/* mct- 独立骨架样式 · 微波连接器检测与性能验证平台
   配色：深空墨蓝 #0A1626 / 校验青 #1FB6C9 / 信号琥珀 #F4A93B */

:root{
  --bg:#0A1626;
  --bg-soft:#0F2036;
  --surface:#122A45;
  --surface-2:#16334f;
  --cyan:#1FB6C9;
  --cyan-soft:#2fd6e6;
  --amber:#F4A93B;
  --text:#E6EEF5;
  --muted:#9FB3C8;
  --line:#28455F;
  --line-soft:#1d3346;
  --shadow:0 10px 30px rgba(0,0,0,.35);
  --radius:14px;
  --nav-h:64px;
  /* [M18c++] 面包屑对齐变量：文章/列表/产品=16px，页面卡片=48px */
  --h2-inset:16px;
  --maxw:1200px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  color:var(--text);
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(31,182,201,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, rgba(244,169,59,.08), transparent 55%),
    var(--bg);
  line-height:1.75;
  font-size:16px;
}
a{color:var(--cyan);text-decoration:none}
a:hover{color:var(--cyan-soft)}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.35;font-weight:700}
h1{font-size:30px;margin:0 0 18px}
h2{font-size:23px;margin:34px 0 14px;color:#fff;border-left:4px solid var(--cyan);padding-left:12px}
h3{font-size:19px;margin:26px 0 10px;color:var(--cyan-soft)}
p{margin:0 0 16px}
ul,ol{margin:0 0 16px;padding-left:24px}
li{margin:6px 0}
blockquote{
  margin:18px 0;padding:14px 18px;
  background:linear-gradient(90deg,rgba(31,182,201,.12),rgba(31,182,201,.02));
  border-left:4px solid var(--cyan);border-radius:10px;color:#dceaf2;
}
code{background:var(--surface-2);padding:2px 6px;border-radius:6px;color:var(--amber);font-size:.92em}

/* ===== 布局容器 ===== */
.mct-container{max-width:var(--maxw);margin:0 auto;padding:0 16px}
.mct-page-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 16px;margin:28px auto;max-width:var(--maxw);box-shadow:var(--shadow)}

/* 详情页：内容在前 + TOC 在后 */
.mct-article-layout,.mct-product-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;
  max-width:var(--maxw);margin:24px auto;padding:0 16px;align-items:start;
}
/* 列表/分类页：侧栏在前 + 内容在后 */
.mct-list-layout{
  display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;
  max-width:var(--maxw);margin:24px auto;padding:0 16px;align-items:start;
}
@media (max-width:1024px){
  .mct-article-layout,.mct-product-layout,.mct-list-layout{grid-template-columns:1fr;gap:18px}
}

/* ===== 顶部导航 ===== */
.mct-nav{position:sticky;top:0;z-index:50;height:var(--nav-h);
  background:rgba(10,22,38,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);display:flex;align-items:center}
.mct-nav-inner{max-width:var(--maxw);margin:0 auto;width:100%;padding:0 16px;
  display:flex;align-items:center;gap:20px}
.mct-brand{font-weight:800;font-size:18px;color:#fff;white-space:nowrap}
.mct-brand b{color:var(--cyan)}
.mct-nav-menu{display:flex;gap:6px;align-items:center;flex-wrap:wrap}
.mct-nav-item{position:relative}
.mct-nav-item>a{display:inline-block;padding:10px 12px;color:var(--muted);font-weight:600;border-radius:8px}
.mct-nav-item>a:hover{color:#fff;background:var(--surface)}
.mct-nav-sub{display:none;position:absolute;top:100%;left:0;min-width:180px;
  background:var(--surface);border:1px solid var(--line);border-radius:10px;
  padding:8px;box-shadow:var(--shadow);z-index:60}
.mct-nav-item:hover .mct-nav-sub,.mct-nav-item:focus-within .mct-nav-sub{display:block}
.mct-nav-sub a{display:block;padding:8px 10px;color:var(--muted);border-radius:8px}
.mct-nav-sub a:hover{color:#fff;background:var(--surface-2)}
.mct-nav-toggle{display:none;margin-left:auto;background:var(--surface);color:#fff;border:1px solid var(--line);
  border-radius:8px;padding:8px 12px;cursor:pointer;font-size:18px}
@media (max-width:1024px){
  .mct-nav-menu{display:none;position:absolute;top:var(--nav-h);left:0;right:0;
    flex-direction:column;background:var(--bg-soft);border-bottom:1px solid var(--line);padding:12px}
  .mct-nav-menu.open{display:flex}
  .mct-nav-sub{position:static;display:block;box-shadow:none;border:none;background:transparent;padding-left:12px}
  .mct-nav-toggle{display:block}
}

/* ===== 面包屑（置于内容列内，padding-left 与 H2 文字左缘严格对齐） ===== */
.mct-breadcrumb{padding-left:var(--h2-inset);margin:0 0 16px;
  font-size:13.5px;color:var(--muted)}
.mct-breadcrumb nav{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.mct-breadcrumb a{color:var(--muted)}
.mct-breadcrumb a:hover{color:var(--cyan)}
.mct-breadcrumb span.sep{color:var(--line);margin:0 2px}
.mct-breadcrumb span.cur{color:var(--text)}

/* ===== 正文主区 ===== */
.mct-content-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 16px;box-shadow:var(--shadow);min-width:0}
.mct-content-main{max-width:760px;margin:0 auto;width:100%}
.mct-summary-box{background:linear-gradient(135deg,rgba(31,182,201,.14),rgba(244,169,59,.06));
  border:1px solid var(--line);border-radius:12px;padding:18px 20px;margin:0 0 22px;
  color:#e8f3f7}
.mct-keywords{margin:14px 0;display:flex;flex-wrap:wrap;gap:8px}
.mct-tag{background:var(--surface-2);border:1px solid var(--line);color:var(--cyan-soft);
  padding:4px 10px;border-radius:999px;font-size:13px}
.mct-update-time{color:var(--muted);font-size:13.5px;margin:8px 0 18px}
.mct-update-time time{color:var(--cyan-soft)}

/* ===== 表格（[M26] 覆盖全部正文 table） ===== */
.mct-content-main table,.mct-page-wrap table,table.mct-spec{
  width:100%;border-collapse:collapse;margin:18px 0;font-size:14.5px;
  border:1px solid #cbd5e1;background:#0e2236;border-radius:10px;overflow:hidden}
.mct-content-main table th,.mct-page-wrap table th,table.mct-spec th{
  background:#14334e;color:#fff;border:1px solid #cbd5e1;padding:10px 12px;text-align:left;font-weight:700}
.mct-content-main table td,.mct-page-wrap table td,table.mct-spec td{
  border:1px solid #cbd5e1;padding:9px 12px;color:#dceaf2}
.mct-content-main table tr:nth-child(even) td,table.mct-spec tr:nth-child(even) td{background:#102539}

/* ===== 结论块 / callout ===== */
.mct-conclusion{border-left:4px solid var(--amber);background:rgba(244,169,59,.10);
  padding:14px 18px;border-radius:10px;margin:18px 0}
.mct-conclusion ol{margin:8px 0}
.mct-callout{border:1px dashed var(--cyan);background:rgba(31,182,201,.08);
  padding:14px 18px;border-radius:10px;margin:18px 0}
.mct-callout b{color:var(--cyan-soft)}

/* ===== TOC 折叠面板 ===== */
.mct-toc-aside{position:sticky;top:calc(var(--nav-h) + 16px);max-height:calc(100vh - 100px);overflow:auto}
.mct-toc-panel,.mct-cat-panel{border:1px solid var(--line);border-radius:12px;background:var(--surface);
  padding:6px 14px;margin-bottom:14px}
.mct-toc-panel>summary,.mct-cat-panel>summary{cursor:pointer;font-weight:700;color:#fff;
  padding:10px 4px;list-style:none;display:flex;align-items:center;justify-content:space-between}
.mct-toc-panel>summary::-webkit-details-marker{display:none}
.mct-toc-panel>summary::after,.mct-cat-panel>summary::after{content:"▾";color:var(--cyan);transition:transform .2s}
.mct-toc-panel[open]>summary::after,.mct-cat-panel[open]>summary::after{transform:rotate(180deg)}
.mct-toc-panel ol,.mct-cat-panel ul{margin:6px 0 10px;padding-left:20px}
.mct-toc-panel a,.mct-cat-panel a{color:var(--muted);font-size:14px}
.mct-toc-panel a:hover{color:var(--cyan)}

/* ===== 分类侧栏 ===== */
.mct-cat-side{}
.mct-category-list{list-style:none;padding:0;margin:6px 0 10px}
.mct-category-list li{margin:2px 0}
.mct-category-list a{display:block;padding:9px 12px;border-radius:8px;color:var(--muted);
  border:1px solid transparent}
.mct-category-list a:hover,.mct-category-list a.active{background:var(--surface-2);color:#fff;border-color:var(--line)}
.mct-cat-content{min-width:0}
.mct-cat-content h1{margin-top:6px}

/* ===== 卡片网格 ===== */
.mct-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:18px;margin:18px 0}
.mct-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px;
  transition:transform .15s,border-color .15s;box-shadow:var(--shadow)}
.mct-card:hover{transform:translateY(-3px);border-color:var(--cyan)}
.mct-card h3{margin:0 0 8px;font-size:17px}
.mct-card h3 a{color:#fff}
.mct-card p{color:var(--muted);font-size:14px;margin:0 0 10px}
.mct-card .mct-cat-tag{font-size:12px;color:var(--amber)}
.mct-card .mct-read{font-size:13px;color:var(--cyan)}

/* ===== FAQ（裸 details） ===== */
.mct-content-main details,.mct-page-wrap details{background:var(--surface-2);border:1px solid var(--line);
  border-radius:10px;padding:0 16px;margin:12px 0}
.mct-content-main details summary,.mct-page-wrap details summary{cursor:pointer;font-weight:700;
  color:#fff;padding:14px 0;list-style:none;display:flex;justify-content:space-between;align-items:center}
.mct-content-main details summary::-webkit-details-marker{display:none}
.mct-content-main details summary::after,.mct-page-wrap details summary::after{content:"+";color:var(--cyan);font-size:20px}
.mct-content-main details[open] summary::after,.mct-page-wrap details[open] summary::after{content:"−"}
.mct-content-main details[open] summary{border-bottom:1px solid var(--line);margin-bottom:10px}
.mct-content-main details p{padding-bottom:6px}

/* ===== 悬浮胶囊 ===== */
.mct-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:80;
  display:flex;flex-direction:column;gap:10px}
.mct-float button,.mct-float a{width:auto;min-width:48px;height:48px;border-radius:24px;
  border:none;cursor:pointer;display:flex;align-items:center;gap:8px;padding:0 14px;
  font-size:14px;font-weight:700;color:#06121f;background:linear-gradient(135deg,var(--cyan),var(--cyan-soft));
  box-shadow:var(--shadow);white-space:nowrap;justify-content:center}
.mct-float .mct-float-mail{background:linear-gradient(135deg,var(--amber),#ffcf7a)}
.mct-float .mct-float-card{background:linear-gradient(135deg,#5aa9ff,#9ed0ff)}
.mct-float button span,.mct-float a span{display:inline}
@media (max-width:600px){.mct-float button,.mct-float a{padding:0;min-width:44px;width:44px}
  .mct-float button span,.mct-float a span{display:none}}
.mct-card-pop{position:fixed;inset:0;background:rgba(3,8,16,.78);display:none;
  align-items:center;justify-content:center;z-index:200}
.mct-card-pop.open{display:flex}
.mct-card-pop img{max-height:90vh;border-radius:12px;box-shadow:var(--shadow)}
.mct-card-pop .mct-card-close{position:absolute;top:20px;right:24px;color:#fff;font-size:30px;
  background:none;border:none;cursor:pointer}

/* ===== 页脚 ===== */
.mct-footer{margin-top:48px;border-top:1px solid var(--line);background:var(--bg-soft);padding:32px 0}
.mct-footer .mct-container{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:24px}
.mct-footer h4{color:var(--cyan);font-size:15px;margin:0 0 12px}
.mct-footer a{color:var(--muted);display:block;margin:6px 0;font-size:14px}
.mct-footer a:hover{color:var(--cyan)}
.mct-footer .mct-copy{grid-column:1/-1;border-top:1px solid var(--line-soft);margin-top:12px;
  padding-top:16px;color:var(--muted);font-size:13px}
@media (max-width:760px){.mct-footer .mct-container{grid-template-columns:1fr}}

/* ===== 首页 hero ===== */
.mct-hero{position:relative;overflow:hidden;padding:72px 16px 56px;text-align:center}
.mct-hero h1{font-size:42px;margin:0 0 16px;color:#fff}
.mct-hero h1 b{color:var(--cyan)}
.mct-hero p{color:var(--muted);font-size:18px;max-width:760px;margin:0 auto 22px}
.mct-hero .mct-hero-cta{display:inline-flex;gap:14px;flex-wrap:wrap;justify-content:center}
.mct-btn{display:inline-block;padding:12px 22px;border-radius:999px;font-weight:700}
.mct-btn-primary{background:linear-gradient(135deg,var(--cyan),var(--cyan-soft));color:#06121f}
.mct-btn-ghost{border:1px solid var(--cyan);color:var(--cyan)}
.mct-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:var(--maxw);
  margin:0 auto;padding:24px 16px}
.mct-stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center}
.mct-stat b{display:block;font-size:26px;color:var(--cyan)}
.mct-stat span{color:var(--muted);font-size:13.5px}
@media (max-width:760px){.mct-stats{grid-template-columns:repeat(2,1fr)}.mct-hero h1{font-size:30px}}
.mct-section{max-width:var(--maxw);margin:0 auto;padding:14px 16px}
.mct-section h2{border:none;padding:0;color:#fff;font-size:24px;margin:8px 0 18px}
.mct-pill{display:inline-block;background:var(--surface-2);border:1px solid var(--line);
  color:var(--cyan-soft);border-radius:999px;padding:8px 16px;margin:6px;font-size:14px}
.mct-rel{border-top:1px solid var(--line);margin-top:24px;padding-top:14px}
.mct-rel ul{list-style:none;padding:0}
.mct-rel li{margin:10px 0;padding-left:18px;position:relative}
.mct-rel li::before{content:"→";color:var(--cyan);position:absolute;left:0}