<div style="margin:10px 0;box-shadow:2px 3px 5px rgba(0,0,0,0.3);border-style:solid;border-width:5px;border-color:#b61 #630 #420 #630;background:#840;padding:5px;"><div style="border-style:solid;border-width:3px;border-color:#420 #630 #b61 #630;background:#840;padding:5px;"><div style="border-style:solid;border-width:2px;border-color:#420 #630 #b61 #630;background:#840;padding:3px;"><div style="border:solid 1px #630;background-color:#ffd;padding:10px;box-shadow:0px 0px 10px rgba(0,0,0,0.3) inset;color:#630;">枠内の文字</div></div></div></div>