:root{--paper:#FFF8F2;--white:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--quiet:#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;overflow-x:hidden}body{margin:0;background:var(--paper);color:var(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;height:auto;max-height:520px;object-fit:contain}.masthead{position:fixed;z-index:40;top:0;left:0;right:0;height:72px;background:rgba(255,248,242,.96);border-bottom:1px solid var(--border);backdrop-filter:blur(10px)}.masthead-inner{max-width:1160px;height:100%;margin:auto;padding:0 16px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center}.brand{justify-self:center;display:flex;align-items:center;min-height:44px;font-weight:800;color:var(--ink);letter-spacing:.08em}.brand img{max-height:38px;max-width:220px}.head-actions{justify-self:end;display:flex;align-items:center;gap:10px}.icon-btn,.app-link{min-width:44px;min-height:44px;border:1px solid var(--border);background:var(--white);color:var(--ink);border-radius:999px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;font:inherit}.app-link{padding:0 18px;background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%);color:#fff;border:0;font-weight:700}.chapter-bar{position:fixed;z-index:35;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:36px}.chapter-bar a{height:46px;display:flex;align-items:center;position:relative;color:var(--muted);font-size:14px}.chapter-bar a.active{color:var(--ink);font-weight:700}.chapter-bar a.active:after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--pink);border-radius:3px}.site-main{max-width:1160px;margin:0 auto;padding:154px 16px 80px}.section{margin:0 0 34px;background:#fff;border:1px solid var(--border);border-radius:20px;padding:28px;box-shadow:var(--shadow)}.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(280px,.95fr);gap:32px;align-items:center;padding:34px}.hero.no-image{grid-template-columns:1fr}.eyebrow{margin:0 0 8px;color:var(--pink);font-weight:800;font-size:13px;letter-spacing:.12em}.vertical-mark{writing-mode:vertical-rl;letter-spacing:.16em;color:var(--pink);font-size:13px}.hero-copy-grid{display:grid;grid-template-columns:auto 1fr;gap:18px}.hero h1,.page-hero h1{margin:0 0 14px;color:var(--ink);font-size:clamp(28px,4vw,34px);line-height:1.28}.hero p,.page-hero p{margin:0;color:var(--muted)}.hero-media img{max-height:360px;margin:auto}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:22px}.btn{min-height:44px;padding:10px 18px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;font-weight:700;border:1px solid var(--border);background:#fff;color:var(--ink)}.btn.primary{border:0;color:#fff;background:linear-gradient(135deg,#6366F1 0%,#E11D8F 55%,#D97706 100%)}.tag-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.tag-card{padding:18px;border:1px solid var(--border);border-radius:18px;background:#fff}.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)}.section-head{display:flex;justify-content:space-between;gap:16px;align-items:flex-end;margin-bottom:20px}.section-head h2{margin:0;color:var(--ink);font-size:26px}.section-head p{margin:0;color:var(--muted);max-width:650px}.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.8fr);gap:28px;align-items:center}.split.no-image{grid-template-columns:1fr}.section-media img{max-height:320px;margin:auto}.chapter-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:18px}.chapter-item{padding:14px 16px;border-radius:16px;background:var(--soft);border:1px solid var(--border)}.num{font-size:28px;font-weight:900;color:var(--indigo);line-height:1}.num.pink{color:var(--pink)}.num.cyan{color:var(--cyan)}.num.amber{color:var(--amber)}.cards-3{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:16px}.feature-card{padding:20px;background:#fff;border:1px solid var(--border);border-radius:20px}.feature-card:nth-child(2){margin-top:28px}.feature-card img{max-height:210px;margin:0 auto 14px}.feature-card h3{color:var(--ink);margin:8px 0}.step-grid,.theme-grid,.info-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step,.theme-card,.info-card{padding:18px;border-radius:18px;border:1px solid var(--border);background:#fff}.theme-grid{grid-template-columns:repeat(3,1fr)}.theme-card:nth-child(2n){padding-bottom:30px}.shelf-list{display:grid;gap:10px}.shelf-row{display:grid;grid-template-columns:120px 1fr auto;gap:18px;align-items:center;padding:16px;border-bottom:1px solid var(--border)}.shelf-row strong{color:var(--ink)}.rank-list{display:grid;gap:12px}.rank-item{display:grid;grid-template-columns:70px 1fr;gap:18px;align-items:center;padding:16px;border-radius:18px;background:#fff;border:1px solid var(--border)}.rank-item .num{font-size:42px}.timeline{position:relative;padding-left:28px}.timeline:before{content:"";position:absolute;top:10px;bottom:10px;left:8px;width:2px;background:var(--border)}.time-item{position:relative;padding:0 0 24px 18px}.time-item:before{content:"";position:absolute;left:-26px;top:8px;width:12px;height:12px;background:var(--pink);border:3px solid var(--paper);border-radius:50%}.status{display:inline-flex;padding:4px 10px;border-radius:999px;background:var(--soft);font-size:13px;font-weight:700;color:var(--ink)}.page-hero{margin-bottom:28px;padding:30px;background:#fff;border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow)}.article{background:#fff;border:1px solid var(--border);border-radius:20px;padding:28px;margin-bottom:24px}.article h2,.article h3{color:var(--ink)}.article p{margin:0 0 1em}.article ul{padding-left:22px}.quote-note{padding:16px 18px;border-left:4px solid var(--pink);background:var(--soft);border-radius:0 14px 14px 0}.faq-item{padding:18px 0;border-bottom:1px solid var(--border)}.faq-item:last-child{border-bottom:0}.faq-item h2{font-size:19px;margin:0 0 8px}.site-footer{background:var(--ink);color:#F7EFE6;padding:44px max(16px,calc((100vw - 1160px)/2)) 86px}.footer-brand{display:flex;gap:14px;align-items:center;margin-bottom:28px}.footer-brand img{max-height:36px;max-width:180px}.footer-brand strong,.footer-brand span{display:block}.footer-brand span{font-size:12px;opacity:.7;letter-spacing:.12em}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}.footer-grid h2{font-size:15px;margin:0 0 10px;color:#fff}.footer-grid a{display:block;color:#F7EFE6;opacity:.86;padding:5px 0}.footer-note,.copyright{font-size:13px;opacity:.72}.footer-note{margin-top:28px;border-top:1px solid rgba(255,255,255,.12);padding-top:20px}.overlay{position:fixed;z-index:60;inset:0;background:rgba(26,18,48,.42);opacity:0;pointer-events:none;transition:.18s}.overlay.show{opacity:1;pointer-events:auto}.book-menu,.search-layer{position:fixed;z-index:70;left:50%;top:50%;transform:translate(-50%,-48%) scale(.98);width:min(840px,calc(100% - 32px));max-height:82vh;overflow:auto;background:var(--paper);border-radius:22px;box-shadow:0 28px 80px rgba(26,18,48,.28);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.book-menu.open,.search-layer.open{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}.book-head{display:flex;justify-content:space-between;align-items:center;padding:18px 20px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--paper);z-index:2}.brand-mini{display:flex;align-items:center;gap:10px}.brand-mini img{max-height:30px;max-width:150px}.brand-mini strong,.brand-mini span{display:block}.brand-mini span{font-size:11px;color:var(--muted)}.book-pages{display:grid;grid-template-columns:1fr 1fr}.book-page{padding:22px}.book-page:first-child{border-right:1px solid var(--border)}.book-page h2{font-size:15px;color:var(--pink);margin:4px 0 10px}.book-page a{display:block;padding:10px 0;border-bottom:1px solid var(--border)}.book-page a strong,.book-page a span{display:block}.book-page a span{color:var(--muted);font-size:13px}.search-layer{width:min(620px,calc(100% - 32px));padding:28px}.close-search{position:absolute;right:18px;top:18px}.search-layer h2{color:var(--ink);font-size:26px}.search-look{height:52px;border:1px solid var(--border);border-radius:999px;background:#fff;padding:0 18px;display:flex;align-items:center;justify-content:space-between;color:var(--quiet)}.preset-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.preset-links a{padding:9px 14px;border:1px solid var(--border);border-radius:999px;background:#fff}.mobile-bottom{display:none}.btn:hover,.btn:focus-visible,.icon-btn:hover,.icon-btn:focus-visible,.app-link:hover,.app-link:focus-visible,.chapter-bar a:focus-visible,.footer-grid a:focus-visible,.book-page a:focus-visible,.mobile-bottom a:focus-visible{outline:3px solid rgba(225,29,143,.22);outline-offset:2px}.muted{color:var(--muted)}.small{font-size:13px}.center{text-align:center}
@media(max-width:900px){.tag-grid,.step-grid,.info-grid{grid-template-columns:repeat(2,1fr)}.theme-grid{grid-template-columns:repeat(2,1fr)}.cards-3{grid-template-columns:1fr 1fr}.cards-3 .feature-card:last-child{grid-column:1/-1}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.chapter-bar{display:none}.site-main{padding-top:96px;padding-bottom:88px}.desktop-search{display:none}.masthead-inner{grid-template-columns:56px 1fr auto}.brand{justify-self:center}.brand img{max-width:150px}.head-actions{gap:0}.app-link{padding:0 14px}.hero,.split{grid-template-columns:1fr}.hero{padding:24px}.hero-copy-grid{grid-template-columns:1fr}.vertical-mark{writing-mode:horizontal-tb}.hero-media{order:2}.tag-grid,.theme-grid,.step-grid,.info-grid,.cards-3{grid-template-columns:1fr}.cards-3 .feature-card:last-child{grid-column:auto}.feature-card:nth-child(2){margin-top:0}.chapter-list{grid-template-columns:1fr}.section{padding:22px}.section-head{display:block}.shelf-row{grid-template-columns:1fr;gap:6px}.book-menu{width:calc(100% - 24px);max-height:86vh}.book-pages{grid-template-columns:1fr}.book-page:first-child{border-right:0;border-bottom:1px solid var(--border)}.mobile-bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;z-index:45;left:0;right:0;bottom:0;min-height:50px;padding-bottom:env(safe-area-inset-bottom);background:rgba(255,255,255,.97);border-top:1px solid var(--border)}.mobile-bottom a{min-height:50px;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(78px + env(safe-area-inset-bottom))}.search-layer{width:calc(100% - 24px)}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:420px){.tag-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.hero h1,.page-hero h1{font-size:28px}.masthead-inner{padding:0 12px}.app-link{font-size:13px}.brand{font-size:15px}.brand img{max-width:118px}}