff;
+  border-radius: 2px;
+  transition: height 0.2s ease;
+}
+
+.nav-third-link:hover {
+  background: #f5f5f5;
+  color: #1890ff;
+  padding-left: 16px;
+}
+
+.nav-third-link:hover::before {
+  height: 16px;
+}
+
+.nav-third-name {
+  flex: 1;
+  font-weight: 500;
+}
+
+.nav-third-desc {
+  font-size: 11px;
+  color: #999;
+  margin-left: auto;
+}
+
+/* 没有三级菜单的二级菜单项（旧版兼容） */
+.nav-item-box {
+  display: flex;
+  align-items: flex-start;
+  gap: 12px;
+  padding: 12px 16px;
+  border-radius: 6px;
+  transition: all 0.2s ease;
+  text-decoration: none;
+  color: #333;
+}
+
+.nav-item-box:hover {
+  background: #f5f5f5;
+  transform: translateY(-2px);
+}
+
+.nav-item-box img {
+  width: 40px;
+  height: 40px;
+  flex-shrink: 0;
+  border-radius: 4px;
+}
+
+.item-box-title .title {
+  font-size: 14px;
+  font-weight: 600;
+  color: #333;
+  margin-bottom: 4px;
+}
+
+.item-box-title .desc {
+  font-size: 12px;
+  color: #8c8c8c;
+}
+
+/* 空菜单占位 */
+.nav-cont-menu.nav-cont-empty {
+  display: none;
+}
+
+/* 响应式调整 */
+@media (max-width: 768px) {
+  .nav-cont {
+    display: none !important;
+  }
+  
+  .nav-cont-menu.mega-menu {
+    padding: 16px 0;
+  }
+  
+  .nav-cont-menu.mega-menu .nav-content {
+    flex-direction: column;
+    gap: 16px;
+  }
+  
+  .nav-category {
+    max-width: 100%;
+  }
+}
+
+/* 加载动画 */
+@keyframes fadeInDown {
+  from {
+    opacity: 0;
+    transform: translateY(-10px);
+  }
+  to {
+    opacity: 1;
+    transform: translateY(0);
+  }
+}
+
+.nav-cont-menu.animated {
+  animation: fadeInDown 0.3s ease-out;
+}