*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Noto Sans SC",system-ui,sans-serif;background:#fff;color:#1a1a1a;line-height:1.75;font-size:16px}
a{color:#9333ea;text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.site-header{background:#fff;border-bottom:2px solid #eee;position:sticky;top:0;z-index:100}
.header-row{display:flex;align-items:center;justify-content:space-between;padding:14px 0}
.brand{display:flex;align-items:center;gap:10px;color:#1a1a1a;font-weight:500}
.brand b{color:#9333ea}
.site-nav ul{display:flex;gap:16px;list-style:none;flex-wrap:wrap}
.site-nav a{color:#555;font-size:.92rem}.site-nav a.active{color:#9333ea;font-weight:600}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:22px;height:2px;background:#333}
.ads-top-bar{background:#fafafa;border-bottom:1px solid #eee;padding:10px 0}
.applist-title{font-size:.78rem;color:#888;text-align:center;margin-bottom:6px}
#ads{display:flex;justify-content:center;flex-wrap:wrap;gap:12px}
.hero{padding:40px 0 28px;border-bottom:1px solid #eee}
.hero .tag{display:inline-block;font-size:.72rem;color:#9333ea;border:1px solid #9333ea;padding:3px 10px;margin-bottom:12px}
.hero h1{font-size:1.65rem;line-height:1.35;margin-bottom:16px;max-width:820px}
.hero .lead{color:#333;margin-bottom:12px;max-width:820px;text-align:justify}
.section-nav{background:#fafafa;border-bottom:1px solid #ddd;position:sticky;top:58px;z-index:90;overflow-x:auto}
.section-nav ul{display:flex;gap:0;list-style:none;min-width:max-content}
.section-nav a{display:block;padding:11px 16px;font-size:.84rem;color:#555;border-right:1px solid #e5e5e5;white-space:nowrap}
.section-nav a.is-active,.section-nav a:hover{background:#9333ea;color:#fff;text-decoration:none}
.content-wrap{padding:32px 0}
.content-section{margin-bottom:36px;padding:24px;border:1px solid #e8e8e8;background:#fff}
.content-section .sec-num{display:inline-block;font-size:.75rem;color:#9333ea;border:1px solid #9333ea;padding:2px 8px;margin-bottom:10px}
.content-section h2{font-size:1.12rem;margin-bottom:14px;color:#111}
.sec-body p{margin-bottom:12px;text-align:justify;color:#333;font-size:.97rem}
.sec-fig{margin-top:16px;border:1px solid #eee}
.sec-fig figcaption{font-size:.8rem;color:#666;padding:8px 12px;background:#fafafa}
.faq{padding:32px 0 48px;border-top:2px solid #eee}
.faq h2{font-size:1.2rem;margin-bottom:16px}
.faq details{border:1px solid #ddd;margin-bottom:8px}
.faq summary{padding:12px 16px;cursor:pointer;font-weight:500;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq details p{padding:12px 16px;color:#444;font-size:.94rem}
.site-footer{background:#fafafa;border-top:1px solid #eee;padding:24px 0;text-align:center;font-size:.88rem;color:#666}
.footer-links{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:8px}
.prose-page{padding:32px 0 48px}.prose-page h1{font-size:1.45rem;margin-bottom:14px}
.prose-page p{margin-bottom:12px;color:#333}
.error-page{text-align:center;padding:48px 0}.error-page h1{font-size:3rem;color:#9333ea}
.layout-timeline .content-wrap{border-left:3px solid #9333ea;margin-left:12px;padding-left:24px}
.layout-checker .content-wrap{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.layout-checker .content-section:nth-child(odd){background:#fafafa}
.layout-rail .content-wrap{display:flex;flex-direction:column;gap:20px}
.layout-hex .content-section{clip-path:polygon(5% 0,95% 0,100% 50%,95% 100%,5% 100%,0 50%);padding:28px 32px}
.layout-diagonal .content-section{transform:skewY(-0.6deg);border-left:4px solid #9333ea}
.layout-masonry .content-wrap{columns:2;column-gap:20px}.layout-masonry .content-section{break-inside:avoid;margin-bottom:20px}
.layout-tabs .content-section{border-top:4px solid #9333ea}
.layout-bands .content-section:nth-child(even){background:#f8f8f8;margin-left:24px}
.layout-stack .content-section{box-shadow:4px 4px 0 #9333ea;margin-left:calc(var(--i,0)*4px)}
.layout-sidebar .content-wrap{display:grid;grid-template-columns:1fr;gap:16px}
.layout-steps .content-section{margin-left:calc(var(--n,0)*12px);max-width:calc(100% - var(--n,0)*12px)}
.layout-threecol .sec-body{column-count:2;column-gap:24px}
.layout-orbit .content-section{border-radius:12px;border:2px dashed #9333ea}
.layout-skew .content-section{transform:rotate(-0.3deg)}
.layout-accordion .content-section{border:none;border-bottom:2px solid #9333ea;border-radius:0}
.layout-dropcap .sec-body p:first-child::first-letter{float:left;font-size:2.4rem;line-height:1;color:#9333ea;padding-right:8px;font-weight:700}
@media(max-width:768px){
  .layout-checker .content-wrap,.layout-masonry .content-wrap{columns:1;display:block}
  .layout-checker .content-wrap{grid-template-columns:1fr}
  .layout-threecol .sec-body{column-count:1}
  .nav-toggle{display:flex}.site-nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;border-bottom:1px solid #eee;padding:12px 20px}
  .site-nav.is-open{display:block}.site-nav ul{flex-direction:column}.header-row{position:relative;flex-wrap:wrap}
}