@charset "UTF-8";
:root{--paper:#f4f0e8;--ink:#243d35;--muted:#5b655e;--line:#cfcfc1;--accent:#be4e32;--peach:#ebbea0;--cream:#fffaf0;--serif:"Songti SC","STSong","Noto Serif CJK SC",serif;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:32px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration-thickness:1px;text-underline-offset:5px}button,input{font:inherit}a,button,input,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}img,svg{max-width:100%}h1,h2,h3,p{margin:0}h1,h2,h3{text-wrap:balance;line-height:1.28}p+p{margin-top:1em}h1,h2{font-weight:600;letter-spacing:-.045em}h3{letter-spacing:-.02em;font-size:24px}p{overflow-wrap:anywhere}strong{font-weight:650}.wrap{width:min(1240px,calc(100% - 96px));margin:0 auto}.skip{position:absolute;left:20px;top:-100px;background:var(--ink);color:white;padding:12px;z-index:20}.skip:focus{top:12px}.identity-line{font-size:12px;letter-spacing:.06em;border-bottom:1px solid var(--line)}.identity-line .wrap{display:flex;justify-content:space-between;gap:20px;padding:8px 0}.identity-line a{text-decoration:none}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:32px;padding:26px 0;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;flex-shrink:0}.brand-symbol{display:grid;place-items:center;width:45px;height:45px;background:var(--ink);color:var(--paper);font-size:31px;border-radius:50%}.brand strong{display:block;font-size:21px;letter-spacing:.1em;line-height:1.3}.brand small{display:block;font-size:10px;letter-spacing:.28em;line-height:1.5;margin-top:3px}.header nav{display:flex;gap:30px;font-size:14px}.header nav a{text-decoration:none;position:relative;padding:10px 0}.header nav a::after{content:"";position:absolute;bottom:3px;left:0;width:100%;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .2s}.header nav a:hover::after,.header nav a[aria-current]::after{transform:scaleX(1)}.hero{display:grid;grid-template-columns:1.05fr .95fr;gap:7%;align-items:center;padding:78px 0 76px}.kicker{font-size:12px;letter-spacing:.14em;font-weight:600;line-height:1.6;text-transform:uppercase}.dot{display:inline-block;width:7px;height:7px;border-radius:100%;background:var(--accent);margin-right:7px}.hero h1{font-size:clamp(54px,6.8vw,86px);line-height:1.16;margin:27px 0}.hero h1 em{font-family:var(--serif);font-style:normal;font-weight:500;color:var(--accent)}.lead{font-size:18px;line-height:1.9;max-width:590px;color:#4e5b53}.hero-actions{display:flex;align-items:center;gap:27px;margin:30px 0 22px}.button{display:inline-flex;justify-content:center;gap:32px;align-items:center;background:var(--ink);color:var(--cream);padding:13px 23px;text-decoration:none;font-size:15px;border:1px solid var(--ink);transition:background .2s,transform .2s}.button:hover{background:#35594b;transform:translateY(-2px)}.text-link{font-size:14px;text-decoration:none}.subnote,.small{font-size:12px;color:var(--muted)}.hero-art{position:relative;background:var(--accent);color:var(--cream);min-height:560px;padding:24px 35px 28px;overflow:hidden;border-radius:160px 160px 3px 3px}.art-caption{display:flex;justify-content:space-between;font-size:10px;letter-spacing:.1em;margin:65px 0 20px}.receipt{position:relative;background:var(--cream);color:var(--ink);padding:28px;transform:rotate(-5deg);box-shadow:10px 18px 0 #75331c30;margin:0 10px}.receipt::after{content:"";position:absolute;height:10px;left:0;right:0;bottom:-10px;background:linear-gradient(135deg,var(--cream) 25%,transparent 25%) -8px 0/16px 16px,linear-gradient(225deg,var(--cream) 25%,transparent 25%) -8px 0/16px 16px}.receipt-head{display:flex;gap:17px;align-items:center;font-size:24px;font-weight:650;padding-bottom:22px;border-bottom:1px dashed #94998c}.receipt-head small{display:block;font-size:11px;letter-spacing:.04em;font-weight:400;margin-top:3px}.receipt-icon{font-size:44px;line-height:1}.receipt dl{margin:18px 0}.receipt dl>div{display:flex;justify-content:space-between;padding:8px 0;font-size:13px;gap:10px}.receipt dd{margin:0;font-weight:550}.receipt-end{padding-top:16px;border-top:1px dashed #94998c}.receipt-end strong{display:block;font-size:19px}.receipt-end span{font-size:10px;color:var(--muted)}.art-note{display:flex;align-items:center;gap:20px;margin:37px 16px 0}.art-note>span{font-size:56px;line-height:1}.art-note p{font-size:12px;line-height:1.7}.intro-line{border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;gap:35px;align-items:center;padding:23px 0}.intro-line>span:first-child{font-size:12px;min-width:95px;letter-spacing:.08em}.intro-line p{font-size:15px;color:var(--muted)}.intro-line strong{color:var(--ink)}.intro-line .arrow{margin-left:auto;font-size:36px;line-height:1}.section{padding:85px 0;border-bottom:1px solid var(--line)}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:50px;margin-bottom:40px}.section-heading h2,.two-col h2{font-size:clamp(31px,3.8vw,45px);margin-top:15px}.section-heading>p{max-width:390px;color:var(--muted);font-size:15px}.cards{display:grid;grid-template-columns:repeat(3,1fr)}.topic-card{display:flex;flex-direction:column;text-decoration:none;position:relative;border:1px solid var(--line);padding:29px 29px 24px;min-height:330px;transition:background .22s,transform .22s}.topic-card+.topic-card{border-left:0}.topic-card:hover{background:#fffaf0;transform:translateY(-4px)}.chapter{font-size:11px;letter-spacing:.06em}.topic-card h3{margin:31px 0 17px;font-size:25px;line-height:1.45}.topic-card p{font-size:14px;color:var(--muted);margin-bottom:32px}.card-bottom{display:flex;justify-content:space-between;align-items:center;margin-top:auto;font-size:12px}.card-bottom span{font-size:25px}.feature-band{background:var(--ink);color:var(--cream);display:grid;grid-template-columns:1fr 1fr;gap:9%;padding:55px;margin-top:80px}.feature-band h2{font-size:42px;margin:18px 0 23px}.feature-band p{font-size:15px;color:#d2dacf;line-height:1.9}.light-link{display:inline-block;margin-top:25px;font-size:14px}.relationship{align-self:center}.relationship>div{border:1px solid #719083;padding:22px}.relationship span,.relationship small{display:block;font-size:12px;color:#c6d1c9}.relationship strong{display:block;font-size:25px;margin:3px 0}.relationship .separator{font-size:28px;text-align:center;line-height:1.6}.relationship>p{font-size:12px;margin-top:19px}.two-col{display:grid;grid-template-columns:.8fr 1.2fr;gap:11%}.two-col>.muted,.two-col>div>.muted{max-width:330px;font-size:15px;margin-top:25px}.muted{color:var(--muted)}.glossary{margin:0}.glossary>div{border-top:1px solid var(--line);padding:24px 0;display:grid;grid-template-columns:120px 1fr;gap:22px}.glossary>div:first-child{padding-top:0;border:0}.glossary dt{font-weight:650;font-size:16px}.glossary dd{font-size:15px;margin:0;color:var(--muted)}.faq details{border-top:1px solid var(--line)}.faq details:first-child{border:0}.faq summary{cursor:pointer;list-style:none;padding:22px 35px 22px 0;font-size:16px;font-weight:600;position:relative;line-height:1.6}.faq details:first-child summary{padding-top:0}.faq summary::-webkit-details-marker{display:none}.faq summary::after{content:"+";position:absolute;right:3px;font-size:23px;line-height:1;top:24px}.faq details:first-child summary::after{top:2px}.faq details[open] summary::after{content:"−"}.faq p{font-size:15px;color:var(--muted);padding:0 12px 24px 0}.faq details>a{display:block;font-size:13px;padding-bottom:22px}.resource-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 30px}.resource-grid a{display:flex;align-items:center;justify-content:space-between;gap:25px;padding:20px 0;border-top:1px solid var(--line);font-size:14px;text-decoration:none}.resource-grid a:hover>span:first-child{text-decoration:underline;text-underline-offset:5px}.resource-grid a>span:last-child{font-size:22px}.footer{padding:45px 0;background:#e8e6db;margin-top:65px}.footer-top,.footer-bottom{display:flex;justify-content:space-between;gap:40px}.footer-top{padding-bottom:25px;border-bottom:1px solid #bec3b7;align-items:center}.footer-top .brand{font-size:22px;font-weight:650}.footer-en{font-size:11px;letter-spacing:.14em}.footer-top p{font-family:var(--serif);font-size:23px}.footer-bottom{padding-top:24px;font-size:12px;color:var(--muted)}.footer-bottom nav{display:flex;flex-wrap:wrap;gap:22px;align-items:flex-start}.footer-bottom nav a{text-decoration:none}.article-heading{max-width:1000px;padding:35px 0 54px}.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:48px;display:flex;gap:14px}.breadcrumb a{text-decoration:none}.article-heading h1{font-size:clamp(35px,4.5vw,58px);line-height:1.3;max-width:1000px;margin:20px 0}.article-heading .lead{max-width:760px;font-size:17px}.byline{font-size:12px;color:var(--muted);margin-top:23px}.article-layout{display:grid;grid-template-columns:260px minmax(0,760px);gap:6%;border-top:1px solid var(--line);padding-top:44px}.toc{position:sticky;top:28px;align-self:start;font-size:13px}.toc .kicker{margin-bottom:18px}.toc a{display:block;text-decoration:none;padding:8px 0;color:var(--muted)}.toc a:hover{color:var(--accent)}.toc .toc-about{border-top:1px solid var(--line);padding-top:19px;margin-top:21px;font-size:12px}.prose{min-width:0;max-width:760px}.prose>section{margin-bottom:57px;scroll-margin-top:30px}.prose h2{font-size:29px;line-height:1.45;margin:0 0 22px}.prose h3{font-size:19px;margin:24px 0 12px}.prose p{line-height:1.95;color:#46574d}.prose ul,.prose ol{padding-left:23px;color:#46574d}.prose li{padding:6px 0;line-height:1.9}.prose strong{color:var(--ink)}.table-scroll{overflow-x:auto;border:1px solid var(--line);margin:29px 0}table{border-collapse:collapse;width:100%;min-width:510px;font-size:14px;text-align:left}caption{text-align:left;background:#e8e6db;padding:15px;font-size:13px}th,td{padding:14px 15px;border-top:1px solid var(--line);vertical-align:top}thead th{font-size:12px;background:#e8e6db}tbody th{min-width:85px;font-weight:600}td{color:var(--muted)}.example-receipt{background:var(--cream);border:1px solid var(--line);padding:28px;margin:28px 0}.example-receipt dl{margin:19px 0}.example-receipt dl>div{display:flex;justify-content:space-between;gap:25px;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px}.example-receipt dd{margin:0;font-weight:600}.example-receipt>p:last-child{font-size:14px}.example-receipt>p strong{font-size:25px}.callout{border-left:3px solid var(--accent);background:#ece6da;padding:22px 25px;margin:26px 0}.callout>p{margin-top:8px;font-size:15px}.citation{font-size:13px!important}.two-panels{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:25px 0}.two-panels>div{padding:22px;border:1px solid var(--line)}.two-panels h3{margin-top:12px}.two-panels p:not(.kicker){font-size:14px}.steps{list-style:none;padding:0!important;counter-reset:steps}.steps>li{counter-increment:steps;position:relative;padding:0 0 24px 54px;border-bottom:1px solid var(--line);margin-bottom:24px}.steps>li::before{content:"0" counter(steps);position:absolute;left:0;top:0;font-size:17px;color:var(--accent);font-variant-numeric:tabular-nums}.steps h3{margin:0 0 10px}.sources{border-top:1px solid var(--line);padding-top:29px;margin-top:35px}.sources h2{font-size:23px}.sources p,.sources li{font-size:13px}.reading-next{display:flex;flex-wrap:wrap;gap:20px;align-items:center;border-top:1px solid var(--line);padding-top:25px;margin-top:45px;font-size:13px}.reading-next span{font-size:11px;letter-spacing:.1em;color:var(--muted)}.checklist{margin:29px 0;border:1px solid var(--line);background:var(--cream)}.checklist-top{display:flex;justify-content:space-between;gap:20px;background:var(--ink);color:var(--cream);padding:15px 22px;font-size:13px}.checklist-top strong{color:var(--cream)}.checklist>label{display:flex;gap:16px;cursor:pointer;border-bottom:1px solid var(--line);padding:20px 22px;align-items:flex-start}.checklist input{width:20px;height:20px;flex-shrink:0;accent-color:var(--ink);margin:4px 0 0}.checklist label strong{display:block;font-size:15px}.checklist label small{display:block;font-size:13px;color:var(--muted);margin-top:3px}.checklist>p{padding:15px 22px;font-size:12px}.warning-list{padding-left:22px}.invitation{padding:46px;background:#e8e6db;margin-top:65px}.invitation h2{font-size:32px;margin:16px 0 22px}.invitation p{max-width:750px}.invitation .button{margin:24px 0 14px}.error-page{width:min(700px,calc(100% - 48px));margin:100px auto}.error-page h1{font-size:68px;margin:25px 0}.error-page p{max-width:520px}.error-page .button{margin-top:30px}@media(min-width:1500px){.hero h1{font-size:89px}.hero-art{min-height:580px}}@media(max-width:1050px){.wrap{width:calc(100% - 56px)}.header nav{gap:20px}.hero{gap:5%;padding:58px 0}.hero-art{min-height:505px;padding-left:20px;padding-right:20px}.receipt{padding:23px;margin:0 5px}.art-caption{margin-top:64px}.hero h1{font-size:64px}.hero .lead{font-size:16px}.subnote{font-size:11px}.topic-card{padding:24px 22px}.topic-card h3{font-size:22px}.feature-band{padding:38px;gap:6%}.feature-band h2{font-size:36px}.two-col{gap:7%}.article-layout{grid-template-columns:215px minmax(0,1fr);gap:5%}.toc{font-size:12px}.glossary>div{grid-template-columns:105px 1fr;gap:17px}.section{padding:66px 0}}@media(max-width:760px){.wrap{width:calc(100% - 40px)}.identity-line{font-size:10px}.header-inner{align-items:flex-start;flex-direction:column;gap:20px;padding:20px 0 16px}.header nav{justify-content:space-between;width:100%;gap:12px;font-size:12px}.header nav a{padding:2px 0 7px}.brand-symbol{width:37px;height:37px;font-size:26px}.brand strong{font-size:19px}.brand small{font-size:9px}.hero{grid-template-columns:1fr;gap:36px;padding:39px 0}.hero h1{font-size:clamp(54px,12vw,80px);margin:22px 0}.hero-copy .lead{font-size:16px;max-width:550px}.hero-actions{gap:20px;margin:25px 0 17px;flex-wrap:wrap}.hero-art{max-width:500px;width:100%;min-height:470px;margin:0 auto;padding:20px 32px 25px;border-radius:140px 140px 3px 3px}.art-caption{margin-top:45px}.receipt{padding:25px;margin:0 18px}.art-note{margin-top:30px;margin-left:35px}.intro-line{gap:15px;padding:19px 0;align-items:flex-start}.intro-line>span:first-child{min-width:60px;font-size:10px;padding-top:3px}.intro-line p{font-size:13px}.intro-line .arrow{font-size:27px}.section{padding:48px 0}.section-heading{display:block;margin-bottom:27px}.section-heading>p{margin-top:22px;max-width:100%;font-size:14px}.section-heading h2,.two-col h2{font-size:33px}.cards{grid-template-columns:1fr}.topic-card{padding:25px;min-height:0;display:grid;grid-template-columns:1fr auto;gap:0 15px}.topic-card+.topic-card{border-left:1px solid var(--line);border-top:0}.topic-card h3{font-size:25px;margin:21px 0 14px;grid-column:1 / -1}.topic-card h3 br{display:none}.topic-card p{margin-bottom:21px;grid-column:1 / -1}.card-bottom{grid-column:1 / -1}.feature-band{grid-template-columns:1fr;padding:30px 25px;margin-top:45px;gap:32px}.feature-band h2{font-size:36px}.relationship strong{font-size:22px}.two-col{grid-template-columns:1fr;gap:35px}.two-col>div>.muted{max-width:100%;font-size:14px;margin-top:19px}.glossary>div{grid-template-columns:100px 1fr;gap:17px}.glossary dd{font-size:14px}.resource-grid{grid-template-columns:1fr}.resource-grid a{font-size:13px;padding:17px 0}.footer{margin-top:44px;padding:30px 0}.footer-top,.footer-bottom{display:block}.footer-top p{font-size:21px;margin-top:17px}.footer-bottom nav{margin-top:19px;gap:18px;font-size:11px}.article-heading{padding:25px 0 35px}.breadcrumb{margin-bottom:30px;font-size:11px}.article-heading h1{font-size:35px}.article-heading .lead{font-size:15px}.byline{font-size:11px}.article-layout{grid-template-columns:1fr;gap:31px;padding-top:25px}.toc{position:static;display:flex;gap:9px 17px;flex-wrap:wrap;border-bottom:1px solid var(--line);padding-bottom:20px}.toc .kicker{width:100%;margin:0}.toc a{padding:3px 0;font-size:12px}.toc .toc-about{display:none}.prose h2{font-size:25px}.prose p,.prose ul,.prose ol{font-size:15px}.prose>section{margin-bottom:40px}.two-panels{grid-template-columns:1fr;gap:15px}.checklist-top{padding:14px 16px;font-size:12px}.checklist>label{padding:17px 16px;gap:13px}.checklist label strong{font-size:14px}.checklist label small{font-size:12px}.example-receipt{padding:21px}.example-receipt dl>div{font-size:12px;gap:10px}.example-receipt>p strong{font-size:23px}.invitation{padding:28px;margin-top:44px}.invitation h2{font-size:28px}.invitation p{font-size:14px}.error-page{margin-top:65px}.error-page h1{font-size:52px}}@media(max-width:370px){.wrap{width:calc(100% - 32px)}.header nav{font-size:11px;gap:9px}.hero h1{font-size:51px}.button{padding:12px 18px;font-size:13px;gap:20px}.hero-art{padding-left:16px;padding-right:16px;min-height:450px}.receipt{margin-left:12px;margin-right:12px;padding:22px}.receipt-head{font-size:22px}.receipt dl>div{font-size:12px}.glossary>div{grid-template-columns:1fr;gap:8px}.article-heading h1{font-size:31px}.checklist-top{gap:9px}.checklist-top>span{white-space:nowrap}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}@media print{.identity-line,.header nav,.hero-art,.toc,.footer nav,.button,.reading-next{display:none}.wrap{width:100%}.article-layout{display:block}.hero{display:block}.section,.feature-band{padding:20px 0;background:white;color:black}.feature-band p{color:black}.footer{background:white}body{background:white;color:black}.prose{max-width:none}.faq details>p{display:block}.topic-card{break-inside:avoid}}

@media(max-width:768px){.header nav a{display:inline-flex;align-items:center;min-height:44px;padding-top:6px;padding-bottom:6px;}}