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p{font-size:14px;max-width:750px;color:var(--muted)}.standalone{max-width:740px;margin:0 auto 90px;padding:0 24px}.standalone h2{font-size:26px;margin:34px 0 14px}.standalone p{line-height:2.1;color:var(--muted)}.standalone a{color:var(--rose);text-decoration:underline}.mobile-only{display:none}
@media(min-width:761px){.menu-button{display:none!important}}
@media(max-width:1100px){.hero{gap:40px}.hero h1{font-size:52px}.article-layout{gap:40px;grid-template-columns:minmax(0,2.4fr) 1fr}.contact-grid{grid-template-columns:1fr}.wechat-panel img{width:190px;height:190px}.about-page{gap:45px}.card-body{padding:22px}.hero-visual{padding-left:14px}.portrait-caption{gap:10px;align-items:start;flex-direction:column}.portrait-caption p{margin-top:-7px}}
@media(max-width:760px){.wrap,.header-inner{width:calc(100% - 40px)}.preview-note{font-size:10px;padding-block:4px}.header-inner{height:auto;min-height:74px;flex-wrap:wrap;gap:0;padding-block:13px}.brand-mark{width:34px;height:39px;line-height:38px;font-size:22px}.brand-type{font-size:22px}.brand-type small{font-size:8px;margin-top:5px}.brand{gap:9px}#main-nav{width:100%;padding-top:16px;gap:4px;display:flex;flex-wrap:wrap;font-size:13px}#main-nav a{padding:10px 8px;flex:1;text-align:center}body.has-js #main-nav:not(.is-open){display:none}.hero{grid-template-columns:1fr;gap:40px;padding-top:34px;padding-bottom:40px}.hero h1{font-size:47px;line-height:1.32;margin:16px 0 20px}.hero-description{font-size:14px;line-height:1.95}.hero-description br:first-child{display:none}.hero-actions{gap:22px;margin-top:24px}.button{padding:13px 20px;gap:24px;font-size:13px}.hero-actions .text-link{font-size:13px}.hero-note{margin-top:18px;font-size:10px}.hero-visual{width:88%;justify-self:center;max-width:430px;padding-top:15px}.portrait-frame{aspect-ratio:1.04}.portrait-caption{flex-direction:row;align-items:center;margin-top:14px;padding-bottom:10px}.portrait-caption>span{font-size:20px}.portrait-caption small{font-size:10px;margin-left:7px}.portrait-caption p{font-size:10px;margin:0}.vertical-note{right:-23px;top:55px;font-size:9px}.intro-strip{padding-block:20px}.intro-strip .wrap{align-items:start;gap:18px}.intro-strip p{font-size:17px}.intro-strip span{font-size:10px;white-space:nowrap;padding-top:4px}.mobile-only{display:block}.section{padding-block:48px}.section-heading{gap:20px;align-items:start;margin-bottom:25px}.section-heading h2{font-size:28px}.section-heading>p{display:none}.section-heading .text-link{font-size:12px;white-space:nowrap;align-self:end}.topic-grid{grid-template-columns:1fr}.topic{padding:22px 15px 22px 48px}.topic:not(:last-child){border-right:0;border-bottom:1px solid var(--line)}.topic-number{position:absolute;left:8px;top:26px}.topic h3{font-size:23px;margin:0 0 6px}.topic p{font-size:13px}.topic p br{display:none}.topic .arrow{right:10px;bottom:38px}.article-grid{grid-template-columns:1fr;gap:24px}.card-art{height:155px}.card-body{padding:24px}.card-body h3{font-size:22px;margin-top:8px}.card-body>p{font-size:14px}.card-meta{padding-top:20px}.about-teaser{grid-template-columns:1fr;gap:18px}.about-teaser h2{font-size:29px}.about-teaser>div>p{font-size:14px}.contact-band{padding:28px 24px;flex-direction:column;align-items:start;gap:22px;margin-bottom:45px}.contact-band h2{font-size:25px}.contact-band p:not(.eyebrow){font-size:13px}.footer-main{grid-template-columns:1fr 1fr;gap:34px;padding-block:36px}.footer-main>div:first-child{grid-column:1/-1}.footer-main>div:first-child p br{display:none}.footer-bottom>div{flex-direction:column;gap:5px;font-size:10px}.page-heading{padding-top:38px;padding-bottom:32px}.page-heading h1{font-size:35px}.page-heading>p:last-child{font-size:14px}.search-row input{width:100%;padding-inline:12px;font-size:14px}.search-row .button{min-width:70px;padding-inline:16px}.filter-bar{gap:7px;margin-top:22px}.filter-bar a{font-size:12px;padding:7px 12px;min-height:40px}.library-section{padding-bottom:45px}.breadcrumbs{font-size:11px;gap:8px;padding-block:22px}.article-layout{display:block}.reading h1{font-size:30px;margin-top:12px}.byline{font-size:11px;gap:8px 16px}.article-summary{font-size:15px;margin-block:22px}.answer-box{padding:20px;margin:25px 0 30px}.answer-box p{font-size:16px;line-height:1.95}.reading section h2{font-size:23px}.reading section p{font-size:16px;line-height:2}.article-sidebar{display:none}.related{padding:36px 0 45px}.related .article-grid{grid-template-columns:1fr}.article-end{font-size:12px}.about-page{grid-template-columns:1fr;padding-top:35px;padding-bottom:45px;gap:30px}.about-page h1{font-size:35px}.about-page .lead{font-size:21px}.about-page p:not(.eyebrow){font-size:15px}.about-page blockquote{font-size:22px}.about-page figure{width:85%;justify-self:center;grid-row:2}.contact-grid{gap:20px}.contact-panel{padding:26px}.contact-panel h2{font-size:27px}.wechat-panel{flex-direction:column;align-items:start;gap:20px}.wechat-panel img{width:200px;height:200px;align-self:center}.wechat-panel>div{width:100%;text-align:center}.contact-note{padding-top:30px;padding-bottom:45px}.empty-state{padding:35px 20px}.empty-state h2{font-size:23px}.standalone{padding-inline:20px;margin-bottom:45px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}
/* Crawlable topic pages, visible provenance and narrow-screen reading. */
#main-nav a[aria-current=location]{color:var(--rose)}
.category-heading{padding-top:18px}.category-return{margin-top:30px}
#search-help{margin-top:8px}#clear-search{margin-top:8px}
.citation{font-size:12px;white-space:nowrap;line-height:1}
.citation a{color:var(--rose);padding:5px 3px;text-decoration:underline;text-underline-offset:3px}
.reading .section-citations{font-size:12px;color:var(--muted);margin-top:-7px}
.source-section h3{font-size:19px;margin-top:22px}.revision-list{padding-left:20px}
.mobile-toc{display:none}
@media(max-width:760px){
 .mobile-toc{display:block;border-block:1px solid var(--line);padding:14px 0;margin-bottom:25px}
 .mobile-toc summary{cursor:pointer;font-size:14px;color:var(--rose);padding:5px 0}
 .mobile-toc nav{display:flex;flex-direction:column;gap:4px;padding-top:10px;font-size:13px}
 .mobile-toc nav a{padding:6px 2px}
 .breadcrumbs [aria-current=page]{flex-basis:100%}
}
@media(max-width:360px){
 .hero-actions{flex-wrap:wrap;gap:12px 20px}.hero h1{font-size:42px}
 .portrait-caption{flex-wrap:wrap;gap:7px}.portrait-caption small{display:block;margin:4px 0 0}
 .section-heading{flex-wrap:wrap}.section-heading h2{font-size:26px}
 .contact-panel{padding:22px}.contact-panel h2{font-size:25px}
 .intro-strip .wrap{flex-wrap:wrap;gap:6px}
 .reading h1{font-size:28px}.article-end{flex-wrap:wrap}
}