.footer_fix_btn {
    position: fixed;
    bottom: 10px;
	left: 0px;
    width: 100%;
    z-index: 100;
}
.footer_fix_btn img {
  position:relative;
    width: 94%;
  max-width:730px;
    margin-left : auto;
    margin-right: auto;
    text-align: initial;
}
.is-fix {
  display: none!important;
}
.footer_fix_btn img:after {
    content: '';
    position: absolute;
    top: -100px;
    left: -100px;
    width: 50px;
    height: 50px;
    background-image: linear-gradient(100deg,  rgba(255, 255, 255, 0) 10%, rgba(255, 255, 255, 1) 100%, rgba(255, 255, 255, 0) 0%);
    animation-name: shiny;
    animation-duration: 3s;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
}
.fluffy {
  /* アニメーション名 アニメーションにかかる時間 アニメーションの繰り返し回数 */
  /* fluffy 3秒 無限ループ */
  animation: fluffy 2s infinite;
}

@keyframes fluffy {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@media screen and (max-width:780px) {
.footer_fix_btn img {
  position:relative;
    width: 96%;
    max-width:96%;
    margin-left : auto;
    margin-right: auto;
    text-align: initial;
}
}