@font-face{font-family:Fraunces Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/fraunces-vietnamese-full-normal.7BpKI3vF.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Fraunces Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/fraunces-latin-ext-full-normal.YHFkNujK.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Fraunces Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/fraunces-latin-full-normal.CFFu7zhK.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Archivo Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/archivo-vietnamese-wght-normal.XAtsl5Q_.woff2) format("woff2-variations");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Archivo Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/archivo-latin-ext-wght-normal.C4zznr8T.woff2) format("woff2-variations");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Archivo Variable;font-style:normal;font-display:swap;font-weight:100 900;src:url(/_astro/archivo-latin-wght-normal.E0tuGl4L.woff2) format("woff2-variations");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-mono-cyrillic-ext-400-normal.xuaO2J-f.woff2) format("woff2"),url(/_astro/ibm-plex-mono-cyrillic-ext-400-normal.DMdlQ8Kv.woff) format("woff");unicode-range:U+0460-052F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-mono-cyrillic-400-normal.BSMlKf0J.woff2) format("woff2"),url(/_astro/ibm-plex-mono-cyrillic-400-normal.CEL4l2ZJ.woff) format("woff");unicode-range:U+0301,U+0400-045F,U+0490-0491,U+04B0-04B1,U+2116}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-mono-vietnamese-400-normal.BulugwFq.woff2) format("woff2"),url(/_astro/ibm-plex-mono-vietnamese-400-normal.DDuiU_S-.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-mono-latin-ext-400-normal.BmRBH3aV.woff2) format("woff2"),url(/_astro/ibm-plex-mono-latin-ext-400-normal.D3D2R8hC.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/_astro/ibm-plex-mono-latin-400-normal.DMJ8VG8y.woff2) format("woff2"),url(/_astro/ibm-plex-mono-latin-400-normal.CvHOgSBP.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--paper: #faf7f2;--paper-sunk: #f2ede4;--paper-deep: #e9e2d5;--ink: #16130f;--ink-soft: #4a443c;--ink-faint: #6d665b;--rule: #ddd5c8;--rule-strong: #16130f;--vermilion: #c8442a;--vermilion-deep: #9e3320;--select: rgba(200, 68, 42, .14);--font-display: "Fraunces Variable", "Songti SC", "Source Han Serif SC", "Noto Serif SC", Georgia, serif;--font-body: "Archivo Variable", "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;--font-mono: "IBM Plex Mono", ui-monospace, Menlo, Monaco, Consolas, monospace;--text-xs: 12px;--text-sm: 14px;--text-base: 17px;--text-lg: 21px;--text-xl: 27px;--text-2xl: 36px;--display-1: clamp(52px, 9.5vw, 132px);--display-2: clamp(32px, 5vw, 64px);--display-3: clamp(21px, 2.4vw, 27px);--leading-body: 1.55;--leading-display: .92;--tracking-label: .14em;--measure: 68ch;--measure-tight: 52ch;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 24px;--space-6: 32px;--space-7: 48px;--space-8: 64px;--space-9: 96px;--shell-max: 1240px;--gutter: clamp(20px, 5vw, 72px);--col-gap: clamp(16px, 2vw, 32px);--grid-12: repeat(12, minmax(0, 1fr));--rhythm: clamp(72px, 11vw, 168px);--radius: 0;--hairline: 1px;--focus-ring: 0 0 0 2px var(--paper), 0 0 0 4px var(--vermilion);--ease: cubic-bezier(.2, .6, .2, 1);--dur-fast: .22s;--dur: .42s;--dur-slow: .9s}html[lang^=zh]{--measure: 34em;--measure-tight: 26em;--leading-body: 1.85;--leading-display: 1.18}*,*:before,*:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background-color:var(--paper);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='g'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23g)' opacity='0.055'/%3E%3C/svg%3E");background-repeat:repeat;color:var(--ink);font-family:var(--font-body);font-size:var(--text-base);line-height:var(--leading-body);font-variation-settings:"wght" 400;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}html[lang^=zh] body{letter-spacing:.012em}::selection{background:var(--select);color:var(--ink)}img,svg{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input,textarea{font:inherit;color:inherit}button{cursor:pointer;background:none;border:0;padding:0}p{margin:0;text-wrap:pretty}h1,h2,h3{margin:0;font-family:var(--font-display);line-height:var(--leading-display);text-wrap:balance}h1{font-size:var(--display-1);font-variation-settings:"wght" 450,"opsz" 144,"SOFT" 0,"WONK" 1;letter-spacing:-.032em;margin-left:-.055em}h2{font-size:var(--display-2);font-variation-settings:"wght" 450,"opsz" 96,"SOFT" 0,"WONK" 1;letter-spacing:-.022em;margin-left:-.04em}h3{font-size:var(--display-3);font-variation-settings:"wght" 500,"opsz" 36,"SOFT" 8,"WONK" 1;letter-spacing:-.012em}html[lang^=zh] h1,html[lang^=zh] h2,html[lang^=zh] h3{letter-spacing:.01em;margin-left:0}.lead{color:var(--ink-soft);font-size:clamp(19px,1.6vw,23px);line-height:1.5;max-width:var(--measure)}html[lang^=zh] .lead{line-height:1.8}.label,.eyebrow,.meta{font-family:var(--font-mono);font-size:var(--text-xs);font-weight:400;letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint);font-variant-numeric:tabular-nums}.eyebrow{margin:0;display:block}.label-ink{color:var(--ink)}.label-accent{color:var(--vermilion)}html[lang^=zh] .label,html[lang^=zh] .eyebrow,html[lang^=zh] .meta{text-transform:none;letter-spacing:.08em;font-family:var(--font-body);font-size:var(--text-sm)}.body-muted{color:var(--ink-soft);max-width:var(--measure)}.body-sm{color:var(--ink-soft);font-size:var(--text-sm);max-width:var(--measure)}.container{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--gutter)}.shell{width:100%;max-width:var(--shell-max);margin-inline:auto;padding-inline:var(--gutter);display:grid;grid-template-columns:var(--grid-12);column-gap:var(--col-gap);align-items:start}.section{padding-block:calc(var(--rhythm) * .5)}main>section:last-of-type{padding-bottom:var(--rhythm)}.stack{display:flex;flex-direction:column;gap:var(--space-5)}.row{display:flex;align-items:center;gap:var(--space-4)}.row-between{display:flex;align-items:center;justify-content:space-between;gap:var(--space-4)}main{counter-reset:chapter}.chapter{grid-column:1 / -1;display:grid;grid-template-columns:var(--grid-12);column-gap:var(--col-gap);padding-top:var(--space-6);border-top:1.5px solid var(--rule-strong);position:relative}.chapter:before{counter-increment:chapter;content:"§" counter(chapter,decimal-leading-zero);grid-column:1 / -1;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);color:var(--vermilion);margin-bottom:var(--space-6)}.chapter-head{grid-column:1 / span 7;display:flex;flex-direction:column;gap:var(--space-4)}.chapter-note{grid-column:9 / span 4;align-self:end;color:var(--ink-faint);font-size:var(--text-sm);line-height:1.6;border-top:var(--hairline) solid var(--rule);padding-top:var(--space-3)}.chapter-body{grid-column:1 / -1;margin-top:var(--space-8)}.rule{height:var(--hairline);background:var(--rule);border:0;margin:0;transform-origin:left center}.rule-strong{height:1.5px;background:var(--rule-strong)}.marginal{font-family:var(--font-mono);font-size:var(--text-xs);line-height:1.7;letter-spacing:.04em;color:var(--ink-faint);border-top:var(--hairline) solid var(--rule);padding-top:var(--space-3)}html[lang^=zh] .marginal{font-family:var(--font-body);font-size:var(--text-sm);letter-spacing:.02em;line-height:1.85}.link-ink{display:inline;background-image:linear-gradient(var(--vermilion),var(--vermilion));background-repeat:no-repeat;background-position:left 100%;background-size:0% 1px;padding-bottom:2px;transition:background-size var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease)}.link-ink:hover,.link-ink:focus-visible{background-size:100% 1px;color:var(--vermilion)}.btn{display:inline-flex;align-items:center;justify-content:center;align-self:flex-start;gap:.6em;min-height:46px;padding:11px 22px;border:var(--hairline) solid var(--ink);border-radius:var(--radius);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;line-height:1;transition:background var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease)}html[lang^=zh] .btn{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.08em}.btn-primary{background:var(--ink);color:var(--paper)}.btn-primary:hover{background:var(--vermilion);border-color:var(--vermilion)}.btn-secondary{background:transparent;color:var(--ink)}.btn-secondary:hover{border-color:var(--vermilion);color:var(--vermilion)}.btn-arrow:after{content:"→";font-size:1.15em;transition:transform var(--dur-fast) var(--ease)}.btn-arrow:hover:after{transform:translate(4px)}.btn:focus-visible,.input:focus-visible,.textarea:focus-visible,.lang-link:focus-visible,.link-ink:focus-visible,.index-row:focus-visible{outline:none;box-shadow:var(--focus-ring)}.topnav{position:sticky;top:0;z-index:20;background:var(--paper);border-bottom:var(--hairline) solid var(--rule)}.topnav-inner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-6);min-height:74px}.logo{display:inline-flex;align-items:baseline;gap:.55em;flex:0 0 auto;padding-block:12px}.brand-mark{display:block;width:19px;height:19px;color:var(--ink);transition:color var(--dur-fast) var(--ease)}.logo:hover .brand-mark{color:var(--vermilion)}.wordmark{display:flex;align-items:baseline;gap:.6em}.wordmark strong{font-family:var(--font-display);font-size:22px;font-variation-settings:"wght" 500,"opsz" 24,"SOFT" 0,"WONK" 1;letter-spacing:-.015em;line-height:1}.wordmark span{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint);line-height:1}html[lang^=zh] .wordmark span{font-family:var(--font-body);text-transform:none;letter-spacing:.08em;font-size:var(--text-sm)}.topnav nav{display:flex;align-items:baseline;gap:var(--space-6);margin-inline-start:auto}.topnav nav a{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint)}html[lang^=zh] .topnav nav a,html[lang^=zh] .lang-link,html[lang^=zh] .nav-cta{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.06em}.nav-actions{display:flex;align-items:baseline;gap:var(--space-5);flex:0 0 auto}.lang-toggle{display:inline-flex;align-items:baseline;gap:.5em;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.08em;color:var(--ink-faint)}.lang-link{color:var(--ink-faint);transition:color var(--dur-fast) var(--ease)}.lang-link:hover{color:var(--ink)}.lang-link[aria-current=true]{color:var(--vermilion);border-bottom:var(--hairline) solid var(--vermilion)}.lang-sep{color:var(--rule)}.nav-cta{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink);border-bottom:var(--hairline) solid var(--ink);padding-bottom:2px;transition:color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease)}.nav-cta:hover{color:var(--vermilion);border-color:var(--vermilion)}.hero{padding-top:clamp(48px,9vw,128px);padding-bottom:calc(var(--rhythm) * .5)}.hero-eyebrow{grid-column:1 / span 6;margin-bottom:var(--space-6)}.hero-marginal{grid-column:9 / span 4;margin-bottom:var(--space-6)}.hero-title{grid-column:1 / span 10;margin-bottom:var(--space-7)}.hero-lead{grid-column:1 / span 6;margin-bottom:var(--space-7)}.hero-actions{grid-column:1 / span 6;display:flex;flex-wrap:wrap;gap:var(--space-4);margin-bottom:var(--space-8)}.hero-keywords{grid-column:1 / -1;border-top:var(--hairline) solid var(--rule);padding-top:var(--space-3);display:flex;flex-wrap:wrap;gap:.5em .9em;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint)}html[lang^=zh] .hero-keywords{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.08em}.hero-keywords .sep{color:var(--rule)}.index{display:grid;gap:0;margin:0;padding:0;list-style:none;border-top:var(--hairline) solid var(--rule)}.index-row{display:grid;grid-template-columns:3.5rem minmax(0,1fr);column-gap:var(--space-5);padding-block:var(--space-6);border-bottom:var(--hairline) solid var(--rule);transition:background var(--dur-fast) var(--ease)}.index-row:hover{background:var(--paper-sunk)}.index-num{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.08em;color:var(--ink-faint);padding-top:.55em;font-variant-numeric:tabular-nums;transition:color var(--dur-fast) var(--ease)}.index-row:hover .index-num{color:var(--vermilion)}.index-head{display:flex;align-items:baseline;gap:var(--space-4);margin-bottom:var(--space-4)}.index-title{flex:0 0 auto;margin:0}.index-leader{flex:1 1 auto;min-width:2rem;align-self:stretch;background-image:radial-gradient(circle,var(--rule) 1px,transparent 1.2px);background-size:7px 7px;background-repeat:repeat-x;background-position:left bottom .42em}.index-status{flex:0 0 auto;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--vermilion);white-space:nowrap}html[lang^=zh] .index-status{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.08em}.index-copy{color:var(--ink-soft);max-width:var(--measure)}.index-points{display:flex;flex-wrap:wrap;gap:.4em 1.1em;margin-top:var(--space-4);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.06em;color:var(--ink-faint)}html[lang^=zh] .index-points{font-family:var(--font-body);font-size:var(--text-sm);letter-spacing:.04em}.index-points span:before{content:"— ";color:var(--rule)}.columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:var(--col-gap);row-gap:var(--space-7)}.column{border-top:1.5px solid var(--rule-strong);padding-top:var(--space-4);display:flex;flex-direction:column;gap:var(--space-3)}.column-num{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.08em;color:var(--vermilion);font-variant-numeric:tabular-nums}.column p{color:var(--ink-soft);font-size:var(--text-sm);line-height:1.7}html[lang^=zh] .column p{line-height:1.9}.pullquote{grid-column:1 / span 9;margin:var(--space-8) 0 0;font-family:var(--font-display);font-size:var(--display-2);font-variation-settings:"wght" 400,"opsz" 96,"SOFT" 12,"WONK" 1;line-height:1.12;letter-spacing:-.02em;text-indent:-.42em}html[lang^=zh] .pullquote{line-height:1.5;letter-spacing:.01em;text-indent:-.5em;font-size:clamp(26px,3.6vw,46px)}.pullquote-cite{grid-column:1 / span 9;display:block;margin-top:var(--space-5);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint);font-style:normal}html[lang^=zh] .pullquote-cite{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.08em}.pullquote-cite:before{content:"— "}.definitions{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));column-gap:var(--col-gap);row-gap:var(--space-6);margin-top:var(--space-9)}.definition{border-top:var(--hairline) solid var(--rule);padding-top:var(--space-4);display:flex;flex-direction:column;gap:var(--space-3)}.definition p{color:var(--ink-soft);max-width:var(--measure-tight)}.contact-grid{grid-column:1 / -1;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);column-gap:clamp(32px,6vw,96px);row-gap:var(--space-8);margin-top:var(--space-8)}.email-block{border-top:1.5px solid var(--rule-strong);padding-top:var(--space-4);display:flex;flex-direction:column;gap:var(--space-4);align-items:flex-start}.email-address{font-family:var(--font-display);font-size:clamp(21px,2.6vw,32px);font-variation-settings:"wght" 450,"opsz" 36,"SOFT" 0,"WONK" 1;letter-spacing:-.015em;word-break:break-all}.copy-email{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint);border-bottom:var(--hairline) solid var(--rule);padding-bottom:2px;transition:color var(--dur-fast) var(--ease),border-color var(--dur-fast) var(--ease)}.copy-email:hover{color:var(--vermilion);border-color:var(--vermilion)}html[lang^=zh] .copy-email{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.08em}.form{display:flex;flex-direction:column;gap:var(--space-6)}label{display:grid;gap:var(--space-2);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint)}html[lang^=zh] label{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.06em}.input,.textarea{width:100%;border:0;border-bottom:var(--hairline) solid var(--ink);border-radius:0;background:transparent;color:var(--ink);font-family:var(--font-body);font-size:var(--text-base);padding:var(--space-2) 0;transition:border-color var(--dur-fast) var(--ease)}.input::placeholder,.textarea::placeholder{color:var(--ink-faint);opacity:.7}.input:focus,.textarea:focus{outline:none;border-color:var(--vermilion)}.textarea{min-height:110px;resize:vertical;line-height:1.6}.form-status{display:none;color:var(--ink-soft);font-size:var(--text-sm)}.form-status.is-visible{display:block}.form-status a{color:var(--vermilion);border-bottom:var(--hairline) solid var(--vermilion)}.pagefoot{border-top:1.5px solid var(--rule-strong);padding-block:var(--space-7);color:var(--ink-faint);font-size:var(--text-sm)}.pagefoot-inner{display:flex;align-items:baseline;justify-content:space-between;flex-wrap:wrap;gap:var(--space-5)}.footlinks{display:flex;flex-wrap:wrap;gap:var(--space-5);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase}html[lang^=zh] .footlinks{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.06em}.footlinks a{color:var(--ink-faint);transition:color var(--dur-fast) var(--ease)}.footlinks a:hover{color:var(--vermilion)}.policy{max-width:62rem}.card{border-top:1.5px solid var(--rule-strong);padding-top:var(--space-6);background:transparent}.card>*+*{margin-top:var(--space-4)}.policy h1{font-size:clamp(38px,6vw,76px)}.policy h2{margin-top:var(--space-7);font-size:var(--text-xl);font-variation-settings:"wght" 500,"opsz" 30,"SOFT" 8,"WONK" 1}.policy p,.policy li{max-width:var(--measure)}.policy ul{margin:var(--space-3) 0 0;padding-left:1.2em;color:var(--ink-soft);list-style:none}.policy li{position:relative}.policy li:before{content:"—";position:absolute;left:-1.7em;color:var(--rule)}.policy li+li{margin-top:var(--space-2)}.legal-page{padding-block:var(--space-6) var(--space-9)}.legal-frame{max-width:58rem}.legal-shell{display:grid;gap:var(--space-5)}.legal-link-row{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-3);padding-bottom:var(--space-3);border-bottom:var(--hairline) solid var(--rule);color:var(--ink-faint);font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.06em}html[lang^=zh] .legal-link-row{font-family:var(--font-body);font-size:var(--text-sm);letter-spacing:.04em}.legal-divider{color:var(--rule)}.legal-inline-link{color:var(--ink-faint);transition:color var(--dur-fast) var(--ease)}.legal-inline-link:hover{color:var(--vermilion)}.legal-inline-link.is-active{color:var(--ink);border-bottom:var(--hairline) solid var(--vermilion)}.legal-hero-section{padding-block:var(--space-5) var(--space-7)}.legal-heading-block{gap:var(--space-4)}.legal-heading-block h1{font-size:clamp(34px,5.5vw,62px)}.legal-meta-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--space-5);border-top:var(--hairline) solid var(--rule);padding-top:var(--space-4)}.legal-meta-grid article{display:grid;gap:var(--space-1);align-content:start}.legal-meta-grid strong,.legal-meta-grid a{font-size:var(--text-base);font-weight:400;font-variation-settings:"wght" 500;color:var(--ink)}.legal-summary-note{max-width:var(--measure)}.legal-article-section{padding-top:0}.legal-article-card{display:grid;gap:var(--space-7);border-top:1.5px solid var(--rule-strong);padding-top:var(--space-6)}.legal-section-block{display:grid;gap:var(--space-4)}.legal-section-block h2{font-size:var(--text-xl);font-variation-settings:"wght" 500,"opsz" 30,"SOFT" 8,"WONK" 1}.legal-section-block+.legal-section-block{padding-top:var(--space-6);border-top:var(--hairline) solid var(--rule)}.legal-blocks{display:grid;gap:var(--space-3);color:var(--ink)}.legal-blocks p,.legal-blocks li{max-width:var(--measure)}.legal-blocks ul{margin:0;padding-left:1.7em;list-style:none}.legal-blocks li{position:relative}.legal-blocks li:before{content:"—";position:absolute;left:-1.7em;color:var(--rule)}.legal-blocks li+li{margin-top:var(--space-2)}.policy-note{padding-left:var(--space-4);border-left:1.5px solid var(--vermilion);color:var(--ink-soft)}.legal-footer-strip{display:flex;align-items:flex-start;flex-wrap:wrap;gap:var(--space-2);padding-top:var(--space-5);border-top:var(--hairline) solid var(--rule);color:var(--ink-faint);font-size:var(--text-sm)}.doc{max-width:44rem;margin-inline:auto;padding:clamp(28px,7vw,64px) clamp(20px,6vw,48px) clamp(56px,12vw,96px)}.doc-head{padding-bottom:var(--space-5);margin-bottom:var(--space-7);border-bottom:1.5px solid var(--rule-strong)}.doc-eyebrow{font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:var(--tracking-label);text-transform:uppercase;color:var(--ink-faint);margin-bottom:var(--space-4)}html[lang^=zh] .doc-eyebrow{font-family:var(--font-body);font-size:var(--text-sm);text-transform:none;letter-spacing:.08em}.doc-title{font-size:clamp(30px,7vw,48px)}.doc-meta{display:flex;flex-wrap:wrap;gap:.2em .6em;margin-top:var(--space-4);font-family:var(--font-mono);font-size:var(--text-sm);color:var(--ink-faint);font-variant-numeric:tabular-nums}html[lang^=zh] .doc-meta{font-family:var(--font-body)}.doc-meta-sep{color:var(--rule)}.doc-section+.doc-section{margin-top:var(--space-7)}.doc-section h2{font-size:clamp(19px,4.6vw,24px);font-variation-settings:"wght" 500,"opsz" 28,"SOFT" 8,"WONK" 1;letter-spacing:-.008em;margin-bottom:var(--space-4)}html[lang^=zh] .doc-section h2{letter-spacing:.01em}.doc-section p+p,.doc-section p+ul,.doc-section ul+p{margin-top:var(--space-3)}.doc-section ul{margin-bottom:0;padding-left:1.7em;list-style:none}.doc-section li{position:relative}.doc-section li:before{content:"—";position:absolute;left:-1.7em;color:var(--rule)}.doc-section li+li{margin-top:var(--space-2)}.doc-note{padding-left:var(--space-4);border-left:1.5px solid var(--vermilion);color:var(--ink-soft)}.doc-foot{display:flex;flex-direction:column;gap:var(--space-1);margin-top:var(--space-8);padding-top:var(--space-5);border-top:var(--hairline) solid var(--rule);font-family:var(--font-mono);font-size:var(--text-sm);color:var(--ink-faint)}html[lang^=zh] .doc-foot{font-family:var(--font-body)}.doc-mail{color:var(--ink-faint);text-decoration:underline;text-underline-offset:3px}@keyframes ink-rise{0%{opacity:0;transform:translateY(.4em);clip-path:inset(0 0 105% 0)}to{opacity:1;transform:none;clip-path:inset(-25% -25% -25% -25%)}}@keyframes fade-up{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}@keyframes rule-draw{0%{transform:scaleX(0)}to{transform:scaleX(1)}}[data-enter]{animation:fade-up var(--dur) var(--ease) both;animation-delay:calc(var(--i, 0) * 70ms)}[data-enter=title]{animation-name:ink-rise;animation-duration:var(--dur-slow)}[data-enter=rule]{animation-name:rule-draw;animation-duration:var(--dur-slow);transform-origin:left center}.js .reveal{opacity:0;transform:translateY(20px);transition:opacity var(--dur) var(--ease),transform var(--dur) var(--ease);transition-delay:calc(var(--i, 0) * 60ms)}.js .reveal.is-revealed{opacity:1;transform:none}.js .chapter{background-image:linear-gradient(var(--rule-strong),var(--rule-strong));background-repeat:no-repeat;background-origin:border-box;background-position:left top;background-size:0 1.5px;border-top-color:transparent;transition:background-size var(--dur-slow) var(--ease)}.js .chapter.is-revealed{background-size:100% 1.5px}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}[data-enter],[data-enter=title],[data-enter=rule]{animation:none}.js .reveal{opacity:1;transform:none;transition:none}.js .chapter{background-size:100% 1.5px;transition:none}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}@media(max-width:1080px){.hero-title{grid-column:1 / -1}.hero-lead,.hero-actions,.hero-eyebrow{grid-column:1 / span 8}.hero-marginal{grid-column:9 / span 4}.chapter-head{grid-column:1 / span 8}.chapter-note{grid-column:1 / -1;align-self:start;margin-top:var(--space-5)}.pullquote,.pullquote-cite{grid-column:1 / -1}}@media(max-width:860px){.topnav-inner{flex-wrap:wrap;padding-block:var(--space-4);gap:var(--space-4)}.topnav nav{order:3;width:100%;margin-inline-start:0;overflow-x:auto;gap:var(--space-5);padding-bottom:2px;scrollbar-width:none}.topnav nav::-webkit-scrollbar{display:none}.nav-actions{margin-inline-start:auto}.columns,.contact-grid,.definitions{grid-template-columns:1fr}.legal-meta-grid{grid-template-columns:1fr;gap:var(--space-4)}}@media(max-width:640px){:root{--display-1: clamp(40px, 12vw, 60px)}.hero-eyebrow,.hero-marginal,.hero-lead,.hero-actions{grid-column:1 / -1}.hero-marginal{margin-bottom:var(--space-5)}.chapter-head{grid-column:1 / -1}.index-row{grid-template-columns:1fr;row-gap:var(--space-3)}.index-num{padding-top:0}.index-head{flex-wrap:wrap;gap:var(--space-2)}.index-leader{display:none}.index-status{order:-1;flex-basis:100%}.nav-cta{display:none}.legal-footer-strip{flex-direction:column}}