position: absolute;
left: 0;
top: 40px;
- z-index: 1;
overflow-x: hidden;
overflow-y: auto;
&.item-click:hover ul.sub-menu,
&.item-click:active ul.sub-menu {
visibility: visible;
+ z-index: 100;
max-height: 500px;
border: 1px solid @func_color_b;
border-radius: 2px;