:root{--header-height: 100rem;--header-height: 80rem}@media(max-width: 1280px){:root{--header-height: 80rem}}@media(max-width: 768px){:root{--header-height: 60rem;--header-height: 80rem}}body{font-size:16rem}@media(max-width: 768px){.sec01{margin-top:110px}}.sec01 .sec01_video_wrap{position:relative;aspect-ratio:640/360}.sec01 .sec01_video_wrap iframe{position:absolute;width:100%;height:100%;top:50%;left:50%;transform:translate(-50%, -50%)}