The problem with the block, the content fits into the old block, how to fix it?

Question

css

Good afternoon, recently in the subject of layout.
How to start a new block without getting into the old one?

</div>
      </div>
      <div class="header-center">
        <div class="container">
          <div class="title-block">
            <h1 class="title-1">Магазин кроссовок</h1>
            <h2 class="title-2">Современная и&nbsp;качественная&nbsp;обувь</h2>
            <?php if(!isset($_SESSION['uid'])) {?>
          <a href="<?="https://oauth.vk.com/authorize?client_id=".$vk_id."&display=page&redirect_uri=".$ssl."://".$_SERVER['SERVER_NAME']."&response_type=code&v=5.62"? class="page-button">Перейти в каталог </a>
          <?php } ?>
          <spoiler title=""></spoiler>
        </div>
      </div>
      </div>  
<div class="block">
<div class="containe"> 
<div class="random-block">  
<h1 class="random-text">Розыгрыш товара</h1>  
<a href="#" class="page-button">Принять участие</a>
</div>
</div>
</div>

.block { 

} 
  .random-block {
  max-width: 355px;


  }
.random-text{
color:#fff ;
font-size: 


}