/* ===== blind.微波连接器.公司 · 紫晶深空 + 信号青 主题 (bmc- 前缀) ===== */
:root{
  --bmc-bg:#0A0E1A;
  --bmc-bg-2:#0F1525;
  --bmc-bg-3:#141C30;
  --bmc-line:#26304A;
  --bmc-text:#D7DEF0;
  --bmc-muted:#8A95B2;
  --bmc-violet:#8B5CF6;
  --bmc-cyan:#22D3EE;
  --bmc-violet-soft:rgba(139,92,246,.15);
  --bmc-cyan-soft:rgba(34,211,238,.12);
  --bmc-h2-inset:16px;
  --bmc-maxw:1180px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body.bmc-body{
  margin:0;background:var(--bmc-bg);color:var(--bmc-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.75;font-size:16px;
}
a{color:var(--bmc-cyan);text-decoration:none;}
a:hover{color:var(--bmc-violet);}
img{max-width:100%;}
h1,h2,h3,h4{color:#fff;line-height:1.35;font-weight:700;}
h1{font-size:30px;margin:0 0 18px;}
h2{font-size:23px;margin:34px 0 14px;padding-left:12px;border-left:3px solid var(--bmc-violet);}
h3{font-size:19px;margin:26px 0 10px;color:var(--bmc-cyan);}

/* 布局 */
.bmc-shell{max-width:var(--bmc-maxw);margin:0 auto;padding:18px 0 40px;}
.bmc-article-layout,.bmc-list-layout,.bmc-product-layout{
  --bmc-h2-inset:16px;max-width:var(--bmc-maxw);margin:0 auto;
}
.bmc-page-wrap{--bmc-h2-inset:48px;max-width:var(--bmc-maxw);margin:0 auto;}
.bmc-breadcrumb{
  padding:10px 16px 10px var(--bmc-h2-inset);
  font-size:13px;color:var(--bmc-muted);
  border-bottom:1px solid var(--bmc-line);margin-bottom:8px;
}
.bmc-breadcrumb a{color:var(--bmc-muted);}
.bmc-breadcrumb a:hover{color:var(--bmc-cyan);}
.bmc-breadcrumb span.sep{margin:0 8px;color:var(--bmc-line);}
.bmc-layout-grid{
  display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;
  padding:8px 16px 0 var(--bmc-h2-inset);
}
.bmc-list-layout .bmc-layout-grid{grid-template-columns:240px minmax(0,1fr);}
.bmc-page-wrap .bmc-layout-grid{grid-template-columns:minmax(0,1fr);}

/* 内容主体 */
.bmc-content-main{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);
  border-radius:14px;padding:26px 30px;min-width:0;}
.bmc-page-wrap .bmc-content-main{padding:30px 34px;}
.bmc-content-main p{margin:14px 0;}
.bmc-content-main ul.bmc-list{margin:14px 0;padding-left:22px;}
.bmc-content-main ul.bmc-list li{margin:8px 0;}

/* 摘要块 / 结论块 */
.bmc-quote{
  background:var(--bmc-violet-soft);border-left:3px solid var(--bmc-violet);
  border-radius:0 10px 10px 0;padding:14px 18px;margin:16px 0;color:#E7E2FF;
}
.bmc-quote strong{color:var(--bmc-cyan);}

/* 关键词行 */
.bmc-keywords{margin:8px 0 4px;font-size:14px;color:var(--bmc-muted);}
.bmc-keywords b{color:var(--bmc-cyan);font-weight:600;}

/* 更新时间 */
.bmc-content-main time{display:inline-block;font-size:13px;color:var(--bmc-muted);
  background:var(--bmc-bg-3);padding:3px 10px;border-radius:20px;margin:4px 0 12px;}

/* 标签 */
.tag-text{display:inline-block;font-size:12px;color:var(--bmc-cyan);
  background:var(--bmc-cyan-soft);border:1px solid rgba(34,211,238,.3);
  padding:1px 9px;border-radius:20px;margin:2px 4px 2px 0;}

/* 表格（M26 覆盖正文全部 table） */
.bmc-content-main table, .bmc-page-main table, table.bmc-spec{
  width:100%;border-collapse:collapse;margin:16px 0;font-size:14px;
  border:1px solid #4a5578;background:var(--bmc-bg-3);
}
.bmc-content-main table th, .bmc-content-main table td,
table.bmc-spec th, table.bmc-spec td{
  border:1px solid #4a5578;padding:9px 12px;text-align:left;
}
.bmc-content-main table th, table.bmc-spec th{
  background:var(--bmc-violet);color:#fff;font-weight:600;
}
.bmc-content-main table tbody tr:nth-child(even), table.bmc-spec tbody tr:nth-child(even){
  background:rgba(139,92,246,.08);
}

/* FAQ（原生 details，裸 details） */
.bmc-faq details{margin:12px 0;border:1px solid var(--bmc-line);border-radius:10px;
  background:var(--bmc-bg-3);overflow:hidden;}
.bmc-content-main details{margin:14px 0;border:1px solid var(--bmc-line);
  border-radius:10px;background:var(--bmc-bg-3);overflow:hidden;}
.bmc-content-main details summary{cursor:pointer;padding:12px 16px;font-weight:600;
  color:#fff;background:rgba(139,92,246,.12);list-style:none;}
.bmc-content-main details summary::-webkit-details-marker{display:none;}
.bmc-content-main details summary::after{content:"+";float:right;color:var(--bmc-cyan);}
.bmc-content-main details[open] summary::after{content:"−";}
.bmc-content-main details p{padding:0 16px 12px;margin:0;}

/* 相关阅读 / 相关产品 */
.bmc-related{border-top:1px dashed var(--bmc-line);margin-top:26px;padding-top:14px;}
.bmc-related h2{border-left-color:var(--bmc-cyan);}
.bmc-related ul{list-style:none;padding-left:0;}
.bmc-related li{margin:8px 0;padding-left:18px;position:relative;}
.bmc-related li::before{content:"→";position:absolute;left:0;color:var(--bmc-cyan);}

/* 实践经验 callout */
.bmc-caseout{background:var(--bmc-cyan-soft);border:1px solid rgba(34,211,238,.35);
  border-radius:10px;padding:12px 16px;margin:16px 0;}

/* TOC 悬浮（M25 原生 details，sticky 非 fixed） */
.bmc-toc-aside{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;}
.bmc-toc-panel{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);
  border-radius:12px;padding:6px 4px;}
.bmc-toc-panel summary{cursor:pointer;padding:10px 14px;font-weight:600;color:#fff;list-style:none;}
.bmc-toc-panel summary::-webkit-details-marker{display:none;}
.bmc-toc-panel summary::after{content:"≡";float:right;color:var(--bmc-cyan);}
.bmc-toc-inner{padding:4px 14px 12px;}
.bmc-toc-inner a{display:block;font-size:13px;color:var(--bmc-muted);padding:5px 0;border-bottom:1px solid var(--bmc-line);}
.bmc-toc-inner a:hover{color:var(--bmc-cyan);}

/* 列表 / 分类页 */
.bmc-cat-side{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);
  border-radius:12px;padding:14px 16px;align-self:start;position:sticky;top:80px;}
.bmc-cat-panel{margin:0;}
.bmc-cat-panel summary{cursor:pointer;font-weight:600;color:#fff;padding:6px 0;list-style:none;}
.bmc-cat-panel summary::-webkit-details-marker{display:none;}
.bmc-cat-panel summary::after{content:"▾";float:right;color:var(--bmc-cyan);}
.bmc-cat-panel ul.category-list{list-style:none;padding-left:0;margin:8px 0 0;}
.bmc-cat-panel ul.category-list li{margin:4px 0;}
.bmc-cat-panel ul.category-list a{display:block;padding:7px 10px;border-radius:8px;color:var(--bmc-muted);}
.bmc-cat-panel ul.category-list a:hover,.bmc-cat-panel ul.category-list a.active{
  background:var(--bmc-violet-soft);color:#fff;}
.bmc-cat-content{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);
  border-radius:14px;padding:22px 26px;}
.bmc-list-item{border-bottom:1px solid var(--bmc-line);padding:14px 0;}
.bmc-list-item h3{margin:0 0 6px;}
.bmc-list-item h3 a{color:#fff;}
.bmc-list-item p{margin:6px 0;color:var(--bmc-muted);font-size:14px;}

/* 头部导航 */
.bmc-header{position:sticky;top:0;z-index:50;background:rgba(10,14,26,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--bmc-line);}
.bmc-header-inner{max-width:var(--bmc-maxw);margin:0 auto;display:flex;align-items:center;
  justify-content:space-between;padding:0 18px;height:62px;}
.bmc-logo{font-size:18px;font-weight:800;color:#fff;letter-spacing:.5px;}
.bmc-logo span{color:var(--bmc-violet);}
.bmc-nav-list{display:flex;gap:2px;list-style:none;margin:0;padding:0;}
.bmc-nav-item{position:relative;}
.bmc-nav-link,.bmc-nav-item>a{display:block;padding:20px 14px;color:var(--bmc-text);
  font-size:15px;cursor:pointer;}
.bmc-nav-item>a:hover,.bmc-nav-link:hover{color:var(--bmc-cyan);}
.bmc-has-sub:hover .bmc-nav-sub{display:block;}
.bmc-nav-sub{display:none;position:absolute;top:100%;left:0;min-width:170px;
  background:var(--bmc-bg-3);border:1px solid var(--bmc-line);border-radius:0 0 10px 10px;
  padding:6px 0;box-shadow:0 12px 30px rgba(0,0,0,.5);}
.bmc-nav-sub a{display:block;padding:8px 16px;font-size:14px;color:var(--bmc-muted);}
.bmc-nav-sub a:hover{background:var(--bmc-violet-soft);color:#fff;}
.bmc-nav-toggle{display:none;background:none;border:1px solid var(--bmc-line);color:#fff;
  font-size:22px;border-radius:8px;width:42px;height:38px;cursor:pointer;}

/* 页脚 */
.bmc-footer{background:var(--bmc-bg-2);border-top:1px solid var(--bmc-line);margin-top:40px;}
.bmc-footer-inner{max-width:var(--bmc-maxw);margin:0 auto;display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;gap:24px;padding:34px 18px;}
.bmc-footer-logo{font-size:17px;font-weight:800;color:#fff;margin-bottom:10px;}
.bmc-footer-desc{color:var(--bmc-muted);font-size:14px;max-width:340px;}
.bmc-footer-col h4{font-size:15px;color:var(--bmc-cyan);margin:0 0 12px;}
.bmc-footer-col ul{list-style:none;padding:0;margin:0;}
.bmc-footer-col li{margin:7px 0;}
.bmc-footer-col a{color:var(--bmc-muted);font-size:14px;}
.bmc-footer-col a:hover{color:var(--bmc-cyan);}
.bmc-footer-bottom{border-top:1px solid var(--bmc-line);text-align:center;
  color:var(--bmc-muted);font-size:13px;padding:16px;}

/* 悬浮胶囊 */
.bmc-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;gap:10px;z-index:60;}
.bmc-float-btn{width:auto;min-width:46px;height:46px;border:none;border-radius:24px;
  background:linear-gradient(135deg,var(--bmc-violet),var(--bmc-cyan));color:#04101a;
  font-weight:700;font-size:18px;cursor:pointer;display:flex;align-items:center;
  gap:6px;padding:0 14px;box-shadow:0 6px 18px rgba(34,211,238,.3);}
.bmc-float-btn span{font-size:13px;}
.bmc-float-btn:hover{filter:brightness(1.1);}
.bmc-card-mask{position:fixed;inset:0;background:rgba(4,8,18,.8);z-index:70;
  display:flex;align-items:center;justify-content:center;}
.bmc-card-mask[hidden]{display:none;}
.bmc-card-pop{position:relative;background:#fff;border-radius:12px;padding:8px;}
.bmc-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;
  border-radius:50%;border:none;background:var(--bmc-violet);color:#fff;font-size:20px;cursor:pointer;}
.bmc-card-pop img{display:block;border-radius:8px;}

/* 首页布局覆盖 */
.bmc-home .bmc-content-main{border:none;background:transparent;padding:0 16px;min-width:0;}
.bmc-home .bmc-layout-grid{grid-template-columns:minmax(0,1fr);}
.bmc-muted{color:var(--bmc-muted);}
.bmc-cat-content{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);border-radius:14px;padding:22px 26px;}
.bmc-card a.bmc-btn{display:inline-block;margin-top:12px;font-size:14px;}
.bmc-list-item h3 a{color:#fff;}

/* 首页 */
.bmc-hero{background:radial-gradient(1200px 400px at 20% -10%,rgba(139,92,246,.35),transparent),
  radial-gradient(900px 360px at 90% 0%,rgba(34,211,238,.22),transparent),var(--bmc-bg-2);
  border:1px solid var(--bmc-line);border-radius:18px;padding:48px 40px;margin:0 0 26px;}
.bmc-hero h1{font-size:38px;background:linear-gradient(90deg,#fff,var(--bmc-cyan));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.bmc-hero p{color:var(--bmc-muted);font-size:17px;max-width:680px;}
.bmc-hero-cta{margin-top:20px;display:flex;gap:14px;flex-wrap:wrap;}
.bmc-btn{display:inline-block;padding:11px 22px;border-radius:24px;font-weight:600;}
.bmc-btn-violet{background:var(--bmc-violet);color:#fff;}
.bmc-btn-cyan{background:var(--bmc-cyan);color:#04101a;}
.bmc-stat{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:0 0 26px;}
.bmc-stat .cell{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);
  border-radius:14px;padding:18px;text-align:center;}
.bmc-stat .num{font-size:28px;font-weight:800;color:var(--bmc-cyan);}
.bmc-stat .lab{color:var(--bmc-muted);font-size:13px;margin-top:4px;}
.bmc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:0 0 26px;}
.bmc-card{background:var(--bmc-bg-2);border:1px solid var(--bmc-line);border-radius:14px;
  padding:20px;transition:.2s;}
.bmc-card:hover{border-color:var(--bmc-violet);transform:translateY(-3px);}
.bmc-card h3{margin:0 0 8px;}
.bmc-card p{color:var(--bmc-muted);font-size:14px;margin:0;}
.bmc-section-title{font-size:22px;color:#fff;margin:30px 0 14px;padding-left:12px;
  border-left:3px solid var(--bmc-cyan);}
.bmc-capsules{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 26px;}
.bmc-capsule{background:var(--bmc-violet-soft);border:1px solid var(--bmc-line);
  color:#E7E2FF;padding:8px 16px;border-radius:22px;font-size:14px;}

/* 响应式：≤1024px */
@media (max-width:1024px){
  .bmc-layout-grid{grid-template-columns:1fr !important;}
  .bmc-toc-aside{position:static;max-height:none;margin-top:14px;}
  .bmc-cat-side{position:static;margin-bottom:14px;}
  .bmc-nav-toggle{display:block;}
  .bmc-nav{display:none;position:absolute;top:62px;left:0;right:0;
    background:var(--bmc-bg-3);border-bottom:1px solid var(--bmc-line);}
  .bmc-nav.bmc-nav-open{display:block;}
  .bmc-nav-list{flex-direction:column;padding:6px 0;}
  .bmc-nav-item{padding:0;}
  .bmc-nav-link,.bmc-nav-item>a{padding:14px 18px;}
  .bmc-nav-sub{position:static;display:none;box-shadow:none;background:transparent;
    border:none;padding-left:18px;}
  .bmc-has-sub.bmc-sub-open .bmc-nav-sub{display:block;}
  .bmc-stat{grid-template-columns:repeat(2,1fr);}
  .bmc-grid{grid-template-columns:1fr;}
  .bmc-footer-inner{grid-template-columns:1fr 1fr;}
}
@media (max-width:600px){
  .bmc-hero{padding:30px 22px;}
  .bmc-hero h1{font-size:28px;}
  .bmc-content-main{padding:18px 16px;}
  .bmc-footer-inner{grid-template-columns:1fr;}
  .bmc-float-btn span{display:none;}
}