body.site{margin:0;color:#17212b;background:radial-gradient(circle at top left,rgba(49,95,255,.08),transparent 34%),radial-gradient(circle at top right,rgba(0,176,168,.08),transparent 28%),linear-gradient(180deg,#f5f8fc,#edf2f7);font-family:var(--font-serif),"PingFang SC","Hiragino Sans GB","Microsoft YaHei",serif;line-height:1.7}body.site a{color:inherit;text-decoration:none}body.site a:hover{color:#1f4cff}body.site img{display:block;max-width:100%;height:auto}body.site .chrome{min-height:100vh}body.site .site-shell{width:min(1120px,calc(100% - 28px));margin:0 auto}body.site .topbar{position:-webkit-sticky;position:sticky;top:0;z-index:30;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:rgba(245,248,252,.84);border-bottom:1px solid rgba(23,33,43,.08)}body.site .topbar-inner{display:flex;align-items:center;gap:12px;padding:14px 0}body.site .brand{min-width:0;font-weight:700;letter-spacing:.03em;color:#0f1720}body.site .brand a,body.site .brand h1{margin:0;font-size:16px;line-height:1.2}body.site .menu{margin-left:auto;border:1px solid rgba(23,33,43,.12);background:#ffffff;color:#17212b;border-radius:999px;padding:9px 14px;font:inherit;font-size:13px;box-shadow:0 8px 24px rgba(23,33,43,.08)}body.site.nav-open .menu{background:#17212b;color:#fff}body.site .nav-list{display:none;list-style:none;margin:0;padding:0 0 16px}body.site.nav-open .nav-list{display:block}body.site .nav-list>li{position:relative;border-top:1px solid rgba(23,33,43,.08)}body.site .nav-list>li>a,body.site .nav-list>li>button{display:flex;align-items:center;justify-content:space-between;width:100%;border:0;background:transparent;padding:13px 0;color:inherit;font:inherit;text-align:left}body.site .nav-list .subnav{display:none;list-style:none;margin:0 0 10px;padding:0 0 0 14px;border-left:1px solid rgba(23,33,43,.1)}body.site .nav-list li.tap>.subnav{display:block}body.site .nav-list .subnav a{display:block;padding:7px 0;color:#415063}body.site .main{padding:18px 0 34px}body.site .hero{display:grid;grid-gap:14px;gap:14px}body.site .hero-card{overflow:hidden;border-radius:24px;background:#fff;box-shadow:0 16px 40px rgba(22,34,51,.1)}body.site .hero-copy{padding:18px}body.site .article-head h1,body.site .hero-copy h1,body.site .list-head h1,body.site .page-head h1{margin:0;font-size:16px;line-height:1.35;letter-spacing:.01em}body.site .hero-copy p{margin:10px 0 0;color:#506074}body.site .feature-grid{display:grid;grid-gap:14px;gap:14px;margin-top:14px}body.site .panel{background:rgba(255,255,255,.88);border:1px solid rgba(23,33,43,.08);border-radius:20px;box-shadow:0 14px 36px rgba(23,33,43,.06);overflow:hidden}body.site .panel-head{padding:16px 16px 0}body.site .panel-head h2{margin:0;font-size:15px}body.site .panel-body{padding:14px 16px 16px}body.site .block-grid{display:grid;grid-gap:14px;gap:14px}body.site .block-card{background:#fff;border-radius:18px;overflow:hidden;border:1px solid rgba(23,33,43,.08)}body.site .block-card h3{margin:0;padding:14px 14px 0;font-size:14px}body.site .article .copy,body.site .block-card .copy{padding:12px 14px 14px}body.site .article-list,body.site .crumbs ol,body.site .friend-list,body.site .hot-list,body.site .tag-list,body.site .toc-list{list-style:none;margin:0;padding:0}body.site .friend-list,body.site .hot-list,body.site .tag-list{display:grid;grid-gap:10px;gap:10px}body.site .chip-list{display:flex;flex-wrap:wrap;gap:10px}body.site .chip-list a{display:inline-flex;align-items:center;min-height:36px;padding:0 12px;border-radius:999px;background:#e9efff;color:#203a8c}body.site .article-list{display:grid;grid-gap:14px;gap:14px}body.site .article-card,body.site .list-card{overflow:hidden;border-radius:20px;background:#fff;border:1px solid rgba(23,33,43,.08);box-shadow:0 12px 28px rgba(23,33,43,.06)}body.site .article-card .text,body.site .list-card .text{padding:14px}body.site .article .article-desc,body.site .article-card h2,body.site .list .cat-desc,body.site .list-card h2,body.site .panel h2{margin:0;font-size:14px;color:#3e4d60}body.site .crumbs{margin:0 0 14px}body.site .crumbs ol{display:flex;flex-wrap:wrap;gap:6px;color:#5b6877;font-size:13px}body.site .crumbs li{display:inline-flex;align-items:center;gap:6px}body.site .crumbs li+li:before{content:">";color:#9aa7b8}body.site .article-head,body.site .list-head,body.site .page-head{padding:14px 0 12px}body.site .page-grid{display:grid;grid-gap:14px;gap:14px}body.site .article{background:rgba(255,255,255,.9);border:1px solid rgba(23,33,43,.08);border-radius:22px;overflow:hidden;box-shadow:0 16px 38px rgba(23,33,43,.07)}body.site .article-figure{margin:0}body.site .article-figure img{width:100%}body.site .article-desc{padding-top:8px}body.site .in-article-toc{padding:14px 14px 0}body.site .in-article-toc ol{display:grid;grid-gap:8px;gap:8px;padding:12px;border-radius:16px;background:#f4f7fb}body.site .in-article-toc a{color:#274377}body.site .copy{color:#233041}body.site .copy h2{margin:1.4em 0 .5em;font-size:15px}body.site .copy p{margin:.85em 0}body.site .copy ol,body.site .copy ul{padding-left:1.2em}body.site .pager{margin-top:18px}body.site .pager nav{display:flex;justify-content:center;gap:10px;flex-wrap:wrap}body.site .pager a,body.site .pager span{min-width:40px;min-height:40px;padding:0 12px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:#fff;border:1px solid rgba(23,33,43,.1)}body.site #friend-links{margin-top:18px;padding:16px}body.site .site-foot{padding:18px 0 28px;color:#6a7887;font-size:13px}body.site .site-foot .inner{display:flex;flex-wrap:wrap;gap:10px 16px}body.site .site-foot .inner span{white-space:nowrap}@media (min-width:769px){body.site .topbar-inner{gap:18px}body.site .menu{display:none}body.site .nav-list{display:flex;align-items:center;gap:16px;margin-left:auto;padding:0}body.site .nav-list>li{border-top:0;position:relative}body.site .nav-list>li>a,body.site .nav-list>li>button{width:auto;padding:10px 0}body.site .nav-list .subnav{position:absolute;top:calc(100% + 8px);left:0;min-width:220px;padding:10px;background:#fff;border:1px solid rgba(23,33,43,.12);border-radius:16px;box-shadow:0 18px 36px rgba(23,33,43,.12)}body.site .nav-list>li:hover>.subnav{display:block}body.site .feature-grid{grid-template-columns:1.2fr .8fr;align-items:start}body.site .block-grid{grid-template-columns:repeat(2,minmax(0,1fr))}body.site .page-grid{grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);align-items:start}body.site .article-list{grid-template-columns:repeat(2,minmax(0,1fr))}}