:root{
  --bg:#F7F9FC; --surface:#FFFFFF; --ink:#0E2A47; --ink-2:#26415F;
  --muted:#5B6B82; --line:#D7E0EC; --line-strong:#CBD5E1;
  --accent:#FF6A1A; --cyan:#13B5C8; --cyan-deep:#0E7C8C;
  --header-h:64px; --h2-inset:0px;
  --radius:12px; --shadow:0 6px 24px rgba(14,42,71,.08);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.75; font-size:16px; -webkit-font-smoothing:antialiased;
}
a{color:var(--cyan-deep); text-decoration:none;}
a:hover{color:var(--accent);}
img{max-width:100%; height:auto;}
.container{max-width:1160px; margin:0 auto; padding:0 24px;}
code,pre{font-family:"SF Mono",Consolas,Menlo,monospace;}

/* ===== Header ===== */
.site-header{position:fixed; top:0; left:0; right:0; height:var(--header-h); z-index:100;
  background:linear-gradient(120deg,#0E2A47 0%,#13365c 60%,#0E7C8C 140%);
  color:#fff; box-shadow:0 2px 12px rgba(14,42,71,.18);}
.header-inner{max-width:1160px; margin:0 auto; height:100%; padding:0 24px;
  display:flex; align-items:center; gap:24px;}
.brand{display:flex; align-items:center; gap:10px; color:#fff;}
.brand-mark{display:inline-flex; color:var(--cyan);}
.brand-name{font-weight:700; font-size:18px; letter-spacing:.5px; display:flex; flex-direction:column; line-height:1.1;}
.brand-sub{font-size:11px; font-weight:400; color:#bcd4e6; letter-spacing:1px;}
.site-nav{display:flex; align-items:center; gap:18px; margin-left:auto;}
.site-nav>a,.nav-group-btn{color:#e7eef6; font-size:15px; background:none; border:none; cursor:pointer; padding:6px 2px; font-family:inherit;}
.site-nav>a:hover,.nav-group-btn:hover{color:var(--cyan);}
.nav-group{position:relative;}
.nav-group-panel{display:none; position:absolute; top:100%; left:0; background:#fff; color:var(--ink);
  border:1px solid var(--line); border-radius:10px; box-shadow:var(--shadow); padding:8px; min-width:120px;}
.nav-group:hover .nav-group-panel{display:block;}
.nav-group-panel a{display:block; padding:6px 10px; border-radius:6px; color:var(--ink); white-space:nowrap;}
.nav-group-panel a:hover{background:var(--bg); color:var(--accent);}
.nav-toggle{display:none; background:none; border:none; color:#fff; font-size:24px; cursor:pointer; margin-left:auto;}
.mobile-nav{background:#0E2A47; padding:12px 24px;}
.mobile-nav a,.mobile-cat summary{display:block; color:#e7eef6; padding:10px 0; border-bottom:1px solid rgba(255,255,255,.08);}
.mobile-cat a{padding-left:14px;}

/* ===== Hero ===== */
.hero{position:relative; margin-top:var(--header-h); padding:84px 0 64px; overflow:hidden;
  background:linear-gradient(160deg,#0E2A47 0%,#15395f 55%,#0c2237 100%); color:#fff;}
.hero-bg{position:absolute; inset:0; opacity:.5;}
.hero-svg{width:100%; height:100%;}
.chirp{stroke-dasharray:600; animation:dash 6s linear infinite;}
@keyframes dash{to{stroke-dashoffset:-600;}}
.hero-inner{position:relative; text-align:left;}
.hero-eyebrow{color:var(--cyan); letter-spacing:2px; font-size:13px; margin:0 0 12px;}
.hero-title{font-size:44px; line-height:1.2; margin:0 0 18px; font-weight:800;}
.hero-sub{font-size:17px; color:#cfe0ee; max-width:680px; margin:0 0 28px;}
.hero-cta{display:flex; gap:14px; flex-wrap:wrap;}
.btn-primary{background:var(--accent); color:#fff; padding:12px 26px; border-radius:30px; font-weight:600;}
.btn-primary:hover{color:#fff; background:#e85a0e;}
.btn-ghost{border:1px solid var(--cyan); color:var(--cyan); padding:12px 26px; border-radius:30px; font-weight:600;}
.btn-ghost:hover{background:rgba(19,181,200,.15); color:var(--cyan);}

/* ===== Sections ===== */
.section-title{font-size:26px; color:var(--ink); margin:48px 0 22px; padding-left:14px; border-left:4px solid var(--accent);}
.home-core,.home-keywords,.home-scene,.home-baseline,.home-latest{padding-bottom:8px;}
.core-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:20px;}
.core-card{background:var(--surface); border:1px solid var(--line); border-radius:var(--radius); padding:22px;
  box-shadow:var(--shadow); transition:transform .2s,border-color .2s;}
.core-card:hover{transform:translateY(-4px); border-color:var(--cyan);}
.core-tag{display:inline-block; background:rgba(19,181,200,.12); color:var(--cyan-deep); font-size:12px; font-weight:700; padding:3px 10px; border-radius:20px; margin-bottom:10px;}
.core-card h3{font-size:17px; margin:0 0 8px; color:var(--ink);}
.core-card p{color:var(--muted); font-size:14px; margin:0;}
.kw-cloud{display:flex; flex-wrap:wrap; gap:10px;}
.scene-list{list-style:none; padding:0; margin:0; display:grid; grid-template-columns:repeat(2,1fr); gap:14px;}
.scene-list li{background:var(--surface); border:1px solid var(--line); border-radius:10px; padding:16px 18px; font-size:15px;}
.scene-list strong{color:var(--ink-2);}
.baseline-note{color:var(--muted); font-size:14px; margin-top:12px;}
.latest-list{list-style:none; padding:0; margin:0; display:grid; grid-template-columns:repeat(2,1fr); gap:12px;}
.latest-list li{background:var(--surface); border:1px solid var(--line); border-radius:10px; padding:14px 16px; display:flex; justify-content:space-between; align-items:center; gap:10px;}
.latest-list a{font-weight:600;}
.latest-list span{color:var(--muted); font-size:13px; white-space:nowrap;}

/* ===== Layout grids ===== */
.article-layout{display:grid; grid-template-columns:minmax(0,1fr) 240px; gap:40px; max-width:1160px; margin:32px auto; padding:0 24px;}
.list-layout{display:grid; grid-template-columns:240px minmax(0,1fr); gap:36px; max-width:1160px; margin:32px auto; padding:0 24px;}
.page-wrap{max-width:860px; margin:32px auto; padding:0 24px;}

/* ===== Content typography ===== */
.content-main{min-width:0;}
.post-title{font-size:30px; line-height:1.3; color:var(--ink); margin:0 0 14px;}
.post-body{max-width:760px;}
.post-body h2{font-size:22px; color:var(--ink); margin:34px 0 12px; padding-bottom:8px; border-bottom:2px solid var(--line);}
.post-body h3{font-size:18px; color:var(--ink-2); margin:24px 0 10px;}
.post-body p{margin:0 0 14px; color:#22384f;}
.post-body ul,.post-body ol{padding-left:24px; margin:0 0 14px; color:#22384f;}
.post-body li{margin:6px 0;}
.post-body blockquote{margin:16px 0; padding:14px 18px; background:rgba(19,181,200,.08); border-left:4px solid var(--cyan); border-radius:8px; color:var(--ink-2);}
.post-body blockquote p{margin:0;}
.post-body strong{color:var(--ink);}
.tag-row{display:flex; flex-wrap:wrap; gap:8px; margin:6px 0 18px;}
.tag-text{display:inline-block; background:rgba(255,106,26,.1); color:var(--accent); font-size:13px; padding:3px 10px; border-radius:20px;}
.update-time{display:inline-block; color:var(--muted); font-size:13px; margin-bottom:8px;}

/* ===== Tables (covers markdown bare tables too) ===== */
.post-body table,.page-main table,table.spec{border-collapse:collapse; width:100%; max-width:760px; margin:18px 0; font-size:15px; border:1px solid var(--line-strong);}
.post-body th,.page-main th,table.spec th{background:var(--ink); color:#fff; padding:10px 12px; text-align:left; border:1px solid var(--line-strong);}
.post-body td,.page-main td,table.spec td{padding:9px 12px; border:1px solid var(--line-strong); color:#22384f;}
.post-body tbody tr:nth-child(even),.page-main tbody tr:nth-child(even),table.spec tbody tr:nth-child(even){background:#eef3f9;}

/* ===== TOC ===== */
.toc-aside{position:sticky; top:calc(var(--header-h) + 16px); align-self:start; max-height:calc(100vh - 100px); overflow-y:auto;}
.toc-panel,.cat-panel{background:var(--surface); border:1px solid var(--line); border-radius:10px; padding:14px 16px; box-shadow:var(--shadow);}
.toc-panel summary,.cat-panel summary{cursor:pointer; font-weight:700; color:var(--ink); list-style:none; padding:2px 0;}
.toc-panel summary::-webkit-details-marker{display:none;}
.toc-panel summary::after,.cat-panel summary::after{content:"▾"; float:right; color:var(--cyan);}
.toc-panel[open] summary::after,.cat-panel[open] summary::after{content:"▴";}
.toc-list{list-style:none; padding:8px 0 0; margin:0;}
.toc-list li{margin:6px 0; font-size:14px;}
.toc-lv3{padding-left:16px; font-size:13px; color:var(--muted);}

/* ===== Category list (left) ===== */
.category-list{list-style:none; padding:6px 0 0; margin:0;}
.category-list li{margin:2px 0;}
.category-list a{display:block; padding:8px 12px; border-radius:8px; color:var(--ink-2); font-size:15px;}
.category-list a:hover{background:var(--bg); color:var(--accent);}
.category-list li.active a{background:rgba(19,181,200,.14); color:var(--cyan-deep); font-weight:600;}

/* ===== List page items ===== */
.list-title{font-size:28px; color:var(--ink); margin:0 0 8px;}
.list-desc{color:var(--muted); margin:0 0 20px;}
.item-list{list-style:none; padding:0; margin:0;}
.item-row{background:var(--surface); border:1px solid var(--line); border-radius:10px; padding:16px 18px; margin-bottom:14px;}
.item-link{font-size:18px; font-weight:600; color:var(--ink);}
.item-link:hover{color:var(--accent);}
.item-summary{color:var(--muted); font-size:14px; margin:6px 0 8px;}
.item-meta{display:flex; gap:14px; font-size:13px; color:var(--muted);}
.item-cat{background:rgba(19,181,200,.12); color:var(--cyan-deep); padding:2px 10px; border-radius:14px;}

/* ===== Breadcrumb ===== */
.breadcrumb{margin:0 0 16px; padding:0;}
.breadcrumb ol{list-style:none; display:flex; flex-wrap:wrap; gap:6px; padding:0; margin:0; font-size:13px; color:var(--muted);}
.breadcrumb li:not(:last-child)::after{content:"›"; margin-left:6px; color:var(--line-strong);}
.breadcrumb a{color:var(--cyan-deep);}
.breadcrumb .current span{color:var(--ink-2);}

/* ===== FAQ ===== */
.faq-block{margin:36px 0; max-width:760px;}
.faq-title{font-size:22px; color:var(--ink); margin:0 0 14px; padding-left:14px; border-left:4px solid var(--accent);}
.faq-item{border:1px solid var(--line); border-radius:10px; padding:0; margin-bottom:10px; background:var(--surface);}
.faq-item summary{cursor:pointer; padding:14px 18px; font-weight:600; color:var(--ink-2); list-style:none;}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{content:"+"; float:right; color:var(--cyan); font-size:18px;}
.faq-item[open] summary::after{content:"−";}
.faq-a{padding:0 18px 14px; color:#22384f;}

/* ===== Case callout ===== */
.case-callout{background:rgba(255,106,26,.07); border-left:4px solid var(--accent); border-radius:8px; padding:14px 18px; margin:24px 0; max-width:760px;}
.case-title{margin:0 0 6px; color:var(--accent); font-size:16px;}
.case-callout p{margin:0; color:var(--ink-2); font-size:15px;}

/* ===== Pages ===== */
.page-main{min-width:0;}
.page-main h2{font-size:22px; color:var(--ink); margin:30px 0 12px; border-bottom:2px solid var(--line); padding-bottom:8px;}
.page-main h3{font-size:18px; color:var(--ink-2); margin:22px 0 10px;}
.page-main p{color:#22384f; margin:0 0 14px;}
.archive-section{margin:24px 0;}
.archive-list{columns:2; list-style:none; padding:0; margin:8px 0;}
.archive-list li{margin:4px 0; break-inside:avoid;}
.notfound{text-align:center; padding:60px 0;}

/* ===== Float capsule ===== */
.float-capsule{position:fixed; right:18px; top:50%; transform:translateY(-50%); z-index:90;
  display:flex; flex-direction:column; gap:10px;}
.cap-btn{width:54px; height:54px; border-radius:30px; border:none; cursor:pointer;
  background:linear-gradient(135deg,var(--cyan) 0%,var(--cyan-deep) 100%); color:#fff;
  display:flex; flex-direction:column; align-items:center; justify-content:center; gap:1px;
  font-size:11px; box-shadow:0 4px 16px rgba(14,124,140,.4); transition:transform .15s;}
.cap-btn:nth-child(1){background:linear-gradient(135deg,#FF8A3D,var(--accent)); box-shadow:0 4px 16px rgba(255,106,26,.4);}
.cap-btn:hover{transform:scale(1.08);}
.card-modal{position:fixed; inset:0; z-index:200; display:flex; align-items:center; justify-content:center;}
.card-modal[hidden]{display:none;}
.card-modal-backdrop{position:absolute; inset:0; background:rgba(14,42,71,.6);}
.card-modal-body{position:relative; background:#fff; padding:8px; border-radius:10px;}
.card-modal-body img{display:block; width:300px; height:500px; object-fit:contain;}
.card-modal-close{position:absolute; top:-14px; right:-14px; width:32px; height:32px; border-radius:50%; border:none; background:var(--ink); color:#fff; font-size:18px; cursor:pointer;}

/* ===== Footer ===== */
.site-footer{background:#0E2A47; color:#cfe0ee; margin-top:60px;}
.footer-inner{max-width:1160px; margin:0 auto; padding:40px 24px; display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:28px;}
.footer-logo{font-size:18px; font-weight:700; color:#fff; margin-bottom:10px;}
.footer-desc{font-size:14px; color:#9fb6cc; max-width:340px;}
.footer-col h4{color:#fff; font-size:15px; margin:0 0 12px;}
.footer-col ul{list-style:none; padding:0; margin:0;}
.footer-col li{margin:6px 0;}
.footer-col a{color:#bcd4e6; font-size:14px;}
.footer-col a:hover{color:var(--cyan);}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1); padding:16px 24px; text-align:center; font-size:13px; color:#8fa8c0; white-space:nowrap;}

/* ===== Pagination ===== */
.pagination{display:flex; align-items:center; gap:16px; margin:24px 0; font-size:14px;}
.page-info{color:var(--muted);}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .site-nav{display:none;}
  .nav-toggle{display:block;}
  .hero-title{font-size:34px;}
  .core-grid{grid-template-columns:repeat(2,1fr);}
  .scene-list,.latest-list{grid-template-columns:1fr;}
  .article-layout{grid-template-columns:1fr;}
  .list-layout{grid-template-columns:1fr;}
  .toc-aside{position:static; max-height:none;}
  .footer-inner{grid-template-columns:1fr 1fr;}
}
@media (max-width:640px){
  .core-grid{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr;}
  .archive-list{columns:1;}
  .float-capsule{right:10px;}
  .cap-btn{width:46px; height:46px;}
}