:root{
  --bg:#0b0f17; --bg-2:#0e1422; --card:#121a2b; --card-2:#0f1726;
  --line:#1e2a40; --text:#e6edf6; --muted:#9fb0c8; --muted-2:#6f819c;
  --accent:#3b82f6; --accent-2:#22d3ee; --accent-3:#6366f1;
  --ok:#34d399; --warn:#fbbf24;
  --h2-inset:16px;
  --maxw:1200px; --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; background:var(--bg); color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased;
}
a{color:var(--accent-2); text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:var(--maxw); margin:0 auto; padding:0 24px}

/* ── 顶部导航 ── */
.site-header{position:sticky; top:0; z-index:50; background:rgba(11,15,23,.85);
  backdrop-filter:blur(10px); border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--maxw); margin:0 auto; padding:0 24px; height:64px;
  display:flex; align-items:center; gap:24px}
.brand{display:flex; align-items:center; gap:10px; color:var(--text); font-weight:700}
.brand-text{font-size:15px; letter-spacing:.3px}
.site-nav ul{list-style:none; display:flex; gap:6px; margin:0; padding:0}
.nav-item{position:relative}
.nav-item>a{display:inline-block; padding:10px 12px; color:var(--muted); border-radius:8px; font-size:15px}
.nav-item>a:hover{color:var(--text); background:var(--card); text-decoration:none}
.sub-menu{position:absolute; top:100%; left:0; min-width:180px; background:var(--card);
  border:1px solid var(--line); border-radius:10px; padding:6px; display:none; flex-direction:column}
.has-menu:hover .sub-menu{display:flex}
.sub-menu a{padding:8px 12px; color:var(--muted); border-radius:6px; font-size:14px}
.sub-menu a:hover{background:var(--bg-2); color:var(--text)}
.sub-toggle{display:none}
.nav-toggle{display:none; background:none; border:1px solid var(--line); color:var(--text);
  border-radius:8px; width:40px; height:36px; font-size:18px; cursor:pointer}

/* ── 面包屑 ── */
.breadcrumb{margin:18px 0 4px}
.breadcrumb ol{list-style:none; display:flex; flex-wrap:wrap; gap:6px; margin:0; padding:0; font-size:13px; color:var(--muted-2)}
.breadcrumb .sep{margin:0 4px; color:var(--muted-2)}
.breadcrumb a{color:var(--muted)}
.breadcrumb .current{color:var(--muted)}

/* ── 文章 / 产品布局 ── */
.article-layout{--h2-inset:16px; margin:8px auto 60px}
.article-grid{display:grid; grid-template-columns:minmax(0,1fr) 240px; gap:32px; align-items:start}
.article-main h1{font-size:30px; line-height:1.3; margin:8px 0 16px}
.summary-block{background:linear-gradient(135deg,rgba(59,130,246,.12),rgba(34,211,238,.08));
  border:1px solid var(--line); border-left:3px solid var(--accent); border-radius:10px; padding:14px 18px; color:var(--muted)}
.kw-line{font-size:14px; color:var(--muted); margin:10px 0 0}
.update-line{display:inline-block; font-size:13px; color:var(--muted-2); margin:6px 0 18px}
.article-body h2{font-size:22px; margin:34px 0 12px; padding-bottom:8px; border-bottom:1px solid var(--line)}
.article-body h3{font-size:18px; margin:24px 0 10px}
.article-body p{margin:0 0 14px}
.article-body ul,.article-body ol{margin:0 0 14px; padding-left:22px}
.article-body li{margin:4px 0}
.article-body blockquote{background:var(--card-2); border-left:3px solid var(--accent-3);
  margin:16px 0; padding:12px 16px; border-radius:8px; color:var(--muted)}
.article-body table{width:100%; border-collapse:collapse; margin:16px 0; font-size:14.5px;
  background:var(--card); border-radius:10px; overflow:hidden}
.article-body table th,.article-body table td{border:1px solid var(--line); padding:9px 12px; text-align:left}
.article-body table th{background:var(--bg-2); color:var(--text); font-weight:600}
.article-body code{background:var(--card-2); padding:2px 6px; border-radius:5px; font-size:13px; color:var(--accent-2)}
.article-body hr{border:none; border-top:1px solid var(--line); margin:24px 0}

/* TOC */
.toc-aside{position:sticky; top:84px; max-height:calc(100vh - 110px); overflow-y:auto}
.toc{background:var(--card); border:1px solid var(--line); border-radius:12px; padding:14px 16px}
.toc-title{font-size:13px; color:var(--muted-2); margin:0 0 8px; text-transform:uppercase; letter-spacing:1px}
.toc ul{list-style:none; margin:0; padding:0}
.toc li{margin:6px 0}
.toc a{color:var(--muted); font-size:13.5px}
.toc a:hover{color:var(--accent-2)}

/* FAQ */
.faq-section{margin-top:30px}
.faq-section>h2{font-size:22px; border-bottom:1px solid var(--line); padding-bottom:8px}
.faq-list details{border:1px solid var(--line); border-radius:10px; margin:10px 0; background:var(--card);
  padding:0 14px; transition:border-color .2s}
.faq-list details[open]{border-color:var(--accent)}
.faq-list summary{cursor:pointer; padding:12px 0; font-weight:600; color:var(--text); list-style:none}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::before{content:"+ "; color:var(--accent-2)}
.faq-list details[open] summary::before{content:"− "}
.faq-a{padding:0 0 12px; color:var(--muted)}

/* 相关 */
.related{margin-top:28px}
.related h2{font-size:20px}
.related-list{list-style:none; padding:0; margin:0}
.related-list li{background:var(--card); border:1px solid var(--line); border-radius:10px; padding:12px 16px; margin:10px 0}
.related-list a{font-weight:600}
.related-list span{display:block; color:var(--muted); font-size:14px; margin-top:4px}

/* callout */
.callout{background:var(--card-2); border:1px solid var(--line); border-left:3px solid var(--ok);
  border-radius:10px; padding:12px 16px; margin:20px 0}
.callout h3{margin:0 0 6px; font-size:16px; color:var(--ok)}
.callout p{margin:0; color:var(--muted)}

/* ── 列表页 ── */
.list-layout{display:grid; grid-template-columns:240px minmax(0,1fr); gap:32px; margin:8px auto 60px}
.cat-side{position:sticky; top:84px; align-self:start}
.cat-side-title{font-size:13px; color:var(--muted-2); text-transform:uppercase; letter-spacing:1px; margin:0 0 10px}
.category-list{list-style:none; margin:0; padding:0; border-left:2px solid var(--line)}
.category-list li a{display:block; padding:10px 14px; color:var(--muted); border-radius:0 8px 8px 0; font-size:15px}
.category-list li a:hover{background:var(--card); color:var(--text); text-decoration:none}
.category-list li.active a{background:var(--card); color:var(--accent-2); border-left:2px solid var(--accent); margin-left:-2px}
.cat-toggle{display:none}
.cat-content h1{font-size:28px; margin:4px 0 6px}
.list-desc{color:var(--muted); margin:0 0 20px}
.list-rows{list-style:none; padding:0; margin:0}
.list-row{background:var(--card); border:1px solid var(--line); border-radius:12px; padding:16px 20px; margin:12px 0}
.list-row h2{font-size:19px; margin:0 0 6px}
.list-row h2 a{color:var(--text)}
.list-meta{color:var(--muted-2); font-size:13px; margin:0 0 6px}

/* ── 页面卡片 ── */
.page-wrap{--h2-inset:48px; margin:8px auto 60px}
.page-card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:28px 32px; max-width:880px}
.page-card h1{font-size:30px; margin:0 0 18px}
.page-card h2{font-size:22px; margin:28px 0 10px; border-bottom:1px solid var(--line); padding-bottom:8px}
.page-card h3{font-size:18px; margin:20px 0 8px}
.page-card p{color:var(--muted)}
.page-card.notfound{text-align:center}
.archive-list{list-style:none; padding:0; margin:0}
.archive-list li{padding:8px 0; border-bottom:1px solid var(--line); color:var(--muted); font-size:14.5px}
.archive-list a{font-weight:600}

/* ── 首页 ── */
.hero{position:relative; overflow:hidden; border-bottom:1px solid var(--line);
  background:radial-gradient(1200px 500px at 70% -10%,rgba(59,130,246,.18),transparent),var(--bg-2)}
.hero-inner{display:grid; grid-template-columns:1.4fr .9fr; gap:40px; align-items:center; padding:70px 24px 80px}
.hero-kicker{color:var(--accent-2); letter-spacing:2px; font-size:13px; text-transform:uppercase; margin:0 0 12px}
.hero h1{font-size:42px; line-height:1.2; margin:0 0 18px; background:linear-gradient(90deg,#fff,#9fc6ff);
  -webkit-background-clip:text; background-clip:text; color:transparent}
.hero-sub{color:var(--muted); font-size:17px; max-width:560px; margin:0 0 26px}
.hero-actions{display:flex; gap:14px}
.btn{display:inline-block; padding:12px 22px; border-radius:10px; font-weight:600; font-size:15px; cursor:pointer; border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-3)); color:#fff}
.btn-primary:hover{text-decoration:none; filter:brightness(1.08)}
.btn-ghost{border-color:var(--line); color:var(--text); background:var(--card)}
.btn-ghost:hover{text-decoration:none; border-color:var(--accent)}
.hero-stats{display:grid; grid-template-columns:1fr 1fr; gap:16px}
.stat{background:var(--card); border:1px solid var(--line); border-radius:12px; padding:18px}
.stat-num{display:block; font-size:26px; font-weight:700; color:var(--accent-2)}
.stat-label{font-size:13px; color:var(--muted)}
.hero-grid-bg{position:absolute; inset:0; background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:44px 44px; opacity:.05; pointer-events:none}

.section{padding:64px 0}
.section-alt{background:var(--bg-2); border-top:1px solid var(--line); border-bottom:1px solid var(--line)}
.section-title{font-size:26px; margin:0 0 28px; text-align:center}
.cap-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:18px}
.cap-card{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:20px}
.cap-card h3{margin:0 0 8px; color:var(--accent-2); font-size:18px}
.cap-card p{margin:0; color:var(--muted); font-size:14.5px}
.cat-tiles{display:grid; grid-template-columns:repeat(5,1fr); gap:14px}
.cat-tile{background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:20px; display:flex; flex-direction:column; gap:10px; min-height:110px}
.cat-tile:hover{border-color:var(--accent); text-decoration:none}
.cat-tile h3{margin:0; color:var(--text); font-size:16px}
.cat-arrow{color:var(--accent-2); font-size:13px}
.home-articles{list-style:none; padding:0; margin:0; display:grid; gap:12px}
.home-articles li{background:var(--card); border:1px solid var(--line); border-radius:12px; padding:14px 18px}
.home-articles a{font-weight:600; font-size:16px}
.home-articles span{display:block; color:var(--muted); font-size:14px; margin-top:4px}
.more-link{text-align:center; margin-top:22px}
.section-cta{background:radial-gradient(800px 300px at 50% 0,rgba(99,102,241,.2),transparent),var(--bg-2)}
.cta-inner{text-align:center; max-width:640px; margin:0 auto}
.cta-inner h2{font-size:26px; margin:0 0 10px}
.cta-inner p{color:var(--muted); margin:0 0 20px}

/* ── 页脚 ── */
.site-footer{background:var(--bg-2); border-top:1px solid var(--line); padding:48px 0 24px}
.footer-inner{max-width:var(--maxw); margin:0 auto; padding:0 24px; display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:24px}
.footer-col h3{font-size:16px; margin:0 0 10px}
.footer-col h4{font-size:14px; color:var(--muted); margin:0 0 10px}
.footer-desc{color:var(--muted); font-size:14px; max-width:420px}
.footer-col ul{list-style:none; padding:0; margin:0}
.footer-col li{margin:6px 0}
.footer-col a{color:var(--muted); font-size:14px}
.footer-bottom{max-width:var(--maxw); margin:28px auto 0; padding:18px 24px 0; border-top:1px solid var(--line);
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; color:var(--muted-2); font-size:13px}

/* ── 悬浮胶囊 + 名片弹层 ── */
.floating-capsule{position:fixed; right:18px; top:50%; transform:translateY(-50%); z-index:60;
  display:flex; flex-direction:column; gap:10px}
.cap-btn{width:54px; height:54px; border-radius:27px; border:1px solid var(--line); background:var(--card);
  color:var(--text); display:flex; flex-direction:column; align-items:center; justify-content:center; cursor:pointer;
  box-shadow:0 8px 24px rgba(0,0,0,.4); transition:transform .15s,border-color .15s}
.cap-btn:hover{transform:scale(1.06); border-color:var(--accent)}
.cap-ico{font-size:18px; line-height:1}
.cap-txt{font-size:11px; margin-top:2px; color:var(--muted)}
.wechat-modal{position:fixed; inset:0; z-index:100; background:rgba(0,0,0,.7); display:none; align-items:center; justify-content:center}
.wechat-modal.open{display:flex}
.wechat-modal-box{position:relative; background:#fff; border-radius:12px; padding:12px}
.wechat-close{position:absolute; top:-14px; right:-14px; width:34px; height:34px; border-radius:50%; border:none;
  background:var(--accent); color:#fff; font-size:20px; cursor:pointer; line-height:1}
.wechat-tip{text-align:center; color:#333; font-size:13px; margin:8px 0 2px}

/* ── 响应式 ── */
@media (max-width:980px){
  .article-grid{grid-template-columns:1fr}
  .toc-aside{display:none}
  .list-layout{grid-template-columns:1fr}
  .cat-side{position:static; margin-bottom:14px}
  .cat-toggle{display:block; width:100%; padding:10px 14px; background:var(--card); border:1px solid var(--line);
    border-radius:10px; color:var(--text); font-size:15px; cursor:pointer; text-align:left}
  .category-list{display:none; border-left:none; margin-top:8px}
  .category-list.open{display:block}
  .hero-inner{grid-template-columns:1fr; padding:48px 24px 56px}
  .hero h1{font-size:32px}
  .cap-grid{grid-template-columns:1fr 1fr}
  .cat-tiles{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nav-toggle{display:block; margin-left:auto}
  .site-nav{display:none; position:absolute; top:64px; left:0; right:0; background:var(--bg-2);
    border-bottom:1px solid var(--line); padding:8px 24px}
  .site-nav.open{display:block}
  .site-nav ul{flex-direction:column; gap:2px}
  .sub-menu{position:static; display:none; border:none; background:transparent; padding:0 0 0 12px}
  .has-menu.open .sub-menu{display:flex}
  .sub-toggle{display:inline-block; background:none; border:none; color:var(--muted); cursor:pointer; margin-left:6px}
  .cap-grid,.cat-tiles,.footer-inner{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
}