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/* 基本語法 */
#timeline_cnt .plurk .plurk_cnt .td_cnt:has(img[src='https://emos.plurk.com/da6feb43e540d206c137a98dac7a795d_w20_h20.png'])::before{
content: url(https://images.plurk.com/axJUZKIhEVxY6jwyyx1KZ.png );
display: block;
position: absolute;
top: -56px;
right: 0px;
}