:root{
  --bg:#0b1220; --surface:#121d31; --surface-2:#172742; --text:#e8eef6;
  --muted:#9fb0c8; --primary:#0e7c86; --primary-2:#13a0ad; --accent:#f08a24;
  --line:#cbd5e1; --line-soft:#24344f; --radius:14px; --maxw:1180px;
  --header-h:64px; --h2-inset:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;line-height:1.75;font-size:16px}
a{color:var(--primary-2);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:var(--maxw);margin:0 auto;padding:0 var(--h2-inset)}
h1,h2,h3,h4{line-height:1.3;color:#fff}
h2{margin-top:2em;border-left:4px solid var(--accent);padding-left:12px}
h3{margin-top:1.4em;color:#dbe7f5}

/* ── Header ── */
.site-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:50;
  background:rgba(11,18,32,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line-soft)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700}
.brand-mark{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-size:14px;letter-spacing:.5px}
.brand-text{font-size:18px}
.site-nav{display:flex;gap:6px}
.nav-link{padding:8px 14px;border-radius:10px;color:var(--muted);font-size:15px}
.nav-link:hover{background:var(--surface-2);color:#fff;text-decoration:none}
.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}

body{padding-top:var(--header-h)}

/* ── Hero ── */
.hero{position:relative;padding:72px 0 56px;overflow:hidden;
  background:radial-gradient(1200px 500px at 70% -10%,rgba(19,160,173,.35),transparent 60%),
             radial-gradient(900px 400px at 10% 10%,rgba(240,138,36,.18),transparent 55%),var(--bg)}
.hero-eyebrow{color:var(--accent);letter-spacing:2px;font-size:13px;text-transform:uppercase;margin:0 0 10px}
.hero-title{font-size:clamp(30px,5vw,52px);margin:0 0 14px;font-weight:800}
.hero-sub{color:var(--muted);max-width:760px;font-size:17px;margin:0 0 24px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:22px}
.btn{display:inline-block;padding:12px 22px;border-radius:12px;font-weight:600}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff}
.btn-ghost{border:1px solid var(--line-soft);color:#fff}
.btn:hover{text-decoration:none;opacity:.92}
.hero-keywords{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:0}
.hero-keywords li{font-size:13px;color:#cfe3ee;background:var(--surface-2);border:1px solid var(--line-soft);padding:6px 12px;border-radius:999px}

/* ── Sections ── */
.section{padding:40px 0}
.section-title{font-size:24px;margin:0 0 18px}
.block-title{font-size:20px;margin:28px 0 12px}
.baseline-text{color:#d4e0ee;background:var(--surface);border:1px solid var(--line-soft);border-radius:var(--radius);padding:18px 20px}
.home-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.home-card{background:linear-gradient(180deg,var(--surface),var(--surface-2));border:1px solid var(--line-soft);border-radius:var(--radius);padding:18px}
.home-card h3{margin:0 0 8px;font-size:17px;color:#fff}
.home-card p{margin:0;color:var(--muted);font-size:14px}
.scene-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;padding:0;margin:0;list-style:none}
.scene-list li{background:var(--surface);border:1px solid var(--line-soft);border-radius:10px;padding:14px 16px;color:#dbe7f5}
.home-items{margin-top:8px}
.more-link{display:inline-block;margin-top:14px;color:var(--accent);font-weight:600}

/* ── Layout grid (detail) ── */
.article-layout,.list-layout,.page-wrap{padding-top:24px;padding-bottom:40px}
.layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start}
.breadcrumb-nav{margin-bottom:18px}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0;font-size:13px;color:var(--muted)}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:8px;color:var(--line-soft)}
.breadcrumb a{color:var(--muted)}
.entry-title{font-size:clamp(24px,3.4vw,34px);margin:0 0 8px}
.lead-summary{color:#cdd9e8;font-size:16px;background:var(--surface);border:1px solid var(--line-soft);border-left:4px solid var(--primary);padding:14px 18px;border-radius:10px;margin:0 0 22px}
.article-update{color:var(--muted);font-size:13px;margin:-6px 0 16px}
.content-main{max-width:820px}
.content-main p{color:#dbe6f2}
.page-main{max-width:860px}

/* ── TOC ── */
.toc-aside{position:sticky;top:calc(var(--header-h) + 16px);max-height:calc(100vh - var(--header-h) - 32px);overflow:auto}
.toc-panel{background:var(--surface);border:1px solid var(--line-soft);border-radius:12px;padding:10px 14px}
.toc-panel summary{cursor:pointer;font-weight:600;color:#fff;list-style:none}
.toc-panel summary::-webkit-details-marker{display:none}
.toc-panel summary::before{content:"▸";margin-right:8px;color:var(--accent);transition:transform .2s}
.toc-panel[open] summary::before{transform:rotate(90deg)}
.toc-list{list-style:none;padding:8px 0 0;margin:0}
.toc-li a{display:block;padding:5px 0;color:var(--muted);font-size:14px;border-bottom:1px dashed transparent}
.toc-li a:hover{color:#fff}
.toc-sub a{padding-left:14px;font-size:13px}

/* ── Category list (list pages) ── */
/* [M27] 列表页栅格列序：侧栏窄（220px）居左，内容占满剩余 1fr */
.list-layout .layout-grid.list-grid{display:grid;grid-template-columns:220px minmax(0,1fr);gap:28px}
.cat-side .cat-panel{background:var(--surface);border:1px solid var(--line-soft);border-radius:12px;padding:10px 12px;position:sticky;top:calc(var(--header-h) + 16px)}
.cat-panel summary{cursor:pointer;font-weight:600;color:#fff;list-style:none}
.cat-panel summary::-webkit-details-marker{display:none}
.cat-panel summary::before{content:"▸";margin-right:8px;color:var(--accent);transition:transform .2s}
.cat-panel[open] summary::before{transform:rotate(90deg)}
.category-list{list-style:none;padding:8px 0 0;margin:0}
.category-list li{margin:2px 0}
.category-list a{display:block;padding:8px 10px;border-radius:8px;color:var(--muted);font-size:14px}
.category-list a:hover,.category-list li.active a{background:var(--surface-2);color:#fff;text-decoration:none}

/* ── Item list ── */
.item-list{list-style:none;padding:0;margin:0}
.item-row{padding:18px 0;border-bottom:1px solid var(--line-soft)}
.item-row h3{margin:0 0 8px;font-size:19px;line-height:1.45}
.item-row h3 a{color:#fff}
.item-row p{margin:0;color:#c3d1e4;font-size:15px;line-height:1.7}

/* ── Tables (M26: 覆盖全部正文 table) ── */
.content-main table,.page-main table,table.data{
  border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;
  border:1px solid var(--line);
}
.content-main table th,.page-main table th,table.data th{
  background:var(--primary);color:#fff;border:1px solid var(--line);padding:9px 12px;text-align:left;
}
.content-main table td,.page-main table td,table.data td{
  border:1px solid var(--line);padding:8px 12px;color:#dbe6f2;
}
.content-main table tr:nth-child(even) td,table.data tr:nth-child(even) td{background:rgba(23,39,66,.6)}

/* ── FAQ ── */
.faq-block{margin-top:30px;border-top:1px solid var(--line-soft);padding-top:18px}
.faq-title{font-size:20px}
.faq-item{background:var(--surface);border:1px solid var(--line-soft);border-radius:10px;margin:10px 0;padding:0 14px}
.faq-item summary{cursor:pointer;padding:12px 0;font-weight:600;color:#fff;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"+";margin-right:10px;color:var(--accent);font-weight:700}
.faq-item[open] summary::before{content:"−"}
.faq-a{padding:0 0 12px;color:#d4e0ee;font-size:15px}

.case-callout{background:linear-gradient(180deg,rgba(240,138,36,.12),rgba(240,138,36,.04));
  border:1px solid rgba(240,138,36,.4);border-radius:12px;padding:14px 18px;margin:24px 0}
.case-callout h3{margin:0 0 6px;color:var(--accent);font-size:16px}
.case-callout p{margin:0;color:#e6d6c0;font-size:14px}

/* ── Footer ── */
.site-footer{background:var(--surface);border-top:1px solid var(--line-soft);margin-top:40px;padding:36px 0 18px}
.footer-inner{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.footer-col h4{margin:0 0 10px;color:#fff;font-size:15px}
.footer-col p,.footer-links a{color:var(--muted);font-size:14px}
.footer-links{list-style:none;padding:0;margin:0}
.footer-links li{margin:4px 0}
.footer-bottom{margin-top:24px;padding-top:16px;border-top:1px solid var(--line-soft);color:var(--muted);font-size:13px}

/* ── Floating capsule ── */
.float-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:8px;padding:8px;border-radius:999px;
  background:linear-gradient(160deg,var(--primary),var(--accent));box-shadow:0 8px 30px rgba(0,0,0,.45)}
.cap-btn{display:flex;flex-direction:column;align-items:center;gap:2px;width:56px;height:60px;border:0;
  border-radius:999px;background:rgba(255,255,255,.14);color:#fff;cursor:pointer;font-size:11px;transition:.2s}
.cap-btn:hover{background:rgba(255,255,255,.28)}
.cap-ico{font-size:20px;line-height:1}
.wecom-modal{position:fixed;inset:0;z-index:80;display:none}
.wecom-modal.show{display:block}
.wecom-modal-mask{position:absolute;inset:0;background:rgba(0,0,0,.6)}
.wecom-modal-box{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#fff;border-radius:12px;padding:10px}
.wecom-close{position:absolute;right:6px;top:2px;border:0;background:none;font-size:22px;cursor:pointer;color:#333}
.wecom-modal-box img{display:block;border-radius:8px}

/* ── 404 ── */
.notfound{padding:80px 0;text-align:center}
.notfound h1{font-size:64px;color:var(--accent)}

/* ── Responsive (M25: 不隐藏目录，仅折叠) ── */
@media (max-width:1024px){
  .layout-grid,.list-layout .layout-grid.list-grid{grid-template-columns:1fr}
  .toc-aside{position:static;max-height:none;margin-top:18px}
  .cat-side .cat-panel{position:static}
  .site-nav{position:absolute;top:var(--header-h);right:0;left:0;flex-direction:column;gap:0;
    background:var(--bg);border-bottom:1px solid var(--line-soft);display:none;padding:8px 16px}
  .site-nav.open{display:flex}
  .nav-toggle{display:flex}
  .nav-link{padding:12px 6px}
}
@media (max-width:560px){
  body{font-size:15px}
  .float-capsule{right:10px}
  .cap-btn{width:48px;height:52px}
}