/* ===========================================================
   connector.车载雷达.公司  —  独立原创样式（crd- 前缀）
   配色：深空墨蓝黑 #0B1020 + 信号青 #1FD0C5 + 雷达金 #E7B45A
   =========================================================== */
:root{
  --crd-bg:#0B1020;
  --crd-bg-2:#0F1830;
  --crd-surface:#152039;
  --crd-surface-2:#1B294A;
  --crd-text:#E7EDF7;
  --crd-muted:#9DB0CC;
  --crd-line:#27324D;
  --crd-cyan:#1FD0C5;
  --crd-cyan-soft:rgba(31,208,197,.12);
  --crd-gold:#E7B45A;
  --crd-gold-soft:rgba(231,180,90,.12);
  --crd-radius:14px;
  --crd-maxw:1180px;
  --h2-inset:16px;            /* 面包屑与 H2 文字左缘对齐基准 */
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body.crd-body{
  margin:0;background:linear-gradient(180deg,#0B1020 0%,#0C1326 100%);
  color:var(--crd-text);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;
}
a{color:var(--crd-cyan);text-decoration:none;}
a:hover{color:var(--crd-gold);}
img{max-width:100%;}
h1,h2,h3,h4{line-height:1.35;color:#fff;font-weight:700;letter-spacing:.2px;}
h1{font-size:30px;margin:0 0 18px;}
.crd-page-title{padding-left:var(--h2-inset);margin:4px 0 18px;}
h2{font-size:23px;margin:34px 0 14px;padding-left:var(--h2-inset);scroll-margin-top:90px;}
h3{font-size:18px;margin:22px 0 10px;padding-left:var(--h2-inset);}
p{margin:0 0 16px;padding-left:var(--h2-inset);}
ul,ol{margin:0 0 16px;padding-left:calc(var(--h2-inset) + 22px);}
li{margin:6px 0;}

/* ---------- 顶栏 ---------- */
.crd-header{position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(11,16,32,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--crd-line);}
.crd-header-inner{max-width:var(--crd-maxw);margin:0 auto;padding:0 22px;
  height:64px;display:flex;align-items:center;justify-content:space-between;}
.crd-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;}
.crd-brand-mark{width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--crd-cyan),var(--crd-gold));color:#0B1020;font-weight:800;}
.crd-brand-text{font-size:16px;}
.crd-nav-list{display:flex;gap:6px;list-style:none;margin:0;padding:0;}
.crd-nav-item{position:relative;}
.crd-nav-item>a{display:block;padding:10px 14px;color:var(--crd-muted);border-radius:8px;font-size:15px;}
.crd-nav-item>a:hover{background:var(--crd-surface);color:#fff;}
.crd-nav-sub{position:absolute;top:100%;left:0;min-width:200px;background:var(--crd-surface);
  border:1px solid var(--crd-line);border-radius:10px;padding:8px;display:none;flex-direction:column;
  box-shadow:0 14px 40px rgba(0,0,0,.45);}
.crd-nav-item:hover .crd-nav-sub,.crd-nav-item:focus-within .crd-nav-sub{display:flex;}
.crd-nav-sub a{padding:8px 12px;border-radius:7px;color:var(--crd-muted);font-size:14px;}
.crd-nav-sub a:hover{background:var(--crd-surface-2);color:#fff;}
.crd-nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;}
.crd-nav-toggle span{width:24px;height:2px;background:#fff;display:block;border-radius:2px;}

/* ---------- 外壳与栅格 ---------- */
.crd-shell{max-width:var(--crd-maxw);margin:0 auto;padding:84px 22px 40px;}
.crd-layout-grid{display:grid;gap:34px;}
.crd-article-layout .crd-layout-grid,
.crd-product-layout .crd-layout-grid{grid-template-columns:minmax(0,1fr) 240px;}
.crd-list-layout .crd-layout-grid{grid-template-columns:240px minmax(0,1fr);}
.crd-page-wrap,
.crd-home{padding-left:0;}
.crd-page-wrap{--h2-inset:48px;}

/* ---------- 面包屑 ---------- */
.crd-crumb{padding:10px 0 6px;margin-bottom:8px;}
.crd-crumb-list{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0 0 0 var(--h2-inset);
  font-size:13.5px;color:var(--crd-muted);}
.crd-crumb-list li{position:relative;padding-right:14px;}
.crd-crumb-list li:not(:last-child)::after{content:"›";position:absolute;right:2px;color:var(--crd-line);}
.crd-crumb-list a{color:var(--crd-muted);}
.crd-crumb-list a:hover{color:var(--crd-cyan);}

/* ---------- 正文容器 ---------- */
.crd-content-main{background:var(--crd-bg-2);border:1px solid var(--crd-line);border-radius:var(--crd-radius);
  padding:30px 8px 36px;min-width:0;}
.crd-summary-block{background:var(--crd-cyan-soft);border-left:3px solid var(--crd-cyan);
  border-radius:10px;padding:16px 20px;margin:0 0 22px;padding-left:var(--h2-inset);color:#DFF7F4;}
.crd-keywords{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 20px;padding-left:var(--h2-inset);}
.crd-keywords .tag-text{background:var(--crd-surface);border:1px solid var(--crd-line);color:var(--crd-muted);
  padding:4px 12px;border-radius:999px;font-size:13px;}
.crd-update-time{font-size:13px;color:var(--crd-muted);padding-left:var(--h2-inset);margin-bottom:18px;}

/* ---------- 表格（[M26] 覆盖全部正文 table） ---------- */
.crd-content-main table,table.crd-spec{width:100%;border-collapse:collapse;margin:18px 0 22px;
  font-size:14.5px;background:var(--crd-surface);border:1px solid #cbd5e1;}
.crd-content-main table th,table.crd-spec th{background:#13233f;color:#fff;text-align:left;
  padding:11px 14px;border:1px solid #cbd5e1;font-weight:600;}
.crd-content-main table td,table.crd-spec td{padding:10px 14px;border:1px solid #cbd5e1;color:var(--crd-text);}
.crd-content-main table tr:nth-child(even) td,table.crd-spec tr:nth-child(even) td{background:#101a31;}

/* ---------- 结论块 / 实践经验 ---------- */
.crd-conclusion{background:var(--crd-gold-soft);border-left:3px solid var(--crd-gold);border-radius:10px;
  padding:16px 20px;margin:22px 0;padding-left:var(--h2-inset);}
.crd-conclusion h3,.crd-conclusion h4{color:var(--crd-gold);padding-left:0;margin-top:0;}
.crd-case{background:rgba(31,208,197,.08);border:1px solid var(--crd-line);border-radius:10px;
  padding:16px 20px;margin:22px 0;padding-left:var(--h2-inset);}
.crd-case .crd-case-title{color:var(--crd-cyan);font-weight:700;margin-bottom:8px;}

/* ---------- FAQ（裸 details） ---------- */
.crd-content-main details{background:var(--crd-surface);border:1px solid var(--crd-line);border-radius:10px;
  margin:12px 0;padding:0 var(--h2-inset);}
.crd-content-main details summary{cursor:pointer;padding:14px 0;font-weight:600;color:#fff;
  list-style:none;display:flex;justify-content:space-between;align-items:center;}
.crd-content-main details summary::-webkit-details-marker{display:none;}
.crd-content-main details summary::after{content:"+";color:var(--crd-cyan);font-size:20px;}
.crd-content-main details[open] summary::after{content:"−";}
.crd-content-main details p{padding-left:0;color:var(--crd-muted);}

/* ---------- 相关阅读 / 相关产品 ---------- */
.crd-related{margin-top:26px;border-top:1px solid var(--crd-line);padding-top:18px;padding-left:var(--h2-inset);}
.crd-related h3{padding-left:0;color:var(--crd-cyan);}
.crd-related ul{padding-left:20px;}
.crd-related li{color:var(--crd-muted);margin:8px 0;}

/* ---------- 目录 / 分类折叠面板（[M25] 原生 details） ---------- */
.crd-toc-aside{position:sticky;top:84px;align-self:start;max-height:calc(100vh - 104px);overflow:auto;}
.crd-cat-side{align-self:start;position:sticky;top:84px;}
.crd-toc-panel,.crd-cat-panel{border:1px solid var(--crd-line);background:var(--crd-bg-2);border-radius:12px;padding:6px 14px;}
.crd-toc-panel summary,.crd-cat-panel summary{cursor:pointer;padding:12px 0;font-weight:700;color:#fff;list-style:none;
  display:flex;justify-content:space-between;align-items:center;}
.crd-toc-panel summary::-webkit-details-marker,.crd-cat-panel summary::-webkit-details-marker{display:none;}
.crd-toc-panel summary::after,.crd-cat-panel summary::after{content:"▾";color:var(--crd-cyan);}
.crd-toc-panel[open] summary::after,.crd-cat-panel[open] summary::after{content:"▴";}
.crd-toc-list,.category-list{list-style:none;margin:0;padding:6px 0 10px;}
.crd-toc-list li a,.category-list li a{display:block;padding:7px 10px;border-radius:7px;color:var(--crd-muted);font-size:14px;}
.crd-toc-list li a:hover,.category-list li a:hover{background:var(--crd-surface);color:#fff;}
.category-list li a.active{background:var(--crd-cyan-soft);color:var(--crd-cyan);font-weight:600;}

/* ---------- 列表卡片 ---------- */
.crd-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px;}
.crd-card{background:var(--crd-surface);border:1px solid var(--crd-line);border-radius:12px;padding:18px;transition:.2s;}
.crd-card:hover{border-color:var(--crd-cyan);transform:translateY(-3px);}
.crd-card h3{margin:0 0 8px;font-size:17px;padding-left:0;}
.crd-card .crd-card-meta{font-size:13px;color:var(--crd-muted);}
.crd-card .crd-card-desc{font-size:14px;color:var(--crd-muted);margin-top:8px;}
.crd-list-intro{margin-bottom:20px;color:var(--crd-muted);}

/* ---------- 悬浮胶囊 ---------- */
.crd-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.crd-float-btn{width:54px;height:54px;border-radius:999px;border:0;cursor:pointer;
  background:linear-gradient(135deg,var(--crd-cyan),var(--crd-gold));color:#0B1020;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;
  box-shadow:0 8px 24px rgba(0,0,0,.4);font-weight:700;font-size:11px;}
.crd-float-btn:hover{filter:brightness(1.08);}
.crd-float-ico{font-size:18px;line-height:1;}
.crd-float-mail{background:linear-gradient(135deg,var(--crd-gold),#f0c98a);}
.crd-card-pop{position:fixed;inset:0;z-index:80;background:rgba(4,8,16,.78);
  display:grid;place-items:center;padding:20px;}
.crd-card-pop[hidden]{display:none;}
.crd-card-pop-inner{position:relative;background:#fff;border-radius:12px;padding:10px;max-width:92vw;}
.crd-card-img{max-height:80vh;width:auto;display:block;}
.crd-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;
  border:0;background:#fff;color:#0B1020;font-size:20px;cursor:pointer;box-shadow:0 4px 12px rgba(0,0,0,.4);}

/* ---------- 页脚 ---------- */
.crd-footer{background:#070B16;border-top:1px solid var(--crd-line);margin-top:40px;}
.crd-footer-inner{max-width:var(--crd-maxw);margin:0 auto;padding:34px 22px;display:grid;
  grid-template-columns:1.6fr 1fr 1fr;gap:24px;}
.crd-foot-title{color:#fff;font-weight:700;margin-bottom:12px;}
.crd-foot-desc{color:var(--crd-muted);font-size:14px;}
.crd-foot-col ul{list-style:none;padding:0;margin:0;}
.crd-foot-col li{margin:7px 0;}
.crd-footer-bar{max-width:var(--crd-maxw);margin:0 auto;padding:14px 22px;color:var(--crd-muted);font-size:13px;
  border-top:1px solid var(--crd-line);}

/* ---------- 首页 ---------- */
.crd-hero{background:radial-gradient(1200px 400px at 30% -10%,rgba(31,208,197,.18),transparent),
  linear-gradient(180deg,#0F1830,#0B1020);border:1px solid var(--crd-line);border-radius:18px;
  padding:46px 30px;margin-bottom:30px;}
.crd-hero h1{font-size:36px;padding-left:0;}
.crd-hero p{color:var(--crd-muted);padding-left:0;font-size:17px;max-width:760px;}
.crd-section{margin:30px 0;}
.crd-section-title{font-size:24px;color:#fff;margin:0 0 16px;padding-left:0;
  border-left:4px solid var(--crd-cyan);padding-left:14px;}
.crd-pill-row{display:flex;flex-wrap:wrap;gap:10px;}
.crd-pill{background:var(--crd-surface);border:1px solid var(--crd-line);border-radius:999px;
  padding:8px 16px;font-size:14px;color:var(--crd-muted);}
.crd-baseline-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:16px;}
.crd-baseline-card{background:var(--crd-surface);border:1px solid var(--crd-line);border-radius:12px;padding:16px;}
.crd-baseline-card h4{margin:0 0 8px;color:var(--crd-cyan);font-size:16px;}
.crd-baseline-card p{margin:0;padding-left:0;font-size:14px;color:var(--crd-muted);}
.crd-scene-row{display:flex;flex-wrap:wrap;gap:12px;}
.crd-scene{background:var(--crd-cyan-soft);border:1px solid var(--crd-line);border-radius:10px;padding:12px 16px;
  color:#DFF7F4;font-size:14.5px;}

/* ---------- 响应式（[M25] 断点 1024） ---------- */
@media (max-width:1024px){
  .crd-nav{display:none;position:absolute;top:64px;left:0;right:0;background:rgba(11,16,32,.97);
    border-bottom:1px solid var(--crd-line);padding:10px 22px;}
  .crd-nav.open{display:block;}
  .crd-nav-list{flex-direction:column;gap:0;}
  .crd-nav-sub{position:static;display:flex;box-shadow:none;border:0;background:transparent;padding-left:14px;}
  .crd-nav-toggle{display:flex;}
  .crd-article-layout .crd-layout-grid,
  .crd-product-layout .crd-layout-grid,
  .crd-list-layout .crd-layout-grid{grid-template-columns:1fr;}
  .crd-toc-aside,.crd-cat-side{position:static;max-height:none;}
  .crd-footer-inner{grid-template-columns:1fr;}
  .crd-hero h1{font-size:28px;}
}
@media (max-width:600px){
  h1{font-size:24px;} h2{font-size:20px;}
  .crd-shell{padding:78px 14px 30px;}
}