/* pg电子官网 - AI智能硬件 / Edge AI / Embedded AI 站点样式
   Embedded AI Lab + Edge Architecture + Device Engineering Console 视觉语言 */
:root{
  --bg:#f3f5f8;
  --bg-2:#e9edf2;
  --graphite:#141a23;
  --graphite-2:#1c2430;
  --graphite-3:#27313f;
  --ink:#1b222c;
  --ink-2:#48525f;
  --ink-3:#6c7684;
  --line:#d5dbe3;
  --line-dark:#33404f;
  --blue:#123f78;
  --blue-2:#1f5fa8;
  --cyan:#0f8fa8;
  --cyan-2:#5bc7d8;
  --violet:#5a4bc4;
  --violet-2:#8d7fe6;
  --amber:#d98a1a;
  --heat:#d9542b;
  --white:#ffffff;
  --radius:10px;
  --shadow:0 1px 2px rgba(20,26,35,.06),0 6px 20px rgba(20,26,35,.06);
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);font-size:16px;line-height:1.8;color:var(--ink);background:var(--bg);overflow-x:hidden}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue-2);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{line-height:1.35;margin:0 0 .6em;font-weight:700;color:var(--ink)}
h1{font-size:2rem}
h2{font-size:1.55rem}
h3{font-size:1.2rem}
h4{font-size:1.05rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.4em;margin:0 0 1em}
code,.mono{font-family:var(--mono);font-size:.9em}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.narrow{max-width:860px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:10px;top:10px;background:#fff;padding:6px 10px;z-index:999}

/* Header / Nav */
.site-header{background:var(--graphite);color:#dbe3ee;border-bottom:1px solid var(--line-dark);position:sticky;top:0;z-index:50}
.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:700;font-size:1.15rem;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand-mark{width:34px;height:34px;flex:none}
.brand small{display:block;font-size:.7rem;font-weight:400;color:#93a2b6;letter-spacing:.06em}
.nav-toggle{display:none;background:none;border:1px solid var(--line-dark);color:#fff;padding:8px 10px;border-radius:6px;font-size:.9rem;cursor:pointer}
.nav{display:flex;gap:2px;flex-wrap:wrap}
.nav a{color:#c7d2df;padding:8px 11px;border-radius:6px;font-size:.92rem;white-space:nowrap}
.nav a:hover,.nav a.active{background:var(--graphite-3);color:#fff;text-decoration:none}
.nav a.active{box-shadow:inset 0 -2px 0 var(--cyan-2)}

/* Hero */
.hero{background:linear-gradient(135deg,var(--graphite) 0%,var(--graphite-2) 55%,#1d2a3f 100%);color:#e6edf6;padding:56px 0 48px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:32px 32px;pointer-events:none}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero h1{color:#fff;font-size:2.1rem}
.hero .eyebrow{font-family:var(--mono);font-size:.78rem;color:var(--cyan-2);letter-spacing:.12em;text-transform:uppercase;margin-bottom:12px}
.hero p{color:#c3cfdd;font-size:1.02rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.btn{display:inline-block;padding:10px 18px;border-radius:7px;font-weight:600;font-size:.93rem;border:1px solid transparent}
.btn:hover{text-decoration:none}
.btn-primary{background:var(--cyan);color:#fff}
.btn-primary:hover{background:#0c7a90}
.btn-ghost{border-color:#4a5a6f;color:#e2e9f2}
.btn-ghost:hover{background:var(--graphite-3)}
.hero-figure figcaption{font-size:.8rem;color:#93a2b6;margin-top:8px;font-family:var(--mono)}
.page-hero{padding:44px 0 36px}
.page-hero .container{display:block}
.page-hero h1{font-size:1.9rem;max-width:900px}
.page-hero p{max-width:860px}
.breadcrumb{font-size:.82rem;color:#93a2b6;margin-bottom:10px;font-family:var(--mono)}
.breadcrumb a{color:#b9c6d6}

/* Sections */
.section{padding:52px 0}
.section-alt{background:var(--bg-2)}
.section-dark{background:var(--graphite-2);color:#d8e1ec}
.section-dark h2,.section-dark h3,.section-dark h4{color:#fff}
.section-dark p{color:#c3cfdd}
.section-head{margin-bottom:26px;max-width:860px}
.section-head .kicker{font-family:var(--mono);font-size:.76rem;letter-spacing:.12em;text-transform:uppercase;color:var(--cyan);margin-bottom:6px}
.section-dark .kicker{color:var(--cyan-2)}
.section-head p{color:var(--ink-2)}
.section-dark .section-head p{color:#b6c3d3}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{font-size:1.05rem}
.card .meta{font-family:var(--mono);font-size:.74rem;color:var(--ink-3);margin-bottom:8px}
.section-dark .card{background:var(--graphite-3);border-color:var(--line-dark);color:#d8e1ec}
.section-dark .card h3{color:#fff}
.section-dark .card .meta{color:#93a2b6}

/* Pipeline / Stack blocks */
.pipeline{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:14px 0 22px;font-family:var(--mono);font-size:.82rem}
.pipeline span{background:var(--white);border:1px solid var(--line);padding:6px 11px;border-radius:6px;color:var(--blue)}
.pipeline i{color:var(--ink-3);font-style:normal}
.section-dark .pipeline span{background:var(--graphite-3);border-color:var(--line-dark);color:var(--cyan-2)}
.pipeline.vertical{flex-direction:column;align-items:flex-start}
.stack-list{list-style:none;padding:0;margin:0;border-left:3px solid var(--cyan);}
.stack-list li{padding:8px 14px;border-bottom:1px dashed var(--line);display:flex;gap:12px;align-items:baseline}
.stack-list li:last-child{border-bottom:0}
.stack-list b{font-family:var(--mono);font-size:.8rem;color:var(--blue);min-width:150px}
.section-dark .stack-list li{border-color:var(--line-dark)}
.section-dark .stack-list b{color:var(--cyan-2)}

/* Long articles */
.article{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 32px;margin-bottom:26px;box-shadow:var(--shadow)}
.article header{margin-bottom:14px;border-bottom:1px solid var(--line);padding-bottom:12px}
.article .meta{font-family:var(--mono);font-size:.76rem;color:var(--ink-3);display:flex;flex-wrap:wrap;gap:14px;margin-bottom:8px}
.article .meta .cat{color:var(--violet);font-weight:700}
.article h2,.article h3{font-size:1.28rem}
.article h4{font-size:1.02rem;margin-top:1.2em;color:var(--blue)}
.article p{color:var(--ink);text-align:justify}
.article .verdict{border-left:4px solid var(--violet);background:#f4f2fc;padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;font-weight:600}
.article figure{margin:18px 0}
.article figcaption{font-size:.8rem;color:var(--ink-3);margin-top:6px}
.article .more{display:inline-block;margin-top:6px;font-weight:600}
.article .body-full{margin-top:8px}
.obs{border-left:4px solid var(--cyan)}
.demo-note{font-size:.78rem;color:var(--ink-3);font-family:var(--mono);margin-top:6px}

/* Trend list */
.trend-list{counter-reset:t;list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.trend-list li{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:18px 18px 18px 58px;position:relative}
.trend-list li::before{counter-increment:t;content:"0" counter(t);position:absolute;left:16px;top:16px;font-family:var(--mono);font-weight:700;color:var(--cyan);font-size:1.1rem}
.trend-list h3{font-size:1rem;margin-bottom:6px}
.trend-list p{margin:0;font-size:.94rem;color:var(--ink-2)}

/* Matrix / table */
.matrix{width:100%;border-collapse:collapse;font-size:.9rem;background:var(--white)}
.matrix th,.matrix td{border:1px solid var(--line);padding:9px 11px;text-align:left;vertical-align:top}
.matrix th{background:var(--bg-2);font-weight:700;font-family:var(--mono);font-size:.78rem}
.table-wrap{overflow-x:auto;border-radius:8px;border:1px solid var(--line)}
.section-dark .matrix{background:var(--graphite-3);color:#d8e1ec}
.section-dark .matrix th{background:var(--graphite);color:#fff}
.section-dark .matrix th,.section-dark .matrix td{border-color:var(--line-dark)}

/* Console demo */
.console{background:var(--graphite);color:#d8e1ec;border-radius:var(--radius);padding:20px;border:1px solid var(--line-dark);font-family:var(--mono);font-size:.84rem}
.console h3{color:#fff;font-family:var(--sans)}
.console label{display:block;margin:10px 0 4px;color:#93a2b6}
.console select,.console input[type=range]{width:100%}
.console select{background:var(--graphite-3);color:#fff;border:1px solid var(--line-dark);padding:6px;border-radius:5px;font-family:var(--mono)}
.meter{height:10px;background:#2c3745;border-radius:5px;overflow:hidden;margin:4px 0 8px}
.meter span{display:block;height:100%;background:var(--cyan);transition:width .3s}
.meter.power span{background:var(--amber)}
.meter.heat span{background:var(--heat)}
.meter.mem span{background:var(--violet-2)}
.console .readout{display:grid;grid-template-columns:repeat(2,1fr);gap:8px 16px;margin-top:8px}
.console .readout div{border-top:1px solid var(--line-dark);padding-top:6px}
.console .readout b{color:#fff;display:block;font-size:1.05rem}
.console .warn{color:#ffb38a;margin-top:8px;min-height:1.6em}
.tabs{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}
.tabs button{background:var(--graphite-3);color:#c7d2df;border:1px solid var(--line-dark);padding:6px 12px;border-radius:6px;cursor:pointer;font-family:var(--mono);font-size:.8rem}
.tabs button.active{background:var(--cyan);color:#fff;border-color:var(--cyan)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* FAQ */
.faq details{background:var(--white);border:1px solid var(--line);border-radius:8px;margin-bottom:10px;padding:0 18px}
.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style:none;position:relative;padding-right:26px}
.faq summary::after{content:"+";position:absolute;right:0;top:12px;color:var(--cyan);font-family:var(--mono);font-size:1.2rem}
.faq details[open] summary::after{content:"−"}
.faq details p{padding-bottom:14px;color:var(--ink-2);margin:0}

/* Feature list for app */
.feature-list{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.feature-list .card{padding:18px}
.feature-list .num{font-family:var(--mono);color:var(--cyan);font-size:.78rem}
.download-box{background:var(--white);border:1px dashed var(--blue-2);border-radius:var(--radius);padding:24px}
.download-box .platforms{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:14px}
.download-box .platforms div{border:1px solid var(--line);border-radius:8px;padding:14px;background:var(--bg)}
.download-box .platforms b{display:block;margin-bottom:6px}
.status{display:inline-block;font-family:var(--mono);font-size:.74rem;padding:2px 8px;border-radius:4px;background:#fff3e0;color:#9a5b00;border:1px solid #f1d4a5}

/* Device map */
.device-map{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.device-map .card{padding:16px 18px}
.device-map .card h3{font-size:.98rem;margin-bottom:6px}
.device-map .card p{font-size:.9rem;color:var(--ink-2);margin:0}
.device-map .tag{font-family:var(--mono);font-size:.72rem;color:var(--cyan)}

/* Summary lists (回流) */
.digest{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.digest .card p{font-size:.94rem;color:var(--ink-2)}
.digest .card a.more{font-weight:600;font-size:.9rem}

/* Notice */
.notice{background:var(--white);border:1px solid var(--line);border-left:4px solid var(--amber);border-radius:8px;padding:14px 18px;font-size:.9rem;color:var(--ink-2);margin-top:22px}
.notice.third{border-left-color:var(--violet)}

/* Footer */
.site-footer{background:var(--graphite);color:#a9b7c8;padding:40px 0 28px;font-size:.88rem;border-top:1px solid var(--line-dark)}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:28px;margin-bottom:22px}
.site-footer h4{color:#fff;font-size:.95rem}
.site-footer a{color:#c7d2df}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:6px}
.site-footer .legal{border-top:1px solid var(--line-dark);padding-top:16px;font-family:var(--mono);font-size:.78rem;line-height:1.9}
.site-footer .legal b{color:#fff}

/* Responsive */
@media (max-width:1024px){
  .hero .container{grid-template-columns:1fr}
  .grid-4,.feature-list{grid-template-columns:repeat(2,1fr)}
  .grid-3,.digest,.device-map{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .nav-toggle{display:block}
  .nav{display:none;width:100%;flex-direction:column;padding-bottom:10px}
  .nav.open{display:flex}
  .nav-wrap{flex-wrap:wrap}
  .hero{padding:36px 0}
  .hero h1{font-size:1.55rem}
  .page-hero h1{font-size:1.45rem}
  h2{font-size:1.32rem}
  .grid-2,.grid-3,.grid-4,.digest,.device-map,.feature-list,.trend-list{grid-template-columns:1fr}
  .article{padding:20px 18px}
  .article p{text-align:left}
  .site-footer .cols{grid-template-columns:1fr}
  .download-box .platforms{grid-template-columns:1fr}
  .console .readout{grid-template-columns:1fr}
  .stack-list b{min-width:110px}
  .section{padding:36px 0}
}
@media (max-width:430px){
  body{font-size:15px}
  .pipeline{flex-direction:column;align-items:flex-start}
  .pipeline i{transform:rotate(90deg)}
}