/* pg电子官网 - AI数字孪生电子设备 / Predictive Maintenance / Equipment Intelligence */
:root{
  --bg:#0b0f14;
  --bg2:#0e1520;
  --panel:#121a24;
  --panel2:#17212d;
  --line:#243040;
  --line2:#32425a;
  --text:#e6ebf2;
  --muted:#98a4b8;
  --dim:#647089;
  --twin:#33c4c4;
  --twin-deep:#1f9d9d;
  --actual:#4a8cf0;
  --predicted:#8d7cf5;
  --simulated:#c9a13b;
  --warning:#e2934a;
  --failure:#e2585a;
  --health:#48b087;
  --radius:14px;
  --shadow:0 12px 40px rgba(0,0,0,.35);
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.85;overflow-x:hidden}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--twin);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;font-weight:700;letter-spacing:.01em}
h1{font-size:2rem}
h2{font-size:1.55rem}
h3{font-size:1.18rem}
h4{font-size:1.02rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.4em;margin:0 0 1em}
li{margin-bottom:.35em}
strong{color:#fff}
code,.mono{font-family:var(--mono);font-size:.9em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0;border-top:1px solid rgba(36,48,64,.6)}
.section.tight{padding:38px 0}
.eyebrow{display:inline-block;font-size:.78rem;letter-spacing:.12em;color:var(--twin);margin-bottom:8px;font-weight:600;text-transform:uppercase}
.eyebrow.blue{color:var(--actual)}
.eyebrow.purple{color:var(--predicted)}
.eyebrow.gold{color:var(--simulated)}
.eyebrow.orange{color:var(--warning)}
.section-head{max-width:860px;margin-bottom:32px}
.section-head p{color:var(--muted)}
.muted{color:var(--muted)}
.dim{color:var(--dim)}
.small{font-size:.9rem}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,15,20,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:1.18rem;letter-spacing:.03em}
.brand:hover{text-decoration:none}
.brand-mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--twin),var(--actual));position:relative;flex:none}
.brand-mark::after{content:"";position:absolute;inset:7px;border:2px solid #fff;border-radius:4px;opacity:.92;transform:rotate(45deg)}
.brand small{display:block;font-size:.62rem;font-weight:500;color:var(--muted);letter-spacing:.09em;line-height:1;white-space:nowrap}
.site-nav{display:flex;gap:3px;flex-wrap:wrap}
.site-nav a{color:var(--muted);padding:8px 8px;border-radius:8px;font-size:.86rem;white-space:nowrap}
.site-nav a:hover,.site-nav a.active{color:#fff;background:var(--panel2);text-decoration:none}
.nav-toggle{display:none;background:var(--panel2);border:1px solid var(--line2);color:#fff;border-radius:8px;width:42px;height:38px;font-size:1.2rem;cursor:pointer}

/* Hero */
.hero{padding:60px 0 46px;background:radial-gradient(1200px 500px at 15% -10%,rgba(51,196,196,.16),transparent 60%),radial-gradient(800px 400px at 92% 8%,rgba(141,124,245,.14),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:40px;align-items:center}
.hero h1{font-size:2.05rem;margin-bottom:14px}
.hero .lead{font-size:1.05rem;color:var(--muted)}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 22px}
.tag{font-size:.77rem;padding:4px 10px;border-radius:999px;border:1px solid var(--line2);color:var(--muted);background:rgba(23,33,45,.6)}
.tag.twin{border-color:rgba(51,196,196,.5);color:var(--twin)}
.tag.blue{border-color:rgba(74,140,240,.5);color:var(--actual)}
.tag.purple{border-color:rgba(141,124,245,.5);color:var(--predicted)}
.tag.gold{border-color:rgba(201,161,59,.55);color:var(--simulated)}
.tag.orange{border-color:rgba(226,147,74,.5);color:var(--warning)}
.btn{display:inline-block;padding:11px 20px;border-radius:10px;font-weight:600;border:1px solid transparent;font-size:.94rem}
.btn.primary{background:var(--twin-deep);color:#fff}
.btn.primary:hover{background:var(--twin);color:#08201f;text-decoration:none}
.btn.ghost{border-color:var(--line2);color:var(--text);background:rgba(23,33,45,.5)}
.btn.ghost:hover{border-color:var(--twin);text-decoration:none}
.btn-row{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;box-shadow:var(--shadow)}
.page-hero{padding:52px 0 38px;background:radial-gradient(900px 400px at 8% -10%,rgba(51,196,196,.16),transparent 60%)}
.page-hero .lead{max-width:860px;color:var(--muted);font-size:1.02rem}
.breadcrumb{font-size:.84rem;color:var(--dim);margin-bottom:12px}
.breadcrumb a{color:var(--muted)}

/* Panels & grids */
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.panel.twin{border-color:rgba(51,196,196,.4)}
.panel.blue{border-color:rgba(74,140,240,.4)}
.panel.purple{border-color:rgba(141,124,245,.4)}
.panel.gold{border-color:rgba(201,161,59,.4)}
.panel.orange{border-color:rgba(226,147,74,.4)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.engine-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.engine-icon{width:40px;height:40px;border-radius:10px;display:grid;place-items:center;font-weight:800;font-size:.78rem;letter-spacing:.04em;flex:none}
.engine-icon.twin{background:rgba(51,196,196,.15);color:var(--twin);border:1px solid rgba(51,196,196,.5)}
.engine-icon.blue{background:rgba(74,140,240,.15);color:var(--actual);border:1px solid rgba(74,140,240,.5)}
.engine-icon.purple{background:rgba(141,124,245,.15);color:var(--predicted);border:1px solid rgba(141,124,245,.5)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 14px;font-size:.92rem}
.kv dt{color:var(--dim);font-family:var(--mono);font-size:.78rem;padding-top:3px}
.kv dd{margin:0;color:var(--text)}

/* Flow / loop */
.flow{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:14px 0 18px}
.flow span{background:var(--panel2);border:1px solid var(--line2);padding:6px 12px;border-radius:8px;font-size:.86rem;font-family:var(--mono)}
.flow i{color:var(--dim);font-style:normal}
.flow.vertical{flex-direction:column;align-items:flex-start}
.flow span.twin{border-color:var(--twin);color:var(--twin)}
.flow span.blue{border-color:var(--actual);color:var(--actual)}
.flow span.purple{border-color:var(--predicted);color:var(--predicted)}
.flow span.gold{border-color:var(--simulated);color:var(--simulated)}
.flow span.orange{border-color:var(--warning);color:var(--warning)}
.flow span.red{border-color:var(--failure);color:var(--failure)}
.loop-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center}
.steps{list-style:none;padding:0;margin:0;counter-reset:s}
.steps li{position:relative;padding:10px 0 10px 44px;border-left:1px dashed var(--line2);margin-left:14px;counter-increment:s}
.steps li::before{content:counter(s);position:absolute;left:-15px;top:12px;width:28px;height:28px;border-radius:50%;background:var(--panel2);border:1px solid var(--twin-deep);display:grid;place-items:center;font-size:.8rem;color:#fff;font-family:var(--mono)}
.steps b{display:block;color:#fff}

/* Articles */
.article{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:32px;margin-bottom:28px}
.article .meta{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:.81rem;color:var(--dim);font-family:var(--mono);margin-bottom:10px}
.article .meta .cat{color:var(--twin)}
.article .meta .cat.blue{color:var(--actual)}
.article .meta .cat.purple{color:var(--predicted)}
.article .meta .cat.gold{color:var(--simulated)}
.article .meta .cat.orange{color:var(--warning)}
.article h3{font-size:1.3rem;margin-bottom:16px;color:#fff}
.article h4{margin-top:22px;color:#fff}
.article p{color:#cfd6e3}
.article figure{margin:20px 0;background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:12px}
.article figcaption{font-size:.81rem;color:var(--dim);margin-top:8px;text-align:center}
.callout{border-left:3px solid var(--twin-deep);background:rgba(51,196,196,.08);padding:14px 18px;border-radius:0 10px 10px 0;margin:18px 0;color:#fff;font-weight:600}
.callout.blue{border-color:var(--actual);background:rgba(74,140,240,.08)}
.callout.purple{border-color:var(--predicted);background:rgba(141,124,245,.08)}
.callout.gold{border-color:var(--simulated);background:rgba(201,161,59,.08)}
.callout.orange{border-color:var(--warning);background:rgba(226,147,74,.08)}
.fail{background:rgba(226,88,90,.07);border:1px solid rgba(226,88,90,.3);border-radius:10px;padding:14px 18px;margin:16px 0}
.fail h5{margin:0 0 6px;color:var(--failure);font-size:.88rem;letter-spacing:.06em}
.fail ul{margin:0}
.fail li{color:#dadfec;font-size:.93rem}
.readmore{display:inline-block;margin-top:8px;font-weight:600}
.readmore::after{content:" \203A";}
.article-list .article{margin-bottom:22px}
.summary-article{padding:26px}
.summary-article h3{font-size:1.14rem}

/* Trends */
.trend-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.trend{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 22px;position:relative}
.trend .num{font-family:var(--mono);color:var(--twin);font-size:.79rem;letter-spacing:.1em}
.trend h3{font-size:1.01rem;margin:6px 0 8px;color:#fff}
.trend p{font-size:.92rem;color:var(--muted);margin:0}
.trend .src{display:inline-block;margin-top:8px;font-size:.74rem;padding:2px 8px;border-radius:6px;border:1px solid var(--line2);color:var(--dim)}
.src.commercial{border-color:var(--health);color:var(--health)}
.src.research{border-color:var(--predicted);color:var(--predicted)}
.src.standard{border-color:var(--actual);color:var(--actual)}

/* Observations */
.observe{border-left:3px solid var(--simulated);padding:8px 0 8px 22px;margin-bottom:34px}
.observe h3{color:#fff;font-size:1.14rem}
.observe p{color:#cfd6e3}

/* Capability map */
.cap-map{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;position:relative}
.cap-tier{background:linear-gradient(180deg,rgba(51,196,196,.08),transparent);border:1px solid rgba(51,196,196,.32);border-radius:12px;padding:20px}
.cap-tier.blue{background:linear-gradient(180deg,rgba(74,140,240,.08),transparent);border-color:rgba(74,140,240,.32)}
.cap-tier.purple{background:linear-gradient(180deg,rgba(141,124,245,.08),transparent);border-color:rgba(141,124,245,.32)}
.cap-tier .lvl{font-family:var(--mono);font-size:.74rem;color:var(--twin);letter-spacing:.12em}
.cap-tier.blue .lvl{color:var(--actual)}
.cap-tier.purple .lvl{color:var(--predicted)}
.cap-tier h3{margin:6px 0 8px;color:#fff;font-size:1.03rem}
.cap-tier ul{margin:0;padding-left:1.1em;font-size:.91rem;color:var(--muted)}

/* State console (Current / Historical / Predicted / Simulated) */
.state-console{background:var(--bg2);border:1px solid var(--line);border-radius:var(--radius);padding:20px;font-family:var(--mono)}
.state-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.state-tabs button{background:var(--panel2);border:1px solid var(--line2);color:var(--muted);border-radius:8px;padding:6px 12px;cursor:pointer;font-family:var(--mono);font-size:.81rem}
.state-tabs button.on{border-color:var(--predicted);color:#fff;background:rgba(141,124,245,.15)}
.state-body{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 20px;font-size:.85rem}
.state-body div{display:flex;justify-content:space-between;gap:12px;border-bottom:1px dashed var(--line);padding:5px 0}
.state-body span:first-child{color:var(--dim)}
.state-body span:last-child{color:var(--text);text-align:right}
.state-body .flag span:last-child{color:var(--warning)}
.state-note{font-size:.78rem;color:var(--dim);margin-top:12px;font-family:var(--font)}
.state-title{color:#fff;font-family:var(--font);font-weight:700;margin-bottom:10px;display:block}

/* Node / dependency graph */
.node-graph{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;align-items:start}
.gnode{background:var(--panel);border:1px solid rgba(74,140,240,.4);border-radius:10px;padding:12px 14px;font-size:.87rem;cursor:pointer;transition:border-color .2s,transform .2s}
.gnode:hover,.gnode.on{border-color:var(--actual);transform:translateY(-2px)}
.gnode .gid{font-family:var(--mono);font-size:.71rem;color:var(--actual)}
.gnode b{display:block;color:#fff;margin:2px 0 4px}
.gnode small{color:var(--muted);display:block}
.gnode.risk{border-color:rgba(226,88,90,.5)}
.gnode.risk .gid{color:var(--failure)}
.gnode.ok{border-color:rgba(72,176,135,.5)}
.gnode.ok .gid{color:var(--health)}
.gdetail{margin-top:14px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:.91rem;min-height:56px}

/* Timeline */
.timeline{list-style:none;padding:0;margin:0;border-left:2px solid var(--line2);margin-left:10px}
.timeline li{position:relative;padding:0 0 20px 24px}
.timeline li::before{content:"";position:absolute;left:-7px;top:9px;width:12px;height:12px;border-radius:50%;background:var(--warning);box-shadow:0 0 0 4px rgba(226,147,74,.18)}
.timeline li.fault::before{background:var(--failure);box-shadow:0 0 0 4px rgba(226,88,90,.18)}
.timeline li.event::before{background:var(--predicted);box-shadow:0 0 0 4px rgba(141,124,245,.18)}
.timeline li.state::before{background:var(--twin);box-shadow:0 0 0 4px rgba(51,196,196,.18)}
.timeline b{color:#fff}
.timeline .t{font-family:var(--mono);font-size:.74rem;color:var(--dim)}

/* Demo (generic interactive block) */
.demo{background:var(--bg2);border:1px solid rgba(51,196,196,.3);border-radius:var(--radius);padding:22px}
.demo-controls{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.demo-controls button,.ctl{background:var(--panel2);border:1px solid var(--line2);color:var(--text);padding:8px 14px;border-radius:8px;cursor:pointer;font-size:.89rem;font-family:var(--font)}
.demo-controls button:hover{border-color:var(--twin)}
.demo-controls button.on{border-color:var(--twin);color:#fff;background:rgba(51,196,196,.15)}
.demo-out{font-family:var(--mono);font-size:.87rem;background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:12px 14px;min-height:60px;white-space:pre-wrap}
.demo-out .k{color:var(--twin)}
.demo-out .w{color:var(--warning)}
.demo-out .r{color:var(--failure)}
.notice{font-size:.79rem;color:var(--dim);border-top:1px dashed var(--line);padding-top:10px;margin-top:12px}
.range-wrap{display:flex;align-items:center;gap:12px;margin:10px 0}
.range-wrap input{flex:1}
.confidence-bar{height:10px;border-radius:6px;background:var(--panel2);border:1px solid var(--line2);position:relative;overflow:hidden;margin:10px 0}
.confidence-bar .fill{position:absolute;left:0;top:0;bottom:0;background:linear-gradient(90deg,var(--predicted),var(--simulated));border-radius:6px 0 0 6px}
.compare-cols{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:12px 0}
.compare-cols .col{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:.9rem}
.compare-cols .col h5{margin:0 0 8px;font-size:.8rem;letter-spacing:.06em;color:var(--dim)}
.compare-cols .col.bad{border-color:rgba(226,88,90,.4)}
.compare-cols .col.bad h5{color:var(--failure)}
.compare-cols .col.good{border-color:rgba(72,176,135,.4)}
.compare-cols .col.good h5{color:var(--health)}

/* Tables */
.table-wrap{overflow-x:auto;margin:16px 0}
table{width:100%;border-collapse:collapse;font-size:.91rem;min-width:560px}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--panel2);color:#fff;font-weight:600}
td{color:#cfd6e3}

/* QA lists */
.qa-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.qa{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.qa h3,.qa h4{font-size:.99rem;color:#fff;margin-bottom:6px}
.qa p{font-size:.92rem;color:var(--muted);margin:0}
.qa-list .qa{margin-bottom:12px}

/* Latest */
.latest{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.latest .card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px;display:flex;flex-direction:column}
.latest .card h3{font-size:.99rem;color:#fff}
.latest .card p{font-size:.91rem;color:var(--muted);flex:1}
.latest.two{grid-template-columns:repeat(2,1fr)}
.latest .card .tag-row{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}

/* FAQ */
.faq details{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:0 18px;margin-bottom:10px}
.faq summary{cursor:pointer;padding:14px 0;font-weight:600;color:#fff;list-style:none;position:relative;padding-right:28px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:2px;top:12px;color:var(--twin);font-size:1.2rem}
.faq details[open] summary::after{content:"\2212"}
.faq details p{color:var(--muted);padding-bottom:14px;margin:0}

/* Feature list */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.feature{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px}
.feature .n{font-family:var(--mono);color:var(--twin);font-size:.74rem}
.feature h3{font-size:.99rem;color:#fff;margin:4px 0 6px}
.feature p{font-size:.89rem;color:var(--muted);margin:0}
.download-box{background:linear-gradient(135deg,rgba(51,196,196,.14),rgba(141,124,245,.08));border:1px solid var(--line2);border-radius:var(--radius);padding:28px}
.download-box .chan{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:16px 0}
.download-box .chan div{background:rgba(11,15,20,.6);border:1px solid var(--line);border-radius:10px;padding:14px;font-size:.91rem}
.download-box .chan b{display:block;color:#fff;margin-bottom:4px}

/* Links list */
.link-list{display:flex;flex-wrap:wrap;gap:10px}
.link-list a{background:var(--panel2);border:1px solid var(--line2);padding:8px 14px;border-radius:8px;color:var(--text);font-size:.89rem}
.link-list a:hover{border-color:var(--twin);text-decoration:none;color:#fff}

/* Footer */
.site-footer{border-top:1px solid var(--line);padding:40px 0 30px;background:var(--bg2);font-size:.87rem;color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:28px;margin-bottom:22px}
.site-footer h4{color:#fff;font-size:.94rem}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:6px}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:#fff}
.legal{border-top:1px dashed var(--line);padding-top:16px;font-size:.79rem;color:var(--dim)}
.legal p{margin-bottom:8px}
.icp{color:var(--muted)}

/* Badges for Observed/Estimated/Predicted/Simulated */
.state-badge{display:inline-block;font-family:var(--mono);font-size:.72rem;padding:2px 8px;border-radius:6px;border:1px solid var(--line2);margin-right:6px}
.state-badge.observed{border-color:var(--actual);color:var(--actual)}
.state-badge.estimated{border-color:var(--twin);color:var(--twin)}
.state-badge.predicted{border-color:var(--predicted);color:var(--predicted)}
.state-badge.simulated{border-color:var(--simulated);color:var(--simulated);border-style:dashed}

/* Reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}}

/* Responsive */
@media (max-width:1024px){
  .hero-grid,.loop-grid{grid-template-columns:1fr}
  .grid-4,.feature-grid{grid-template-columns:repeat(2,1fr)}
  .latest{grid-template-columns:repeat(2,1fr)}
  .node-graph{grid-template-columns:repeat(2,1fr)}
  .nav-toggle{display:block}
  .site-nav{display:none;position:absolute;left:0;right:0;top:64px;background:var(--bg2);border-bottom:1px solid var(--line);flex-direction:column;padding:10px 16px 16px}
  .site-nav.open{display:flex}
  .site-nav a{padding:10px 8px;font-size:1rem}
}
@media (max-width:768px){
  body{font-size:15px}
  h1,.hero h1{font-size:1.55rem}
  h2{font-size:1.3rem}
  .section{padding:42px 0}
  .grid-2,.grid-3,.trend-grid,.cap-map,.qa-grid,.latest,.latest.two,.footer-grid,.state-body,.download-box .chan,.compare-cols{grid-template-columns:1fr}
  .node-graph{grid-template-columns:1fr}
  .article{padding:20px}
}
@media (max-width:430px){
  .grid-4,.feature-grid{grid-template-columns:1fr}
  .container{padding:0 14px}
  .article{padding:16px}
  .btn{width:100%;text-align:center}
}