@media screen and ( max-width : 768px ) {
  img {
    max-width: 100%;
    height: auto;
    width: auto;
  }
  body {
    font-size: 14px;
    font-family: "游ゴシック体", "メイリオ", "ヒラギノ角ゴシック";
    padding: 0px;
    margin: 0px;
    color: #ffffff;
  }

a { text-decoration: none; }
a:link {color:#ffffff;}
a:visited {color:#ffffff;}
a:hover {color:#ffffff;}
a:active {color:#ffffff;}

  header {
    width: 100%;
    padding: 0px;
    margin: 0px;
    height: 65px;
  }
  #h_contents {
    max-width: 768px;
    padding: 0px;
    margin: 0px auto;
  }
  h1 {
    font-size: 80px;
    padding: 0px;
    margin: 0px;
    text-align: center;
  }
  h4 {
    font-size: 24px;
    padding: 0px;
    margin: 0px;
    text-align: center;
  }
  nav {
    width: 100%;
    padding: 0px;
    margin: 0px;
    background-color: #666666;
    color: white;
  }
  #gnavi {
    max-width: 768px;
    padding: 0px;
    margin: 0px auto;
    clear: both;
  }
  ul {
    list-style-type: none;
    text-align: center;
    padding: 0px;
    margin: 0px;
  }
  li {
    font-size: 16px;
    display: inline-block;
    max-width: 49%;
    width: 100%;
    margin: 0px;
    padding: 5px 0px;
  }
  footer {
    background-color: #666666;
    color: white;
    width: 100%;
    padding: 0px;
    margin: 0px;
    height: 53px;
  }
  #f_contents {
    max-width: 768px;
    padding: 0px;
    margin: 0px auto;
  }
  #contents {
    max-width: 768px;
    padding: 0px;
    margin: 0px auto;
  }
  .clear {
    clear: both;
  }
  #main {
    width: auto;
    max-width: 768px;
  }

body {
  background-color: black;
}

.top {
  position: relative;
  }

.top h1 {
  position: absolute;
  top: 50%;
  left: 50%;
  -ms-transform: translate(-50%,-50%);
  -webkit-transform: translate(-50%,-50%);
  transform: translate(-50%,-50%);
  margin:0;
  padding:0;
  }

.top h4 {
  position: absolute;
  top: 62%;
  left: 50%;
  -ms-transform: translate(-50%,-50%);
  -webkit-transform: translate(-50%,-50%);
  transform: translate(-50%,-50%);
  margin:0;
  padding:0;
  }

.top img {
  width: 100%;
  }