/* ===========================================================
   6G 射频测试与计量平台 —— 原创样式（深空蓝 + 青色辉光 + 玻璃拟态）
   与既有兄弟站零复用。
   =========================================================== */
:root{
  --bg:#0a0e1a; --bg2:#0f1626; --bg3:#142036;
  --text:#e8eef7; --muted:#aab6c8; --faint:#6b7892;
  --primary:#00d4ff; --primary2:#0a84ff; --primary3:#1e6bff;
  --line:#243049; --line2:#2f3f5e;
  --glow:rgba(0,212,255,.35); --glow-soft:rgba(0,212,255,.12);
  --ok:#22c55e; --warn:#f59e0b; --err:#ef4444;
  --radius:16px; --radius-sm:10px;
  --maxw:1180px;
  --header-h:64px;
  --h2-inset:16px;          /* 面包屑 / H2 左缘对齐基准（文章/列表/产品） */
  --font:"PingFang SC","Microsoft YaHei",Roboto,system-ui,-apple-system,"Segoe UI",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font); color:var(--text); background:var(--bg);
  line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1200px 600px at 80% -10%, rgba(10,132,255,.18), transparent 60%),
    radial-gradient(900px 500px at 0% 0%, rgba(0,212,255,.10), transparent 55%);
  background-attachment:fixed;
}
a{color:var(--primary); text-decoration:none; transition:color .2s}
a:hover{color:#7fe6ff}
img{max-width:100%; display:block}
h1,h2,h3,h4{font-weight:700; line-height:1.3; color:#fff}
.container{max-width:var(--maxw); margin:0 auto; padding:0 24px; width:100%}

/* ---------------- 顶部固定导航 ---------------- */
.site-header{
  position:fixed; top:0; left:0; right:0; height:var(--header-h); z-index:60;
  background:rgba(10,14,26,.72); backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{max-width:var(--maxw); margin:0 auto; height:100%;
  display:flex; align-items:center; gap:18px; padding:0 24px}
.brand{display:flex; align-items:center; gap:10px; font-weight:700; font-size:18px; color:#fff}
.brand:hover{color:#fff}
.brand-mark{width:22px; height:22px; border-radius:6px;
  background:linear-gradient(135deg,var(--primary),var(--primary2));
  box-shadow:0 0 14px var(--glow); position:relative}
.brand-mark::after{content:""; position:absolute; inset:6px; border-radius:3px;
  border:2px solid rgba(255,255,255,.85)}
.site-nav{margin-left:auto}
.site-nav ul{display:flex; gap:6px; list-style:none}
.site-nav a{display:block; padding:8px 14px; border-radius:999px; color:var(--muted);
  font-size:15px; position:relative}
.site-nav a:hover{color:#fff; background:var(--glow-soft)}
.nav-toggle{display:none; flex-direction:column; gap:5px; background:none; border:0; cursor:pointer; margin-left:auto; padding:8px}
.nav-toggle span{width:24px; height:2px; background:var(--text); border-radius:2px; transition:.25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------------- 通用按钮 ---------------- */
.btn-primary,.btn-ghost{display:inline-block; padding:12px 26px; border-radius:999px;
  font-weight:600; font-size:15px; transition:.25s; cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary2)); color:#04121f;
  box-shadow:0 6px 24px var(--glow)}
.btn-primary:hover{color:#04121f; transform:translateY(-2px); box-shadow:0 10px 32px var(--glow)}
.btn-ghost{border:1px solid var(--line2); color:var(--text)}
.btn-ghost:hover{border-color:var(--primary); color:#fff; background:var(--glow-soft)}

/* ---------------- 首页 Hero ---------------- */
.home{padding-top:var(--header-h)}
.hero{position:relative; overflow:hidden; padding:96px 0 72px}
.hero-glow{position:absolute; top:-160px; right:-120px; width:560px; height:560px; border-radius:50%;
  background:radial-gradient(circle, rgba(0,212,255,.30), transparent 65%); filter:blur(20px)}
.hero-inner{position:relative; max-width:var(--maxw); margin:0 auto; padding:0 24px}
.hero-kicker{color:var(--primary); font-weight:600; letter-spacing:.04em; margin-bottom:14px}
.hero-title{font-size:54px; line-height:1.15; letter-spacing:-.01em;
  background:linear-gradient(120deg,#ffffff,#bfe9ff 60%,var(--primary));
  -webkit-background-clip:text; background-clip:text; color:transparent}
.hero-sub{margin:22px 0 30px; font-size:18px; color:var(--muted); max-width:720px}
.hero-cta{display:flex; gap:14px; flex-wrap:wrap}
.hero-tags{list-style:none; display:flex; flex-wrap:wrap; gap:10px; margin-top:34px}
.hero-tags li{padding:7px 14px; border:1px solid var(--line2); border-radius:999px;
  font-size:13px; color:var(--muted); background:rgba(255,255,255,.02)}

/* ---------------- 区块通用 ---------------- */
.section{padding:64px 0}
.section-title{font-size:30px; margin-bottom:10px}
.section-lead{color:var(--muted); margin-bottom:34px}
.card-grid{display:grid; gap:20px}
.core-grid{grid-template-columns:repeat(3,1fr)}

/* 玻璃拟态卡片 */
.glass-card{position:relative; display:block; padding:26px 24px; border-radius:var(--radius);
  background:linear-gradient(160deg, rgba(20,32,54,.85), rgba(15,22,38,.7));
  border:1px solid var(--line2); overflow:hidden; transition:.3s; color:var(--text)}
.glass-card::before{content:""; position:absolute; inset:0; border-radius:inherit; padding:1px;
  background:linear-gradient(135deg, var(--glow), transparent 40%);
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor; mask-composite:exclude; opacity:.6; pointer-events:none}
.glass-card:hover{transform:translateY(-6px); border-color:var(--primary);
  box-shadow:0 16px 40px rgba(0,212,255,.18)}
.glass-card h3{font-size:20px; margin-top:8px}
.card-idx{font-size:13px; color:var(--primary); font-weight:700; letter-spacing:.1em}
.card-arrow{position:absolute; right:22px; bottom:22px; color:var(--primary); font-size:20px; opacity:0; transition:.3s}
.glass-card:hover .card-arrow{opacity:1; transform:translateX(4px)}

/* 应用场景 */
.scen-list{list-style:none; display:grid; grid-template-columns:repeat(auto-fit,minmax(260px,1fr)); gap:14px}
.scen-item{display:flex; align-items:center; gap:12px; padding:16px 18px; border:1px solid var(--line);
  border-radius:var(--radius-sm); background:rgba(255,255,255,.02); color:var(--text)}
.scen-dot{width:10px; height:10px; border-radius:50%; background:var(--primary); box-shadow:0 0 10px var(--glow); flex:0 0 auto}

/* 数据条 */
.stats-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.stat-box{padding:26px 22px; border-radius:var(--radius); border:1px solid var(--line2);
  background:linear-gradient(160deg, rgba(20,32,54,.7), rgba(15,22,38,.5)); text-align:center}
.stat-num{font-size:28px; font-weight:700; color:var(--primary);
  background:linear-gradient(120deg,var(--primary),#bfe9ff); -webkit-background-clip:text; background-clip:text; color:transparent}
.stat-label{color:var(--muted); font-size:14px; margin-top:8px}

/* 精选两列 */
.two-col{display:grid; grid-template-columns:1fr 1fr; gap:40px}
.feat-list{list-style:none; margin:18px 0 22px}
.feat-list li{margin-bottom:14px; padding-bottom:14px; border-bottom:1px dashed var(--line)}
.feat-list a{font-weight:600; color:var(--text)}
.feat-list a:hover{color:var(--primary)}
.feat-cat{display:inline-block; font-size:12px; color:var(--primary); border:1px solid var(--line2);
  border-radius:6px; padding:1px 8px; margin-right:8px}
.feat-desc{display:block; color:var(--muted); font-size:14px; margin-top:4px}

/* ---------------- 面包屑（左缘对齐 H2） ---------------- */
.breadcrumb{padding:18px 0 14px; --h2-inset:16px}
.breadcrumb ol{list-style:none; display:flex; flex-wrap:wrap; align-items:center; gap:2px; font-size:13px; color:var(--faint)}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{margin:0 7px; color:var(--faint)}
.breadcrumb [aria-current]{color:var(--text)}

/* ---------------- 列表 / 详情栅格 ---------------- */
/* 详情页：内容在前、TOC 在后 */
.article-layout,.product-layout,.list-layout{padding-top:calc(var(--header-h) + 8px); padding-bottom:64px}
.layout-grid{display:grid; gap:40px; align-items:start}
.article-layout .layout-grid,.product-layout .layout-grid{grid-template-columns:minmax(0,1fr) 240px}
/* 列表页：分类侧栏在前、内容在后（[M27] 列序） */
.list-layout .layout-grid{grid-template-columns:240px minmax(0, 1fr)}

.content-main{max-width:820px}
.doc-title{font-size:34px; margin-bottom:14px; line-height:1.25}
.doc-lead{color:var(--muted); font-size:17px; margin-bottom:18px}
.doc-keywords{margin-bottom:10px}
.product-meta{margin-bottom:18px; display:flex; gap:8px; flex-wrap:wrap}
.tag-text{display:inline-block; font-size:12px; padding:3px 10px; border-radius:6px;
  background:var(--glow-soft); border:1px solid var(--line2); color:var(--primary)}
.status-在售{color:var(--ok)} .status-预发布{color:var(--warn)} .status-停产{color:var(--err)}

/* 正文排版 */
.doc-body{font-size:16px; color:#dbe4f1}
.doc-body h2{font-size:24px; margin:34px 0 14px; padding-bottom:8px;
  border-bottom:1px solid var(--line); position:relative}
.doc-body h2::before{content:""; position:absolute; left:0; bottom:-1px; width:54px; height:2px;
  background:linear-gradient(90deg,var(--primary),transparent)}
.doc-body h3{font-size:19px; margin:24px 0 10px; color:#eaf3ff}
.doc-body p{margin:12px 0; color:#cdd8e8}
.doc-body ul,.doc-body ol{margin:12px 0 12px 22px}
.doc-body li{margin:6px 0}
.doc-body blockquote{margin:16px 0; padding:12px 18px; border-left:3px solid var(--primary);
  background:var(--glow-soft); border-radius:0 var(--radius-sm) var(--radius-sm) 0; color:#dbe7f5}
.doc-body strong{color:#fff}

/* 表格边框全覆盖（[M26] / [M23-7]）：bare <table> 与 table.spec 均上边框 */
table.spec,.content-main table,.page-main table{
  width:100%; border-collapse:collapse; margin:18px 0; font-size:15px;
  border:1px solid #cbd5e1; border-radius:10px; overflow:hidden}
table.spec th,.content-main table th,.page-main table th{
  background:linear-gradient(135deg,var(--primary2),var(--primary3)); color:#fff;
  text-align:left; padding:11px 14px; font-weight:600; border:1px solid #cbd5e1}
table.spec td,.content-main table td,.page-main table td{
  padding:10px 14px; border:1px solid #cbd5e1; color:#dbe4f1}
table.spec tbody tr:nth-child(even) td,.content-main table tbody tr:nth-child(even) td,
.page-main table tbody tr:nth-child(even) td{background:rgba(255,255,255,.035)}

/* 经验 callout */
.callout{margin:22px 0; padding:16px 20px; border-radius:var(--radius-sm);
  border:1px solid var(--line2); background:rgba(34,197,94,.06)}
.callout strong{color:var(--ok); display:block; margin-bottom:4px}

/* FAQ（裸 details） */
.faq-block{margin:28px 0}
.faq-item{border:1px solid var(--line2); border-radius:var(--radius-sm); margin-bottom:10px;
  background:rgba(255,255,255,.02); overflow:hidden}
.faq-item summary{cursor:pointer; padding:14px 18px; font-weight:600; color:#eaf3ff; list-style:none;
  display:flex; align-items:center; gap:10px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"?"; width:22px; height:22px; flex:0 0 auto; border-radius:50%;
  background:var(--glow-soft); color:var(--primary); display:grid; place-items:center; font-size:13px; font-weight:700}
.faq-item[open] summary::before{content:"−"}
.faq-item p{padding:0 18px 16px; color:var(--muted)}

/* 相关阅读 */
.related-block{margin:30px 0; padding-top:18px; border-top:1px solid var(--line)}
.related-block h2{font-size:20px; margin-bottom:12px}
.related-list{list-style:none; display:grid; gap:10px}
.related-list a{display:block; padding:12px 16px; border:1px solid var(--line2); border-radius:var(--radius-sm);
  color:var(--text); background:rgba(255,255,255,.02)}
.related-list a:hover{border-color:var(--primary); color:#fff}

/* 目录 TOC（sticky，非 fixed） */
.toc-aside{position:sticky; top:calc(var(--header-h) + 16px); align-self:start; max-height:calc(100vh - 100px); overflow:auto}
.toc-panel{border:1px solid var(--line2); border-radius:var(--radius-sm); background:rgba(15,22,38,.6); padding:12px 14px}
.toc-panel summary{cursor:pointer; font-weight:600; color:var(--primary); list-style:none; padding:4px 2px 8px}
.toc-panel summary::-webkit-details-marker{display:none}
.toc-panel summary::after{content:"▾"; float:right; color:var(--muted)}
.toc-body ul{list-style:none; margin:0; padding-left:4px}
.toc-body li{margin:7px 0; font-size:14px; border-left:2px solid var(--line); padding-left:10px}
.toc-body a{color:var(--muted)}
.toc-body a:hover{color:var(--primary)}

/* ---------------- 列表页 ---------------- */
.cat-side{position:sticky; top:calc(var(--header-h) + 16px); align-self:start}
.cat-panel{border:1px solid var(--line2); border-radius:var(--radius-sm); background:rgba(15,22,38,.6); overflow:hidden}
.cat-panel summary{cursor:pointer; padding:14px 16px; font-weight:700; color:#fff; list-style:none;
  background:linear-gradient(135deg, rgba(10,132,255,.18), transparent); border-bottom:1px solid var(--line)}
.cat-panel summary::-webkit-details-marker{display:none}
.cat-panel summary::after{content:"▾"; float:right; color:var(--muted)}
.category-list{list-style:none; padding:8px}
.category-list li{margin:2px 0}
.category-list a{display:block; padding:9px 12px; border-radius:8px; color:var(--muted); font-size:15px}
.category-list a:hover{background:var(--glow-soft); color:#fff}
.category-list li.active a{background:var(--glow-soft); color:var(--primary); font-weight:600}
.list-title{font-size:32px; margin-bottom:8px}
.list-intro{color:var(--muted); margin-bottom:24px}
.entry-list{list-style:none}
.entry-row{padding:20px 0; border-bottom:1px solid var(--line)}
.entry-title{font-size:19px; font-weight:600; color:#fff}
.entry-title:hover{color:var(--primary)}
.entry-desc{color:var(--muted); margin:8px 0 4px}
.entry-meta{font-size:13px; color:var(--faint)}

/* ---------------- 叶子页 ---------------- */
.page-wrap{padding-top:calc(var(--header-h) + 8px); padding-bottom:64px}
.page-card{max-width:880px; margin:0 auto; --h2-inset:48px; padding:40px;
  border:1px solid var(--line2); border-radius:var(--radius);
  background:linear-gradient(160deg, rgba(20,32,54,.7), rgba(15,22,38,.55))}
.page-title{font-size:34px; margin-bottom:18px}
.page-body{font-size:16px; color:#dbe4f1}
.page-body h2{font-size:22px; margin:28px 0 12px; color:#eaf3ff}
.page-body h3{font-size:18px; margin:20px 0 8px}
.page-body p{margin:12px 0}
.page-body ul,.page-body ol{margin:12px 0 12px 22px}
.page-body table.spec{margin:16px 0}

/* 归档 */
.archive-h{font-size:22px; margin:26px 0 10px; color:#eaf3ff}
.archive-list{list-style:none}
.archive-list li{display:flex; align-items:center; gap:12px; padding:11px 0; border-bottom:1px solid var(--line)}
.archive-list a{font-weight:600; color:var(--text)}
.archive-cat{margin-left:auto; font-size:12px; color:var(--primary); border:1px solid var(--line2); border-radius:6px; padding:1px 8px}
.notfound{text-align:center}

/* ---------------- 右侧悬浮胶囊 ---------------- */
.capsule{position:fixed; right:18px; top:50%; transform:translateY(-50%); z-index:70;
  display:flex; flex-direction:column; gap:8px; padding:10px 8px; border-radius:999px;
  background:linear-gradient(160deg, rgba(0,212,255,.95), rgba(10,132,255,.92));
  box-shadow:0 10px 30px rgba(0,212,255,.4); border:1px solid rgba(255,255,255,.35)}
.cap-btn{width:52px; height:52px; border:0; border-radius:50%; cursor:pointer;
  background:rgba(255,255,255,.12); color:#fff; display:flex; flex-direction:column;
  align-items:center; justify-content:center; gap:2px; transition:.2s; font-size:11px}
.cap-btn svg{width:20px; height:20px; fill:#fff}
.cap-btn:hover{background:rgba(255,255,255,.28); transform:scale(1.06)}
.card-modal{position:fixed; inset:0; z-index:90; display:grid; place-items:center}
.card-modal[hidden]{display:none}
.card-modal-backdrop{position:absolute; inset:0; background:rgba(4,8,16,.78); backdrop-filter:blur(4px)}
.card-modal-body{position:relative; z-index:1; padding:14px; border-radius:14px;
  background:rgba(255,255,255,.04); border:1px solid var(--line2); box-shadow:0 20px 60px rgba(0,0,0,.5)}
.card-img{width:300px; height:500px; object-fit:contain; border-radius:8px; background:#fff}
.card-close{position:absolute; top:-14px; right:-14px; width:34px; height:34px; border-radius:50%;
  border:0; background:#fff; color:#04121f; font-size:20px; cursor:pointer; box-shadow:0 4px 12px rgba(0,0,0,.4)}

/* ---------------- 页脚 ---------------- */
.site-footer{border-top:1px solid var(--line); background:rgba(10,14,26,.7); padding:40px 0; margin-top:30px}
.footer-inner{max-width:var(--maxw); margin:0 auto; padding:0 24px; text-align:center}
.footer-brand{display:flex; align-items:center; justify-content:center; gap:10px; font-weight:700; color:#fff; margin-bottom:12px}
.footer-note{color:var(--faint); font-size:13px; max-width:760px; margin:0 auto 16px; line-height:1.7}
.footer-nav{display:flex; flex-wrap:wrap; gap:16px; justify-content:center; margin-bottom:14px}
.footer-nav a{color:var(--muted); font-size:14px}
.footer-copy{color:var(--faint); font-size:12px}

/* ---------------- 响应式（断点 1024，与原生 details 折叠一致 [M25]） ---------------- */
@media (max-width:1024px){
  .hero-title{font-size:40px}
  .core-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .two-col{grid-template-columns:1fr}
  .article-layout .layout-grid,.product-layout .layout-grid,.list-layout .layout-grid{
    grid-template-columns:1fr}
  .toc-aside,.cat-side{position:static; max-height:none; margin-bottom:20px}
  .site-nav{position:fixed; top:var(--header-h); left:0; right:0; background:rgba(10,14,26,.96);
    border-bottom:1px solid var(--line); transform:translateY(-120%); transition:.3s; padding:10px 0}
  .site-nav.open{transform:translateY(0)}
  .site-nav ul{flex-direction:column; gap:0; padding:0 16px}
  .site-nav a{display:block; padding:14px; border-bottom:1px solid var(--line)}
  .nav-toggle{display:flex}
  .capsule{right:10px}
}
@media (max-width:640px){
  .hero-title{font-size:32px}
  .core-grid,.stats-grid{grid-template-columns:1fr}
  .container{padding:0 16px}
  .page-card{padding:26px 18px}
  .cap-btn{width:46px; height:46px}
}