:root{
  --primary:#0b6efd;
  --primary-dark:#0a58ca;
  --ink:#1a2230;
  --muted:#5b6678;
  --line:#e4e9f2;
  --bg:#ffffff;
  --bg-soft:#f5f8ff;
  --bg-dark:#0d1b2a;
  --radius:12px;
  --maxw:1200px;
  --content-w:760px;
  --toc-w:240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;height:auto}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.35;color:var(--ink)}
h1{font-size:30px;margin:.4em 0 .6em}
h2{font-size:24px;margin:1.6em 0 .7em;padding-bottom:.3em;border-bottom:1px solid var(--line)}
h3{font-size:19px;margin:1.3em 0 .5em}
p{margin:.6em 0}
code{background:var(--bg-soft);padding:2px 6px;border-radius:6px;font-family:"SFMono-Regular",Consolas,Menlo,monospace;font-size:14px;color:#0a3d91}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:500;background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:800;font-size:20px;color:var(--ink);letter-spacing:.5px}
.brand:hover{text-decoration:none;color:var(--primary)}
.site-nav>ul{display:flex;gap:8px;list-style:none;margin:0;padding:0;align-items:center}
.site-nav a{display:block;padding:8px 12px;border-radius:8px;color:var(--ink);font-size:15px}
.site-nav a:hover{background:var(--bg-soft);text-decoration:none}
.has-sub{position:relative}
.sub-nav{position:absolute;top:100%;left:0;min-width:160px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 8px 30px rgba(13,27,42,.12);list-style:none;padding:6px 0;margin:0;display:none}
.has-sub:hover>.sub-nav{display:block}
.sub-nav a{padding:8px 16px;font-size:14px}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;font-size:20px;width:44px;height:40px;cursor:pointer}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,#0d1b2a 0%,#13315c 60%,#0b6efd 140%);color:#fff;padding:80px 0 70px}
.hero-title{font-size:42px;margin:0 0 .2em;font-weight:800}
.hero-sub{font-size:20px;opacity:.92;margin:0 0 .6em}
.hero-desc{opacity:.85;max-width:760px}
.hero-actions{margin-top:24px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 26px;border-radius:10px;font-weight:600;cursor:pointer;border:1px solid transparent}
.btn.primary{background:var(--primary);color:#fff}
.btn.primary:hover{background:var(--primary-dark);text-decoration:none}
.btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn.ghost:hover{background:rgba(255,255,255,.12);text-decoration:none}

/* ===== Entries ===== */
.entries{padding:50px 0 10px}
.entry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.entry-card{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s}
.entry-card:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(11,110,253,.12);border-color:var(--primary)}
.entry-card h3{margin:0 0 8px;color:var(--primary)}
.entry-card p{margin:0;color:var(--muted);font-size:14px}

/* ===== Inquiry ===== */
.inquiry{padding:46px 0;border-top:1px solid var(--line);margin-top:30px}
.inquiry h2{margin-top:0}
.inquiry-note{color:var(--muted)}
.inquiry-form{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}
.inquiry-form label{display:flex;flex-direction:column;font-size:14px;color:var(--muted);gap:6px}
.inquiry-form select,.inquiry-form input{padding:10px 12px;border:1px solid var(--line);border-radius:10px;font-size:15px;background:#fff;color:var(--ink)}
.inquiry-form .btn{height:44px;align-self:end}

/* ===== Featured ===== */
.featured{padding:30px 0 60px;display:grid;grid-template-columns:1fr 1fr;gap:40px}
.featured h2{margin-top:0}
.featured-list{list-style:none;padding:0;margin:0}
.featured-list li{padding:10px 0;border-bottom:1px solid var(--line)}
.more-link{display:inline-block;margin-top:10px;font-weight:600}

/* ===== Layout (detail) ===== */
.layout{display:grid;grid-template-columns:minmax(0,var(--content-w)) var(--toc-w);gap:40px;padding:40px 0;align-items:start}
.content-col{min-width:0}
.article-body{max-width:var(--content-w)}
.toc-aside{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;padding-right:8px;width:var(--toc-w)}
.toc-aside h4{margin:0 0 10px;font-size:14px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.toc-aside ol{margin:0;padding-left:18px}
.toc-aside li{margin:6px 0;font-size:14px}
.toc-aside a{color:var(--muted)}
.toc-aside a:hover{color:var(--primary)}

/* ===== Author meta / update date ===== */
.author-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:14px;margin:.4em 0 1.4em;padding:12px 0;border-bottom:1px dashed var(--line)}
.author-meta .author-name{color:var(--ink);font-weight:600}
.author-meta time{color:var(--muted)}

/* ===== Tables / blockquote ===== */
.article-body table{border-collapse:collapse;width:100%;margin:18px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.article-body th{background:var(--bg-soft);color:var(--ink)}
.article-body blockquote{margin:18px 0;padding:12px 18px;background:var(--bg-soft);border-left:4px solid var(--primary);color:var(--muted);border-radius:0 8px 8px 0}
.case-study{margin:22px 0;padding:16px 20px;background:#eef6ff;border:1px solid #cfe2ff;border-radius:var(--radius);role:note}
.case-study strong{color:var(--primary)}

/* ===== Tags ===== */
.tag-text{display:inline-block;background:var(--bg-soft);color:var(--muted);font-size:13px;padding:3px 10px;border-radius:20px;margin-right:6px}

/* ===== FAQ ===== */
.faq-section{margin:30px 0}
.faq-section h2{margin-top:0}
.faq-list details{border:1px solid var(--line);border-radius:10px;margin:10px 0;padding:0 16px;background:#fff}
.faq-list summary{cursor:pointer;padding:14px 0;font-weight:600;list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::before{content:"+";color:var(--primary);font-weight:800;margin-right:10px}
.faq-list details[open] summary::before{content:"−"}
.faq-list .faq-answer{padding:0 0 14px;color:var(--muted)}

/* ===== List pages (category list left) ===== */
.list-layout{grid-template-columns:240px minmax(0,1fr)}
.cat-side{position:sticky;top:80px;align-self:start}
.cat-toggle{display:none;width:100%;padding:10px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;font-size:15px;margin-bottom:10px}
.category-list{list-style:none;margin:0;padding:0}
.category-list li{margin:2px 0}
.category-list a{display:block;padding:10px 14px;border-radius:10px;color:var(--ink);font-size:15px}
.category-list a:hover{background:var(--bg-soft);text-decoration:none}
.category-list li.active a{background:var(--primary);color:#fff}
.cat-content{min-width:0}
.content-list{list-style:none;padding:0;margin:18px 0}
.content-item{padding:18px 0;border-bottom:1px solid var(--line)}
.content-item .item-title{font-size:19px;font-weight:600}
.content-item .item-desc{color:var(--muted);margin:6px 0}
.item-meta{font-size:13px;color:var(--muted);display:flex;gap:12px;align-items:center}
.list-intro{color:var(--muted)}

/* ===== Related / prevnext ===== */
.related-block{margin:34px 0;padding:18px;background:var(--bg-soft);border-radius:var(--radius)}
.related-block h3{margin-top:0}
.related-block ul{margin:0;padding-left:18px}
.pager{display:flex;justify-content:space-between;gap:14px;margin:30px 0;flex-wrap:wrap}
.pager a{padding:10px 16px;border:1px solid var(--line);border-radius:10px;font-size:14px}

/* ===== Author page ===== */
.author-bio{display:flex;gap:18px;align-items:flex-start;padding:18px;background:var(--bg-soft);border-radius:var(--radius);margin:10px 0 24px}
.author-bio .avatar{width:84px;height:84px;border-radius:12px;object-fit:cover;background:#dde7f5}
.author-bio .meta h2{margin:0 0 6px;border:0;padding:0}
.author-list{list-style:none;padding:0}
.author-item{padding:16px 0;border-bottom:1px solid var(--line)}

/* ===== Float rail ===== */
.float-rail{position:fixed;right:18px;top:50%;bottom:auto;transform:translateY(-50%);z-index:9999;display:flex;flex-direction:column;gap:12px;align-items:flex-end}
.float-btn{display:flex;align-items:center;gap:8px;min-width:56px;min-height:56px;padding:0 16px;border:none;border-radius:12px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;cursor:pointer;box-shadow:0 6px 20px rgba(11,110,253,.35)}
.float-btn:hover{background:var(--primary-dark)}
.float-btn[hidden]{display:none}
.weixin-dialog{border:none;padding:0;background:transparent;max-width:280px}
.weixin-dialog::backdrop{background:rgba(13,27,42,.5)}
.dialog-inner{position:relative;background:#fff;border-radius:14px;padding:10px;box-shadow:0 20px 60px rgba(0,0,0,.3)}
.dialog-inner img{display:block;width:240px;height:auto;border-radius:8px}
.dialog-close{position:absolute;top:-12px;right:-12px;width:32px;height:32px;border-radius:8px;border:none;background:#0d1b2a;color:#fff;cursor:pointer;font-size:16px}

/* ===== Breadcrumb（居中横条 + › 分隔）===== */
nav[aria-label="breadcrumb"]{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.breadcrumb{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:2px;list-style:none;margin:0 auto;padding:10px 20px;max-width:var(--maxw);font-size:14px}
.breadcrumb li{display:flex;align-items:center;white-space:nowrap}
.breadcrumb li + li::before{content:"›";margin:0 10px;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary);text-decoration:none}
.breadcrumb li:last-child a{color:var(--ink);font-weight:600}

/* ===== 底部推广条 ===== */
.has-promo{padding-bottom:56px}
.promo-bar{position:fixed;left:0;right:0;bottom:0;z-index:9000;background:linear-gradient(90deg,#0d1b2a,#13315c 60%,#0b6efd 140%);color:#fff;box-shadow:0 -4px 18px rgba(13,27,42,.25)}
.promo-inner{max-width:var(--maxw);margin:0 auto;padding:10px 44px 10px 20px;display:flex;align-items:center;justify-content:center;gap:10px;font-size:14px;line-height:1.5}
.promo-link{color:#fff}
.promo-link:hover{text-decoration:none;color:#dbe7ff}
.promo-link strong{color:#ffd76a}
.promo-tag{flex:none;display:inline-block;padding:1px 8px;border:1px solid rgba(255,255,255,.55);border-radius:999px;font-size:12px;opacity:.85}
.promo-close{position:absolute;right:14px;top:50%;transform:translateY(-50%);width:30px;height:30px;border:none;border-radius:8px;background:rgba(255,255,255,.14);color:#fff;font-size:15px;cursor:pointer}
.promo-close:hover{background:rgba(255,255,255,.28)}
@media (max-width:600px){.promo-inner{font-size:12px;padding-right:48px}}

/* ===== Footer ===== */
.site-footer{background:var(--bg-dark);color:#cdd6e4;margin-top:50px;padding:46px 0 24px}
.footer-inner{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.site-footer h3{color:#fff;margin:0 0 10px}
.site-footer h4{color:#fff;margin:0 0 12px;font-size:16px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{padding:5px 0}
.site-footer a{color:#cdd6e4}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding-top:18px;font-size:13px;color:#8a97ab}
.footer-bottom a{color:#8a97ab}

/* ===== Not found ===== */
.notfound{padding:80px 0;text-align:center}
.nav-list{list-style:none;padding:0;display:inline-flex;gap:20px;justify-content:center}
.nav-list a{font-weight:600}

/* ===== Responsive ===== */
@media (max-width:1199px){
  .layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc-aside{position:static;max-height:none;width:auto;margin:0 0 24px;padding:14px;background:var(--bg-soft);border-radius:var(--radius)}
  .toc-aside{display:none}
  .toc-aside.open{display:block}
  .entry-grid{grid-template-columns:repeat(2,1fr)}
  .inquiry-form{grid-template-columns:repeat(2,1fr)}
  .featured{grid-template-columns:1fr}
}
@media (max-width:768px){
  .nav-toggle{display:block}
  .site-nav{position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);display:none;max-height:60vh;overflow:auto}
  .site-nav.open{display:block}
  .site-nav>ul{flex-direction:column;gap:0;padding:8px}
  .sub-nav{position:static;box-shadow:none;border:none;display:none;padding-left:14px}
  .has-sub.open>.sub-nav{display:block}
  .hero{padding:54px 0 44px}
  .hero-title{font-size:32px}
  .entry-grid{grid-template-columns:1fr}
  .inquiry-form{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .list-layout{grid-template-columns:1fr}
  .cat-toggle{display:block}
  .category-list{display:none}
  .category-list.open{display:block}
  .toc-aside{display:none}
}

/* 备案信息：居中单行，公安图标与文字同行（覆盖全局 img{display:block}） */
.beian{text-align:center;white-space:nowrap}
.beian img{display:inline-block;width:14px;height:14px;vertical-align:-2px;margin:0 2px 0 0}