/*PAGE TOPボタン追加*/
#page_top{
width: 75px;
height: 75px;
position: fixed;
right: 25px;
bottom: 50px;
background: #003a75; /*ボタンの色*/
opacity: 0.9;
border-radius: 50%; /*角の丸み*/
}
#page_top a{
position: relative;
display: block;
width: 75px;
height: 75px;
text-decoration: none;
}
#page_top a::before{
font-family: "Font Awesome 5 Free";
content: "\f106"; /*アイコン*/
font-weight: 900;
font-size: 50px;
color: #fff; /*アイコンの色*/
position: absolute;
width: 50px;
height: 50px;
top: 0;
bottom: 0;
right: 0;
left: 0;
margin: auto;
text-align: center;
}