#app {
  // 文本颜色调整为偏黑色系（直接写死值，确保清晰）
  --text-primary: #1a1a1a;
  --text-regular: #333333;
  --text-secondary: #555555;
  --text-placeholder: #777777;
  --background-color: #fff;

  .main-container {
    height: 100%;
    transition: margin-left .28s, box-shadow .3s ease;
    margin-left: $base-sidebar-width;
    position: relative;
    // background: #1E2227; // 金属浅色渐变
  }

  .sidebarHide {
    margin-left: 0 !important;
  }

  .sidebar-container {
    -webkit-transition: width .28s, background .3s ease;
    transition: width 0.28s, background .3s ease;
    width: $base-sidebar-width !important;
    background: var(--background-color); // 金属深色渐变
    border-right: 1px solid #8d939b;
    height: 100%;
    position: fixed;
    font-size: 0px;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 1001;
    overflow: hidden;
    box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.15);

    // reset element-ui css
    .horizontal-collapse-transition {
      transition: 0s width ease-in-out, 0s padding-left ease-in-out, 0s padding-right ease-in-out;
    }

    .scrollbar-wrapper {
      overflow-x: hidden !important;
    }

    .el-scrollbar__bar.is-vertical {
      right: 0px;
      background: #2Bf;
      width: 0;
    }

    .el-scrollbar__thumb {
      background: var(--background-color);
      border-radius: 3px;
    }

    .el-scrollbar {
      height: 100%;
    }

    &.has-logo {
      .el-scrollbar {
        height: calc(100% - 50px);
      }
    }

    .is-horizontal {
      display: none;
    }

    a {
      display: inline-block;
      width: 100%;
      overflow: hidden;
      color: var(--text-regular); // 链接文本偏黑
      text-decoration: none;
    }

    .svg-icon {
      margin-right: 16px;
      color: var(--text-secondary); // 图标颜色稍浅
    }

    .el-menu {
      border: none;
      height: 100%;
      width: 100% !important;
      background: transparent;
    }

    .el-menu-item,
    .el-submenu__title {
      // 明确默认状态样式（关键修复）
      background: transparent !important;
      box-shadow: none !important;

      overflow: hidden !important;
      text-overflow: ellipsis !important;
      white-space: nowrap !important;
      color: var(--text-regular); // 菜单项文本偏黑
      border-radius: 4px;
      margin: 0;
      transition: all 0.2s ease;
    }

    // menu hover - 仅在hover时生效
    .submenu-title-noDropdown,
    .el-submenu__title {
      &:hover {
        background: rgba(255, 255, 255, 0.1) !important;
        color: var(--text-primary) !important; // hover时文本更深
        box-shadow: inset 1px 1px 2px rgba(0, 0, 0, 0.1),
          inset -1px -1px 2px rgba(255, 255, 255, 0.05);
      }
    }

    // & .nest-menu .el-submenu>.el-submenu__title,
    & .el-submenu .el-menu-item {
      // 子菜单默认样式
      background: transparent !important;
      box-shadow: none !important;

      min-width: $base-sidebar-width !important;
      margin: 0 4px;

      &:hover {
        background: rgba(255, 255, 255, 0.1) !important;
        color: var(--text-primary) !important;
      }
    }

    // & .theme-dark .nest-menu .el-submenu>.el-submenu__title,
    & .theme-dark .el-submenu .el-menu-item {
      background: transparent !important;
      color: var(--text-regular);

      &:hover {
        background: rgba(255, 255, 255, 0.1) !important;
        color: var(--text-primary) !important;
      }

      &.is-active {
        background: rgba(95, 123, 160, 0.28) !important; // 激活背景
        color: #000 !important; // 激活文字白色
        font-weight: 600;
        border-left: 3px solid #5F7BA0; // 左边高亮条
      }
    }
  }

  .el-menu-item.is-active.submenu-title-noDropdown {
    background: #657b96; // 激活背景
    color: #fff; // 激活文字白色
    font-weight: 600;
    border-left: 3px solid #657b96; // 左边高亮条
  }

  .hideSidebar {
    .sidebar-container {
      width: 54px !important;
    }

    .main-container {
      margin-left: 54px;
    }

    .submenu-title-noDropdown {
      padding: 0 !important;
      position: relative;

      .el-tooltip {
        padding: 0 !important;

        .svg-icon {
          margin-left: 20px;
        }
      }
    }

    .el-submenu {
      overflow: hidden;

      &>.el-submenu__title {
        padding: 0 !important;

        .svg-icon {
          margin-left: 20px;
        }
      }
    }

    .el-menu--collapse {
      .el-submenu {
        &>.el-submenu__title {
          &>span {
            height: 0;
            width: 0;
            overflow: hidden;
            visibility: hidden;
            display: inline-block;
          }
        }
      }
    }
  }

  .el-menu--collapse .el-menu .el-submenu {
    min-width: $base-sidebar-width !important;
  }

  .el-submenu .el-menu {
    padding-left: 10px;
  }

  // mobile responsive
  .mobile {
    .main-container {
      margin-left: 0px;
    }

    .sidebar-container {
      transition: transform .28s, box-shadow .3s ease;
      width: $base-sidebar-width !important;
      box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.15);
    }

    &.hideSidebar {
      .sidebar-container {
        pointer-events: none;
        transition-duration: 0.3s;
        transform: translate3d(-$base-sidebar-width, 0, 0);
      }
    }
  }

  .withoutAnimation {

    .main-container,
    .sidebar-container {
      transition: none;
    }
  }
}

// 收起状态下的菜单
.el-menu--vertical {
  &>.el-menu {
    .svg-icon {
      margin-right: 16px;
      color: var(--text-secondary);
    }
  }

  .el-menu-item .nest-menu {
    // 默认样式重置
    background: transparent !important;
    box-shadow: none !important;

    &:hover {
      background: rgba(255, 255, 255, 0.1) !important;
      color: var(--text-primary) !important;
      box-shadow: inset 1px 1px 2px rgba(0, 0, 0, 0.1),
        inset -1px -1px 2px rgba(255, 255, 255, 0.05);
    }

    ::v-deep &.is-active {
      background: rgba(95, 123, 160, 0.28) !important; // 工业蓝背景
      color: #ffffff !important; // 激活文字白色
      font-weight: 600;
      border-left: 3px solid #5F7BA0;
      box-shadow: inset 1px 1px 2px rgba(0, 0, 0, 0.15),
        inset -1px -1px 2px rgba(255, 255, 255, 0.08);
    }

    ::v-deep .el-menu-item.is-active span,
    ::v-deep .el-submenu__title.is-active span {
      color: #ffffff !important; // 激活文字白色
    }
  }

  // the scroll bar appears when the subMenu is too long
  >.el-menu--popup {
    max-height: 100vh;
    overflow-y: auto;
    background: linear-gradient(145deg, #b0b5bb, #999ea6);
    border: 1px solid #8d939b;
    box-shadow: 2px 2px 6px rgba(0, 0, 0, 0.15);

    &::-webkit-scrollbar-track-piece {
      background: rgba(0, 0, 0, 0.05);
    }

    &::-webkit-scrollbar {
      width: 6px;
    }

    &::-webkit-scrollbar-thumb {
      background: #8d939b;
      border-radius: 3px;
    }
  }
}

#app .sidebar-container .nest-menu .el-submenu .el-submenu__title {
  margin: 0 4px;
}