:root{--paper:#FFF8F2;--white:#fff;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--light:#8A8298;--mag:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--border:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08);--radius:20px;--max:1160px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.78;overflow-x:hidden}body.modal-open{overflow:hidden}a{color:inherit;text-decoration:none}button{font:inherit}img{max-width:100%;height:auto;display:block}.masthead{height:72px;position:fixed;z-index:80;top:0;left:0;right:0;background:rgba(255,248,242,.96);border-bottom:1px solid var(--border);backdrop-filter:blur(10px)}.masthead__inner{height:100%;max-width:var(--max);margin:auto;padding:0 24px;display:grid;grid-template-columns:1fr auto 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span:nth-child(4){background:var(--amber)}.accent-strip span:nth-child(5){background:var(--mint)}
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@media(max-width:700px){.masthead__inner{padding:0 16px;grid-template-columns:44px 1fr auto;gap:8px}.masthead__actions .search-button{display:none}.app-link{padding:0 14px;font-size:14px}.brand__text{font-size:20px}.chapter-band{display:none}.site-main{padding-top:72px}.container{padding:0 16px}.section{padding:46px 0}.cover{padding:32px 0}.cover__grid,.page-hero__grid,.mag-layout,.app-showcase{grid-template-columns:1fr}.cover__copy{grid-template-columns:1fr}.cover__vertical{writing-mode:horizontal-tb}.cover__art{min-height:200px}.page-hero{padding:38px 0 24px}.section-head{align-items:flex-start;flex-direction:column}.tag-grid,.step-grid,.theme-grid,.masonry-three,.content-grid,.content-grid.three,.app-points{grid-template-columns:1fr}.theme-card,.theme-card:nth-child(2),.theme-card:nth-child(5){min-height:auto}.shelf-row{grid-template-columns:1fr;gap:6px}.rank-grid{grid-template-columns:1fr}.book-menu{max-height:86vh}.book-pages{grid-template-columns:1fr}.book-page{padding:20px}.book-page:first-child{border-right:0;border-bottom:1px solid var(--border)}.preset-links{grid-template-columns:repeat(2,1fr)}.footer__inner{padding-bottom:110px}.footer-grid{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.mobile-bottom{position:fixed;z-index:75;bottom:0;left:0;right:0;display:grid;grid-template-columns:repeat(5,1fr);min-height:50px;padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.96);border-top:1px solid var(--border);backdrop-filter:blur(10px)}.mobile-bottom a{min-height:50px;display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:11px;color:var(--muted)}.mobile-bottom a span{font-size:17px;line-height:1.1}.mobile-bottom a.is-current{color:var(--mag);font-weight:900}.site-footer{margin-bottom:calc(50px + env(safe-area-inset-bottom))}}
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