*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#FFF8F2;color:#2C2440;font-family:"Noto Sans SC","Microsoft YaHei","PingFang SC",Arial,sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden}body.modal-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:1000;background:#1A1230;color:#fff;padding:10px 16px;border-radius:999px}.skip-link:focus{top:12px}.masthead{position:fixed;inset:0 0 auto 0;height:72px;background:#FFF8F2;border-bottom:1px solid rgba(26,18,48,.10);z-index:60}.masthead-inner{height:100%;max-width:1160px;margin:auto;padding:0 18px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.square-action,.text-action,.close-button{border:1px solid rgba(26,18,48,.14);background:#fff;color:#1A1230;min-width:44px;min-height:44px;border-radius:14px;cursor:pointer}.square-action{justify-self:start;width:44px}.brand-mark{display:flex;align-items:center;justify-content:center;min-height:44px}.brand-logo{display:block;max-height:38px;max-width:220px;width:auto}.brand-fallback{font-weight:900;letter-spacing:.15em;color:#1A1230}.masthead-actions{justify-self:end;display:flex;align-items:center;gap:8px}.text-action{padding:0 14px}.app-link{display:inline-flex;min-height:44px;align-items:center;padding:0 17px;border-radius:999px;background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;font-weight:800}.chapter-strip{position:fixed;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid rgba(26,18,48,.10);z-index:55}.chapter-inner{height:100%;max-width:860px;margin:auto;display:flex;align-items:center;justify-content:center;gap:34px}.chapter-inner a{height:46px;display:flex;align-items:center;position:relative;font-weight:700;color:#5A5270;white-space:nowrap}.chapter-inner a.active{color:#1A1230}.chapter-inner a.active:after{content:"";position:absolute;height:3px;border-radius:999px;background:#E11D8F;left:0;right:0;bottom:0}.site-main{padding-top:118px}.container{width:min(1160px,calc(100% - 32px));margin:auto}.page-hero{padding:64px 0 34px}.page-hero .eyebrow,.eyebrow{font-size:.78rem;letter-spacing:.16em;text-transform:uppercase;color:#E11D8F;font-weight:900}.page-hero h1{margin:.35rem 0 1rem;font-size:clamp(28px,4vw,34px);line-height:1.2;color:#1A1230}.page-hero p{max-width:780px;color:#5A5270}.section{padding:34px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}.section-head h2{margin:0;font-size:clamp(22px,3vw,30px);line-height:1.25;color:#1A1230}.section-head p{margin:0;max-width:640px;color:#5A5270}.paper-card{background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:20px;box-shadow:0 14px 34px rgba(26,18,48,.08)}.prose-card{padding:26px}.prose-card h2,.prose-card h3{color:#1A1230;line-height:1.35}.prose-card p{margin:.6rem 0 1rem}.grid-2,.grid-3,.grid-4{display:grid;gap:18px}.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}.cards .paper-card{padding:22px}.cards h3{margin:.2rem 0 .55rem;color:#1A1230}.cards p{margin:0;color:#5A5270}.tag-dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.magenta{background:#E11D8F}.indigo{background:#6366F1}.cyan{background:#0891B2}.amber{background:#D97706}.mint{background:#059669}.text-link{font-weight:800;color:#6366F1}.text-link:hover{text-decoration:underline}.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}.btn{display:inline-flex;min-height:44px;align-items:center;justify-content:center;padding:0 20px;border-radius:999px;font-weight:850}.btn-primary{background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff}.btn-secondary{background:#fff;border:1px solid rgba(26,18,48,.14);color:#1A1230}.cover-grid{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(300px,.92fr);gap:34px;align-items:center;padding:48px 0}.cover-copy{position:relative;padding-left:44px}.vertical-title{position:absolute;left:0;top:4px;writing-mode:vertical-rl;letter-spacing:.2em;color:#E11D8F;font-weight:900}.cover-copy h1{font-size:clamp(32px,5vw,54px);line-height:1.12;color:#1A1230;margin:0 0 18px;max-width:720px}.cover-copy p{max-width:680px;color:#5A5270}.cover-media,.media-frame{background:#F3EBE3;border-radius:22px;overflow:hidden;min-height:240px;display:flex;align-items:center;justify-content:center;border:1px solid rgba(26,18,48,.08)}.cover-media{min-height:320px}.cover-media img,.media-frame img,.card-image img,.app-visual img{width:100%;height:auto;max-height:360px;object-fit:contain;display:block}.color-tags{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.color-tag{background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:18px;padding:18px}.color-tag strong{display:block;color:#1A1230;margin-bottom:6px}.color-tag p{margin:0 0 8px;color:#5A5270;font-size:.94rem}.feature-layout{display:grid;grid-template-columns:minmax(280px,.85fr) minmax(0,1.15fr);gap:24px;align-items:start}.chapter-list{counter-reset:item;display:grid;gap:12px}.chapter-item{display:grid;grid-template-columns:54px 1fr;gap:14px;padding:16px 18px;background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:16px}.chapter-item .num{font-size:1.3rem;font-weight:900;color:#E11D8F}.chapter-item h3{margin:0;color:#1A1230}.chapter-item p{margin:4px 0 0;color:#5A5270}.uneven-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:18px;align-items:start}.feature-card{overflow:hidden}.card-image{background:#F3EBE3;min-height:170px;display:flex;align-items:center;justify-content:center}.feature-card .copy{padding:22px}.feature-card:nth-child(2){margin-top:28px}.feature-card:nth-child(3){margin-top:10px}.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.step{padding:20px;border-radius:18px;background:#fff;border:1px solid rgba(26,18,48,.10)}.step b{font-size:1.2rem;color:#6366F1}.masonry-ish{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;align-items:start}.masonry-ish article{padding:20px;background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:18px}.masonry-ish article:nth-child(2),.masonry-ish article:nth-child(5){min-height:210px}.shelf-list{display:grid;gap:10px}.shelf-row{display:grid;grid-template-columns:48px 1fr auto;gap:16px;align-items:center;padding:16px 18px;background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:14px}.shelf-row .shelf-no{font-weight:900;color:#D97706}.shelf-row small{color:#8A8298}.big-rank{display:grid;gap:12px}.rank-row{display:grid;grid-template-columns:92px 1fr;gap:16px;align-items:center;padding:18px 20px;background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:18px}.rank-no{font-size:clamp(38px,8vw,72px);font-weight:950;line-height:1;color:#E11D8F}.rank-row:nth-child(2) .rank-no{color:#6366F1}.rank-row:nth-child(3) .rank-no{color:#0891B2}.rank-row:nth-child(4) .rank-no{color:#D97706}.rank-row:nth-child(5) .rank-no{color:#059669}.timeline{position:relative;padding-left:30px;display:grid;gap:16px}.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:linear-gradient(#6366F1,#E11D8F,#D97706)}.timeline-item{position:relative;padding:20px;background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:18px}.timeline-item:before{content:"";position:absolute;width:14px;height:14px;border-radius:50%;background:#E11D8F;left:-28px;top:26px;box-shadow:0 0 0 5px #FFF8F2}.status{display:inline-flex;padding:4px 10px;border-radius:999px;background:#F3EBE3;color:#1A1230;font-size:.82rem;font-weight:800}.app-block{display:grid;grid-template-columns:.9fr 1.1fr;gap:26px;align-items:center}.app-visual{min-height:240px;border-radius:22px;background:#F3EBE3;display:flex;align-items:center;justify-content:center;overflow:hidden}.icon-row{display:flex;align-items:center;gap:14px;margin-bottom:14px}.app-icon{width:64px;height:64px;border-radius:16px;object-fit:contain;background:#fff}.faq-list{display:grid;gap:12px}.faq-item{padding:20px;background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:18px}.faq-item h2,.faq-item h3{margin:0 0 8px;color:#1A1230;font-size:1.08rem}.faq-item p{margin:0;color:#5A5270}.notice{padding:18px 20px;border-radius:18px;background:#fff;border-left:4px solid #E11D8F}.site-footer{background:#1A1230;color:#F7EFE6;margin-top:60px}.footer-inner{width:min(1160px,calc(100% - 32px));margin:auto;padding:48px 0 80px}.footer-brand{max-width:760px}.footer-logo{max-height:34px;max-width:200px;filter:brightness(0) invert(1);object-fit:contain}.footer-logo-link strong{font-size:1.4rem}.footer-en{letter-spacing:.15em;font-size:.8rem;color:#cfc6dd}.footer-columns{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin-top:32px;padding-top:28px;border-top:1px solid rgba(255,255,255,.14)}.footer-columns h2{font-size:1rem;margin:0 0 10px;color:#fff}.footer-columns a{display:block;color:#F7EFE6;opacity:.82;padding:4px 0}.copyright{margin-top:30px;color:#cfc6dd}.overlay{position:fixed;inset:0;background:rgba(26,18,48,.46);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.18s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.book-menu,.search-modal{position:fixed;inset:0;z-index:90;display:flex;align-items:center;justify-content:center;padding:20px;visibility:hidden;opacity:0;pointer-events:none;transition:.18s}.book-menu.is-open,.search-modal.is-open{visibility:visible;opacity:1;pointer-events:auto}.book-shell{width:min(840px,100%);max-height:calc(100vh - 40px);overflow:auto;background:#FFF8F2;border-radius:24px;border:1px solid rgba(26,18,48,.12);box-shadow:0 30px 90px rgba(26,18,48,.25)}.book-head,.search-head{display:flex;justify-content:space-between;align-items:center;gap:18px;padding:18px 20px;border-bottom:1px solid rgba(26,18,48,.10)}.book-brand{display:flex;align-items:center;gap:12px;font-weight:900}.book-logo{max-height:28px;max-width:140px}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:24px}.book-page:first-child{border-right:1px solid rgba(26,18,48,.10)}.book-page section+section{margin-top:24px}.book-page h2{font-size:.9rem;color:#E11D8F;letter-spacing:.12em}.book-page a{display:block;padding:10px 0;border-bottom:1px dashed rgba(26,18,48,.11)}.book-page a b{display:block;color:#1A1230}.book-page a span{display:block;color:#8A8298;font-size:.9rem}.search-card{width:min(640px,100%);background:#FFF8F2;border-radius:24px;border:1px solid rgba(26,18,48,.12);box-shadow:0 30px 90px rgba(26,18,48,.25)}.search-head h2{margin:2px 0 0;font-size:1.35rem;color:#1A1230}.search-look{margin:20px;min-height:52px;border:1px solid rgba(26,18,48,.14);background:#fff;border-radius:999px;display:flex;align-items:center;justify-content:space-between;padding:0 20px;color:#8A8298}.preset-links{display:flex;flex-wrap:wrap;gap:10px;padding:0 20px 24px}.preset-links a{background:#fff;border:1px solid rgba(26,18,48,.10);border-radius:999px;padding:8px 13px;font-weight:700}.mobile-bottom-nav{display:none}a:focus-visible,button:focus-visible{outline:3px solid #0891B2;outline-offset:3px}@media (hover:hover){a:hover{color:#E11D8F}.btn-primary:hover,.app-link:hover{color:#fff;filter:saturate(1.08) brightness(1.02)}}
@media(max-width:820px){.chapter-strip{display:none}.site-main{padding-top:72px}.masthead-inner{grid-template-columns:44px minmax(0,1fr) auto;padding:0 12px}.masthead-actions .search-trigger{display:none}.app-link{padding:0 12px;font-size:.9rem}.brand-logo{max-width:160px}.cover-grid,.feature-layout,.app-block{grid-template-columns:1fr}.cover-media{min-height:220px}.color-tags{grid-template-columns:repeat(2,minmax(0,1fr))}.grid-3,.grid-4,.steps,.masonry-ish,.uneven-grid{grid-template-columns:1fr 1fr}.feature-card:nth-child(2),.feature-card:nth-child(3){margin-top:0}.footer-columns{grid-template-columns:1fr 1fr}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid rgba(26,18,48,.10)}.site-footer{margin-bottom:calc(50px + env(safe-area-inset-bottom))}.mobile-bottom-nav{position:fixed;z-index:70;left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);display:grid;grid-template-columns:repeat(5,1fr);background:#fff;border-top:1px solid rgba(26,18,48,.12)}.mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;min-width:0;font-size:.88rem;font-weight:800}.mobile-bottom-nav a.active{color:#E11D8F}.footer-inner{padding-bottom:40px}}
@media(max-width:560px){.container{width:min(100% - 32px,1160px)}.page-hero{padding:42px 0 22px}.cover-grid{padding:30px 0}.cover-copy{padding-left:30px}.vertical-title{font-size:.82rem}.cover-copy h1{font-size:34px}.color-tags,.grid-2,.grid-3,.grid-4,.steps,.masonry-ish,.uneven-grid{grid-template-columns:1fr}.shelf-row{grid-template-columns:40px 1fr}.shelf-row small{grid-column:2}.rank-row{grid-template-columns:70px 1fr}.footer-columns{grid-template-columns:1fr 1fr;gap:18px}.book-menu,.search-modal{padding:10px}.book-shell{max-height:calc(100vh - 20px)}.book-page{padding:18px}.search-card{width:100%}.section{padding:26px 0}.prose-card{padding:20px}.cover-media{min-height:190px}}