:root{color-scheme:light;--bg:#f4f7fb;--surface:#ffffff;--surface-strong:#e8eef6;--surface-soft:#f8fafc;--text:#111827;--muted:#64748b;--border:#d7e0ec;--primary:#1f5fbf;--primary-strong:#17488f;--accent:#0b7a75;--accent-soft:#e6f5f1;--warning:#a15c07;--code-bg:#101828;--code-text:#eef2f6;--shadow:0 18px 44px rgba(17, 24, 39, 0.08)}:root[data-theme=dark]{color-scheme:dark;--bg:#0f131b;--surface:#171d29;--surface-strong:#232b3a;--surface-soft:#131924;--text:#f2f5f8;--muted:#a5b1c2;--border:#2d3748;--primary:#77a7ff;--primary-strong:#a9c7ff;--accent:#5ee0c2;--accent-soft:#16352f;--warning:#f7b955;--code-bg:#080b11;--code-text:#eef2f6;--shadow:0 16px 36px rgba(0, 0, 0, 0.28)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{position:relative;min-height:100vh;margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,segoe ui,sans-serif;line-height:1.75;letter-spacing:0}body::before{position:fixed;inset:0 0 auto;z-index:-1;height:360px;background:linear-gradient(180deg,color-mix(in srgb,var(--surface-strong) 82%,transparent),transparent),repeating-linear-gradient(90deg,color-mix(in srgb,var(--border) 34%,transparent) 0 1px,transparent 1px 96px);content:"";pointer-events:none}a{color:var(--primary);text-decoration:none}a:hover{color:var(--primary-strong);text-decoration:underline;text-underline-offset:3px}img{max-width:100%;height:auto}.site-header,.site-main,.site-footer{width:min(1240px,calc(100% - 40px));margin-inline:auto}.site-header{position:fixed;top:0;left:50%;z-index:20;display:flex;align-items:center;gap:26px;padding:14px 18px;border:1px solid color-mix(in srgb,var(--border) 78%,transparent);border-top:0;border-radius:8px;border-top-left-radius:0;border-top-right-radius:0;background:color-mix(in srgb,var(--surface) 86%,transparent);box-shadow:0 14px 34px rgba(17,24,39,7%);backdrop-filter:blur(18px);transform:translateX(-50%)}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text);font-weight:800;white-space:nowrap}.brand:hover{color:var(--text);text-decoration:none}.brand span{font-size:1rem;letter-spacing:.01em}.main-nav{display:flex;flex:1;justify-content:flex-end;align-items:center;gap:16px;font-size:.94rem}.main-nav a{padding:5px 0;border-bottom:2px solid transparent;color:var(--muted);white-space:nowrap}.main-nav a:hover{border-bottom-color:var(--primary);color:var(--text);text-decoration:none}.theme-toggle{display:inline-grid;width:36px;height:36px;flex:none;place-items:center;border:1px solid var(--border);border-radius:8px;background:var(--surface-soft);color:var(--text);cursor:pointer}.theme-toggle:hover{border-color:var(--primary)}.site-main{padding:142px 0 84px}.hero{display:grid;grid-template-columns:minmax(0,1fr);align-items:center;justify-items:center;min-height:360px;padding:42px 0 58px;border-bottom:1px solid var(--border);text-align:center}.hero-copy{max-width:880px;margin-inline:auto}.hero h1,.page-header h1,.article-header h1{margin:0;color:var(--text);line-height:1.08;letter-spacing:0}.hero h1{max-width:920px;font-size:clamp(3rem,7vw,5.2rem)}.hero-text{max-width:820px;margin:22px 0 0;margin-inline:auto;color:var(--muted);font-size:clamp(1.02rem,2vw,1.18rem)}.eyebrow{display:inline-flex;margin:0 0 14px;color:var(--accent);font-size:.88rem;font-weight:800}.hero-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-top:30px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 16px;border:1px solid var(--primary);border-radius:8px;background:var(--primary);color:#fff;font-weight:800}.button:hover{border-color:var(--primary-strong);background:var(--primary-strong);color:#fff;text-decoration:none}.button.ghost{border-color:var(--border);background:var(--surface);color:var(--text)}.section{padding:52px 0 0}.section-header{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:20px;padding-top:18px;border-top:1px solid color-mix(in srgb,var(--border) 78%,transparent)}.section-header h2{margin:0;font-size:1.5rem;line-height:1.25}.section-header a{font-weight:700}.post-list{display:grid;gap:16px}.post-card{position:relative;display:grid;gap:14px;padding:26px 28px;border:1px solid var(--border);border-left:4px solid transparent;border-radius:8px;background:color-mix(in srgb,var(--surface) 96%,var(--surface-soft));box-shadow:0 1px rgba(20,27,45,3%);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.post-card:hover{border-color:color-mix(in srgb,var(--primary) 52%,var(--border));border-left-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-2px)}.post-card>a{color:var(--text)}.post-card>a:hover{text-decoration:none}.post-card h2{margin:0;font-size:clamp(1.18rem,2vw,1.38rem);line-height:1.38}.post-card p{max-width:760px;margin:10px 0 0;color:var(--muted)}.meta{display:flex;flex-wrap:wrap;gap:8px 14px;color:var(--muted);font-size:.9rem}.tag-row{display:flex;flex-wrap:wrap;gap:8px;font-size:.9rem}.tag-row a,.tag-row span{display:inline-flex;align-items:center;min-height:28px;padding:0 8px;border:1px solid color-mix(in srgb,var(--accent) 24%,var(--border));border-radius:6px;background:var(--accent-soft);color:var(--accent);font-weight:700}.tag-row a:hover{border-color:var(--accent);text-decoration:none}.knowledge-grid,.series-grid,.term-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.knowledge-card{position:relative;display:grid;min-height:160px;align-content:start;gap:10px;padding:24px;overflow:hidden;border:1px solid var(--border);border-radius:8px;background:color-mix(in srgb,var(--surface) 96%,var(--surface-soft));color:var(--text);box-shadow:0 1px rgba(17,24,39,3%);transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}.knowledge-card::before{position:absolute;inset:0 0 auto;height:3px;background:var(--knowledge-accent,var(--primary));content:""}.knowledge-card:hover{border-color:color-mix(in srgb,var(--knowledge-accent,var(--primary)) 52%,var(--border));box-shadow:var(--shadow);text-decoration:none;transform:translateY(-2px)}.knowledge-icon{display:inline-grid;width:42px;height:42px;place-items:center;border-radius:8px;background:color-mix(in srgb,var(--knowledge-accent,var(--primary)) 14%,var(--surface));color:var(--knowledge-accent,var(--primary))}.knowledge-icon svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.9;stroke-linecap:round;stroke-linejoin:round}.knowledge-title{display:block;margin-top:6px;font-size:1.08rem;font-weight:850}.knowledge-card p{margin:0;color:var(--muted)}.knowledge-action{margin-top:auto;color:var(--knowledge-accent,var(--primary));font-size:.92rem;font-weight:800}.knowledge-card-0{--knowledge-accent:#3b6ff5}.knowledge-card-1{--knowledge-accent:#0891b2}.knowledge-card-2{--knowledge-accent:#8b5cf6}.knowledge-card-3{--knowledge-accent:#0f766e}.knowledge-card-4{--knowledge-accent:#f97316}.knowledge-card-5{--knowledge-accent:#64748b}.series-card,.term-card{display:block;min-height:132px;padding:22px;border:1px solid var(--border);border-radius:8px;background:color-mix(in srgb,var(--surface) 96%,var(--surface-soft));color:var(--text);transition:border-color .18s ease,transform .18s ease,box-shadow .18s ease}.series-card:hover,.term-card:hover{border-color:var(--primary);box-shadow:var(--shadow);transform:translateY(-2px);text-decoration:none}.series-card span,.term-card span{display:block;font-weight:850}.series-card p,.term-card small{display:block;margin:8px 0 0;color:var(--muted)}.term-card small{font-size:.95rem}.page-header{max-width:780px;margin-bottom:30px;padding-bottom:24px;border-bottom:1px solid var(--border)}.page-header h1{font-size:clamp(2.2rem,6vw,3.6rem)}.page-header p{color:var(--muted)}.article-shell{display:grid;grid-template-columns:minmax(0,980px);justify-content:center;align-items:start}.article-shell-with-toc{grid-template-columns:minmax(0,980px)}.article{width:100%;max-width:980px;min-width:0;margin:0 auto}.article-shell-with-toc .article{margin:0}.article-header{margin-bottom:28px;padding-bottom:24px;border-bottom:1px solid var(--border)}.article-header h1{font-size:clamp(2.35rem,5vw,4.2rem)}.article-description{margin:18px 0 0;color:var(--muted);font-size:1.1rem}.toc{position:fixed;top:110px;left:clamp(20px,3vw,48px);z-index:10;width:clamp(280px,20vw,360px);max-height:calc(100vh - 140px);overflow-y:auto;margin:0;padding:18px 20px;border:1px solid var(--border);border-radius:8px;background:color-mix(in srgb,var(--surface) 94%,transparent);box-shadow:0 12px 30px rgba(17,24,39,6%);backdrop-filter:blur(12px);scrollbar-gutter:stable}.toc strong{display:block;margin-bottom:8px}.toc nav{font-size:.94rem;line-height:1.6}.toc ul{margin:0;padding-left:17px}.toc li{margin:7px 0}.toc a{color:var(--muted)}.toc a:hover{color:var(--primary)}.content{color:color-mix(in srgb,var(--text) 92%,var(--muted));font-size:1.06rem}.content h2,.content h3{margin-top:38px;color:var(--text);line-height:1.35}.content h2{padding-top:8px;border-top:1px solid var(--border);font-size:1.58rem}.content h3{font-size:1.22rem}.content p,.content ul,.content ol,.content blockquote,.content pre,.content table{margin-top:18px;margin-bottom:18px}.content blockquote{padding:14px 20px;border-left:4px solid var(--primary);background:var(--surface-soft);color:var(--muted)}.content code{padding:.15em .35em;border-radius:6px;background:var(--surface-strong);font-family:jetbrains mono,fira code,Consolas,monospace;font-size:.92em}.content pre{overflow-x:auto;padding:18px;border-radius:8px;background:var(--code-bg);color:var(--code-text)}.content pre code{padding:0;background:0 0;color:inherit}.content table{width:100%;border-collapse:collapse;overflow:hidden}.content th,.content td{padding:10px 12px;border:1px solid var(--border);text-align:left}.content th{background:var(--surface-soft)}.article-footer{margin-top:42px;padding-top:24px;border-top:1px solid var(--border)}.series-note{margin-top:18px;padding:14px 16px;border:1px solid var(--border);border-radius:8px;background:var(--surface)}.post-nav{display:flex;justify-content:space-between;gap:16px;margin-top:22px}.post-nav a{max-width:48%;color:var(--muted);font-weight:700}.comments{margin-top:36px;padding-top:24px;border-top:1px solid var(--border)}.comments-title{margin:0 0 18px;font-size:1.25rem;line-height:1.3}.comments-placeholder{padding:18px;border:1px solid var(--border);border-radius:8px;background:var(--surface)}.search-box{display:grid;gap:8px;max-width:720px;margin-bottom:24px}.search-box span{font-weight:800}.search-box input{width:100%;min-height:48px;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font:inherit}.search-box input:focus{border-color:var(--primary);outline:3px solid color-mix(in srgb,var(--primary) 18%,transparent)}.muted{color:var(--muted)}.site-footer{padding:28px 0 44px;border-top:1px solid var(--border);color:var(--muted);font-size:.92rem}.site-footer p{margin:6px 0}.site-footer a{margin-right:12px;font-weight:700}.pagination{display:flex;gap:8px;justify-content:center;margin-top:28px;padding:0;list-style:none}.pagination a,.pagination span{display:inline-flex;min-width:36px;min-height:36px;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:8px;background:var(--surface)}@media(max-width:1500px){.article-shell,.article-shell-with-toc{display:block;max-width:980px;margin:0 auto}.toc{position:static;width:auto;max-height:none;overflow:visible;margin:28px 0}}@media(max-width:860px){.site-header{flex-wrap:wrap;gap:12px}.main-nav{order:3;width:100%;justify-content:flex-start;overflow-x:auto;padding-bottom:4px}.theme-toggle{margin-left:auto}.hero{min-height:auto}.series-grid,.knowledge-grid,.term-grid{grid-template-columns:1fr}.post-nav{display:grid}.post-nav a{max-width:none}}@media(max-width:520px){.site-header,.site-main,.site-footer{width:min(100% - 24px,1240px)}.site-main{padding:122px 0 56px}.site-header{top:8px;padding:10px 12px;border-top:1px solid color-mix(in srgb,var(--border) 78%,transparent);border-radius:8px}.brand span{font-size:.92rem}.hero{padding:36px 0 42px}.hero-actions{display:grid}.button{width:100%}.post-card{padding:20px}}