@font-face{font-family:LongformTitle;src:url('/assets/title.woff2') format('woff2');font-weight:600;font-style:normal;font-display:swap}
:root{color-scheme:light;--ink:#161616;--muted:#555555;--line:#dedede;--control:#767676;--paper:#ffffff;--button:#111111;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper);font-size:16px}
*{box-sizing:border-box}body{margin:0;line-height:1.7}a{color:inherit;text-underline-offset:4px;text-decoration-thickness:1px}button,select{font:inherit;color:inherit}button,summary,select{cursor:pointer}a,button,summary,select{-webkit-tap-highlight-color:#dedede}a:focus-visible,button:focus-visible,summary:focus-visible,select:focus-visible{outline:2px solid var(--ink);outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2{font-family:LongformTitle,"Songti SC",SimSun,serif;font-weight:600}h1{font-size:3.25rem;line-height:1.24;letter-spacing:-.035em}h2{font-size:2rem;line-height:1.35;letter-spacing:-.015em}h3{font-size:1.25rem;line-height:1.45;font-weight:600}p+p{margin-top:12px}strong{font-weight:600}[hidden]{display:none!important}.wrap{width:calc(100% - 96px);max-width:1200px;margin-inline:auto}.site-header{min-height:88px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:baseline;gap:16px;text-decoration:none;white-space:nowrap}.brand>span:first-child{font-family:LongformTitle,SimSun,serif;font-size:1.5rem;font-weight:600;letter-spacing:.06em}.brand-en{font-size:.875rem;color:var(--muted);letter-spacing:.04em}nav{display:flex;gap:28px}nav a,.footer-links a{display:inline-flex;align-items:center;min-height:44px}.skip{position:absolute;left:20px;top:-100px;background:var(--paper);padding:12px;z-index:2}.skip:focus{top:10px}.hero{display:grid;grid-template-columns:minmax(0,384px) minmax(0,1fr);gap:48px;align-items:start;padding:52px 0 80px}.hero-copy{padding-top:4px}.status{font-size:.875rem;line-height:1.8;color:var(--muted);margin-bottom:22px}.lead{font-size:1.125rem;line-height:1.7;margin-top:24px}.cta-group{margin-top:24px}.primary{display:inline-flex;justify-content:space-between;gap:48px;align-items:center;min-height:50px;padding:12px 22px;background:var(--button);color:var(--paper);border-radius:4px;text-decoration:none;font-size:1rem}.primary:hover{background:#333333}.trust-note,.access-note{font-size:.875rem;line-height:1.6;color:var(--muted)}.trust-note{margin-top:10px}.trust-note a{display:inline-block;min-height:44px;line-height:44px;margin-top:-10px;margin-bottom:-10px}.access-note{margin-top:3px}.example{container-type:inline-size;min-width:0;border-top:2px solid var(--ink);padding-top:16px}.eyebrow,.small{font-size:.875rem;line-height:1.6;color:var(--muted)}.example-heading h2{font-family:inherit;font-size:1.25rem;line-height:1.5;margin-top:7px;font-weight:600;letter-spacing:0}.preview-note{padding:10px 12px;margin:14px 0 12px;border-left:3px solid var(--ink);background:#f5f5f5;font-size:.875rem;line-height:1.6}.preview-note p{margin-top:3px;color:var(--muted)}.direction{margin-bottom:10px}.input-excerpt{font-size:1rem;border-bottom:1px solid var(--line);padding-bottom:12px}.input-excerpt>strong{font-size:.875rem}.input-excerpt p{margin-top:3px}.section-label{font-size:.875rem;margin:12px 0 8px}.model-tabs{display:flex;overflow-x:auto;gap:8px;padding:4px 4px 10px;scrollbar-width:thin}.model-tabs button{flex-shrink:0;border:1px solid var(--control);background:var(--paper);min-height:44px;padding:8px 14px;border-radius:3px;white-space:nowrap}.model-tabs button[aria-selected=true]{background:var(--ink);color:var(--paper);border-color:var(--ink);text-decoration:underline;text-underline-offset:4px}.dual-controls{display:none;gap:24px}.dual-controls label{min-width:0;flex:1;font-size:.875rem;color:var(--muted)}select{display:block;width:100%;min-height:44px;border:1px solid var(--control);border-radius:3px;background:var(--paper);padding:8px;margin-top:4px}.outputs{display:grid;gap:20px}.output{border-top:1px solid var(--line);padding-top:16px;min-width:0}.output h3{font-size:1rem;margin-bottom:10px}.excerpt,.full-text{white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.75}.excerpt{font-size:1rem}.excerpt p,.full-text p{margin:0}.excerpt>*+*,.full-text>*+*{margin-top:10px}.excerpt h4,.full-text h4{font-size:1rem;line-height:1.5;font-weight:600}.excerpt>*+h4,.full-text>*+h4{margin-top:16px}.full-text h4[data-level="1"]{font-size:1.125rem}.count{margin-top:16px}.count+p{margin-top:4px}.full-example{margin-top:12px}.full-example>.small,.full-example section>.small{overflow-wrap:anywhere}.generated{padding-top:10px;border-top:1px solid var(--line);margin-top:10px}summary{min-height:44px;padding:10px 0;text-decoration:underline;text-underline-offset:4px;line-height:1.6}details .full-text{padding:12px 0}details section{padding:16px 0}.full-example summary{font-size:1rem}.section{padding:80px 0;border-top:1px solid var(--line)}.section-intro{display:grid;grid-template-columns:80px 1fr;gap:16px}.section-number{display:block;font-size:.875rem;color:var(--muted);letter-spacing:.06em;margin:6px 0 18px}.section-intro p{max-width:690px;margin-top:18px}.steps{list-style:none;padding:0;margin:40px 0 32px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:32px}.steps li{position:relative;border-top:1px solid var(--control);padding-top:18px}.step-number{font-size:.875rem;color:var(--muted)}.steps h3{margin-top:14px}.steps p{margin-top:10px}.mechanism-summary{max-width:760px}.mechanism-summary p+p{margin-top:4px}.roster{margin-top:24px!important;max-width:900px}.split{display:grid;grid-template-columns:360px minmax(0,1fr);gap:48px}.split>div>h2{max-width:340px}.split h3+p{margin-top:12px}.scope{font-size:.875rem;color:var(--muted);margin-top:16px}.additional-direction{border-top:1px solid var(--line);margin:28px 0;padding-top:24px}.additional-direction h3{font-size:1.125rem}.trust-row{display:grid;grid-template-columns:100px 1fr;gap:24px;padding:24px 0;border-bottom:1px solid var(--line)}.trust-row:first-child{padding-top:0}.trust-row h3{font-size:1.125rem}.trust-row p{margin:0!important}.text-link{display:inline-flex;align-items:center;min-height:44px;margin-top:16px}.faq details{border-bottom:1px solid var(--line)}.faq details:first-child{border-top:1px solid var(--line)}.faq summary{font-weight:500;text-decoration:none;padding:19px 30px 19px 0;position:relative;list-style:none}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';position:absolute;right:2px;top:18px;font-size:1.2rem}.faq details[open] summary:after{content:'−'}.faq-answer{padding:0 0 24px;color:var(--muted)}.action{max-width:none}.action>p{max-width:680px;margin-top:20px}.action .cta-group{margin-top:28px}.site-footer{border-top:1px solid var(--ink);display:flex;justify-content:space-between;gap:32px;padding-top:32px;padding-bottom:40px}.footer-brand{font-size:1rem;font-weight:600}.site-footer p{font-size:.875rem;color:var(--muted);margin-top:8px}.footer-links{display:flex;gap:24px}.footer-meta{text-align:right}.data-page{max-width:800px;padding-bottom:72px}.data-page h1{font-size:2.75rem;margin:24px 0}.data-page>p{color:var(--muted)}.data-page section{margin-top:48px}.data-page h2{font-size:1.75rem;margin-bottom:24px}.data-page dl{margin:0}.data-page dl>div{display:grid;grid-template-columns:170px 1fr;gap:20px;border-bottom:1px solid var(--line);padding:18px 0}.data-page dt{font-weight:600}.data-page dd{margin:0;overflow-wrap:anywhere}
@container (min-width:600px){.enhanced .dual-controls{display:flex}.enhanced .model-tabs{display:none}.enhanced .outputs{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1200px) and (max-width:1359px){.hero,.split{gap:32px;grid-template-columns:384px minmax(0,1fr)}}
@media(max-width:1199px){.wrap{width:calc(100% - 64px)}.hero{grid-template-columns:1fr;gap:40px;padding-top:40px}.hero-copy{max-width:730px}.hero h1{max-width:700px}.split{grid-template-columns:280px minmax(0,1fr);gap:32px}.steps{gap:24px}}
@media(max-width:719px){.wrap{width:calc(100% - 40px)}.site-header{min-height:64px}.brand>span:first-child{font-size:1.25rem}.brand-en,.nav-demo{display:none}nav{gap:0;font-size:.875rem}.hero{padding:28px 0 48px;gap:24px}.status{margin-bottom:16px;font-size:.875rem;line-height:1.7}h1{font-size:2.25rem;line-height:1.25;letter-spacing:-.025em}h2{font-size:1.75rem;line-height:1.35}h3{font-size:1.125rem}.lead{font-size:1.0625rem;line-height:1.65;margin-top:16px}.cta-group{margin-top:20px}.primary{width:100%;min-height:50px;justify-content:center;position:relative;gap:24px}.trust-note{margin-top:8px}.example{padding-top:14px}.example-heading h2{font-size:1.125rem;margin-top:6px}.preview-note{margin-top:12px}.section{padding:48px 0}.section-intro{display:block}.section-number{margin:0 0 14px}.section-intro p{margin-top:16px}.steps{display:block;margin:28px 0}.steps li{padding:20px 0 20px 46px}.step-number{position:absolute;left:0;top:20px}.steps h3{margin:0}.steps p{margin-top:8px}.split{display:block}.split>div+div{margin-top:28px}.split>div>h2{max-width:none}.trust-row{display:block;padding:22px 0}.trust-row p{margin-top:10px!important}.site-footer{display:block;padding-top:28px;padding-bottom:32px}.footer-meta{text-align:left;margin-top:20px}.footer-links{gap:20px}.data-page{padding-bottom:48px}.data-page h1{font-size:2.25rem}.data-page dl>div{display:block}.data-page dd{margin-top:8px}.action>p{margin-top:16px}}
@media(max-width:359px){.wrap{width:calc(100% - 32px)}h1{font-size:2.125rem}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

@media(min-width:720px) and (max-width:900px){.split{display:block}.split>div+div{margin-top:28px}.split>div>h2{max-width:none}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}}

.title-phrase{display:inline-block;max-width:100%}

.brand{min-height:44px}

.provider-policy{margin-top:32px;border-top:1px solid var(--ink);padding-top:24px}.provider-policy>.small{margin-top:14px}.policy-sources a{display:block;min-height:44px;padding-block:8px}.policy-date{margin-top:48px!important;padding-top:24px;border-top:1px solid var(--line)}.footer-meta{min-width:0}.site-footer p{overflow-wrap:anywhere}

/* Stitch 4a803cd / 66d21d9: source copy and font families remain authoritative.
   Keep the light canvas in sync with longform-era/app/globals.css. */
:root {
  --brand-canvas-light: #f7f6f3;
  --canvas: var(--brand-canvas-light);
  --ink: #1d1d1f;
  --muted: #555555;
  --line: rgb(0 0 0 / 9%);
  --soft: #f5f5f5;
  --button: #1c1c1e;
  --shadow-card: 0 2px 8px rgb(0 0 0 / 4%), 0 1px 2px rgb(0 0 0 / 2%);
  background: var(--canvas);
}
html { scroll-padding-top: 96px; }
body { background: var(--canvas); }
.wrap { max-width: 1360px; }
.site-header { position: sticky; top: 0; z-index: 20; min-height: 72px; background: var(--canvas); box-shadow: inset 0 1px 0 rgb(255 255 255 / 65%); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 72px; }
.brand { gap: 12px; }
.brand>span:first-child { font-size: 1.25rem; letter-spacing: .02em; }
.brand-en { font-size: .875rem; }
nav { font-size: .875rem; }
.skip { z-index: 30; }
.hero { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; padding: 56px 0 80px; }
.hero-copy { max-width: 460px; }
.status { display: block; padding: 10px 14px; border-radius: 12px; background: rgb(0 0 0 / 4%); font-size: .875rem; line-height: 1.7; margin-bottom: 28px; }
h1 { font-size: 2.75rem; line-height: 1.35; letter-spacing: -.025em; }
h2 { font-size: 2rem; line-height: 1.4; }
.lead { margin-top: 20px; }
.primary { border-radius: 10px; min-height: 52px; box-shadow: 0 3px 10px rgb(0 0 0 / 12%); transition: background 140ms ease, box-shadow 140ms ease; }
.primary:hover { background: #000000; box-shadow: 0 4px 14px rgb(0 0 0 / 16%); }
.primary:active { box-shadow: 0 1px 3px rgb(0 0 0 / 8%); }
.example { padding: 24px; border: 1px solid var(--line); border-radius: 20px; background: var(--paper); box-shadow: var(--shadow-card); }
.example-heading { padding: 12px 14px; margin-bottom: 12px; border-radius: 10px; background: var(--soft); }
.example-heading h2 { font-size: 1.125rem; }
.direction { margin: 0 0 14px; }
.input-excerpt { padding: 14px 16px 4px; border: 0; border-radius: 10px; background: var(--soft); }
.section-label { margin: 18px 0 12px; }
.model-tabs { gap: 6px; margin-bottom: 14px; padding: 6px; border: 1px solid var(--line); border-radius: 10px; background: var(--soft); }
.model-tabs button { padding: 8px 12px; border-color: transparent; border-radius: 7px; background: transparent; }
.model-tabs button:hover { background: #e8e8e8; }
.model-tabs button[aria-selected=true] { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.dual-controls { gap: 16px; margin-bottom: 16px; }
select { border-radius: 8px; padding: 10px 12px; }
.outputs { gap: 16px; }
.output { border: 1px solid var(--line); border-radius: 10px; padding: 16px; background: var(--paper); }
.output h3 { padding-bottom: 12px; border-bottom: 1px solid var(--line); }
.count { margin-top: 20px; }
.generated { padding-top: 14px; margin-top: 14px; }
.section { padding: 72px 0; }
.section-intro { display: block; }
.section-number { font-variant-numeric: tabular-nums; font-size: .875rem; letter-spacing: .08em; margin: 0 0 14px; }
.steps { gap: 20px; margin: 32px 0 24px; }
.steps li { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.steps h3 { margin-top: 16px; }
.steps p { font-size: 1rem; }
.mechanism-summary { max-width: none; padding: 20px 24px; border-radius: 12px; background: rgb(0 0 0 / 3%); }
.roster { margin-top: 16px!important; }
.availability-status { margin-top: 20px; }
.direction-grid, .trust-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; margin-top: 24px; }
.direction-card, .trust-row { padding: 24px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.direction-card h3 { font-size: 1.125rem; }
.direction-card p { margin-top: 12px; }
.additional-direction { margin: 0; }
.direction-card .scope { padding: 12px; border-radius: 8px; background: var(--soft); margin-top: 20px; }
.availability-note { margin-top: 24px; }
.trust-row, .trust-row:first-child { display: block; padding: 24px; }
.trust-row p { margin-top: 14px!important; }
.trust-actions { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; margin-top: 24px; }
.trust-actions .cta-group { margin-top: 0; }
.trust-actions .text-link { margin-top: 0; }
.faq { margin-top: 28px; }
.faq details, .faq details:first-child { margin-bottom: 10px; padding: 0 20px; border: 1px solid var(--line); border-radius: 10px; background: var(--paper); }
.faq summary { padding-block: 18px; }
.faq summary:after { right: 0; top: 17px; }
.faq-answer { max-width: 900px; }
.action { max-width: 960px; margin: 24px 0 72px; padding: 40px; border: 1px solid var(--line); border-radius: 16px; background: var(--paper); box-shadow: var(--shadow-card); }
.site-footer { border-top-color: var(--line); }
.data-page { max-width: 800px; }
.data-page section { padding: 24px; border-radius: 12px; border: 1px solid var(--line); background: var(--paper); }
.data-page .provider-policy { border-top-color: var(--line); }
@supports ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .site-header { background: rgba(247, 246, 243, .82); -webkit-backdrop-filter: blur(20px) saturate(180%); backdrop-filter: blur(20px) saturate(180%); }
}
@media (prefers-reduced-transparency: reduce) {
  .site-header { background: var(--canvas); -webkit-backdrop-filter: none; backdrop-filter: none; }
}
@media (min-width: 1200px) and (max-width: 1359px) {
  .hero { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 32px; }
  h1 { font-size: 2.5rem; }
}
@media (max-width: 1199px) {
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-top: 40px; }
  .hero-copy { max-width: 730px; }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .direction-grid, .trust-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 719px) {
  html { scroll-padding-top: 80px; }
  .site-header, .header-inner { min-height: 64px; }
  .header-inner { gap: 16px; }
  .hero { padding: 28px 0 48px; gap: 28px; }
  .status { padding: 10px 12px; margin-bottom: 20px; }
  h1 { font-size: 2.25rem; line-height: 1.3; }
  h2 { font-size: 1.75rem; }
  .lead { font-size: 1.0625rem; margin-top: 16px; }
  .example { padding: 16px; border-radius: 16px; }
  .example-heading { padding: 10px 12px; }
  .input-excerpt { padding: 12px 12px 2px; }
  .output { padding: 14px; }
  .section { padding-block: 48px; }
  .steps { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; }
  .steps li { padding: 20px 20px 20px 64px; }
  .step-number { left: 20px; top: 20px; }
  .steps h3 { margin-top: 0; }
  .mechanism-summary { padding: 20px; }
  .direction-card, .trust-row, .trust-row:first-child { padding: 20px; }
  .direction-grid, .trust-grid { gap: 12px; }
  .trust-actions { display: block; }
  .trust-actions .cta-group { margin-top: 20px; }
  .faq details { padding-inline: 16px; }
  .action { padding: 24px 20px; margin: 0 0 48px; }
  .data-page section { padding: 20px; }
}
@media (max-width: 359px) {
  h1 { font-size: 2.125rem; }
  .example { padding: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none!important; animation: none!important; scroll-behavior: auto!important; }
}