:root{
  --bg:#0b1f3a;
  --bg-soft:#0f2a4d;
  --ink:#1a2433;
  --ink-soft:#41506a;
  --line:#e3e9f2;
  --brand:#16b5c4;
  --brand-deep:#0e8fa0;
  --accent:#5ad1e0;
  --card:#ffffff;
  --muted:#6b7890;
  --maxw:1080px;
  --radius:14px;
  --shadow:0 10px 30px rgba(11,31,58,.08);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:#f5f8fc;
  line-height:1.75;
  padding-top:64px;
}
a{color:var(--brand-deep);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;height:auto;}
h1,h2,h3,h4{color:var(--bg);line-height:1.35;font-weight:700;}
h1{font-size:30px;margin:.2em 0 .5em;}
h2{font-size:23px;margin:1.6em 0 .6em;padding-bottom:.3em;border-bottom:2px solid var(--line);}
h3{font-size:18px;margin:1.3em 0 .5em;}
p{margin:.6em 0;}
table.data{border-collapse:collapse;width:100%;margin:1em 0;font-size:14.5px;background:#fff;
  border:1px solid var(--line);border-radius:10px;overflow:hidden;}
table.data th,table.data td{border:1px solid var(--line);padding:10px 14px;text-align:left;vertical-align:top;}
table.data thead th{background:var(--bg);color:#fff;font-weight:600;}
table.data tbody tr:nth-child(even){background:#f3f7fc;}
blockquote{margin:1em 0;padding:.8em 1.1em;background:#eef6f9;border-left:4px solid var(--brand);border-radius:8px;color:var(--ink-soft);}
code{background:#eef2f8;padding:2px 6px;border-radius:5px;font-size:13px;}

/* ===== 固定顶部导航 ===== */
.site-header{position:fixed;top:0;left:0;right:0;height:64px;z-index:50;
  background:rgba(11,31,58,.96);backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08);}
.header-inner{max-width:var(--maxw);margin:0 auto;height:64px;padding:0 16px;display:flex;align-items:center;gap:20px;}
.logo{font-size:20px;font-weight:800;color:#fff;letter-spacing:.5px;}
.logo-sub{color:var(--accent);font-weight:600;margin-left:6px;font-size:14px;}
.site-nav{margin-left:auto;display:flex;gap:26px;}
.site-nav a{color:#dce7f5;font-size:15px;}
.site-nav a:hover{color:var(--accent);text-decoration:none;}
.nav-burger{display:none;margin-left:auto;background:var(--brand);color:#04222a;font-weight:700;
  padding:8px 14px;border-radius:8px;cursor:pointer;font-size:14px;}
.nav-toggle{display:none;}
.nav-scrim{display:none;}

/* ===== 容器与面包屑对齐 ===== */
.page-container{max-width:var(--maxw);margin:0 auto;padding:0 16px;}
.breadcrumb{margin:18px 0 6px;font-size:13px;color:var(--muted);}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;padding:0;margin:0;}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:6px;color:#aab6c8;}
.breadcrumb a{color:var(--brand-deep);}

/* ===== 详情栅格：正文列与右侧目录 ===== */
.detail-grid{display:flex;gap:32px;align-items:flex-start;padding-bottom:40px;}
.content-col{flex:1;min-width:0;max-width:760px;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);padding:26px 30px;box-shadow:var(--shadow);}
.toc-aside{width:240px;flex:0 0 240px;}
.toc-inner{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow);}
.toc-title{font-size:13px;font-weight:700;color:var(--muted);margin:0 0 8px;text-transform:uppercase;letter-spacing:.5px;}
.toc-inner ul{list-style:none;margin:0;padding:0;font-size:13.5px;}
.toc-inner li{margin:4px 0;}
.toc-l3{padding-left:14px;}
.toc-inner a{color:var(--ink-soft);}
.toc-inner a:hover{color:var(--brand-deep);}

.article-title{font-size:28px;}
.article-meta{display:flex;gap:12px;align-items:center;margin:.3em 0 1.2em;flex-wrap:wrap;}
.cat-tag{display:inline-block;background:#e7f6f9;color:var(--brand-deep);font-size:12.5px;
  padding:3px 10px;border-radius:20px;font-weight:600;}
.date-tag{font-size:12.5px;color:var(--muted);}
.keywords{margin:.4em 0 1.2em;color:var(--ink-soft);font-size:14px;}
.lead-summary{font-size:15.5px;color:var(--ink);background:#f3f8fc;border:1px solid var(--line);
  border-radius:10px;padding:14px 16px;}

/* ===== FAQ（裸 details） ===== */
.faq-block{margin-top:1.6em;}
.faq-block h2{border:none;}
.faq-block details{border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:8px 0;background:#fff;}
.faq-block summary{cursor:pointer;font-weight:600;color:var(--bg);}
.faq-block details p{margin:.6em 0 0;color:var(--ink-soft);}

/* ===== 标签 ===== */
.tag-text{display:inline-block;background:#eef2f8;color:var(--ink-soft);font-size:13px;
  padding:4px 10px;border-radius:6px;margin:3px 4px 3px 0;}
.tag-row{display:flex;flex-wrap:wrap;gap:6px;}

/* ===== 列表 / 分类页 ===== */
.list-grid{display:flex;gap:28px;align-items:flex-start;padding-bottom:40px;}
.cat-side{flex:0 0 210px;background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:16px;box-shadow:var(--shadow);position:sticky;top:80px;}
.cat-side-title{font-size:13px;font-weight:700;color:var(--muted);margin:0 0 10px;text-transform:uppercase;}
ul.category-list{list-style:none;margin:0;padding:0;}
ul.category-list li{margin:2px 0;}
ul.category-list a{display:block;padding:9px 12px;border-radius:8px;color:var(--ink);font-size:14.5px;}
ul.category-list a:hover{background:#eef6f9;text-decoration:none;}
ul.category-list li.active a{background:var(--bg);color:#fff;font-weight:600;}
.cat-content{flex:1;min-width:0;}
.list-title{font-size:26px;}
.list-desc{color:var(--ink-soft);margin-bottom:1em;}
.item-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.item-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;box-shadow:var(--shadow);}
.item-card-head{display:flex;gap:10px;align-items:center;margin-bottom:6px;}
.item-card-title{font-size:18px;margin:.2em 0 .4em;}
.item-card-title a{color:var(--bg);}
.item-card-desc{color:var(--ink-soft);font-size:14px;margin:0 0 10px;}
.item-card-more{font-size:13.5px;font-weight:600;}

/* ===== 首页 ===== */
.hero{background:linear-gradient(135deg,var(--bg) 0%,var(--bg-soft) 60%,#103a52 100%);color:#fff;padding:70px 16px 80px;}
.hero-inner{max-width:var(--maxw);margin:0 auto;}
.hero-kicker{color:var(--accent);font-weight:700;letter-spacing:1px;margin:0 0 10px;font-size:14px;}
.hero-title{font-size:46px;margin:0 0 14px;color:#fff;}
.hero-sub{font-size:18px;max-width:720px;color:#cfe0ef;margin:0 0 26px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.btn-primary{display:inline-block;background:var(--brand);color:#04222a;font-weight:700;padding:12px 22px;border-radius:10px;}
.btn-primary:hover{background:var(--accent);text-decoration:none;}
.btn-ghost{display:inline-block;border:1px solid rgba(255,255,255,.4);color:#fff;padding:12px 22px;border-radius:10px;}
.btn-ghost:hover{border-color:var(--accent);text-decoration:none;}
.home-section{max-width:var(--maxw);margin:46px auto 0;padding:0 16px;}
.section-title{font-size:24px;border-left:4px solid var(--brand);padding-left:12px;}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.home-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:var(--shadow);}
.home-card h3{margin:.2em 0 .4em;color:var(--bg);}
.home-card p{color:var(--ink-soft);font-size:14px;margin:0;}
.service-list{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 26px;box-shadow:var(--shadow);}
.service-list li{margin:.5em 0;}

/* ===== 归档 / 页 ===== */
.archive-list{list-style:none;padding:0;}
.archive-list li{padding:8px 0;border-bottom:1px solid var(--line);}
.page-title{font-size:28px;}

/* ===== 页脚 ===== */
.site-footer{background:var(--bg);color:#cfe0ef;margin-top:50px;padding:40px 16px 20px;}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:24px;}
.footer-col h3{color:#fff;font-size:16px;margin:0 0 12px;}
.footer-col p{font-size:14px;color:#a9bdd2;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin:6px 0;font-size:14px;}
.footer-col a{color:#bcd2e6;}
.footer-bottom{max-width:var(--maxw);margin:24px auto 0;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:#8fa6bd;}

/* ===== 悬浮工具胶囊 ===== */
.float-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.capsule-btn{display:flex;align-items:center;justify-content:center;width:54px;height:54px;border-radius:27px;
  background:var(--bg);color:#fff;border:none;font-size:12.5px;font-weight:700;cursor:pointer;
  box-shadow:0 8px 20px rgba(11,31,58,.28);text-align:center;line-height:1.2;}
.capsule-btn:hover{background:var(--brand-deep);text-decoration:none;color:#fff;}
a.capsule-btn{text-decoration:none;}

/* ===== 企业微信名片弹窗 ===== */
.wechat-modal[hidden]{display:none;}
.wechat-modal{position:fixed;inset:0;z-index:80;background:rgba(4,18,30,.55);display:flex;align-items:center;justify-content:center;}
.wechat-card{position:relative;background:#fff;border-radius:12px;padding:10px;box-shadow:0 20px 50px rgba(0,0,0,.3);}
.wechat-card img{display:block;width:300px;height:500px;object-fit:contain;border-radius:8px;}
.wechat-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;
  background:var(--bg);color:#fff;border:none;cursor:pointer;font-weight:700;}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .detail-grid{flex-direction:column;}
  .toc-aside{width:100%;flex:none;order:2;}
  .toc-inner{position:static;max-height:none;}
  .list-grid{flex-direction:column;}
  .cat-side{width:100%;flex:none;position:static;}
  .item-list{grid-template-columns:1fr;}
  .card-grid{grid-template-columns:1fr;}
  .footer-inner{grid-template-columns:1fr 1fr;}
}
@media (max-width:760px){
  h1{font-size:24px;}
  .hero-title{font-size:34px;}
  .site-nav{position:fixed;top:64px;right:0;height:calc(100vh - 64px);width:240px;background:var(--bg);
    flex-direction:column;gap:0;padding:14px;transform:translateX(100%);transition:transform .25s ease;}
  .site-nav a{padding:14px 10px;border-bottom:1px solid rgba(255,255,255,.08);color:#dce7f5;}
  #nav-toggle:checked ~ .site-header .site-nav,
  #nav-toggle:checked ~ .site-nav{transform:translateX(0);}
  .nav-burger{display:inline-block;}
  #nav-toggle:checked ~ .nav-scrim{display:block;position:fixed;inset:64px 0 0 0;background:rgba(0,0,0,.3);z-index:40;}
  .content-col{padding:18px 16px;}
  .footer-inner{grid-template-columns:1fr;}
}