:root {
  --ink: #070707; --muted: #666a70; --paper: #ffffff; --white: #fff;
  --soft: #f5f6f7; --line: rgba(7,7,7,.1); --max: 1160px; color-scheme: light;
  font-family: "Inter Tight", Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}
* { box-sizing: border-box; }
html { background: var(--paper); color: var(--ink); scroll-behavior: smooth; }
body { margin: 0; font-size: 16px; line-height: 1.75; }
a { color: inherit; text-underline-offset: 5px; }
a:hover { color: var(--accent); }
img { display: block; max-width: 100%; height: auto; }
button, summary { font: inherit; }
h1,h2,h3,h4,p,figure { margin: 0; }
h1,h2 { font-family: "DM Serif Display", Georgia, "Songti SC", "STSong", ui-serif, serif; font-weight: 600; }
h1 { font-size: clamp(42px,3.6vw,52px); line-height: 1.32; letter-spacing: -.035em; }
h2 { font-size: clamp(28px,3.2vw,44px); line-height: 1.45; letter-spacing: -.025em; }
h3 { font-size: 21px; line-height: 1.5; }
h4 { font-size: 21px; }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }
.wrap { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; z-index: 30; top: 12px; left: 12px; padding: 8px 16px; background: var(--ink); color: white; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.draft-bar { padding: 4px 16px; background: var(--soft); color: var(--muted); text-align: center; font-size: 11px; letter-spacing: .02em; }
.site-header { display: grid; grid-template-columns: 48px 1fr 48px; min-height: 88px; align-items: center; gap: 24px; }
.site-header::after { content: ""; width: 48px; height: 48px; }
.brand { display: inline-flex; align-items: center; text-decoration: none; }
.brand img { width: 48px; height: 48px; border-radius: 12px; box-shadow: 0 0 0 1px rgba(7,7,7,.06),0 16px 64px rgba(18,22,30,.08); }
.site-header nav,.site-footer nav { display: flex; align-items: center; justify-content: center; gap: 32px; }
.site-header nav a,.site-footer nav a { font-size: 14px; color: var(--muted); text-decoration: none; white-space: nowrap; }
.site-header nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--highlight); text-decoration-thickness: 3px; text-underline-offset: 8px; }
.hero { display: grid; grid-template-columns: 480px minmax(0,1fr); gap: 70px; align-items: center; padding-block: 70px 100px; }
.hero-copy { grid-column: 2; grid-row: 1; min-width: 0; }
.hero-kicker { margin-bottom: 20px; color: var(--accent); font-size: 13px; font-weight: 700; }
.hero-copy .lede { max-width: 560px; margin-top: 25px; font-size: 18px; line-height: 1.8; color: var(--muted); }
.hero-actions { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; margin-top: 30px; }
.button { display: inline-flex; min-height: 50px; align-items: center; justify-content: center; gap: 16px; padding: 10px 22px; border: 1px solid var(--ink); border-radius: 100px; font-size: 15px; font-weight: 600; line-height: 1.6; text-decoration: none; }
.button-primary { background: var(--ink); color: #fff; }
.button-primary:hover { background: var(--accent); color: #fff; }
.text-link { display: inline-flex; gap: 12px; align-items: center; font-size: 15px; font-weight: 600; }
.hero-prerequisites { max-width: 530px; margin-top: 23px; font-size: 13px; line-height: 1.85; color: var(--muted); }
.hero-guide-link { display: inline-block; margin-top: 20px; color: var(--muted); font-size: 13px; font-weight: 600; text-decoration: none; }
.hero-guide-link:hover { text-decoration: underline; }
.product-preview { grid-column: 1; grid-row: 1; width: 420px; max-width: 100%; margin-inline: auto; border: 1px solid var(--line); border-radius: 24px; background: var(--white); box-shadow: 0 26px 70px rgba(18,22,30,.1); overflow: hidden; }
.preview-topline { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 25px; border-bottom: 1px solid var(--line); font-size: 13px; color: var(--muted); }
.preview-topline span:first-child { color: var(--ink); font-weight: 600; }
.ledger-example { padding: 24px; }
.ledger-total { display: flex; align-items: flex-start; flex-direction: column; margin: 0 0 23px; }
.ledger-total > span:first-child { color: var(--muted); font-size: 12px; font-weight: 700; }
.ledger-total > strong { font-size: 47px; line-height: 1.2; font-weight: 780; letter-spacing: -.045em; font-variant-numeric: tabular-nums; }
.month-label { margin-top: 10px; padding: 2px 10px; border-radius: 100px; background: var(--ink); color: #fff; font-size: 11px; font-weight: 700; }
.ledger-day { display: flex; align-items: center; justify-content: space-between; margin: 16px 1px 7px; font-size: 12px; color: var(--muted); }
.ledger-row { display: flex; align-items: center; gap: 12px; padding: 15px 13px; border-radius: 13px; background: var(--soft); }
.row-emoji { font-size: 26px; }
.ledger-row > div { display: flex; flex: 1; min-width: 0; flex-direction: column; line-height: 1.6; }
.ledger-row > div > strong { font-size: 15px; }
.ledger-row > div > span { font-size: 10px; color: var(--muted); }
.ledger-row > b { font-size: 13px; font-variant-numeric: tabular-nums; white-space: nowrap; }
.preview-caption { padding: 12px 20px; border-top: 1px solid var(--line); text-align: center; font-size: 11px; color: var(--muted); }
.demo-section,.audience-section,.start-section,.faq-section { padding-block: 82px; border-top: 1px solid var(--line); scroll-margin-top: 24px; }
.section-heading { display: flex; align-items: flex-end; justify-content: space-between; gap: 56px; }
.section-heading > p { max-width: 360px; font-size: 16px; color: var(--muted); }
.demo-steps { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 24px; padding: 0; margin: 44px 0 0; list-style: none; }
.demo-step-heading { display: flex; gap: 10px; align-items: baseline; margin-bottom: 18px; }
.demo-step-heading > span { color: var(--accent); font-size: 13px; font-weight: 700; font-variant-numeric: tabular-nums; }
.demo-step-heading h3 { font-size: 18px; }
.demo-panel { display: flex; min-height: 265px; align-items: stretch; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
.demo-panel > div { width: 100%; }
.demo-steps > li > p { margin-top: 17px; color: var(--muted); font-size: 14px; line-height: 1.85; }
.demo-caption { margin-top: 27px; font-size: 12px; color: var(--muted); }
.payment-example { padding: 25px 19px 18px; text-align: center; }
.payment-check { display: inline-grid; width: 28px; height: 28px; place-items: center; background: rgba(0,122,255,.08); color: var(--accent); border-radius: 100px; font-size: 16px; font-weight: 700; }
.payment-example > p { margin: 8px 0 2px; font-size: 13px; }
.payment-example > strong { display: block; font-size: 36px; line-height: 1.4; letter-spacing: -.035em; }
.payment-example dl { margin: 19px 0 14px; padding-top: 15px; border-top: 1px dashed var(--line); font-size: 11px; }
.payment-example dl > div { display: flex; justify-content: space-between; gap: 12px; }
.payment-example dt { color: var(--muted); }
.payment-example dd { margin: 0; }
small { font-size: 11px; color: var(--muted); }
.capture-example { display: flex; flex-direction: column; justify-content: center; padding: 24px 20px; background: var(--soft); border-radius: 17px; }
.action-button-example { display: flex; align-items: center; gap: 15px; }
.action-button-example > span { width: 20px; height: 54px; border: 3px solid #cbd0d4; border-radius: 20px; background: #666a70; }
.action-button-example p { font-size: 12px; line-height: 1.5; }
.action-button-example strong { font-size: 16px; }
.capture-example ol { padding-left: 19px; margin: 23px 0 15px; font-size: 12px; line-height: 2.1; }
.record-example { padding: 26px 19px 18px; }
.record-example > span { font-size: 12px; color: var(--muted); }
.record-example h4 { margin-top: 20px; }
.record-example > strong { font-size: 24px; line-height: 1.6; }
.record-example > p { margin-top: 7px; font-size: 11px; color: var(--muted); }
.record-example > small { display: block; margin-top: 15px; }
.evidence-example { margin-top: 20px; font-size: 12px; }
.evidence-example summary { padding: 7px 0; border-top: 1px solid var(--line); color: var(--accent); cursor: pointer; }
.evidence-example .payment-example { margin-top: 10px; padding: 15px 12px; background: var(--paper); border-radius: 12px; }
.ledger-compact { padding: 24px 18px; }
.ledger-compact .ledger-total > strong { font-size: 39px; }
.ledger-compact .ledger-row { padding: 12px 9px; gap: 8px; flex-wrap: wrap; }
.ledger-compact .ledger-row > b { width: 100%; padding-left: 33px; }
.ledger-compact .row-emoji { font-size: 24px; }
.audience-list,.expectations-list { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 50px; margin-top: 42px; }
.audience-list article { padding-top: 23px; border-top: 1px solid var(--line); }
.audience-list p,.expectations-list p { margin-top: 14px; color: var(--muted); }
.audience-closing { margin-top: 36px; font-size: 18px; font-weight: 550; }
.expectations-band { padding-block: 72px; background: var(--accent-soft); }
.expectations-list h3 { font-size: 20px; }
.setup-list { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); counter-reset: setup; gap: 32px; margin: 42px 0 36px; padding: 0; list-style: none; }
.setup-list li { counter-increment: setup; border-top: 1px solid var(--line); padding-top: 20px; }
.setup-list li::before { content: "0" counter(setup); font-size: 12px; color: var(--accent); font-weight: 700; }
.setup-list h3 { margin-top: 13px; font-size: 18px; }
.setup-list p { margin-top: 8px; font-size: 14px; color: var(--muted); }
.start-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 25px; }
.store-badge { display: inline-flex; align-items: center; min-height: 54px; }
.store-badge img { display: block; height: 54px; width: auto; }
.beta-note { margin-top: 18px; font-size: 13px; color: var(--muted); }
.shortcut-links,.guide-actions { display: flex; gap: 25px; flex-wrap: wrap; margin-top: 20px; font-size: 14px; }
.faq-list { max-width: 940px; margin-top: 30px; }
.faq-list details { padding: 19px 0; border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { font-size: 17px; font-weight: 600; cursor: pointer; }
.faq-list details p { margin: 15px 0 4px; max-width: 800px; color: var(--muted); }
.closing-section { margin-block: 0 85px; padding: 57px 0; border-top: 1px solid var(--line); text-align: center; }
.closing-section p { margin: 18px auto 0; max-width: 650px; color: var(--muted); }
.closing-section .button { border-color: var(--ink); color: var(--ink); margin-top: 27px; }
.closing-section .button:hover { background: var(--ink); color: #fff; }
.site-footer { display: grid; grid-template-columns: 1.2fr 1fr; align-items: start; gap: 35px; padding-block: 45px 36px; border-top: 1px solid var(--line); }
.site-footer > div > p { margin-top: 16px; max-width: 520px; font-size: 13px; color: var(--muted); }
.site-footer nav { justify-content: flex-end; gap: 23px; }
.footer-owner { grid-column: 1/-1; margin: 0; font-size: 12px; color: var(--muted); }
.page-hero,.article-header { padding-block: 76px 55px; border-bottom: 1px solid var(--line); }
.page-hero h1,.article-header h1 { max-width: 1000px; font-size: clamp(36px,4.1vw,57px); line-height: 1.45; }
.eyebrow { margin-bottom: 20px; font-size: 11px; color: var(--accent); font-weight: 700; letter-spacing: .14em; }
.page-hero .lede,.article-header .lede { margin-top: 20px; max-width: 850px; font-size: 18px; color: var(--muted); }
.content-list,.release-list,.support-grid,.legal-sections { padding-block: 45px 80px; }
.content-row { display: grid; grid-template-columns: 205px 1fr 30px; align-items: start; gap: 30px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.content-row h2 { font-family: inherit; font-size: 27px; }
.content-row h2 a { text-decoration: none; }
.content-row p { margin-top: 12px; color: var(--muted); }
.content-meta { font-size: 13px; color: var(--muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 12px 0 0; list-style: none; font-size: 11px; }
.tag-list li { padding: 2px 7px; border: 1px solid var(--line); border-radius: 5px; }
.row-arrow { font-size: 27px; text-decoration: none; }
.article { max-width: 1020px; padding-bottom: 70px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 20px; align-items: center; margin-top: 25px; color: var(--muted); font-size: 13px; }
.article-meta .tag-list { margin: 0; }
.guide-intro { margin-top: 30px; padding: 24px 28px; background: var(--accent-soft); border-radius: 14px; font-size: 15px; }
.prose { max-width: 850px; margin: 46px auto; overflow-wrap: anywhere; }
.prose p,.prose ul,.prose ol,.prose blockquote,.prose figure,.prose aside { margin-block: 22px; }
.prose h2 { margin: 48px 0 22px; font-family: inherit; font-size: 29px; }
.prose h3 { margin-top: 32px; }
.prose li { margin-block: 7px; }
.prose blockquote { padding-left: 23px; border-left: 3px solid var(--highlight); font-size: 21px; }
.prose .callout { padding: 18px 23px; background: var(--soft); border-radius: 11px; }
.blog-media img { width: 100%; border-radius: 15px; border: 1px solid var(--line); }
.blog-media figcaption { margin-top: 10px; font-size: 13px; color: var(--muted); }
.prose details { border-top: 1px solid var(--line); padding: 16px 0; }
.prose summary { font-weight: 600; cursor: pointer; }
.prose pre { max-width: 100%; padding: 20px; background: var(--soft); white-space: pre-wrap; }
.article-footer { display: flex; gap: 28px; flex-wrap: wrap; padding-top: 28px; border-top: 1px solid var(--line); font-size: 14px; }
.source-note { display: flex; gap: 20px; flex-wrap: wrap; justify-content: space-between; padding-top: 25px; font-size: 13px; color: var(--muted); }
.release { padding: 30px 0 45px; border-bottom: 1px solid var(--line); }
.release-heading { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
.release-version { margin-bottom: 10px; color: var(--accent); font-size: 18px; font-weight: 650; }
.release h2 { font-family: inherit; font-size: 24px; }
.release-heading time { color: var(--muted); font-size: 13px; }
.release-groups { max-width: 960px; margin-top: 25px; }
.release-groups h3 { font-size: 17px; }
.release-groups ul { padding-left: 22px; }
.release-groups li { margin-bottom: 9px; overflow-wrap: anywhere; }
.support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 25px 45px; }
.support-card { padding: 25px 0 30px; border-bottom: 1px solid var(--line); text-decoration: none; }
.support-card > span { float: right; font-size: 25px; }
.support-card h2 { font-family: inherit; font-size: 23px; }
.support-card p { color: var(--muted); margin-top: 10px; }
.contact-panel { display: flex; justify-content: space-between; align-items: center; gap: 50px; padding: 40px; margin-bottom: 70px; border-radius: 20px; background: var(--accent-soft); }
.contact-panel > div { max-width: 780px; }
.contact-panel p:not(.eyebrow) { margin-top: 14px; color: var(--muted); }
.contact-panel .button { flex-shrink: 0; }
.legal-page { max-width: 1020px; }
.legal-header { padding-inline: 0; }
.draft-notice { margin-top: 30px; padding: 25px 30px; border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: 14px; background: var(--soft); }
.draft-notice p { margin-top: 8px; }
.legal-sections { display: grid; gap: 42px; }
.legal-sections h2 { font-family: inherit; font-size: 26px; }
.legal-sections p { margin-top: 17px; color: var(--muted); }
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; }
td,th { padding: 10px; border: 1px solid var(--line); text-align: left; }
@media (max-width: 1080px) {
  .hero { gap: 36px; grid-template-columns: minmax(0,1fr) minmax(0,1.05fr); }
  h1 { font-size: 44px; }
  .demo-steps { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 36px; }
  .ledger-row { gap: 8px; }
  .ledger-row > b { font-size: 11px; }
  .audience-list,.expectations-list { gap: 28px; }
  .setup-list { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .site-footer nav { gap: 18px; flex-wrap: wrap; }
}
@media (max-width: 760px) {
  .wrap { width: min(calc(100% - 36px), var(--max)); }
  .site-header { padding-block: 19px; min-height: auto; grid-template-columns: 48px 1fr; gap: 15px; }
  .site-header::after { display: none; }
  .site-header nav { justify-content: flex-end; flex-wrap: wrap; width: 100%; gap: 8px 14px; }
  .site-header nav a { font-size: 13px; }
  .hero { grid-template-columns: minmax(0,1fr); padding-block: 38px 45px; gap: 36px; }
  .hero-copy { grid-column: 1; grid-row: 1; }
  h1 { font-size: clamp(34px,8.2vw,45px); }
  .hero-copy .lede { margin-top: 20px; font-size: 17px; }
  .hero-actions { gap: 23px; margin-top: 25px; }
  .hero-prerequisites { font-size: 12px; margin-top: 19px; }
  .product-preview { grid-column: 1; grid-row: 2; width: 100%; max-width: 470px; margin-inline: auto; }
  .preview-topline { padding-inline: 20px; }
  .ledger-example { padding: 23px 20px; }
  .ledger-row > b { font-size: 12px; }
  .demo-section,.audience-section,.start-section,.faq-section { padding-block: 46px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 18px; max-width: none; font-size: 15px; }
  .demo-steps { margin-top: 30px; gap: 30px 18px; }
  .demo-step-heading { display: block; margin-bottom: 12px; }
  .demo-step-heading h3 { font-size: 16px; margin-top: 4px; }
  .demo-panel { min-height: 260px; }
  .demo-steps > li > p { font-size: 13px; }
  .demo-panel .payment-example { padding-inline: 12px; }
  .payment-example dl > div { flex-direction: column; gap: 0; margin-bottom: 7px; }
  .capture-example,.record-example { padding-inline: 12px; }
  .action-button-example { gap: 10px; }
  .action-button-example strong { font-size: 13px; }
  .capture-example ol { font-size: 11px; padding-left: 16px; }
  .record-example > strong { font-size: 20px; }
  .evidence-example summary { font-size: 11px; }
  .ledger-compact { padding-inline: 12px; }
  .ledger-compact .ledger-row > div > span { display: none; }
  .ledger-compact .ledger-total > strong { font-size: 36px; }
  .audience-list,.expectations-list { grid-template-columns: 1fr; gap: 27px; margin-top: 27px; }
  .audience-list article { padding-top: 21px; }
  .audience-list p,.expectations-list p { margin-top: 9px; font-size: 15px; }
  .audience-closing { font-size: 16px; margin-top: 30px; }
  .expectations-band { padding-block: 43px; }
  .setup-list { gap: 22px; margin: 30px 0; }
  .setup-list p { font-size: 13px; }
  .start-actions { gap: 22px; }
  .store-badge,.store-badge img { height: 48px; min-height: 48px; }
  .beta-note { font-size: 12px; }
  .shortcut-links { gap: 16px; font-size: 13px; }
  .faq-list summary { font-size: 16px; }
  .faq-list details p { font-size: 15px; }
  .closing-section { padding: 33px 0; margin-bottom: 46px; }
  .closing-section p { font-size: 15px; }
  .site-footer { grid-template-columns: 1fr; gap: 25px; padding-block: 32px; }
  .site-footer nav { justify-content: flex-start; gap: 23px; flex-wrap: wrap; }
  .page-hero,.article-header { padding-block: 43px 35px; }
  .page-hero h1,.article-header h1 { font-size: 34px; }
  .page-hero .lede,.article-header .lede { font-size: 16px; }
  .content-row { grid-template-columns: 1fr; gap: 17px; }
  .content-row h2 { font-size: 24px; }
  .content-meta .tag-list { margin-top: 8px; }
  .row-arrow { display: none; }
  .article-meta { gap: 13px; }
  .guide-intro { padding: 20px; font-size: 14px; }
  .guide-actions { gap: 15px; font-size: 13px; }
  .prose { font-size: 16px; margin-block: 30px; }
  .prose h2 { font-size: 25px; }
  .prose blockquote { font-size: 19px; }
  .article-footer { gap: 20px; }
  .release h2 { font-size: 21px; }
  .release-groups li { font-size: 15px; }
  .support-grid { grid-template-columns: 1fr; gap: 0; padding-block: 20px 35px; }
  .contact-panel { display: block; padding: 27px; margin-bottom: 45px; }
  .contact-panel .button { margin-top: 25px; }
  .draft-notice { padding: 22px; font-size: 15px; }
  .legal-sections { padding-block: 34px 50px; }
  .legal-sections p { font-size: 15px; }
}
@media (max-width: 360px) {
  .demo-steps { grid-template-columns: 1fr; }
  .demo-step-heading { display: flex; }
  .demo-panel { min-height: 240px; }
  .setup-list { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }