:root{
  --nav-h: 64px;
  --bg: #f5f7fb;
  --bg-soft: #eef2f8;
  --ink: #0f1d33;
  --ink-2: #3a4a63;
  --muted: #6b7a93;
  --line: #e2e8f2;
  --brand: #1452e6;
  --brand-2: #00c2d4;
  --accent: #00e0c6;
  --dark: #0b1730;
  --dark-2: #112347;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(15,29,51,.08);
  --maxw: 1180px;
  --content: 1120px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;font-family:"Segoe UI","Microsoft YaHei","PingFang SC",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased;
  padding-top:var(--nav-h);
}
a{color:var(--brand);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}
h1,h2,h3,h4{line-height:1.3;color:var(--ink);font-weight:700;}
h1{font-size:30px;margin:.2em 0 .4em;}
h2{font-size:23px;margin:1.8em 0 .6em;padding-top:.2em;border-top:1px solid var(--line);}
h3{font-size:18px;margin:1.4em 0 .5em;}
p{margin:.6em 0;color:var(--ink-2);}
ul,ol{padding-left:1.4em;}
li{margin:.3em 0;}

/* ───── 固定顶栏 ───── */
.site-header{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:50;
  background:rgba(11,23,48,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08);}
.header-inner{max-width:var(--maxw);margin:0 auto;height:100%;padding:0 20px;
  display:flex;align-items:center;gap:22px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:17px;white-space:nowrap;}
.brand-mark{width:22px;height:22px;border-radius:6px;
  background:linear-gradient(135deg,var(--brand),var(--accent));box-shadow:0 0 14px rgba(0,224,198,.5);}
.primary-nav{flex:1;}
.nav-list{display:flex;gap:6px;list-style:none;margin:0;padding:0;}
.nav-list>li{position:relative;}
.nav-list>li>a{display:block;padding:8px 14px;color:#cdd8ee;border-radius:8px;font-size:15px;white-space:nowrap;}
.nav-list>li>a:hover,.nav-list>li>a.active{color:#fff;background:rgba(255,255,255,.08);text-decoration:none;}
.has-mega .mega-panel{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);
  border-radius:10px;box-shadow:var(--shadow);padding:14px 18px;min-width:200px;display:none;}
.has-mega:hover .mega-panel{display:block;}
.mega-col h4{margin:0 0 8px;font-size:13px;color:var(--muted);}
.mega-col ul{list-style:none;padding:0;margin:0;}
.mega-col li a{display:block;padding:6px 4px;color:var(--ink-2);font-size:14px;}
.mega-col li a:hover{color:var(--brand);}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;}
.nav-toggle span{width:24px;height:2px;background:#fff;display:block;}

/* 移动端折叠分类 */
.mobile-cats{display:none;}

/* ───── 容器与面包屑对齐 ───── */
.detail-wrap{max-width:var(--content);margin:0 auto;padding:24px 20px 60px;}
.breadcrumb-row{margin:0 0 10px;}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;font-size:13px;color:var(--muted);}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:8px;color:var(--line);}
.breadcrumb a{color:var(--muted);}
.breadcrumb .current a{color:var(--ink);font-weight:600;}

/* 详情栅格：正文 760 居中 + 右侧 TOC */
.detail-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:40px;align-items:start;}
.detail-main{max-width:760px;}
.body-content{font-size:16px;}
.body-content table.data{width:100%;border-collapse:collapse;margin:1.1em 0;font-size:14px;
  background:#fff;box-shadow:var(--shadow);border-radius:10px;overflow:hidden;}
.body-content table.data th,.body-content table.data td{border:1px solid var(--line);padding:9px 12px;text-align:left;}
.body-content table.data thead th{background:var(--dark);color:#fff;font-weight:600;}
.body-content blockquote{margin:1em 0;padding:12px 16px;background:var(--bg-soft);border-left:4px solid var(--brand-2);border-radius:0 8px 8px 0;color:var(--ink-2);}
.article-meta{display:flex;gap:10px;align-items:center;margin:.2em 0 1em;}
.cat-tag,.status-tag{font-size:12px;padding:3px 10px;border-radius:20px;background:var(--brand);color:#fff;}
.status-tag{background:var(--brand-2);}
.update-line{font-size:13px;color:var(--muted);margin:0 0 1em;}

/* TOC 悬浮（sticky，禁止 fixed） */
.toc-aside{position:sticky;top:calc(var(--nav-h) + 16px);max-height:calc(100vh - var(--nav-h) - 32px);overflow:auto;}
.toc{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);}
.toc-title{margin:0 0 8px;font-size:13px;color:var(--muted);font-weight:700;}
.toc ul{list-style:none;margin:0;padding:0;}
.toc li a{display:block;padding:5px 0;font-size:13px;color:var(--ink-2);border-bottom:1px dashed var(--line);}
.toc li a:hover{color:var(--brand);text-decoration:none;}
.toc .toc-lv3 a{padding-left:14px;font-size:12px;}

/* FAQ 裸 details */
.faq-block{margin:2em 0;}
.faq-block details{border:1px solid var(--line);border-radius:10px;background:#fff;margin:.6em 0;overflow:hidden;}
.faq-block summary{padding:12px 16px;cursor:pointer;font-weight:600;color:var(--ink);background:var(--bg-soft);}
.faq-block details[open] summary{border-bottom:1px solid var(--line);}
.faq-block details p{margin:0;padding:12px 16px;color:var(--ink-2);}

/* ───── 列表页（左分类列表，禁卡片网格）───── */
.list-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:40px;align-items:start;}
.cat-side{position:sticky;top:calc(var(--nav-h) + 16px);}
.cat-side-title{font-size:14px;color:var(--muted);margin:0 0 10px;}
.category-list{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;}
.category-list li a{display:flex;justify-content:space-between;align-items:center;padding:11px 14px;color:var(--ink-2);border-bottom:1px solid var(--line);}
.category-list li:last-child a{border-bottom:0;}
.category-list li.active a,.category-list li a:hover{background:var(--bg-soft);color:var(--brand);text-decoration:none;}
.cat-count{font-size:12px;background:var(--bg-soft);border-radius:10px;padding:1px 8px;color:var(--muted);}
.list-head h1{font-size:26px;}
.list-desc{color:var(--muted);}
.item-list{list-style:none;padding:0;margin:0;}
.item-row{border-bottom:1px solid var(--line);padding:18px 0;}
.item-title{font-size:19px;margin:0 0 4px;color:var(--ink);}
.item-link:hover .item-title{color:var(--brand);text-decoration:none;}
.item-meta{font-size:12px;color:var(--muted);display:flex;gap:12px;margin-bottom:6px;}
.item-sum{margin:0;color:var(--ink-2);}

/* ───── 首页 ───── */
.hero{position:relative;color:#fff;overflow:hidden;}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(1200px 500px at 70% -10%,rgba(0,224,198,.35),transparent),
  linear-gradient(135deg,var(--dark),var(--dark-2));}
.hero-inner{position:relative;max-width:var(--maxw);margin:0 auto;padding:72px 20px 64px;}
.hero-eyebrow{letter-spacing:2px;color:var(--accent);font-size:13px;text-transform:uppercase;margin:0 0 12px;}
.hero-title{font-size:44px;margin:0 0 14px;color:#fff;}
.hero-sub{font-size:20px;margin:0 0 10px;color:#dfe8f7;}
.hero-desc{color:#aebfd8;max-width:720px;}
.hero-actions{margin:22px 0 28px;display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:11px 22px;border-radius:30px;font-weight:600;}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;}
.btn-ghost{border:1px solid rgba(255,255,255,.4);color:#fff;}
.btn:hover{text-decoration:none;transform:translateY(-1px);}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap;list-style:none;padding:0;margin:0;}
.hero-stats li{display:flex;flex-direction:column;}
.hero-stats strong{font-size:24px;color:#fff;}
.hero-stats span{font-size:13px;color:#aebfd8;}

.section{max-width:var(--maxw);margin:0 auto;padding:56px 20px;}
.section-alt{background:#fff;border-radius:24px;box-shadow:var(--shadow);}
.section-head{text-align:center;margin-bottom:30px;}
.section-head h2{font-size:28px;border:0;padding:0;margin:0 0 8px;}
.section-head p{color:var(--muted);margin:0;}
.prod-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;transition:.2s;box-shadow:var(--shadow);}
.prod-card:hover{transform:translateY(-4px);border-color:var(--brand);}
.prod-card__ico{width:40px;height:40px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--accent));margin-bottom:12px;}
.prod-card h3{font-size:16px;margin:0 0 6px;}
.prod-card p{font-size:13px;color:var(--muted);margin:0;}
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.svc-card{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:22px;}
.svc-card h3{font-size:17px;color:var(--brand);margin-top:0;}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow);}
.scene-card h3{margin-top:0;color:var(--ink);}
.cta-band{background:linear-gradient(135deg,var(--dark),var(--dark-2));color:#fff;text-align:center;padding:46px 20px;margin-top:30px;}
.cta-band h2{color:#fff;border:0;}
.cta-inner p{color:#aebfd8;}

/* 解决方案 / 简单页 */
.lead{font-size:17px;color:var(--ink-2);}
.archive-list{list-style:none;padding:0;}
.archive-list li{padding:8px 0;border-bottom:1px solid var(--line);}
.archive-list time{color:var(--muted);font-size:13px;margin-left:10px;}

/* 404 */
.notfound{text-align:center;padding:90px 20px;}
.nf-code{font-size:80px;font-weight:800;color:var(--brand);margin:0;}
.notfound h1{margin:.1em 0;}
.nf-desc{color:var(--muted);}
.notfound .hero-actions{justify-content:center;display:flex;}

/* ───── 悬浮胶囊 ───── */
.float-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.capsule-btn{width:54px;height:54px;border:0;border-radius:30px;cursor:pointer;
  background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  box-shadow:0 8px 22px rgba(20,82,230,.35);transition:.2s;}
.capsule-btn:hover{transform:scale(1.06);}
.capsule-ico{font-size:18px;line-height:1;}
.capsule-txt{font-size:11px;}

/* 微信名片弹层 */
.wechat-modal{position:fixed;inset:0;z-index:80;display:flex;align-items:center;justify-content:center;}
.wechat-modal[hidden]{display:none;}
.wechat-modal__mask{position:absolute;inset:0;background:rgba(5,12,28,.6);backdrop-filter:blur(2px);}
.wechat-modal__panel{position:relative;background:#fff;border-radius:14px;padding:10px;box-shadow:var(--shadow);}
.wechat-modal__close{position:absolute;top:-12px;right:-12px;width:32px;height:32px;border-radius:50%;border:0;
  background:#fff;color:var(--ink);font-size:20px;cursor:pointer;box-shadow:var(--shadow);}
.wechat-card{display:block;width:300px;height:500px;object-fit:contain;border-radius:8px;}

/* ───── 关联内容区块（相关阅读 / 相关产品）───── */
#rel-read, #rel-prod{border-top:2px solid var(--brand);margin-top:2.4em;color:var(--ink);}
#rel-read{margin-top:2.6em;}
.rel-list{list-style:none;padding:0;margin:.6em 0 0;display:grid;gap:10px;}
.rel-list li{margin:0;background:#fff;border:1px solid var(--line);border-left:3px solid var(--brand-2);
  border-radius:10px;padding:12px 14px;box-shadow:var(--shadow);transition:.18s;}
.rel-list li:hover{border-left-color:var(--brand);transform:translateX(2px);}
.rel-list a{font-weight:600;}
.rel-list li::before{content:"";}

/* ───── 页脚 ───── */
.site-footer{background:var(--dark);color:#cdd8ee;margin-top:40px;padding:48px 20px 0;}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.4fr 2fr;gap:30px;}
.footer-desc{color:#9fb0cc;font-size:14px;max-width:420px;}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.footer-col h4{color:#fff;font-size:14px;margin:0 0 10px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin:6px 0;}
.footer-col a,.footer-col li{color:#9fb0cc;font-size:14px;}
.footer-bottom{max-width:var(--maxw);margin:30px auto 0;border-top:1px solid rgba(255,255,255,.1);
  padding:16px 0;display:flex;justify-content:space-between;font-size:13px;color:#8093b3;flex-wrap:wrap;gap:8px;}

/* ───── 响应式 ───── */
@media (max-width:1024px){
  .prod-grid{grid-template-columns:repeat(3,1fr);}
  .svc-grid,.scene-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .primary-nav{position:absolute;top:var(--nav-h);left:0;right:0;background:var(--dark);
    max-height:0;overflow:hidden;transition:.25s;}
  .primary-nav.open{max-height:80vh;overflow:auto;}
  .nav-list{flex-direction:column;padding:10px;}
  .has-mega .mega-panel{position:static;display:block;box-shadow:none;border:0;background:rgba(255,255,255,.04);}
  .nav-toggle{display:flex;}
  .mobile-cats{display:block;padding:6px 14px 14px;}
  .mobile-cats details{margin:6px 0;background:rgba(255,255,255,.05);border-radius:8px;padding:6px 12px;}
  .mobile-cats summary{cursor:pointer;color:#dfe8f7;font-size:14px;}
  .mobile-cats ul{list-style:none;padding:6px 0 0;margin:0;}
  .mobile-cats a{display:block;padding:5px 0;color:#cdd8ee;font-size:14px;}
  .detail-grid{grid-template-columns:1fr;}
  .toc-aside{display:none;}
  .list-grid{grid-template-columns:1fr;}
  .cat-side{position:static;}
  .prod-grid,.svc-grid,.scene-grid{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr;}
  .hero-title{font-size:34px;}
}