:root{
  --bg:#f5f8fc;
  --panel:#ffffff;
  --ink:#15233b;
  --ink-soft:#44566b;
  --line:#e2e9f3;
  --brand:#0b6cff;
  --brand-2:#00b3a4;
  --accent:#ff7a18;
  --radius:14px;
  --shadow:0 8px 30px rgba(20,40,80,.08);
  --h2-inset:16px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.75 -apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}

/* 顶部固定导航 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.header-inner{max-width:1200px;margin:0 auto;padding:12px 24px;display:flex;align-items:center;gap:18px}
.brand{font-weight:800;font-size:18px;color:var(--ink);white-space:nowrap}
.top-nav ul{display:flex;gap:22px;list-style:none;margin:0;padding:0}
.top-nav a{color:var(--ink-soft);font-weight:600}
.nav-toggle{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 14px;font-weight:700;cursor:pointer}

.wrap{max-width:1200px;margin:0 auto;padding:24px}
.layout{max-width:1080px;margin:0 auto;padding:0 24px;box-sizing:border-box}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px}
.list-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:32px}
.page-layout{--h2-inset:48px}

/* 面包屑：与正文 H2 左缘严格对齐 */
.breadcrumb{grid-column:1 / -1;padding-left:var(--h2-inset);margin:8px 0 18px;font-size:13px;color:var(--ink-soft)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:8px;color:#9fb0c5}
.breadcrumb [aria-current="page"]{color:var(--ink)}

.entry{padding-left:var(--h2-inset)}
.page-card{padding-left:var(--h2-inset);background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 28px 36px}
.page-body{padding-left:0}

h1{font-size:30px;line-height:1.3;margin:0 0 14px}
h2{font-size:22px;margin:34px 0 12px;padding-bottom:8px;border-bottom:2px solid var(--line)}
h3{font-size:18px;margin:24px 0 10px}
.entry h2,.post-body h2,.product-body h2{scroll-margin-top:90px}

/* 摘要块 / 关键词 / 更新时间 */
.abstract{background:linear-gradient(135deg,#eef5ff,#e7fbf6);border:1px solid #cfe2ff;border-left:4px solid var(--brand);border-radius:10px;padding:16px 18px;margin:0 0 14px;color:var(--ink)}
.abstract p{margin:.3em 0}
.kw-line{font-size:14px;color:var(--ink-soft);margin:6px 0}
.updated{font-size:13px;color:#8aa0b8;margin:0 0 10px}

/* 正文表格 / 引用 / 列表 */
.post-body,.product-body,.page-body{font-size:16px;color:var(--ink)}
.post-body p,.product-body p,.page-body p{margin:12px 0}
table.data{border-collapse:collapse;width:100%;margin:16px 0;font-size:15px;background:#fff}
table.data th,table.data td{border:1px solid var(--line);padding:9px 12px;text-align:left}
table.data thead th{background:#eef4ff;color:var(--ink);font-weight:700}
.callout{background:#fff7ed;border:1px solid #ffd8b0;border-radius:10px;padding:12px 16px;margin:18px 0;font-size:15px}
blockquote{margin:14px 0;padding:10px 16px;background:#f3f7fd;border-left:3px solid var(--brand);color:var(--ink-soft)}

/* FAQ 裸 details */
.faq{margin:28px 0}
.faq-title{font-size:20px;border-bottom:2px solid var(--line);padding-bottom:8px}
.faq details{border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:10px 0;background:#fff}
.faq summary{cursor:pointer;font-weight:700;color:var(--ink)}
.faq details p{margin:8px 0 0}

/* TOC 悬浮 */
.toc-side{grid-column:2;grid-row:2;align-self:start;position:sticky;top:88px;max-height:calc(100vh - 110px);overflow:auto}
.toc{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow)}
.toc-h{font-weight:800;margin:0 0 8px;font-size:14px;color:var(--ink-soft)}
.toc ul{list-style:none;margin:0;padding:0}
.toc li a{display:block;padding:4px 0;color:var(--ink-soft);font-size:14px}
.toc li.lvl-3 a{padding-left:14px;font-size:13px}
.toc a:hover{color:var(--brand)}

/* 列表页分类左栏 */
.cat-side{align-self:start}
.cat-side-h{font-weight:800;margin:0 0 10px;font-size:14px;color:var(--ink-soft)}
.category-list{list-style:none;margin:0;padding:0}
.category-list li{margin:2px 0}
.category-list a{display:block;padding:9px 12px;border-radius:8px;color:var(--ink-soft);font-weight:600}
.category-list a:hover,.category-list a.active{background:#eef4ff;color:var(--brand);text-decoration:none}
.cat-toggle{display:none}
.item-list{list-style:none;margin:0;padding:0}
.item-list li{padding:16px 0;border-bottom:1px solid var(--line)}
.item-title{font-size:18px;font-weight:700}
.item-cat{display:inline-block;font-size:12px;color:#fff;background:var(--brand-2);border-radius:6px;padding:1px 8px;margin-left:10px;vertical-align:middle}
.item-desc{color:var(--ink-soft);margin:6px 0 0;font-size:15px}
.cat-intro{color:var(--ink-soft);margin:6px 0 18px}

/* 首页 */
.hero{background:linear-gradient(135deg,#0b6cff,#00b3a4);color:#fff;border-radius:18px;padding:46px 40px;box-shadow:var(--shadow)}
.hero h1{margin:0 0 12px;font-size:34px}
.hero-sub{font-size:17px;opacity:.95;max-width:760px}
.hero-cta{margin-top:22px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;background:#fff;color:var(--brand);font-weight:800;padding:11px 22px;border-radius:10px}
.btn-ghost{background:transparent;border:2px solid #fff;color:#fff}
.home-cats{margin:30px 0}
.cat-chips{list-style:none;display:flex;flex-wrap:wrap;gap:12px;padding:0;margin:14px 0}
.cat-chips a{display:inline-block;background:var(--panel);border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-weight:600;box-shadow:var(--shadow)}
.home-feature{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.feat-list{list-style:none;padding:0;margin:12px 0}
.feat-list li{display:flex;justify-content:space-between;gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}
.feat-list span{color:#9fb0c5;font-size:13px;white-space:nowrap}
.archive-list{list-style:none;padding:0}
.archive-list li{padding:8px 0;border-bottom:1px solid var(--line)}
.archive-list span{color:#9fb0c5;font-size:13px}

/* 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{border:none;border-radius:999px;padding:12px 16px;font-weight:800;color:#fff;cursor:pointer;box-shadow:0 6px 18px rgba(11,108,255,.35);font-size:14px}
.capsule-top{background:linear-gradient(135deg,#0b6cff,#00b3a4)}
.capsule-wechat{background:linear-gradient(135deg,#ff7a18,#ff4d6d)}
.capsule-btn:hover{filter:brightness(1.05)}

/* 微信弹层 */
.wechat-modal{position:fixed;inset:0;background:rgba(10,20,40,.55);display:none;align-items:center;justify-content:center;z-index:80}
.wechat-modal.open{display:flex}
.wechat-card{background:#fff;border-radius:14px;padding:16px;position:relative;text-align:center}
.wechat-close{position:absolute;right:10px;top:6px;border:none;background:none;font-size:24px;cursor:pointer;color:#888}
.wechat-tip{font-size:13px;color:var(--ink-soft);margin:0 0 10px}
.wechat-img{display:block;width:300px;height:500px;object-fit:contain;background:#f3f7fd;border-radius:8px}

/* 页脚 */
.site-footer{margin-top:40px;background:#0e1b33;color:#cdd9ec;padding:30px 24px}
.footer-inner{max-width:1080px;margin:0 auto}
.footer-site{font-weight:800;margin:0 0 6px}
.footer-meta{font-size:13px;color:#9fb0c5;margin:0 0 12px}
.footer-nav a{color:#cdd9ec;margin-right:16px;font-size:14px}

/* 移动端 */
@media (max-width:860px){
  .nav-toggle{display:block;margin-left:auto}
  .top-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid var(--line)}
  .top-nav.open{display:block}
  .top-nav ul{flex-direction:column;padding:10px 24px;gap:10px}
  .article-layout{grid-template-columns:1fr}
  .toc-side{display:none}
  .list-layout{grid-template-columns:1fr}
  .cat-toggle{display:block;margin:0 0 12px;border:1px solid var(--line);background:#fff;border-radius:8px;padding:10px 14px;font-weight:700;cursor:pointer}
  .cat-side{display:none;margin-bottom:16px}
  .cat-side.open{display:block}
  .home-feature{grid-template-columns:1fr}
  .hero{padding:32px 22px}
  .layout{padding:0 16px}
  .breadcrumb{padding-left:0}
  .entry{padding-left:0}
  .page-card{padding-left:16px}
}