:root{color-scheme:light;--bg-base: #fff8ed;--bg-surface: #fffdf8;--bg-elevated: #f6ead9;--fg-primary: #07162b;--fg-secondary: #253040;--fg-tertiary: #6f6257;--border-subtle: #eadfcd;--border-default: #d8c7ac;--accent: #f0a72f;--accent-hover: #c46b1d;--accent-teal: #18b8aa;--accent-coral: #df6d4f;--navy-soft: #10233f;--shadow: 0 18px 45px rgba(7, 22, 43, .08);--max-width: 96rem;--reading-width: 45rem;--shell-gutter: 2rem;--font-mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "Cascadia Mono", "Segoe UI Mono", "JetBrains Mono", Menlo, Consolas, "Liberation Mono", "DejaVu Sans Mono", "Sarasa Mono SC", "Noto Sans Mono CJK SC", "Source Han Mono SC", monospace;font-family:Noto Sans SC,Source Han Sans SC,Microsoft YaHei,system-ui,sans-serif}@media(prefers-color-scheme:dark){:root{color-scheme:dark;--bg-base: #0d1117;--bg-surface: #161b22;--bg-elevated: #21262d;--fg-primary: #e6edf3;--fg-secondary: #b0b8c4;--fg-tertiary: #6e7681;--border-subtle: #30363d;--border-default: #484f58;--accent: #f0a72f;--accent-hover: #f5c542;--navy-soft: #1f2937;--shadow: 0 18px 45px rgba(0, 0, 0, .35)}}*,*:before,*:after{box-sizing:border-box}html{background:var(--bg-base);color:var(--fg-primary);overflow-x:hidden;scroll-behavior:smooth}body{margin:0;min-height:100vh;background:var(--bg-base);color:var(--fg-secondary);font-size:1rem;line-height:1.75;overflow-x:hidden}p,li,a,h1,h2,h3,h4,.brand-copy,.button,.focus-panel,.colcard,.post-card{overflow-wrap:anywhere}img,svg,video{max-width:100%}a{color:var(--accent-hover);text-decoration:none;background-image:linear-gradient(currentColor,currentColor);background-position:0% 100%;background-repeat:no-repeat;background-size:0% 1px;transition:background-size .25s ease,color .16s ease}a:hover{color:var(--fg-primary);background-size:100% 1px}a:focus-visible{outline:2px solid var(--accent-teal);outline-offset:4px}.shell{width:min(calc(100% - (var(--shell-gutter) * 2)),var(--max-width));margin:0 auto}.site-header{background:#fffdf8e0;border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:10;backdrop-filter:blur(14px)}@media(prefers-color-scheme:dark){.site-header{background:#0d1117e0;border-bottom-color:var(--border-subtle)}}.header-inner{display:flex;align-items:center;flex-wrap:wrap;justify-content:space-between;gap:clamp(2rem,5vw,5rem);padding:1.15rem 0;padding-right:0}.brand{display:inline-flex;align-items:center;gap:.85rem;color:var(--fg-primary);text-decoration:none;min-width:0;background:none}.brand:hover{background:none}.brand-mark{background:var(--fg-primary);border-radius:8px;display:grid;flex:0 0 auto;height:3rem;place-items:center;width:3rem}.brand-mark img,.hero-mark{display:block;height:100%;width:100%}.brand-copy{display:flex;flex-direction:column;line-height:1.18;min-width:0}.brand-copy span{color:var(--fg-primary);font-size:1.16rem;font-weight:750}.brand-copy small{color:var(--fg-tertiary);font-size:.78rem;font-weight:700}nav{display:flex;flex-wrap:wrap;column-gap:clamp(1.2rem,3vw,3rem);row-gap:.55rem;justify-content:flex-end;font-size:1.02rem;font-weight:700;margin-left:auto;min-width:0}nav a{color:var(--fg-secondary);background:none;display:block;padding:.15rem 0;border-bottom:2px solid transparent;text-decoration:none;transition:color .16s ease,border-color .16s ease}nav a:hover{color:var(--accent-hover);background:none}nav a.on{color:var(--fg-primary);border-bottom-color:var(--accent)}.main-content{min-height:calc(100vh - 13rem);padding:.75rem 0 5rem}.hero{max-width:var(--reading-width);margin-bottom:4.5rem}.home-hero{display:grid;grid-template-columns:minmax(22rem,.78fr) minmax(34rem,1.22fr);gap:clamp(3rem,5vw,5.6rem);align-items:center;max-width:100%;padding:3.35rem 0 2.45rem;border-bottom:1px solid var(--border-subtle)}.hero-main{align-self:start;min-width:0;padding-top:4.1rem}.home-hero .eyebrow{color:var(--accent);font-size:.85rem;font-weight:800;letter-spacing:.04em;margin:0 0 .6rem;text-transform:uppercase}.home-hero h1{font-size:5rem;font-weight:850;line-height:1.02;margin:0 0 1.15rem;color:var(--fg-primary)}.hero-subtitle{color:var(--fg-primary);font-size:1.62rem;font-weight:760;margin:0 0 1.25rem;line-height:1.42}.hero-subtitle span{display:block}.lead{color:var(--fg-tertiary);font-size:1.12rem;margin:0 0 1.8rem;max-width:39rem;line-height:1.75}.hero-aside{justify-self:end;max-width:48rem;padding-top:.2rem;width:100%}.focus-panel{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:8px;box-shadow:0 18px 42px #07162b14;color:var(--fg-primary);min-height:27rem;overflow:hidden;padding:2rem}.focus-panel>.eyebrow{color:var(--accent);font-size:1.26rem;font-weight:800;letter-spacing:0;margin:0 0 .5rem;text-transform:none}.marginal-chart{background:linear-gradient(145deg,#fffdf8,#f6ead9);border:0;border-radius:0;display:block;margin:.4rem 0 1.4rem;width:100%}.chart-grid path{fill:none;stroke:#d8c7ac8f;stroke-dasharray:2 5;stroke-width:1}.chart-axis path{fill:none;stroke:#07162b70;stroke-dasharray:5 7;stroke-linecap:round;stroke-width:2}.chart-axis marker path{fill:#07162b8f;stroke:none}.axis-label,.chart-label{font-family:Noto Sans SC,Source Han Sans SC,Microsoft YaHei,system-ui,sans-serif;font-weight:800}.axis-label{fill:var(--fg-tertiary);font-size:18px}.chart-label{font-size:19px}.demand-label{fill:#15968f}.supply-label{fill:#126bc7}.demand-curve,.supply-curve{fill:none;stroke-linecap:round;stroke-width:7}.demand-curve{stroke:var(--accent-teal)}.supply-curve{stroke:#1f8fff}.marginal-point circle:first-child{fill:#fffdf8;stroke:var(--accent);stroke-width:5}.marginal-point circle:last-child{fill:var(--accent)}.marginal-label{fill:var(--accent-hover);font-family:Noto Sans SC,Source Han Sans SC,Microsoft YaHei,system-ui,sans-serif;font-size:20px;font-weight:800}.actions{display:flex;flex-wrap:wrap;gap:.85rem}.hero-actions{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:.85rem}.hero-actions .button{justify-content:center}.button{align-items:center;background:var(--fg-primary);border:1px solid var(--fg-primary);border-radius:8px;color:var(--bg-surface);display:inline-flex;font-weight:750;min-height:2.8rem;padding:.58rem 1.1rem;text-decoration:none;background-image:none;transition:background-color .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}.button:hover{background:var(--navy-soft);color:var(--bg-surface);background-image:none;transform:translateY(-1px)}.button:active{transform:scale(.97);transition:transform .05s ease}.button.secondary{background:transparent;border-color:var(--border-default);color:var(--fg-primary)}.button.secondary:hover{background:var(--bg-elevated);color:var(--fg-primary)}.section{margin-bottom:3.75rem}.section-heading{align-items:baseline;border-bottom:1px solid var(--border-subtle);display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;margin-bottom:1.2rem;padding-bottom:.75rem}.section-heading h2{margin:0;font-size:1.6rem;color:var(--fg-primary)}.section-heading a{font-weight:700;text-decoration:none;background:none;color:var(--accent-hover)}.section-heading a:hover{background-image:linear-gradient(currentColor,currentColor);background-position:0% 100%;background-repeat:no-repeat;background-size:100% 1px}.num{font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace;font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}.st{display:inline-block;font-size:.74rem;font-weight:700;border-radius:4px;padding:.06rem .45rem;vertical-align:.12rem;margin-left:.5rem}.st.live{background:#e2f5f3;color:#0f7a70;border:1px solid #bfe6e1}.st.wip{background:#fdf1dd;color:var(--accent-hover);border:1px solid #f0dbb8}.st.lock{background:var(--bg-elevated);color:var(--fg-tertiary);border:1px dashed var(--border-default)}@media(prefers-color-scheme:dark){.st.live{background:#18b8aa29;color:#7fd8cf;border-color:#18b8aa66}.st.wip{background:#f0a72f29;color:var(--accent);border-color:#f0a72f66}}.sect{padding:3.6rem 0 0}.sect-head{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap;border-bottom:1px solid var(--border-subtle);padding-bottom:.75rem;margin-bottom:1.6rem}.sect-head h2{font-size:1.6rem}.sect-head a{font-weight:700}.cascade{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1.8rem;align-items:start}.cascade .col:nth-child(1){margin-top:4.5rem}.cascade .col:nth-child(2){margin-top:0}.cascade 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Mono,ui-monospace,Consolas,Liberation Mono,monospace;font-weight:700;color:var(--accent-hover);font-size:.92rem;flex:0 0 3.4rem}.idx .ti{color:var(--fg-primary);font-weight:650;min-width:0}.idx .dots{flex:1;border-bottom:2px dotted var(--border-default);transform:translateY(-.35rem);min-width:2rem}.idx .me{font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace;color:var(--fg-tertiary);font-size:.86rem;flex:0 0 auto;text-align:right}.idx a:hover{background:var(--bg-surface)}.idx a:hover .ti:before{content:"→ ";color:var(--accent);font-weight:800}.idx .plain{opacity:.62}.idx .plain .ti{font-weight:500}.vgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(19rem,100%),1fr));gap:1.8rem}.vcard{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:8px;overflow:hidden;box-shadow:0 12px 28px #07162b0d;display:flex;flex-direction:column;color:inherit;text-decoration:none;background-image:none;transition:border-color .18s 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var(--border-subtle);font-weight:800;color:var(--fg-primary);font-size:.95rem;background:var(--bg-elevated)}.eps .it{display:flex;gap:.7rem;align-items:baseline;padding:.7rem 1.1rem;border-bottom:1px solid var(--border-subtle);font-size:.92rem;color:inherit;text-decoration:none;background-image:none}.eps .it:last-child{border-bottom:0}.eps .it .n{font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace;color:var(--fg-tertiary);font-size:.8rem;flex:0 0 2.6rem}.eps .it.cur{background:#fdf6e8}.eps .it.cur .n{color:var(--accent-hover);font-weight:700}.eps .it .t{flex:1;color:var(--fg-primary);min-width:0}.eps .it .d{font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace;color:var(--fg-tertiary);font-size:.8rem}.eps .it.off{opacity:.6}.side-note{border:1px dashed var(--border-default);border-radius:8px;padding:1rem 1.1rem;font-size:.88rem;color:var(--fg-tertiary);margin-top:1.2rem;background:var(--bg-surface)}.intercept{max-width:44rem}.outline-preview{color:var(--fg-secondary);margin:.6rem 0 1.4rem;padding-left:1.4rem}.tgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(min(21rem,100%),1fr));gap:1.8rem}.tcard{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:8px;box-shadow:0 12px 28px #07162b0d;padding:1.5rem;display:flex;flex-direction:column;gap:.5rem;color:inherit;text-decoration:none;background-image:none;transition:border-color .18s ease,box-shadow .18s ease,transform .18s ease}a.tcard:hover{border-color:var(--border-default);transform:translateY(-3px);box-shadow:var(--shadow);background-image:none}.tcard-top{display:flex;justify-content:space-between;align-items:baseline}.tcard .no{font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace;color:var(--accent-hover);font-weight:700;font-size:.85rem}.tcard h3{font-size:1.2rem;font-weight:800}.tcard .tag{font-size:.8rem;color:var(--accent-hover);font-weight:700}.tcard .tag.muted{color:var(--fg-tertiary)}.tcard .d{color:var(--fg-tertiary);font-size:.92rem;flex:1}.tcard .ft{display:flex;justify-content:space-between;align-items:center;border-top:1px dotted var(--border-subtle);padding-top:.7rem;margin-top:.4rem;font-size:.84rem;color:var(--fg-tertiary);font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace}.tcard .ft.related a{font-weight:700}.tcard.off{border-style:dashed;background:transparent;box-shadow:none}.tcard.off h3{color:var(--fg-tertiary)}.tcard .why{font-size:.84rem;color:var(--fg-tertiary);background:var(--bg-elevated);border-radius:6px;padding:.55rem .8rem;margin-top:.3rem}.tool-lead{margin:.6rem 0 1.8rem}.tool-grid{display:grid;grid-template-columns:minmax(min(20rem,100%),.9fr) minmax(min(26rem,100%),1.1fr);gap:2rem;align-items:start}.panel-title{font-weight:800;color:var(--fg-primary);margin:0 0 .4rem}.panel-note{color:var(--fg-tertiary);font-size:.84rem;margin:.9rem 0 0}.f-row{display:grid;grid-template-columns:9.5rem 1fr 6.5rem;gap:.9rem;align-items:center;padding:.7rem 0;border-bottom:1px dotted var(--border-subtle)}.f-row label{font-weight:650;color:var(--fg-primary);font-size:.94rem}.f-row input[type=range]{width:100%;accent-color:var(--accent)}.f-row .u{font-family:SF Mono,JetBrains Mono,ui-monospace,Consolas,Liberation Mono,monospace;color:var(--fg-tertiary);font-size:.82rem;text-align:right}.presets{display:flex;gap:.5rem;flex-wrap:wrap;margin:.4rem 0 .2rem}.presets button{border:1px solid var(--border-default);background:var(--bg-surface);border-radius:6px;font-size:.8rem;font-weight:700;color:var(--fg-secondary);padding:.25rem .7rem;cursor:pointer;transition:border-color .15s ease,color .15s ease}.presets 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