:root{--bg-page:#f3f6fb;--bg-surface:#fff;--bg-surface-soft:#f8fafc;--bg-sidebar:#0f172a;--bg-sidebar-hover:#1e293b;--bg-sidebar-active:#172554;--text-primary:#0f172a;--text-secondary:#475569;--text-sidebar-primary:#e2e8f0;--text-sidebar-muted:#94a3b8;--border-color:#e2e8f0;--border-strong:#cbd5e1;--brand:#2563eb;--brand-hover:#1d4ed8;--success-bg:#ecfdf3;--success-border:#86efac;--success-text:#166534;--warning-bg:#fffbeb;--warning-border:#fcd34d;--warning-text:#92400e;--error-bg:#fef2f2;--error-border:#fca5a5;--error-text:#991b1b;--shadow-soft:0 8px 24px #0f172a14;--shadow-card:0 2px 8px #0f172a0d;--radius-lg:14px;--radius-md:10px;--radius-sm:8px;--sidebar-width:296px;--header-height:66px}*{box-sizing:border-box}html,body{height:100%;margin:0;padding:0}body{background:var(--bg-page);color:var(--text-primary);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe 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var(--border-color);z-index:20;justify-content:space-between;align-items:center;gap:18px;padding:0 24px;display:flex;position:sticky;top:0}.breadcrumb{color:var(--text-secondary);align-items:center;gap:8px;font-size:13px;display:flex}.breadcrumb span{color:var(--text-primary);font-weight:600}.search-container{position:relative}.search-icon{color:#64748b;width:14px;height:14px;position:absolute;top:50%;left:11px;transform:translateY(-50%)}.search-input{border:1px solid var(--border-color);border-radius:var(--radius-sm);background:var(--bg-surface-soft);width:320px;max-width:45vw;color:var(--text-primary);outline:none;padding:9px 12px 9px 34px;font-size:13px;transition:border-color .2s,box-shadow .2s,background-color .2s}.search-input:focus{background:#fff;border-color:#93c5fd;box-shadow:0 0 0 3px #2563eb24}.search-results{border:1px solid 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var(--border-color);background:#f8fafc;border-radius:10px;width:100%;min-height:620px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:999px}::-webkit-scrollbar-thumb:hover{background:#94a3b8}@media (width<=1180px){:root{--sidebar-width:260px}.kb-container{max-width:100%}}@media (width<=900px){body{flex-direction:column;height:auto;overflow:auto}.sidebar{width:100%;max-height:260px}.top-bar{flex-direction:column;align-items:stretch;gap:10px;height:auto;padding:12px 16px;position:static}.content-area{padding:16px;overflow:visible}.breadcrumb{flex-wrap:wrap;gap:6px;width:100%}.search-container{width:100%}.search-input{width:100%;max-width:none}.search-results{width:100%;left:0;right:auto}.card-header{flex-direction:column;align-items:flex-start}}@media (width<=680px){.top-bar{padding:10px 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