:root{--paper:#FFF8F2;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--soft:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08);--radius:18px;--max:1160px}*{box-sizing:border-box}html{scroll-behavior:smooth}html.locked,html.locked body{overflow:hidden}body{margin:0;background:var(--paper);color:var(--text);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.78;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto}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:50}.masthead-inner{max-width:var(--max);height:100%;margin:auto;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.square-btn,.search-btn{border:1px solid var(--line);background:#fff;color:var(--ink);min-width:44px;min-height:44px;border-radius:12px;cursor:pointer}.square-btn{width:44px;padding:10px}.square-btn span{display:block;height:2px;background:var(--ink);margin:5px 0;border-radius:2px}.brand-link{justify-self:center;display:flex;align-items:center;min-height:44px}.brand-logo{max-height:38px;width:auto;max-width:220px;object-fit:contain}.brand-text{font-size:23px;color:var(--ink);letter-spacing:.08em}.mast-actions{justify-self:end;display:flex;gap:10px;align-items:center}.search-btn{padding:0 14px}.app-link,.btn-primary,.btn-secondary{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:999px;padding:0 20px;font-weight:700}.app-link,.btn-primary{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff}.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.chapter-band{position:fixed;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid var(--line);z-index:45}.chapter-inner{max-width:var(--max);height:100%;margin:auto;display:flex;justify-content:center;gap:42px}.chapter-inner a{display:flex;align-items:center;position:relative;font-weight:700;color:var(--muted)}.chapter-inner a.active,.chapter-inner a:hover{color:var(--ink)}.chapter-inner a.active:after{content:"";position:absolute;height:3px;left:0;right:0;bottom:0;background:var(--pink);border-radius:3px}main{padding-top:118px}.wrap{width:min(var(--max),calc(100% - 40px));margin:0 auto}.page-hero{padding:54px 0 28px}.eyebrow{font-size:13px;letter-spacing:.18em;color:var(--pink);font-weight:800;text-transform:uppercase}.page-hero h1,.cover-copy h1{font-size:clamp(28px,4vw,34px);line-height:1.25;margin:10px 0 18px;color:var(--ink)}.lead{font-size:17px;max-width:760px;color:var(--muted)}.section{padding:38px 0}.section-title{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:20px}.section-title h2{margin:0;color:var(--ink);font-size:24px}.section-title p{margin:0;color:var(--soft)}.cover{display:grid;grid-template-columns:1.02fr .98fr;gap:36px;align-items:center;padding:46px 0}.cover-kicker{writing-mode:vertical-rl;letter-spacing:.2em;color:var(--pink);font-weight:800;float:left;margin-right:18px}.cover-copy p{font-size:17px;color:var(--muted)}.cover-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.cover-art{background:#fff;border:1px solid var(--line);border-radius:22px;padding:16px;box-shadow:var(--shadow)}.cover-art img{width:100%;max-height:360px;object-fit:contain;border-radius:14px}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.tag-card,.card,.paper-card,.number-card,.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.tag-card{padding:18px;min-height:150px}.dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.dot.pink{background:var(--pink)}.dot.indigo{background:var(--indigo)}.dot.cyan{background:var(--cyan)}.dot.amber{background:var(--amber)}.tag-card h3{margin:8px 0;color:var(--ink)}.tag-card p{margin:0 0 10px;color:var(--muted);font-size:14px}.text-link{font-weight:800;color:var(--indigo)}.feature{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;align-items:center}.feature.reverse{grid-template-columns:1.1fr .9fr}.feature-img{background:#fff;border:1px solid var(--line);padding:14px;border-radius:20px}.feature-img img{width:100%;max-height:330px;object-fit:contain;border-radius:12px}.feature-copy{background:#fff;border-radius:20px;padding:28px;border:1px solid var(--line)}.chapter-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px}.chapter-list a{padding:14px;background:var(--paper);border-radius:14px;border:1px solid var(--line)}.chapter-list b{color:var(--pink);margin-right:8px}.masonry3{columns:3 250px;column-gap:16px}.masonry3 .card{break-inside:avoid;margin:0 0 16px;padding:20px}.card img{width:100%;max-height:260px;object-fit:contain;border-radius:14px;margin-bottom:14px}.card h3,.paper-card h3{color:var(--ink);margin:0 0 8px}.card p,.paper-card p{color:var(--muted)}.step-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px}.step b{font-size:28px;color:var(--indigo)}.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.theme-grid .paper-card{padding:20px}.theme-grid .paper-card:nth-child(2n){min-height:210px}.theme-grid .paper-card:nth-child(3n){min-height:170px}.shelf{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:110px 1fr auto;gap:18px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.shelf-row .label{font-weight:800;color:var(--pink)}.number-list{display:grid;gap:14px}.number-card{display:grid;grid-template-columns:90px 1fr;gap:16px;padding:20px;align-items:start}.big-no{font-size:42px;font-weight:900;line-height:1;background:linear-gradient(135deg,var(--indigo),var(--pink),var(--amber));-webkit-background-clip:text;color:transparent}.timeline{position:relative;margin-left:10px;padding-left:34px}.timeline:before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--pink),var(--indigo),var(--cyan),var(--mint))}.node{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;margin:0 0 18px}.node:before{content:"";position:absolute;left:-34px;top:25px;width:14px;height:14px;border-radius:50%;background:var(--pink);box-shadow:0 0 0 6px var(--paper)}.status{display:inline-flex;border-radius:999px;padding:5px 10px;background:#F3EBE3;font-size:13px;font-weight:800;color:var(--ink)}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:28px}.article-body{background:#fff;border:1px solid var(--line);border-radius:20px;padding:28px}.article-body h2{color:var(--ink);margin-top:30px}.article-body p{margin:0 0 16px}.aside-index{position:sticky;top:142px;align-self:start;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}.aside-index a,.aside-index .aside-label{display:block;padding:9px 0;color:var(--muted);border-bottom:1px solid var(--line)}.app-panel{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px}.app-visual{display:flex;gap:14px;align-items:center;justify-content:center}.app-visual img:first-child{max-height:320px;object-fit:contain}.app-visual .icon{width:92px;height:92px;object-fit:contain;border-radius:22px}.faq-list{display:grid;gap:14px}.faq-item{padding:20px}.faq-item h2,.faq-item h3{font-size:18px;margin:0 0 8px;color:var(--ink)}.faq-item p{margin:0;color:var(--muted)}.notice{border-left:4px solid var(--amber);background:#fff;border-radius:0 16px 16px 0;padding:18px 20px}.site-footer{background:#1A1230;color:#F7EFE6;margin-top:64px;padding:44px 0 84px}.footer-inner{width:min(var(--max),calc(100% - 40px));margin:auto}.footer-brand{display:flex;gap:14px;align-items:center;margin-bottom:28px}.footer-logo{max-height:38px;width:auto;filter:brightness(0) invert(1)}.footer-brand strong{display:block;font-size:20px}.footer-brand span{display:block;font-size:12px;opacity:.72}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid h2{font-size:15px;margin:0 0 12px}.footer-grid a{display:block;padding:4px 0;color:#F7EFE6;opacity:.82}.footer-grid a:hover{opacity:1}.footer-note{border-top:1px solid rgba(255,255,255,.14);padding-top:22px;margin-top:28px;opacity:.8}.copyright{opacity:.58;font-size:13px}.overlay,.book-menu,.search-layer{visibility:hidden;pointer-events:none;opacity:0;transition:.2s ease}.overlay.show,.book-menu.show,.search-layer.show{visibility:visible;pointer-events:auto;opacity:1}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.62);z-index:80}.book-menu,.search-layer{position:fixed;inset:0;z-index:90;display:grid;place-items:center;padding:20px}.book-shell{width:min(840px,100%);max-height:min(86vh,760px);overflow:auto;background:#FFF8F2;border-radius:22px;box-shadow:0 30px 80px rgba(0,0,0,.24)}.book-head,.search-head{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;border-bottom:1px solid var(--line);background:#fff}.book-brand{display:flex;gap:10px;align-items:center}.book-brand img{max-height:32px;max-width:150px}.book-brand small{display:block;color:var(--soft)}.close-btn{min-width:44px;min-height:44px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);cursor:pointer}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:22px}.book-page:first-child{border-right:1px solid var(--line)}.book-page h2{font-size:16px;color:var(--pink);margin:0 0 8px}.book-page section+section{margin-top:20px}.book-page a{display:block;padding:10px 0;border-bottom:1px dashed var(--line)}.book-page b{display:block;color:var(--ink)}.book-page span{display:block;color:var(--muted);font-size:13px}.search-card{width:min(620px,100%);background:#FFF8F2;border-radius:22px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.24)}.search-look{display:block;padding:24px}.search-look span{display:block;color:var(--muted);margin-bottom:10px}.search-look input{width:100%;min-height:50px;border:1px solid var(--line);border-radius:14px;padding:0 14px;background:#fff;color:var(--ink);outline:none}.search-look input:focus{border-color:var(--indigo);box-shadow:0 0 0 3px rgba(99,102,241,.12)}.preset-links{display:flex;flex-wrap:wrap;gap:10px;padding:0 24px 24px}.preset-links a{background:#fff;border:1px solid var(--line);border-radius:999px;padding:9px 14px}.mobile-bottom{display:none}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(99,102,241,.38);outline-offset:3px}@media(max-width:820px){.chapter-band{display:none}main{padding-top:72px}.masthead-inner{padding:0 16px;grid-template-columns:48px minmax(0,1fr) auto}.search-btn{display:none}.app-link{padding:0 13px}.brand-logo{max-width:150px}.cover,.feature,.feature.reverse,.app-panel,.article-layout{grid-template-columns:1fr}.cover{gap:18px}.cover-kicker{writing-mode:horizontal-tb;float:none;margin:0 0 8px}.cover-art{order:2}.tag-grid{grid-template-columns:repeat(2,1fr)}.step-grid{grid-template-columns:repeat(2,1fr)}.theme-grid{grid-template-columns:repeat(2,1fr)}.article-layout .aside-index{position:static;order:-1}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid var(--line)}.footer-grid{grid-template-columns:repeat(2,1fr)}.mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:60;background:#fff;border-top:1px solid var(--line);height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--muted)}.mobile-bottom a.active{color:var(--pink);font-weight:800}.site-footer{padding-bottom:calc(76px + env(safe-area-inset-bottom))}.book-menu.show~.mobile-bottom,.search-layer.show~.mobile-bottom{z-index:60}.shelf-row{grid-template-columns:1fr}.shelf-row a{justify-self:start}}@media(max-width:520px){.wrap,.footer-inner{width:min(100% - 32px,var(--max))}.mast-actions{gap:0}.app-link{font-size:13px;min-height:44px}.cover,.section{padding-top:28px;padding-bottom:28px}.tag-grid,.step-grid,.theme-grid{grid-template-columns:1fr}.masonry3{columns:1}.chapter-list{grid-template-columns:1fr}.number-card{grid-template-columns:64px 1fr}.big-no{font-size:34px}.footer-grid{grid-template-columns:1fr 1fr;gap:18px}.book-menu,.search-layer{padding:12px}.book-shell{max-height:92vh}.page-hero{padding-top:36px}.article-body{padding:20px}}