sunpochin

<h1 class="text-center text-primary">窩窩</h1>

<img class="img-responsive" src="https://scontent.ftpe8-4.fna.fbcdn.net/v/t1.0-9/12003037_10153541892657570_7060759116628987471_n.jpg?oh=1a174c7aef61db01fbd5a938d9ae66c0&oe=5A5211CC" alt="wowo"
     
</img>

sunpochin

@media (max-width: 800px) {
  #gallery img {
    width: 50%;
  }
}