/* ============================================================
   tnc.射频连接器.公司 · 亮色商业科技风设计系统
   ============================================================ */
:root{
  --ink:#0d1b2e;          /* 主文字 */
  --ink-2:#3c4a5f;        /* 次级文字 */
  --ink-3:#6b7a90;        /* 弱化文字 */
  --brand:#0a5cff;        /* 科技蓝 */
  --brand-deep:#083ea8;
  --brand-soft:#e8f0ff;
  --bg:#f5f7fb;
  --card:#ffffff;
  --line:#e2e8f2;
  --ok:#0d8a4f;
  --warn:#b45309;
  --radius:12px;
  --shadow:0 1px 2px rgba(13,27,46,.05),0 8px 24px rgba(13,27,46,.06);
  --shadow-lg:0 12px 40px rgba(8,32,74,.18);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);background:var(--bg);
  font:15px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{color:var(--brand-deep)}
img{max-width:100%;height:auto}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--line);transition:box-shadow .2s;
}
.site-header.scrolled{box-shadow:var(--shadow)}
.header-in{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand-mark{flex:none}
.brand-t{display:flex;flex-direction:column;line-height:1.25}
.brand-t strong{font-size:17px;letter-spacing:.5px}
.brand-t em{font-style:normal;font-size:11px;color:var(--ink-3)}
.nav{display:flex;gap:6px;margin-left:auto}
.nav a{padding:8px 13px;border-radius:8px;color:var(--ink-2);font-size:14.5px;white-space:nowrap}
.nav a:hover{background:var(--brand-soft);color:var(--brand)}
.nav-btn{display:none;margin-left:auto;background:none;border:0;color:var(--ink);cursor:pointer;padding:8px}

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(1000px 400px at 85% -10%,rgba(10,92,255,.10),transparent 60%),
    radial-gradient(700px 300px at 5% 110%,rgba(10,92,255,.07),transparent 60%),
    linear-gradient(180deg,#fdfefe 0%,#f2f6fd 100%);
  border-bottom:1px solid var(--line);
}
.hero-in{padding:72px 20px 56px;max-width:1180px;margin:0 auto}
.hero-kicker{margin:0 0 14px;font-size:13px;letter-spacing:2px;color:var(--brand);font-weight:600}
.hero h1{margin:0 0 18px;font-size:clamp(28px,4.6vw,44px);line-height:1.3;letter-spacing:.5px}
.hero h1 span{color:var(--brand)}
.hero-lead{max-width:760px;margin:0 0 26px;color:var(--ink-2);font-size:16px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.hero-facts{display:flex;flex-wrap:wrap;gap:14px;list-style:none;margin:0;padding:0}
.hero-facts li{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:12px 22px;display:flex;flex-direction:column;box-shadow:var(--shadow);
}
.hero-facts strong{font-size:20px;color:var(--brand-deep)}
.hero-facts span{font-size:12.5px;color:var(--ink-3)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 22px;border-radius:9px;border:1px solid transparent;
  font-size:15px;cursor:pointer;transition:.15s;background:none;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep);color:#fff}
.btn-ghost{border-color:var(--line);background:var(--card);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:14px 30px;font-size:16px}

/* ---------- sections ---------- */
.section{padding:56px 0}
.section.alt{background:linear-gradient(180deg,#eef3fa 0%,#f5f7fb 100%)}
.sec-title{margin:0 0 6px;font-size:clamp(20px,3vw,26px)}
.sec-title::after{content:"";display:block;width:44px;height:3px;background:var(--brand);border-radius:2px;margin-top:10px}
.sec-sub{margin:0 0 26px;color:var(--ink-2)}
.sec-more{margin-top:26px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

.feat,.panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow);
}
.feat h3{margin:0 0 8px;font-size:17px}
.feat p{margin:0 0 12px;color:var(--ink-2);font-size:14px}
.more{font-size:14px;font-weight:600}
.panel h3{margin:0 0 10px;font-size:16px}
.panel.do h3{color:var(--ok)}
.panel.dont h3{color:var(--warn)}
.panel ul{margin:0;padding-left:18px;color:var(--ink-2);font-size:14px}
.panel li{margin-bottom:8px}

.scene-list{margin:0;padding:0;list-style:none;counter-reset:s}
.scene-list li{
  counter-increment:s;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:16px 18px 16px 58px;margin-bottom:12px;
  position:relative;color:var(--ink-2);font-size:14.5px;box-shadow:var(--shadow);
}
.scene-list li::before{
  content:counter(s,decimal-leading-zero);position:absolute;left:16px;top:14px;
  font-weight:700;color:var(--brand);font-size:18px;
}
.scene-list strong{color:var(--ink)}

.post-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.post-cat{margin:0 0 6px;font-size:12px;color:var(--brand);font-weight:600;letter-spacing:1px}
.post-card h3{margin:0 0 8px;font-size:16px;line-height:1.5}
.post-card h3 a{color:var(--ink)}
.post-card h3 a:hover{color:var(--brand)}
.post-s{margin:0;color:var(--ink-2);font-size:13.5px}

.contact-strip{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.contact-strip .sec-sub{margin-bottom:0;max-width:640px}

/* ---------- table.data ---------- */
.table-scroll{overflow-x:auto}
table.data{
  width:100%;border-collapse:collapse;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  font-size:14px;box-shadow:var(--shadow);
}
table.data caption{caption-side:top;text-align:left;padding:0 0 10px;color:var(--ink-3);font-size:13px}
table.data th,table.data td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
table.data thead th{background:var(--brand-soft);color:var(--brand-deep);font-size:13.5px;white-space:nowrap}
table.data tbody tr:last-child td{border-bottom:0}
table.data tbody tr:hover{background:#f7faff}
table.data td:first-child{font-weight:600;white-space:nowrap}

/* ---------- list page ---------- */
.list-wrap{display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px;padding-top:36px;padding-bottom:56px}
.cat-side{align-self:start;position:sticky;top:84px}
.cat-h{margin:0 0 10px;font-size:13px;color:var(--ink-3);letter-spacing:1px}
ul.category-list{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);box-shadow:var(--shadow)}
ul.category-list a{display:block;padding:11px 16px;color:var(--ink-2);font-size:14.5px;border-left:3px solid transparent}
ul.category-list a:hover{background:var(--brand-soft);color:var(--brand)}
ul.category-list a.active{background:var(--brand-soft);color:var(--brand);border-left-color:var(--brand);font-weight:600}
.cat-content h1{margin:0 0 8px;font-size:26px}
.cat-desc{margin:0 0 24px;color:var(--ink-2)}
.row-list{list-style:none;margin:0;padding:0}
.row{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin-bottom:14px;box-shadow:var(--shadow)}
.row-t{margin:0 0 6px;font-size:16.5px;line-height:1.5}
.row-t a{color:var(--ink)}
.row-t a:hover{color:var(--brand)}
.row-s{margin:0 0 8px;color:var(--ink-2);font-size:14px}
.row-m{margin:0;font-size:12.5px;color:var(--ink-3)}
.arch-group{border:0;background:none;box-shadow:none;padding:6px 2px;margin:0;font-weight:700;color:var(--brand);font-size:15px}
.arch-h{margin:30px 0 14px;font-size:20px}

/* ---------- archive page ---------- */
.arch-wrap{max-width:1080px;padding-top:36px;padding-bottom:64px}
.arch-hero h1{margin:0 0 8px;font-size:26px}
.arch-sec{margin-top:8px}
.arch-group-head{display:flex;align-items:baseline;justify-content:space-between;gap:16px;border-bottom:2px solid var(--line);margin:26px 0 16px;padding-bottom:8px}
.arch-group-head .arch-group{font-size:16px;padding:0}
.arch-more{font-size:13px;color:var(--brand);text-decoration:none;white-space:nowrap}
.arch-more:hover{text-decoration:underline}
.arch-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.arch-grid .row{margin-bottom:0;display:flex;flex-direction:column}
.arch-grid .row-t{font-size:16px}
.arch-grid .row-s{flex:1}
.arch-grid .row{transition:transform .18s ease,box-shadow .18s ease}
.arch-grid .row:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(10,92,255,.10)}
@media (max-width:640px){
  .arch-grid{grid-template-columns:1fr}
  .arch-group-head{flex-direction:column;gap:4px}
}

/* ---------- detail page ---------- */
.detail-wrap{display:grid;grid-template-columns:minmax(0,760px) 240px;gap:32px;justify-content:center;padding-top:36px;padding-bottom:64px}
.page-wrap{padding-top:36px;padding-bottom:64px;max-width:860px}
.doc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:34px 38px;box-shadow:var(--shadow)}
.doc h1{margin:6px 0 12px;font-size:clamp(22px,3.4vw,30px);line-height:1.4}
.doc.notfound{text-align:center;padding:80px 38px}
.doc.notfound h1{font-size:64px;color:var(--brand)}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0 0 10px;padding:0;font-size:13px;color:var(--ink-3)}
.crumbs li{display:flex;align-items:center;gap:6px}
.crumbs li+li::before{content:"›";color:var(--ink-3)}
.crumbs a{color:var(--ink-3)}
.crumbs a:hover{color:var(--brand)}
.bc-current{color:var(--ink)}
.meta-line{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:22px;font-size:13px;color:var(--ink-3)}
.chip{background:var(--brand-soft);color:var(--brand);border-radius:999px;padding:2px 12px;font-size:12.5px}
.tag-text{background:#f0f3f8;border:1px solid var(--line);color:var(--ink-2);border-radius:999px;padding:2px 10px;font-size:12px}
.doc-body{font-size:15.5px;color:#22314a}
.doc-body h2{font-size:21px;margin:34px 0 12px;padding-left:12px;border-left:4px solid var(--brand);line-height:1.4}
.doc-body h2:first-child{margin-top:6px}
.doc-body h3{font-size:17px;margin:24px 0 8px}
.doc-body p{margin:0 0 14px}
.doc-body ul,.doc-body ol{margin:0 0 14px;padding-left:22px}
.doc-body li{margin-bottom:6px}
.doc-body blockquote{
  margin:16px 0;padding:12px 18px;background:var(--brand-soft);
  border-left:4px solid var(--brand);border-radius:0 8px 8px 0;color:var(--brand-deep);
}
.doc-body table.data{margin:16px 0 22px}
.lead{font-size:16px;color:var(--ink-2);background:#f7f9fd;border:1px solid var(--line);border-radius:var(--radius);padding:14px 18px}
.practice{margin:20px 0;padding:16px 18px;background:#f4faf6;border:1px solid #cfe8da;border-radius:var(--radius)}
.practice strong{color:var(--ok);display:block;margin-bottom:6px}
.practice p{margin:0;color:var(--ink-2);font-size:14px}
.rel-prod ul{list-style:none;margin:0;padding:0}
.rel-prod li{padding:12px 0;border-top:1px dashed var(--line)}
.rel-prod li a{font-weight:600;display:block}
.rel-prod li span{display:block;font-size:13.5px;color:var(--ink-3)}

/* FAQ（裸 details，与 faq_dom: bare_details 对齐） */
.doc-body details,.cat-faq details{
  border:1px solid var(--line);border-radius:10px;margin-bottom:10px;background:#fbfcfe;
}
.doc-body summary,.cat-faq summary{
  cursor:pointer;padding:12px 16px;font-weight:600;color:var(--ink);list-style:none;position:relative;padding-right:36px;
}
.doc-body summary::-webkit-details-marker,.cat-faq summary::-webkit-details-marker{display:none}
.doc-body summary::after,.cat-faq summary::after{
  content:"+";position:absolute;right:16px;top:50%;transform:translateY(-50%);
  color:var(--brand);font-size:18px;font-weight:700;
}
.doc-body details[open] summary::after,.cat-faq details[open] summary::after{content:"−"}
.doc-body details p,.cat-faq details p{margin:0;padding:0 16px 14px;color:var(--ink-2);font-size:14.5px}
.cat-faq h2{font-size:19px;margin:34px 0 14px}

/* ---------- TOC ---------- */
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 100px);overflow-y:auto}
.toc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}
.toc-h{margin:0 0 10px;font-weight:700;font-size:14px}
.toc ul{list-style:none;margin:0;padding:0}
.toc li{margin-bottom:2px}
.toc a{display:block;padding:6px 8px;border-radius:7px;color:var(--ink-2);font-size:13.5px;line-height:1.5}
.toc a:hover{background:var(--brand-soft);color:var(--brand)}

/* ---------- footer ---------- */
.site-footer{background:#0d1b2e;color:#c6d2e2;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding:44px 20px 30px}
.foot-name{margin:0 0 10px;font-size:18px;color:#fff;font-weight:700}
.foot-name span{font-size:12px;color:#7f93ad;margin-left:6px;font-weight:400}
.foot-desc{margin:0;font-size:13.5px;color:#93a5bd;line-height:1.8}
.foot-h{margin:0 0 12px;font-size:14px;color:#fff;font-weight:600}
.foot-col ul{list-style:none;margin:0;padding:0}
.foot-col li{margin-bottom:8px}
.foot-col a{color:#93a5bd;font-size:13.5px}
.foot-col a:hover{color:#fff}
.foot-beian{border-top:1px solid rgba(255,255,255,.08);padding:18px 20px 24px;text-align:center;font-size:13px;color:#7f93ad}
.foot-beian p{margin:4px 0}
.foot-beian a{color:#a9b8cc}
.foot-beian a:hover{color:#fff}
.beian .sep{margin:0 10px}
.beian .ga{display:inline-flex;align-items:center;gap:5px}
.beian .ga img{border-radius:2px;vertical-align:middle}

/* ---------- side capsule（中部 · 图标+文字） ---------- */
.side-capsule{
  position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:70;
  display:flex;flex-direction:column;gap:10px;
}
.cap-btn{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  width:56px;height:56px;border-radius:999px;border:1px solid var(--line);
  background:var(--card);color:var(--brand);cursor:pointer;
  box-shadow:var(--shadow-lg);transition:.15s;
}
.cap-btn:hover{background:var(--brand);color:#fff;border-color:var(--brand)}
.cap-t{font-size:11px;line-height:1.2;font-weight:600;letter-spacing:1px}

/* ---------- card modal ---------- */
.card-modal{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center}
.card-modal[hidden]{display:none}
.cm-mask{position:absolute;inset:0;background:rgba(9,20,38,.62);backdrop-filter:blur(3px)}
.cm-body{
  position:relative;margin:0;z-index:1;background:var(--card);border-radius:14px;
  padding:10px;box-shadow:var(--shadow-lg);max-width:min(88vw,440px);animation:pop .18s ease;
}
@keyframes pop{from{transform:scale(.94);opacity:0}to{transform:scale(1);opacity:1}}
.cm-body img{display:block;width:100%;height:auto;border-radius:10px}
.cm-body figcaption{padding:10px 6px 4px;text-align:center;font-size:13.5px;color:var(--ink-2)}
.cm-close{
  position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;
  border:0;background:var(--ink);color:#fff;font-size:20px;cursor:pointer;line-height:1;
  box-shadow:var(--shadow);
}
.cm-close:hover{background:var(--brand)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:1fr 1fr}
  .detail-wrap{grid-template-columns:minmax(0,1fr)}
  .toc-aside{position:static;max-height:none;order:-1}
  .toc{display:none}
  .toc:target{display:block}
}
@media (max-width:768px){
  .nav{
    display:none;position:absolute;top:64px;left:0;right:0;background:var(--card);
    flex-direction:column;padding:10px 16px 16px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  }
  .nav.open{display:flex}
  .nav-btn{display:block}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .list-wrap{grid-template-columns:1fr}
  .cat-side{position:static}
  .hero-in{padding:48px 20px 40px}
  .doc{padding:24px 20px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .contact-strip{flex-direction:column;align-items:flex-start}
}