Изменение влияния дочерних div на соседний родительский

.container {
    margin: auto;
    max-width: 1170px;
    text-align: center;
    padding: 102px 16px 122px 16px;
}

.read-more-wrap {
    margin-top: 90px;
    font-size: 20px;
    text-transform: uppercase;
    line-height: 35px;
    position: relative;
    overflow: hidden;
}

.read__more {
    margin: 66px auto 0px;
    width: 278px;
    height: 77px;
    background-color: #3498db;
    border-radius: 38px;
    padding-top: 25px;
    box-sizing: border-box;
}

.hide, .check {
    display: none;
}

.check:target ~ .hide {
    display: block;
    margin-top: 25px;
}

.check:target ~ .read__more {
    display: none;
}

.additional__info {
    background-color: #ecf0f1;
    height: 500px;
}   

.additional__info__items {
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
}

.additional__info__header {
    margin-bottom: 115px;
}

.additional__info__item {
    max-width: 554px;
    min-height: 440px;
    background-color: #ffffff;
    color: #2c3e50;
    padding: 78px 30px 70px 30px;
}

.info__item__text {
    height: 130px;
}

.show1:target ~ .read-more-wrap {
    height: 620px; 
    margin-top: 26px;
}

.show2:target ~ .read-more-wrap {
    height: 620px; 
    margin-top: 26px;
}

.info__item__header {
    margin-bottom: 0px;
}

.our__clients {
    background-color: #9b59b6;
    height: 732px;
}

.our__clients__header {
    margin-top: 300px;
}

<section class="additional__info">
  <div class="container">
    <h2 class="additional__info__header">
      minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo.
    </h2>
    <div class="additional__info__items">
      <div class="additional__info__item">
        <h2 class="info__item__header">quodsi fabulas</h2>
        <input type="checkbox" name="" class="show1 check" id="show1">
        <a href="#hide" class="hide" id="hide">close</a>
        <p class="info__item__text read-more-wrap" id="show1">
          la pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa
          quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt.
          Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem.
        </p>
        <div class="read__more">
          <a href="#show1" class="show1">Read more</a>
        </div>
      </div>
      <div class="additional__info__item">
        <h2 class="info__item__header">quodsi fabulas</h2>
        <input type="checkbox" name="" class="show2 check" id="show2">
        <a href="#hide" class="hide" id="hide">close</a>
        <p class="info__item__text read-more-wrap" id="show2">
          la pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa
          quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt.
          Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem.
        </p>
        <div class="read__more">
          <a href="#show2" class="show2">Read more</a>
        </div>
      </div>
    </div>
  </div>
</section>
<section class="our__clients">
  <div class="container">
    <h2 class="our__clients__header">our clients</h2>
  </div>
</section>