naive-ui/styles/Menu.scss

@import './mixins/mixins.scss';
@import './themes/vars.scss';

$layout-nav-height: 64px;

@include themes-mixin() {
  @include b(menu) {
    background-color: $menu-background-color;
    width: 100%;
    transition:width .3s;
    @include b(menu-container) {
      transition: transform .3s $default-cubic-bezier, opacity .3s $default-cubic-bezier, background-color .3s $default-cubic-bezier, border-color .3s $default-cubic-bezier;
      @include b(menu-divider) {
        margin: 0px 25px;
        border-bottom: 1px solid rgba(255, 255, 255, .08);
      }
      @include b(menu-content) {
        overflow: hidden;
        transition: opacity .3s $default-cubic-bezier;

        @include b(menu-list) {
          list-style: none;
          padding: 0;
          @include b(menu-item) {
            cursor: pointer;
            padding-left: 24px;
            position: relative;
            padding-top: 16px;
            padding-bottom: 16px;
            // padding-left: 48px;
            font-size: 14px;
            list-style: none;
            @include e(icon) {
              &::before {
                content: '';
                width: 10px;
                height: 10px;
                position: absolute;
                background-image:linear-gradient(47deg,rgba(120, 205, 104, 1) 0%,rgba(20, 166, 165, 1) 100%);
                top: 20px;
                left: 30px;
                -webkit-clip-path: polygon(100% 0, 100% 100%, 0% 100%);
                clip-path: polygon(100% 0, 100% 100%, 0% 100%);
              }
            }
            @include m(selected) {
              background-image: $menu-item-selected-background-image;
            }
            @include m(disabled) {
              opacity: 0.45;
              cursor: not-allowed;
            }
          }
        }
        @include m(horizontal) {
          @include b(menu-header) {
            display: none;
          }
          @include b(menu-list) {
            > * {
              float: left;
            }
          }
        }
        
      }
    }
    @include b(menu-title-icon) {
      width: 10px;
      height: 10px;
      margin-right: 10px;
      &::before {
        content: '';
        width: 10px;
        height: 10px;
        background-image: linear-gradient(47deg, #78cd68 0%, #14a6a5 100%);
        display: inline-block;
        -webkit-clip-path: polygon(100% 0, 100% 100%, 0% 100%);
        clip-path: polygon(100% 0, 100% 100%, 0% 100%);
      }
    }
    @include b(sub-menu) {
      cursor: pointer;
      font-size: 14px;
      position: relative;
      @include b(sub-menu-header) {
        position: relative;
        padding: 16px 0;
        &::after { // down arrow
          content: '';
          height: 6px;
          width: 6px;
          border-left: 2px solid $--n-primary-color;
          border-top: 2px solid $--n-primary-color;
          position: absolute;
          right: 20px;
          top: calc(50% - 3px);
          transform: rotate(45deg) ;
          transform-origin: 25% 25%;
          transition: transform 0.3s $default-cubic-bezier, opacity 0.3s $default-cubic-bezier;
        }
        @include m(collapsed) {
          &::after {
            transform: rotate(225deg) ;
          }
        }
        @include m(disabled) {
          opacity: 0.45;
          cursor: not-allowed;
        }
      }
      @include b(sub-menu-content) {
        padding: 0;
        @include fade-in-height-expand-transition();
      }
      
    }
    @include b(menu-item-group) {
      @include b(menu-item-group-title) {
        display: block;
        padding-top: 16px;
        padding-bottom: 16px;
        color: #999;
      }
    }
  }
}