/* style.css —— 车载雷达标准选型与RFQ库 原创设计体系（std- 前缀，墨青 + 碧玉 + 认证金） */
:root{
  --ink:#0D2B33;          /* 墨青：顶栏/页脚/表头 */
  --teal:#14424D;         /* 深青：次级面 */
  --jade:#16A085;         /* 碧玉：主强调 */
  --jade-l:#48C7AC;       /* 浅碧玉 */
  --gold:#B98A2E;         /* 认证金：标准徽章 */
  --bg:#F2F6F5;
  --ink2:#17252B;
  --muted:#5B6E74;
  --line:#D5E0DE;
  --h2-inset:0px;         /* 面包屑与 H2 左缘对齐基准（M18c++）*/
  --page-inset:48px;
  --header-h:60px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink2);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;
}
a{color:var(--teal);text-decoration:none;}
a:hover{color:var(--jade);}
img{max-width:100%;}
h1,h2,h3,h4{line-height:1.35;color:var(--ink);}
h1{font-size:28px;margin:0 0 12px;}
h2{font-size:22px;margin:32px 0 12px;}
h3{font-size:18px;margin:22px 0 10px;}

/* ---------- 顶栏 ---------- */
.std-header{position:sticky;top:0;z-index:40;background:var(--ink);color:#fff;border-bottom:2px solid var(--jade);}
.std-header-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:var(--header-h);display:flex;align-items:center;gap:18px;}
.std-logo{color:#fff;font-weight:700;font-size:18px;white-space:nowrap;display:flex;align-items:center;gap:9px;}
.std-logo-mark{width:18px;height:18px;border-radius:4px;background:linear-gradient(135deg,var(--jade),var(--jade-l));position:relative;flex:none;}
.std-logo-mark::after{content:"";position:absolute;left:4px;top:8px;width:9px;height:5px;border-left:2.4px solid var(--ink);border-bottom:2.4px solid var(--ink);transform:rotate(-45deg);}
.std-nav{display:flex;align-items:center;gap:4px;flex:1;}
.std-nav>a,.std-nav-group>summary{
  color:#D9E8E5;padding:8px 12px;border-radius:8px;cursor:pointer;font-size:15px;list-style:none;
}
.std-nav>a:hover,.std-nav-group>summary:hover{background:rgba(22,160,133,.22);color:#fff;}
.std-nav-group{position:relative;}
.std-nav-group>summary::-webkit-details-marker{display:none;}
.std-nav-sub{position:absolute;top:100%;left:0;background:#fff;color:var(--ink2);min-width:168px;border-radius:8px;
  box-shadow:0 8px 24px rgba(13,43,51,.2);padding:6px;display:none;}
.std-nav-group[open]>.std-nav-sub{display:block;}
.std-nav-sub a{display:block;padding:8px 12px;border-radius:6px;color:var(--ink2);font-size:14px;}
.std-nav-sub a:hover{background:var(--bg);color:var(--teal);}
.std-nav-toggle{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer;margin-left:auto;}

/* ---------- 容器与面包屑 ---------- */
.std-container{max-width:1200px;margin:0 auto;padding:0 24px;}
.std-breadcrumb{font-size:13px;color:var(--muted);padding:14px 0 0;margin:0 0 6px var(--h2-inset);}
.std-breadcrumb a{color:var(--muted);}
.std-breadcrumb a:hover{color:var(--jade);}
.std-breadcrumb-inset{padding-left:var(--page-inset);}
.std-crumb-sep{margin:0 8px;color:#9FB4B0;}
.std-crumb-current{color:var(--ink);font-weight:600;}

/* ---------- 详情页栅格（内容在前，TOC 240px 居右）---------- */
.std-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:start;padding:8px 0 40px;}
.std-content-main{min-width:0;}
.std-content-main p{margin:12px 0;}
.std-content-main ul,.std-content-main ol{padding-left:22px;}
.std-update{font-size:13px;color:var(--muted);margin:0 0 8px;}
.std-keywords{font-size:13px;color:var(--teal);background:rgba(22,160,133,.09);padding:6px 12px;border-radius:8px;display:inline-block;margin:0 0 14px;}
.std-prod-meta{display:flex;gap:10px;flex-wrap:wrap;margin:0 0 12px;}
.std-prod-series,.std-prod-status{font-size:13px;background:rgba(22,160,133,.1);color:var(--teal);border:1px solid rgba(22,160,133,.3);padding:4px 12px;border-radius:20px;}

/* TOC 悬浮（sticky，非 fixed）*/
.std-toc-aside{position:sticky;top:calc(var(--header-h) + 16px);max-height:calc(100vh - var(--header-h) - 32px);overflow:auto;}
.std-toc-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;}
.std-toc-panel>summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;position:relative;padding-right:18px;}
.std-toc-panel>summary::-webkit-details-marker{display:none;}
.std-toc-panel>summary::after{content:"";position:absolute;right:2px;top:8px;border:5px solid transparent;border-top-color:var(--jade);transition:transform .2s;}
.std-toc-panel[open]>summary::after{transform:rotate(180deg);border-top-color:transparent;border-bottom-color:var(--jade);top:3px;}
.std-toc-panel nav a{display:block;padding:5px 0;color:var(--muted);font-size:14px;border-left:2px solid var(--line);padding-left:10px;}
.std-toc-panel nav a:hover{color:var(--jade);border-left-color:var(--jade);}
.std-toc-l3{padding-left:22px !important;font-size:13px;}

/* ---------- 列表页栅格（侧栏在前 → 240px 居左，内容 1fr）---------- */
.std-list-layout{padding:8px 0 40px;}
.std-list-layout .std-layout-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:28px;align-items:start;}
.std-cat-side{position:sticky;top:calc(var(--header-h) + 16px);}
.std-cat-panel{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;}
.std-cat-panel>summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;position:relative;padding-right:18px;}
.std-cat-panel>summary::-webkit-details-marker{display:none;}
.std-cat-panel>summary::after{content:"";position:absolute;right:2px;top:7px;border:5px solid transparent;border-top-color:var(--jade);transition:transform .2s;}
.std-cat-panel[open]>summary::after{transform:rotate(180deg);border-top-color:transparent;border-bottom-color:var(--jade);top:2px;}
.std-category-list{list-style:none;margin:8px 0 0;padding:0;}
.std-category-list li{margin:2px 0;}
.std-category-list a{display:block;padding:8px 12px;border-radius:8px;color:var(--ink2);font-size:15px;}
.std-category-list a:hover{background:var(--bg);}
.std-category-list a.active{background:var(--ink);color:#fff;}
.std-side-note{margin-top:14px;font-size:13px;color:var(--muted);line-height:1.7;}
.std-cat-content h1{font-size:26px;}
.std-list-desc{color:var(--muted);margin:6px 0 18px;}
.std-item-list{list-style:none;margin:0;padding:0;}
.std-item{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:14px;border-left:3px solid var(--jade);}
.std-item-title{font-size:18px;margin:0 0 6px;}
.std-item p{margin:0;color:var(--muted);font-size:14px;}
.std-pagination{display:flex;gap:8px;margin-top:18px;}
.std-pagination a{padding:6px 12px;border:1px solid var(--line);border-radius:8px;color:var(--teal);}
.std-pagination a.current{background:var(--ink);color:#fff;border-color:var(--ink);}

/* ---------- 表格（覆盖正文全部 table，含 Markdown 裸 table）---------- */
table.std-spec,.std-content-main table,.std-page-main table{
  border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;background:#fff;
}
table.std-spec th,table.std-spec td,.std-content-main table th,.std-content-main table td,
.std-page-main table th,.std-page-main table td{
  border:1px solid #b9c8c4;padding:9px 12px;text-align:left;vertical-align:top;
}
table.std-spec thead th,.std-content-main table thead th,.std-page-main table thead th{
  background:var(--ink);color:#fff;font-weight:600;
}
table.std-spec tbody tr:nth-child(even) td,.std-content-main table tbody tr:nth-child(even) td,
.std-page-main table tbody tr:nth-child(even) td{background:#EAF3F0;}

/* ---------- FAQ（裸 details）---------- */
.std-faq-block{margin:28px 0;border-top:1px solid var(--line);padding-top:14px;}
.std-faq-block h2{font-size:20px;}
.std-faq-block details{border:1px solid var(--line);border-radius:10px;margin:8px 0;background:#fff;overflow:hidden;}
.std-faq-block summary{cursor:pointer;padding:12px 14px;font-weight:600;color:var(--ink);list-style:none;}
.std-faq-block summary::-webkit-details-marker{color:var(--jade);}
.std-faq-block details[open] summary{border-bottom:1px solid var(--line);background:rgba(22,160,133,.07);}
.std-faq-block details p{padding:10px 14px;margin:0;color:var(--ink2);}

/* ---------- 页面（叶子页）---------- */
.std-page-wrap{padding:8px 0 40px;}
.std-page-main{max-width:860px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:var(--page-inset);}
.std-page-title{font-size:26px;}
.std-page-lead{color:var(--muted);margin:6px 0 18px;}
.std-404{text-align:center;padding:60px 0;}
.std-404-links{display:flex;gap:14px;justify-content:center;}

/* ---------- 按钮 ---------- */
.std-btn{display:inline-block;padding:11px 22px;border-radius:10px;border:1px solid var(--ink);color:var(--ink);font-weight:600;}
.std-btn-primary{background:linear-gradient(135deg,var(--jade),var(--teal));border-color:var(--jade);color:#fff;}
.std-btn:hover{opacity:.92;color:#fff;}
.std-btn:not(.std-btn-primary):hover{background:var(--ink);}

/* ---------- 首页 ---------- */
.std-hero{display:flex;align-items:center;gap:36px;padding:44px 0 30px;flex-wrap:wrap;}
.std-hero-text{flex:1 1 400px;}
.std-hero-eyebrow{font-size:14px;font-weight:700;letter-spacing:2px;color:var(--jade);margin:0 0 10px;}
.std-hero-sub{font-size:17px;color:var(--muted);margin:12px 0 22px;}
.std-hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.std-hero-art{flex:0 0 260px;text-align:center;}
.std-matrix{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;}
.std-mx-cell{aspect-ratio:1/1;border:2px solid var(--teal);border-radius:6px;background:rgba(20,66,77,.05);}
.std-mx-hot{background:var(--jade);border-color:var(--jade);}
.std-mx-hot2{background:var(--jade-l);border-color:var(--jade-l);}
.std-mx-seal{position:relative;border-color:var(--gold);}
.std-mx-seal::after{content:"";position:absolute;left:50%;top:50%;width:14px;height:14px;border-radius:50%;background:var(--gold);transform:translate(-50%,-50%);}
.std-hero-art-cap{font-size:13px;color:var(--muted);margin:12px 0 0;}
.std-band{padding:34px 0;border-top:1px solid var(--line);}
.std-band-alt{background:#fff;border-radius:16px;margin:0 0 8px;}
.std-sec-title{font-size:24px;margin:0 0 8px;}
.std-sec-lead{color:var(--muted);margin:0 0 20px;}
.std-baseline{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.std-baseline-item{background:#fff;border:1px solid var(--line);border-left:4px solid var(--jade);border-radius:10px;padding:16px 18px;}
.std-baseline-item h3{margin:0 0 6px;font-size:17px;}
.std-baseline-item p{margin:0;color:var(--muted);font-size:14px;}
.std-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.std-card{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;transition:transform .15s,box-shadow .15s;}
.std-card:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(13,43,51,.14);color:var(--ink2);}
.std-card h3{margin:0 0 8px;font-size:18px;}
.std-card p{margin:0;color:var(--muted);font-size:14px;}
.std-tags{display:flex;flex-wrap:wrap;gap:10px;}
.std-tag{background:rgba(22,160,133,.12);color:#0E6E5C;border:1px solid rgba(22,160,133,.4);padding:7px 14px;border-radius:20px;font-size:14px;font-weight:600;}
.std-feat-wrap{display:grid;grid-template-columns:1fr 1fr;gap:28px;}
.std-feat-col h2{font-size:22px;}
.std-feat-list{list-style:none;margin:0;padding:0;}
.std-feat-list li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:12px;}
.std-feat-list a{font-weight:600;font-size:16px;}
.std-feat-list p{margin:8px 0 0;color:var(--muted);font-size:14px;}
.std-more{margin:10px 0 0;}
.std-more a{color:var(--jade);font-weight:600;}
.std-cta{background:linear-gradient(135deg,var(--ink),var(--teal));color:#fff;border-radius:16px;padding:36px;margin:34px 0;text-align:center;}
.std-cta h2,.std-cta .std-cta-title{color:#fff;margin:0 0 10px;}
.std-cta p{color:#CFE3DE;margin:0 0 18px;}

/* ---------- 归档 ---------- */
.std-arch-sec{margin-bottom:26px;}
.std-archive-list{columns:2;column-gap:28px;list-style:none;padding:0;margin:6px 0 18px;}
.std-archive-list li{break-inside:avoid;padding:4px 0;}

/* ---------- 页脚 ---------- */
.std-footer{background:var(--ink);color:#CFDAE8;margin-top:30px;}
.std-footer-inner{max-width:1200px;margin:0 auto;padding:34px 24px;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.6fr;gap:24px;}
.std-footer h3{color:#fff;font-size:17px;margin:0 0 8px;}
.std-footer h4{color:#fff;font-size:15px;margin:0 0 8px;}
.std-footer a{display:block;color:#CFDAE8;padding:3px 0;}
.std-footer a:hover{color:var(--jade-l);}
.std-footer-note{font-size:13px;line-height:1.7;}
.std-footer-bar{border-top:1px solid rgba(255,255,255,.1);text-align:center;padding:14px;font-size:13px;color:#9FB0C4;}

/* ---------- 悬浮胶囊（彩色长胶囊：名片 / 邮箱 / 顶部）---------- */
.std-capsule{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:50;display:flex;flex-direction:column;gap:8px;
  background:linear-gradient(160deg,var(--ink),var(--teal) 55%,var(--jade));padding:10px;border-radius:30px;box-shadow:0 10px 28px rgba(13,43,51,.38);}
.std-cap-btn{display:flex;flex-direction:column;align-items:center;gap:2px;width:48px;height:48px;justify-content:center;
  background:var(--jade);color:#fff;border:0;border-radius:50%;cursor:pointer;font-size:12px;font-weight:700;}
.std-cap-btn:hover{filter:brightness(1.1);}
.std-cap-btn svg{display:block;}
.std-card-pop{position:fixed;inset:0;background:rgba(13,43,51,.66);display:flex;align-items:center;justify-content:center;z-index:100;padding:20px;}
.std-card-pop[hidden]{display:none;}
.std-card-pop-inner{position:relative;background:#fff;border-radius:12px;padding:8px;max-height:92vh;overflow:auto;}
.std-card-pop-inner img{display:block;width:auto;height:auto;max-height:86vh;max-width:90vw;}
.std-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:0;background:var(--ink);color:#fff;font-size:20px;cursor:pointer;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .std-layout-grid,.std-list-layout .std-layout-grid{grid-template-columns:1fr;}
  .std-toc-aside,.std-cat-side{position:static;max-height:none;}
  .std-card-grid{grid-template-columns:repeat(2,1fr);}
  .std-baseline,.std-feat-wrap{grid-template-columns:1fr;}
  .std-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;flex-direction:column;background:var(--ink);padding:10px;gap:4px;border-bottom:2px solid var(--jade);}
  .std-nav.std-nav-open{display:flex;}
  .std-nav-toggle{display:block;}
  .std-nav-group{position:static;}
  .std-nav-sub{position:static;display:block;background:transparent;box-shadow:none;padding:0 0 0 12px;}
  .std-nav-sub a{color:#D9E8E5;}
}
@media (max-width:640px){
  .std-card-grid{grid-template-columns:1fr;}
  .std-archive-list{columns:1;}
  .std-footer-inner{grid-template-columns:1fr;}
  .std-page-main{padding:24px;}
  .std-breadcrumb-inset{padding-left:24px;}
  .std-capsule{right:8px;}
  .std-hero-art{flex:1 1 220px;}
}