:root{
  --bg:#0b1220; --bg2:#0e1830; --panel:#ffffff; --ink:#16202e; --sub:#5b6b80;
  --line:#e6ecf4; --brand:#1f6feb; --brand2:#13c2c2; --accent:#ff7a1a;
  --maxw:1180px;
}
*{box-sizing:border-box}
.lead.summary{font-size:17px;line-height:1.85;color:var(--sub);background:linear-gradient(180deg,#f0f6ff,#fff);
  border-left:4px solid var(--brand);border-radius:10px;padding:14px 18px;margin:14px 0 18px}
.lead.summary::before{content:"摘要 · ";font-weight:800;color:var(--brand)}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:#f4f7fb;line-height:1.75;font-size:16px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
header.site{background:linear-gradient(120deg,var(--bg) 0%,var(--bg2) 60%,#102a4d 100%);color:#fff;
  position:sticky;top:0;z-index:50;border-bottom:1px solid rgba(255,255,255,.08)}
.nav{max-width:var(--maxw);margin:0 auto;display:flex;align-items:center;gap:22px;
  padding:14px 20px;flex-wrap:wrap}
.brand{font-weight:800;font-size:18px;letter-spacing:.5px;color:#fff;display:flex;align-items:center;gap:10px}
.brand .dot{width:10px;height:10px;border-radius:50%;background:var(--brand2);box-shadow:0 0 12px var(--brand2)}
.nav a{color:#cfe0f5;font-size:15px;font-weight:600}
.nav a:hover,.nav a.active{color:#fff;text-decoration:none}
.nav .spacer{flex:1}
.wrap{max-width:var(--maxw);margin:0 auto;padding:28px 20px}
.breadcrumb{font-size:13px;color:var(--sub);margin:6px 0 18px}
.breadcrumb a{color:var(--sub)}
h1{font-size:30px;line-height:1.3;margin:0 0 6px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:36px;align-items:start}
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow:auto;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.toc-aside h4{margin:0 0 10px;font-size:13px;color:var(--sub)}
.toc-aside a{display:block;font-size:13.5px;color:var(--ink);padding:5px 0;border:none}
.toc-aside a:hover{color:var(--brand)}
.article-main{max-width:780px}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 26px;margin-bottom:18px;
  box-shadow:0 1px 3px rgba(16,32,60,.04)}
.lead{background:linear-gradient(180deg,#eef5ff,#fff);border-left:4px solid var(--brand);
  padding:14px 18px;border-radius:10px;color:#1d2b3e;font-size:15.5px}
.keywords{margin:14px 0;font-size:13px;color:var(--sub)}
.kw{display:inline-block;background:#eef3fb;border:1px solid #dde7f5;
  padding:3px 10px;border-radius:999px;margin:3px 6px 3px 0;color:#33558a}
time{color:var(--sub);font-size:13px}
blockquote{border-left:4px solid var(--brand2);background:#f0fbfb;margin:16px 0;padding:12px 16px;color:#143b3b;border-radius:8px}
table.spec{width:100%;border-collapse:collapse;margin:16px 0;font-size:14.5px;background:#fff;table-layout:auto}
table.spec th,table.spec td{border:1px solid var(--line);padding:9px 12px;text-align:left;word-break:break-word;vertical-align:top}
table.spec th{background:#f3f7fd;color:#1f3550;font-weight:700}
table.spec td{color:#22324a}
/* 产品参数表（2 列键值）才需要固定左列宽度；文章内的多列表格不套用 */
table.spec.kv th{width:34%}
table.spec.kv td{width:66%}
@media(max-width:700px){.article-main .card{overflow-x:auto}table.spec{min-width:520px}}
.meta-time{margin:10px 0 0;color:#6b7a90;font-size:13px}
.meta-time time{font-variant-numeric:tabular-nums}
h2{font-size:22px;margin:30px 0 12px;padding-top:8px;border-top:1px dashed var(--line)}
h3{font-size:18px;margin:22px 0 10px}
p{margin:12px 0}
ul,ol{padding-left:22px;margin:12px 0}
li{margin:6px 0}
.faq details{border:1px solid var(--line);border-radius:10px;padding:12px 16px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700;color:#1b2c42}
.rel{background:#f7faff;border:1px solid #e3edfb;border-radius:12px;padding:14px 18px;margin-top:22px}
.rel a{font-weight:600}
.cols{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.pitem{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;transition:.15s}
.pitem:hover{box-shadow:0 6px 20px rgba(31,111,235,.12);transform:translateY(-2px)}
.pitem h3{margin:0 0 8px;font-size:17px}
.pitem p{font-size:13.5px;color:var(--sub);margin:0}
.cat-list{list-style:none;padding:0;margin:0}
.cat-list li{padding:9px 12px;border-radius:8px;margin:4px 0}
.cat-list li.active{background:var(--brand);color:#fff}
.cat-list li.active a{color:#fff}
.cat-list a{color:var(--ink);font-weight:600}
.hero{background:linear-gradient(120deg,#0b1220,#102a4d 70%);color:#fff;border-radius:18px;padding:40px;margin-bottom:24px}
.hero h1{color:#fff;font-size:34px}
.hero p{color:#bcd2ee;max-width:760px}
.hero .tags span{display:inline-block;background:rgba(19,194,194,.15);border:1px solid rgba(19,194,194,.4);
  color:#9fe9e9;padding:4px 12px;border-radius:999px;margin:4px 6px 4px 0;font-size:13px}
footer.site{background:#0b1220;color:#9fb3cf;margin-top:40px;padding:30px 20px}
.foot{max-width:var(--maxw);margin:0 auto;display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;font-size:13.5px}
.foot a{color:#bcd2ee}
.capsule{position:fixed;left:14px;top:50%;transform:translateY(-50%);z-index:60;display:flex;flex-direction:column;gap:10px}
.cap{display:flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);border-radius:999px;
  padding:8px 14px;box-shadow:0 6px 18px rgba(16,32,60,.16);cursor:pointer;color:var(--ink);font-weight:700;font-size:13px}
.cap:hover{text-decoration:none;border-color:var(--brand)}
.cap svg{width:18px;height:18px}
.modal-mask{position:fixed;inset:0;background:rgba(8,16,30,.7);display:none;align-items:center;justify-content:center;z-index:80}
.modal-mask.open{display:flex}
.modal-box{background:#fff;border-radius:16px;padding:18px;max-width:92vw}
.modal-box img{max-width:300px;width:300px;height:500px;object-fit:contain;display:block;border-radius:10px}
.modal-close{text-align:right;color:var(--sub);cursor:pointer;font-size:13px;padding:4px 8px}
.notfound{padding:80px 20px;text-align:center}
@media(max-width:900px){.layout{grid-template-columns:1fr}.toc-aside{display:none}.hero{padding:28px}}