:root{
  --bg:#FFFFFF;--deep-bg:#F5F7FA;--content:#FFFFFF;--sub-bg:#EEF1F6;
  --title:#0A1628;--text:#1E2A3A;--muted:#4A5568;--soft:#718096;
  --brand:#0033A0;--bright:#0052CC;--deep:#002066;
  --border:rgba(0,51,160,.14);--shadow:0 12px 36px rgba(0,33,102,.08);
  --radius:14px;--shell:1220px;--header-h:118px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;font-size:16px;line-height:1.75;overflow-x:hidden}
body.panel-open{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input{font:inherit}
button{cursor:pointer}
img{max-width:100%;display:block}
.shell{width:min(calc(100% - 32px),var(--shell));margin-inline:auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:fixed;left:16px;top:-60px;z-index:1000;background:var(--deep);color:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:8px}
.site-header{position:fixed;inset:0 0 auto 0;z-index:800;background:#fff}
.spine-line{height:18px;background:var(--deep);color:#fff;font-size:12px}
.spine-inner{height:100%;display:flex;align-items:center;justify-content:space-between}
.spine-brand{font-weight:700;letter-spacing:.03em}
.plain-button{border:0;background:transparent;color:inherit;padding:0;min-height:18px}
.search-trigger{font-weight:700}
.bookbar{height:60px;background:#fff;border-bottom:1px solid var(--border)}
.bookbar-inner{height:100%;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:16px}
.brand-lockup{justify-self:start;display:inline-flex;align-items:center;min-height:44px}
.site-logo{height:36px;width:auto;max-width:154px;object-fit:contain}
.logo-text{font-size:26px;line-height:1;font-weight:900;color:var(--deep);letter-spacing:-.04em}
.catalog-trigger{justify-self:center;min-height:44px;padding:0 16px;border:1px solid var(--border);background:#fff;color:var(--deep);border-radius:10px;font-weight:800}
.app-link{justify-self:end;display:inline-flex;align-items:center;min-height:44px;padding:0 16px;border-radius:10px;color:#fff;font-weight:800;background:linear-gradient(135deg,#0052CC 0%,#0033A0 50%,#002066 100%)}
.tabbar{height:40px;background:var(--deep-bg);border-bottom:1px solid var(--border)}
.tabbar-inner{height:100%;display:flex;align-items:center;justify-content:flex-start;gap:4px}
.tab-link{display:inline-flex;align-items:center;height:30px;padding:0 12px;border-radius:7px;color:var(--muted);font-size:14px;font-weight:700}
.tab-link:hover,.tab-link:focus-visible{color:var(--brand);background:#fff;outline:2px solid rgba(0,82,204,.12);outline-offset:1px}
.tab-link.is-current{background:var(--brand);color:#fff}
.site-main{padding-top:var(--header-h);min-height:70vh}
.overlay{position:fixed;inset:78px 0 0;z-index:810;background:rgba(10,22,40,.32);opacity:0;pointer-events:none;transition:opacity .2s ease}
.overlay.is-active{opacity:1;pointer-events:auto}
.catalog-panel,.search-panel{position:fixed;top:78px;left:50%;z-index:820;transform:translate(-50%,-12px);width:min(calc(100% - 32px),var(--shell));max-height:50vh;overflow:auto;background:#fff;border:1px solid var(--border);border-top:0;border-radius:0 0 14px 14px;box-shadow:var(--shadow);visibility:hidden;opacity:0;pointer-events:none;transition:opacity .18s ease,transform .18s ease,visibility .18s}
.catalog-panel.is-open,.search-panel.is-open{visibility:visible;opacity:1;pointer-events:auto;transform:translate(-50%,0)}
.catalog-head,.search-head{position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:20px;padding:14px 18px;background:#fff;border-bottom:1px solid var(--border)}
.catalog-brand{display:flex;align-items:center;gap:10px;color:var(--deep);font-size:20px;font-weight:900}.catalog-logo{height:30px;width:auto;max-width:128px;object-fit:contain}
.panel-close{min-width:64px;min-height:44px;border:1px solid var(--border);background:#fff;color:var(--deep);border-radius:10px;font-weight:800}
.catalog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:20px}
.catalog-group h2{margin:0 0 10px;color:var(--deep);font-size:15px}.catalog-group a{display:block;padding:10px 0;border-top:1px solid var(--border)}.catalog-group strong{display:block;color:var(--title);font-size:15px}.catalog-group span{display:block;margin-top:3px;color:var(--soft);font-size:12px;line-height:1.5}
.search-panel{overflow:visible}.search-card{padding-bottom:18px}.search-head h2{margin:2px 0 0;font-size:20px;color:var(--title)}.eyebrow{margin:0;color:var(--brand);font-size:12px;font-weight:900;letter-spacing:.08em}.search-box{display:block;margin:18px}.search-box input{width:100%;height:48px;padding:0 14px;border:1px solid var(--border);border-radius:10px;color:var(--text);background:#fff;outline:none}.search-box input:focus{border-color:var(--bright);box-shadow:0 0 0 3px rgba(0,82,204,.1)}
.search-presets{display:flex;flex-wrap:wrap;gap:10px;padding:0 18px}.search-presets a{display:inline-flex;align-items:center;min-height:44px;padding:0 14px;border:1px solid var(--border);border-radius:9px;color:var(--brand);font-weight:800;background:#fff}.search-presets a:hover,.search-presets a:focus-visible{background:var(--deep-bg);outline:2px solid rgba(0,82,204,.12)}
.hero,.page-hero{padding:42px 0 34px;background:linear-gradient(180deg,#fff 0%,#F5F7FA 100%)}
.hero-media,.page-media{display:flex;align-items:center;justify-content:center;width:100%;background:var(--sub-bg);border:1px solid var(--border);border-radius:16px;overflow:hidden}.hero-media{max-height:300px;min-height:220px}.hero-media img{width:100%;max-height:300px;object-fit:contain;object-position:center}.page-media{min-height:220px}.page-media img{width:100%;max-height:240px;object-fit:contain;object-position:center}.page-media.tall img{max-height:420px}.media-placeholder{display:flex;align-items:center;justify-content:center;min-height:inherit;width:100%;background:linear-gradient(135deg,#F5F7FA,#EEF1F6);color:var(--deep);font-size:34px;font-weight:900;letter-spacing:-.04em}
.hero-copy{max-width:860px;margin:24px auto 0;text-align:left}.hero-copy .kicker,.section-kicker{margin:0 0 6px;color:var(--brand);font-size:13px;font-weight:900;letter-spacing:.08em;text-transform:uppercase}.hero-copy h1,.page-hero h1{margin:0;color:var(--title);font-size:clamp(28px,4vw,32px);line-height:1.25;letter-spacing:-.02em}.hero-copy .lead,.page-lead{margin:14px 0 0;color:var(--muted);font-size:17px}.button-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:10px;font-weight:800}.btn-primary{color:#fff;background:linear-gradient(135deg,#0052CC 0%,#0033A0 50%,#002066 100%)}.btn-secondary{color:var(--brand);background:#fff;border:1px solid var(--brand)}.btn:hover,.btn:focus-visible{transform:translateY(-1px);outline:3px solid rgba(0,82,204,.14);outline-offset:2px}
.section{padding:54px 0}.section.alt{background:var(--deep-bg)}.section-header{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:22px}.section-header h2{margin:0;color:var(--title);font-size:26px;line-height:1.25}.section-header p{max-width:690px;margin:0;color:var(--muted)}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.card-grid.two{grid-template-columns:repeat(2,1fr)}.card-grid.four{grid-template-columns:repeat(4,1fr)}.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:0 8px 24px rgba(0,33,102,.04)}.card h3{margin:0 0 8px;color:var(--title);font-size:19px}.card p{margin:0;color:var(--muted)}.card .card-link{display:inline-flex;align-items:center;min-height:44px;margin-top:10px;color:var(--brand);font-weight:800}
.tile-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.tile{position:relative;min-height:150px;padding:18px;border:1px solid var(--border);border-radius:12px;background:#fff}.tile:before{content:"";position:absolute;left:0;top:18px;width:4px;height:34px;border-radius:0 4px 4px 0;background:var(--bright)}.tile:nth-child(even):before{background:var(--deep)}.tile h3{margin:0 0 6px;color:var(--title);font-size:18px}.tile p{margin:0;color:var(--muted)}.tile a{display:inline-flex;align-items:center;min-height:44px;color:var(--brand);font-weight:800}
.feature-split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:28px;align-items:center}.feature-copy h2{margin:0 0 10px;color:var(--title);font-size:28px}.feature-copy p{margin:0 0 14px;color:var(--muted)}
.number-list{display:grid;gap:10px}.number-item{display:grid;grid-template-columns:56px 1fr;gap:14px;align-items:start;padding:16px 0;border-top:1px solid var(--border)}.number-item:first-child{border-top:0}.number{color:var(--brand);font-size:30px;line-height:1;font-weight:900}.number-item h3{margin:0 0 4px;color:var(--title);font-size:18px}.number-item p{margin:0;color:var(--muted)}
.image-card{padding:0;overflow:hidden}.image-wrap{display:flex;align-items:center;justify-content:center;min-height:190px;background:var(--sub-bg);border-bottom:1px solid var(--border)}.image-wrap img{width:100%;height:200px;object-fit:contain;object-position:center}.image-card .card-body{padding:18px}
.shelf-list{display:grid;gap:12px}.shelf-row{display:grid;grid-template-columns:120px 1fr auto;gap:18px;align-items:center;padding:16px 18px;background:#fff;border:1px solid var(--border);border-radius:12px}.shelf-row .label{color:var(--brand);font-weight:900}.shelf-row h3{margin:0;color:var(--title);font-size:18px}.shelf-row p{margin:3px 0 0;color:var(--muted)}.shelf-row a{display:inline-flex;align-items:center;min-height:44px;color:var(--brand);font-weight:800}
.status-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.status-card{padding:20px;background:#fff;border:1px solid var(--border);border-radius:12px}.status-card .status{display:inline-block;padding:3px 8px;background:var(--sub-bg);color:var(--brand);border-radius:6px;font-size:12px;font-weight:900}.status-card h3{margin:10px 0 6px;color:var(--title)}.status-card p{margin:0;color:var(--muted)}
.prose{max-width:900px;margin:0 auto}.prose h2{margin:34px 0 12px;color:var(--title);font-size:24px}.prose h3{margin:26px 0 8px;color:var(--title);font-size:19px}.prose p{margin:0 0 14px;color:var(--text)}.prose ul,.prose ol{padding-left:1.25em}.prose li{margin:8px 0;color:var(--text)}.prose .note{padding:16px 18px;border-left:4px solid var(--brand);background:var(--deep-bg);border-radius:0 10px 10px 0;color:var(--muted)}
.long-strip{display:grid;grid-template-columns:180px 1fr;gap:22px;padding:22px 0;border-top:1px solid var(--border)}.long-strip:first-child{border-top:0}.long-strip .strip-tag{color:var(--brand);font-weight:900}.long-strip h3{margin:0 0 6px;color:var(--title)}.long-strip p{margin:0;color:var(--muted)}
.quote-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.editor-quote{padding:22px;border:1px solid var(--border);border-radius:12px;background:#fff}.editor-quote strong{display:block;color:var(--brand);font-size:13px}.editor-quote p{margin:8px 0 0;color:var(--text)}
.faq-list{display:grid;gap:12px}.faq-item{border:1px solid var(--border);border-radius:12px;background:#fff;padding:18px}.faq-item h2,.faq-item h3{margin:0 0 8px;color:var(--title);font-size:18px}.faq-item p{margin:0;color:var(--muted)}
.site-footer{background:var(--title);color:#A0AEC0;padding:42px 0 24px}.footer-brand-row{display:flex;align-items:center;justify-content:space-between;gap:28px;padding-bottom:26px;border-bottom:1px solid rgba(255,255,255,.1)}.footer-brand{display:flex;align-items:center;gap:10px;color:#fff}.footer-logo{height:32px;width:auto;max-width:130px;object-fit:contain}.footer-brand span{display:flex;flex-direction:column;line-height:1.1}.footer-brand strong{font-size:20px}.footer-brand small{margin-top:4px;color:#A0AEC0}.footer-brand-row p{max-width:720px;margin:0;color:#A0AEC0}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:28px 0}.footer-grid h2{margin:0 0 10px;color:#fff;font-size:14px}.footer-grid a{display:block;padding:5px 0;color:#A0AEC0}.footer-grid a:hover,.footer-grid a:focus-visible{color:#fff;outline:none;text-decoration:underline}.footer-bottom{display:flex;justify-content:space-between;gap:20px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);font-size:13px}.footer-bottom div{display:flex;gap:16px}.footer-bottom a{color:#CBD5E0}
.mobile-bottom-nav{display:none}
@media (max-width:900px){
  .card-grid.four,.status-grid{grid-template-columns:repeat(2,1fr)}.catalog-grid{grid-template-columns:repeat(2,1fr)}.feature-split{grid-template-columns:1fr}.shelf-row{grid-template-columns:100px 1fr}.shelf-row a{grid-column:2}.footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  :root{--header-h:78px}
  body{padding-bottom:calc(50px + env(safe-area-inset-bottom))}
  .shell{width:min(calc(100% - 32px),var(--shell))}
  .tabbar{display:none}.bookbar-inner{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);gap:8px}.site-logo{height:30px;max-width:108px}.logo-text{font-size:24px}.catalog-trigger,.app-link{min-height:44px;padding:0 10px;font-size:14px}.app-link{white-space:nowrap}
  .overlay{inset:78px 0 0}.catalog-panel,.search-panel{top:78px;width:100%;max-height:66vh;border-left:0;border-right:0;border-radius:0 0 12px 12px}.catalog-grid{grid-template-columns:1fr;gap:8px;padding:12px 16px 18px}.catalog-group h2{margin-top:8px}.catalog-group a{display:grid;grid-template-columns:78px 1fr;gap:10px;align-items:start}.search-panel{background:var(--deep-bg)}.search-card{background:var(--deep-bg)}.search-head{background:var(--deep-bg)}
  .hero,.page-hero{padding:28px 0}.hero-media{min-height:180px}.hero-copy{margin-top:18px}.hero-copy .lead,.page-lead{font-size:16px}.section{padding:40px 0}.section-header{display:block}.section-header p{margin-top:8px}.card-grid,.card-grid.two,.card-grid.four,.tile-grid,.status-grid,.quote-grid{grid-template-columns:1fr}.image-wrap img{height:auto;max-height:220px}.feature-copy h2{font-size:24px}.number-item{grid-template-columns:44px 1fr}.number{font-size:26px}.shelf-row{grid-template-columns:1fr;gap:6px}.shelf-row a{grid-column:auto}.long-strip{grid-template-columns:1fr;gap:6px}.footer-brand-row{display:block}.footer-brand-row p{margin-top:16px}.footer-grid{grid-template-columns:repeat(2,1fr)}.footer-bottom{display:block}.footer-bottom div{margin-top:10px}.site-footer{padding-bottom:34px}
  .mobile-bottom-nav{position:fixed;left:0;right:0;bottom:0;z-index:780;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 var(--border);box-shadow:0 -8px 20px rgba(0,33,102,.06)}.mobile-bottom-nav a{display:flex;align-items:center;justify-content:center;min-width:0;color:var(--muted);font-size:13px;font-weight:800}.mobile-bottom-nav a.is-current{background:var(--brand);color:#fff}
}
@media (max-width:390px){.bookbar-inner{gap:4px}.catalog-trigger,.app-link{padding:0 8px;font-size:13px}.footer-grid{grid-template-columns:1fr}}