*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#FFF8F2;color:#2C2440;font:16px/1.75 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}img{max-width:100%;height:auto;display:block}.skip-link{position:fixed;left:16px;top:-80px;z-index:9999;background:#fff;padding:10px 14px;border-radius:999px}.skip-link:focus{top:12px}.masthead{position:fixed;inset:0 0 auto 0;height:72px;background:#FFF8F2;border-bottom:1px solid rgba(26,18,48,.1);z-index:100}.masthead-inner{max-width:1160px;height:100%;margin:auto;padding:0 16px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.square-btn,.close-btn,.text-btn{min-width:44px;min-height:44px;border:1px solid rgba(26,18,48,.12);background:#fff;color:#1A1230;border-radius:14px;cursor:pointer}.square-btn{justify-self:start}.brand{display:flex;align-items:center;justify-content:center;min-height:44px}.brand-logo{max-height:38px;width:auto}.brand-text{font-weight:900;letter-spacing:.14em;color:#1A1230}.masthead-actions{justify-self:end;display:flex;gap:8px;align-items:center}.text-btn{display:inline-flex;align-items:center;justify-content:center;padding:0 14px}.app-top{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;border:none}.chapter-bar{position:fixed;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid rgba(26,18,48,.1);z-index:90}.chapter-inner{max-width:900px;height:100%;margin:auto;display:flex;align-items:center;justify-content:center;gap:34px}.chapter-inner a{height:46px;display:flex;align-items:center;position:relative;color:#5A5270;font-weight:700}.chapter-inner a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:#E11D8F;border-radius:3px 3px 0 0}.site-main{padding-top:118px}.wrap{max-width:1160px;margin:0 auto;padding:0 16px}.section{padding:64px 0}.section.compact{padding:42px 0}.hero{padding:56px 0 44px}.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:42px;align-items:center}.eyebrow{font-size:13px;letter-spacing:.2em;text-transform:uppercase;color:#E11D8F;font-weight:800;margin:0 0 10px}.hero h1,.page-hero h1{font-size:clamp(28px,4vw,34px);line-height:1.22;margin:0 0 18px;color:#1A1230}.hero p,.page-hero p{max-width:760px}.hero-media,.media-slot{background:#F3EBE3;border:1px solid rgba(26,18,48,.08);border-radius:22px;min-height:220px;display:flex;align-items:center;justify-content:center;overflow:hidden}.hero-media img{max-height:360px;object-fit:contain}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border-radius:999px;font-weight:800;border:1px solid rgba(26,18,48,.12);background:#fff}.btn.primary{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;border:none}.section-head{display:flex;justify-content:space-between;gap:18px;align-items:end;margin-bottom:24px}.section-head h2{margin:0;font-size:26px;color:#1A1230}.section-head p{margin:0;max-width:620px;color:#5A5270}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tag-card,.card,.paper-card,.note-card{background:#fff;border:1px solid rgba(26,18,48,.1);box-shadow:0 14px 34px rgba(26,18,48,.08);border-radius:18px;padding:20px}.tag-card{box-shadow:none}.dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px;background:#E11D8F}.tag-card:nth-child(4n+2) .dot{background:#6366F1}.tag-card:nth-child(4n+3) .dot{background:#0891B2}.tag-card:nth-child(4n) .dot{background:#D97706}.tag-card h3,.card h3{margin:10px 0 6px;color:#1A1230}.tag-card p,.card p{margin:0;color:#5A5270}.chapter-list{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:24px}.chapter-list a{background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:16px;padding:18px}.chapter-list b{display:block;color:#6366F1;font-size:22px}.masonry{columns:3 260px;column-gap:18px}.masonry .card{break-inside:avoid;margin:0 0 18px}.card img,.paper-card img{border-radius:14px;margin-bottom:16px;max-height:300px;object-fit:contain;width:100%;background:#F3EBE3}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.step{padding:22px;border-left:4px solid #6366F1;background:#fff;border-radius:0 18px 18px 0}.step:nth-child(2){border-color:#E11D8F}.step:nth-child(3){border-color:#0891B2}.step:nth-child(4){border-color:#D97706}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.theme-card{min-height:180px;background:#fff;border-radius:20px;padding:22px;border:1px solid rgba(26,18,48,.1)}.theme-card:nth-child(2),.theme-card:nth-child(5){min-height:220px}.shelf-list{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:60px 1fr auto;gap:16px;align-items:center;background:#fff;padding:16px 18px;border-radius:16px;border:1px solid rgba(26,18,48,.1)}.shelf-row .num{font-size:26px;font-weight:900;color:#E11D8F}.big-rank{display:grid;gap:14px}.rank-row{display:grid;grid-template-columns:90px 1fr;gap:18px;align-items:center;background:#fff;border-radius:18px;padding:18px;border:1px solid rgba(26,18,48,.1)}.rank-row strong{font-size:44px;line-height:1;color:#6366F1}.rank-row:nth-child(2) strong{color:#E11D8F}.rank-row:nth-child(3) strong{color:#0891B2}.rank-row:nth-child(4) strong{color:#D97706}.rank-row:nth-child(5) strong{color:#059669}.timeline{position:relative;margin-left:12px;padding-left:34px;border-left:2px solid rgba(99,102,241,.3)}.timeline article{position:relative;background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:18px;padding:20px;margin-bottom:16px}.timeline article:before{content:"";position:absolute;left:-43px;top:26px;width:16px;height:16px;border-radius:50%;background:#6366F1;border:4px solid #FFF8F2}.status{display:inline-flex;padding:4px 10px;border-radius:999px;background:#F3EBE3;color:#5A5270;font-size:13px;font-weight:800}.page-hero{padding:54px 0 24px}.page-hero .hero-inner{background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:22px;padding:30px}.content-grid{display:grid;grid-template-columns:2fr 1fr;gap:24px}.article-stack{display:grid;gap:18px}.article-stack article,.prose{background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:20px;padding:24px}.article-stack h2,.prose h2{margin:0 0 10px;color:#1A1230;font-size:22px}.article-stack h3{color:#1A1230}.article-stack p,.prose p{margin:0 0 14px}.article-stack p:last-child,.prose p:last-child{margin-bottom:0}.aside-box{background:#F3EBE3;border-radius:20px;padding:22px;height:max-content;position:sticky;top:138px}.aside-box h2{font-size:18px;margin-top:0}.aside-box a{display:block;padding:9px 0;border-bottom:1px solid rgba(26,18,48,.1)}.faq{display:grid;gap:14px}.faq details{background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:16px;padding:16px 18px}.faq summary{cursor:pointer;font-weight:800;color:#1A1230}.faq p{margin:12px 0 0}.app-panel{display:grid;grid-template-columns:1fr 1fr;gap:28px;align-items:center;background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:22px;padding:26px}.app-visuals{display:flex;gap:16px;align-items:center;justify-content:center;flex-wrap:wrap}.app-visuals img:first-child{max-height:340px}.app-visuals img:last-child{width:84px;height:84px;object-fit:contain;border-radius:18px}.site-footer{background:#1A1230;color:#F7EFE6;padding:54px 0 calc(38px + env(safe-area-inset-bottom))}.footer-inner{max-width:1160px;margin:auto;padding:0 16px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:28px}.footer-logo{max-height:34px;width:auto}.footer-brand strong,.footer-brand span{display:block}.footer-brand span{opacity:.68;font-size:13px;letter-spacing:.14em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid h2{font-size:15px;margin:0 0 10px;color:#fff}.footer-grid a{display:block;color:#F7EFE6;opacity:.78;padding:4px 0}.footer-note{margin-top:28px;max-width:820px;opacity:.78}.copyright{opacity:.58;font-size:14px}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.46);z-index:190;opacity:0;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;pointer-events:auto}.book-menu,.search-layer{position:fixed;inset:0;z-index:200;display:grid;place-items:center;padding:20px;visibility:hidden;pointer-events:none}.book-menu.is-open,.search-layer.is-open{visibility:visible;pointer-events:auto}.book-menu-shell{width:min(840px,96vw);max-height:86vh;overflow:auto;background:#FFF8F2;border-radius:22px;box-shadow:0 28px 70px rgba(26,18,48,.25)}.book-menu-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid rgba(26,18,48,.1);position:sticky;top:0;background:#FFF8F2;z-index:2}.book-brand{display:flex;gap:12px;align-items:center}.book-brand img{max-height:32px;width:auto}.book-brand strong,.book-brand span{display:block}.book-brand span{font-size:12px;color:#8A8298}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:22px 26px}.book-page:first-child{border-right:1px solid rgba(26,18,48,.1)}.book-page section+section{margin-top:26px}.book-page h2{font-size:16px;color:#E11D8F}.book-page a{display:block;padding:11px 0;border-bottom:1px solid rgba(26,18,48,.08)}.book-page b,.book-page span{display:block}.book-page span{font-size:13px;color:#5A5270}.search-card{width:min(620px,96vw);background:#fff;border-radius:22px;padding:26px;position:relative}.search-card .close-btn{position:absolute;right:18px;top:18px}.fake-search{display:flex;align-items:center;gap:10px;border:1px solid rgba(26,18,48,.14);padding:0 14px;border-radius:999px;margin:18px 0}.fake-search input{border:0;outline:0;width:100%;min-height:48px;background:transparent;color:#1A1230}.search-tip{color:#8A8298}.search-links{display:flex;gap:10px;flex-wrap:wrap}.search-links a{padding:9px 14px;border-radius:999px;background:#F3EBE3}.layer-open{overflow:hidden}.mobile-nav{display:none}:focus-visible{outline:3px solid rgba(225,29,143,.35);outline-offset:3px}@media (max-width:820px){.chapter-bar{display:none}.site-main{padding-top:72px}.masthead-inner{grid-template-columns:52px 1fr auto}.search-top{display:none}.chapter-list,.steps{grid-template-columns:1fr 1fr}.tag-grid{grid-template-columns:1fr 1fr}.theme-grid{grid-template-columns:1fr 1fr}.hero-grid,.content-grid,.app-panel{grid-template-columns:1fr}.aside-box{position:static}.footer-grid{grid-template-columns:1fr 1fr}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid rgba(26,18,48,.1)}.site-footer{padding-bottom:calc(86px + env(safe-area-inset-bottom))}.mobile-nav{position:fixed;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid rgba(26,18,48,.1);display:grid;grid-template-columns:repeat(5,1fr);z-index:80}.mobile-nav a{display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}.mobile-nav a.active{color:#E11D8F}.section{padding:48px 0}.hero{padding-top:36px}}@media (max-width:560px){.masthead-inner{padding:0 12px;gap:6px}.text-btn{padding:0 10px}.hero-grid{gap:24px}.tag-grid,.steps,.theme-grid,.footer-grid,.chapter-list{grid-template-columns:1fr}.masonry{columns:1}.shelf-row{grid-template-columns:48px 1fr}.shelf-row>a{grid-column:2}.rank-row{grid-template-columns:64px 1fr}.rank-row strong{font-size:36px}.book-menu,.search-layer{padding:10px}.book-menu-shell{max-height:92vh}.book-page{padding:18px}.page-hero .hero-inner{padding:22px}.section-head{display:block}.section-head p{margin-top:8px}}