body {
  width: 100vw;
　height: auto;
  background-color: black;
}

header{
  position: fixed;
  z-index: 10;
  width: 100vw;
　height: 50px;
  text-align: center;
  background-color: black;
}

.header-menu {
  width: 88vw;
  background-color: black;
  display: inline-block;
  float: left;
}

.menu {
  overflow: hidden;
  list-style: none;
  width: 100%;
  margin: auto;
  z-index: 20;
  list-style-type: none;
  padding-left: 0;
  text-align: center;
}

.menu-item {
  border-right: .1rem solid white;
  width: 14vw;
  height: 50px;
  padding: 10px;
  margin: 10px;
  float: left;
}

.btn {
  color: white;
  text-decoration: none;
  display: inline-block;
}

.btn:hover {
  color: black;
  background: radial-gradient(white 60%, black);
}

.menu h1 {
  font-size: 15px;
}

.menu p {
  font-size: 10px;
}

.inst {
  position: absolute;
  background-color: black;
  width: 90px;
  heigth: 50px;
  top: 15px;
  left: 89vw;
}

.inst img {
  top: 20px;
  width: 70%;
}

.btn1 {
  display: inline-block;
  width: 100%;
  heigth: 100%;
  opacity: 0.5;
}

.btn1:hover {
  /*background: radial-gradient(white 60%, black);*/
  opacity: 1;
}

main {
  position: relative;
  left: 310px;
  width: 53%;
  height: auto;
}

.main-img {
  position: absolute;
  z-index: 5;
  background-image: url("../img/main.jpg");
  top: 90px;
  width: 100%;
  height: 400px;
  background-size: cover;
  margin: 0 auto;
}

.tate {
  background: black;
}

.tate2 {
  position: absolute;
  color: black;
  z-index: 8;
  font-size: 21px;
  -ms-writing-mode: tb-rl;
  writing-mode: vertical-rl;
  top: 25px;
  left: 390px;
  width: auto;
  height: auto;
  font-weight: bold;
  animation: tateA 3s linear infinite alternate;
  float: left;
}

@keyframes tateA{
   0% { text-shadow:  2px  2px 10px #777 ,
                     -2px  2px 10px #777 ,
                      2px -2px 10px #777 ,
                     -2px -2px 10px #777;}
 100% { text-shadow:  2px  2px 10px #fff ,
                     -2px  2px 10px #fff ,
                      2px -2px 10px #fff ,
                     -2px -2px 10px #fff;}
}

.rogo {
  position: absolute;
  top: 500px;
  width: 30%;
}

.rogo a{
  opacity: 0.6;
}

.rogo a:hover{
  opacity: 1;
}

.rogo img{
  width: 100%;
}

.news {
  position: absolute;
  background-color: #F4A460;
  top: 500px;
  left: 32%;
  width: 70%;
  height: auto;
}

.news h1{
  font-size: 15px;
  padding-left: 20px
}

.news p{
  font-size: 4px;
}

footer {
  
}

.footer-menu {
  position: absolute;
  border-top: .1rem solid white;
  background-color: black;
  width: 100%;
　height: auto;
  top:  1000px;
}

.footer-item {
  list-style: none;
}

.footer-item h2 {
  color: white;
}

.footer-item p {
  color: white;
  font-size: 17px;
}