@media (max-width:670px) {

  .top-wrapper h1 {
    font-size: 35px;
  }

  .product-wrapper h2 {
    font-size: 35px;
  }

  .introduce-wrapper h2 {
    font-size: 35px;
  }


  .products {
    flex-direction: column;
  }

  .introduces {
    flex-direction: column;
  }
  
}