header{
    text-align:center;
    color:#494949;
}

section{
    margin:20px;
}

.start p{
font-family:sans-serif;
  font-size:20px;
}

.ttl_line2 {
  font-weight: bold;
  font-family: sans-serif;
  font-size:2.5em;
  border-bottom: 2px solid #67a7e0;
  padding: 0.3em;
  margin-bottom: 0.3em;
}
.ttl_line2:first-letter {
  font-size: 1.5em;
  color: #67a7e0;
}

/*ナビゲーション*/
*{box-sizing: border-box;}

ul.gnav-navi-1{
background: #67a7e0;
padding: 0;
text-align: center;
font-family: sans-serif;
}
ul.gnav-navi-1 li{
display: inline-block;
}


ul.gnav-navi-1 li a{
display: block;
padding: 1em;
color: #fff;
text-decoration: none;
}
ul.gnav-navi-1 a::first-line{
font-size: 16px;
font-weight: bold;
}

ul.gnav-navi-1 li:hover{
background: #6783e0;
}


/*ボタン*/

/*まずはお決まりのボックスサイズ算出をborer-boxに */
*,
*:before,
*:after {
  -webkit-box-sizing: inherit;
  box-sizing: inherit;
}

html {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  font-size: 62.5%;/*rem算出をしやすくするために*/
}

.btn,
a.btn,
button.btn {
  font-size: 1.6rem;
  font-family: sans-serif;
  font-weight: 700;
  line-height: 1.5;
  position: relative;
  display: inline-block;
  padding: 1rem 4rem;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  -webkit-transition: all 0.3s;
  transition: all 0.3s;
  text-align: center;
  vertical-align: middle;
  text-decoration: none;
  letter-spacing: 0.1em;
  color: #212529;
  border-radius: 0.5rem;
}

a.btn-flat {
  overflow: hidden;
  padding: 1.5rem 6rem;
  color: #494949;
  border-radius: 0;
  background: #f0f0f0;
}

a.btn-flat span {
  position: relative;
}

a.btn-flat:before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  content: '';
  -webkit-transition: all .5s ease-in-out;
  transition: all .5s ease-in-out;
  -webkit-transform: translateX(-96%);
  transform: translateX(-96%);
  background: #9cc3e6;
}

a.btn-flat:hover:before {
  -webkit-transform: translateX(0%);
  transform: translateX(0%);
}