body{
background-image:url(../back/hiruko.jpg);
}

#hiruko{
color:#003f8e;
font-size:3em;
font-weight:bold;
font-family:serif;
text-decoration:underline;
margin-top:20px;
spacing:0.7em;
}

.kan{
text-align:left;
padding-left:20%;
}

  /* ===================================
  スマホ、タブレット用
  横幅600pxで切り替え
  =================================== */
  
  @media screen and (max-width: 600px){
  
body{
background-size:25%;
}

#hiruko{
font-size:2em;
  }

}