/* AI + 飞书 官方操作手册 · 共用样式
   基础部分与 /doubao-feishu-agent.html 的内联样式同源（kb-layout 系列侧边栏），
   手册页额外需要表格、代码块、提示框和章节卡片。 */
:root{
  --c-bg-soft:#f3f4f6;
  --c-success:#18794e;
  --c-success-soft:#ecfbf3;
  --c-warning:#d97706;
  --c-info:#2563eb;
  --font-sans:"Inter","PingFang SC","Microsoft YaHei",ui-sans-serif,system-ui,sans-serif,"Apple Color Emoji","Segoe UI Emoji";
  --radius-sm:6px;
  --radius:8px;
  --radius-md:10px;
  --radius-lg:14px;
  --shadow-1:0 1px 2px rgba(0,0,0,.04);
  --shadow-2:0 4px 12px rgba(0,0,0,.06);
  --shadow-brand:0 8px 30px rgba(52,81,178,.12);
  }
  [data-theme="dark"]{
    --c-success:#3dd68c;
  }

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{margin:0;background:var(--c-bg);color:var(--c-text-1);font-family:var(--font-sans);font-size:15px;line-height:1.65}
a{color:inherit;text-decoration:none}
code{font-family:var(--font-mono)}
img{max-width:100%;height:auto}

.site-header{position:sticky;top:0;z-index:30;background:var(--header-bg);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-border)}
.header-inner{max-width:1200px;margin:0 auto;padding:.85rem 1.5rem;display:flex;align-items:center;justify-content:space-between;gap:2rem}
.brand{display:flex;align-items:center;gap:.55rem;font-weight:800;font-size:.98rem}
.brand-logo{width:26px;height:26px;background:var(--c-brand);border-radius:7px;color:#fff;display:grid;place-items:center;font-weight:900;font-size:.8rem}
.nav-inline{display:flex;gap:1.6rem;font-size:.88rem;color:var(--c-text-2);font-weight:500}
.nav-inline a{transition:color .15s}
.nav-inline a:hover,.nav-inline a.active{color:var(--c-brand);font-weight:600}
.header-day{font-family:var(--font-mono);font-size:.72rem;color:var(--c-text-3)}

.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
.container-tight{max-width:820px;margin:0 auto;padding:0 1.5rem}

.hero-page{padding:3.5rem 1.5rem 2.5rem;background:linear-gradient(180deg,var(--c-brand-soft) 0%,var(--c-bg) 90%)}
.hero-page .container,.hero-page .container-tight{padding:0}
.hero-eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.72rem;letter-spacing:.2em;text-transform:uppercase;color:var(--c-brand);font-weight:700;margin-bottom:1rem;background:var(--c-bg);border:1px solid var(--c-brand-line);border-radius:99px;padding:.35rem .95rem}
h1.hero-h1{font-size:clamp(1.8rem,3.6vw,2.6rem);line-height:1.15;font-weight:900;letter-spacing:-.02em;margin:0 0 .9rem;max-width:800px}
.hero-sub{color:var(--c-text-2);font-size:1rem;line-height:1.7;max-width:720px;margin:0 0 1.5rem}

footer{padding:2.5rem 1.5rem;border-top:1px solid var(--c-border);color:var(--c-text-3);font-size:.85rem;text-align:center}
footer a{color:var(--c-brand)}
footer .foot-nav{margin-bottom:.75rem;display:flex;gap:1.5rem;justify-content:center;flex-wrap:wrap;font-size:.82rem}
footer .foot-nav a{color:var(--c-text-2)}
footer .foot-nav a:hover{color:var(--c-brand)}

.prose{max-width:760px;margin:0 auto;padding:1.5rem 1.5rem 3rem;font-size:16px}
.prose h1{font-size:1.9rem;line-height:1.2;font-weight:900;letter-spacing:-.02em;margin:0 0 1rem}
.prose h2{font-size:1.4rem;font-weight:800;margin:2.5rem 0 .8rem;padding-bottom:.4rem;border-bottom:1px solid var(--c-divider);scroll-margin-top:80px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:1.15rem;font-weight:700;margin:1.75rem 0 .5rem;color:var(--c-text-1);scroll-margin-top:80px}
.prose p{margin:0 0 1rem;color:var(--c-text-1);line-height:1.8}
.prose ul,.prose ol{margin:0 0 1rem;padding-left:1.5rem}
.prose li{margin-bottom:.4rem;line-height:1.7;color:var(--c-text-1)}
.prose strong{color:var(--c-text-1);font-weight:700}
.prose code{background:var(--c-bg-alt);padding:.15rem .4rem;border-radius:4px;font-size:.9em;color:var(--c-brand);font-family:var(--font-mono)}
.prose blockquote{border-left:3px solid var(--c-brand);padding:.75rem 1rem;color:var(--c-text-2);margin:1rem 0;background:var(--c-brand-soft);border-radius:0 var(--radius) var(--radius) 0}
.prose blockquote p{margin:0 0 .5rem;color:var(--c-text-2)}
.prose blockquote p:last-child{margin-bottom:0}
.prose blockquote strong{color:var(--c-brand)}
.prose a{color:var(--c-brand);text-decoration:underline;text-decoration-color:var(--c-brand-line);text-underline-offset:2px}
.prose a:hover{text-decoration-color:var(--c-brand)}
.prose hr{border:none;border-top:1px solid var(--c-divider);margin:2rem 0}
.article-figure{margin:1.25rem 0 1.75rem}
.article-figure img{display:block;width:100%;height:auto;border:1px solid var(--c-border);border-radius:var(--radius-md);box-shadow:var(--shadow-2)}
.article-figure figcaption{margin-top:.6rem;text-align:center;font-size:.8rem;color:var(--c-text-3)}
.article-figure figcaption a{color:var(--c-text-3);text-decoration:underline;text-decoration-color:var(--c-border)}

/* 系列侧边栏 + 本文导读，跟 agent-engineer-kb.html 的 kb-layout 同一套 */
.kb-layout{max-width:1200px;margin:0 auto;padding:1.5rem;display:grid;grid-template-columns:240px 1fr;gap:2.5rem}
.kb-toc{position:sticky;top:70px;height:calc(100vh - 90px);overflow-y:auto;font-size:.85rem;padding-right:.5rem;border-right:1px solid var(--c-divider)}
.kb-toc h4{font-size:.72rem;letter-spacing:.15em;text-transform:uppercase;color:var(--c-text-3);font-weight:800;margin:0 0 .75rem;padding:0 .5rem}
.kb-toc ol{list-style:none;padding:0;margin:0}
.kb-toc li{margin:.15rem 0}
.kb-toc a{display:block;padding:.3rem .5rem;border-radius:4px;color:var(--c-text-2);transition:all .12s;line-height:1.4;font-size:.83rem}
.kb-toc a:hover{background:var(--c-bg-alt);color:var(--c-text-1)}
.kb-toc a.active{background:var(--c-brand-soft);color:var(--c-brand);font-weight:600}
.kb-toc .series-item{display:block;padding:.3rem .5rem;line-height:1.4;font-size:.83rem;color:var(--c-text-3)}
.kb-toc .series-item.muted{opacity:.6;cursor:default}
.prose{padding:0;max-width:none;margin:0}
.prose h2:first-child{margin-top:0}

@media (max-width:900px){
  .kb-layout{grid-template-columns:1fr;gap:0;padding:1rem}
  .kb-toc{position:static;height:auto;border-right:none;border-bottom:1px solid var(--c-divider);padding:1rem;margin-bottom:1rem;max-height:none}
}

@media (max-width:720px){
  .nav-inline{gap:1rem;font-size:.8rem}
  .header-day{display:none}
}
@media (max-width:640px){
  .nav-inline{display:none}
}
@media (max-width:520px){
  h1.hero-h1{font-size:1.6rem}
}

.header-tools{display:flex;align-items:center;gap:.5rem}
.theme-toggle{background:transparent;border:1px solid var(--c-border);border-radius:6px;padding:0;font-size:.95rem;color:var(--c-text-2);cursor:pointer;transition:all .12s;line-height:1;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px}
.theme-toggle:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft)}
.theme-toggle .icon-light,.theme-toggle .icon-dark{display:none}
[data-theme="dark"] .theme-toggle .icon-light{display:inline}
html:not([data-theme="dark"]) .theme-toggle .icon-dark{display:inline}
.menu-toggle{display:none;width:44px;height:44px;padding:0;border:1px solid var(--c-border);border-radius:8px;background:transparent;color:var(--c-text-1);font:inherit;font-size:1.15rem;cursor:pointer;align-items:center;justify-content:center}
.menu-toggle:hover{border-color:var(--c-brand);color:var(--c-brand);background:var(--c-brand-soft)}
.mobile-nav{display:none;max-width:1200px;margin:0 auto;padding:.55rem 1.25rem 1rem;grid-template-columns:repeat(2,minmax(0,1fr));gap:.4rem;border-top:1px solid var(--c-divider)}
.mobile-nav[hidden]{display:none}
.mobile-nav a{min-height:44px;display:flex;align-items:center;padding:.65rem .8rem;border-radius:8px;color:var(--c-text-2);font-size:.9rem;font-weight:600}
.mobile-nav a:hover,.mobile-nav a.active{background:var(--c-brand-soft);color:var(--c-brand)}
@media (max-width:640px){
  .menu-toggle{display:inline-flex}
  .mobile-nav:not([hidden]){display:grid}
}

/* ---- 手册页扩展 ---- */
/* grid 子项默认 min-width:auto，长代码块会把 1fr 列撑出视口 */
.kb-layout>.prose,.kb-layout>.kb-toc{min-width:0}
.prose h2 .step{display:inline-grid;place-items:center;min-width:1.7rem;height:1.7rem;margin-right:.5rem;padding:0 .35rem;border-radius:6px;background:var(--c-brand);color:#fff;font-size:.85rem;font-weight:800;vertical-align:.15em}
.prose pre{margin:0 0 1.1rem;padding:.85rem 1rem;overflow-x:auto;background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius);font-family:var(--font-mono);font-size:.84rem;line-height:1.6;color:var(--c-text-1)}
.prose pre code{background:none;padding:0;color:inherit;font-size:inherit;white-space:pre}
.prose pre .c{color:var(--c-text-3)}
.prose pre.output{background:var(--c-bg);border-style:dashed}
.table-wrap{overflow-x:auto;margin:0 0 1.25rem}
.prose table{width:100%;border-collapse:collapse;font-size:.9rem;line-height:1.6}
.prose th,.prose td{border:1px solid var(--c-border);padding:.5rem .7rem;text-align:left;vertical-align:top}
.prose th{background:var(--c-bg-alt);font-weight:700;white-space:nowrap}
.prose td code{white-space:nowrap}
.note{margin:1rem 0 1.25rem;padding:.75rem 1rem;border-radius:var(--radius);border:1px solid var(--c-brand-line);background:var(--c-brand-soft);font-size:.92rem}
.note p{margin:0 0 .4rem;color:var(--c-text-1)}
.note p:last-child{margin-bottom:0}
.note.warn{border-color:#f2c48d;background:#fff7ec}
[data-theme="dark"] .note.warn{border-color:#6b4a1f;background:#2a2116}
.note-title{font-weight:800;margin-right:.35rem}
.chapter-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:.9rem;margin:1rem 0 1.5rem}
.prose a.chapter-card{display:block;padding:1rem 1.1rem;border:1px solid var(--c-border);border-radius:var(--radius-md);background:var(--c-bg);color:var(--c-text-1);text-decoration:none;transition:border-color .15s,box-shadow .15s}
.prose a.chapter-card:hover{border-color:var(--c-brand);box-shadow:var(--shadow-brand)}
.chapter-card .num{display:block;font-family:var(--font-mono);font-size:.75rem;color:var(--c-brand);font-weight:700;margin-bottom:.3rem}
.chapter-card strong{display:block;font-size:1rem;margin-bottom:.3rem}
.chapter-card span.desc{display:block;font-size:.86rem;color:var(--c-text-2);line-height:1.6}
.page-nav{display:flex;justify-content:space-between;gap:1rem;margin-top:2.5rem;padding-top:1.25rem;border-top:1px solid var(--c-divider);flex-wrap:wrap}
.prose .page-nav a{text-decoration:none;display:inline-flex;align-items:center;min-height:44px;font-weight:600}
.source-list{font-size:.88rem}
.source-list li{margin-bottom:.25rem}
.kb-toc .series-sub{font-size:.72rem;color:var(--c-text-3);padding:0 .5rem;margin:-.4rem 0 .6rem;line-height:1.5}
.kb-toc .series-group{font-size:.7rem;letter-spacing:.08em;color:var(--c-text-3);font-weight:700;padding:.7rem .5rem .2rem}
.kb-toc .series-group:first-child{padding-top:0}
/* 当前篇的小节挂在它下面：缩进 + 细竖线，高亮用左边线，跟篇目的底色高亮区分开 */
.kb-toc ol.page-toc{margin:.2rem 0 .45rem .9rem;border-left:1px solid var(--c-divider)}
.kb-toc .page-toc li{margin:0}
.kb-toc .page-toc a{margin-left:-1px;padding:.22rem .5rem .22rem .75rem;border-left:2px solid transparent;border-radius:0;font-size:.8rem;font-weight:400;color:var(--c-text-2)}
.kb-toc .page-toc a:hover{background:none;color:var(--c-text-1)}
.kb-toc .page-toc a.active{background:none;color:var(--c-brand);border-left-color:var(--c-brand);font-weight:600}

/* 篇与篇之间切换：同源整页跳转也做过渡（Chrome/Edge 126+、Safari 18.2+，其他浏览器照旧硬跳）。
   导航栏两页一样，单独命名后原地不动；侧栏单独命名，从旧位置滑到新位置，不跟正文一起闪。 */
@view-transition{navigation:auto}
::view-transition-old(root),::view-transition-new(root){animation-duration:.16s}
.site-header{view-transition-name:site-header}
.kb-toc{view-transition-name:series-toc}
::view-transition-group(series-toc){animation-duration:.26s;animation-timing-function:cubic-bezier(.2,.8,.2,1)}
::view-transition-old(series-toc){animation-duration:.12s}
::view-transition-new(series-toc){animation-duration:.26s}
::view-transition-group(site-header){z-index:2}
@media (prefers-reduced-motion:reduce){
  @view-transition{navigation:none}
}