:root{--bg:#fffafa;--card:#fff;--ink:#1f2937;--muted:#536071;--line:#e8e9ec;
--brand:#d71920;--brand-dark:#b3121a;--soft:#fff5f4;--accent:#fff8f8;--radius:14px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
font:16px/1.8 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px}
.site-header{background:rgba(255,255,255,.95);border-bottom:1px solid var(--line);
position:sticky;top:0;z-index:20;backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:18px;color:var(--ink);white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;
background:linear-gradient(135deg,#f04a4f,#d71920);color:#fff;font-size:16px;font-weight:800}
.brand-sub{font-weight:400;color:var(--muted);font-size:14px}
.nav{display:flex;gap:18px;flex-wrap:wrap;font-size:14px}
.nav a{color:var(--muted)}
.nav a:hover{color:var(--brand)}
.breadcrumb{font-size:13px;color:var(--muted);padding-top:18px;padding-bottom:6px}
.breadcrumb span{color:var(--ink)}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:28px;padding-top:16px;padding-bottom:46px;align-items:start}
.main{min-width:0}
.content,.side-card,.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
box-shadow:0 2px 10px rgba(177,18,26,.04)}
.content{padding:34px 38px 40px}
.article-kicker{font-size:13px;color:var(--brand);font-weight:650;letter-spacing:.02em}
h1{font-size:31px;line-height:1.4;margin:10px 0 18px;letter-spacing:-.01em}
h2{font-size:21px;line-height:1.5;margin:32px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line)}
h3{font-size:18px;margin:24px 0 10px}
p{margin:12px 0}
ul,ol{padding-left:24px}
li{margin:6px 0}
.lead-answer{background:var(--soft);border-left:3px solid var(--brand);border-radius:0 10px 10px 0;
padding:15px 20px;margin:0 0 18px;font-size:16px;line-height:1.85}
.lead-answer strong{color:var(--ink);font-weight:650}
.tag-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted);
border-bottom:1px dashed var(--line);padding-bottom:16px;margin-bottom:6px}
.tag-row>span{margin-right:2px}
.tag-row a{display:inline-block;background:var(--accent);border:1px solid #f3d6d6;
border-radius:20px;padding:2px 11px;font-size:12px;color:var(--brand-dark)}
.tag-row a:hover{text-decoration:none;background:var(--soft)}
.article-body{font-size:15.5px}
.qa{margin:0}
.qa h2{border-bottom:1px solid var(--line)}
.article-body table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--soft);font-weight:650}
.article-body blockquote{margin:16px 0;padding:10px 18px;background:var(--accent);
border-left:3px solid #f0c0c5;color:var(--muted);border-radius:0 8px 8px 0}
.article-body code{background:#faf2f2;border-radius:5px;padding:1px 5px;font-size:13px}
.doc-figure{margin:20px 0;padding:12px;background:var(--accent);border:1px solid #f3dcdc;
border-radius:12px;text-align:center}
img.doc-img{max-width:100%;height:auto;border-radius:8px;border:1px solid var(--line);background:#fff}
.img-cap{display:block;font-size:12px;color:var(--muted);margin-top:8px;line-height:1.6}
.boundary{margin-top:34px;padding:16px 20px;background:var(--accent);border:1px solid var(--line);border-radius:12px}
.boundary h2{font-size:17px;margin:0 0 6px;border:0;padding:0}
.boundary p{font-size:14px;color:var(--muted);margin:0}
.faq-block details,.faq-list details{border:1px solid var(--line);border-radius:10px;
padding:10px 16px;margin:10px 0;background:#fffdfd}
.faq-block summary,.faq-list summary{cursor:pointer;font-weight:600;font-size:15px}
.faq-block details p,.faq-list details p{font-size:14px;color:var(--muted);margin:8px 0 2px}
.related ul{list-style:none;padding:0}
.related li{padding:9px 0;border-bottom:1px dashed var(--line);display:flex;
justify-content:space-between;gap:14px;align-items:baseline}
.related li span{font-size:12px;color:var(--muted);white-space:nowrap}
.side{position:sticky;top:86px;display:grid;gap:16px}
.side-card{padding:18px 20px}
.side-card h2{font-size:15px;margin:0 0 10px;border:0;padding:0}
.side-card p{font-size:13px;color:var(--muted);margin:8px 0}
.toc{list-style:none;padding:0;margin:0;max-height:52vh;overflow:auto;font-size:13px}
.toc li{margin:4px 0}
.toc a{color:var(--muted)}
.toc a:hover{color:var(--brand)}
.side-link{font-size:13px;font-weight:600}
.site-footer{background:#fff;border-top:1px solid var(--line);padding:34px 0 22px;font-size:14px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr;gap:30px}
.footer-grid h2{font-size:14px;margin:0 0 8px;border:0;padding:0}
.footer-grid p{margin:6px 0;color:var(--muted)}
.footer-brand{font-weight:750;font-size:16px;color:var(--ink)}
.footer-boundary{font-size:12px;line-height:1.7}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
margin-top:24px;padding-top:16px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}
.page-hero{background:linear-gradient(180deg,#fff 0%,#fff5f4 100%);border-bottom:1px solid var(--line);
padding:44px 0 38px;margin-bottom:28px}
.page-hero h1{margin:0 0 12px;font-size:34px}
.page-hero p{max-width:820px;color:var(--muted);margin:8px 0;font-size:16px}
.page-main{padding-bottom:46px}
.panel{padding:26px 30px;margin-bottom:22px}
.panel h2{margin-top:0}
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px;margin:18px 0}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;color:var(--ink)}
.card:hover{text-decoration:none;border-color:#f0c0c5;box-shadow:0 4px 14px rgba(215,25,32,.09)}
.card strong{display:block;font-size:15px;margin-bottom:4px}
.card span{font-size:13px;color:var(--muted)}
.cat-list{list-style:none;padding:0;margin:0}
.cat-list li{padding:11px 0;border-bottom:1px dashed var(--line)}
.cat-list li a{font-weight:600}
.cat-list small{display:block;color:var(--muted);font-size:13px;margin-top:3px}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 24px}
.tag-cloud a{background:var(--accent);border:1px solid #f3d6d6;border-radius:20px;
padding:4px 12px;font-size:13px;color:var(--brand-dark)}
.stat-row{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0}
.stat{background:var(--soft);border-radius:12px;padding:12px 18px;min-width:130px}
.stat b{display:block;font-size:22px;color:var(--brand-dark)}
.stat span{font-size:12px;color:var(--muted)}
.aio-section{padding:22px 0;border-top:1px solid var(--line)}
.aio-section h2{border:0;padding:0;margin:0 0 10px;font-size:21px}
.note{background:var(--soft);border-radius:10px;padding:14px 18px;font-size:14px;color:var(--muted)}
.aio-lead{background:var(--soft);border-left:3px solid var(--brand);padding:12px 18px;
border-radius:0 10px 10px 0;margin:12px 0;font-weight:600}
@media(max-width:900px){.layout{grid-template-columns:1fr}.side{position:static;grid-template-columns:1fr}
.content{padding:24px 20px}.footer-grid{grid-template-columns:1fr}h1{font-size:26px}
.header-inner{padding-top:10px;padding-bottom:10px}.nav{gap:12px;font-size:13px}}
@media print{.site-header,.side,.site-footer,.related{display:none}.layout{display:block}
.content{border:0;box-shadow:none;padding:0}body{background:#fff}}