:root{--paper:#FFF8F2;--white:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--faint:#8A8298;--mag:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth;overflow-x:hidden}body{margin:0;background:var(--paper);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.masthead{position:fixed;top:0;left:0;right:0;height:72px;background:rgba(255,248,242,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);z-index:40}.masthead-inner{max-width:1160px;height:100%;margin:auto;padding:0 20px;display:grid;grid-template-columns:160px 1fr 160px;align-items:center}.square-btn{width:44px;height:44px;border:1px solid var(--line);background:#fff;border-radius:14px;display:grid;place-content:center;gap:4px;cursor:pointer}.square-btn span{width:18px;height:2px;background:var(--ink);display:block;border-radius:2px}.brand-mark{justify-self:center;display:flex;align-items:center;min-height:44px}.brand-mark strong{font-size:24px;letter-spacing:.12em;color:var(--ink)}.brand-logo{display:block;max-width:220px;max-height:38px;width:auto;height:auto;object-fit:contain}.mast-actions{justify-self:end;display:flex;gap:10px;align-items:center}.search-btn,.app-link,.close-btn{min-height:44px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}.app-link{display:inline-flex;align-items:center;background:linear-gradient(135deg,var(--indigo),var(--mag) 55%,var(--amber));color:#fff;border:none}.chapter-bar{position:fixed;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid var(--line);z-index:35}.chapter-inner{max-width:760px;height:100%;margin:auto;display:flex;justify-content:space-between;align-items:center}.chapter-inner a{height:100%;display:flex;align-items:center;position:relative;color:var(--muted);padding:0 10px}.chapter-inner a.active{color:var(--ink);font-weight:700}.chapter-inner a.active:after{content:"";position:absolute;left:10px;right:10px;bottom:0;height:3px;background:var(--mag);border-radius:4px 4px 0 0}.site-main{padding-top:142px;min-height:60vh}.wrap{max-width:1160px;margin:0 auto;padding:0 20px}.hero{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(280px,.92fr);gap:42px;align-items:center;padding:38px 0 62px}.hero.no-media{grid-template-columns:1fr}.kicker{display:inline-block;color:var(--mag);font-weight:800;letter-spacing:.12em;margin-bottom:8px}.hero h1,.page-hero h1{font-size:clamp(28px,4vw,34px);line-height:1.25;color:var(--ink);margin:0 0 18px}.hero p,.page-hero p{font-size:17px;color:var(--muted);max-width:760px}.hero-media img,.section-media img,.app-visual img,.content-image img{display:block;max-width:100%;max-height:360px;width:auto;height:auto;margin:auto;object-fit:contain;border-radius:22px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn-primary,.btn-secondary{min-height:44px;border-radius:999px;padding:10px 18px;display:inline-flex;align-items:center;justify-content:center}.btn-primary{background:linear-gradient(135deg,var(--indigo),var(--mag) 55%,var(--amber));color:#fff}.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.section{padding:46px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-head h2{margin:0;color:var(--ink);font-size:26px}.section-head p{margin:0;color:var(--muted);max-width:620px}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tag-card,.card,.note-card,.policy-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:18px;padding:20px}.tag-card{box-shadow:none}.tag-card .dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.dot.mag{background:var(--mag)}.dot.indigo{background:var(--indigo)}.dot.cyan{background:var(--cyan)}.dot.amber{background:var(--amber)}.tag-card h3,.card h3,.note-card h3,.policy-card h3{margin:4px 0 8px;color:var(--ink);font-size:19px}.tag-card p,.card p,.note-card p,.policy-card p{margin:0;color:var(--muted)}.tag-card a,.text-link{display:inline-block;margin-top:10px;color:var(--indigo);font-weight:700}.feature-split{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:28px;align-items:center}.feature-split.no-media{grid-template-columns:1fr}.chapter-list{display:grid;gap:10px}.chapter-item{display:grid;grid-template-columns:54px 1fr;gap:14px;padding:14px 0;border-bottom:1px solid var(--line)}.chapter-item strong{font-size:22px;color:var(--mag)}.chapter-item h3{margin:0;color:var(--ink)}.chapter-item p{margin:4px 0 0;color:var(--muted)}.uneven-grid{display:grid;grid-template-columns:1.15fr .85fr 1fr;gap:16px;align-items:start}.uneven-grid .card:nth-child(2){margin-top:28px}.uneven-grid .card:nth-child(3){margin-top:10px}.card img{max-width:100%;max-height:220px;width:auto;height:auto;object-fit:contain;border-radius:14px;display:block;margin:0 auto 14px}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.step b{display:block;color:var(--mag);font-size:18px;margin-bottom:8px}.masonry-six{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.masonry-six .card:nth-child(2),.masonry-six .card:nth-child(5){transform:translateY(18px)}.shelf-list{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:68px 1fr auto;gap:14px;align-items:center;padding:15px 18px;background:#fff;border:1px solid var(--line);border-radius:16px}.shelf-row b{font-size:20px;color:var(--indigo)}.shelf-row span{color:var(--muted)}.rank-list{display:grid;gap:14px}.rank-item{display:grid;grid-template-columns:90px 1fr;gap:16px;align-items:start;padding:18px;background:#fff;border:1px solid var(--line);border-radius:18px}.rank-item .num{font-size:42px;font-weight:900;line-height:1}.rank-item:nth-child(5n+1) .num{color:var(--mag)}.rank-item:nth-child(5n+2) .num{color:var(--indigo)}.rank-item:nth-child(5n+3) .num{color:var(--cyan)}.rank-item:nth-child(5n+4) .num{color:var(--amber)}.rank-item:nth-child(5n) .num{color:var(--mint)}.timeline{position:relative;padding-left:34px;display:grid;gap:18px}.timeline:before{content:"";position:absolute;left:10px;top:8px;bottom:8px;width:2px;background:var(--line)}.timeline-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.timeline-item:before{content:"";position:absolute;left:-31px;top:24px;width:12px;height:12px;border-radius:50%;background:var(--mag);box-shadow:0 0 0 5px var(--paper)}.status{display:inline-flex;padding:3px 10px;border-radius:999px;background:var(--soft);color:var(--muted);font-size:13px;margin-top:6px}.page-hero{padding:22px 0 26px}.page-hero .eyebrow{color:var(--mag);font-weight:800}.content-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.content-grid.three{grid-template-columns:repeat(3,1fr)}.long-copy{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px}.long-copy h2{color:var(--ink);margin-top:0}.long-copy h3{color:var(--ink);margin-top:26px}.long-copy p{margin:0 0 16px;color:var(--text)}.editor-note{border-left:4px solid var(--mag);background:#fff;padding:16px 18px;border-radius:0 16px 16px 0;margin:18px 0;color:var(--muted)}.policy-list{display:grid;gap:16px}.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.faq-item h2{font-size:19px;margin:0 0 9px;color:var(--ink)}.faq-item p{margin:0;color:var(--muted)}.app-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;background:#fff;border:1px solid var(--line);border-radius:24px;padding:28px;align-items:center}.app-panel.no-media{grid-template-columns:1fr}.icon-line{display:flex;align-items:center;gap:12px}.icon-line img{width:60px;height:60px;object-fit:contain;border-radius:14px}.site-footer{margin-top:64px;background:var(--ink);color:#F7EFE6;padding:48px 0 88px}.footer-inner{max-width:1160px;margin:auto;padding:0 20px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:30px}.footer-brand div{display:flex;flex-direction:column}.footer-brand strong{font-size:22px}.footer-brand span{opacity:.72}.footer-logo{max-width:160px;max-height:34px;object-fit:contain}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid section{display:flex;flex-direction:column;gap:7px}.footer-grid h2{font-size:16px;margin:0 0 6px;color:#fff}.footer-grid a{opacity:.84}.footer-note{margin-top:28px;opacity:.82}.copyright{opacity:.62;font-size:14px}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.42);z-index:80;opacity:0;transition:.2s;pointer-events:none}.overlay.open{opacity:1;pointer-events:auto}.book-menu,.search-layer{position:fixed;inset:0;z-index:90;visibility:hidden;pointer-events:none;display:grid;place-items:center;padding:24px}.book-menu.open,.search-layer.open{visibility:visible;pointer-events:auto}.book-shell{width:min(840px,100%);max-height:86vh;overflow:auto;background:#fff;border-radius:24px;box-shadow:0 24px 70px rgba(26,18,48,.22)}.book-head{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:2}.book-brand{display:flex;align-items:center;gap:12px}.book-brand img{max-width:120px;max-height:32px;object-fit:contain}.book-brand div{display:flex;flex-direction:column}.book-brand span{font-size:12px;color:var(--faint)}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:24px;min-width:0}.book-page:first-child{border-right:1px solid var(--line)}.book-page h2{font-size:15px;color:var(--mag);margin:8px 0 10px}.book-page a{display:block;padding:10px 0;border-bottom:1px dashed var(--line)}.book-page a strong{display:block;color:var(--ink)}.book-page a span{display:block;color:var(--muted);font-size:14px}.search-card{width:min(560px,100%);background:#fff;border-radius:24px;padding:22px;box-shadow:0 24px 70px rgba(26,18,48,.22)}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}.search-head strong{font-size:22px;color:var(--ink)}.search-look{display:block;background:var(--soft);padding:14px;border-radius:16px;color:var(--muted)}.search-look input{width:100%;margin-top:10px;border:1px solid var(--line);background:#fff;border-radius:12px;padding:12px;color:var(--ink);outline:none}.preset-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.preset-links a{padding:8px 13px;border-radius:999px;border:1px solid var(--line);background:#fff}.layer-open{overflow:hidden}.mobile-bottom{display:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(99,102,241,.35);outline-offset:2px}@media(max-width:860px){.masthead-inner{grid-template-columns:70px 1fr 90px;padding:0 16px}.search-btn{display:none}.mast-actions{gap:0}.app-link{padding:0 12px}.chapter-bar{display:none}.site-main{padding-top:92px}.hero,.feature-split,.app-panel{grid-template-columns:1fr}.hero{gap:24px;padding-top:20px}.hero-media{order:-1}.tag-grid{grid-template-columns:repeat(2,1fr)}.uneven-grid,.content-grid,.content-grid.three{grid-template-columns:1fr 1fr}.steps{grid-template-columns:1fr 1fr}.masonry-six{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:none}.book-page{padding:18px}.mobile-bottom{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:45;grid-template-columns:repeat(5,1fr);height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:grid;place-items:center;font-size:13px;color:var(--muted)}.mobile-bottom a.active{color:var(--mag);font-weight:800}.site-footer{padding-bottom:120px}.book-menu,.search-layer{padding:14px}.book-shell{max-height:90vh}.masonry-six .card:nth-child(2),.masonry-six .card:nth-child(5){transform:none}}@media(max-width:580px){.brand-mark strong{font-size:20px}.brand-logo{max-width:150px;max-height:34px}.hero p,.page-hero p{font-size:16px}.tag-grid,.uneven-grid,.content-grid,.content-grid.three,.steps,.masonry-six,.footer-grid{grid-template-columns:1fr}.uneven-grid .card:nth-child(2),.uneven-grid .card:nth-child(3){margin-top:0}.shelf-row{grid-template-columns:50px 1fr}.shelf-row a{grid-column:2}.rank-item{grid-template-columns:64px 1fr}.rank-item .num{font-size:34px}.section{padding:34px 0}.wrap{padding:0 16px}.masthead-inner{padding:0 12px}.square-btn{width:44px}.app-link{font-size:14px}.site-main{padding-top:88px}}
