:root{--bg:#EEF5FB;--deep:#E3EEF7;--surface:#fff;--soft:#D7E8F4;--ink:#10263A;--text:#243848;--muted:#5A7388;--aux:#7E93A6;--blue:#3B9FE0;--bright:#62B7EE;--steel:#1E6FB8;--ice:#A9D6F2;--mint:#2FA8A0;--line:rgba(30,111,184,.16);--strong:rgba(59,159,224,.38);--shadow:0 16px 40px rgba(16,38,58,.08);--max:1220px;--top:120px}*{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{font:inherit}.site-header{position:fixed;inset:0 0 auto 0;z-index:50}.topline{height:18px;background:var(--steel);color:#fff;font-size:12px;line-height:18px}.topline-inner,.windowbar-inner,.tabrail-inner,.footer-inner,.section-inner{width:min(calc(100% - 32px),var(--max));margin:0 auto}.topline-inner{display:flex;align-items:center;justify-content:space-between;height:18px}.brand-mini{color:#fff;font-weight:700}.top-search{height:18px;padding:0 4px;border:0;background:transparent;color:#fff;cursor:pointer}.windowbar{height:62px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.windowbar-inner{height:62px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px}.brand{justify-self:start;display:flex;align-items:center;min-width:0;color:var(--ink);font-size:20px}.brand-logo{display:block;max-width:180px;height:34px;object-fit:contain;object-position:left center}.book-button,.app-link,.close-button{min-height:44px;border-radius:10px;border:1px solid var(--strong);padding:8px 16px;cursor:pointer}.book-button{justify-self:center;background:var(--surface);color:var(--steel)}.app-link{justify-self:end;display:inline-flex;align-items:center;background:linear-gradient(135deg,var(--bright),var(--blue) 48%,var(--steel));color:#fff;border-color:transparent}.tabrail{height:40px;background:var(--ice);border-bottom:1px solid rgba(30,111,184,.22)}.tabrail-inner{display:flex;align-items:center;height:40px;gap:8px}.tabrail a{height:30px;display:flex;align-items:center;padding:0 12px;border-radius:8px;color:var(--ink);font-size:14px}.tabrail a.is-active{background:var(--blue);color:#fff}.page-main{padding-top:140px;min-height:70vh}.section{padding:36px 0}.section.alt{background:var(--deep)}.section.white{background:var(--surface)}.section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:20px}.eyebrow{margin:0 0 8px;color:var(--steel);font-weight:800;letter-spacing:.08em;font-size:13px}.section h1,.section h2,.section h3{color:var(--ink);line-height:1.28}.section h1{font-size:clamp(28px,4vw,32px);margin:0 0 16px}.section h2{font-size:24px;margin:0 0 10px}.section h3{font-size:18px;margin:0 0 8px}.lead{font-size:17px;color:var(--muted);max-width:820px}.hero-image{width:100%;height:min(300px,40vw);min-height:190px;display:block;object-fit:contain;object-position:center;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow)}.image-placeholder{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f9fcff,var(--deep));border:1px solid var(--line);color:var(--steel);font-weight:800}.content-image{width:100%;height:220px;object-fit:contain;object-position:center;background:#fff;border:1px solid var(--line);border-radius:14px}.app-image{width:100%;max-height:420px;object-fit:contain;object-position:center;background:#fff;border:1px solid var(--line);border-radius:16px}.hero-copy{padding:24px 0 4px}.hero-actions,.inline-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;padding:10px 18px;font-weight:800}.btn.primary{background:linear-gradient(135deg,var(--bright),var(--blue) 48%,var(--steel));color:#fff}.btn.secondary{background:#fff;color:var(--steel);border:1px solid var(--strong)}.tag-grid,.card-grid,.state-grid,.topic-grid,.number-grid,.link-grid{display:grid;gap:16px}.tag-grid{grid-template-columns:repeat(3,1fr)}.tag-card,.card,.state-card,.topic-card,.number-card,.info-box,.prose-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;box-shadow:var(--shadow)}.tag-card b{display:inline-block;color:#fff;background:var(--bright);padding:2px 8px;border-radius:6px;margin-bottom:8px}.tag-card:nth-child(even) b{background:var(--mint)}.tag-card p,.card p,.topic-card p,.state-card p,.number-card p{margin:4px 0 0;color:var(--muted)}.card-grid{grid-template-columns:repeat(4,1fr)}.card .content-image{margin-bottom:14px}.split{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(280px,.9fr);gap:24px;align-items:center}.number-list{display:grid;gap:10px}.number-item{display:grid;grid-template-columns:54px 1fr;gap:12px;align-items:start;padding:14px 0;border-bottom:1px solid var(--line)}.number-item strong{font-size:30px;color:var(--steel);line-height:1}.topic-grid{grid-template-columns:repeat(3,1fr)}.shelf-list{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.shelf-item{background:#fff;border:1px solid var(--line);border-left:4px solid var(--steel);border-radius:10px;padding:16px}.number-grid{grid-template-columns:repeat(5,1fr)}.number-card strong{display:block;font-size:34px;color:var(--steel);line-height:1;margin-bottom:10px}.state-grid{grid-template-columns:repeat(4,1fr)}.state-card{border-top:4px solid var(--blue)}.state-card:nth-child(2){border-top-color:var(--mint)}.state-card:nth-child(3){border-top-color:var(--bright)}.state-card:nth-child(4){border-top-color:var(--aux)}.prose{max-width:880px}.prose p{margin:0 0 1em}.prose h2{margin-top:28px}.prose ul{padding-left:1.2em}.notice{padding:16px 18px;border-left:4px solid var(--mint);background:#fff;border-radius:10px;color:var(--muted)}.faq{display:grid;gap:14px}.faq article{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px}.faq h2{font-size:18px;margin:0 0 8px}.app-layout{display:grid;grid-template-columns:minmax(260px,.7fr) minmax(0,1.3fr);gap:28px;align-items:center}.app-icon-row{display:flex;align-items:center;gap:14px;margin-bottom:14px}.app-icon{width:64px;height:64px;object-fit:contain;border-radius:14px;background:#fff;border:1px solid var(--line)}.site-footer{background:var(--ink);color:#C7D8E6;padding:42px 0 90px}.footer-brand{display:flex;align-items:center;gap:14px;margin-bottom:26px}.footer-brand strong{display:block;color:#fff;font-size:20px}.footer-brand span{display:block;font-size:12px}.footer-logo{height:34px;max-width:180px;object-fit:contain}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}.footer-grid h2{font-size:15px;color:#fff;margin:0 0 10px}.footer-grid a{display:block;color:#C7D8E6;margin:5px 0;font-size:14px}.footer-note{border-top:1px solid rgba(255,255,255,.12);padding-top:20px;margin-top:24px;color:#AFC2D3}.copyright{color:#8FA7BB;font-size:13px}.overlay{position:fixed;inset:0;background:rgba(16,38,58,.36);z-index:60;opacity:0;pointer-events:none;transition:.18s}.overlay.is-open{opacity:1;pointer-events:auto}.book-panel,.search-panel{position:fixed;left:0;right:0;top:80px;z-index:70;visibility:hidden;pointer-events:none;transform:translateY(-10px);opacity:0;transition:.18s}.book-panel.is-open,.search-panel.is-open{visibility:visible;pointer-events:auto;transform:none;opacity:1}.book-panel{width:min(calc(100% - 32px),var(--max));max-height:50vh;overflow:auto;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow)}.book-head,.search-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line)}.book-brand{display:flex;align-items:center;gap:10px}.book-brand img{height:30px;max-width:160px;object-fit:contain}.close-button{background:#fff;color:var(--steel)}.book-groups{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:16px}.book-group h2{font-size:15px;color:var(--steel);margin:0 0 8px}.book-group a{display:block;padding:8px;border-radius:8px}.book-group a:hover{background:var(--bg)}.book-group b{display:block;color:var(--ink);font-size:14px}.book-group span{display:block;color:var(--aux);font-size:12px;line-height:1.5}.search-panel{width:min(calc(100% - 32px),760px);margin:0 auto}.search-card{background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);padding-bottom:18px}.search-look{margin:18px;border:1px solid var(--strong);border-radius:10px;min-height:50px;display:flex;align-items:center;padding:0 16px;color:var(--aux);background:var(--bg)}.preset-links{display:flex;gap:10px;flex-wrap:wrap;padding:0 18px}.preset-links a{padding:8px 12px;background:var(--deep);color:var(--steel);border-radius:8px}.mobile-bottom{display:none}.table-like{display:grid;gap:12px}.table-row{display:grid;grid-template-columns:180px 1fr;gap:16px;padding:16px;background:#fff;border:1px solid var(--line);border-radius:10px}.table-row strong{color:var(--ink)}.quote-view{background:linear-gradient(135deg,#fff,#e8f5fd);border:1px solid var(--line);padding:22px;border-radius:14px}.quote-view b{color:var(--steel)}
@media(max-width:900px){.card-grid{grid-template-columns:repeat(2,1fr)}.topic-grid{grid-template-columns:repeat(2,1fr)}.number-grid{grid-template-columns:repeat(3,1fr)}.state-grid{grid-template-columns:repeat(2,1fr)}.book-groups{grid-template-columns:repeat(2,1fr)}.split,.app-layout{grid-template-columns:1fr}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){:root{--top:80px}.tabrail{display:none}.page-main{padding-top:96px}.windowbar-inner{grid-template-columns:minmax(0,1fr) auto auto;gap:8px}.brand{font-size:17px}.brand-logo{max-width:130px;height:30px}.book-button,.app-link{min-height:44px;padding:8px 11px}.section{padding:28px 0}.section-head{display:block}.tag-grid,.card-grid,.topic-grid,.number-grid,.state-grid,.shelf-list,.footer-grid{grid-template-columns:1fr}.hero-image{height:220px}.content-image{height:200px}.book-panel,.search-panel{top:80px;width:100%;max-height:66vh;border-radius:0}.book-groups{grid-template-columns:1fr;padding:12px}.search-panel{height:calc(100vh - 80px);background:var(--ice)}.search-card{min-height:100%;border-radius:0;background:var(--ice)}.search-look,.search-card .close-button{background:#fff}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(5,1fr);left:0;right:0;bottom:0;z-index:55;height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:#fff;border-top:1px solid var(--line)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;min-height:50px;font-size:13px;color:var(--steel)}.mobile-bottom a.is-active{background:var(--blue);color:#fff}.site-footer{padding-bottom:110px}.table-row{grid-template-columns:1fr;gap:6px}.number-item{grid-template-columns:44px 1fr}.number-item strong{font-size:25px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
a:focus-visible,button:focus-visible{outline:3px solid rgba(59,159,224,.5);outline-offset:2px}