:root{--bg:#faf9f5;--surface:#fff;--surface-2:#f3f1e9;--ink:#141413;--ink-2:#3d3d3a;--muted:#6f6d66;--faint:#a3a198;--line:#e6e3d8;--line-2:#d6d2c4;--accent:#d97757;--accent-ink:#b5532f;--accent-soft:#f6e7df;--on-accent:#fff;--grid:#1414130b;--shadow:0 1px 0 #14141308, 0 8px 28px -12px #1414131f;--serif:"Noto Serif SC", "Songti SC", "STSong", Georgia, serif;--sans:-apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;--mono:"JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;color-scheme:light}@media (prefers-color-scheme:dark){:root:not([data-theme=light]){--bg:#1c1b19;--surface:#252422;--surface-2:#2e2d2a;--ink:#f3f1ea;--ink-2:#d9d6cc;--muted:#a29f95;--faint:#77746b;--line:#35342f;--line-2:#45433d;--accent:#dd8563;--accent-ink:#e99a7a;--accent-soft:#3a2a23;--on-accent:#1c1b19;--grid:#f3f1ea0a;--shadow:0 1px 0 #0003, 0 10px 30px -14px #0009;color-scheme:dark}}:root[data-theme=dark]{--bg:#1c1b19;--surface:#252422;--surface-2:#2e2d2a;--ink:#f3f1ea;--ink-2:#d9d6cc;--muted:#a29f95;--faint:#77746b;--line:#35342f;--line-2:#45433d;--accent:#dd8563;--accent-ink:#e99a7a;--accent-soft:#3a2a23;--on-accent:#1c1b19;--grid:#f3f1ea0a;--shadow:0 1px 0 #0003, 0 10px 30px -14px #0009;color-scheme:dark}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased;flex-direction:column;min-height:100vh;margin:0;font-size:15px;line-height:1.6;display:flex}main{flex:1}a{color:inherit}img{max-width:100%;height:auto}::selection{background:var(--accent-soft);color:var(--ink)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px}.wrap{max-width:1120px;margin:auto;padding:0 24px}.narrow{max-width:760px}@media (width<=640px){.wrap{padding:0 16px}}.bar{z-index:30;background:color-mix(in srgb, var(--bg) 82%, transparent);-webkit-backdrop-filter:saturate(1.4)blur(14px);border-bottom:1px solid var(--line);position:sticky;top:0}.bar .wrap{align-items:center;gap:12px;height:56px;display:flex}.brand{letter-spacing:-.01em;align-items:center;gap:10px;font-size:16px;font-weight:600;text-decoration:none;display:flex}.logo{color:var(--ink);line-height:0;display:inline-flex}.logo svg{width:auto;height:100%;display:block}.brand .logo-wordmark{height:26px}.logo-mark{height:1em}.brand .tld{font-family:var(--mono);color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:11px;font-weight:400}.bar-nav{gap:2px;margin-left:auto;display:flex}.bar-nav a{color:var(--muted);white-space:nowrap;border-radius:8px;padding:6px 10px;font-size:14px;text-decoration:none;transition:color .15s,background .15s}.bar-nav a:hover{color:var(--ink);background:var(--surface-2)}.bar-nav a[aria-current=page]{color:var(--accent-ink);background:var(--accent-soft)}.lang{border:1px solid var(--line);background:var(--surface);border-radius:9px;flex:none;padding:2px;display:flex}.lang a{font-family:var(--mono);color:var(--muted);border-radius:7px;padding:4px 8px;font-size:12px;text-decoration:none}.lang a[aria-current=true]{background:var(--accent-soft);color:var(--accent-ink)}.lang a:hover{color:var(--ink)}.theme{border:1px solid var(--line);background:var(--surface);width:34px;height:34px;color:var(--ink-2);cursor:pointer;border-radius:9px;flex:none;place-items:center;display:grid}.theme:hover{border-color:var(--line-2)}.theme svg{width:16px;height:16px}@media (width<=640px){.bar .wrap{gap:8px}.brand .tld{display:none}.bar-nav a{padding:6px 7px;font-size:13px}}.hero{border-bottom:1px solid var(--line);position:relative;overflow:hidden}.hero:before{content:"";pointer-events:none;background-image:linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);background-size:32px 32px;position:absolute;inset:0;mask-image:radial-gradient(at 70% 30%,#000 30%,#0000 75%)}.hero .wrap{grid-template-columns:1fr auto;align-items:end;gap:40px;padding-top:84px;padding-bottom:64px;display:grid;position:relative}@media (width<=760px){.hero .wrap{grid-template-columns:1fr;padding-top:56px;padding-bottom:44px}.spark{display:none}}.eyebrow{font-family:var(--mono);letter-spacing:.14em;color:var(--muted);text-transform:uppercase;align-items:center;gap:10px;font-size:12px;display:flex}.eyebrow i{background:var(--accent);width:6px;height:6px;box-shadow:0 0 0 4px var(--accent-soft);border-radius:50%}.hero h1{font-family:var(--serif);letter-spacing:-.02em;margin:20px 0 18px;font-size:clamp(38px,7vw,72px);font-weight:600;line-height:1.06}.hero h1 em{color:var(--accent);font-style:normal}.hero p.lead{max-width:620px;color:var(--ink-2);margin:0;font-size:17px}.spark{width:clamp(120px,16vw,180px);height:auto;color:var(--ink)}.spark .brand-motion{width:100%;height:auto;display:block}@media (prefers-reduced-motion:no-preference){.spark .brand-motion{transform-origin:50%;animation:3s cubic-bezier(.45,0,.2,1) both brand-arrive}}@keyframes brand-arrive{0%{transform:perspective(600px)rotateY(0)}to{transform:perspective(600px)rotateY(360deg)}}.actions{flex-wrap:wrap;gap:10px;margin-top:28px;display:flex}.btn{border:1px solid var(--line);background:var(--surface);color:var(--ink);border-radius:10px;align-items:center;gap:8px;padding:9px 16px;font-size:14px;text-decoration:none;transition:border-color .15s,transform .15s;display:inline-flex}.btn:hover{border-color:var(--accent);transform:translateY(-1px)}.btn.primary{background:var(--accent);border-color:var(--accent);color:var(--on-accent)}.btn.primary:hover{background:var(--accent-ink);border-color:var(--accent-ink)}.page-head{border-bottom:1px solid var(--line)}.page-head .wrap{padding-top:56px;padding-bottom:36px}.page-head h1{font-family:var(--serif);letter-spacing:-.02em;margin:14px 0 10px;font-size:clamp(32px,5vw,48px);font-weight:600;line-height:1.15}.page-head p{color:var(--ink-2);max-width:640px;margin:0;font-size:16px}.section{margin:52px 0}.heading{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:baseline;gap:14px;margin-bottom:20px;padding-bottom:14px;display:flex}.heading .idx{font-family:var(--mono);color:var(--accent-ink);font-size:12px}.heading h2{font-family:var(--serif);letter-spacing:-.01em;margin:0;font-size:24px;font-weight:600}.heading .more{font-family:var(--mono);color:var(--muted);margin-left:auto;font-size:12px;text-decoration:none}.heading .more:hover{color:var(--accent-ink)}.grid{grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:14px;display:grid}.card{background:var(--surface);border:1px solid var(--line);border-radius:14px;flex-direction:column;gap:8px;padding:18px 18px 16px;text-decoration:none;transition:border-color .2s,box-shadow .2s,transform .2s;display:flex;position:relative}a.card:hover{border-color:var(--line-2);box-shadow:var(--shadow);transform:translateY(-2px)}.card h3{letter-spacing:-.01em;margin:0;font-size:17px;font-weight:600}.card p{color:var(--ink-2);margin:0;font-size:14px}.meta{font-family:var(--mono);color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;display:flex}.tag{font-family:var(--mono);color:var(--muted);background:var(--surface-2);border-radius:999px;padding:2px 8px;font-size:11px}.tag.accent{color:var(--accent-ink);background:var(--accent-soft)}.card .go{font-family:var(--mono);color:var(--accent-ink);margin-top:auto;padding-top:6px;font-size:12px}.empty{text-align:center;border:1px dashed var(--line-2);color:var(--muted);border-radius:14px;padding:48px 20px}.prose{color:var(--ink-2);padding:40px 0 72px;font-size:16px;line-height:1.8}.prose h2,.prose h3{font-family:var(--serif);color:var(--ink);letter-spacing:-.01em;line-height:1.3}.prose h2{margin:2em 0 .6em;font-size:26px}.prose h3{margin:1.6em 0 .5em;font-size:20px}.prose a{color:var(--accent-ink);text-underline-offset:3px}.prose code{font-family:var(--mono);background:var(--surface-2);border:1px solid var(--line);border-radius:5px;padding:.1em .35em;font-size:.88em}.prose pre{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px;font-size:14px;line-height:1.6;overflow-x:auto}.prose pre code{background:0 0;border:0;padding:0}.prose blockquote{border-left:3px solid var(--accent);color:var(--muted);margin:1.4em 0;padding:4px 18px}.prose hr{border:0;border-top:1px solid var(--line);margin:2.4em 0}.prose table{border-collapse:collapse;width:100%;font-size:14px}.prose th,.prose td{border:1px solid var(--line);text-align:left;padding:8px 10px}.prose img{border:1px solid var(--line);border-radius:12px}.note{border:1px solid var(--line);background:var(--surface);color:var(--muted);border-radius:12px;margin-top:20px;padding:12px 16px;font-size:14px}.note a{color:var(--accent-ink)}.foot{border-top:1px solid var(--line);color:var(--muted);font-size:13px}.foot .wrap{flex-wrap:wrap;align-items:center;gap:10px 22px;padding-top:22px;padding-bottom:28px;display:flex}.foot a{text-decoration:none}.foot a:hover{color:var(--accent-ink)}.foot .sp{font-family:var(--mono);margin-left:auto;font-size:12px}.story-feature{border:1px solid var(--line);border-left:4px solid var(--accent);background:var(--surface);border-radius:14px;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:32px;margin-top:32px;padding:28px 32px;display:grid}.story-feature h2{font-family:var(--serif);letter-spacing:-.02em;margin:10px 0;font-size:clamp(23px,3vw,32px);line-height:1.3}.story-feature p{color:var(--ink-2);max-width:660px;margin:0}.story-feature .tag{display:inline-block}.story-feature .btn{white-space:nowrap}.prose{overflow-wrap:anywhere;padding:40px 24px 72px}.prose .article-intro{border:1px solid var(--line);background:var(--surface);border-radius:14px;margin:0 0 32px;padding:22px 24px}.prose .article-intro p{margin:0 0 14px}.prose .article-intro p:last-child{margin-bottom:0}.prose .article-toc{background:var(--surface-2);border-radius:12px;margin:28px 0 36px;padding:18px 24px}.prose .article-toc ol{margin-bottom:0;padding-left:22px}.prose h2{scroll-margin-top:80px}.prose details{border:1px solid var(--line);background:var(--surface);border-radius:12px;margin:24px 0;padding:14px 18px}.prose summary{cursor:pointer;color:var(--accent-ink);font-size:14px}.prose figure{text-align:center;margin:22px 0 4px}.prose figure img{width:auto;max-height:640px;margin:auto;display:block}.prose figcaption{color:var(--muted);margin-top:10px;font-size:13px}@media (width<=640px){.story-feature{grid-template-columns:1fr;gap:20px;margin-top:24px;padding:22px}.story-feature .btn{justify-self:start}.prose{padding:28px 16px 48px}.prose .article-intro,.prose .article-toc{padding:18px}}.docx-article .prose{padding-top:40px}.docx-article .prose h1{font-family:var(--serif);color:var(--ink);margin:32px 0 24px;font-size:clamp(28px,4vw,42px);font-weight:600;line-height:1.35}.docx-article [data-source-block]{white-space:pre-wrap}.docx-article .prose figure{margin:32px 0}.docx-article .prose figure:first-child{margin-top:0}.docx-article .prose figure img{object-fit:contain;width:auto;max-width:100%;height:auto;max-height:none;margin:0 auto;display:block}.docx-article .prose ul,.docx-article .prose ol{padding-left:1.5em}.docx-article .prose li{margin:.5em 0}.tool-brand{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.tool-brand .logo-wordmark{height:30px}