:root{
  --bg:#0A0F1A;
  --surface:#111A2B;
  --surface-2:#0F1827;
  --primary:#2BD4FF;
  --accent:#FF7A2F;
  --line:#26384F;
  --line-strong:#32465f;
  --text:#E6EDF6;
  --muted:#93A4BC;
  --h2-inset:24px;
  --header-h:64px;
  --radius:12px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.75;
  padding-top:var(--header-h);
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}
h1,h2,h3,h4{line-height:1.35;font-weight:700;color:#fff;}
p{margin:0 0 14px;}

/* ===== Header ===== */
.pwr-header{
  position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:50;
  background:rgba(10,15,26,0.92);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.pwr-header-inner{
  max-width:1200px;margin:0 auto;height:100%;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;
}
.pwr-logo{font-weight:800;font-size:18px;letter-spacing:.3px;color:#fff;white-space:nowrap;}
.pwr-logo:hover{text-decoration:none;color:var(--primary);}
.pwr-nav-toggle{
  display:none;background:none;border:1px solid var(--line);color:#fff;
  font-size:22px;line-height:1;width:42px;height:38px;border-radius:8px;cursor:pointer;
}
.pwr-nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.pwr-nav-list>li>a{
  display:block;padding:8px 12px;color:var(--text);border-radius:8px;font-size:15px;
}
.pwr-nav-list>li>a:hover{background:var(--surface);text-decoration:none;color:var(--primary);}
.pwr-nav-item{position:relative;}
/* 悬停展开的子菜单：默认隐藏，鼠标移开即收起 */
.pwr-nav-sub{display:none;position:absolute;top:100%;left:0;min-width:200px;background:var(--surface);
  border:1px solid var(--line);border-radius:10px;padding:8px 0;margin-top:8px;list-style:none;z-index:60;
  box-shadow:0 16px 34px rgba(0,0,0,.5);
}
.pwr-nav-sub::before{content:"";position:absolute;top:-10px;left:0;right:0;height:10px;} /* 隐形悬停桥，避免移入时闪断 */
.pwr-nav-item:hover>.pwr-nav-sub,.pwr-nav-item:focus-within>.pwr-nav-sub{display:block;}
.pwr-nav-sub li>a{display:block;padding:8px 16px;color:var(--text);font-size:14px;white-space:nowrap;}
.pwr-nav-sub li>a:hover{background:var(--surface-2);color:var(--primary);text-decoration:none;}

/* ===== Breadcrumb ===== */
.pwr-breadcrumb{padding:16px 0 8px;font-size:13px;color:var(--muted);}
.pwr-breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;margin:0;padding:0;}
.pwr-breadcrumb li{display:flex;align-items:center;}
.pwr-breadcrumb li::after{content:"›";margin:0 7px;color:var(--line-strong);}
.pwr-breadcrumb li:last-child::after{content:"";margin:0;}
.pwr-breadcrumb a{color:var(--muted);}
.pwr-breadcrumb a:hover{color:var(--primary);}

/* ===== Detail layout ===== */
.pwr-article-layout,.pwr-product-layout{max-width:1200px;margin:0 auto;padding:0 var(--h2-inset);}
.pwr-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start;margin-top:6px;}
.pwr-content-main{min-width:0;}
.pwr-toc-aside{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;}
.pwr-toc-panel,.pwr-cat-panel{border:1px solid var(--line);border-radius:10px;background:var(--surface);}
.pwr-toc-panel summary,.pwr-cat-panel summary{cursor:pointer;padding:12px 16px;font-weight:600;color:#fff;list-style:none;}
.pwr-toc-panel summary::-webkit-details-marker,.pwr-cat-panel summary::-webkit-details-marker{display:none;}
.pwr-toc-panel summary::after,.pwr-cat-panel summary::after{content:"▾";float:right;color:var(--muted);}
.pwr-toc-panel[open] summary::after,.pwr-cat-panel[open] summary::after{content:"▴";}
.pwr-toc-panel ol,.pwr-cat-panel ul{list-style:none;margin:0;padding:0 16px 12px;}
.pwr-toc-panel li,.pwr-cat-panel li{margin:7px 0;font-size:14px;}
.pwr-toc-panel a{color:var(--muted);}
.pwr-toc-panel a:hover{color:var(--primary);}
.pwr-category-list{margin:0;padding:0 16px 12px;list-style:none;}
.pwr-category-list li{margin:7px 0;font-size:14px;}
.pwr-category-list a{color:var(--muted);}
.pwr-category-list a:hover,.pwr-category-list li.active a{color:var(--primary);}
.pwr-category-list li.active a{font-weight:600;}

/* ===== Content typography ===== */
.pwr-content-main h1{font-size:30px;margin:4px 0 14px;color:#fff;}
.pwr-content-main h2{font-size:22px;margin:30px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--line);color:#fff;scroll-margin-top:80px;}
.pwr-content-main h3{font-size:18px;margin:22px 0 10px;color:#fff;scroll-margin-top:80px;}
.pwr-content-main p{color:var(--text);}
.pwr-content-main ul,.pwr-content-main ol{padding-left:22px;margin:0 0 14px;}
.pwr-content-main li{margin:6px 0;color:var(--text);}
.pwr-keywords{color:var(--muted);font-size:14px;margin-bottom:10px;}
.pwr-keywords strong{color:var(--primary);font-weight:600;}
.pwr-time{display:inline-block;color:var(--muted);font-size:13px;margin-bottom:18px;
  border:1px solid var(--line);border-radius:999px;padding:3px 12px;}
.pwr-summary{background:var(--surface);border-left:3px solid var(--primary);border-radius:8px;
  padding:14px 18px;margin:0 0 18px;color:var(--text);}
.pwr-conclusion{border:1px solid var(--line);border-radius:10px;background:var(--surface-2);
  padding:14px 18px;margin:18px 0;}
.pwr-conclusion p{margin:0 0 8px;color:var(--text);}
.pwr-conclusion strong{color:var(--accent);}
.pwr-content-main blockquote{margin:16px 0;padding:12px 16px;border-left:3px solid var(--accent);
  background:var(--surface);border-radius:0 8px 8px 0;color:var(--muted);}

/* ===== 文章结构化组件 ===== */
.pwr-abstract{background:linear-gradient(180deg,rgba(43,212,255,.10),rgba(43,212,255,.02));
  border:1px solid rgba(43,212,255,.30);border-radius:12px;padding:16px 20px;margin:0 0 16px;
  color:var(--text);line-height:1.8;}
.pwr-abstract strong{color:var(--primary);}
.pwr-meta{color:var(--muted);font-size:14px;margin:0 0 18px;}
.pwr-meta strong{color:var(--primary);font-weight:600;}
.pwr-meta time{display:inline-block;color:var(--muted);font-size:13px;
  border:1px solid var(--line);border-radius:999px;padding:2px 10px;margin-left:6px;}
.pwr-takeaway{background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:16px 20px;margin:0 0 24px;}
.pwr-takeaway h3{margin:0 0 12px;font-size:16px;color:var(--primary);border:none;padding:0;}
.pwr-takeaway ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 18px;}
.pwr-takeaway li{position:relative;padding-left:16px;color:var(--text);font-size:14px;margin:0;}
.pwr-takeaway li::before{content:"▹";position:absolute;left:0;color:var(--accent);}
.pwr-callout{border-radius:10px;padding:14px 18px;margin:18px 0;}
.pwr-callout strong{display:block;margin-bottom:6px;color:var(--accent);}
.pwr-callout-warn{background:rgba(255,122,47,.08);border:1px solid rgba(255,122,47,.35);}
.pwr-callout-note{background:rgba(43,212,255,.08);border:1px solid rgba(43,212,255,.30);}
.pwr-related{margin-top:30px;padding-top:22px;border-top:1px solid var(--line);}
.pwr-related h2{font-size:18px;margin-bottom:14px;}
.pwr-related ul{list-style:none;margin:0;padding:0;display:grid;gap:10px;}
.pwr-related li{background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:12px 16px;color:var(--muted);font-size:14px;}
.pwr-related li a{color:var(--primary);font-weight:600;}
.pwr-related li a:hover{text-decoration:underline;}

/* tables: cover all body tables incl. markdown bare <table> */
.pwr-content-main table,.pwr-page-card table,table.pwr-spec{
  width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;
}
.pwr-content-main table th,.pwr-page-card table th,table.pwr-spec th{
  background:#1B2D49;color:#E6EDF6;border:1px solid var(--line-strong);padding:9px 12px;text-align:left;font-weight:600;
}
.pwr-content-main table td,.pwr-page-card table td,table.pwr-spec td{
  border:1px solid var(--line-strong);padding:9px 12px;color:var(--text);vertical-align:top;
}
.pwr-content-main table tr:nth-child(even) td,.pwr-page-card table tr:nth-child(even) td,table.pwr-spec tr:nth-child(even) td{
  background:var(--surface-2);
}

/* FAQ */
.pwr-faq{margin:22px 0;}
.pwr-faq-item{border:1px solid var(--line);border-radius:10px;margin:10px 0;background:var(--surface);overflow:hidden;}
.pwr-faq-item summary{cursor:pointer;padding:13px 16px;font-weight:600;color:#fff;list-style:none;}
.pwr-faq-item summary::-webkit-details-marker{display:none;}
.pwr-faq-item summary::before{content:"Q";display:inline-block;margin-right:8px;color:var(--accent);font-weight:800;}
.pwr-faq-item[open] summary{border-bottom:1px solid var(--line);}
.pwr-faq-a{padding:13px 16px;color:var(--text);}
.pwr-faq-a::before{content:"A";display:inline-block;margin-right:8px;color:var(--primary);font-weight:800;}

/* related */
.pwr-related{margin:24px 0;border-top:1px solid var(--line);padding-top:16px;}
.pwr-related h2{font-size:18px;border:none;margin:0 0 12px;padding:0;}
.pwr-related ul{list-style:none;padding:0;margin:0;}
.pwr-related li{margin:8px 0;padding-left:16px;position:relative;}
.pwr-related li::before{content:"→";position:absolute;left:0;color:var(--primary);}

/* ===== List layout ===== */
.pwr-list-layout{max-width:1200px;margin:0 auto;padding:0 var(--h2-inset);}
.pwr-list-title{font-size:28px;margin:8px 0 6px;color:#fff;}
.pwr-cat-intro{color:var(--muted);margin-bottom:18px;max-width:760px;}
.pwr-list-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:32px;align-items:start;margin-bottom:40px;}
.pwr-cat-side{position:sticky;top:80px;}
.pwr-cat-content{min-width:0;}
.pwr-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px;}
.pwr-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;transition:border-color .2s,transform .2s;}
.pwr-card:hover{border-color:var(--primary);transform:translateY(-2px);}
.pwr-card-title{font-size:17px;margin:0 0 8px;line-height:1.4;}
.pwr-card-title a{color:#fff;}
.pwr-card-title a:hover{color:var(--primary);}
.pwr-card-desc{color:var(--muted);font-size:14px;margin:0 0 8px;}
.pwr-card-meta{color:var(--line-strong);font-size:12px;margin:0;}

/* ===== Page ===== */
.pwr-page-wrap{max-width:920px;margin:0 auto;padding:0 var(--h2-inset);}
.pwr-page-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 34px;margin-bottom:40px;}
.pwr-page-h1{font-size:30px;margin:6px 0 10px;color:#fff;}
.pwr-page-lead{color:var(--muted);margin-bottom:18px;}
.pwr-page-card h2{font-size:21px;margin:26px 0 10px;color:#fff;border-bottom:1px solid var(--line);padding-bottom:6px;}
.pwr-page-card h3{font-size:17px;margin:18px 0 8px;color:#fff;}
.pwr-archive-h2{font-size:22px;margin:26px 0 10px;color:#fff;}
.pwr-archive-group{margin:0 0 16px;}
.pwr-archive-cat{font-size:16px;margin:0 0 6px;color:var(--primary);}
.pwr-archive-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:6px 24px;}
.pwr-archive-list li{padding:4px 0;border-bottom:1px dashed var(--line);}
.pwr-archive-list a{color:var(--text);}

/* ===== Float capsule ===== */
.pwr-float{position:fixed;right:22px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.pwr-float-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  width:54px;height:54px;border-radius:27px;border:none;cursor:pointer;
  background:linear-gradient(160deg,var(--primary),#0b6f8f);color:#04121a;font-weight:700;
  box-shadow:0 6px 18px rgba(43,212,255,.28);text-decoration:none;}
.pwr-float-btn:nth-child(2){background:linear-gradient(160deg,var(--accent),#a8430f);color:#fff;}
.pwr-float-btn:nth-child(3){background:linear-gradient(160deg,#3a7bff,#16306b);color:#fff;}
.pwr-float-btn:hover{text-decoration:none;transform:scale(1.06);}
.pwr-float-ico{font-size:18px;line-height:1;}
.pwr-float-txt{font-size:11px;font-weight:600;}
.pwr-card-overlay{position:fixed;inset:0;background:rgba(4,8,16,.78);z-index:70;display:flex;align-items:center;justify-content:center;}
.pwr-card-overlay[hidden]{display:none;}
.pwr-card-box{position:relative;background:#fff;padding:8px;border-radius:8px;}
.pwr-card-img{display:block;width:300px;height:500px;object-fit:contain;}
.pwr-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;
  border:none;background:#fff;color:#04121a;font-size:22px;cursor:pointer;box-shadow:0 2px 8px rgba(0,0,0,.4);}

/* ===== Footer ===== */
.pwr-footer{background:var(--surface-2);border-top:1px solid var(--line);margin-top:50px;}
.pwr-footer-inner{max-width:1200px;margin:0 auto;padding:36px 24px 20px;}
.pwr-footer-cols{display:grid;grid-template-columns:1fr 1fr 1fr 1.6fr;gap:24px;}
.pwr-footer-col h4{font-size:15px;margin:0 0 12px;color:#fff;}
.pwr-footer-col ul{list-style:none;margin:0;padding:0;}
.pwr-footer-col li{margin:7px 0;}
.pwr-footer-col a{color:var(--muted);font-size:14px;}
.pwr-footer-col a:hover{color:var(--primary);}
.pwr-footer-logo{font-weight:800;color:#fff;margin-bottom:10px;}
.pwr-footer-brand p{color:var(--muted);font-size:14px;margin:0;}
.pwr-footer-bottom{border-top:1px solid var(--line);margin-top:24px;padding-top:16px;color:var(--muted);font-size:13px;}

/* ===== Home ===== */
.pwr-hero{position:relative;overflow:hidden;background:
  radial-gradient(1200px 400px at 80% -10%,rgba(43,212,255,.18),transparent),
  radial-gradient(900px 360px at 0% 110%,rgba(255,122,47,.14),transparent),
  linear-gradient(180deg,#0B1424,#0A0F1A);}
.pwr-hero-wave{position:absolute;inset:0;opacity:.5;
  background-image:repeating-linear-gradient(90deg,rgba(43,212,255,.10) 0 1px,transparent 1px 46px),
    repeating-linear-gradient(0deg,rgba(43,212,255,.06) 0 1px,transparent 1px 46px);}
.pwr-hero-inner{position:relative;max-width:1100px;margin:0 auto;padding:70px 24px 64px;}
.pwr-hero-kicker{color:var(--primary);font-weight:700;letter-spacing:2px;font-size:14px;margin:0 0 14px;}
.pwr-hero-title{font-size:40px;line-height:1.25;margin:0 0 16px;color:#fff;}
.pwr-hero-sub{color:var(--muted);font-size:17px;max-width:760px;margin:0 0 26px;}
.pwr-hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.pwr-btn{display:inline-block;padding:12px 26px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;}
.pwr-btn-primary{background:linear-gradient(160deg,var(--primary),#0b6f8f);color:#04121a;border:none;}
.pwr-btn-primary:hover{text-decoration:none;color:#04121a;filter:brightness(1.08);}
.pwr-btn-ghost{border:1px solid var(--line-strong);color:#fff;background:transparent;}
.pwr-btn-ghost:hover{text-decoration:none;border-color:var(--primary);color:var(--primary);}

.pwr-stats{background:var(--surface);border-bottom:1px solid var(--line);}
.pwr-stats-inner{max-width:1100px;margin:0 auto;padding:26px 24px;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.pwr-stat{text-align:center;}
.pwr-stat-num{display:block;font-size:26px;font-weight:800;color:var(--primary);}
.pwr-stat-label{display:block;color:var(--muted);font-size:13px;margin-top:4px;}

.pwr-section{max-width:1100px;margin:0 auto;padding:52px 24px;}
.pwr-section-alt{background:var(--surface-2);max-width:none;}
.pwr-section-alt>.pwr-section-head,.pwr-section-alt>.pwr-prod-grid,.pwr-section-alt>.pwr-view-grid,
.pwr-section-alt>.pwr-scenario-row,.pwr-section-alt>.pwr-baseline{max-width:1100px;margin-left:auto;margin-right:auto;}
.pwr-section-head{margin-bottom:26px;}
.pwr-section-title{font-size:26px;margin:0 0 8px;color:#fff;}
.pwr-section-desc{color:var(--muted);margin:0;max-width:760px;}

.pwr-prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.pwr-prod-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:border-color .2s,transform .2s;}
.pwr-prod-card:hover{border-color:var(--primary);transform:translateY(-3px);text-decoration:none;}
.pwr-prod-name{font-size:18px;margin:0 0 8px;color:#fff;}
.pwr-prod-txt{color:var(--muted);font-size:14px;margin:0;}

.pwr-view-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.pwr-view-card{display:flex;align-items:center;gap:12px;background:var(--surface);border:1px solid var(--line);
  border-radius:10px;padding:16px 18px;color:var(--text);}
.pwr-view-card:hover{text-decoration:none;border-color:var(--primary);color:#fff;}
.pwr-view-no{display:inline-flex;width:30px;height:30px;align-items:center;justify-content:center;
  border-radius:8px;background:rgba(43,212,255,.14);color:var(--primary);font-weight:800;font-size:14px;}
.pwr-view-name{font-weight:600;}

.pwr-scenario-row{display:flex;flex-wrap:wrap;gap:12px;}
.pwr-scenario-cap{background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:9px 18px;color:var(--text);font-size:14px;}

.pwr-baseline{display:grid;grid-template-columns:1fr 1fr;gap:36px;}
.pwr-baseline-list{list-style:none;padding:0;margin:0;}
.pwr-baseline-list li{margin:10px 0;padding-left:18px;position:relative;color:var(--text);}
.pwr-baseline-list li::before{content:"▪";position:absolute;left:0;color:var(--accent);}
.pwr-baseline-list strong{color:var(--primary);}
.pwr-kw-row{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.pwr-kw{background:rgba(255,122,47,.12);border:1px solid rgba(255,122,47,.4);color:var(--accent);
  border-radius:8px;padding:7px 14px;font-size:14px;}
.pwr-cta-box{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;}
.pwr-cta-box p{color:var(--text);margin:0 0 14px;}

/* ===== 404 ===== */
.pwr-nf{display:flex;align-items:center;justify-content:center;min-height:60vh;}
.pwr-nf-inner{text-align:center;}
.pwr-nf-code{font-size:80px;font-weight:800;color:var(--primary);margin:0;}
.pwr-nf-title{font-size:26px;margin:0 0 10px;}
.pwr-nf-txt{color:var(--muted);margin:0 0 22px;}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .pwr-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--bg);
    border-bottom:1px solid var(--line);padding:10px 24px;}
  .pwr-nav.open{display:block;}
  .pwr-nav-list{flex-direction:column;align-items:stretch;gap:2px;}
  .pwr-nav-item{position:static;}
  .pwr-nav-sub{display:block;position:static;min-width:0;background:transparent;border:none;padding:0 0 0 12px;margin:0;box-shadow:none;}
  .pwr-nav-sub::before{display:none;}
  .pwr-nav-toggle{display:block;}
  .pwr-layout-grid{grid-template-columns:1fr;}
  .pwr-toc-aside{position:static;max-height:none;order:2;margin-top:18px;}
  .pwr-list-grid{grid-template-columns:1fr;}
  .pwr-cat-side{position:static;margin-bottom:18px;}
  .pwr-prod-grid,.pwr-view-grid{grid-template-columns:1fr 1fr;}
  .pwr-baseline{grid-template-columns:1fr;}
  .pwr-stats-inner{grid-template-columns:repeat(2,1fr);}
  .pwr-hero-title{font-size:30px;}
  .pwr-footer-cols{grid-template-columns:1fr 1fr;}
}
@media (max-width:600px){
  .pwr-prod-grid,.pwr-view-grid,.pwr-footer-cols{grid-template-columns:1fr;}
  .pwr-hero-title{font-size:26px;}
  .pwr-page-card{padding:20px 18px;}
  .pwr-takeaway ul{grid-template-columns:1fr;}
}