:root{--paper:#FFF8F2;--white:#fff;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--aux:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--border:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font:16px/1.8 system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;object-fit:contain}.masthead{position:fixed;z-index:50;top:0;left:0;right:0;height:72px;background:var(--paper);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 max(16px,calc((100vw - 1160px)/2));border-bottom:1px solid var(--border)}.square-btn,.search-btn,.close-btn{border:0;background:transparent;color:var(--ink);min-width:44px;min-height:44px;font:inherit;cursor:pointer}.square-btn{justify-self:start;border:1px solid var(--border);border-radius:12px}.brand{justify-self:center;font-weight:800;font-size:22px;color:var(--ink)}.brand-logo{max-height:38px;width:auto}.mast-actions{justify-self:end;display:flex;align-items:center;gap:8px}.app-link,.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;min-height:44px;border-radius:999px;padding:0 18px;font-weight:700}.app-link,.btn-primary{color:#fff;background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%)}.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--border)}.chapterbar{position:fixed;z-index:45;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid var(--border);display:flex;justify-content:center;align-items:center;gap:36px}.chapterbar a{height:46px;display:flex;align-items:center;position:relative;color:var(--muted)}.chapterbar a.active,.chapterbar a:hover{color:var(--ink)}.chapterbar a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--pink);border-radius:3px 3px 0 0}main{padding-top:118px}.container{width:min(1160px,calc(100% - 32px));margin:0 auto}.section{padding:58px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:24px}.section-head h2{margin:0;color:var(--ink);font-size:clamp(24px,3vw,32px)}.eyebrow{letter-spacing:.16em;color:var(--pink);font-weight:800;font-size:13px}.hero{padding:46px 0 54px}.hero-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.82fr);gap:44px;align-items:center}.hero h1,.page-hero h1{font-size:clamp(28px,4vw,34px);line-height:1.25;color:var(--ink);margin:10px 0 18px}.hero p,.page-hero p{color:var(--muted)}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.hero-media img{max-height:360px;margin:auto;border-radius:22px}.card,.paper-card,.feature-card,.timeline-item,.faq-item{background:#fff;border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow)}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tag-card{padding:18px;background:#fff;border:1px solid var(--border);border-radius:16px}.dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.pink{background:var(--pink)}.indigo{background:var(--indigo)}.cyan{background:var(--cyan)}.amber{background:var(--amber)}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(260px,.65fr);gap:34px;align-items:center}.split.reverse{grid-template-columns:minmax(260px,.65fr) minmax(0,1fr)}.split.reverse .media{order:-1}.media img{max-height:360px;margin:auto;border-radius:18px}.chapter-list{display:grid;gap:10px;margin-top:20px}.chapter-list a{display:flex;gap:14px;align-items:center;padding:14px 0;border-top:1px solid var(--border)}.chapter-list b{font-size:22px;color:var(--pink)}.uneven-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:18px;align-items:start}.feature-card{padding:22px}.feature-card:nth-child(2){margin-top:28px}.feature-card img{max-height:210px;margin:0 auto 16px}.steps,.six-grid,.number-grid,.shelf-list{display:grid;gap:16px}.steps{grid-template-columns:repeat(4,1fr)}.step,.theme-box{padding:20px;border-radius:18px;background:#fff;border:1px solid var(--border)}.step b{display:block;color:var(--pink);font-size:20px}.six-grid{grid-template-columns:repeat(3,1fr)}.theme-box:nth-child(2n){transform:translateY(12px)}.shelf-row{display:grid;grid-template-columns:80px 1fr auto;gap:18px;align-items:center;padding:18px 0;border-bottom:1px solid var(--border)}.shelf-no{font-size:30px;color:var(--indigo);font-weight:800}.number-grid{grid-template-columns:repeat(5,1fr)}.number-card{padding:22px;border-radius:18px;background:#fff;border:1px solid var(--border)}.number-card strong{font-size:38px;color:var(--pink)}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--border)}.timeline-item{position:relative;padding:18px 20px;margin:0 0 16px}.timeline-item:before{content:"";position:absolute;left:-26px;top:26px;width:12px;height:12px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 5px var(--paper)}.status{display:inline-block;padding:3px 10px;border-radius:999px;background:var(--soft);font-size:13px;color:var(--muted)}.page-hero{padding:52px 0 26px}.page-hero .container{max-width:900px}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.paper-card{padding:24px}.paper-card h2,.paper-card h3{color:var(--ink);margin-top:0}.paper-card p:last-child{margin-bottom:0}.long-copy{max-width:860px;margin:0 auto}.long-copy h2{color:var(--ink);margin-top:34px}.quote-note{border-left:4px solid var(--pink);padding:8px 0 8px 18px;color:var(--muted);background:linear-gradient(90deg,rgba(225,29,143,.06),transparent)}.faq-list{display:grid;gap:14px}.faq-item{padding:22px}.faq-item h2{font-size:19px;margin:0 0 8px;color:var(--ink)}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.46);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.show{opacity:1;visibility:visible;pointer-events:auto}.modal{position:fixed;z-index:90;left:50%;top:50%;transform:translate(-50%,-48%) scale(.98);width:min(840px,calc(100% - 32px));max-height:82vh;overflow:auto;background:#fff;border-radius:22px;box-shadow:0 24px 80px rgba(26,18,48,.26);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.modal.show{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}.modal-head{position:sticky;top:0;z-index:2;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:18px 22px;border-bottom:1px solid var(--border)}.menu-brand{display:flex;gap:12px;align-items:center}.menu-brand img{max-height:32px;max-width:140px}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:24px}.book-page:first-child{border-right:1px solid var(--border)}.book-page h3{color:var(--pink);margin:0 0 10px}.book-page a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.book-page b{display:block;color:var(--ink)}.book-page span{font-size:13px;color:var(--muted)}.search-modal{max-width:620px}.fake-search{margin:24px;border:1px solid var(--border);border-radius:999px;padding:14px 18px;color:var(--aux)}.preset-links{padding:0 24px 28px;display:flex;flex-wrap:wrap;gap:10px}.preset-links a{padding:9px 14px;border-radius:999px;background:var(--soft)}.locked{overflow:hidden}.site-footer{background:var(--ink);color:#F7EFE6;padding:50px max(16px,calc((100vw - 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@media(max-width:560px){.container{width:min(100% - 32px,1160px)}.mast-actions{gap:0}.app-link{padding:0 12px}.hero{padding-top:34px}.tag-grid,.steps,.six-grid,.number-grid{grid-template-columns:1fr}.shelf-row{grid-template-columns:54px 1fr}.shelf-row .status{grid-column:2}.section{padding:42px 0}.footer-grid{grid-template-columns:1fr 1fr;gap:18px}.modal{width:calc(100% - 20px);max-height:88vh}.book-page{padding:20px}.section-head{align-items:flex-start;flex-direction:column}}