:root{--primary:#2563eb;--ink:#182b49;--muted:#64748b;--line:#dce6f3}
*{box-sizing:border-box}
body{margin:0;background:#f4f7fc;color:var(--ink);font:15px/1.85 -apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,p{margin-top:0}
.public-header{background:#fff;border-bottom:1px solid var(--line);padding:22px max(24px,calc((100% - 1160px)/2));display:flex;align-items:center;justify-content:space-between;gap:25px}
.public-brand{font-size:24px;font-weight:700;letter-spacing:-.5px;white-space:nowrap}
.public-header nav{display:flex;gap:26px;font-size:13px}
.public-header nav{flex-wrap:wrap;gap:10px 20px}
.public-main{max-width:1208px;margin:auto;padding:32px 24px 64px;min-height:75vh}
.public-hero{padding:28px 0 25px;border-bottom:1px solid #dce6f3;margin-bottom:24px}
.eyebrow{font-size:11px;color:#64748b;letter-spacing:2px;margin-bottom:6px}
.public-hero h1{font-size:35px;margin-bottom:8px;letter-spacing:-1px}
.public-hero p{color:var(--muted);max-width:700px;margin-bottom:5px}
.category-tabs{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0}
.category-tabs a{background:white;border:1px solid var(--line);padding:5px 14px;border-radius:5px;font-size:12px}
.category-tabs a.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.public-grid{display:grid;grid-template-columns:minmax(0,1fr) 255px;gap:25px}
.seo-card{display:flex;gap:23px;background:#fff;border:1px solid var(--line);border-radius:9px;margin-bottom:16px;padding:16px}
.seo-cover{flex:0 0 185px;min-height:165px;padding:14px 17px;border-radius:5px;background:linear-gradient(135deg,#1d4ed8,#3b82f6);color:#fff;display:flex;flex-direction:column;justify-content:space-between;overflow:hidden}
.seo-cover:hover{text-decoration:none}
.seo-cover span{font-size:11px;letter-spacing:1px}
.seo-cover strong{font-size:31px;letter-spacing:2px;opacity:.95}
.seo-cover small{font-size:9px;letter-spacing:1px;opacity:.7}
.cover-crawl{background:linear-gradient(125deg,#1e40af,#0e7490)}
.cover-guide{background:linear-gradient(125deg,#1e3a8a,#2563eb)}
.cover-index{background:linear-gradient(125deg,#3730a3,#4f46e5)}
.seo-info{min-width:0}
.seo-info h2,.article-card h2{font-size:19px;line-height:1.5;margin:0 0 8px;font-weight:600}
.seo-info p,.article-card p{font-size:13px;color:#475569;margin:9px 0;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.seo-info small{font-size:11px;color:#64748b}
.article-meta,.byline{color:#64748b;font-size:11px}
.read-more{font-size:12px}
.article-card,.side-card,.article-detail{background:#fff;border:1px solid var(--line);border-radius:9px;padding:24px;margin-bottom:18px}
.side-card h3{font-size:15px;padding-bottom:12px;border-bottom:1px solid var(--line);margin-bottom:12px}
.side-card p{font-size:12px;color:var(--muted)}
.side-link{display:block;font-size:12px;padding:9px 0;border-bottom:1px solid #e8eef7;overflow-wrap:anywhere}
.side-card .read-more{display:block;margin-top:15px}
.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:20px}
.article-detail{padding:35px}
.article-detail h1{font-size:28px;line-height:1.55;margin-bottom:12px}
.article-body{margin-top:28px;overflow-wrap:anywhere;line-height:2}
.article-body h2{font-size:21px;margin-top:28px}
.article-body h3{font-size:18px}
.article-body img{max-width:100%;height:auto;border-radius:5px}
.article-body table{width:100%;border-collapse:collapse;font-size:13px}
.article-body td,.article-body th{padding:8px;border:1px solid var(--line)}
.article-body blockquote{margin:18px 0;padding:10px 18px;background:#eff6ff;border-left:3px solid #93c5fd}
.source-note{margin-top:30px;border-top:1px solid var(--line);padding-top:20px;font-size:12px;color:var(--muted)}
.source-note h2{font-size:17px}
.source-note p{margin-bottom:7px}
.public-footer{max-width:1160px;margin:auto;border-top:1px solid var(--line);padding:25px 0 32px;display:flex;justify-content:space-between;font-size:12px;color:#64748b}
.public-footer span{font-size:11px}
.empty{padding:50px;background:#fff;border:1px solid var(--line);border-radius:8px;text-align:center;color:var(--muted)}
@media(max-width:950px){.public-grid{grid-template-columns:1fr}
.public-grid aside{display:none}
.public-footer{margin:0 24px}
}
@media(max-width:620px){.public-header{padding:16px 18px;flex-direction:column;align-items:flex-start;gap:8px}
.public-brand{font-size:21px}
.public-main{padding:15px 16px 40px}
.public-hero h1{font-size:28px}
.public-hero{padding:20px 0}
.seo-card{gap:14px;padding:12px;align-items:flex-start}
.seo-cover{flex-basis:90px;min-height:130px;padding:12px 9px}
.seo-cover strong{font-size:19px;letter-spacing:0}
.seo-cover small{font-size:8px}
.seo-info h2{font-size:16px}
.seo-info p{font-size:12px;-webkit-line-clamp:2}
.seo-info small{display:none}
.article-detail{padding:22px 18px}
.article-detail h1{font-size:23px}
.article-body{font-size:14px}
.public-footer{display:block}
.public-footer span{display:block}
}