html{
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-image: url(../image/背景.jpg);
  background-position: center center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-size: cover;
}

h2{
  font-family: 'Caveat', cursive;
}
/*body {
background-image: url(背景.jpg);
background-position: center center;
background-repeat: no-repeat;
background-attachment: fixed;
background-size: cover;
background-color: #464646;
}*/

.first_blue{
  color: #5bc0de;
}
.first_orange{
  color: #ffa275;
}
.first_orange_h1{
  color: #ff9e1c;
}

header {
  font-family: 'Economica', sans-serif;
  margin-left: -15px;
  margin-right: -15px;
  width: 100%;
  padding: 20px 10% 10px 10px;
  background-color: #858585;
  position: fixed;
  top: 0;
  display: flex;
  align-items: center;
  z-index: 999;
}

a {
  text-decoration: none;
  color: #ffffff;
}

ul {
  list-style: none;
  margin: 0;
  display: flex;
}

li {
  margin: 0 0 0 30px;
  font-size: 100%;
}

nav {
  margin: -10px 0 0 auto;
}

.main-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: url('main_visual.jpg') top center / cover no-repeat;
}
h2 {
  margin: 0;
  font-size: 6vmax;
  font-weight: normal;
  color: #858585;
}
h3{
  margin: 0;
  color: #ffffff;
}

.btn-wrapper {
  display: inline-flex;
  flex-direction: column;
  align-items: start;
}

.block_content{
  font-size: 150%;
  margin: auto;
  text-align: center;
  float: right;
  width:60%;
}

.block_1{
  display: inline-block;
  font-family: 'Economica', sans-serif;
  margin-left:-15px;
  margin-right:-15px;
  padding:2em;
  background-color: rgba(232,232,232,0.8);
  z-index: 1;
  display: flex;
}
.block_2{
  display: inline-block;
  font-family: 'Economica', sans-serif;
  margin-left:-15px;
  margin-right:-15px;
  padding:2em;
  background-color: rgba(190,231,255,0.6);
  z-index: 2;
  display: flex;
}
.block_3{
  font-family: 'Economica', sans-serif;
  margin-left:-15px;
  margin-right:-15px;
  padding:2em;
  background-color: rgba(232,232,232,0.8);
  z-index: 1;
}

.blue{
  padding: 2em;
  width: 100%;
  background-color:#7abdff;
}

.id{
  margin-top:-80px;
  padding-top:100px;
}

.textcenter{
  text-align: center;
}