<div class="line">
  <div class="line__item">
    <div class="line__item-body">
      <div class="line__item-circle"></div>
      <div class="line__item-title">Вид обучения</div>
    </div>
    <div class="line__item-drop">
      Какой-то контент
    </div>
  </div>
  <div class="line__item">
    <div class="line__item-body">
      <div class="line__item-circle"></div>
      <div class="line__item-title">Вид занятий</div>
    </div>
    <div class="line__item-drop">
      Какой-то контент
    </div>
  </div>
  <div class="line__item">
    <div class="line__item-body">
      <div class="line__item-circle"></div>
      <div class="line__item-title">Длительность</div>
    </div>
    <div class="line__item-drop">
      Какой-то контент
    </div>
  </div>
</div>

.line {
  position: relative;
  display: flex;
  justify-content: center;
  
  &:after {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background-color: #006200;
    transform: translateY(-50%);
    content: "";
  }
  
  &__item {
    position: relative;
    margin-right: 200px;
    
    &:last-of-type {
      margin-right: 0;
    }
  }
  
  &__item-circle {
    position: relative;
    z-index: 1;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #006200;
    cursor: pointer;
  }
  
  &__item-title {
    position: absolute;
    bottom: -20px;
    left: 0;
    white-space: nowrap;
    transform: translateX(calc(-50% + 20px));
  }
  
  &__item-drop {
    position: absolute;
    top: calc(100% + 40px);
    left: 0;
    width: 200px;
    padding: 20px 10px;
    color: #ffffff;
    text-align: center;
    background-color: #006200;
    transform: translateX(calc(-50% + 20px));
    opacity: 0;
    visibility: hidden;
    transition: 0.3s;
    
    &--visible {
      opacity: 1;
      visibility: visible;
    }
  }
}

document.querySelectorAll('.line__item').forEach((item) => {
  const circle = item.querySelector('.line__item-circle');
  const drop = item.querySelector('.line__item-drop');

  circle.addEventListener('click', () => {
    drop.classList.toggle('line__item-drop--visible');
  });
});