teach_sys_Demo/src/components/Sidebar/index.css

.sidebar-expand-wrapper {
  width: 280px;
  box-sizing: border-box;
  position: relative;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-direction: column;
  transition: width 0.3s ease;
  overflow-x: hidden;
  overflow-y: auto;
  background-color: #fff;

  .sidebar-title {
    width: 100%;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;

    > img {
      width: 48px;
      height: 48px;
      margin-right: 10px;
      transition: margin 0.3s ease;
    }
    > p {
      color: #262626;
      font-size: 20px;
      font-weight: 400;
      opacity: 1;
      transform: translateX(0);
      transition: opacity 0.3s ease, transform 0.3s ease;
      white-space: nowrap;
    }
  }
  .user-info {
    width: 100%;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    .user-avatar {
      width: 64px;
      height: 64px;
      border-radius: 12px;
    }
  }
  .visitor-count {
    width: 100%;
    height: 41px;
    text-align: center;

    .arco-statistic-value {
      font-size: 12px;
      font-weight: 700;
      line-height: 41px;
    }
  }
  .sidebar-menu {
    width: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    box-sizing: border-box;
    padding: 0 20px 60px;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    flex-direction: column;

    .sidebar-menu-item-wrapper {
      width: 100%;

      .sidebar-menu-title {
        width: 100%;
        height: 36px;
        text-align: left;
        line-height: 36px;
        color: #bfbfbf;
        font-size: 14px;
        font-weight: 400;
      }

      .sidebar-menu-item-active {
        background-color: #e8f3ff;

        .sidebar-menu-icon {
          color: #0275f2 !important;
        }
        .sidebar-menu-text {
          color: #0275f2 !important;
        }
      }

      .sidebar-menu-item {
        width: 100%;
        height: 40px;
        display: flex;
        justify-content: flex-start;
        align-items: center;
        border-radius: 8px;
        cursor: pointer;

        .sidebar-menu-icon {
          margin: 0 10px;
          font-size: 20px;
        }
        .sidebar-menu-text {
          margin-left: 10px;
          font-size: 16px;
          font-weight: 400;
          color: #616065;
        }
      }
    }
  }

  .sidebar-btn {
    width: 100%;
    height: 60px;
    line-height: 60px;
    position: absolute;
    bottom: 0px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    background-color: #fff;

    > img {
      width: 22px;
      height: 22px;
    }

    .sidebar-btn-text {
      margin-left: 10px;
      color: #616065;
      font-size: 16px;
      font-weight: 400;
      opacity: 1;
      transform: translateX(0);
      transition: opacity 0.3s ease, transform 0.3s ease;
      white-space: nowrap;
    }
  }
}

.sidebar-retract-wrapper {
  width: 95px;
  .sidebar-title {
    > img {
      margin: 0;
      transition: margin 0.3s ease;
    }
    > p {
      opacity: 0;
      transform: translateX(-10px);
      pointer-events: none;
      transition: opacity 0.3s ease, transform 0.3s ease;
      width: 0;
    }
  }
  .user-info {
    margin-bottom: 41px;
  }
  .visitor-count {
    display: none;
  }
  .sidebar-menu {
    .sidebar-menu-title {
      text-align: center;
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .sidebar-menu-item-wrapper {
      .sidebar-menu-item {
        justify-content: center;

        .sidebar-menu-icon {
          margin: 0;
        }
        .sidebar-menu-text {
          opacity: 0;
          transform: translateX(-10px);
          pointer-events: none;
          transition: opacity 0.3s ease, transform 0.3s ease;
          width: 0;
          display: none;
        }
      }
    }
  }

  .sidebar-btn {
    width: 80px;
    .sidebar-btn-text {
      opacity: 0;
      transform: translateX(-10px);
      pointer-events: none;
      transition: opacity 0.3s ease, transform 0.3s ease;
      width: 0;
    }
  }
}