/* short.射频校准件.中国 —— 独立骨架样式（sht- 前缀，暗色高端科技风） */
:root{
  --sht-bg:#0C1320;
  --sht-surface:#141D2E;
  --sht-surface-2:#1B2740;
  --sht-primary:#E9A23B;
  --sht-accent:#41C7D6;
  --sht-text:#E6ECF5;
  --sht-muted:#9FB0C3;
  --sht-border:#2A384D;
  --sht-border-strong:#3A4D68;
  --sht-radius:10px;
  --sht-h2-inset:0px;
  --sht-container:1200px;
  --sht-bp:1024px;
  --sht-header-h:64px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--sht-bg);color:var(--sht-text);
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--sht-accent);text-decoration:none;}
a:hover{color:var(--sht-primary);}
img{max-width:100%;}
h1,h2,h3,h4{line-height:1.35;font-weight:700;color:#F3F7FC;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.5em;}
.sht-container{max-width:var(--sht-container);margin:0 auto;padding:0 24px;}
.sht-tag{display:inline-block;background:var(--sht-surface-2);color:var(--sht-accent);
  border:1px solid var(--sht-border);border-radius:999px;padding:2px 10px;font-size:12px;}
.sht-btn{display:inline-block;padding:11px 22px;border-radius:8px;font-weight:600;font-size:15px;transition:.2s;}
.sht-btn-primary{background:var(--sht-primary);color:#1A1205;}
.sht-btn-primary:hover{background:#F2B457;color:#1A1205;}
.sht-btn-ghost{border:1px solid var(--sht-border-strong);color:var(--sht-text);}
.sht-btn-ghost:hover{border-color:var(--sht-accent);color:var(--sht-accent);}

/* ===== 顶部导航 ===== */
.sht-header{position:fixed;top:0;left:0;right:0;height:var(--sht-header-h);
  background:rgba(12,19,32,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--sht-border);z-index:50;}
.sht-header-inner{display:flex;align-items:center;height:100%;gap:18px;}
.sht-logo{font-weight:800;font-size:18px;color:var(--sht-text);letter-spacing:.5px;white-space:nowrap;}
.sht-logo:hover{color:var(--sht-primary);}
.sht-nav-toggle{display:none;background:none;border:1px solid var(--sht-border-strong);color:var(--sht-text);
  font-size:20px;border-radius:6px;width:42px;height:38px;cursor:pointer;}
.sht-nav{flex:1;}
.sht-nav-list{display:flex;align-items:center;gap:6px;list-style:none;margin:0;padding:0;}
.sht-nav-list>li{position:relative;}
.sht-nav-list>li>a{display:block;padding:10px 14px;color:var(--sht-text);font-size:15px;border-radius:6px;}
.sht-nav-list>li>a:hover{background:var(--sht-surface-2);color:var(--sht-primary);}
.sht-nav-item{display:flex;align-items:center;}
.sht-nav-sub-btn{display:none;background:none;border:none;color:var(--sht-muted);cursor:pointer;font-size:16px;padding:4px;}
.sht-nav-sub{position:absolute;top:100%;left:0;min-width:180px;background:var(--sht-surface);
  border:1px solid var(--sht-border);border-radius:8px;padding:6px;list-style:none;margin:0;
  box-shadow:0 12px 30px rgba(0,0,0,.4);display:none;}
.sht-nav-item:hover .sht-nav-sub{display:block;}
.sht-nav-sub li a{display:block;padding:8px 12px;border-radius:6px;color:var(--sht-muted);font-size:14px;}
.sht-nav-sub li a:hover{background:var(--sht-surface-2);color:var(--sht-accent);}

/* ===== 面包屑（与 H2 左缘对齐） ===== */
.sht-main{padding-top:var(--sht-header-h);min-height:70vh;}
.sht-breadcrumb{padding:18px 0 4px;margin-left:var(--sht-h2-inset);}
.sht-crumb-list{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;font-size:13px;color:var(--sht-muted);}
.sht-crumb:not(:last-child)::after{content:"›";margin-left:6px;color:var(--sht-border-strong);}
.sht-crumb a{color:var(--sht-muted);}
.sht-crumb a:hover{color:var(--sht-accent);}
.sht-crumb-current span{color:var(--sht-text);}

/* ===== 详情页栅格 ===== */
.sht-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start;}
.sht-content-main{background:var(--sht-surface);border:1px solid var(--sht-border);border-radius:var(--sht-radius);
  padding:28px 32px;min-width:0;}
.sht-h1{font-size:28px;margin:0 0 18px;}
.sht-body{color:var(--sht-text);}
.sht-body h2{font-size:21px;margin:30px 0 12px;padding-left:12px;border-left:4px solid var(--sht-primary);}
.sht-body h3{font-size:18px;margin:22px 0 10px;color:var(--sht-accent);}
.sht-body p{color:#D6E0EC;}
.sht-body blockquote{background:var(--sht-surface-2);border-left:4px solid var(--sht-accent);
  padding:14px 18px;border-radius:8px;margin:18px 0;color:#CFE6EC;}
.sht-body blockquote p{margin:0;}
.sht-body ul,.sht-body ol{color:#D6E0EC;}
.sht-body time{display:inline-block;color:var(--sht-muted);font-size:13px;border:1px solid var(--sht-border);
  border-radius:6px;padding:3px 10px;margin:6px 0 14px;}

/* 表格边框覆盖全部正文表格（含 Markdown 裸 table） */
.sht-content-main table,.sht-page-article table,table.sht-spec{
  width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;
  border:1px solid var(--sht-border-strong);}
.sht-content-main table th,.sht-page-article table th,table.sht-spec th{
  background:var(--sht-surface-2);color:var(--sht-text);text-align:left;padding:10px 12px;
  border:1px solid var(--sht-border-strong);}
.sht-content-main table td,.sht-page-article table td,table.sht-spec td{
  padding:10px 12px;border:1px solid var(--sht-border);color:#D6E0EC;}
.sht-content-main table tr:nth-child(even) td,.sht-page-article table tr:nth-child(even) td,
table.sht-spec tr:nth-child(even) td{background:rgba(27,39,64,.5);}

/* FAQ 裸 details */
.sht-faq{margin-top:26px;border-top:1px solid var(--sht-border);padding-top:16px;}
.sht-faq details{border:1px solid var(--sht-border);border-radius:8px;margin:10px 0;background:var(--sht-surface-2);}
.sht-faq details summary{cursor:pointer;padding:12px 16px;font-weight:600;color:var(--sht-text);}
.sht-faq details summary:hover{color:var(--sht-primary);}
.sht-faq details p{margin:0;padding:0 16px 14px;color:#D6E0EC;}

/* 目录面板 */
.sht-toc-aside{position:sticky;top:calc(var(--sht-header-h) + 16px);max-height:calc(100vh - 96px);overflow:auto;}
.sht-toc-panel,.sht-cat-panel{background:var(--sht-surface);border:1px solid var(--sht-border);border-radius:var(--sht-radius);padding:14px 16px;}
.sht-panel-summary{cursor:pointer;font-weight:700;color:var(--sht-text);list-style:none;}
.sht-panel-summary::-webkit-details-marker{display:none;}
.sht-panel-summary::before{content:"▸";display:inline-block;margin-right:8px;color:var(--sht-accent);transition:.2s;}
.sht-toc-panel[open]>.sht-panel-summary::before,.sht-cat-panel[open]>.sht-panel-summary::before{transform:rotate(90deg);}
.sht-toc-list{list-style:none;margin:10px 0 0;padding:0;counter-reset:toc;}
.sht-toc-item{counter-increment:toc;margin:6px 0;font-size:14px;color:var(--sht-muted);}
.sht-toc-item::before{content:counter(toc) ". ";color:var(--sht-primary);}
.sht-toc-item a{color:var(--sht-muted);}
.sht-toc-item a:hover{color:var(--sht-accent);}

/* ===== 列表 / 分类页 ===== */
.sht-list-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;align-items:start;margin:8px 0 40px;}
.sht-cat-side{position:sticky;top:calc(var(--sht-header-h) + 16px);}
.sht-category-list{list-style:none;margin:12px 0 0;padding:0;}
.sht-cat-li{margin:2px 0;}
.sht-cat-li a{display:block;padding:9px 12px;border-radius:6px;color:var(--sht-muted);font-size:14px;border-left:3px solid transparent;}
.sht-cat-li a:hover{background:var(--sht-surface-2);color:var(--sht-accent);}
.sht-cat-active a{background:var(--sht-surface-2);color:var(--sht-primary);border-left-color:var(--sht-primary);}
.sht-cat-head{margin:8px 0 18px;}
.sht-cat-desc{color:var(--sht-muted);}
.sht-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px;}
.sht-card{background:var(--sht-surface);border:1px solid var(--sht-border);border-radius:var(--sht-radius);padding:18px 20px;transition:.2s;}
.sht-card:hover{border-color:var(--sht-accent);transform:translateY(-2px);}
.sht-card-title{font-size:17px;margin:0 0 8px;}
.sht-card-title a{color:var(--sht-text);}
.sht-card-title a:hover{color:var(--sht-primary);}
.sht-card-meta{margin:0 0 8px;}
.sht-card-desc{color:var(--sht-muted);font-size:14px;margin:0;}

/* ===== 静态页 ===== */
.sht-page-wrap{max-width:860px;margin:8px auto 40px;}
.sht-page-wrap .sht-breadcrumb{}
.sht-page-article{background:var(--sht-surface);border:1px solid var(--sht-border);border-radius:var(--sht-radius);padding:28px 32px;}

/* ===== 首页 ===== */
.sht-hero{background:linear-gradient(135deg,#0C1320 0%,#14243C 100%);border-bottom:1px solid var(--sht-border);}
.sht-hero-inner{display:grid;grid-template-columns:1.4fr .9fr;gap:40px;align-items:center;padding:64px 24px 56px;}
.sht-hero-kicker{color:var(--sht-accent);font-weight:600;letter-spacing:1px;margin:0 0 12px;}
.sht-hero-title{font-size:40px;margin:0 0 16px;line-height:1.2;}
.sht-hero-sub{color:var(--sht-muted);font-size:17px;max-width:620px;}
.sht-hero-cta{margin-top:24px;display:flex;gap:14px;flex-wrap:wrap;}
.sht-hero-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.sht-stat{background:var(--sht-surface);border:1px solid var(--sht-border);border-radius:var(--sht-radius);padding:20px;text-align:center;}
.sht-stat-num{display:block;font-size:34px;font-weight:800;color:var(--sht-primary);}
.sht-stat-label{color:var(--sht-muted);font-size:13px;}
.sht-section{padding:54px 0;}
.sht-section-alt{background:var(--sht-surface);}
.sht-section-title{font-size:26px;margin:0 0 24px;padding-left:12px;border-left:4px solid var(--sht-primary);}
.sht-prod-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px;}
.sht-prod-card{background:var(--sht-surface);border:1px solid var(--sht-border);border-radius:var(--sht-radius);padding:22px;transition:.2s;display:block;color:inherit;}
.sht-prod-card:hover{border-color:var(--sht-accent);transform:translateY(-3px);}
.sht-prod-name{font-size:18px;margin:0 0 10px;color:var(--sht-text);}
.sht-prod-desc{color:var(--sht-muted);font-size:14px;margin:0;}
.sht-keyword-caps{display:flex;flex-wrap:wrap;gap:12px;}
.sht-cap{background:var(--sht-surface-2);border:1px solid var(--sht-border);border-radius:999px;padding:8px 16px;color:var(--sht-accent);font-size:14px;}
.sht-two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px;}
.sht-baseline{color:#D6E0EC;}
.sht-scenario-list{list-style:none;margin:0;padding:0;}
.sht-scenario-item{background:var(--sht-surface);border:1px solid var(--sht-border);border-left:3px solid var(--sht-accent);
  border-radius:8px;padding:12px 16px;margin:10px 0;color:#D6E0EC;}
.sht-section-cta{background:linear-gradient(135deg,#14243C,#0C1320);border-top:1px solid var(--sht-border);border-bottom:1px solid var(--sht-border);text-align:center;}
.sht-cta-title{font-size:28px;margin:0 0 12px;}
.sht-cta-sub{color:var(--sht-muted);max-width:620px;margin:0 auto 22px;}
.sht-404{text-align:center;padding:80px 24px;}

/* ===== 页脚 ===== */
.sht-footer{background:var(--sht-surface);border-top:1px solid var(--sht-border);margin-top:40px;}
.sht-footer-inner{padding:40px 24px 24px;}
.sht-footer-cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;}
.sht-footer-logo{font-weight:800;font-size:18px;margin-bottom:10px;}
.sht-footer-desc{color:var(--sht-muted);font-size:14px;max-width:420px;}
.sht-footer-h{font-size:15px;color:var(--sht-text);margin:0 0 12px;}
.sht-footer-ul{list-style:none;margin:0;padding:0;}
.sht-footer-ul li{margin:6px 0;}
.sht-footer-ul a{color:var(--sht-muted);font-size:14px;}
.sht-footer-ul a:hover{color:var(--sht-accent);}
.sht-footer-bottom{border-top:1px solid var(--sht-border);margin-top:24px;padding-top:16px;color:var(--sht-muted);font-size:13px;}

/* ===== 悬浮胶囊 ===== */
.sht-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.sht-float-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  width:56px;height:56px;border:none;border-radius:28px;cursor:pointer;
  background:linear-gradient(135deg,var(--sht-primary),#F2B457);color:#1A1205;
  box-shadow:0 8px 22px rgba(233,162,59,.35);font-size:11px;font-weight:700;transition:.2s;}
.sht-float-btn:hover{transform:scale(1.06);}
.sht-float-ico{font-size:18px;line-height:1;}
.sht-float-mail{background:linear-gradient(135deg,var(--sht-accent),#5FE0EC);color:#06222A;box-shadow:0 8px 22px rgba(65,199,214,.35);}
.sht-float-card{background:linear-gradient(135deg,#7C8AA5,#A7B6CF);color:#0C1320;box-shadow:0 8px 22px rgba(124,138,165,.35);}

/* 名片弹层 */
.sht-card-overlay{position:fixed;inset:0;background:rgba(8,12,20,.78);z-index:80;
  display:flex;align-items:center;justify-content:center;}
.sht-card-overlay[hidden]{display:none;}
.sht-card-box{position:relative;}
.sht-card-img{display:block;border-radius:12px;box-shadow:0 20px 60px rgba(0,0,0,.6);}
.sht-card-close{position:absolute;top:-14px;right:-14px;width:36px;height:36px;border-radius:50%;
  border:none;background:var(--sht-surface-2);color:var(--sht-text);font-size:20px;cursor:pointer;}

/* ===== 响应式（≤1024px） ===== */
@media (max-width:1024px){
  .sht-nav-toggle{display:block;}
  .sht-nav{position:absolute;top:var(--sht-header-h);left:0;right:0;background:var(--sht-surface);
    border-bottom:1px solid var(--sht-border);display:none;padding:10px 0;}
  .sht-nav.open{display:block;}
  .sht-nav-list{flex-direction:column;align-items:stretch;gap:0;}
  .sht-nav-item{flex-direction:column;align-items:stretch;}
  .sht-nav-sub-btn{display:block;position:absolute;right:14px;top:6px;}
  .sht-nav-sub{position:static;display:none;box-shadow:none;border:none;background:var(--sht-surface-2);padding-left:20px;}
  .sht-nav-item.open .sht-nav-sub{display:block;}
  .sht-hero-inner{grid-template-columns:1fr;padding:40px 24px;}
  .sht-hero-title{font-size:30px;}
  .sht-two-col{grid-template-columns:1fr;}
  .sht-footer-cols{grid-template-columns:1fr;}
  /* 详情页：内容占满，目录降为可点击折叠面板（非 display:none） */
  .sht-layout-grid{grid-template-columns:1fr;}
  .sht-toc-aside{position:static;max-height:none;margin-top:18px;}
  /* 列表页：侧栏在前、内容在后，≤1024 单列 */
  .sht-list-grid{grid-template-columns:1fr;}
  .sht-cat-side{position:static;}
  .sht-content-main,.sht-page-article{padding:20px 18px;}
}
@media (max-width:600px){
  .sht-hero-stats{grid-template-columns:1fr 1fr;}
  .sht-float{right:10px;}
  .sht-float-btn{width:50px;height:50px;}
}