:root{
  --paper:#FFF8F2;--surface:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--faint:#8A8298;
  --magenta:#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:1.75;overflow-x:hidden}body.layer-open{overflow:hidden}
a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}button,input{font:inherit}button{color:inherit}a,button,input{outline:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(99,102,241,.28);outline-offset:3px}.masthead{height:72px;background:rgba(255,248,242,.96);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:80;backdrop-filter:blur(12px)}.masthead-inner{height:100%;max-width:var(--max);margin:0 auto;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}.square-action{width:44px;height:44px;border:1px solid var(--border);border-radius:14px;background:#fff;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;transition:.2s}.square-action:hover{transform:translateY(-1px);box-shadow:var(--shadow)}.menu-trigger{justify-self:start;flex-direction:column;gap:4px}.menu-trigger span{width:17px;height:2px;background:var(--ink);border-radius:2px}.brand-mark{justify-self:center;display:flex;align-items:center;min-height:44px}.brand-logo{max-height:38px;width:auto}.brand-text{font-size:23px;font-weight:900;letter-spacing:.08em;color:var(--ink)}.masthead-actions{justify-self:end;display:flex;align-items:center;gap:10px}.search-glyph{width:17px;height:17px;border:2px solid var(--ink);border-radius:50%;display:block;position:relative}.search-glyph:after{content:"";position:absolute;width:7px;height:2px;background:var(--ink);right:-5px;bottom:-2px;transform:rotate(45deg);border-radius:2px}.app-link,.primary-button,.secondary-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;padding:0 20px;border-radius:999px;font-weight:800}.app-link,.primary-button{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff}.secondary-button{background:#fff;color:var(--ink);border:1px solid var(--border)}.chapter-band{height:46px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:72px;z-index:70}.chapter-inner{height:100%;max-width:var(--max);margin:0 auto;display:flex;align-items:center;justify-content:center;gap:42px;padding:0 20px}.chapter-inner a{height:100%;display:inline-flex;align-items:center;position:relative;font-size:14px;font-weight:800;color:var(--muted)}.chapter-inner a:hover{color:var(--ink)}.chapter-inner a.is-current{color:var(--ink)}.chapter-inner a.is-current:after{content:"";position:absolute;left:10%;right:10%;bottom:0;height:3px;background:var(--magenta);border-radius:3px 3px 0 0}.site-main{min-height:60vh}.page-wrap{max-width:var(--max);margin:0 auto;padding:56px 20px 80px}.page-hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(300px,.88fr);gap:36px;align-items:center;margin-bottom:48px}.page-hero.compact{grid-template-columns:1fr;max-width:860px}.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:900;letter-spacing:.12em;color:var(--magenta);text-transform:uppercase}.eyebrow:before{content:"";width:18px;height:3px;background:currentColor;border-radius:3px}.page-hero h1,.cover-copy h1{margin:12px 0 16px;color:var(--ink);font-size:clamp(28px,4vw,34px);line-height:1.25;letter-spacing:-.02em}.lead{font-size:17px;color:var(--muted);margin:0;max-width:760px}.hero-art,.media-slot{background:linear-gradient(135deg,#fff,#F3EBE3);border:1px solid var(--border);border-radius:22px;min-height:240px;overflow:hidden;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow);position:relative}.hero-art:empty:after,.media-slot:empty:after{content:"";width:44%;height:44%;border-radius:50%;border:20px solid rgba(99,102,241,.08);box-shadow:80px 30px 0 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8px;color:var(--ink);font-size:19px}.paper-card p,.color-card p,.index-card p,.note-card p{margin:0;color:var(--muted)}.paper-card a,.index-card a,.text-link{color:var(--indigo);font-weight:800}.card-label{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;font-size:12px;font-weight:900;color:var(--muted)}.dot{width:9px;height:9px;border-radius:50%;background:var(--magenta)}.dot.indigo{background:var(--indigo)}.dot.cyan{background:var(--cyan)}.dot.amber{background:var(--amber)}.dot.mint{background:var(--mint)}.tag-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.tag-item{padding:18px 16px;border-top:1px solid var(--border);background:rgba(255,255,255,.52)}.tag-item strong{display:flex;align-items:center;gap:9px;color:var(--ink);margin-bottom:5px}.tag-item p{margin:0 0 8px;color:var(--muted);font-size:14px}.tag-item a{font-size:13px;font-weight:900;color:var(--indigo)}.feature-row{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:30px;align-items:center}.feature-copy{background:#fff;border:1px solid var(--border);border-radius:22px;padding:30px;box-shadow:var(--shadow)}.feature-copy h2{margin:0 0 14px;color:var(--ink);font-size:28px}.feature-copy p{margin:0 0 14px}.chapter-list{display:grid;gap:10px;margin:18px 0 0}.chapter-list a{display:grid;grid-template-columns:48px 1fr;gap:12px;align-items:center;padding:12px 0;border-top:1px solid var(--border)}.chapter-list strong{font-size:20px;color:var(--magenta)}.chapter-list span{font-weight:800;color:var(--ink)}.uneven-grid{display:grid;grid-template-columns:1.15fr .85fr .95fr;gap:18px;align-items:start}.uneven-grid .paper-card:nth-child(2){margin-top:34px}.uneven-grid .paper-card:nth-child(3){margin-top:12px}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.step{background:#fff;border:1px solid var(--border);border-radius:20px;padding:22px;position:relative}.step:before{counter-increment:step;content:"0" counter(step);display:block;font-size:28px;line-height:1;font-weight:900;color:var(--indigo);margin-bottom:14px}.step:nth-child(2):before{color:var(--magenta)}.step:nth-child(3):before{color:var(--cyan)}.step:nth-child(4):before{color:var(--amber)}.step h3{margin:0 0 8px;color:var(--ink)}.step p{margin:0;color:var(--muted)}.masonry-themes{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;align-items:start}.masonry-themes .color-card:nth-child(2),.masonry-themes .color-card:nth-child(5){min-height:210px}.masonry-themes .color-card{border-top:5px solid var(--magenta)}.masonry-themes .color-card:nth-child(2){border-top-color:var(--indigo)}.masonry-themes .color-card:nth-child(3){border-top-color:var(--cyan)}.masonry-themes .color-card:nth-child(4){border-top-color:var(--amber)}.masonry-themes .color-card:nth-child(5){border-top-color:var(--mint)}.masonry-themes .color-card:nth-child(6){border-top-color:var(--magenta)}.shelf-list{border:1px solid var(--border);border-radius:22px;background:#fff;overflow:hidden}.shelf-item{display:grid;grid-template-columns:110px 1fr auto;gap:18px;align-items:center;padding:22px;border-top:1px solid var(--border)}.shelf-item:first-child{border-top:0}.shelf-mark{height:68px;border-radius:12px;background:var(--soft);display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900;color:var(--ink)}.shelf-item h3{margin:0 0 5px;color:var(--ink)}.shelf-item p{margin:0;color:var(--muted)}.number-list{display:grid;gap:12px}.number-item{display:grid;grid-template-columns:88px 1fr;gap:18px;align-items:start;background:#fff;border:1px solid var(--border);border-radius:18px;padding:20px}.big-number{font-size:44px;line-height:1;font-weight:950;color:var(--magenta)}.number-item:nth-child(2) .big-number{color:var(--indigo)}.number-item:nth-child(3) .big-number{color:var(--cyan)}.number-item:nth-child(4) .big-number{color:var(--amber)}.number-item:nth-child(5) .big-number{color:var(--mint)}.number-item h3{margin:0 0 6px;color:var(--ink)}.number-item p{margin:0;color:var(--muted)}.timeline{position:relative;padding-left:30px}.timeline:before{content:"";position:absolute;left:8px;top:10px;bottom:10px;width:2px;background:linear-gradient(var(--indigo),var(--magenta),var(--amber))}.timeline-item{position:relative;padding:0 0 28px 22px}.timeline-item:before{content:"";position:absolute;left:-28px;top:8px;width:14px;height:14px;border-radius:50%;background:#fff;border:4px solid var(--indigo)}.timeline-item:nth-child(2):before{border-color:var(--magenta)}.timeline-item:nth-child(3):before{border-color:var(--amber)}.timeline-item h3{margin:0 0 5px;color:var(--ink)}.status{display:inline-flex;padding:4px 10px;border-radius:999px;background:var(--soft);color:var(--ink);font-size:12px;font-weight:900;margin-bottom:8px}.prose{max-width:820px}.prose h2{margin:38px 0 12px;color:var(--ink);font-size:24px}.prose h3{margin:26px 0 8px;color:var(--ink);font-size:19px}.prose p{margin:0 0 16px;color:var(--text)}.prose ul{padding-left:22px}.prose li{margin:8px 0}.editor-note{border-left:4px solid var(--magenta);background:#fff;padding:18px 20px;border-radius:0 16px 16px 0;margin:20px 0;color:var(--text)}.editor-note strong{color:var(--magenta)}.notice{padding:18px 20px;background:#fff;border:1px solid var(--border);border-radius:16px;color:var(--muted)}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--border);border-radius:18px;padding:22px}.faq-item h2,.faq-item h3{margin:0 0 8px;color:var(--ink);font-size:18px}.faq-item p{margin:0;color:var(--text)}.contact-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.contact-card{background:#fff;border:1px solid var(--border);border-radius:20px;padding:24px}.contact-card h2{margin:0 0 8px;color:var(--ink);font-size:20px}.contact-card p{margin:0 0 12px}.contact-card a{font-weight:900;color:var(--indigo)}.cover{max-width:var(--max);margin:0 auto;padding:46px 20px 18px;display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.9fr);gap:36px;align-items:center}.cover-copy{position:relative;padding-left:34px}.vertical-title{position:absolute;left:0;top:6px;writing-mode:vertical-rl;color:var(--magenta);font-weight:900;letter-spacing:.18em;font-size:12px}.cover-copy p{max-width:650px;color:var(--muted);font-size:17px}.cover-art{max-height:360px;min-height:300px}.cover-art img{max-height:360px;width:100%;object-fit:contain}.home-section{max-width:var(--max);margin:0 auto;padding:38px 20px}.home-section.alt{padding-top:48px;padding-bottom:48px}.dual-info{display:grid;grid-template-columns:1fr 1fr;gap:18px}.policy-card{background:var(--soft);border-radius:20px;padding:24px}.policy-card h3{margin:0 0 8px;color:var(--ink)}.policy-card p{margin:0;color:var(--text)}.site-footer{background:var(--ink);color:#F7EFE6;padding:52px 20px calc(28px + env(safe-area-inset-bottom))}.footer-inner{max-width:var(--max);margin:0 auto}.footer-brand{display:grid;grid-template-columns:minmax(220px,.7fr) minmax(0,1.3fr);gap:36px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.12)}.footer-logo-link{display:flex;align-items:center;gap:14px}.footer-logo{max-height:36px;width:auto}.footer-logo-link span{display:flex;flex-direction:column}.footer-logo-link strong{font-size:20px}.footer-logo-link small{color:rgba(247,239,230,.68);letter-spacing:.12em}.footer-brand p{margin:0;color:rgba(247,239,230,.78)}.footer-directory{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;padding:30px 0}.footer-directory h2{font-size:14px;margin:0 0 12px;color:#fff}.footer-directory a{display:block;color:rgba(247,239,230,.78);margin:7px 0;font-size:14px}.footer-directory a:hover{color:#fff}.footer-bottom{display:flex;justify-content:space-between;gap:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(247,239,230,.65)}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.48);z-index:110;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.book-menu-shell,.search-shell{position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;padding:20px;visibility:hidden;pointer-events:none;opacity:0;transition:.2s}.book-menu-shell.is-open,.search-shell.is-open{visibility:visible;pointer-events:auto;opacity:1}.book-menu{width:min(840px,100%);max-height:calc(100vh - 40px);overflow:auto;background:#fff;border-radius:22px;box-shadow:0 30px 80px rgba(26,18,48,.28)}.book-menu-head,.search-card-head{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:18px 22px;border-bottom:1px solid var(--border)}.book-brand{display:flex;align-items:center;gap:12px}.book-brand img{max-height:30px;width:auto}.book-brand span{display:flex;flex-direction:column}.book-brand small{font-size:10px;color:var(--faint);letter-spacing:.1em}.close-button{width:44px;height:44px;border:1px solid var(--border);background:#fff;border-radius:50%;font-size:28px;line-height:1;cursor:pointer}.book-pages{display:grid;grid-template-columns:1fr 1fr;background:linear-gradient(90deg,#fff 0,#fff 49.8%,#F6EFE9 50%,#fff 50.2%,#fff 100%)}.book-group{padding:24px 30px}.book-group h2{font-size:13px;letter-spacing:.16em;color:var(--magenta);margin:0 0 10px}.book-entry{display:block;padding:12px 0;border-top:1px solid var(--border)}.book-entry strong{display:block;color:var(--ink)}.book-entry span{display:block;color:var(--muted);font-size:13px;margin-top:2px}.search-card{width:min(620px,100%);background:#fff;border-radius:22px;box-shadow:0 30px 80px rgba(26,18,48,.28)}.search-card-head h2{margin:3px 0 0;color:var(--ink);font-size:22px}.search-box{margin:22px;display:flex;align-items:center;gap:12px;background:var(--soft);border-radius:16px;padding:0 16px}.search-box input{width:100%;min-height:54px;border:0;background:transparent;color:var(--ink)}.search-presets{padding:0 22px 18px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.search-presets a{min-height:44px;display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid var(--border);border-radius:999px;font-weight:800;color:var(--ink)}.search-note{margin:0;padding:16px 22px 22px;color:var(--faint);font-size:13px}.mobile-bottom-nav{display:none}.app-showcase{display:grid;grid-template-columns:340px 1fr;gap:34px;align-items:center}.phone-frame{background:var(--ink);border-radius:34px;padding:10px;box-shadow:var(--shadow)}.phone-screen{background:#fff;border-radius:26px;min-height:480px;padding:24px;overflow:hidden}.phone-screen img{width:100%;height:auto;max-height:430px;object-fit:contain}.app-icon-line{display:flex;align-items:center;gap:14px}.app-icon-line img{width:64px;height:64px;object-fit:contain;border-radius:16px}.app-icon-placeholder{width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--indigo),var(--magenta));display:block}.badge-list{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.badge{padding:7px 11px;border-radius:999px;background:var(--soft);font-size:12px;font-weight:900;color:var(--ink)}
@media(max-width:900px){.chapter-inner{gap:22px}.card-grid.four,.tag-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.card-grid,.masonry-themes{grid-template-columns:repeat(2,minmax(0,1fr))}.uneven-grid{grid-template-columns:1fr 1fr}.uneven-grid .paper-card:nth-child(3){grid-column:1/-1;margin-top:0}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.page-hero,.cover,.feature-row{grid-template-columns:1fr}.cover-art{max-width:720px;width:100%;margin:0 auto}.app-showcase{grid-template-columns:280px 1fr}.footer-directory{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:680px){body{padding-bottom:calc(50px + env(safe-area-inset-bottom))}.masthead-inner{grid-template-columns:44px minmax(0,1fr) auto;padding:0 16px;gap:10px}.brand-mark{max-width:100%;overflow:hidden}.brand-logo{max-width:150px}.brand-text{font-size:19px;white-space:nowrap}.search-trigger{display:none}.app-link{padding:0 14px;font-size:13px;min-width:76px}.chapter-band{display:none}.page-wrap{padding:38px 16px 58px}.page-hero{gap:24px;margin-bottom:36px}.hero-art,.media-slot{min-height:190px}.cover{padding:34px 16px 10px;gap:24px}.cover-copy{padding-left:28px}.cover-art{min-height:220px}.home-section{padding:30px 16px}.card-grid,.card-grid.two,.card-grid.four,.tag-grid,.masonry-themes,.uneven-grid,.steps,.dual-info,.contact-grid{grid-template-columns:1fr}.uneven-grid .paper-card:nth-child(2),.uneven-grid .paper-card:nth-child(3){margin-top:0}.shelf-item{grid-template-columns:76px 1fr}.shelf-item>a{grid-column:2}.number-item{grid-template-columns:66px 1fr}.big-number{font-size:36px}.footer-brand{grid-template-columns:1fr}.footer-directory{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column}.book-menu-shell,.search-shell{padding:12px}.book-menu{max-height:calc(100vh - 24px)}.book-pages{grid-template-columns:1fr;background:#fff}.book-group{padding:18px 22px}.book-group+.book-group{border-top:1px solid var(--border)}.search-presets{grid-template-columns:1fr 1fr}.mobile-bottom-nav{position:fixed;z-index:75;left:0;right:0;bottom:0;min-height:50px;padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid var(--border);display:grid;grid-template-columns:repeat(5,1fr)}.mobile-bottom-nav a{min-height:50px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;font-size:11px;color:var(--muted)}.mobile-bottom-nav a span{font-size:16px;line-height:1}.mobile-bottom-nav a.is-current{color:var(--magenta);font-weight:900}.app-showcase{grid-template-columns:1fr}.phone-frame{max-width:320px;margin:0 auto;width:100%}.phone-screen{min-height:420px}}
.no-bottom-margin{margin-bottom:0}.about-home-heading{color:var(--ink);font-size:28px;margin:10px 0 14px}.app-reading-preview{display:flex;flex-direction:column;justify-content:center}.app-reading-preview h2{color:var(--ink);font-size:24px;line-height:1.35;margin:14px 0}.app-reading-preview p{color:var(--muted)}