element-plus/docs/.vitepress/vitepress/styles/common/hamburger.scss

@use '../mixins' as *;

.menu-hamburger {
  width: 20px;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  justify-content: center;
  height: var(--nav-height);
  margin: 0 14px;

  > span {
    background-color: var(--text-color);
    border-radius: 10px;
    height: 2px;
    margin: 2px 0;
    transition: var(--el-transition-all);
    width: 100%;
    &.hamburger {
      &-1 {
        width: 50%;
      }
      &-3 {
        width: 75%;
      }
    }
  }

  &.active {
    .hamburger {
      &-1 {
        transform-origin: bottom;
        transform: rotatez(45deg) translate(13px, 0px);
      }

      &-2 {
        transform-origin: top;
        transform: rotatez(-45deg);
      }

      &-3 {
        transform-origin: bottom;
        width: 50%;
        transform: translate(2px, -10px) rotatez(45deg);
      }
    }
  }

  @include respond-to('md') {
    display: none;
  }
}