:root{
  --bg:#0a0e1a; --bg2:#0d1424; --panel:#121a2e; --panel2:#162038;
  --line:rgba(120,160,220,.14); --line2:rgba(120,160,220,.28);
  --txt:#e7eefb; --muted:#9fb0c8; --dim:#6f819a;
  --cyan:#36e0ff; --blue:#3b82f6; --accent:#52f2c8;
  --radius:14px; --maxw:1180px;
  --shadow:0 18px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  background:radial-gradient(1200px 700px at 80% -10%,rgba(59,130,246,.16),transparent 60%),
             radial-gradient(900px 600px at 0% 10%,rgba(54,224,255,.10),transparent 55%),
             linear-gradient(180deg,var(--bg),var(--bg2));
  color:var(--txt);line-height:1.75;-webkit-font-smoothing:antialiased;min-height:100vh}
a{color:var(--cyan);text-decoration:none}
a:hover{color:#fff}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
img{max-width:100%}

/* Header */
.site-header{position:sticky;top:0;z-index:40;backdrop-filter:blur(14px);
  background:rgba(10,14,26,.72);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.5px;color:#fff}
.brand-mark{width:26px;height:26px;border-radius:7px;
  background:linear-gradient(135deg,var(--cyan),var(--blue));box-shadow:0 0 18px rgba(54,224,255,.55)}
.brand-name{font-size:17px}
.topnav{display:flex;gap:26px}
.topnav a{color:var(--muted);font-weight:600;font-size:15px;position:relative;padding:6px 0}
.topnav a:hover{color:#fff}
.topnav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--cyan);transition:.25s}
.topnav a:hover::after{width:100%}
.nav-toggle{display:none;background:none;border:1px solid var(--line2);color:#fff;border-radius:8px;font-size:18px;padding:4px 10px}

/* Breadcrumb（与 .wrap 同宽居中，避免贴屏幕左缘） */
.breadcrumb{max-width:var(--maxw);margin:0 auto;padding:14px 22px 0}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;font-size:13px;color:var(--dim)}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:8px;color:var(--dim)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--cyan)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:96px 0 72px}
.hero-bg{position:absolute;inset:0;background:
  linear-gradient(120deg,rgba(59,130,246,.18),transparent 45%),
  conic-gradient(from 200deg at 70% 20%,rgba(54,224,255,.20),transparent 35%);
  mask:linear-gradient(180deg,#000,transparent)}
.hero-inner{position:relative;max-width:880px}
.hero-kicker{display:inline-block;font-size:13px;letter-spacing:2px;color:var(--cyan);
  border:1px solid var(--line2);padding:6px 14px;border-radius:999px;margin-bottom:22px}
.hero-title{font-size:clamp(34px,6vw,58px);margin:0 0 18px;font-weight:900;line-height:1.1;
  background:linear-gradient(180deg,#fff,#bcd4f5);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:18px;color:var(--muted);max-width:720px;margin:0 0 30px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.btn-primary{display:inline-block;padding:13px 26px;border-radius:11px;font-weight:700;color:#04121f;
  background:linear-gradient(135deg,var(--cyan),var(--accent));box-shadow:0 10px 30px rgba(54,224,255,.35)}
.btn-primary:hover{color:#04121f;filter:brightness(1.07)}
.btn-ghost{display:inline-block;padding:13px 26px;border-radius:11px;font-weight:700;color:#fff;
  border:1px solid var(--line2);background:rgba(255,255,255,.03)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}

/* Bands & sections */
.band{padding:64px 0}
.band-alt{background:rgba(255,255,255,.02);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-title{font-size:clamp(24px,3vw,34px);margin:0 0 8px;font-weight:800;color:#fff}
.sec-sub{color:var(--muted);margin:0 0 30px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.card,.article-card{display:block;background:linear-gradient(180deg,var(--panel),var(--panel2));
  border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:.25s;position:relative;overflow:hidden}
.card:hover,.article-card:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:var(--shadow)}
.card-no{position:absolute;right:16px;top:10px;font-size:34px;font-weight:900;color:rgba(54,224,255,.12)}
.card h3,.article-card h3{margin:6px 0 8px;color:#fff;font-size:19px}
.card p,.article-card p{margin:0;color:var(--muted);font-size:14px}
.ac-cat{font-size:12px;color:var(--cyan);letter-spacing:1px}
.more-link{margin-top:24px}
.more-link a{font-weight:700}

/* Capability grid */
.cap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cap{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.cap h3{margin:0 0 8px;color:var(--cyan);font-size:17px}
.cap p{margin:0;color:var(--muted);font-size:14px}

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

/* Article layout */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:40px;align-items:start;padding:28px 0 60px}
.article-body{max-width:760px}
.article-head{border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:8px}
.article-head h1{font-size:clamp(26px,4vw,38px);margin:0 0 14px;color:#fff;line-height:1.2}
.summary-block{background:rgba(54,224,255,.06);border-left:3px solid var(--cyan);padding:14px 16px;border-radius:0 10px 10px 0;color:#dbe7f7;margin:0 0 12px;font-size:15px}
.kw-row{color:var(--muted);font-size:13px;margin:0 0 6px}
.kw-label{color:var(--dim)}
.tag-text{display:inline-block;background:rgba(255,255,255,.05);border:1px solid var(--line);border-radius:999px;padding:2px 10px;margin-right:6px;color:var(--muted);font-size:12px}
.update-line{color:var(--dim);font-size:13px;margin:0}
.article-main h2{font-size:24px;color:#fff;margin:34px 0 12px;scroll-margin-top:80px}
.article-main h3{font-size:19px;color:#dbe7f7;margin:24px 0 10px;scroll-margin-top:80px}
.article-main p{color:#cdd9ea;margin:0 0 14px}
.article-main ul,.article-main ol{padding-left:22px;color:#cdd9ea}
.article-main li{margin:6px 0}
.article-main table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px}
.article-main th,.article-main td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.article-main th{background:rgba(59,130,246,.14);color:#fff}
.article-main blockquote{border-left:3px solid var(--cyan);margin:14px 0;padding:10px 16px;background:rgba(255,255,255,.03);color:#cfe}
.article-main code{background:rgba(255,255,255,.08);padding:1px 6px;border-radius:5px;font-size:13px}
table.data{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px}
table.data th,table.data td{border:1px solid var(--line);padding:9px 12px}
table.data th{background:rgba(59,130,246,.14);color:#fff}

/* FAQ */
.faq{border-top:1px solid var(--line);margin-top:34px;padding-top:10px}
.faq h2{font-size:22px;color:#fff;margin:10px 0 14px}
.faq details{border:1px solid var(--line);border-radius:10px;padding:0 14px;margin:10px 0;background:rgba(255,255,255,.02)}
.faq summary{cursor:pointer;font-weight:700;color:#eaf2ff;padding:13px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"+";color:var(--cyan);margin-right:10px;font-weight:900}
.faq details[open] summary::before{content:"−"}
.faq details p{color:var(--muted);margin:0 0 14px;padding-left:22px}

/* Related */
.related{border-top:1px solid var(--line);margin-top:30px;padding-top:14px}
.related h2{font-size:20px;color:#fff}
.related ul{list-style:none;padding:0}
.related li{padding:8px 0;border-bottom:1px solid var(--line);color:var(--muted);font-size:14px}

/* TOC */
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 110px);overflow-y:auto}
.toc{background:rgba(255,255,255,.02);border:1px solid var(--line);border-radius:12px;padding:16px}
.toc-title{margin:0 0 10px;font-size:13px;color:var(--dim);letter-spacing:1px}
.toc ol{list-style:none;margin:0;padding:0}
.toc li{margin:7px 0;font-size:14px}
.toc li a{color:var(--muted)}
.toc li a:hover{color:var(--cyan)}
.toc .lvl-3{padding-left:14px;font-size:13px}

/* List / category pages */
.list-layout{display:grid;grid-template-columns:230px minmax(0,1fr);gap:36px;padding:28px 0 60px;align-items:start}
.cat-side{position:sticky;top:84px}
/* 分类折叠：桌面端无折叠外观，移动端（≤980px）可点收起 */
.cat-collapse > summary{list-style:none}
.cat-collapse > summary::-webkit-details-marker{display:none}
.cat-collapse > summary::after{content:""}
@media(max-width:980px){
  .cat-collapse > summary{cursor:pointer;position:relative;padding-right:26px;color:var(--cyan);font-weight:700}
  .cat-collapse > summary::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);color:var(--cyan);font-weight:900;font-size:16px}
  .cat-collapse[open] > summary::after{content:"−"}
}
.cat-side-title{font-size:15px;color:var(--dim);letter-spacing:1px;margin:0 0 12px}
ul.category-list{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
ul.category-list li{padding:2px 0}
ul.category-list a{display:block;padding:9px 14px;color:var(--muted);border-radius:0 8px 8px 0;font-weight:600}
ul.category-list li.active a,.category-list a:hover{background:rgba(54,224,255,.10);color:var(--cyan)}
.cat-content h1{font-size:30px;color:#fff;margin:0 0 12px}
.cat-intro{color:var(--muted);margin:0 0 24px}
.item-list{list-style:none;margin:0;padding:0}
.item-row{padding:16px 0;border-bottom:1px solid var(--line)}
.item-title{font-size:18px;font-weight:700;color:#eaf2ff}
.item-desc{color:var(--muted);font-size:14px;margin:6px 0 0}
.item-meta{color:var(--dim);font-size:13px;margin-left:10px}

/* Product params */
.product-params table.data th:first-child{width:38%}

/* Pages */
.page-body{max-width:820px;padding:28px 0 60px}
.page-body h1{font-size:32px;color:#fff;margin:0 0 20px}
.page-body h2{font-size:22px;color:#fff;margin:28px 0 10px}
.page-body p{color:#cdd9ea}

/* Archive / 404 */
.archive{padding:28px 0 60px}
.archive h1{color:#fff;font-size:32px}
.archive h2{color:#eaf2ff;font-size:22px;margin-top:30px}
.notfound{text-align:center;padding:120px 0}
.notfound h1{font-size:80px;color:var(--cyan);margin:0}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:rgba(8,12,22,.6);margin-top:40px}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:28px;padding:46px 0 26px}
.fcol h3{color:#fff;font-size:17px;margin:0 0 12px}
.fcol h4{color:var(--cyan);font-size:14px;margin:0 0 12px;letter-spacing:1px}
.fcol p,.fcol li{color:var(--muted);font-size:14px}
.fcol ul{list-style:none;margin:0;padding:0}
.fcol li{margin:6px 0}
.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:16px 0;color:var(--dim);font-size:13px}

/* Float capsules + modal */
.float-capsule{position:fixed;right:18px;z-index:60;display:flex;align-items:center;gap:8px;
  padding:10px 16px;border:none;border-radius:999px;cursor:pointer;font-weight:700;font-size:14px;color:#04121f;
  background:linear-gradient(135deg,var(--cyan),var(--accent));box-shadow:0 10px 28px rgba(54,224,255,.4);
  transition:transform .2s,filter .2s}
.float-capsule:hover{transform:translateY(-2px);filter:brightness(1.06)}
/* 带 hidden 时强制隐藏（to-top 在未滚动时隐藏，避免遮挡企业微信按钮） */
.float-capsule[hidden]{display:none !important}
.cap-ico{font-size:16px}
/* 企业微信名片：固定右侧中部偏下 */
#wechat-trigger{top:calc(50% + 28px);bottom:auto;transform:translateY(-50%)}
#wechat-trigger:hover{transform:translateY(-50%) translateY(-2px)}
/* 一键到顶：固定右侧中部偏上，悬于企业微信胶囊正上方（留约 12px 间隙，避免遮挡点击） */
.to-top{top:calc(50% - 28px);bottom:auto;transform:translateY(-50%);background:rgba(20,30,52,.9);color:#fff;border:1px solid var(--line2);box-shadow:var(--shadow)}
.to-top:hover{color:var(--cyan);border-color:var(--cyan);transform:translateY(-50%) translateY(-2px)}
.modal{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center}
.modal[hidden]{display:none}
.modal-mask{position:absolute;inset:0;background:rgba(4,8,16,.78);backdrop-filter:blur(4px)}
.modal-card{position:relative;background:var(--panel);border:1px solid var(--line2);border-radius:16px;padding:18px;box-shadow:var(--shadow);text-align:center}
.modal-x{position:absolute;right:10px;top:6px;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}
.modal-tip{color:var(--muted);font-size:13px;margin:0 0 12px}
.modal-card img{max-width:300px;width:300px;height:auto;border-radius:10px;display:block}

/* Responsive */
@media(max-width:980px){
  .grid-3,.grid-2,.cap-grid{grid-template-columns:1fr 1fr}
  .article-layout{grid-template-columns:1fr}
  .toc-aside{display:none}
  .list-layout{grid-template-columns:1fr}
  .cat-side{position:static}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .topnav{display:none}
  .nav-toggle{display:block}
  .grid-3,.grid-2,.cap-grid,.footer-inner{grid-template-columns:1fr}
  .hero{padding:64px 0 48px}
  #wechat-trigger{top:calc(50% + 28px);bottom:auto;transform:translateY(-50%)}
  #wechat-trigger:hover{transform:translateY(-50%) translateY(-2px)}
  .to-top{top:calc(50% - 28px);bottom:auto;transform:translateY(-50%)}
}

/* ===== Hero V2（首页）===== */
.hero-v2{position:relative;margin:26px 0 8px;padding:clamp(28px,5vw,56px) clamp(22px,4vw,52px);
  border-radius:22px;border:1px solid var(--line2);overflow:hidden;
  background:
    radial-gradient(900px 480px at 88% -20%,rgba(54,224,255,.16),transparent 55%),
    radial-gradient(700px 420px at -10% 110%,rgba(59,130,246,.20),transparent 55%),
    linear-gradient(160deg,#101a30,#0b1222)}
.hero-v2::before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(120,160,220,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(120,160,220,.07) 1px,transparent 1px);
  background-size:44px 44px;
  mask:radial-gradient(720px 420px at 30% 20%,#000,transparent 75%)}
.hero-v2-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,1fr);
  gap:clamp(24px,4vw,56px);align-items:center}
.hero-v2-title{font-size:clamp(32px,5vw,54px);margin:20px 0 16px;font-weight:900;line-height:1.12;
  background:linear-gradient(180deg,#fff,#bcd4f5);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-v2-sub{font-size:16.5px;color:var(--muted);margin:0 0 26px;max-width:640px}
.hero-points{list-style:none;margin:26px 0 0;padding:0;display:grid;gap:9px}
.hero-points li{color:var(--muted);font-size:14px;padding-left:24px;position:relative}
.hero-points li::before{content:"✓";position:absolute;left:0;top:0;color:var(--accent);font-weight:900}
.hero-v2-panel{position:relative;background:rgba(10,16,30,.72);border:1px solid var(--line2);
  border-radius:18px;padding:24px 22px;box-shadow:var(--shadow);backdrop-filter:blur(6px)}
.hero-v2-panel::before{content:"";position:absolute;inset:-1px;border-radius:18px;padding:1px;pointer-events:none;
  background:linear-gradient(160deg,rgba(54,224,255,.45),transparent 40%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude}
.panel-cap{margin:0 0 14px;font-size:12px;letter-spacing:2px;color:var(--dim)}
.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.stat{background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:12px;padding:14px}
.stat b{display:block;font-size:30px;font-weight:900;color:var(--cyan);line-height:1.15}
.stat span{display:block;margin-top:5px;color:var(--muted);font-size:12.5px;line-height:1.5}
.panel-link{display:inline-block;margin-top:16px;font-weight:700;font-size:14px}
.prod-card .card-go{display:inline-block;margin-top:14px;font-size:13.5px;font-weight:700;color:var(--cyan)}
.prod-card::after{content:"";position:absolute;left:0;top:0;width:100%;height:3px;
  background:linear-gradient(90deg,var(--cyan),transparent 70%);opacity:0;transition:.25s}
.prod-card:hover::after{opacity:1}
@media(max-width:980px){
  .hero-v2-grid{grid-template-columns:1fr}
  .hero-v2-panel{max-width:520px}
}
@media(max-width:640px){
  .hero-v2{margin:16px 0 4px;padding:26px 18px;border-radius:16px}
  .stat b{font-size:24px}
}