:root{color-scheme:light;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7;color:#172033;background:#f8fafc;--site-accent:#2563eb;--site-bg:#f8fafc;--site-surface:#fff;--site-soft:#f1f5f9;--site-text:#172033;--site-muted:#64748b;--site-border:#e2e8f0;--site-heading:#0f172a;--site-radius:18px;--site-shadow:0 16px 40px rgba(15,23,42,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:var(--site-bg);color:var(--site-text);text-rendering:optimizeLegibility}body.theme-editorial{--site-bg:#f7f4ee;--site-surface:#fffdf9;--site-soft:#efe9dd;--site-text:#3f352c;--site-muted:#75685e;--site-border:#e2d8c9;--site-heading:#251f1a;--site-radius:8px;--site-shadow:0 16px 40px rgba(63,53,44,.07);font-family:Georgia,"Noto Serif SC","Songti SC",serif}body.theme-minimal{--site-bg:#fff;--site-surface:#fff;--site-soft:#f6f6f4;--site-text:#292524;--site-muted:#6b6864;--site-border:#e7e5e4;--site-heading:#171717;--site-radius:0;--site-shadow:none;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
img{display:block;max-width:100%;height:auto}a{color:inherit}a:focus-visible{outline:3px solid var(--site-accent);outline-offset:3px}.container{width:min(1120px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;border-bottom:1px solid var(--site-border);background:var(--site-surface)}.site-header__inner{width:min(1120px,calc(100% - 40px));min-height:72px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--site-heading);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-weight:800;text-decoration:none}.brand-mark{width:38px;height:38px;display:inline-grid;place-items:center;border-radius:12px;background:var(--site-accent);color:#fff}.theme-editorial .brand-mark{border-radius:50%}.brand-logo{width:auto;max-width:160px;height:38px;object-fit:contain}.brand-name{font-size:18px}.site-nav{display:flex;align-items:center;justify-content:flex-end;gap:8px 22px;flex-wrap:wrap;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-size:14px}.site-nav a{color:var(--site-muted);font-weight:650;text-decoration:none}.site-nav a:hover{color:var(--site-accent)}
.hero-shell{border-bottom:1px solid var(--site-border);background:linear-gradient(180deg,var(--site-surface),var(--site-bg))}.hero{padding:clamp(64px,9vw,118px) 0 clamp(56px,8vw,92px)}.hero h1,.page-heading h1,.article-header h1{margin:0;color:var(--site-heading);line-height:1.15;letter-spacing:-.035em}.hero h1{max-width:840px;font-size:clamp(42px,7vw,76px)}.hero__lead{max-width:720px;margin:24px 0 30px;color:var(--site-muted);font-size:clamp(18px,2.2vw,22px)}.eyebrow{margin:0 0 10px;color:var(--site-accent);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase}.button{display:inline-flex;min-height:44px;align-items:center;padding:10px 18px;border-radius:999px;background:var(--site-accent);color:#fff;font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-weight:750;text-decoration:none}.hero .button{margin-top:30px}
.section-block{padding:66px 0 10px}.section-block--compact{padding-top:44px}.section-block--last{padding-bottom:74px}.section-heading{margin-bottom:24px;display:flex;align-items:flex-end;justify-content:space-between;gap:20px}.section-heading h2,.section-block h2{margin:0;color:var(--site-heading);font-size:clamp(26px,4vw,36px);line-height:1.2}.feature-grid,.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.article-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-grid--related{grid-template-columns:repeat(2,minmax(0,1fr))}.article-card{min-width:0;padding:28px;border:1px solid var(--site-border);border-radius:var(--site-radius);background:var(--site-surface)}.article-card:hover{border-color:var(--site-accent);box-shadow:var(--site-shadow)}.article-card h3{margin:8px 0 12px;color:var(--site-heading);font-size:22px;line-height:1.35}.article-card h3 a,.text-link{text-decoration:none}.article-card p:not(.article-card__meta){margin:0 0 16px;color:var(--site-muted)}.article-card__meta,.article-meta{color:var(--site-muted);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-size:13px}.text-link{color:var(--site-accent);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-size:14px;font-weight:750}
.topic-list{display:flex;flex-wrap:wrap;gap:10px}.topic-list--article{margin-top:22px}.topic-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--site-border);border-radius:999px;background:var(--site-surface);color:var(--site-muted);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-size:13px;text-decoration:none}.topic-chip:hover{border-color:var(--site-accent);color:var(--site-accent)}.topic-chip span{min-width:22px;height:22px;display:inline-grid;place-items:center;border-radius:999px;background:var(--site-soft);font-size:11px}.empty-state{padding:34px;border:1px dashed var(--site-border);border-radius:var(--site-radius);background:var(--site-surface);color:var(--site-muted)}
.page-main{padding-top:28px}.breadcrumb{margin-bottom:30px;color:var(--site-muted);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC",sans-serif;font-size:13px}.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none}.breadcrumb li:not(:last-child)::after{margin-left:8px;content:"/"}.breadcrumb a{text-decoration:none}.page-heading{max-width:780px;margin-bottom:38px}.page-heading h1{font-size:clamp(38px,6vw,60px)}.page-heading>p:last-child{color:var(--site-muted);font-size:18px}.pagination{margin:34px 0 0;display:flex;align-items:center;justify-content:center;gap:16px;color:var(--site-muted);font-size:13px}.pagination a{padding:8px 12px;border:1px solid var(--site-border);border-radius:10px;background:var(--site-surface);text-decoration:none}
.article-page{max-width:860px;margin:0 auto;padding:clamp(34px,6vw,70px);border:1px solid var(--site-border);border-radius:calc(var(--site-radius) + 4px);background:var(--site-surface);box-shadow:var(--site-shadow)}.article-header{margin-bottom:36px;padding-bottom:30px;border-bottom:1px solid var(--site-border)}.article-header h1{font-size:clamp(34px,5.4vw,58px)}.article-meta{margin-top:20px;display:flex;gap:10px 22px;flex-wrap:wrap}.content{overflow-wrap:anywhere;font-size:18px;line-height:1.9}.content>:first-child{margin-top:0}.content>:last-child{margin-bottom:0}.content h2,.content h3,.content h4{color:var(--site-heading);line-height:1.35}.content h2{margin-top:2.2em;font-size:30px}.content h3{margin-top:1.8em;font-size:24px}.content p,.content ul,.content ol,.content blockquote,.content pre,.content table{margin:1.2em 0}.content a{color:var(--site-accent)}.content blockquote{margin-left:0;padding:4px 0 4px 20px;border-left:4px solid var(--site-accent);color:var(--site-muted)}.content pre{max-width:100%;overflow-x:auto;padding:18px;border-radius:12px;background:#111827;color:#e5e7eb;font-size:14px}.content table{display:block;width:100%;max-width:100%;overflow-x:auto;border-collapse:collapse}.content th,.content td{padding:10px 12px;border:1px solid var(--site-border);text-align:left}
.article-adjacent{max-width:860px;margin:24px auto 0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.article-adjacent a{display:flex;min-width:0;flex-direction:column;gap:4px;padding:18px 20px;border:1px solid var(--site-border);border-radius:var(--site-radius);background:var(--site-surface);text-decoration:none}.article-adjacent a span{color:var(--site-muted);font-size:12px}.article-adjacent a strong{overflow:hidden;color:var(--site-heading);text-overflow:ellipsis;white-space:nowrap}.article-adjacent__next{text-align:right}.site-footer{margin-top:64px;border-top:1px solid var(--site-border);background:var(--site-surface)}.site-footer__inner{width:min(1120px,calc(100% - 40px));margin:0 auto;padding:38px 0;display:flex;align-items:flex-start;justify-content:space-between;gap:24px;color:var(--site-muted);font-size:14px}.site-footer__inner p{max-width:720px;margin:0}.site-footer__copyright{margin-left:auto;white-space:nowrap}
/* KAI-54 minimal: independent low-noise reading system. */
.theme-minimal .container{width:min(960px,calc(100% - 48px))}.theme-minimal .site-header{position:static;border-bottom:1px solid var(--site-border);background:#fff}.theme-minimal .site-header__inner{width:min(960px,calc(100% - 48px));min-height:62px;gap:28px}.theme-minimal .brand{gap:9px;font-weight:720;letter-spacing:-.01em}.theme-minimal .brand-mark{width:30px;height:30px;border-radius:2px;font-size:13px}.theme-minimal .brand-logo{max-width:148px;height:30px}.theme-minimal .brand-name{font-size:16px}.theme-minimal .site-nav{gap:8px 18px;font-size:13px}.theme-minimal .site-nav a{font-weight:520}.theme-minimal .site-nav a:hover{text-decoration:underline;text-underline-offset:4px}.theme-minimal .hero-shell{border-bottom:0;background:#fff}.theme-minimal .hero{max-width:760px;margin:0 auto;padding:72px 0 44px}.theme-minimal .hero .eyebrow{display:none}.theme-minimal .hero h1{max-width:720px;font-size:clamp(36px,5.4vw,54px);line-height:1.16;letter-spacing:-.035em}.theme-minimal .button{min-height:0;margin-top:24px!important;padding:0;border-radius:0;background:transparent;color:var(--site-accent);font-size:14px;font-weight:650;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:5px}.theme-minimal .section-block{max-width:760px;padding:48px 0 0}.theme-minimal .section-block--compact{padding-top:42px}.theme-minimal .section-block--last{padding-bottom:56px}.theme-minimal .section-heading{margin-bottom:12px;align-items:baseline}.theme-minimal .section-heading .eyebrow{display:none}.theme-minimal .section-heading h2,.theme-minimal .section-block h2{font-size:22px;line-height:1.35;letter-spacing:-.015em}.theme-minimal .feature-grid,.theme-minimal .article-grid,.theme-minimal .article-grid--related{display:block}.theme-minimal .article-card{padding:22px 0;border:0;border-bottom:1px solid var(--site-border);border-radius:0;background:transparent}.theme-minimal .article-card:first-child{padding-top:6px}.theme-minimal .article-card:hover{border-color:var(--site-border);box-shadow:none}.theme-minimal .article-card h3{margin:5px 0 8px;font-size:21px;line-height:1.42;letter-spacing:-.012em}.theme-minimal .article-card h3 a:hover{text-decoration:underline;text-underline-offset:4px}.theme-minimal .article-card p:not(.article-card__meta){max-width:680px;margin:0 0 9px;color:var(--site-muted);font-size:15px;line-height:1.72}.theme-minimal .article-card__meta{margin:0;color:var(--site-muted);font-size:12px}.theme-minimal .text-link{font-size:13px;font-weight:600;text-decoration:underline;text-underline-offset:4px}.theme-minimal .topic-list{gap:8px 17px}.theme-minimal .topic-list--article{margin-top:20px}.theme-minimal .topic-chip{gap:6px;padding:0;border:0;border-radius:0;background:transparent;font-size:13px;text-decoration:underline;text-decoration-color:#d6d3d1;text-underline-offset:4px}.theme-minimal .topic-chip:hover{border-color:transparent;text-decoration-color:currentColor}.theme-minimal .topic-chip span{min-width:0;height:auto;display:inline;background:transparent;color:var(--site-muted);font-size:11px}.theme-minimal .page-main{padding-top:30px}.theme-minimal .breadcrumb{max-width:760px;margin:0 auto 36px;font-size:12px}.theme-minimal .breadcrumb a:hover{text-decoration:underline;text-underline-offset:3px}.theme-minimal .page-heading{max-width:760px;margin:0 auto 24px}.theme-minimal .page-heading .eyebrow{display:none}.theme-minimal .page-heading h1{font-size:clamp(32px,5vw,46px);line-height:1.2}.theme-minimal .page-main>.article-grid,.theme-minimal .page-main>.pagination,.theme-minimal .page-main>.section-block{max-width:760px;margin-left:auto;margin-right:auto}.theme-minimal .pagination{margin-top:28px;gap:14px;justify-content:flex-start}.theme-minimal .pagination a{padding:5px 0;border:0;border-radius:0;background:transparent;text-decoration:underline;text-underline-offset:4px}.theme-minimal .article-page{max-width:720px;margin:0 auto;padding:18px 0 0;border:0;border-radius:0;background:#fff;box-shadow:none}.theme-minimal .article-header{margin-bottom:36px;padding-bottom:26px}.theme-minimal .article-header .eyebrow{display:none}.theme-minimal .article-header h1{font-size:clamp(36px,5.2vw,52px);line-height:1.2;letter-spacing:-.03em;overflow-wrap:anywhere}.theme-minimal .article-meta{margin-top:18px;gap:8px 18px;font-size:12px}.theme-minimal .content{max-width:720px;overflow-wrap:anywhere;word-break:normal;font-size:18px;line-height:1.88;color:#292524}.theme-minimal .content>:first-child{margin-top:0}.theme-minimal .content>:last-child{margin-bottom:0}.theme-minimal .content h2,.theme-minimal .content h3,.theme-minimal .content h4,.theme-minimal .content h5,.theme-minimal .content h6{color:var(--site-heading);font-weight:720;line-height:1.35;letter-spacing:-.018em;overflow-wrap:anywhere}.theme-minimal .content h2{margin:2.25em 0 .7em;font-size:30px}.theme-minimal .content h3{margin:2em 0 .65em;font-size:24px}.theme-minimal .content h4{margin:1.8em 0 .6em;font-size:20px}.theme-minimal .content h5{margin:1.65em 0 .55em;font-size:18px}.theme-minimal .content h6{margin:1.55em 0 .5em;color:var(--site-muted);font-size:16px}.theme-minimal .content p{margin:1.18em 0}.theme-minimal .content ul,.theme-minimal .content ol{margin:1.15em 0;padding-left:1.45em}.theme-minimal .content li{padding-left:.2em}.theme-minimal .content li+li{margin-top:.4em}.theme-minimal .content blockquote{margin:1.5em 0;padding:.05em 0 .05em 1em;border-left:3px solid #d6d3d1;color:#57534e}.theme-minimal .content a{color:var(--site-accent);overflow-wrap:anywhere;text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}.theme-minimal .content img{max-width:100%;height:auto;margin:1.6em auto}.theme-minimal .content figure{max-width:100%;margin:1.7em 0}.theme-minimal .content figcaption{margin-top:.55em;color:var(--site-muted);font-size:13px;line-height:1.5;text-align:center}.theme-minimal .content code{overflow-wrap:anywhere;padding:.12em .32em;border-radius:3px;background:var(--site-soft);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.9em}.theme-minimal .content pre{max-width:100%;overflow-x:auto;margin:1.5em 0;padding:17px 18px;border-radius:4px;background:#171717;color:#f5f5f4;font-size:14px;line-height:1.62;-webkit-overflow-scrolling:touch}.theme-minimal .content pre code{overflow-wrap:normal;padding:0;background:transparent;color:inherit;font-size:inherit}.theme-minimal .content table{display:block;width:100%;max-width:100%;overflow-x:auto;margin:1.5em 0;border-collapse:collapse;font-size:15px;line-height:1.55;-webkit-overflow-scrolling:touch}.theme-minimal .content th,.theme-minimal .content td{min-width:7.5em;padding:9px 11px;border:1px solid var(--site-border);text-align:left;vertical-align:top}.theme-minimal .content hr{margin:2.25em 0;border:0;border-top:1px solid var(--site-border)}.theme-minimal .article-adjacent{max-width:720px;margin:34px auto 0;gap:0;border-top:1px solid var(--site-border);border-bottom:1px solid var(--site-border)}.theme-minimal .article-adjacent a{padding:18px 0;border:0;border-radius:0;background:transparent}.theme-minimal .article-adjacent a+ a{padding-left:24px;border-left:1px solid var(--site-border)}.theme-minimal .article-adjacent a span{font-size:11px}.theme-minimal .article-adjacent a strong{overflow:visible;color:var(--site-heading);text-overflow:clip;white-space:normal;overflow-wrap:anywhere;font-size:14px;line-height:1.5}.theme-minimal .article-adjacent a:hover strong{text-decoration:underline;text-underline-offset:3px}.theme-minimal .page-main>.section-block.section-block--last{max-width:720px}.theme-minimal .site-footer{margin-top:72px;border-top:1px solid var(--site-border);background:#fff}.theme-minimal .site-footer__inner{width:min(960px,calc(100% - 48px));padding:28px 0;gap:18px;font-size:12px}.theme-minimal .site-footer__inner p{max-width:640px}.theme-minimal .site-footer__copyright{margin-left:auto}
body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .site-header,body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .site-footer{padding:1rem max(1rem,calc((100% - 960px)/2));background:#fff}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .site-header{position:static}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .site-header a{font-weight:700;text-decoration:none}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .site-footer{margin-top:3rem;color:#64748b}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .container{width:min(960px,calc(100% - 2rem))}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .article{padding:1.5rem;background:#fff;border:1px solid #e5e7eb;border-radius:.75rem}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .article h1{margin-top:0}body:not(.theme-default):not(.theme-editorial):not(.theme-minimal):not(.theme-magazine) .meta{color:#64748b}
@media (max-width:860px){.site-header{position:static}.site-header__inner{padding:14px 0;align-items:flex-start;flex-direction:column;gap:12px}.site-nav{justify-content:flex-start}.feature-grid,.article-grid,.article-grid--related{grid-template-columns:1fr}.article-page{padding:32px 26px}.theme-minimal .site-header__inner{padding:13px 0;gap:10px}.theme-minimal .article-page{padding:12px 0 0}.theme-minimal .article-adjacent{grid-template-columns:1fr}.theme-minimal .article-adjacent a+ a{padding-left:0;border-left:0;border-top:1px solid var(--site-border)}.theme-minimal .article-adjacent__next{text-align:left}}
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