[기타] 답변입니다.

<strong><font size="8"><div style="text-align:center">D-<font color="red"><span data-inven-dday="2018-01-10"></span></font></div><div style="border:2px solid red; border-radius:10px; background-image: url('http://kstatic.inven.co.kr/upload/2017/12/03/bbs/i15562304391.jpg'); padding-top: 150; padding-bottom: 150; background-repeat: no-repeat;"><div style="display:-moz-inline-stack; display:inline-block; zoom:1; *display:inline; background-color: rgba(255, 255, 255, 0.5); margin-top: 16px; margin-left: 33px; color: #0000FF; border-radius: 3px; border: 1px solid rgba(255, 0, 0, 1); overflow:auto; font-size: 11px; padding: 1 1 1 1px;" data-inven-action="" data-no-tooltip="" data-inven-result-detail="" data-inven-nick-default="화천"><span data-inven-attr-for="input" style="float: left; width: 70px; height: 19px; font-size: 11px; color: rgba(255, 255, 255, 1); background-color: rgba(230, 0, 0, 0.5); margin: 2px 2px 2px 2px; padding: 1 1 1 4px; line-height: 0px; border: 0px solid red; border-radius:2px; text-align:center; font-weight:bold;"></span><span data-inven-attr-for="last-attack-all" style="float: left; margin: 2 2 2 2px; padding: 4px 4px 4px 4px; background-color: rgba(240, 0, 0, 0.7); color: white; border-radius:0px; border: 0; font-size: 11px; line-height: 100%; height: auto;"></span><span data-inven-attr-for="send-note" style="float: left; margin: 2 2 2 2px; padding: 4px 4px 4px 4px; background-color: rgba(245, 0, 0, 0.8); color: white; border-radius:0px; border: 0; font-size: 11px; line-height: 100%; height: auto;"></span><span data-inven-attr-for="search-profile" style="float: left; margin: 2 2 2 2px; padding: 4px 4px 4px 4px; background-color: rgba(250, 0, 0, 0.9); color: white; border-radius:0px; border: 0; font-size: 11px; line-height: 100%; height: auto;"></span><span data-inven-attr-for="action-result" data-position="out" style="background-color: rgba(255, 255, 255, 0.5); margin-top: 2px; margin-left: 33px; color: red; border-radius: 0px; border: 1px solid red; padding: 4px 6px; font-size: 11px; width: 300px;"></span></div></div></font></strong>

D-

 

2px 굵기의 빨간색 테두리를 넣고, 꼭지점을 10px만큼 동그랗게 만들었습니다.

저렇게 style 내부에 넣어주시면 됩니다:)