:root{--paper:#FFF8F2;--white:#fff;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--sub:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.1);--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:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}img{display:block;max-width:100%;max-height:360px;height:auto;object-fit:contain}button{font:inherit}.locked{overflow:hidden}.masthead{position:fixed;z-index:40;top:0;left:0;right:0;height:72px;background:var(--paper);border-bottom:1px solid var(--line)}.mast-inner{max-width:1160px;height:100%;margin:auto;padding:0 16px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.brand{justify-self:center}.brand img{max-height:38px;max-width:220px}.brand strong{font-size:22px;color:var(--ink)}.icon-btn,.search-btn,.app-link{min-height:44px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--ink);padding:0 16px;cursor:pointer}.icon-btn{width:44px;padding:0;border-radius:12px;font-size:22px}.mast-actions{justify-self:end;display:flex;gap:8px;align-items:center}.app-link{display:inline-flex;align-items:center;background:linear-gradient(135deg,var(--indigo) 0%,var(--pink) 55%,var(--amber) 100%);color:#fff;border:0}.chapter-bar{position:fixed;z-index:35;top:72px;left:0;right:0;height:46px;background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:center;align-items:center;gap:28px}.chapter-bar a{height:46px;display:flex;align-items:center;position:relative;font-weight:700;color:var(--muted)}.chapter-bar a.active:after{content:"";position:absolute;height:3px;border-radius:3px;background:var(--pink);left:0;right:0;bottom:0}main{padding-top:142px;min-height:60vh}.wrap{width:min(1160px,calc(100% - 32px));margin:0 auto}.hero,.feature-split,.app-split{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}.hero{padding:44px 0 36px}.eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--pink);font-weight:800;letter-spacing:.08em}.hero h1,.page-hero h1{font-size:clamp(28px,4vw,34px);line-height:1.25;color:var(--ink);margin:12px 0 16px}.lead{font-size:17px;color:var(--muted);max-width:760px}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.btn{min-height:44px;padding:10px 18px;border-radius:999px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;font-weight:800}.btn.primary{background:linear-gradient(135deg,var(--indigo) 0%,var(--pink) 55%,var(--amber) 100%);color:#fff;border:0}.media-card{background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:22px;padding:14px}.section{padding:48px 0}.section.alt{background:#fff}.section h2{font-size:26px;color:var(--ink);margin:0 0 10px}.section-intro{color:var(--muted);max-width:780px;margin-bottom:24px}.tag-grid,.card-grid,.topic-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.tag-card,.content-card,.topic-card,.note-card,.step-card,.shelf-row,.rank-row,.faq-item,.policy-block{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:var(--shadow)}.dot{width:10px;height:10px;border-radius:50%;display:inline-block;margin-right:8px}.pink{background:var(--pink)}.indigo{background:var(--indigo)}.cyan{background:var(--cyan)}.amber{background:var(--amber)}.mint{background:var(--mint)}.content-card h3,.topic-card h3{margin:12px 0 8px;color:var(--ink)}.link-arrow{font-weight:800;color:var(--indigo)}.number-list{display:grid;gap:14px}.number-item,.rank-row{display:grid;grid-template-columns:64px 1fr;gap:16px;align-items:start}.number{font-size:34px;font-weight:900;color:var(--pink);line-height:1}.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.steps .step-card:nth-child(2){transform:translateY(14px)}.steps .step-card:nth-child(3){transform:translateY(-8px)}.shelf{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:120px 1fr auto;align-items:center;gap:18px}.shelf-row b{color:var(--ink)}.rank-list{display:grid;gap:14px}.rank-row .number{font-size:46px}.timeline{position:relative;display:grid;gap:18px;margin-left:12px}.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:var(--line)}.timeline-item{position:relative;padding-left:38px}.timeline-item:before{content:"";position:absolute;left:0;top:9px;width:20px;height:20px;border-radius:50%;background:var(--indigo);box-shadow:0 0 0 6px #fff;border:1px solid var(--line)}.status{display:inline-flex;padding:4px 10px;border-radius:999px;background:var(--soft);font-weight:800;font-size:13px;color:var(--muted)}.page-hero{padding:34px 0 18px}.page-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.article-flow{max-width:840px}.article-flow h2{margin-top:34px;color:var(--ink)}.article-flow p{margin:10px 0}.editor-view{border-left:4px solid var(--pink);padding-left:18px}.faq-list{display:grid;gap:14px}.faq-item h3{margin:0 0 8px;color:var(--ink)}.site-footer{background:var(--ink);color:#F7EFE6;margin-top:56px}.footer-inner{max-width:1160px;margin:auto;padding:48px 16px 84px}.footer-brand{display:flex;gap:14px;align-items:center;margin-bottom:30px}.footer-brand img{max-height:38px;max-width:180px}.footer-brand span{display:block;color:#cfc6dc;font-size:13px}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid h3{color:#fff}.footer-grid a{display:block;color:#e4ddeb;margin:7px 0}.footer-note{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:28px;color:#d7cede}.copyright{color:#bdb3c9}.overlay{position:fixed;z-index:60;inset:0;background:rgba(20,12,38,.45);opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.open{opacity:1;visibility:visible;pointer-events:auto}.book-menu,.search-modal{position:fixed;z-index:70;inset:0;display:flex;align-items:center;justify-content:center;padding:20px;visibility:hidden;pointer-events:none}.book-menu.open,.search-modal.open{visibility:visible;pointer-events:auto}.book-menu{max-width:840px;width:calc(100% - 40px);height:min(82vh,760px);inset:50% auto auto 50%;transform:translate(-50%,-50%);background:#fff;border-radius:22px;box-shadow:var(--shadow);display:block;overflow:auto}.menu-head{position:sticky;top:0;background:#fff;z-index:2;display:flex;justify-content:space-between;align-items:center;padding:16px 20px;border-bottom:1px solid var(--line)}.menu-brand{display:flex;gap:10px;align-items:center}.menu-brand img{max-height:30px;max-width:150px}.menu-pages{display:grid;grid-template-columns:1fr 1fr}.menu-page{padding:24px}.menu-page:first-child{border-right:1px solid var(--line)}.menu-page h2{font-size:16px;color:var(--pink);margin:4px 0 10px}.menu-page a{display:block;padding:10px 0;border-bottom:1px solid var(--line)}.menu-page b{display:block;color:var(--ink)}.menu-page span{display:block;color:var(--muted);font-size:13px}.search-card{width:min(620px,94vw);background:#fff;border-radius:22px;padding:28px;box-shadow:var(--shadow);position:relative}.close-search{position:absolute;right:18px;top:18px}.search-look{border:1px solid var(--line);border-radius:999px;min-height:50px;display:flex;align-items:center;justify-content:space-between;padding:0 18px;color:var(--sub);margin:20px 0}.preset{display:flex;gap:10px;flex-wrap:wrap}.preset a{padding:9px 14px;border-radius:999px;background:var(--soft);font-weight:700}.mobile-nav{display:none}a:focus-visible,button:focus-visible{outline:3px solid rgba(99,102,241,.35);outline-offset:3px}a:hover{color:var(--pink)}
@media(max-width:820px){.chapter-bar{display:none}.mast-actions .search-btn{display:none}.masthead{height:68px}.mast-inner{grid-template-columns:52px 1fr 90px}.brand img{max-width:150px}.app-link{padding:0 12px}.mast-actions{display:block}.hero,.feature-split,.app-split{grid-template-columns:1fr}.hero{padding-top:22px}.tag-grid{grid-template-columns:repeat(2,1fr)}.card-grid,.topic-grid,.page-grid{grid-template-columns:1fr}.steps{grid-template-columns:1fr 1fr}.steps .step-card{transform:none!important}.shelf-row{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.menu-pages{grid-template-columns:1fr}.menu-page:first-child{border-right:0}.mobile-nav{position:fixed;z-index:50;left:0;right:0;bottom:0;display:grid;grid-template-columns:repeat(5,1fr);min-height:50px;padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-nav a{display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}.footer-inner{padding-bottom:110px}main{padding-top:88px}.book-menu{width:calc(100% - 28px);height:86vh}.number-item,.rank-row{grid-template-columns:50px 1fr}}@media(max-width:480px){.tag-grid,.steps,.footer-grid{grid-template-columns:1fr}.mast-inner{padding:0 12px}.wrap{width:min(1160px,calc(100% - 32px))}.section{padding:38px 0}.hero h1,.page-hero h1{font-size:29px}.footer-grid{gap:8px}.menu-page{padding:18px}.search-card{padding:24px 18px}}

.mobile-nav a.active{color:var(--pink)}