*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#FFF8F2;color:#2C2440;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}button,input{font:inherit}.locked{overflow:hidden}.masthead{position:fixed;z-index:50;top:0;left:0;right:0;height:72px;background:#FFF8F2;border-bottom:1px solid rgba(26,18,48,.10)}.masthead-inner{max-width:1160px;height:100%;margin:auto;padding:0 20px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.square-btn{width:44px;height:44px;border:1px solid rgba(26,18,48,.14);border-radius:12px;background:#fff;color:#1A1230;cursor:pointer}.brand{justify-self:center;font-weight:800;color:#1A1230}.brand img{max-height:38px;width:auto}.mast-actions{justify-self:end;display:flex;align-items:center;gap:10px}.text-btn,.app-link{min-height:44px;display:inline-flex;align-items:center;padding:0 16px;border-radius:999px;border:1px solid rgba(26,18,48,.14);background:#fff;color:#1A1230}.text-btn{cursor:pointer}.app-link,.primary{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;border:0}.chapter-strip{position:fixed;z-index:45;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid rgba(26,18,48,.10);display:flex;align-items:center;justify-content:center;gap:34px}.chapter-strip a{height:46px;display:flex;align-items:center;position:relative}.chapter-strip a.active:after{content:"";position:absolute;height:3px;left:0;right:0;bottom:0;background:#E11D8F;border-radius:3px}.site-main{padding-top:118px}.wrap{max-width:1160px;margin:auto;padding:40px 20px}.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}.hero.one{grid-template-columns:1fr}.eyebrow{font-size:14px;letter-spacing:.22em;color:#E11D8F;font-weight:800}.hero h1,.page-hero h1{margin:.25em 0 .45em;color:#1A1230;font-size:clamp(28px,4vw,34px);line-height:1.28}.hero p,.lead{font-size:17px;color:#5A5270}.hero-media img{max-height:360px;margin:auto}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}.btn{min-height:44px;display:inline-flex;align-items:center;padding:0 20px;border-radius:999px;border:1px solid rgba(26,18,48,.14);background:#fff;font-weight:700}.section{padding:20px 0 46px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:20px}.section h2{margin:0;color:#1A1230;font-size:26px}.section .kicker{color:#8A8298;font-size:14px}.tag-grid,.card-grid,.mini-grid{display:grid;gap:16px}.tag-grid{grid-template-columns:repeat(4,1fr)}.card-grid{grid-template-columns:repeat(3,1fr)}.mini-grid{grid-template-columns:repeat(2,1fr)}.tag,.card,.panel,.article-card{background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:18px;box-shadow:0 14px 34px rgba(26,18,48,.08);padding:22px}.tag i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:8px}.tag:nth-child(4n+1) i{background:#E11D8F}.tag:nth-child(4n+2) i{background:#6366F1}.tag:nth-child(4n+3) i{background:#0891B2}.tag:nth-child(4n+4) i{background:#D97706}.tag h3,.card h3,.panel h3{margin:.25em 0;color:#1A1230}.tag a,.text-link{color:#6366F1;font-weight:700}.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);gap:30px;align-items:center}.split img{max-height:340px;margin:auto}.chapter-list{counter-reset:item;display:grid;gap:14px}.chapter-item{background:#fff;border-radius:16px;border:1px solid rgba(26,18,48,.1);padding:18px;display:grid;grid-template-columns:56px 1fr;gap:12px}.num{font-size:28px;font-weight:900;color:#E11D8F}.steps,.timeline,.shelf-list,.rank-list{display:grid;gap:14px}.step,.timeline-item,.shelf-row,.rank-row{background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:16px;padding:20px}.timeline-item{position:relative;padding-left:34px}.timeline-item:before{content:"";position:absolute;left:14px;top:28px;width:10px;height:10px;border-radius:50%;background:#059669}.timeline-item:after{content:"";position:absolute;left:18px;top:38px;bottom:-18px;width:2px;background:#F3EBE3}.timeline-item:last-child:after{display:none}.rank-row{display:grid;grid-template-columns:72px 1fr;gap:14px}.rank-row .rank{font-size:36px;font-weight:900;color:#6366F1}.page-hero{padding:28px 0 10px}.page-hero .inner{background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:22px;padding:32px}.prose{max-width:860px}.prose p{margin:0 0 1em}.prose h2{margin:1.6em 0 .5em;color:#1A1230}.notice{padding:18px 20px;background:#F3EBE3;border-radius:16px}.qa{display:grid;gap:14px}.qa article{background:#fff;border:1px solid rgba(26,18,48,.1);border-radius:16px;padding:20px}.qa h2{font-size:19px;margin:0 0 8px}.site-footer{background:#1A1230;color:#F7EFE6;margin-top:40px}.footer-inner{max-width:1160px;margin:auto;padding:48px 20px 90px}.footer-brand img{max-height:34px;width:auto;margin-bottom:12px}.footer-brand strong{display:block;font-size:24px}.footer-brand span{color:#cfc6dc}.footer-brand p{max-width:680px;color:#ded7e7}.footer-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:28px}.footer-groups h3{margin:0 0 8px}.footer-groups a{display:block;color:#e9e3ef;padding:4px 0}.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:28px;padding-top:18px;color:#cfc6dc}.overlay{position:fixed;z-index:70;inset:0;background:rgba(26,18,48,.45);opacity:0;pointer-events:none;transition:.18s}.overlay.show{opacity:1;pointer-events:auto}.book-menu,.search-card{position:fixed;z-index:80;left:50%;top:50%;transform:translate(-50%,-48%) scale(.98);visibility:hidden;pointer-events:none;opacity:0;transition:.18s;background:#FFF8F2;border-radius:22px;box-shadow:0 28px 70px rgba(26,18,48,.24)}.book-menu.show,.search-card.show{visibility:visible;pointer-events:auto;opacity:1;transform:translate(-50%,-50%) scale(1)}.book-menu{width:min(840px,calc(100vw - 32px));max-height:86vh;overflow:auto}.book-head,.search-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid rgba(26,18,48,.1)}.book-brand{display:flex;align-items:center;gap:10px;font-weight:800}.book-brand img{max-height:30px;width:auto}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:22px}.book-page:first-child{border-right:1px solid rgba(26,18,48,.1)}.book-page h3{margin:0 0 10px;color:#1A1230}.book-page a{display:block;padding:12px;border-radius:12px}.book-page a:hover,.book-page a:focus-visible{background:#fff}.book-page b,.book-page span{display:block}.book-page span{font-size:13px;color:#5A5270}.search-card{width:min(560px,calc(100vw - 32px));padding-bottom:22px}.search-box{display:block;margin:20px}.search-box span{display:block;margin-bottom:8px;color:#5A5270}.search-box input{width:100%;min-height:48px;border:1px solid rgba(26,18,48,.16);border-radius:14px;background:#fff;padding:0 14px;color:#1A1230}.preset-links{display:flex;flex-wrap:wrap;gap:10px;padding:0 20px}.preset-links a{padding:9px 13px;border-radius:999px;background:#fff;border:1px solid rgba(26,18,48,.1)}.mobile-nav{display:none}.muted{color:#8A8298}.media-block img{max-height:360px;margin:0 auto 20px}.list-clean{padding-left:1.2em}.list-clean li{margin:.5em 0}:focus-visible{outline:3px solid rgba(99,102,241,.35);outline-offset:3px}
@media(max-width:820px){.chapter-strip{display:none}.site-main{padding-top:72px}.masthead-inner{padding:0 16px}.search-only{display:none}.app-link{padding:0 12px}.hero,.split{grid-template-columns:1fr}.hero-media{order:2}.tag-grid{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:1fr}.mini-grid{grid-template-columns:1fr}.footer-groups{grid-template-columns:repeat(2,1fr)}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid rgba(26,18,48,.1)}.mobile-nav{position:fixed;z-index:40;left:0;right:0;bottom:0;display:grid;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 rgba(26,18,48,.1)}.mobile-nav a{display:flex;align-items:center;justify-content:center;font-size:13px;min-width:0}.footer-inner{padding-bottom:110px}}
@media(max-width:520px){.wrap{padding:28px 16px}.masthead-inner{grid-template-columns:44px 1fr 84px;gap:8px}.brand{max-width:150px}.brand img{max-width:100%;max-height:32px}.mast-actions{gap:0}.app-link{font-size:13px}.tag-grid,.footer-groups{grid-template-columns:1fr}.hero h1,.page-hero h1{font-size:28px}.rank-row{grid-template-columns:56px 1fr}.rank-row .rank{font-size:30px}.book-menu{max-height:88vh}}