body{background:#ffffcc/*#889488*/;}

nav {
  width: 100%;
  height: 70px;
  padding-top: 0px;
  position: fixed;
  top: 0;
  left: 0;
  box-sizing: border-box;
}
ul {
  display: flex;
}
li {
  list-style: none;
}
a {
  text-decoration: none;
}
a:link{color:darkblue;}
a:visited{color:purple;}
a:hover{color:red;}


body{
      background-position: right top 50px;
      background-image: url(dragon.gif);
      background-repeat  : no-repeat;
    }
/*
#page_top{
  width: 60px;
  height: 60px;
  position: fixed;
  right: 0;
  bottom: 0;
  opacity: 0.6;
}
#page_top a{
  width: 60px;
  height: 60px;
  text-decoration: none;
}
#page_top a::before{
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
  content: '\f0aa';
  font-size: 60px;
  color: #000000;
}*/