/* スクロールボタン */
body {
  background-color: #fff;
  padding: 100px 0 0 0;
}
p {
  margin-left: -55px;
}
@-webkit-keyframes ani-mouse {
    0% {
    opacity: 1;
    top: 29%;
    }
    15% {
    opacity: 1;
    top: 50%;
    }
    50% {
    opacity: 0;
    top: 50%;
    }
    100% {
    opacity: 0;
    top: 29%;
    }
}
@-moz-keyframes ani-mouse {
    0% {
    opacity: 1;
    top: 29%;
    }
    15% {
    opacity: 1;
    top: 50%;
    }
    50% {
    opacity: 0;
    top: 50%;
    }
    100% {
    opacity: 0;
    top: 29%;
    }
}
@keyframes ani-mouse {
    0% {
    opacity: 1;
    top: 29%;
    }
    15% {
    opacity: 1;
    top: 50%;
    }
    50% {
    opacity: 0;
    top: 50%;
    }
    100% {
    opacity: 0;
    top: 29%;
    }
}
 .scroll-btn {
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    text-align: center;
}
.scroll-btn > * {
    display: inline-block;
    line-height: 18px;
    font-size: 13px;
    font-weight: normal;
    color: #7f8c8d;
    color: #000;
    font-family: "proxima-nova", "Helvetica Neue", Helvetica, Arial, sans-serif;
    letter-spacing: 2px;
}
.scroll-btn > *:hover,
.scroll-btn > *:focus,
.scroll-btn > *.active {
    color: #000;
}
.scroll-btn > *:hover,
.scroll-btn > *:focus,
.scroll-btn > *:active,
.scroll-btn > *.active {
    opacity: 0.8;
    filter: alpha(opacity=80);
}
.scroll-btn .mouse {
    position: relative;
    display: block;
    width: 35px;
    height: 55px;
    margin: 0 auto 20px;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    border: 3px solid black;
    border-radius: 23px;
}
.scroll-btn .mouse > * {
    position: absolute;
    display: block;
    top: 29%;
    left: 50%;
    width: 8px;
    height: 8px;
    margin: -4px 0 0 -4px;
    background: black;
    border-radius: 50%;
    -webkit-animation: ani-mouse 2.5s linear infinite;
    -moz-animation: ani-mouse 2.5s linear infinite;
    animation: ani-mouse 2.5s linear infinite;