:root{
  --bg:#080b14;
  --bg-2:#0c111e;
  --panel:#111827;
  --panel-2:#0f1626;
  --line:rgba(120,160,220,.14);
  --line-strong:rgba(120,170,230,.28);
  --text:#e7ecf5;
  --muted:#93a0b8;
  --muted-2:#6f7d97;
  --accent:#38bdf8;
  --accent-2:#22d3ee;
  --accent-3:#3b82f6;
  --glow:rgba(56,189,248,.35);
  --radius:16px;
  --maxw:1200px;
  --shadow:0 18px 50px -22px rgba(0,0,0,.7);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Segoe UI",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  padding-bottom:46px;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.25;font-weight:700;letter-spacing:.2px}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* scroll progress */
.scroll-progress{position:fixed;top:0;left:0;height:3px;width:0;z-index:80;
  background:linear-gradient(90deg,var(--accent-3),var(--accent-2));box-shadow:0 0 12px var(--glow)}

/* ===== header ===== */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(12px);
  background:linear-gradient(180deg,rgba(8,11,20,.92),rgba(8,11,20,.7));
  border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px}
.brand-mark{display:inline-flex;filter:drop-shadow(0 0 8px var(--glow))}
.brand-text{background:linear-gradient(90deg,#dff3ff,#9fdcff);-webkit-background-clip:text;background-clip:text;color:transparent}
.site-nav{display:flex;gap:4px;flex-wrap:wrap}
.site-nav a{padding:9px 14px;border-radius:10px;color:var(--muted);font-size:15px;font-weight:600;transition:.2s}
.site-nav a:hover{color:var(--text);background:rgba(120,170,230,.08)}
.site-nav a.active{color:#eaf6ff;background:rgba(56,189,248,.12);box-shadow:inset 0 0 0 1px var(--line-strong)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:var(--text);border-radius:2px;transition:.2s}

/* ===== hero ===== */
.hero{position:relative;overflow:hidden;padding:96px 0 76px;border-bottom:1px solid var(--line)}
.hero-grid{position:absolute;inset:0;
  background-image:linear-gradient(rgba(80,140,220,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(80,140,220,.06) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(ellipse 80% 70% at 50% 30%,#000 40%,transparent 100%)}
.hero-glow{position:absolute;width:680px;height:680px;left:50%;top:-280px;transform:translateX(-50%);
  background:radial-gradient(circle,rgba(56,189,248,.18),transparent 60%);filter:blur(20px)}
.hero-inner{position:relative;text-align:center;max-width:880px;margin:0 auto}
.eyebrow{font-family:"SFMono-Regular",ui-monospace,Consolas,monospace;letter-spacing:3px;
  text-transform:uppercase;font-size:12.5px;color:var(--accent-2);margin:0 0 18px;
  padding:6px 14px;border:1px solid var(--line-strong);border-radius:999px;display:inline-block;
  background:rgba(34,211,238,.06)}
.hero-title{font-size:clamp(30px,5vw,52px);margin:0 0 20px;
  background:linear-gradient(180deg,#ffffff,#bfe2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(15px,2vw,18px);color:var(--muted);max-width:720px;margin:0 auto 30px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:13px 26px;border-radius:12px;font-weight:700;font-size:15px;
  color:#04121f;background:linear-gradient(90deg,var(--accent-3),var(--accent-2));
  box-shadow:0 10px 30px -10px var(--glow);transition:.2s;border:1px solid rgba(255,255,255,.12)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -12px var(--glow)}
.btn-ghost{display:inline-block;padding:13px 26px;border-radius:12px;font-weight:700;font-size:15px;
  color:var(--text);border:1px solid var(--line-strong);background:rgba(120,170,230,.05);transition:.2s}
.btn-ghost:hover{background:rgba(120,170,230,.12);border-color:var(--accent)}
.hero-meta{margin-top:30px;color:var(--muted-2);font-size:13.5px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.dot-sep{opacity:.5}

/* ===== stats ===== */
.stats-band{border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.stats-grid{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr);padding:30px 22px}
.stat{text-align:center;padding:14px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat-value{font-size:clamp(20px,3vw,30px);font-weight:800;color:#dff3ff;
  font-family:ui-monospace,Consolas,monospace;letter-spacing:.5px}
.stat-label{color:var(--muted);font-size:13px;margin-top:6px}

/* ===== sections ===== */
.section{padding:74px 0}
.section-alt{background:linear-gradient(180deg,var(--bg-2),var(--bg));border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-dark{background:radial-gradient(ellipse at 50% 0%,#0e1830,#080b14 70%);border-top:1px solid var(--line)}
.section-head{text-align:center;max-width:760px;margin:0 auto 44px}
.section-head.light{margin-bottom:36px}
.section-head h2{font-size:clamp(24px,3.4vw,34px);margin:6px 0 14px}
.section-sub{color:var(--muted);font-size:15.5px;margin:0}
.center-cta{text-align:center;margin-top:38px}

/* ===== grids ===== */
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}

/* entry cards (5 lines) */
.entry-card{position:relative;display:flex;flex-direction:column;gap:10px;padding:24px 20px;border-radius:var(--radius);
  background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);
  transition:.22s;overflow:hidden}
.entry-card::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 0%,rgba(56,189,248,.12),transparent 60%);opacity:0;transition:.22s}
.entry-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.entry-card:hover::before{opacity:1}
.entry-icon{color:var(--accent-2);margin-bottom:4px}
.entry-icon .ic{width:34px;height:34px}
.entry-card h3{margin:0;font-size:17.5px}
.entry-card p{margin:0;color:var(--muted);font-size:13.5px}
.entry-link{margin-top:auto;color:var(--accent);font-weight:700;font-size:13.5px}

/* layer cards */
.layer-card{padding:26px 22px;border-radius:var(--radius);background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);transition:.22s}
.layer-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.layer-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  color:var(--accent-2);background:rgba(56,189,248,.1);border:1px solid var(--line-strong);margin-bottom:16px}
.layer-icon .ic{width:28px;height:28px}
.layer-card h3{margin:0 0 10px;font-size:18px}
.layer-card p{margin:0;color:var(--muted);font-size:14px}

/* category cards */
.cat-card{display:flex;flex-direction:column;gap:10px;padding:26px 22px;border-radius:var(--radius);
  background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);transition:.22s;position:relative;overflow:hidden}
.cat-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.cat-tag{font-family:ui-monospace,Consolas,monospace;font-size:12px;color:var(--accent-2);
  letter-spacing:1px;padding:3px 9px;border:1px solid var(--line-strong);border-radius:6px;align-self:flex-start}
.cat-card h3{margin:4px 0 0;font-size:18px}
.cat-card p{margin:0;color:var(--muted);font-size:13.8px}
.cat-link{margin-top:auto;color:var(--accent);font-weight:700;font-size:13.5px}

/* product cards */
.prod-card{display:flex;flex-direction:column;border-radius:var(--radius);overflow:hidden;
  background:linear-gradient(180deg,var(--panel),var(--panel-2));border:1px solid var(--line);transition:.22s}
.prod-card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:var(--shadow)}
.prod-visual{height:120px;display:flex;align-items:center;justify-content:center;color:var(--accent-2);
  background:radial-gradient(circle at 50% 40%,rgba(56,189,248,.14),transparent 70%);border-bottom:1px solid var(--line)}
.prod-visual .ic{width:54px;height:54px}
.prod-body{padding:18px 20px;display:flex;flex-direction:column;gap:8px}
.prod-cat{font-size:12px;color:var(--accent-2);font-weight:700}
.prod-card h3{margin:0;font-size:16.5px}
.prod-body p{margin:0;color:var(--muted);font-size:13.5px}

/* solution cards */
.sol-card{padding:24px 22px;border-radius:var(--radius);background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);transition:.22s}
.sol-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.sol-card h3{margin:0 0 10px;font-size:17.5px;color:#eaf6ff}
.sol-card p{margin:0 0 14px;color:var(--muted);font-size:14px}
.chip-row{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0}
.chip{font-size:12.5px;color:var(--accent-2);padding:4px 11px;border:1px solid var(--line-strong);
  border-radius:999px;background:rgba(34,211,238,.06)}

/* service cards */
.svc-card{padding:24px 22px;border-radius:var(--radius);background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);transition:.22s}
.svc-card:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.svc-card h3{margin:0 0 10px;font-size:17.5px;color:#eaf6ff}
.svc-card p{margin:0 0 14px;color:var(--muted);font-size:14px}
.tick-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:7px}
.tick-list li{position:relative;padding-left:22px;color:var(--muted);font-size:13.5px}
.tick-list li::before{content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:50%;
  background:var(--accent-2);box-shadow:0 0 8px var(--glow)}

/* capability cards */
.cap-card{padding:24px 20px;border-radius:var(--radius);background:rgba(17,24,39,.6);border:1px solid var(--line)}
.cap-card h3{margin:0 0 10px;font-size:16.5px;color:#eaf6ff}
.cap-card p{margin:0;color:var(--muted);font-size:14px}

/* cta band */
.cta-band{margin-top:8px;padding:62px 0;background:
  radial-gradient(ellipse at 50% 0%,rgba(56,189,248,.16),transparent 60%),linear-gradient(180deg,var(--bg),var(--bg-2));
  border-top:1px solid var(--line)}
.cta-inner{text-align:center;max-width:680px;margin:0 auto}
.cta-inner h2{font-size:clamp(22px,3vw,30px);margin:0 0 12px}
.cta-inner p{color:var(--muted);margin:0 0 26px;font-size:15.5px}

/* ===== footer ===== */
.site-footer{position:relative;margin-top:0;background:linear-gradient(180deg,var(--bg-2),#060912);
  border-top:1px solid var(--line);padding:54px 0 26px;overflow:hidden}
.footer-glow{position:absolute;top:-120px;left:50%;transform:translateX(-50%);width:600px;height:300px;
  background:radial-gradient(circle,rgba(56,189,248,.1),transparent 60%);filter:blur(20px)}
.footer-grid{position:relative;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer-brand .brand{margin-bottom:14px}
.footer-tag{color:var(--accent-2);font-weight:700;margin:0 0 10px;font-size:14px}
.footer-desc{color:var(--muted);font-size:13.5px;margin:0;max-width:420px}
.footer-col h4{margin:0 0 14px;font-size:14px;color:#dff3ff;letter-spacing:1px}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px}
.footer-col a{color:var(--muted);font-size:13.8px;transition:.2s}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{position:relative;margin-top:34px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--muted-2);font-size:12.5px}
.footer-seo{color:var(--muted-2)}

/* ===== adbar ===== */
.adbar{position:fixed;left:0;right:0;bottom:0;z-index:60;display:flex;align-items:center;
  background:linear-gradient(90deg,rgba(8,14,28,.97),rgba(14,24,46,.97));
  border-top:1px solid var(--line-strong);backdrop-filter:blur(8px);
  box-shadow:0 -10px 30px -16px rgba(0,0,0,.8)}
.adbar-link{display:flex;align-items:center;gap:12px;flex:1;padding:11px 18px;color:var(--text);font-size:14px;min-width:0}
.adbar-tag{font-family:ui-monospace,Consolas,monospace;font-size:11px;font-weight:700;letter-spacing:1px;
  color:#04121f;background:linear-gradient(90deg,var(--accent-3),var(--accent-2));padding:3px 8px;border-radius:6px;flex:none}
.adbar-text{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted)}
.adbar-cta{color:var(--accent);font-weight:700;flex:none}
.adbar-close{flex:none;background:none;border:0;color:var(--muted);font-size:22px;line-height:1;
  cursor:pointer;padding:6px 14px;transition:.2s}
.adbar-close:hover{color:var(--text)}

/* ===== float bar (middle) ===== */
.float-bar{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:55;
  display:flex;flex-direction:column;gap:12px}
.float-btn{width:52px;height:52px;border-radius:14px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  cursor:pointer;color:var(--text);background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line-strong);box-shadow:var(--shadow);transition:.2s}
.float-btn:hover{border-color:var(--accent);color:var(--accent-2);transform:scale(1.05)}
.float-btn .fb-icon{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.float-btn .fb-icon .dot{fill:currentColor;stroke:none}
.float-btn .fb-label{font-size:10.5px;color:var(--muted);font-weight:700}
.float-btn:hover .fb-label{color:var(--accent-2)}

/* wecom modal */
.wecom-modal{position:fixed;inset:0;z-index:70;display:flex;align-items:center;justify-content:center;padding:20px}
.wecom-modal[hidden]{display:none}
.wecom-mask{position:absolute;inset:0;background:rgba(4,8,16,.74);backdrop-filter:blur(4px)}
.wecom-dialog{position:relative;background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line-strong);border-radius:18px;padding:22px;max-width:340px;text-align:center;
  box-shadow:0 30px 80px -30px rgba(0,0,0,.9);animation:pop .2s ease}
@keyframes pop{from{transform:translateY(10px) scale(.97);opacity:0}to{transform:none;opacity:1}}
.wecom-dialog-close{position:absolute;top:8px;right:12px;background:none;border:0;color:var(--muted);font-size:24px;cursor:pointer;line-height:1}
.wecom-dialog-close:hover{color:var(--text)}
.wecom-title{margin:0 0 14px;font-size:17px;color:#eaf6ff}
.wecom-img{width:240px;height:auto;margin:0 auto;border-radius:10px;border:1px solid var(--line)}
.wecom-tip{margin:14px 0 0;color:var(--muted);font-size:13px}

/* ===== detail pages ===== */
.detail{padding:40px 0 70px}
.page-page{padding:40px 0 70px}
.detail-head{margin-bottom:26px}
.detail-head .eyebrow{margin-bottom:12px}
.detail-head h1{font-size:clamp(24px,3.6vw,36px);margin:0 0 14px;
  background:linear-gradient(180deg,#fff,#cfe8ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.detail-summary{color:var(--muted);font-size:16px;max-width:820px;margin:0}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag-text{font-size:12px;color:var(--accent-2);padding:4px 11px;border:1px solid var(--line-strong);
  border-radius:999px;background:rgba(34,211,238,.06)}
.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 248px;gap:40px;align-items:start}
.detail-main{min-width:0}
.prose{font-size:15.5px;color:#d7deea}
.prose h2{font-size:23px;margin:34px 0 14px;padding-bottom:10px;border-bottom:1px solid var(--line);color:#eaf6ff}
.prose h3{font-size:18.5px;margin:26px 0 12px;color:#dff3ff}
.prose p{margin:0 0 15px}
.prose ul,.prose ol{padding-left:22px;margin:0 0 15px;color:#d7deea}
.prose li{margin:6px 0}
.prose strong{color:#fff}
.prose a{color:var(--accent);border-bottom:1px solid rgba(56,189,248,.3)}
.prose code{background:rgba(56,189,248,.1);border:1px solid var(--line);padding:1px 6px;border-radius:6px;
  font-family:ui-monospace,Consolas,monospace;font-size:13.5px;color:var(--accent-2)}
.prose blockquote{margin:16px 0;padding:12px 18px;border-left:3px solid var(--accent);
  background:rgba(56,189,248,.06);border-radius:0 10px 10px 0;color:var(--muted)}
.prose hr{border:0;border-top:1px solid var(--line);margin:24px 0}
.prose table{width:100%;border-collapse:collapse;margin:16px 0;font-size:14px;
  border:1px solid var(--line);border-radius:10px;overflow:hidden}
.prose th,.prose td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.prose thead th{background:rgba(56,189,248,.1);color:#eaf6ff;font-weight:700}
.prose tbody tr:nth-child(even){background:rgba(120,170,230,.04)}
.prose pre{background:#0a0f1c;border:1px solid var(--line);border-radius:10px;padding:14px;overflow:auto}
.prose pre code{background:none;border:0;padding:0}

/* spec / scenario cards */
.spec-card,.scenario-card{background:linear-gradient(180deg,var(--panel),var(--panel-2));
  border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:0 0 22px}
.spec-title{margin:0 0 14px;font-size:17px;color:#eaf6ff}
.spec-table{width:100%;border-collapse:collapse;font-size:14px}
.spec-table th,.spec-table td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.spec-table thead th{background:rgba(56,189,248,.1);color:#eaf6ff}
.spec-table td:first-child{color:var(--muted);width:34%}
.scenario-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px}
.scenario-list li{position:relative;padding-left:22px;color:#d7deea;font-size:14px}
.scenario-list li::before{content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:2px;
  background:var(--accent-2);transform:rotate(45deg)}

.related-block{margin:24px 0}
.related-block h2{font-size:19px;margin:0 0 12px;color:#eaf6ff}
.related-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.related-list a{color:var(--accent);border-bottom:1px solid rgba(56,189,248,.3)}

.callout{margin:20px 0;padding:14px 18px;border-radius:12px;border:1px solid var(--line-strong);
  background:rgba(34,211,238,.06)}
.callout-label{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--accent-2);margin:0 0 6px;font-weight:700}
.callout p{margin:0;color:#d7deea;font-size:14.5px}

/* ===== toc ===== */
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow-y:auto;
  border:1px solid var(--line);border-radius:14px;padding:16px 16px;background:linear-gradient(180deg,var(--panel),var(--panel-2))}
.toc-title{margin:0 0 12px;font-size:13px;letter-spacing:1px;text-transform:uppercase;color:var(--accent-2)}
.toc-nav ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}
.toc-nav a{display:block;padding:6px 10px;border-radius:8px;color:var(--muted);font-size:13.5px;transition:.2s;border-left:2px solid transparent}
.toc-nav a:hover{color:var(--text);background:rgba(120,170,230,.07);border-left-color:var(--accent)}
.toc-l3 a{padding-left:22px;font-size:13px}

/* ===== breadcrumb ===== */
.breadcrumb{margin:0 0 18px;font-size:13.5px;color:var(--muted-2)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:0}
.breadcrumb li:not(:last-child)::after{content:"/";margin-left:8px;color:var(--muted-2)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}

/* ===== faq ===== */
.faq-block{margin:30px 0}
.faq-block h2{font-size:22px;margin:0 0 16px;color:#eaf6ff}
.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{border:1px solid var(--line);border-radius:12px;background:linear-gradient(180deg,var(--panel),var(--panel-2));overflow:hidden}
.faq-item summary{cursor:pointer;padding:15px 18px;font-weight:700;font-size:15.5px;color:#eaf6ff;list-style:none;
  display:flex;justify-content:space-between;gap:12px;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";color:var(--accent);font-size:20px;font-weight:400;flex:none}
.faq-item[open] summary::after{content:"−"}
.faq-answer{padding:0 18px 16px;color:var(--muted);font-size:14.5px}
.faq-answer p{margin:0}

/* ===== list page ===== */
.list-page{padding:40px 0 70px}
.list-layout{display:grid;grid-template-columns:248px minmax(0,1fr);gap:36px;align-items:start}
.cat-side{position:sticky;top:84px;border:1px solid var(--line);border-radius:14px;padding:16px;
  background:linear-gradient(180deg,var(--panel),var(--panel-2))}
.cat-side-title{margin:0 0 12px;font-size:13px;letter-spacing:1px;text-transform:uppercase;color:var(--accent-2)}
.category-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:4px}
.category-list a{display:flex;justify-content:space-between;align-items:center;padding:10px 12px;border-radius:9px;
  color:var(--muted);font-size:14.5px;font-weight:600;transition:.2s;border:1px solid transparent}
.category-list a:hover{background:rgba(120,170,230,.07);color:var(--text)}
.category-list a.active{background:rgba(56,189,248,.12);color:#eaf6ff;border-color:var(--line-strong)}
.cat-count{font-size:12px;color:var(--muted-2);background:rgba(120,170,230,.08);border-radius:999px;padding:1px 8px}
.cat-head h1{font-size:clamp(22px,3vw,30px);margin:0 0 10px;color:#eaf6ff}
.cat-desc{color:var(--muted);font-size:15px;margin:0 0 20px}
.item-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:14px}
.item-row{border:1px solid var(--line);border-radius:12px;padding:18px 20px;background:linear-gradient(180deg,var(--panel),var(--panel-2));transition:.2s}
.item-row:hover{border-color:var(--line-strong);transform:translateX(3px)}
.item-title{font-size:17px;font-weight:700;color:#eaf6ff}
.item-meta{display:flex;gap:12px;color:var(--muted-2);font-size:12.5px;margin:8px 0}
.item-summary{color:var(--muted);font-size:14px;margin:0}

/* ===== contact ===== */
.contact-block{margin:24px 0}
.wecom-card{text-align:center;border:1px solid var(--line-strong);border-radius:18px;padding:28px;
  background:linear-gradient(180deg,var(--panel),var(--panel-2));max-width:420px}
.wecom-card h2{margin:0 0 10px;font-size:19px;color:#eaf6ff}
.wecom-hint{color:var(--muted);font-size:14px;margin:0 0 18px}
.wecom-img{width:240px;height:auto;margin:0 auto;border-radius:10px}
.contact-list{list-style:none;padding:0;margin:18px 0 0;display:flex;flex-direction:column;gap:8px;text-align:left}
.contact-list li{display:flex;gap:10px;font-size:14px}
.ci-label{color:var(--muted-2);min-width:46px}
.ci-value{color:var(--text)}

/* ===== solutions / services extras ===== */
.sol-grid{margin-top:30px}
.flow-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.flow-list li{border:1px solid var(--line);border-radius:14px;padding:20px;background:linear-gradient(180deg,var(--panel),var(--panel-2));position:relative}
.flow-no{font-family:ui-monospace,Consolas,monospace;font-size:20px;font-weight:800;color:var(--accent-2)}
.flow-list h4{margin:8px 0 8px;font-size:16px;color:#eaf6ff}
.flow-list p{margin:0;color:var(--muted);font-size:14px}

/* ===== archive ===== */
.archive-list{display:flex;flex-direction:column;gap:8px;margin-top:10px}
.archive-row{display:grid;grid-template-columns:120px 60px 140px 1fr;gap:14px;align-items:center;
  padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:linear-gradient(180deg,var(--panel),var(--panel-2));transition:.2s}
.archive-row:hover{border-color:var(--line-strong);transform:translateX(3px)}
.archive-date{color:var(--muted-2);font-size:13px;font-family:ui-monospace,Consolas,monospace}
.archive-type{font-size:12px;color:var(--accent-2);border:1px solid var(--line-strong);border-radius:6px;padding:2px 8px;text-align:center}
.archive-cat{color:var(--muted);font-size:13px}
.archive-title{color:#eaf6ff;font-weight:600;font-size:15px}

/* ===== 404 ===== */
.notfound{padding:120px 0;text-align:center}
.nf-code{font-family:ui-monospace,Consolas,monospace;font-size:72px;font-weight:800;margin:0;
  background:linear-gradient(90deg,var(--accent-3),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.notfound h1{font-size:28px;margin:0 0 12px}
.nf-sub{color:var(--muted);max-width:480px;margin:0 auto 26px}

/* ===== responsive ===== */
@media (max-width:1080px){
  .grid-5{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .flow-list{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:860px){
  .nav-toggle{display:flex}
  .site-nav{position:absolute;top:66px;left:0;right:0;flex-direction:column;gap:0;
    background:var(--bg-2);border-bottom:1px solid var(--line);padding:8px 14px;display:none}
  .site-nav.open{display:flex}
  .site-nav a{padding:12px 10px}
  .detail-layout{grid-template-columns:1fr}
  .toc-aside{position:static;max-height:none;margin-top:20px}
  .list-layout{grid-template-columns:1fr}
  .cat-side{position:static}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .archive-row{grid-template-columns:1fr;gap:4px}
}
@media (max-width:560px){
  .grid-5,.grid-4,.grid-3,.flow-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .float-bar{right:10px}
  .float-btn{width:46px;height:46px}
  .hero{padding:70px 0 56px}
}