/* Study GrokBot — 自写样式 / hand-written styles.
   浅色 + 深色两套主题（默认跟随系统），默认优先使用系统已安装的宋体 / 衬线字体，不加载任何外部字体。
   Light + dark themes (default: follow the OS); serif / Song fonts already installed on the device; no web fonts. */
:root{
  /* ---- 字体 / fonts (system only) ---- */
  --font-zh:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC","Source Han Serif CN","SimSun","NSimSun","宋体","Noto Serif SC",Georgia,"Times New Roman",serif;
  --font-en:"Iowan Old Style","Palatino Linotype",Georgia,"Times New Roman","Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC","Source Han Serif CN","SimSun","NSimSun","宋体","Noto Serif SC",serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --font:var(--font-en);
  --track-display:-.012em;
  /* ---- 浅色（默认值）/ light palette ---- */
  --bg:#ffffff;--card:#f7f6f3;--card-2:#fbfaf8;--card-hover:#f0eeea;--soft:#efeee9;--soft-hover:#e5e3de;
  --border:#e8e6e1;--border-2:#d8d5ce;--fg:#0a0a0a;--text:#2a2d33;--text-strong:#1d2025;--muted:#686c73;--muted-2:#4b5058;
  --accent:#ff6a08;--accent-text:#b23c08;--accent-soft:rgba(255,106,8,.10);--pro:#15803d;--con:#b91c1c;
  --ink:10 10 10;--header-bg:rgba(255,255,255,.85);--pill-bg:rgba(10,10,10,.04);--side-bg:rgba(10,10,10,.02);
  --showcase-bg:linear-gradient(180deg,#fdfcfa,#f6f5f1);--solid-bg:#0a0a0a;--solid-fg:#ffffff;--solid-hover:#2a2a2a;
  --bubble:#ecebe6;--code-bg:#f1efeb;--chip:#ecebe6;--grad:linear-gradient(100deg,#ff8a3d 0%,#ea580c 50%,#b23c08 100%);
  --glow:rgba(255,106,8,.14);color-scheme:light;
  /* ---- 尺寸 / sizes ---- */
  --radius-lg:28px;--radius:20px;--radius-sm:12px;--content:64rem;--header-h:64px;--ease:cubic-bezier(.22,1,.36,1);
}
:lang(en){--font:var(--font-en);--track-display:-.012em}
:lang(zh){--font:var(--font-zh);--track-display:0}
[lang]{font-family:var(--font)}
[data-theme=dark]{
  --bg:#0a0a0a;--card:#1a1a1a;--card-2:#141414;--card-hover:#202020;--soft:#202020;--soft-hover:#2a2a2a;
  --border:#1f2329;--border-2:#2a2e35;--fg:#ffffff;--text:#d5d9e2;--text-strong:#e8eaee;--muted:#868a92;--muted-2:#a9b1bc;
  --accent:#ff6a08;--accent-text:#ffb37a;--accent-soft:rgba(255,106,8,.12);--pro:#8ee6b3;--con:#ff9b8a;
  --ink:255 255 255;--header-bg:rgba(10,10,10,.85);--pill-bg:rgba(26,26,26,.6);--side-bg:rgba(0,0,0,.25);
  --showcase-bg:linear-gradient(180deg,#151515,#0f0f0f);--solid-bg:#ffffff;--solid-fg:#0a0a0a;--solid-hover:#e9ebef;
  --bubble:#2a2a2a;--code-bg:#1d1d1d;--chip:#232323;--grad:linear-gradient(100deg,#ffe2c8 0%,#ffb37a 45%,#ff6a08 100%);
  --glow:rgba(255,106,8,.18);color-scheme:dark;
}
/* 无 JS 时也跟随系统 / follow the OS without JS */
@media (prefers-color-scheme:dark){:root:not([data-theme]){
  --bg:#0a0a0a;--card:#1a1a1a;--card-2:#141414;--card-hover:#202020;--soft:#202020;--soft-hover:#2a2a2a;
  --border:#1f2329;--border-2:#2a2e35;--fg:#ffffff;--text:#d5d9e2;--text-strong:#e8eaee;--muted:#868a92;--muted-2:#a9b1bc;
  --accent:#ff6a08;--accent-text:#ffb37a;--accent-soft:rgba(255,106,8,.12);--pro:#8ee6b3;--con:#ff9b8a;
  --ink:255 255 255;--header-bg:rgba(10,10,10,.85);--pill-bg:rgba(26,26,26,.6);--side-bg:rgba(0,0,0,.25);
  --showcase-bg:linear-gradient(180deg,#151515,#0f0f0f);--solid-bg:#ffffff;--solid-fg:#0a0a0a;--solid-hover:#e9ebef;
  --bubble:#2a2a2a;--code-bg:#1d1d1d;--chip:#232323;--grad:linear-gradient(100deg,#ffe2c8 0%,#ffb37a 45%,#ff6a08 100%);
  --glow:rgba(255,106,8,.18);color-scheme:dark;
}}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 24px)}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--font);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
a{color:inherit;text-decoration:none}
img,svg{display:block;max-width:100%}
::selection{background:rgb(var(--ink) / .18)}
.skip{position:absolute;left:-999px}.skip:focus{left:16px;top:12px;z-index:100;background:var(--solid-bg);color:var(--solid-fg);padding:6px 12px;border-radius:99px}
.container{width:100%;max-width:calc(var(--content) + 48px);margin:0 auto;padding:0 24px}
.container.narrow{max-width:calc(52rem + 48px)}
.center{text-align:center}
.hide-xs{} .hide-sm{}

/* ---------- 按钮 / 胶囊 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:11px 20px;font-size:14px;font-weight:500;line-height:1.2;border:0;cursor:pointer;white-space:nowrap;transition:background-color .15s,color .15s,transform .2s var(--ease);font-family:inherit}
.btn svg{width:16px;height:16px}
.btn:active{transform:scale(.98)}
.btn-solid{background:var(--solid-bg);color:var(--solid-fg)}
.btn-solid:hover{background:var(--solid-hover)}
.btn-soft{background:var(--soft);color:var(--fg)}
.btn-soft:hover{background:var(--soft-hover)}
.btn-sm{padding:8px 16px;font-size:13px}
.btn-icon{padding:9px;width:36px;height:36px}
.btn-icon svg{width:18px;height:18px}

.pill{display:inline-flex;align-items:center;gap:10px;max-width:100%;padding:6px 6px 6px 12px;border-radius:999px;background:var(--pill-bg);border:1px solid transparent;font-size:13px;letter-spacing:-.01em;color:var(--fg);transition:background .2s,border-color .2s;margin-bottom:22px}
.pill:hover{background:var(--card);border-color:rgb(var(--ink) / .08)}
.pill > span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.pill-strong{font-weight:600}
.pill-sep{color:rgb(var(--ink) / .3)}
.pill-icon{display:grid;place-items:center;width:24px;height:24px;border-radius:99px;background:rgb(var(--ink) / .06);flex:none}
.pill-icon svg{width:12px;height:12px}

/* ---------- 顶栏 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:var(--header-bg);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid rgb(var(--ink) / .04)}
.nav{height:var(--header-h);display:flex;align-items:center;gap:28px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;letter-spacing:-.005em;color:var(--fg);font-size:15px}
.mark{width:26px;height:26px;color:var(--fg)}
.nav-links{display:flex;gap:4px;flex:1}
.nav-links a{font-size:14px;color:var(--muted-2);padding:6px 12px;border-radius:99px;transition:color .15s,background .15s}
.nav-links a:hover,.nav-links a[aria-current]{color:var(--fg);background:rgb(var(--ink) / .04)}
.nav-cta{display:flex;gap:8px;align-items:center}
.nav-toggle{display:none}
.mobile-menu{display:none}

/* ---------- 文字 ---------- */
.display{font-weight:600;letter-spacing:var(--track-display);color:var(--fg);line-height:1.12;font-size:clamp(36px,5.2vw,60px);margin:0 auto;text-wrap:balance;max-width:16em}
.hero-title em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:clamp(16px,1.6vw,18px);color:var(--muted-2);max-width:36em;margin:22px auto 0;line-height:1.75;text-wrap:pretty}
.lede-alt{font-size:14px;color:var(--muted);max-width:40em;margin:10px auto 0;line-height:1.6}
.h2{font-size:clamp(28px,3.4vw,40px);font-weight:600;letter-spacing:var(--track-display);color:var(--fg);margin:0;line-height:1.15}
.sub{color:var(--muted-2);margin:14px 0 0;font-size:16px}
.cta-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:34px}

/* ---------- 首页 Hero ---------- */
.hero{padding:132px 0 40px}
.showcase{margin:72px auto 0;max-width:58rem;border-radius:var(--radius-lg);background:var(--showcase-bg);border:1px solid var(--border);display:grid;grid-template-columns:240px 1fr;overflow:hidden;box-shadow:0 40px 120px -40px rgba(255,106,8,.18),0 0 0 1px rgb(var(--ink) / .02) inset;text-align:left;position:relative}
.showcase::before{content:"";position:absolute;inset:-1px;border-radius:inherit;pointer-events:none;background:radial-gradient(600px 200px at 70% 0%,rgba(255,140,60,.10),transparent 70%)}
.sc-side{border-right:1px solid var(--border);padding:18px 12px;background:var(--side-bg)}
.sc-side-h{font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);padding:4px 10px 10px}
.sc-bot{display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:12px;font-size:13px}
.sc-bot b{display:block;font-weight:500;color:var(--text-strong);line-height:1.3}
.sc-bot i{display:block;font-style:normal;font-size:11.5px;color:var(--muted);line-height:1.3}
.sc-bot.on{background:rgb(var(--ink) / .06)}
.av{flex:none;width:28px;height:28px;border-radius:99px;display:grid;place-items:center;font-size:12px;font-weight:600;color:#0a0a0a}
.av-a{background:#9ad7ff}.av-b{background:#b7a6ff}.av-c{background:#ffb37a}.av-d{background:#8ee6b3}.av-e{background:#f6a6c8}
.sc-main{display:flex;flex-direction:column;min-height:400px}
.sc-top{display:flex;align-items:center;gap:10px;padding:14px 20px;border-bottom:1px solid var(--border);font-size:14px;color:var(--fg)}
.sc-top b{font-weight:500}
.sc-status{margin-left:auto;display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--accent-text);background:var(--accent-soft);padding:3px 10px;border-radius:99px}
.dot{width:6px;height:6px;border-radius:99px;background:var(--accent);animation:pulse 1.6s ease-in-out infinite}
@keyframes pulse{50%{opacity:.35}}
.sc-msgs{flex:1;display:flex;flex-direction:column;gap:12px;padding:22px 20px}
.msg{max-width:78%;padding:10px 14px;border-radius:16px;font-size:14px;line-height:1.6;color:var(--text)}
.msg.me{align-self:flex-end;background:var(--bubble);color:var(--fg);border-bottom-right-radius:6px}
.msg.bot{align-self:flex-start;background:transparent;border:1px solid var(--border-2);border-bottom-left-radius:6px}
.mention{color:var(--accent-text)}
.msg.handoff{align-self:flex-start;background:var(--card-2);border:1px dashed var(--border-2);font-size:13px;color:var(--muted-2)}
.msg.handoff b{color:var(--fg);font-weight:500}
.typing{display:flex;gap:4px;padding:14px}
.typing span{width:6px;height:6px;border-radius:99px;background:var(--muted);animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.15s}.typing span:nth-child(3){animation-delay:.3s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.sc-input{margin:0 16px 16px;padding:12px 12px 12px 16px;border-radius:999px;background:var(--code-bg);border:1px solid var(--border-2);font-size:13.5px;color:var(--muted);display:flex;align-items:center}
.sc-send{margin-left:auto;width:28px;height:28px;border-radius:99px;background:var(--solid-bg);color:var(--solid-fg);display:grid;place-items:center}
.sc-send svg{width:14px;height:14px}

/* ---------- 区块 ---------- */
.section{padding:112px 0 0}
.section-head{margin-bottom:40px}
.section-head.row{display:flex;align-items:flex-end;justify-content:space-between;gap:16px}
.section-head.center .sub{max-width:34em;margin-left:auto;margin-right:auto}

.feature-card{display:grid;grid-template-columns:1.35fr 1fr;gap:40px;padding:40px;border-radius:var(--radius-lg);background:var(--card);transition:background .25s,transform .4s var(--ease)}
.feature-card:hover{background:var(--card-hover)}
.fc-meta{display:flex;gap:12px;align-items:center;font-size:13px;color:var(--muted)}
.badge{font-family:var(--mono);font-size:12px;color:var(--accent-text);background:var(--accent-soft);padding:3px 10px;border-radius:99px}
.fc-title{font-size:clamp(24px,2.6vw,32px);font-weight:600;letter-spacing:var(--track-display);color:var(--fg);margin:16px 0 0;line-height:1.25}
.fc-sum{color:var(--muted-2);margin:14px 0 0}
.fc-btn{margin-top:28px}
.fc-right{border-left:1px solid rgb(var(--ink) / .06);padding-left:32px}
.fc-toc-h{font-size:12px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin-bottom:12px}
.fc-right ol{list-style:none;margin:0;padding:0;counter-reset:t}
.fc-right li{counter-increment:t;display:flex;gap:12px;padding:10px 0;border-bottom:1px solid rgb(var(--ink) / .05);font-size:14.5px;color:var(--text)}
.fc-right li::before{content:counter(t,decimal-leading-zero);font-family:var(--mono);font-size:12px;color:var(--muted);padding-top:2px}

.tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:20px 0 0}
.center .tags{justify-content:center}
.tags li{font-size:12.5px;color:var(--muted-2);border:1px solid var(--border-2);padding:3px 12px;border-radius:99px}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.card{background:var(--card);border-radius:var(--radius-lg);padding:32px 32px 0;overflow:hidden;display:flex;flex-direction:column;min-height:330px}
.card-k{font-family:var(--mono);font-size:12px;color:var(--muted)}
.card h3{font-size:21px;font-weight:600;color:var(--fg);margin:10px 0 0;letter-spacing:-.01em}
.card p{color:var(--muted-2);margin:8px 0 0;font-size:15px}
.card-art{margin-top:auto;padding-top:28px}
.art-prompt code{display:block;font-family:var(--mono);font-size:12.5px;line-height:1.8;color:var(--muted-2);background:var(--card-2);border:1px solid var(--border);border-bottom:0;border-radius:16px 16px 0 0;padding:18px 20px 24px}
.art-chips{display:flex;flex-wrap:wrap;gap:8px;padding-bottom:32px}
.art-chips span{font-size:13px;padding:7px 14px;border-radius:99px;background:var(--chip);color:var(--text-strong)}
.art-chips span:nth-child(odd){background:var(--accent-soft);color:var(--accent-text)}
.art-quote{font-size:17px;color:var(--fg);line-height:1.6;padding:0 0 0 16px;border-left:2px solid var(--accent);margin:auto 0 32px}
.art-quote span{display:block;font-size:13px;color:var(--muted);margin-top:6px}
.art-steps{display:flex;gap:6px;padding-bottom:32px;flex-wrap:wrap}
.art-steps span{flex:1;min-width:56px;text-align:center;font-size:12.5px;padding:10px 4px;border-radius:12px;background:var(--chip);color:var(--muted)}
.art-steps span.on{background:var(--solid-bg);color:var(--solid-fg);font-weight:500}

.mini-card{position:relative;background:var(--card);border-radius:var(--radius);padding:28px 28px 64px;transition:background .2s}
.mini-card:hover{background:var(--card-hover)}
.mini-card h3{margin:0;font-size:18px;font-weight:500;color:var(--fg)}
.mini-card p{margin:8px 0 0;color:var(--muted-2);font-size:14.5px}
.mc-go{position:absolute;left:28px;bottom:24px;width:28px;height:28px;border-radius:99px;background:rgb(var(--ink) / .06);display:grid;place-items:center;transition:transform .3s var(--ease),background .2s}
.mc-go svg{width:14px;height:14px}
.mini-card:hover .mc-go{transform:translateX(4px);background:var(--solid-bg);color:var(--solid-fg)}

/* 往期列表 */
.issue-list{border-top:1px solid var(--border)}
.issue-row{display:grid;grid-template-columns:80px 1fr auto 28px;gap:20px;align-items:center;padding:22px 4px;border-bottom:1px solid var(--border);transition:background .2s}
.issue-row:hover{background:rgb(var(--ink) / .02)}
.ir-no{font-family:var(--mono);font-size:12.5px;color:var(--muted)}
.ir-title{display:block;color:var(--fg);font-size:17.5px;font-weight:600}
.ir-sum{display:block;color:var(--muted);font-size:14px;margin-top:4px;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical}
.ir-date{font-size:13px;color:var(--muted);font-family:var(--mono)}
.ir-go svg{width:16px;height:16px;color:var(--muted);transition:transform .3s var(--ease),color .2s}
.issue-row:hover .ir-go svg{transform:translateX(4px);color:var(--fg)}
.month{font-size:14px;font-weight:500;color:var(--muted);margin:48px 0 12px;letter-spacing:.02em}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:1fr 1.5fr;gap:48px}
.faq details{border-bottom:1px solid var(--border);padding:4px 0}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 0;color:var(--fg);font-size:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:22px;font-weight:300;color:var(--muted);transition:transform .3s var(--ease)}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{margin:0 0 20px;color:var(--muted-2);font-size:15px;padding-right:32px}
.faq a,.prose a{color:var(--fg);text-decoration:underline;text-decoration-color:rgb(var(--ink) / .3);text-underline-offset:3px}
.faq a:hover,.prose a:hover{text-decoration-color:var(--fg)}

.cta-band{padding-bottom:0}
.cta-band .container{background:radial-gradient(500px 200px at 50% 0%,rgba(255,106,8,.14),transparent 70%),var(--card);border-radius:var(--radius-lg);padding:72px 24px;max-width:var(--content)}

/* ---------- 文档页 ---------- */
.page-hero{padding:112px 0 56px}
.page-hero .display{font-size:clamp(30px,4.2vw,48px);max-width:20em}
.doc-layout{display:grid;grid-template-columns:220px minmax(0,1fr);gap:56px;align-items:start;max-width:calc(68rem + 48px)}
.doc-aside{position:sticky;top:calc(var(--header-h) + 32px);max-height:calc(100vh - var(--header-h) - 64px);overflow:auto;scrollbar-width:none}
.toc-h{font-size:12px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin-bottom:12px}
.toc ul{list-style:none;margin:0;padding:0;border-left:1px solid var(--border)}
.toc li a{display:block;font-size:13.5px;line-height:1.5;color:var(--muted);padding:6px 0 6px 14px;margin-left:-1px;border-left:1px solid transparent;transition:color .15s,border-color .15s}
.toc li.d3 a{padding-left:28px;font-size:13px}
.toc li a:hover{color:var(--fg)}
.toc li a.active,.toc li a[aria-current]{color:var(--fg);border-left-color:var(--fg)}

.prose{max-width:46rem;font-size:16.5px;line-height:1.85;color:var(--text);min-width:0}
.prose > :first-child{margin-top:0}
.prose h2{font-size:28px;font-weight:600;letter-spacing:var(--track-display);color:var(--fg);margin:72px 0 16px;line-height:1.3;position:relative}
.prose h3{font-size:20px;font-weight:600;color:var(--fg);margin:48px 0 12px;line-height:1.4;position:relative}
.prose h4{font-size:16px;color:var(--fg);margin:28px 0 8px}
.anchor{position:absolute;left:-1.1em;color:var(--muted);opacity:0;text-decoration:none!important;transition:opacity .15s;font-weight:400}
.prose h2:hover .anchor,.prose h3:hover .anchor{opacity:1}
.prose p{margin:14px 0}
.prose ul,.prose ol{padding-left:1.4em}
.prose li{margin:6px 0}
.prose li::marker{color:var(--muted)}
.prose strong{color:var(--fg);font-weight:600}
.prose code{font-family:var(--mono);font-size:.88em;background:var(--code-bg);border:1px solid var(--border);padding:1px 6px;border-radius:6px}
.prose hr{border:0;border-top:1px solid var(--border);margin:48px 0}

.callout{margin:28px 0;padding:22px 24px;border-radius:var(--radius);background:linear-gradient(135deg,rgba(255,106,8,.10),rgba(255,106,8,.02) 60%),var(--card);border:1px solid rgba(255,106,8,.18)}
.callout-lead{font-size:13px;font-weight:600;color:var(--accent-text);letter-spacing:.02em}
.callout-body p{margin:6px 0 0;color:var(--fg);font-size:17px;line-height:1.75}

.prompt{margin:22px 0;border-radius:16px;background:var(--card-2);border:1px solid var(--border);overflow:hidden}
.prompt-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 12px 10px 16px;border-bottom:1px solid var(--border);font-size:12.5px;color:var(--muted)}
.copy-btn{font:inherit;font-size:12px;color:var(--fg);background:var(--soft);border:0;padding:5px 12px;border-radius:99px;cursor:pointer;transition:background .15s}
.copy-btn:hover{background:var(--soft-hover)}
.copy-btn.done{background:var(--solid-bg);color:var(--solid-fg)}
.prompt pre{margin:0;padding:16px 18px 18px;white-space:pre-wrap;word-break:break-word;font-family:var(--mono);font-size:13.5px;line-height:1.8;color:var(--text-strong)}
.prompt pre code{background:none;border:0;padding:0;font-size:inherit}

.proscons{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0}
.pc{background:var(--card);border-radius:16px;padding:18px 20px}
.pc-h{font-size:13px;font-weight:600;margin-bottom:6px}
.pc-pro .pc-h{color:var(--pro)}.pc-con .pc-h{color:var(--con)}
.pc ul{list-style:none;padding:0;margin:0}
.pc li{position:relative;padding-left:20px;font-size:15px;margin:6px 0}
.pc-pro li::before{content:"✓";position:absolute;left:0;color:var(--pro)}
.pc-con li::before{content:"×";position:absolute;left:2px;color:var(--con)}

.props{margin:22px 0;border-top:1px solid var(--border)}
.prop{display:grid;grid-template-columns:120px 1fr;gap:16px;padding:14px 0;border-bottom:1px solid var(--border)}
.prop dt{color:var(--muted);font-size:14px;padding-top:2px}
.prop dd{margin:0;color:var(--text);font-size:15.5px;word-break:break-word}

.table-wrap{margin:24px 0;overflow-x:auto;border-radius:16px;border:1px solid var(--border);background:var(--card-2)}
.prose table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:520px}
.prose th{text-align:left;font-weight:500;color:var(--muted);font-size:13px;padding:12px 16px;border-bottom:1px solid var(--border);background:rgb(var(--ink) / .02)}
.prose td{padding:12px 16px;border-bottom:1px solid var(--border);vertical-align:top}
.prose tr:last-child td{border-bottom:0}
.prose td:first-child{color:var(--fg);white-space:nowrap}

.flow{margin:24px 0;padding:24px;border-radius:var(--radius);background:var(--card)}
.flow-nodes{display:flex;align-items:stretch;gap:8px;flex-wrap:wrap}
.flow-node{flex:1;min-width:120px;background:var(--card-2);border:1px solid var(--border-2);border-radius:14px;padding:12px 14px}
.flow-node.is-person{border-color:rgba(154,215,255,.35)}
.flow-node.is-terminal{background:var(--solid-bg);border-color:var(--solid-bg)}
.flow-node.is-terminal .fn-label{color:var(--solid-fg)}
.fn-label{color:var(--fg);font-weight:500;font-size:14.5px}
.fn-detail{color:var(--muted);font-size:12.5px;line-height:1.5;margin-top:4px}
.flow-arrow{align-self:center;color:var(--muted)}
.flow-edges{list-style:none;padding:0!important;margin:16px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.flow-edges li{margin:0;font-size:12.5px;color:var(--muted-2);background:var(--card-2);border:1px solid var(--border);padding:4px 12px;border-radius:99px}
.flow-edges li.dashed{border-style:dashed;color:var(--con)}

.quote{margin:20px 0;padding:22px 24px;background:var(--card);border-radius:var(--radius)}
.quote blockquote{margin:0}
.quote blockquote p{margin:0;font-size:17px;color:var(--fg);line-height:1.75}
.quote blockquote p::before{content:"“";color:var(--accent);margin-right:2px}
.quote blockquote p::after{content:"”";color:var(--accent);margin-left:2px}
.quote figcaption{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;color:var(--muted)}
.q-who{color:var(--muted-2);font-weight:500}
.quote figcaption a{color:var(--muted);text-decoration:none;word-break:break-all}
.quote figcaption a:hover{color:var(--fg)}

.link-cards{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0}
.prose .link-card{position:relative;display:flex;flex-direction:column;gap:6px;padding:18px 44px 18px 20px;background:var(--card);border-radius:16px;text-decoration:none;transition:background .2s}
.prose .link-card:hover{background:var(--card-hover)}
.lc-title{color:var(--fg);font-size:15px;line-height:1.5}
.lc-meta{color:var(--muted);font-size:12.5px}
.lc-arrow{position:absolute;right:16px;top:16px;color:var(--muted);transition:transform .3s var(--ease),color .2s}
.link-card:hover .lc-arrow{color:var(--fg);transform:translate(2px,-2px)}

.steps{list-style:none;padding:0!important;margin:24px 0;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding:0 0 22px 52px;margin:0}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:32px;height:32px;border-radius:99px;background:var(--solid-bg);color:var(--solid-fg);font-size:14px;font-weight:600;display:grid;place-items:center}
.steps li:not(:last-child)::after{content:"";position:absolute;left:15.5px;top:38px;bottom:4px;width:1px;background:var(--border-2)}
.step-t{color:var(--fg);font-weight:500;line-height:32px}
.step-d{color:var(--muted-2);font-size:15px}

.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:80px}
.prose .pager-card{display:flex;flex-direction:column;gap:6px;padding:20px 24px;background:var(--card);border-radius:var(--radius);text-decoration:none}
.pager-card span{font-size:13px;color:var(--muted)}
.pager-card strong{color:var(--fg);font-weight:500;font-size:15px}
.pager-card.right{text-align:right}

/* ---------- 页脚 ---------- */
.site-footer{margin-top:96px;border-top:1px solid var(--border);padding:64px 0 40px;font-size:14px}
.footer-top{display:grid;grid-template-columns:1.3fr 1fr;gap:48px}
.footer-brand p{color:var(--muted-2);margin:16px 0 0;max-width:30em;line-height:1.7}
.footer-brand p.alt{color:var(--muted);font-size:13px;margin-top:8px}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.footer-cols h2{font-size:12px;font-weight:500;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin:4px 0 14px}
.footer-cols a{display:block;color:var(--muted-2);padding:4px 0;transition:color .15s}
.footer-cols a:hover{color:var(--fg)}
.disclaimer{margin-top:56px;padding:20px 24px;border-radius:var(--radius);background:var(--card-2);border:1px solid var(--border-2)}
.disclaimer p{margin:0;color:var(--text);line-height:1.7}
.disclaimer strong{color:var(--accent-text);font-weight:600}
.disclaimer .alt{color:var(--muted-2);margin-top:4px;font-size:13.5px}
.repo-line{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:12px!important;font-size:13px}
.repo-line svg{width:15px;height:15px;color:var(--muted-2)}
.repo-line a{color:var(--fg);text-decoration:underline;text-decoration-color:rgb(var(--ink) / .3);text-underline-offset:3px}
.repo-line span{color:var(--muted)}

/* ---------- 动效 ---------- */
.js .reveal{opacity:0;filter:blur(10px);transform:translateY(12px);transition:opacity .9s var(--ease),filter .9s var(--ease),transform .9s var(--ease)}
.js .reveal.in{opacity:1;filter:none;transform:none}
[data-split] .w{display:inline-block;opacity:0;transform:translateY(45%) rotateX(-40deg);transform-origin:50% 100%;transition:opacity .9s var(--ease),transform .9s var(--ease)}
[data-split]{perspective:1200px}
[data-split].in .w{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.js .reveal,[data-split] .w{opacity:1!important;filter:none!important;transform:none!important;transition:none!important}.dot,.typing span{animation:none}}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .doc-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .doc-aside{display:none}
  .prose{width:100%;justify-self:center}
  .faq-wrap{grid-template-columns:1fr;gap:16px}
  .feature-card{grid-template-columns:1fr;gap:28px}
  .fc-right{border-left:0;padding-left:0;border-top:1px solid rgb(var(--ink) / .06);padding-top:24px}
  .footer-top{grid-template-columns:1fr}
}
@media (max-width:760px){
  .nav-links{display:none}
  .nav{justify-content:space-between}
  .nav-toggle{display:inline-flex}
  .hide-sm{display:none}
  .mobile-menu:not([hidden]){display:flex;flex-direction:column;padding:8px 16px 16px;border-top:1px solid var(--border)}
  .mobile-menu a{padding:12px 8px;color:var(--text);border-bottom:1px solid rgb(var(--ink) / .04)}
  .hero{padding-top:88px}
  .page-hero{padding:80px 0 40px}
  .section{padding-top:88px}
  .showcase{grid-template-columns:1fr;margin-top:48px}
  .sc-side{display:flex;gap:6px;overflow-x:auto;border-right:0;border-bottom:1px solid var(--border);padding:12px;scrollbar-width:none}
  .sc-side-h{display:none}
  .sc-bot{flex:none;padding:6px 10px 6px 6px;background:rgb(var(--ink) / .03)}
  .sc-bot i{display:none}
  .sc-main{min-height:0}
  .msg{max-width:90%}
  .grid-2,.grid-3,.proscons,.link-cards,.pager{grid-template-columns:1fr}
  .card{min-height:0;padding:26px 24px 0}
  .feature-card{padding:28px 24px}
  .section-head.row{flex-direction:column;align-items:flex-start}
  .issue-row{grid-template-columns:1fr 20px;gap:4px 12px;padding:18px 2px}
  .ir-no{grid-column:1;order:-1}
  .ir-main{grid-column:1}
  .ir-date{display:none}
  .ir-go{grid-column:2;grid-row:1 / span 2}
  .prop{grid-template-columns:1fr;gap:4px}
  .flow-nodes{flex-direction:column}
  .flow-arrow{transform:rotate(90deg)}
  .footer-cols{grid-template-columns:repeat(3,1fr);gap:12px}
  .cta-band .container{border-radius:0}
  .prose{font-size:16px}
  .prose h2{font-size:24px;margin-top:56px}
  .anchor{display:none}
}
@media (max-width:420px){
  .container{padding:0 18px}
  .hide-xs{display:none}
  .nav-cta .btn-solid{padding:8px 14px}
}

/* ---------- 主题切换 / 语言切换 ---------- */
.theme-toggle{display:inline-flex;gap:2px;padding:3px;border-radius:999px;background:var(--soft);vertical-align:middle}
.theme-toggle button{all:unset;cursor:pointer;display:grid;place-items:center;width:28px;height:28px;border-radius:99px;color:var(--muted);transition:background .15s,color .15s}
.theme-toggle button:hover{color:var(--fg)}
.theme-toggle button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.theme-toggle svg{width:15px;height:15px}
[data-theme-pref=auto] [data-theme-set=auto],[data-theme-pref=light] [data-theme-set=light],[data-theme-pref=dark] [data-theme-set=dark],
html:not([data-theme-pref]) [data-theme-set=auto]{background:var(--bg);color:var(--fg);box-shadow:0 1px 2px rgb(0 0 0 / .12)}
.lang-switch{min-width:46px;font-weight:600}
.mm-row{display:flex;align-items:center;justify-content:space-between;padding:12px 8px 4px;color:var(--muted-2);font-size:14px}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}

/* ---------- 期刊：要点 / 问答 / 译文 ---------- */
.tldr{margin:0 0 40px;padding:22px 26px 18px;border-radius:var(--radius);background:var(--card);border:1px solid var(--border);border-left:3px solid var(--accent)}
.tldr-head{display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:4px 16px}
.prose .tldr h2{margin:0;font-size:19px;letter-spacing:0}
.tldr-head span{font-size:12.5px;color:var(--muted);font-family:var(--mono)}
.tldr ul{margin:12px 0 0;padding-left:1.2em}
.tldr li{margin:7px 0;font-size:15.5px;line-height:1.75}
.qa{margin-top:72px;padding-top:8px;border-top:1px solid var(--border)}
.prose .qa h2{margin-top:40px}
.prose .qa h3{font-size:18px;margin:28px 0 6px}
.prose .qa p{margin:0;color:var(--muted-2)}
.q-tr{margin-top:12px;padding-top:12px;border-top:1px dashed var(--border-2)}
.q-tr-label{display:block;font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);margin-bottom:4px;font-family:var(--mono)}
.q-tr p{margin:0;color:var(--muted-2);font-size:15.5px;line-height:1.75}
.lede-alt{font-size:14.5px;color:var(--muted);max-width:40em;margin:10px auto 0;line-height:1.7}
.footer-cols h2{font-size:12px;font-weight:600;letter-spacing:.08em;color:var(--muted);text-transform:uppercase;margin:4px 0 14px;font-family:var(--font)}
.showcase{box-shadow:0 40px 120px -40px var(--glow),0 0 0 1px rgb(var(--ink) / .02) inset}
[data-theme=light] .showcase{box-shadow:0 30px 80px -40px rgb(10 10 10 / .18),0 40px 120px -40px var(--glow)}
@media (max-width:760px){.mm-row .theme-toggle{background:var(--soft)}}

/* ---- Bot 头像 / bot avatars (lib/avatar.mjs) ---- */
.bot-av{flex:none;display:inline-block;vertical-align:middle;overflow:visible}
[data-theme=dark] .bot-av:is([data-color=black],[data-color=gray],[data-color=brown]){filter:drop-shadow(0 0 .6px rgb(255 255 255 / .55)) drop-shadow(0 0 5px rgb(255 255 255 / .08))}
@media (prefers-color-scheme:dark){:root:not([data-theme]) .bot-av:is([data-color=black],[data-color=gray],[data-color=brown]){filter:drop-shadow(0 0 .6px rgb(255 255 255 / .55))}}
.sc-bot .bot-av{width:30px;height:30px}
.mention{white-space:nowrap}
.mention .bot-av{width:1.05em;height:1.05em;margin:-.15em .2em 0 .1em}
.art-chips span{display:inline-flex;align-items:center;gap:6px}
.art-chips span .bot-av{margin-left:-6px}
.bot-name{display:inline-flex;align-items:center;gap:8px;white-space:nowrap}
.fn-label .bot-av{margin:-2px 7px 0 0}

/* ---- Hero 圆球 Bot / hero orb bot ---- */
.orb-bot{position:relative;width:88px;height:88px;max-width:88px;margin:0 auto 22px;animation:orb-in .8s cubic-bezier(.2,.8,.2,1) both}
.orb-svg{display:block;width:100%;height:100%;overflow:visible}
.orb-head{fill:var(--fg);transition:fill .6s}
.orb-eye{fill:var(--bg);transition:fill .6s,transform .09s ease-in;transform-box:fill-box;transform-origin:center}
.orb-ball,.orb-eyes{will-change:transform}
.orb-bot.blink .orb-eye{transform:scaleY(.12)}
@keyframes orb-in{from{opacity:0;transform:translateY(8px) scale(.94)}to{opacity:1;transform:none}}
@media (max-width:640px){.orb-bot{width:68px!important;height:68px!important;margin-bottom:18px!important}}
@media (prefers-reduced-motion:reduce){.orb-bot{animation:none}.orb-eye{transition:none}}

/* ---- 自查修复 / self-review fixes ---- */
.brand{white-space:nowrap;flex:none}
@media (max-width:900px){.nav-links a{padding:6px 9px}.anchor{display:none}}
.display,.prose h2,.prose h3,.ir-title,.pager-card strong{text-wrap:balance}
:lang(zh) .page-hero .display{word-break:keep-all;overflow-wrap:anywhere}