/* kb · 知识库/wiki 主题（Notion 式中性灰 + 文档三栏） */
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--font-body);background:var(--c-light);color:var(--c-dark);
  font-size:16px;line-height:1.7}
a{color:var(--c-accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--container);margin:0 auto;padding:0 24px}

/* 顶栏 */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--c-line)}
.topbar-in{display:flex;align-items:center;gap:22px;height:58px}
.brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15.5px;color:var(--c-dark);white-space:nowrap}
.brand:hover{text-decoration:none;opacity:.75}
.brand-mark{color:var(--c-accent);font-size:17px}
.topnav{display:flex;gap:18px;font-size:14px;margin-left:6px}
.topnav a{color:#5f5f5b}
.searchbox{position:relative;margin-left:auto;width:260px}
.searchbox input,.hero-search input{width:100%;padding:7px 12px;font-size:14px;font-family:inherit;
  border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-muted);color:var(--c-dark);outline:none}
.searchbox input:focus,.hero-search input:focus{border-color:var(--c-accent);background:#fff}

/* 搜索结果面板 */
.results{position:absolute;top:calc(100% + 6px);left:0;right:0;max-height:60vh;overflow:auto;
  background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);
  box-shadow:0 8px 28px rgba(0,0,0,.10);padding:6px;z-index:40;min-width:320px}
.results .r-title{font-size:12px;color:#8b8b86;padding:6px 10px 4px}
.results .r-item{display:block;padding:8px 10px;border-radius:4px;color:var(--c-dark)}
.results .r-item:hover{background:var(--c-muted);text-decoration:none}
.results .r-item b{font-weight:600;font-size:14.5px}
.results .r-item span{display:block;font-size:12.5px;color:#8b8b86;margin-top:2px}
.results .r-empty{padding:14px 10px;font-size:13.5px;color:#8b8b86}

/* Hero（首页） */
.hero{border-bottom:1px solid var(--c-line);background:linear-gradient(180deg,var(--c-muted) 0%,var(--c-light) 100%);
  padding:52px 0 40px;text-align:center}
.hero h1{font-size:38px;letter-spacing:-.02em;margin:0 0 8px;font-family:var(--font-display)}
.hero-sub{color:#6b6b66;font-size:16.5px;margin:0 0 22px}
.hero-search{position:relative;max-width:520px;margin:0 auto}
.hero-search input{padding:12px 16px;font-size:15px;background:#fff}
.hero-hint{color:#9a9a94;font-size:13px;margin:10px 0 0}

/* 首页区块 */
.sec-title{font-size:15px;text-transform:uppercase;letter-spacing:.06em;color:#8b8b86;
  margin:40px 0 14px;font-weight:600}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(216px,1fr));gap:12px}
.card{display:block;border:1px solid var(--c-line);border-radius:var(--radius);padding:16px 18px;
  background:#fff;color:var(--c-dark);transition:border-color .15s,transform .15s}
.card:hover{border-color:var(--c-line-dark);text-decoration:none;transform:translateY(-1px)}
.card-ico{display:block;width:26px;height:26px;line-height:26px;text-align:center;border-radius:4px;
  background:var(--c-muted);color:var(--c-accent);font-size:13px;font-weight:600;margin-bottom:10px}
.card-name{display:block;font-weight:600;font-size:15.5px}
.card-count{display:block;color:#8b8b86;font-size:13px;margin-top:3px}

.doclist{list-style:none;margin:0;padding:0}
.doclist li{display:flex;align-items:baseline;gap:10px;padding:9px 0;border-bottom:1px solid var(--c-line)}
.doclist li a{font-size:15.5px}
.doclist-date{margin-left:auto;color:#9a9a94;font-size:12.5px;white-space:nowrap}
.doclist.wide li a{font-size:16px}
.pill{display:inline-block;font-size:12px;padding:1px 8px;border:1px solid var(--c-line);
  border-radius:999px;color:#5f5f5b;background:var(--c-muted)}
.tagcloud{display:flex;flex-wrap:wrap;gap:6px}

/* FAQ（对 GEO 友好：问答成对、静态可见） */
.faq details{border:1px solid var(--c-line);border-radius:var(--radius);padding:12px 16px;margin-bottom:8px;background:#fff}
.faq summary{cursor:pointer;font-weight:600;font-size:15.5px}
.faq-body{margin-top:10px;color:#4a4a46;font-size:14.5px}
.faq-more{margin-top:8px;font-size:13.5px}

/* 文档三栏布局 */
.layout{display:grid;grid-template-columns:216px minmax(0,1fr) 196px;gap:40px;padding:32px 24px 72px;
  max-width:var(--container);margin:0 auto}
.layout>*{min-width:0}
.sidenav{font-size:14px;position:sticky;top:82px;align-self:start;max-height:calc(100vh - 120px);overflow:auto}
.sidenav h4{margin:0 0 8px;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:#9a9a94}
.sidenav ul{list-style:none;margin:0 0 20px;padding:0}
.sidenav li a{display:flex;gap:6px;color:#4a4a46;padding:4px 8px;border-radius:4px;font-size:13.5px}
.sidenav li a:hover{background:var(--c-muted);text-decoration:none}
.sidenav li a.active{background:var(--c-muted);color:var(--c-accent);font-weight:600}
.sidenav em{margin-left:auto;color:#b3b3ad;font-style:normal;font-size:12px}

.doc{min-width:0}
.crumb{font-size:13px;color:#9a9a94;display:flex;gap:6px;flex-wrap:wrap;margin-bottom:10px}
.crumb a{color:#6b6b66}
.crumb-cur{color:#b3b3ad;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:340px}
.doc h1{font-size:31px;line-height:1.3;letter-spacing:-.02em;margin:0 0 10px;font-family:var(--font-display)}
.meta{display:flex;gap:8px;color:#9a9a94;font-size:13px;margin-bottom:26px;flex-wrap:wrap}
.year{margin:26px 0 6px;font-size:19px}

/* 正文 */
.article-body{font-size:16px}
.article-body h2{font-size:22px;margin:32px 0 10px;padding-bottom:6px;border-bottom:1px solid var(--c-line)}
.article-body h3{font-size:18px;margin:22px 0 8px}
.article-body img{max-width:100%;border-radius:var(--radius)}
.article-body table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;display:block;overflow-x:auto}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:8px 12px;text-align:left}
.article-body th{background:var(--c-muted)}
.article-body blockquote{margin:16px 0;padding:2px 18px;border-left:3px solid var(--c-line-dark);color:#5f5f5b}
.article-body code{background:var(--c-muted);padding:2px 5px;border-radius:4px;font-size:.9em}
.article-body pre{background:var(--c-muted);border:1px solid var(--c-line);border-radius:var(--radius);
  padding:14px;overflow-x:auto;font-size:13.5px;line-height:1.6}
.article-body pre code{background:none;padding:0}
.article-body .admonition{border:1px solid var(--c-line);border-left:4px solid var(--c-accent);
  border-radius:var(--radius);padding:12px 16px;background:var(--c-muted);margin:16px 0}
.article-body .admonition-title{font-weight:600;margin:0 0 6px}

/* 右侧目录 */
.toc{font-size:13.5px;position:sticky;top:82px;align-self:start;border-left:1px solid var(--c-line);padding-left:16px}
.toc h4{margin:0 0 8px;font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:#9a9a94}
.toc ul{list-style:none;margin:0;padding:0}
.toc ul ul{padding-left:12px}
.toc li{margin:3px 0}
.toc a{color:#6b6b66;display:block}

/* 反馈 + 翻页 */
.helpful{margin:36px 0 0;padding:14px 18px;border:1px solid var(--c-line);border-radius:var(--radius);
  background:var(--c-muted);display:flex;align-items:center;gap:10px;font-size:14.5px}
.helpful .btn{cursor:pointer;border:1px solid var(--c-line);background:#fff;border-radius:4px;
  padding:3px 10px;font-size:15px}
.helpful.voted .btn{opacity:.45;pointer-events:none}
.pager{display:flex;justify-content:space-between;gap:16px;margin-top:28px;padding-top:18px;border-top:1px solid var(--c-line)}
.pager-a{display:flex;flex-direction:column;font-size:12.5px;color:#9a9a94;max-width:46%}
.pager-a.right{text-align:right;margin-left:auto}
.pager-a strong{font-size:14.5px;color:var(--c-accent);font-weight:600;margin-top:2px}

/* 页脚 */
.footer{border-top:1px solid var(--c-line);background:var(--c-muted);margin-top:20px}
.footer-in{display:flex;flex-wrap:wrap;gap:8px 26px;padding:22px 24px;font-size:13px;color:#6b6b66}
.footer a{color:#6b6b66}

@media (max-width:1080px){
  .layout{grid-template-columns:200px minmax(0,1fr);gap:28px}
  .toc{display:none}
}
@media (max-width:800px){
  .layout{grid-template-columns:1fr;gap:18px}
  .sidenav{position:static;max-height:none}
  .topnav{display:none}
  .searchbox{width:170px}
  .hero h1{font-size:30px}
}