.yu-menu {
  width: 200px;
  font-size: 0; }
  .yu-menu .sub-menu {
    transition: height 0.4s ease;
    line-height: 40px; }
    .yu-menu .sub-menu i {
      padding: 0 8px; }
    .yu-menu .sub-menu .menu-title {
      font-size: 14px;
      cursor: pointer;
      transition: color 0.4s ease;
      height: 40px; }
      .yu-menu .sub-menu .menu-title i.icon-angle-down {
        float: right;
        transition: all 0.4s ease; }
      .yu-menu .sub-menu .menu-title i.icon-angle-right {
        float: right; }
      .yu-menu .sub-menu .menu-title.active i.icon-angle-down {
        transform: rotate(-180deg); }
    .yu-menu .sub-menu .menu-item {
      font-size: 14px;
      cursor: pointer;
      transition: color 0.4s ease;
      height: 40px; }
  .yu-menu.dark {
    color: #ccc;
    background-color: #001528; }
    .yu-menu.dark .sub-menu .menu-title:hover {
      color: #fff; }
    .yu-menu.dark .sub-menu .menu-item:hover {
      color: #fff; }
    .yu-menu.dark .sub-menu .menu-item.active {
      background-color: #409EFF;
      color: #fff; }
  .yu-menu.light {
    border-right: 1px solid #E4E7ED; }
    .yu-menu.light .sub-menu {
      background-color: #fff; }
      .yu-menu.light .sub-menu .menu-title:hover {
        color: #409EFF; }
      .yu-menu.light .sub-menu .menu-item:hover {
        color: #409EFF; }
      .yu-menu.light .sub-menu .menu-item.active {
        background-color: #e8f3ff;
        color: #409EFF;
        border-right: 3px solid #409EFF; }
  .yu-menu.popup .transition {
    transform: scaleY(0);
    opacity: 0;
    transform-origin: center top;
    transition: transform .3s ease, opacity .3s ease; }
    .yu-menu.popup .transition.transition-enter {
      transform: scaleY(1);
      opacity: 1; }
    .yu-menu.popup .transition.transition-leave {
      transform: scaleY(0);
      opacity: 0; }
  .yu-menu.popup > .sub-menu {
    position: relative; }
    .yu-menu.popup > .sub-menu .menu-title + .sub-menu {
      box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
      margin-left: 8px;
      position: absolute;
      top: 0;
      left: 100%; }
  .yu-menu.popup > .sub-menu .sub-menu {
    min-width: 120px;
    position: absolute;
    z-index: 1000;
    border-radius: 4px; }
    .yu-menu.popup > .sub-menu .sub-menu + .menu-item {
      margin-top: 40px; }
    .yu-menu.popup > .sub-menu .sub-menu .menu-item {
      word-break: keep-all;
      width: auto;
      border-right: none;
      padding-right: 14px; }
  .yu-menu.horizontal {
    width: 100%;
    display: flex;
    border-right: none;
    border-bottom: 1px solid #E4E7ED; }
    .yu-menu.horizontal > .sub-menu > .menu-title {
      padding: 0 14px;
      transition: color 0.4s ease; }
      .yu-menu.horizontal > .sub-menu > .menu-title.active {
        border-bottom: 2px solid #409EFF;
        color: #409EFF; }
    .yu-menu.horizontal.popup > .sub-menu > .menu-title + .sub-menu {
      margin-left: 0;
      margin-top: 8px; }
    .yu-menu.horizontal.popup > .sub-menu > .sub-menu {
      margin-left: 0;
      position: absolute;
      top: 100%;
      left: 0; }