:root{
  --bg:#080b14; --bg-2:#0d1322; --panel:#111a2e; --panel-2:#15203a;
  --line:#22304f; --line-2:#2c3e63;
  --text:#e7edf7; --muted:#9fb0cc; --faint:#6f81a3;
  --accent:#36e0e6; --accent-2:#4f8cff; --accent-3:#7c5cff;
  --radius:14px; --maxw:1180px;
  --header-h:64px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--accent);text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.3;font-weight:700}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ── Header ── */
.site-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:60;
  background:rgba(8,11,20,.82);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{max-width:var(--maxw);margin:0 auto;height:100%;padding:0 22px;
  display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700}
.brand-name{font-size:17px;letter-spacing:.3px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.primary-nav{margin-left:auto}
.primary-nav ul{display:flex;gap:6px;list-style:none;margin:0;padding:0}
.primary-nav a{display:block;padding:8px 14px;border-radius:9px;color:var(--muted);font-size:15px;transition:.2s}
.primary-nav a:hover{color:var(--text);background:var(--panel)}
.primary-nav a.active{color:var(--text);background:linear-gradient(90deg,rgba(54,224,230,.16),rgba(79,140,255,.16));box-shadow:inset 0 0 0 1px var(--line-2)}
.nav-toggle{display:none;margin-left:auto;align-items:center;gap:8px;background:var(--panel);
  border:1px solid var(--line);color:var(--text);border-radius:10px;padding:9px 13px;font-size:14px;cursor:pointer}
.header-offset{height:var(--header-h)}

/* ── Mobile drawer ── */
@media(max-width:860px){
  .nav-toggle{display:flex}
  .primary-nav{position:fixed;top:var(--header-h);right:0;width:min(82vw,320px);height:calc(100vh - var(--header-h));
    background:var(--bg-2);border-left:1px solid var(--line);transform:translateX(100%);transition:transform .25s;z-index:59;padding:18px}
  .primary-nav.open{transform:translateX(0)}
  .primary-nav ul{flex-direction:column;gap:4px}
  .primary-nav a{padding:13px 14px;font-size:16px}
}

/* ── Hero ── */
.hero{position:relative;overflow:hidden;padding:96px 0 72px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;
  background:
    radial-gradient(900px 420px at 78% -8%,rgba(79,140,255,.22),transparent 60%),
    radial-gradient(760px 380px at 12% 12%,rgba(54,224,230,.16),transparent 60%),
    linear-gradient(180deg,#0a1020,#080b14)}
.hero-bg::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(120,150,200,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,150,200,.06) 1px,transparent 1px);
  background-size:46px 46px;mask:radial-gradient(80% 70% at 50% 30%,#000,transparent)}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:0 22px}
.hero-kicker{letter-spacing:4px;color:var(--accent);font-size:13px;margin:0 0 14px;font-weight:600}
.hero-title{font-size:clamp(30px,5vw,52px);margin:0 0 18px;letter-spacing:-.5px;
  background:linear-gradient(120deg,#fff 30%,#bcd2ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{max-width:680px;color:var(--muted);font-size:17px;margin:0 0 28px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:42px}
.btn{display:inline-flex;align-items:center;padding:12px 22px;border-radius:11px;font-weight:600;font-size:15px;transition:.2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#04121a}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-ghost{border-color:var(--line-2);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{background:var(--panel)}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px;list-style:none;margin:0;padding:22px 0 0;border-top:1px solid var(--line)}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats b{font-size:24px;color:#fff}
.hero-stats span{color:var(--faint);font-size:13px}

/* ── Sections ── */
.section{padding:64px 0;border-bottom:1px solid var(--line)}
.section-alt{background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.section-head{max-width:var(--maxw);margin:0 auto 34px;padding:0 22px}
.section-head h2{font-size:clamp(24px,3.4vw,34px);margin:0 0 10px}
.section-head p{color:var(--muted);margin:0;max-width:720px}
.center{text-align:center;margin-top:30px}

/* ── Product grid ── */
.prod-grid{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:grid;gap:18px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}
.prod-card{position:relative;display:flex;flex-direction:column;gap:8px;padding:22px;border-radius:var(--radius);
  background:linear-gradient(160deg,var(--panel),var(--bg-2));border:1px solid var(--line);transition:.2s;overflow:hidden}
.prod-card:hover{border-color:var(--line-2);transform:translateY(-3px);box-shadow:0 18px 40px rgba(0,0,0,.35)}
.prod-index{position:absolute;top:14px;right:18px;font-size:30px;font-weight:800;color:rgba(120,150,200,.18)}
.prod-card h3{margin:0;font-size:18px}
.prod-card p{margin:0;color:var(--muted);font-size:14px;min-height:42px}
.prod-go{margin-top:6px;color:var(--accent);font-size:14px;font-weight:600}

/* ── Scenes ── */
.scene-grid{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
.scene-card{padding:20px;border-radius:var(--radius);background:var(--panel);border:1px solid var(--line)}
.scene-card h3{margin:0 0 8px;font-size:17px}
.scene-card p{margin:0 0 12px;color:var(--muted);font-size:14px}
.scene-tag{display:inline-block;font-size:12px;color:var(--accent);background:rgba(54,224,230,.1);border:1px solid var(--line-2);padding:3px 10px;border-radius:20px}

/* ── Latest list ── */
.latest-list{max-width:var(--maxw);margin:0 auto;padding:0 22px;list-style:none}
.latest-list li{border-bottom:1px solid var(--line)}
.latest-list a{display:flex;gap:16px;align-items:center;padding:16px 4px;color:var(--text)}
.latest-list a:hover{color:var(--accent)}
.latest-cat{font-size:12px;color:var(--accent);border:1px solid var(--line-2);border-radius:20px;padding:3px 11px;white-space:nowrap}
.latest-title{font-size:16px}

/* ── CTA band ── */
.cta-band{text-align:center}
.cta-band h2{font-size:clamp(22px,3vw,30px);margin:0 0 10px}
.cta-band p{color:var(--muted);max-width:600px;margin:0 auto 22px}

/* ── Detail layout ── */
.detail,.list-page,.page-wrap{padding:40px 0 70px}
.detail-grid,.list-grid{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:grid;gap:40px;align-items:start}
.detail-grid{grid-template-columns:minmax(0,760px) 240px}
.list-grid{grid-template-columns:240px minmax(0,760px)}
.detail-main{min-width:0}
.breadcrumb{margin:0 0 18px;font-size:13.5px;color:var(--faint)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumb li{display:flex;align-items:center;gap:6px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{color:var(--line-2)}
.breadcrumb [aria-current]{color:var(--text)}
.detail-title{font-size:clamp(26px,3.6vw,38px);margin:0 0 18px;letter-spacing:-.4px}

/* summary + keywords */
.summary-block{display:flex;gap:12px;padding:16px 18px;border-radius:12px;background:linear-gradient(120deg,rgba(54,224,230,.07),rgba(79,140,255,.07));border:1px solid var(--line);margin-bottom:16px}
.summary-tag{flex:none;font-size:12px;font-weight:700;color:var(--accent);background:rgba(54,224,230,.12);border:1px solid var(--line-2);padding:3px 10px;border-radius:8px;height:fit-content}
.summary-block p{margin:0;color:var(--text);font-size:15px}
.keyword-line{font-size:14px;color:var(--muted);margin:0 0 22px}
.kw-label{color:var(--faint)}

/* body content */
.body-content{font-size:16px;color:#dbe4f2}
.body-content h2{font-size:23px;margin:38px 0 14px;padding-top:6px;border-top:1px solid var(--line)}
.body-content h3{font-size:18px;margin:26px 0 10px;color:#eaf1ff}
.body-content p{margin:0 0 14px}
.body-content ul,.body-content ol{padding-left:22px;margin:0 0 16px}
.body-content li{margin:6px 0}
.body-content strong{color:#fff}
.update-time{display:block;font-size:13px;color:var(--faint);margin:0 0 22px}
.author-line{font-size:13px;color:var(--muted);margin:0 0 22px}
.body-content blockquote{margin:18px 0;padding:14px 18px;border-left:3px solid var(--accent);background:var(--panel);border-radius:0 10px 10px 0;color:var(--muted)}
.body-content blockquote p{margin:0}
.callout{margin:18px 0;padding:14px 18px;border-radius:12px;border:1px solid var(--line-2);background:var(--panel)}
.callout-title{font-weight:700;color:var(--accent);margin-bottom:6px}

/* tables */
table.data{width:100%;border-collapse:collapse;margin:16px 0 22px;font-size:14.5px;background:var(--panel);border-radius:10px;overflow:hidden;border:1px solid var(--line)}
table.data th,table.data td{padding:11px 14px;text-align:left;border:1px solid var(--line)}
table.data th{background:var(--panel-2);color:#fff;font-weight:600}
table.data tbody tr:hover{background:rgba(79,140,255,.06)}
table.data tr:first-child th:first-child{border-top-left-radius:10px}
table.data tr:first-child th:last-child{border-top-right-radius:10px}

/* FAQ (bare <details>) */
details.faq{margin:12px 0;border:1px solid var(--line);border-radius:12px;background:var(--panel);overflow:hidden}
details.faq summary{cursor:pointer;padding:14px 18px;font-weight:600;color:var(--text);list-style:none;display:flex;gap:10px;align-items:center}
details.faq summary::-webkit-details-marker{display:none}
details.faq summary::before{content:"+";color:var(--accent);font-weight:800;font-size:18px}
details.faq[open] summary::before{content:"−"}
details.faq .faq-a{padding:0 18px 16px;color:var(--muted);margin:0}

/* related */
.related-list{list-style:none;padding:0;margin:18px 0 0}
.related-list li{padding:12px 0;border-top:1px solid var(--line)}
.related-list a{color:var(--text);font-weight:600}
.related-list span{display:block;color:var(--faint);font-size:13.5px;font-weight:400;margin-top:3px}

/* TOC aside */
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow-y:auto;
  border-left:1px solid var(--line);padding-left:18px;font-size:14px}
.toc-title{margin:0 0 10px;color:var(--faint);font-size:12px;letter-spacing:1px;text-transform:uppercase}
.toc-aside ol{list-style:none;margin:0;padding:0}
.toc-aside li{margin:4px 0}
.toc-aside .toc-lv3{padding-left:14px}
.toc-aside a{color:var(--muted)}
.toc-aside a:hover{color:var(--accent)}

/* ── List page ── */
.side-title{font-size:12px;letter-spacing:1px;text-transform:uppercase;color:var(--faint);margin:0 0 12px}
.cat-toggle{display:none;width:100%;align-items:center;justify-content:space-between;padding:11px 14px;border-radius:10px;border:1px solid var(--line);background:var(--panel);color:var(--text);font-size:15px;cursor:pointer}
.cat-chevron{transition:transform .2s}
.cat-toggle[aria-expanded="true"] .cat-chevron{transform:rotate(180deg)}

.category-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px;transition:max-height .25s ease,opacity .2s ease}
.category-list li{margin:0}
.category-list a{display:block;padding:11px 14px;border-radius:10px;color:var(--muted);border:1px solid transparent}
.category-list a:hover{background:var(--panel);color:var(--text)}
.category-list a.active{background:linear-gradient(90deg,rgba(54,224,230,.14),rgba(79,140,255,.1));color:var(--text);border-color:var(--line-2)}

@media(max-width:860px){
  .cat-toggle{display:flex}
  .category-list{max-height:0;overflow:hidden;opacity:0;margin-top:0}
  .category-list.open{max-height:600px;opacity:1;margin-top:12px}
}
@media(min-width:861px){
  .cat-toggle{display:none}
  .category-list{display:flex !important;max-height:none !important;opacity:1 !important}
}
.list-title{font-size:clamp(24px,3.2vw,32px);margin:0 0 10px}
.list-intro{color:var(--muted);margin:0 0 26px;max-width:680px}
.item-list{list-style:none;margin:0;padding:0;display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.item-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);transition:.2s;height:100%}
.item-card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.item-link{display:block;padding:18px 20px;height:100%}
.item-link h3{margin:0 0 7px;font-size:18px;color:var(--text)}
.item-summary{margin:0;color:var(--muted);font-size:14.5px;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.item-meta{display:inline-block;margin-top:10px;font-size:12.5px;color:var(--faint)}

/* ── Page wrap ── */
.page-inner{max-width:820px;margin:0 auto;padding:0 22px}
.page-title{font-size:clamp(26px,3.4vw,36px);margin:0 0 22px}
.page-lead{color:var(--muted);font-size:17px;margin:0 0 26px}
.page-wrap .body-content h2{font-size:22px;border-top:1px solid var(--line);padding-top:18px;margin-top:30px}

/* ── Solutions ── */
.sol-block{border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:18px;background:var(--panel)}
.sol-head{display:flex;align-items:center;gap:14px;margin-bottom:8px}
.sol-no{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;font-weight:800;color:#04121a;background:linear-gradient(90deg,var(--accent),var(--accent-2))}
.sol-head h2{margin:0;font-size:21px}
.sol-desc{color:var(--muted);margin:0 0 14px}
.sol-meta{display:grid;gap:8px}
.sol-meta>div{display:flex;gap:12px;font-size:14.5px;border-top:1px solid var(--line);padding-top:8px}
.sol-k{flex:none;width:84px;color:var(--faint)}
.sol-v{color:var(--text)}
.sol-flow{margin-top:26px;border:1px solid var(--line);border-radius:var(--radius);padding:22px;background:var(--bg-2)}
.flow-list{padding-left:22px;margin:12px 0 0}
.flow-list li{margin:8px 0;color:var(--muted)}

/* ── Capsule ── */
.capsule{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:70;display:flex;flex-direction:column;gap:10px}
.capsule-btn{width:54px;height:54px;border-radius:28px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  background:rgba(17,26,46,.9);border:1px solid var(--line-2);color:var(--text);cursor:pointer;font-size:11px;backdrop-filter:blur(8px);transition:.2s}
.capsule-btn:hover{border-color:var(--accent);color:var(--accent);transform:scale(1.05)}
.capsule-btn span{font-size:11px}
@media(max-width:520px){.capsule{right:12px}}

/* WeChat modal */
.wechat-modal{position:fixed;inset:0;z-index:90;display:grid;place-items:center}
.wechat-modal[hidden]{display:none}
.wechat-modal-mask{position:absolute;inset:0;background:rgba(3,6,12,.72);backdrop-filter:blur(4px)}
.wechat-card{position:relative;background:#fff;border-radius:12px;padding:8px;box-shadow:0 24px 60px rgba(0,0,0,.5)}
.wechat-card img{display:block;border-radius:8px;width:300px;height:500px;object-fit:contain}
.wechat-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:none;background:var(--panel);color:#fff;font-size:20px;cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.4)}

/* ── Footer ── */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding:48px 0 22px}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:grid;gap:28px;grid-template-columns:1.6fr 1fr 1fr 1fr}
.footer-brand .footer-name{font-weight:700;margin:8px 0 6px}
.footer-desc{color:var(--muted);font-size:14px;max-width:320px}
.footer-col h4{font-size:14px;color:var(--text);margin:0 0 12px}
.footer-col ul{list-style:none;margin:0;padding:0}
.footer-col li{margin:7px 0}
.footer-col a{color:var(--muted);font-size:14px}
.footer-col a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;text-align:center;color:var(--faint);font-size:13px}

@media(max-width:980px){
  .detail-grid,.list-grid{grid-template-columns:1fr}
  .toc-aside{display:none}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:560px){
  .footer-inner{grid-template-columns:1fr}
  .hero{ padding:70px 0 54px }
}