:root{--bg:#fff;--layer:#F5F7FA;--soft:#EEF1F6;--ink:#0A1628;--text:#1E2A3A;--muted:#4A5568;--subtle:#718096;--blue:#0033A0;--bright:#0052CC;--deep:#002066;--border:rgba(0,51,160,.14);--shadow:0 12px 36px rgba(0,33,102,.08);--radius:14px;--max:1220px;--top:118px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;overflow-x:hidden}body.panel-open{overflow:hidden}a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid rgba(0,82,204,.28);outline-offset:2px}img{max-width:100%;display:block}.wrap{width:min(var(--max),calc(100% - 32px));margin-left:auto;margin-right:auto}.site-header{position:fixed;inset:0 0 auto 0;z-index:70}.spine{height:18px;background:var(--deep);color:#fff;font-size:11px;line-height:18px}.spine-inner{display:flex;justify-content:space-between;align-items:center;height:18px}.text-button{border:0;background:transparent;color:#fff;min-height:18px;padding:0 6px;cursor:pointer;font:inherit}.coverbar{height:60px;background:#fff;border-bottom:1px solid var(--border)}.coverbar-inner{height:60px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:14px}.brand{justify-self:start;display:flex;align-items:center;min-width:74px;min-height:44px}.brand img{height:34px;width:auto;max-width:180px;object-fit:contain}.brand strong{font-size:25px;color:var(--deep);letter-spacing:.02em}.catalog-toggle{justify-self:center;min-height:44px;padding:0 20px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--deep);font-weight:700;cursor:pointer}.app-link{justify-self:end;display:flex;align-items:center;min-height:44px;padding:0 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a,.text-link{font-weight:800}.site-footer{background:var(--ink);color:#A0AEC0;padding:34px 0 calc(24px + env(safe-area-inset-bottom))}.footer-brand{display:flex;justify-content:space-between;gap:28px;align-items:flex-start;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.1)}.footer-brand p{max-width:680px;margin:0}.footer-logo{display:flex;gap:12px;align-items:center;color:#fff}.footer-logo img{height:32px;width:auto;max-width:170px;object-fit:contain}.footer-logo div{display:flex;gap:8px;align-items:baseline}.footer-logo strong{font-size:23px}.footer-logo span{color:#A0AEC0}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:26px 0}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 9px}.footer-grid a{display:block;color:#A0AEC0;padding:3px 0}.footer-grid a:hover{color:#fff}.copyright{font-size:13px;color:#718096}.overlay{position:fixed;inset:0;background:rgba(10,22,40,.42);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.overlay.is-open{opacity:1;visibility:visible;pointer-events:auto}.catalog-panel,.search-panel{position:fixed;left:0;right:0;top:78px;z-index:90;visibility:hidden;pointer-events:none;opacity:0;transform:translateY(-10px);transition:.2s}.catalog-panel.is-open,.search-panel.is-open{visibility:visible;pointer-events:auto;opacity:1;transform:none}.catalog-inner{max-height:50vh;overflow:auto;background:#fff;border:1px solid var(--border);border-top:0;box-shadow:var(--shadow);padding:18px 20px 24px}.catalog-head,.search-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);padding-bottom:12px}.catalog-head button,.search-head button{min-height:44px;padding:0 14px;border:1px solid var(--border);border-radius:10px;background:#fff;color:var(--deep);cursor:pointer}.catalog-brand{display:flex;align-items:center;gap:10px}.catalog-brand img{height:30px;width:auto;max-width:160px;object-fit:contain}.catalog-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:16px}.catalog-grid h2{font-size:15px;color:var(--deep);margin:0 0 8px}.catalog-grid a{display:block;border-top:1px solid var(--border);padding:9px 0}.catalog-grid strong,.catalog-grid span{display:block}.catalog-grid strong{color:var(--ink);font-size:14px}.catalog-grid span{color:var(--muted);font-size:12px;line-height:1.55;margin-top:2px}.search-card{background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);padding:18px 20px 22px}.search-card label{display:block;margin:16px 0 6px;color:var(--muted)}.search-card input{width:100%;height:48px;border:1px solid var(--border);border-radius:10px;padding:0 14px;font:inherit;color:var(--ink)}.preset-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.preset-links a{padding:8px 12px;border:1px solid var(--border);border-radius:9px;background:var(--layer)}.mobile-bottom{display:none}.home-cover{padding-bottom:42px}.cover-image{background:var(--layer);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:22px;display:flex;align-items:center;justify-content:center;overflow:hidden}.slot-wide{width:100%;max-height:300px;aspect-ratio:16/9}.banner-img{width:100%;height:100%;max-height:300px;object-fit:contain;object-position:center}.fallback-title{font-size:52px;font-weight:900;color:var(--deep);letter-spacing:.08em}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:10px;font-weight:800}.btn.primary{background:linear-gradient(135deg,var(--bright),var(--blue) 50%,var(--deep));color:#fff}.btn.secondary{background:#fff;color:var(--blue);border:1px solid var(--blue)}.btn:hover{text-decoration:none}.section-heading{margin-bottom:16px}.section-heading span{font-size:12px;font-weight:800;color:var(--blue);letter-spacing:.08em}.section-heading h2{margin:4px 0 0;color:var(--ink);font-size:clamp(22px,3vw,28px);line-height:1.35}.page-card-section,.feature{padding:36px 0}.page-card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.page-card-grid a{min-height:126px;padding:20px;border-radius:12px;border:1px solid var(--border);background:#fff;box-shadow:var(--shadow)}.page-card-grid a:nth-child(2n){border-top:4px solid var(--deep)}.page-card-grid a:nth-child(2n+1){border-top:4px solid var(--bright)}.page-card-grid b,.page-card-grid span{display:block}.page-card-grid b{color:var(--ink);margin-bottom:7px}.page-card-grid span{color:var(--muted);line-height:1.65}.split-clean{display:grid;grid-template-columns:minmax(280px,.9fr) minmax(0,1.1fr);gap:34px;align-items:center}.split-clean.reverse .feature-media{order:2}.feature-media{background:var(--layer);border-radius:var(--radius);border:1px solid var(--border);overflow:hidden}.feature-media .media-img{height:240px}.feature-media.narrow{margin-bottom:18px}.number-list{list-style:none;padding:0;margin:18px 0 0}.number-list li{display:flex;gap:18px;justify-content:space-between;border-top:1px solid var(--border);padding:11px 0}.number-list b{color:var(--deep)}.quad-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:30px 0}.quad-grid article{border:1px solid var(--border);border-radius:var(--radius);padding:16px;box-shadow:var(--shadow)}.quad-grid img{height:190px;width:100%;object-fit:contain;background:var(--layer);border-radius:10px}.quad-grid h2{margin:14px 0 8px;color:var(--ink);font-size:20px}.quad-grid p{font-size:14px;color:var(--muted);line-height:1.7}.quad-grid a{font-weight:800}.six-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.six-grid a{min-height:72px;display:flex;align-items:center;justify-content:center;border-radius:12px;border:1px solid var(--border);font-weight:800;background:#fff}.six-grid a:nth-child(odd){background:var(--bright);color:#fff}.six-grid a:nth-child(even){background:var(--deep);color:#fff}.shelf-list{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.shelf-list a{padding:18px;border:1px solid var(--border);border-left:5px solid var(--blue);border-radius:10px}.shelf-list b,.shelf-list span{display:block}.shelf-list b{color:var(--ink)}.shelf-list span{color:var(--muted);margin-top:6px}.board-home>img,.feature>img{max-height:240px;width:100%;object-fit:contain;background:var(--layer);border-radius:var(--radius);padding:8px}.big-number-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-top:16px}.big-number-grid a{padding:18px;border:1px solid var(--border);border-radius:12px}.big-number-grid b{display:block;font-size:36px;line-height:1;color:var(--blue)}.big-number-grid span{display:block;color:var(--ink);font-weight:800;margin-top:8px}.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:16px}.status-grid a{padding:18px;background:var(--layer);border-radius:12px;border:1px solid var(--border)}.status-grid b,.status-grid span{display:block}.status-grid b{color:var(--deep)}.status-grid span{margin-top:6px;color:var(--muted)}blockquote{margin:14px 0;padding:16px 18px;border-left:4px solid var(--blue);background:var(--layer);color:var(--text)}.app-home{display:grid;grid-template-columns:minmax(220px,.72fr) minmax(0,1.28fr);gap:36px;align-items:center;padding:42px 0}.app-art{background:var(--layer);border-radius:var(--radius);border:1px solid var(--border);padding:12px;text-align:center}.app-shot{width:100%;height:420px;object-fit:contain}.icon-line{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--deep)}.app-icon{width:58px;height:58px;object-fit:contain}.app-home h2{color:var(--ink);font-size:28px;line-height:1.35;margin:14px 0}.info-tail{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;padding:20px 0 54px}.info-tail article{padding:22px;border:1px solid var(--border);border-radius:var(--radius);background:var(--layer)}.info-tail h2{margin:0 0 10px;color:var(--ink);font-size:20px}.faq-list{display:grid;gap:14px;padding-bottom:50px}.faq-item{box-shadow:none;background:var(--layer)}
@media(max-width:900px){.catalog-grid{grid-template-columns:repeat(2,1fr)}.prose-grid{grid-template-columns:1fr}.quad-grid{grid-template-columns:repeat(2,1fr)}.split-clean,.app-home{grid-template-columns:1fr}.split-clean.reverse .feature-media{order:0}.big-number-grid{grid-template-columns:repeat(3,1fr)}.status-grid{grid-template-columns:repeat(2,1fr)}.info-tail{grid-template-columns:1fr}.page-card-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){:root{--top:78px}.tabs{display:none}.site-main{padding-top:calc(var(--top) + 22px);padding-bottom:64px}.spine{height:18px}.coverbar,.coverbar-inner{height:60px}.coverbar-inner{grid-template-columns:minmax(78px,1fr) auto minmax(70px,1fr);gap:6px}.brand img{height:30px;max-width:108px}.catalog-toggle{padding:0 12px}.app-link{padding:0 10px;font-size:14px}.catalog-panel,.search-panel{top:78px}.catalog-inner{width:100%;max-height:66vh;border-left:0;border-right:0}.catalog-grid{grid-template-columns:1fr 1fr;gap:12px}.catalog-grid span{font-size:11px}.search-card{width:calc(100% - 16px);background:var(--soft)}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--border);z-index:60}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;color:var(--text);font-size:13px;font-weight:700}.mobile-bottom a.is-active{background:var(--blue);color:#fff}.site-footer{padding-bottom:calc(72px + env(safe-area-inset-bottom))}.footer-brand{display:block}.footer-logo{margin-bottom:14px}.footer-grid{grid-template-columns:repeat(2,1fr)}.page-card-grid,.quad-grid,.six-grid,.shelf-list,.big-number-grid,.status-grid{grid-template-columns:1fr}.quad-grid img{height:200px}.media-img,.feature-media .media-img{height:210px}.app-shot{height:360px}.home-cover{padding-top:6px}.slot-wide{aspect-ratio:3/2}.page-card-section,.feature{padding:28px 0}.number-list li{display:block}.number-list a{display:block;margin-top:4px}.content-block,.reading-next,.faq-item{padding:19px}}