:root{color-scheme:light;--blue: #2563eb;--blue-dark: #1d4ed8;--orange: #f97316;--green: #10b981;--ink: #111827;--muted: #64748b;--line: #e5e7eb;--soft: #f8fafc}*{box-sizing:border-box}body{margin:0;background:#f8fafc;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:inherit;text-decoration:none}.container{width:min(1120px,calc(100% - 32px));margin:0 auto}.container.wide{width:min(1280px,calc(100% - 32px))}.site-header{position:sticky;top:0;z-index:10;background:linear-gradient(90deg,#2563eb,#1d4ed8);box-shadow:0 1px 4px #0f172a1f}.nav{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:20px}.brand{color:#fff;font-weight:800;font-size:22px;padding:8px 10px;border-radius:8px;white-space:nowrap}.brand:hover{background:#ffffff1a}.nav nav{display:flex;gap:4px;font-size:14px;color:#fff;overflow-x:auto;white-space:nowrap}.nav nav a{padding:8px 12px;border-radius:8px;transition:background .18s ease,transform .18s ease}.nav nav a:hover{background:#ffffff1f;transform:translateY(-1px)}.hero{background:linear-gradient(90deg,#2563eb,#1d4ed8);color:#fff;padding:48px 0}.hero-inner{text-align:center}.hero h1{margin:0 0 20px;font-size:clamp(30px,4vw,40px);line-height:1.18;letter-spacing:0}.hero p{max-width:900px;margin:0 auto 28px;color:#dbeafe;font-size:18px;line-height:1.7}.section{padding:32px 0}.panel{background:#fff;border:1px solid var(--line);border-radius:8px;box-shadow:0 6px 20px #0f172a0d}.grid{display:grid;gap:18px}.chips{display:flex;flex-wrap:wrap;gap:10px}.chip{display:inline-flex;align-items:center;min-height:34px;padding:0 12px;border:1px solid var(--line);border-radius:999px;background:#fff;color:#334155;font-size:14px}.chip:hover{border-color:var(--blue);color:var(--blue)}.footer{padding:28px 0;border-top:1px solid #1f2937;color:#9ca3af;font-size:13px;background:#111827}.search-form{display:flex;max-width:760px;margin:0 auto;background:#fff;border-radius:12px;box-shadow:0 18px 40px #0f172a2e;overflow:hidden}.search-form input{flex:1;min-width:0;border:0;padding:15px 20px;font-size:16px;outline:none}.button{border:0;padding:0 24px;background:#111827;color:#fff;font-weight:700;cursor:pointer}.search-button{background:var(--orange);min-width:104px;transition:background .18s ease}.search-button:hover{background:#ea580c}.resource-button{display:inline-flex;align-items:center;justify-content:center;padding:0 18px;background:var(--green);color:#fff;font-size:13px;font-weight:700;white-space:nowrap}.resource-button:hover{background:#059669}.version-sections{background:#f9fafb}.version-section{margin-bottom:32px}.version-panel{background:#fff;border-radius:8px;padding:24px;margin-bottom:14px;box-shadow:0 1px 3px #0f172a14;border:1px solid #eef2f7}.version-heading{display:flex;justify-content:space-between;align-items:flex-start;gap:20px;margin-bottom:18px}.version-title-wrap{display:flex;align-items:center;gap:16px;min-width:0}.version-icon{width:48px;height:48px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:800;flex:0 0 auto}.version-heading h2{margin:0;font-size:24px;line-height:1.25;color:#111827}.version-heading p{margin:6px 0 0;color:#4b5563;font-size:14px}.version-actions{display:flex;gap:12px;align-items:center;flex:0 0 auto}.secondary-action,.primary-action{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border-radius:8px;font-size:14px;font-weight:700;transition:background .18s ease,transform .18s ease}.secondary-action{background:#f3f4f6;color:#374151}.secondary-action:hover{background:#e5e7eb}.primary-action{background:var(--blue);color:#fff}.primary-action:hover{background:var(--blue-dark);transform:translateY(-1px)}.primary-action.large{min-height:52px;padding:0 28px;font-size:17px}.quick-nav{border-top:1px solid #f1f5f9;padding-top:14px;display:grid;gap:12px}.quick-row{display:grid;grid-template-columns:84px 1fr;align-items:start;gap:12px}.quick-label{color:#374151;font-size:14px;font-weight:800;line-height:28px}.quick-links{display:flex;flex-wrap:wrap;gap:6px}.quick-links a{display:inline-flex;align-items:center;min-height:28px;padding:0 9px;border:1px solid #e5e7eb;border-radius:4px;background:#f9fafb;color:#374151;font-size:12px;transition:border-color .18s ease,color .18s ease,background .18s ease}.quick-links a:hover{border-color:#93c5fd;background:#eff6ff;color:var(--blue)}.quick-links a.more-link{background:#dbeafe;border-color:#93c5fd;color:#1d4ed8}.book-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:12px}.book-card{display:block;padding:8px;background:#fff;border:1px solid #e5e7eb;border-radius:8px;transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;overflow:hidden}.book-card:hover{transform:translateY(-3px);box-shadow:0 10px 22px #0f172a1a;border-color:#bfdbfe}.book-card img{width:100%;aspect-ratio:3 / 4;object-fit:cover;background:linear-gradient(135deg,#eff6ff,#dbeafe);border-radius:6px;display:block}.book-info{padding:9px 4px 2px}.book-card strong{display:-webkit-box;min-height:34px;overflow:hidden;-webkit-line-clamp:2;-webkit-box-orient:vertical;line-height:1.35;font-size:13px;font-weight:700;color:#111827}.book-card:hover strong{color:var(--blue)}.book-card span{display:block;margin-top:7px;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.more-panel{margin-top:44px;padding:32px 24px;text-align:center;background:#fff;border-radius:8px;box-shadow:0 1px 3px #0f172a14;border:1px solid #eef2f7}.more-panel h2{margin:0 0 12px;font-size:26px;color:#111827}.more-panel p{margin:0 auto 22px;max-width:640px;color:#4b5563;line-height:1.7}.stats-section{background:#f9fafb;padding-top:16px}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;text-align:center}.stat-card{background:#fff;border-radius:8px;padding:24px 12px;box-shadow:0 1px 3px #0f172a14;border:1px solid #eef2f7}.stat-card strong{display:block;font-size:26px;line-height:1;margin-bottom:10px}.stat-card span{color:#4b5563;font-size:14px}.stat-card.blue strong{color:#2563eb}.stat-card.green strong{color:#16a34a}.stat-card.purple strong{color:#9333ea}.stat-card.orange strong{color:#ea580c}@media(max-width:720px){.nav{align-items:flex-start;flex-direction:column;padding:12px 0}.nav nav{width:100%}.search-form{flex-direction:column}.button,.resource-button{min-height:46px}.hero{padding:40px 0}.hero h1{font-size:28px}.hero p{font-size:16px}.version-heading{flex-direction:column;align-items:stretch}.version-actions{width:100%}.version-actions a{flex:1}.quick-row{grid-template-columns:1fr;gap:6px}.quick-label{line-height:1.4}.book-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.version-panel{padding:18px}.more-panel{padding:26px 16px}}@media(min-width:721px)and (max-width:1024px){.book-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}