<div class="list">
  <div class="article">
  <div class="article__img-container">
    <div class="article__img" style="background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/2015738/news__img_2.jpg) no-repeat center center; background-size: cover;">
    </div>
  </div>
  <div class="article__title">Заголовок новости</div>
  <div class="article__content">Далеко-далеко за, словесными горами в стране гласных и согласных живут рыбные тексты.</div>
  <div class="article__info">
    <a href="#" class="btn btn_type_8"><span class="btn__content">Читать
      подробнее</span></a>
    <div class="article__date">
      01/01/2019
    </div>
  </div>
</div>
<!-- END  article  -->
  <div class="article">
  <div class="article__img-container">
    <div class="article__img" style="background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/2015738/news__img_2.jpg) no-repeat center center; background-size: cover;">
    </div>
  </div>
  <div class="article__title">Заголовок новости</div>
  <div class="article__content">Далеко-далеко за, словесными горами в стране гласных и согласных живут рыбные тексты.</div>
  <div class="article__info">
    <a href="#" class="btn btn_type_8"><span class="btn__content">Читать
      подробнее</span></a>
    <div class="article__date">
      01/01/2019
    </div>
  </div>
</div>
<!-- END  article  -->
  <div class="article">
  <div class="article__img-container">
    <div class="article__img" style="background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/2015738/news__img_2.jpg) no-repeat center center; background-size: cover;">
    </div>
  </div>
  <div class="article__title">Заголовок новости</div>
  <div class="article__content">Далеко-далеко за, словесными горами в стране гласных и согласных живут рыбные тексты.</div>
  <div class="article__info">
    <a href="#" class="btn btn_type_8"><span class="btn__content">Читать
      подробнее</span></a>
    <div class="article__date">
      01/01/2019
    </div>
  </div>
</div>
<!-- END  article  -->
  <div class="article">
  <div class="article__img-container">
    <div class="article__img" style="background: url(https://s3-us-west-2.amazonaws.com/s.cdpn.io/2015738/news__img_2.jpg) no-repeat center center; background-size: cover;">
    </div>
  </div>
  <div class="article__title">Заголовок новости</div>
  <div class="article__content">Далеко-далеко за, словесными горами в стране гласных и согласных живут рыбные тексты.</div>
  <div class="article__info">
    <a href="#" class="btn btn_type_8"><span class="btn__content">Читать
      подробнее</span></a>
    <div class="article__date">
      01/01/2019
    </div>
  </div>
</div>
<!-- END  article  -->
</div>

/* article */

.article {
  display: flex;
  flex-direction: column;
  width: calc(50% - 20px);
  margin: 10px;
  transition: .3s all;
  height: 320px;
}

.article_first {
  width: calc(55% - 20px);
}

.article_first + .article  {
  width: calc(45% - 20px);
}

.article_second {
  width: calc(45% - 20px);
}

.article_second + .article  {
  width: calc(55% - 20px);
}

.article__img-container {
  height: 120px;
  position: relative;
  overflow: hidden;
  transition: .3s all;
}

.article_first .article__img-container,
.article_second + .article .article__img-container {
  height: 160px;
}

.article__img {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background: url(../images/news__img_2.jpg) no-repeat center center;
  background-size: cover;
  transition: 0.3s all;
}

.article__title {
  color: #8c570a;
  font-weight: 700;
  font-size: 22px;
  padding: 20px 0;
}

.article__content {
  color: #85878d;
  font-size: 16px;
  line-height: 20px;
  height: 95px;
  overflow: hidden;
}

.article__info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 15px;
}

.article__date {
  color: #737373;
  font-family: "Candara";
  font-size: 15px;
}

.list {
  max-width: 600px;
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  flex-wrap: wrap;
  margin: 0 auto;
}

document.querySelectorAll('.article').forEach((element, index, array) => {

   element.addEventListener('mouseover', event => {
     
    document.querySelectorAll('.article_first').forEach((element) => {
      element.classList.remove('article_first');
    });
    document.querySelectorAll('.article_second').forEach((element) => {
      element.classList.remove('article_second');
    });
     
    if(index%2 == 0 ) {
      element.classList.add('article_first');
    } else {
      element.previousElementSibling.classList.add('article_second');
    }

  });
});


document.querySelector('.list').addEventListener('mouseout', event => {
 
  document.querySelectorAll('.article').forEach((element) => {
    element.classList.remove('article_first');
  });
  document.querySelectorAll('.article').forEach((element) => {
    element.classList.remove('article_second');
  });
     
 
});