.shuowen-preface-structured .article-content{padding-top:0;padding-bottom:0}
.shuowen-preface-structured .article-content>.title-line-cross{margin-top:0;margin-bottom:10px}
.shuowen-preface-structured .article-content>p{margin-bottom:16px}
.shuowen-preface-structured .article-card>.article-card-header{height:31px!important}
.shuowen-preface-structured .article-card-header>[data-toggle="collapse"]{display:block;flex:1;width:auto;height:21px;margin:0;padding:0;border:0;background:transparent;color:#fff;font:inherit;line-height:21px;text-align:right;cursor:pointer}
.shuowen-preface-structured .article-card-header>[data-toggle="collapse"] .unfold{display:none}
.shuowen-preface-structured .article-card-header>[data-toggle="collapse"] .arrow{display:inline-block;margin-left:4px;transition:transform .2s linear}
.shuowen-preface-structured .article-card-header>[data-toggle="collapse"][aria-expanded=false] .fold{display:none}
.shuowen-preface-structured .article-card-header>[data-toggle="collapse"][aria-expanded=false] .unfold{display:inline}
.shuowen-preface-structured .article-card-header>[data-toggle="collapse"][aria-expanded=false] .arrow{transform:rotate(180deg)}
.shuowen-preface-structured .article-card-body[hidden]{display:none}
.shuowen-preface-structured .article-content ol{margin:0;padding-left:2.5em;list-style:decimal}
.shuowen-preface-structured .article-content ol li{margin-bottom:15px;line-height:1.5}
.shuowen-preface-structured .kxzd-cover img{display:block;height:190px;object-fit:cover}
@media(max-width:575.98px){.shuowen-preface-structured .article-content>p{margin-bottom:16px}.shuowen-preface-structured .kxzd-cover{width:160px}.shuowen-preface-structured .kxzd-cover img{height:181px}}