html {
  min-height: 100%;
  background-size: cover; /*ボックス全体をカバーする大きさで表示*/
  background-image: url('http://laifuku-life.kyoto/img/ent1.jpg');
  background-repeat: no-repeat;
  background-position: center bottom;/*写真の見せたい場所を調整*/
}

body{
  min-height:100%;
  color: #fff;
  }
  
  .box {
  width: 100vw;
  height: auto;
  min-height: 100vh;
  
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;

  /* 左右中央寄せ */
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;

  /* 上下中央寄せ */
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  
  padding: 30px;
  box-sizing: border-box;
}

.cp_link {
	position: relative;
	padding: 0.1em 0.3em;
	display: inline-block;
	transition: .3s;
	color: #00ACC1;
}
.cp_link::before,
.cp_link::after {
	position: absolute;
	content: '';
	width: 0;
	height: 1px;
	background-color: #00ACC1;
	transition: .3s;
}
.cp_link::before {
	top: 0;
	left: 0;
}
.cp_link::after {
	bottom: 0;
	right: 0;
}
.cp_link:hover::before,
.cp_link:hover::after {
	width: 100%;
}