header{ position:absolute; z-index:3; left:0; top:0;}
header > a > span{ color:#fff; }
body{ background-image:url(https://file.rh-marathon.com/img/20210813/055702_0.png); background-size:100% auto; background-attachment: fixed; }
section > div.main1{ width:100%; height:200px; background-position:center center; background-size:auto 100%;}
section > div.main2{ width:90%; display:inline-block; margin-left:5%; margin-top:2em; margin-bottom:2em;}

section > div.main2 > div.guidediv1{ width:96%; display:inline-block; text-align:left; margin:auto;}


section > div.main2 > div.guidediv1 > div{ background-color:rgba(255,255,255,0.4); width:90%; padding:3em 5%; border-radius:3em; transition-duration:0.3s; margin-top:3em; box-shadow:6px 6px 12px 3px #888; margin-bottom:12em;}
section > div.main2 > div.guidediv1 > div > h2{ display:inline-block; width:100%; text-align:center; font-size:26px; font-weight:900; margin-top:1em; position:relative; margin-bottom:2em; }

section > div.main2 > div.guidediv1 > div > div{ font-size:14px;}