body{position:relative}body .iframe_area iframe{border:none;width:100%;height:100%}body .button_area{position:fixed;bottom:0;width:100%;text-align:center;box-shadow:0px -4px 4px 0px rgba(0,0,0,.04);background-color:#fff;padding:8px 0;font-family:Noto Sans JP,sans-serif;box-sizing:border-box}body .button_area .next_button{margin:0 auto;border-radius:8px;font-size:16px;font-weight:700;background:linear-gradient(90deg, #009bf3 0%, #57d9f5 100%);width:90%;height:48px;color:#fff;display:flex;justify-content:center;align-items:center;text-decoration:none;-webkit-appearance:none;-moz-appearance:none;appearance:none}body{margin:0 0 70px 0}body .iframe_area{height:100vh}body .button_area{height:70px}