:root{
  --bg:#f5f8fc; --surface:#ffffff; --ink:#16233a; --muted:#5b6b85;
  --line:#e3eaf3; --brand:#1666ff; --brand2:#13c4d6; --brand-d:#0a2a5e;
  --dark:#08122a; --dark2:#0e2444; --ok:#0fae7a; --radius:14px;
  --shadow:0 10px 30px rgba(13,38,76,.08); --maxw:1180px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
h1,h2,h3,h4{line-height:1.3;color:var(--ink);margin:0 0 .5em}
p{margin:0 0 1em}

/* header */
.site-header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:18px;height:64px}
.brand{font-weight:800;font-size:20px;letter-spacing:.5px;color:var(--brand-d);white-space:nowrap}
.brand::before{content:"";display:inline-block;width:10px;height:10px;margin-right:8px;border-radius:3px;background:linear-gradient(135deg,var(--brand),var(--brand2));vertical-align:middle}
.main-nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap}
.main-nav a{padding:8px 12px;border-radius:9px;color:var(--muted);font-size:15px;font-weight:500;transition:.18s}
.main-nav a:hover{color:var(--brand);background:#eef4ff}
.nav-cta{margin-left:6px;padding:9px 16px;border-radius:10px;background:var(--brand);color:#fff;font-weight:600;font-size:14px;white-space:nowrap;transition:.18s}
.nav-cta:hover{background:var(--brand-d)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto}
.nav-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px}

/* buttons */
.btn{display:inline-block;padding:13px 24px;border-radius:11px;font-weight:600;font-size:15px;transition:.2s;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--brand),#2f86ff);color:#fff;box-shadow:0 8px 20px rgba(22,102,255,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(22,102,255,.36)}
.btn-ghost{background:#fff;color:var(--brand-d);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}

/* hero */
.hero{position:relative;overflow:hidden;background:radial-gradient(120% 120% at 80% 0%,#103a6e 0%,#0a1c3e 55%,#08122a 100%);color:#eaf2ff}
.hero-grid-bg{position:absolute;inset:0;background-image:linear-gradient(rgba(92,170,255,.10) 1px,transparent 1px),linear-gradient(90deg,rgba(92,170,255,.10) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(120% 100% at 50% 0%,#000 30%,transparent 80%);opacity:.7}
.hero-inner{position:relative;padding:96px 22px 86px;text-align:center}
.hero-eyebrow{letter-spacing:3px;text-transform:uppercase;color:var(--brand2);font-size:13px;font-weight:700;margin:0 0 14px}
.hero-title{font-size:clamp(30px,5vw,52px);font-weight:800;color:#fff;margin:0 0 18px;letter-spacing:.5px}
.hero-sub{font-size:clamp(16px,2.2vw,20px);color:#b9ccec;max-width:780px;margin:0 auto 30px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* stats */
.stats{background:var(--surface);border-bottom:1px solid var(--line)}
.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:6px 10px}
.stat-value{font-size:30px;font-weight:800;color:var(--brand);letter-spacing:.5px}
.stat-label{color:var(--muted);font-size:14px;margin-top:4px}

/* sections */
.section{padding:70px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-title{text-align:center;font-size:clamp(24px,3.4vw,34px);font-weight:800;margin-bottom:10px}
.section-sub{text-align:center;color:var(--muted);max-width:820px;margin:0 auto 36px}

/* layer cards */
.layer-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.layer-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:.2s}
.layer-card:hover{transform:translateY(-4px);border-color:#cdddff}
.layer-icon{width:46px;height:46px;border-radius:12px;background:linear-gradient(135deg,var(--brand),var(--brand2));margin-bottom:16px;position:relative}
.layer-icon[data-icon="cube"]::after{content:"▦";color:#fff;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:22px}
.layer-icon[data-icon="target"]::after{content:"◎";color:#fff;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:22px}
.layer-icon[data-icon="gear"]::after{content:"⚙";color:#fff;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:22px}
.layer-card h3{font-size:19px;margin-bottom:8px}
.layer-card p{color:var(--muted);font-size:15px;margin:0}

/* category grid */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cat-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:.2s;position:relative}
.cat-card:hover{transform:translateY(-4px);border-color:var(--brand)}
.cat-name{font-size:18px;font-weight:700;margin-bottom:8px}
.cat-desc{color:var(--muted);font-size:14px;margin:0 0 12px}
.cat-go{color:var(--brand);font-weight:600;font-size:14px}

/* solutions */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol-grid-full{grid-template-columns:repeat(3,1fr)}
.sol-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.2s}
.sol-card:hover{transform:translateY(-4px);border-color:#cdddff}
.sol-card h3{font-size:18px;margin-bottom:10px}
.sol-card p{color:var(--muted);font-size:14px;flex:1}
.sol-points{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
.sol-points span{background:#eef4ff;color:var(--brand-d);font-size:12.5px;padding:5px 10px;border-radius:20px}
.sol-link{color:var(--brand);font-weight:600;font-size:14px}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.svc-grid-full{grid-template-columns:repeat(4,1fr)}
.svc-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:.2s}
.svc-card:hover{transform:translateY(-4px);border-color:var(--brand)}
.svc-card h3{font-size:17px;margin-bottom:10px}
.svc-card p{color:var(--muted);font-size:14px}
.svc-items{list-style:none;padding:0;margin:12px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.svc-items li{background:#f1f5fb;color:var(--muted);font-size:12.5px;padding:4px 10px;border-radius:8px}

/* capabilities */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.cap-card{background:var(--surface);border-left:3px solid var(--brand);border-radius:10px;padding:18px 20px;box-shadow:var(--shadow)}
.cap-card h3{font-size:16px;margin-bottom:6px}
.cap-card p{color:var(--muted);font-size:14px;margin:0}

/* product cards (home featured) */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.prod-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.2s}
.prod-card:hover{transform:translateY(-4px);border-color:var(--brand)}
.prod-cat{display:inline-block;font-size:12px;color:var(--brand);background:#eef4ff;padding:3px 10px;border-radius:20px;margin-bottom:10px}
.prod-name{font-size:17px;font-weight:700;margin-bottom:8px}
.prod-desc{color:var(--muted);font-size:14px;margin:0 0 12px}
.prod-go{color:var(--brand);font-weight:600;font-size:14px}

/* post list */
.post-list{list-style:none;padding:0;margin:0 0 26px;display:grid;gap:12px}
.post-list li{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 18px}
.post-list a{font-weight:600;font-size:16px;color:var(--ink);flex:1}
.post-list a:hover{color:var(--brand)}
.post-cat{font-size:12px;color:var(--muted);background:#f1f5fb;padding:3px 10px;border-radius:20px}

/* list layout (category sidebar) */
.list-layout{display:grid;grid-template-columns:230px 1fr;gap:36px;padding-top:34px;padding-bottom:60px;align-items:start}
.cat-side{position:sticky;top:84px}
.side-title{font-size:15px;color:var(--muted);margin-bottom:12px;font-weight:700}
.category-list{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--surface)}
.category-list li a{display:flex;justify-content:space-between;align-items:center;padding:12px 16px;color:var(--ink);font-size:15px;border-bottom:1px solid var(--line);transition:.15s}
.category-list li:last-child a{border-bottom:0}
.category-list li a:hover{background:#eef4ff;color:var(--brand)}
.category-list li.active a{background:var(--brand);color:#fff;font-weight:600}
.cat-count{font-size:12px;opacity:.7}
.cat-content{min-width:0}
.cat-h1{font-size:30px;font-weight:800;margin-bottom:8px}
.cat-intro{color:var(--muted);margin-bottom:26px}
.item-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.item-card{display:block;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px;transition:.2s}
.item-card:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow)}
.item-cat{font-size:12px;color:var(--brand);background:#eef4ff;padding:3px 10px;border-radius:20px}
.item-title{font-size:17px;margin:10px 0 8px}
.item-desc{color:var(--muted);font-size:14px;margin:0}
.empty-tip{color:var(--muted)}

/* detail layout */
.detail-layout{max-width:1180px;margin:0 auto;padding:30px 22px 70px}
.article-layout,.product-layout{}
.detail-head{max-width:820px;margin:0 auto 26px;text-align:center}
.detail-cat{display:inline-block;font-size:13px;color:var(--brand);background:#eef4ff;padding:4px 12px;border-radius:20px;margin-bottom:14px}
.detail-title{font-size:clamp(26px,4vw,38px);font-weight:800;margin-bottom:14px}
.detail-lead{color:var(--muted);font-size:17px;max-width:760px;margin:0 auto}
.detail-meta{display:flex;gap:18px;justify-content:center;flex-wrap:wrap;color:var(--muted);font-size:13.5px;margin-top:12px}
.detail-tags{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:14px}
.tag-text{font-size:12.5px;color:var(--muted);background:#eef2f8;padding:4px 11px;border-radius:20px}
.tag-status{background:#e6f7f0;color:var(--ok)}
.detail-body-wrap{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start;max-width:1040px;margin:0 auto}
.detail-body{max-width:760px;margin:0 auto;font-size:16.5px;color:#22304a}
.detail-body h2{font-size:24px;margin-top:34px;padding-bottom:8px;border-bottom:2px solid var(--line)}
.detail-body h3{font-size:19px;margin-top:24px}
.detail-body p{margin:0 0 16px}
.detail-body table{border-collapse:collapse;width:100%;margin:18px 0;font-size:14.5px;background:var(--surface);box-shadow:var(--shadow)}
.detail-body th,.detail-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.detail-body th{background:#eef4ff;color:var(--brand-d);font-weight:700}
.detail-body blockquote{margin:18px 0;padding:12px 18px;border-left:4px solid var(--brand);background:#eef4ff;color:var(--brand-d);border-radius:0 10px 10px 0}
.detail-body code{background:#eef2f8;padding:2px 6px;border-radius:6px;font-size:13.5px}
.detail-body pre{background:#0e2444;color:#dceaff;padding:16px;border-radius:10px;overflow:auto}
.detail-body pre code{background:none;color:inherit}

/* TOC */
.toc-aside{position:sticky;top:84px;align-self:start}
.toc{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 18px;max-height:calc(100vh - 110px);overflow:auto}
.toc h4{font-size:13px;color:var(--muted);margin:0 0 10px;text-transform:uppercase;letter-spacing:1px}
.toc ul{list-style:none;margin:0;padding:0}
.toc li a{display:block;padding:5px 0;color:var(--muted);font-size:14px;border-left:2px solid transparent;padding-left:10px;transition:.15s}
.toc li a:hover{color:var(--brand);border-left-color:var(--brand)}
.toc li.lvl-3 a{padding-left:22px;font-size:13px}

/* faq */
.faq-section{max-width:820px;margin:40px auto 0}
.block-title{font-size:22px;font-weight:800;margin-bottom:16px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:4px 18px;margin-bottom:10px}
.faq-item summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"+";color:var(--brand);font-weight:800;margin-right:10px}
.faq-item[open] summary::before{content:"−"}
.faq-item p{padding:0 0 14px;color:var(--muted);margin:0}

/* case callout */
.case-callout{max-width:820px;margin:30px auto 0;background:#eef4ff;border:1px solid #cdddff;border-radius:12px;padding:16px 20px;color:var(--brand-d);font-size:15px}

/* related */
.related-section{max-width:820px;margin:34px auto 0}
.related-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.related-list a{display:block;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 18px;font-weight:600}
.related-list a:hover{color:var(--brand);border-color:var(--brand)}

/* page */
.page-layout{max-width:900px;margin:0 auto;padding:34px 22px 70px}
.page-title{font-size:34px;font-weight:800;margin-bottom:18px}
.page-lead{color:var(--muted);margin-bottom:20px}
.page-body{font-size:16.5px;color:#22304a}
.page-body h2{font-size:24px;margin-top:30px}
.page-body h3{font-size:19px;margin-top:22px}
.page-body table{border-collapse:collapse;width:100%;margin:18px 0;font-size:14.5px;background:var(--surface);box-shadow:var(--shadow)}
.page-body th,.page-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.page-body th{background:#eef4ff}
.page-body blockquote{margin:18px 0;padding:12px 18px;border-left:4px solid var(--brand);background:#eef4ff;color:var(--brand-d)}
.page-hero{background:radial-gradient(120% 120% at 80% 0%,#103a6e,#08122a);color:#eaf2ff;padding:72px 0 56px;text-align:center}
.page-hero-title{font-size:clamp(28px,4vw,42px);font-weight:800;color:#fff;margin:0 0 12px}
.page-hero-sub{color:#b9ccec;max-width:760px;margin:0 auto;font-size:17px}

/* cta line */
.cta-line{text-align:center;margin-top:36px;color:var(--muted);font-size:16px}
.cta-line a{color:var(--brand);font-weight:600}

/* archive */
.archive-list{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.archive-item{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:12px 16px;flex-wrap:wrap}
.archive-date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}
.archive-type{font-size:11px;font-weight:700;color:#fff;background:var(--brand);padding:2px 8px;border-radius:6px}
.archive-link{font-weight:600;flex:1;min-width:200px}
.archive-link:hover{color:var(--brand)}
.archive-cat{font-size:13px;color:var(--muted)}

/* 404 */
.notfound{background:radial-gradient(120% 120% at 50% 0%,#103a6e,#08122a);color:#eaf2ff;padding:120px 22px;text-align:center;min-height:60vh}
.notfound-code{font-size:90px;font-weight:900;color:var(--brand2);margin:0}
.notfound-text{color:#b9ccec;font-size:18px;margin-bottom:26px}

/* breadcrumb */
.breadcrumb{margin-bottom:14px;font-size:13.5px;color:var(--muted)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:6px;color:#b9c6dc}
.breadcrumb a:hover{color:var(--brand)}

/* footer */
.site-footer{background:var(--dark);color:#aebfd9;padding:54px 0 22px}
.footer-grid{max-width:var(--maxw);margin:0 auto;padding:0 22px;display:grid;grid-template-columns:1.6fr repeat(3,1fr);gap:30px}
.footer-brand .brand{color:#fff;font-size:20px}
.footer-tag{color:var(--brand2);font-size:14px;margin:10px 0 8px}
.footer-desc{color:#8497b8;font-size:13.5px;max-width:340px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:9px}
.footer-col a{color:#aebfd9;font-size:14px;transition:.15s}
.footer-col a:hover{color:var(--brand2)}
.footer-bottom{max-width:var(--maxw);margin:36px auto 0;padding:18px 22px 0;border-top:1px solid rgba(255,255,255,.08);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#7e90b3}

/* adbar (bottom) */
.adbar{position:fixed;left:0;right:0;bottom:0;z-index:70;display:flex;align-items:center;background:linear-gradient(90deg,#0a2a5e,#103a6e);color:#fff;box-shadow:0 -6px 20px rgba(8,18,42,.25)}
.adbar-link{flex:1;display:flex;align-items:center;gap:14px;padding:13px 22px;color:#fff}
.adbar-badge{background:var(--brand2);color:#06243a;font-weight:800;font-size:12px;padding:4px 10px;border-radius:8px;white-space:nowrap}
.adbar-text{font-size:14.5px}
.adbar-text strong{color:var(--brand2)}
.adbar-close{background:none;border:0;color:#cdd9f0;font-size:24px;line-height:1;padding:8px 18px;cursor:pointer}
.adbar-close:hover{color:#fff}

/* float bar (right middle) */
.float-bar{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:65;display:flex;flex-direction:column;gap:12px}
.float-btn{width:56px;height:56px;border-radius:16px;border:0;background:var(--surface);color:var(--brand);box-shadow:0 10px 26px rgba(13,38,76,.18);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;cursor:pointer;font-size:11px;font-weight:600;transition:.18s}
.float-btn:hover{background:var(--brand);color:#fff;transform:scale(1.05)}
.float-btn span{font-size:11px}

/* wechat modal */
.wx-modal{position:fixed;inset:0;z-index:90;background:rgba(8,18,42,.55);display:none;align-items:center;justify-content:center;padding:20px}
.wx-modal.open{display:flex}
.wx-modal-box{background:#fff;border-radius:18px;padding:26px 26px 30px;max-width:340px;width:100%;text-align:center;position:relative;box-shadow:0 24px 60px rgba(8,18,42,.3)}
.wx-close{position:absolute;top:10px;right:14px;background:none;border:0;font-size:24px;color:var(--muted);cursor:pointer;line-height:1}
.wx-title{font-size:18px;font-weight:800;color:var(--ink);margin:0 0 14px}
.wx-img{width:220px;height:220px;object-fit:contain;margin:0 auto;border:1px solid var(--line);border-radius:12px}
.wx-tip{color:var(--muted);font-size:14px;margin:14px 0 0}

/* responsive */
@media(max-width:980px){
  .layer-grid,.cat-grid,.sol-grid,.sol-grid-full,.prod-grid{grid-template-columns:repeat(2,1fr)}
  .svc-grid,.svc-grid-full,.cap-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .detail-body-wrap{grid-template-columns:1fr}
  .toc-aside{display:none}
  .list-layout{grid-template-columns:1fr}
  .cat-side{position:static}
}
@media(max-width:680px){
  .nav-toggle{display:flex}
  .main-nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;padding:12px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .main-nav.open{display:flex}
  .main-nav a{padding:10px 0}
  .layer-grid,.cat-grid,.sol-grid,.sol-grid-full,.prod-grid,.svc-grid,.svc-grid-full,.cap-grid,.item-grid{grid-template-columns:1fr}
  .hero-inner{padding:70px 18px 60px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr}
  .float-bar{right:10px}
  .float-btn{width:50px;height:50px}
  .adbar-text{font-size:13px}
}