:root{--blue:#315da8;--purple:#6551ce;--bg:#f5f7fb;--card:#fff;--text:#182033;--muted:#687386;--border:#e1e6ef;--shadow:0 8px 28px rgba(32,54,92,.08);font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:var(--bg)}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.sidebar{position:fixed;inset:0 auto 0 0;width:236px;background:#fff;border-right:1px solid var(--border);padding:20px 14px;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:750}.brand img{width:38px;height:38px}.sidebar .brand{padding:0 10px 20px}.sidebar nav{display:grid;gap:5px}.sidebar nav a{padding:11px 14px;border-radius:10px;color:#445066}.sidebar nav a:hover{background:#edf4ff;color:var(--blue)}.page{margin-left:236px;padding:32px;min-height:100vh}.mobile-header,.bottom-nav{display:none}.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:22px}.page-head h1{margin:0;font-size:28px}.page-head p{margin:6px 0 0}.muted,.empty{color:var(--muted)}.small,small{font-size:13px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px;box-shadow:var(--shadow)}.card h2{font-size:18px;margin:0 0 14px}.card-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:8px}.card-head a{color:var(--blue);font-size:14px}.dashboard-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.quick-actions{display:flex;gap:10px;margin:16px 0 22px}.button{border:1px solid var(--border);background:#fff;border-radius:10px;padding:9px 15px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center}.button:hover{border-color:#aabbd6}.button.primary{background:var(--blue);border-color:var(--blue);color:#fff}.button:disabled{opacity:.5;cursor:not-allowed}.small-button{padding:6px 10px}.search-bar,.filter-bar{display:flex;gap:8px;margin-bottom:20px}.search-bar input,.filter-bar input{min-width:0;flex:1;border:1px solid var(--border);border-radius:12px;padding:12px 15px;background:#fff}.search-bar button,.filter-bar button,.filter-bar select{border:1px solid var(--border);border-radius:12px;background:#fff;padding:0 16px}.list{display:grid}.list-row{display:flex;align-items:center;justify-content:space-between;gap:15px;padding:12px 4px;border-bottom:1px solid var(--border)}.list-row:last-child{border-bottom:0}.list-row small{color:var(--muted)}.source-row>div{display:grid;gap:4px}.catalog-layout{display:grid;grid-template-columns:minmax(280px,34%) 1fr;gap:18px}.tree details{margin:5px 0}.tree summary{cursor:pointer;padding:8px;border-radius:8px;font-weight:650}.tree details details{margin-left:14px}.tree a{display:block;margin-left:28px;padding:8px 10px;border-radius:8px;color:#445066}.tree a:hover{background:#edf4ff;color:var(--blue)}.catalog-welcome{min-height:340px;display:grid;place-content:center;text-align:center}.breadcrumbs{color:var(--muted);font-size:14px;margin-bottom:10px}.eyebrow{color:var(--blue);font-weight:750}.question-head h1{margin-top:4px}.head-actions{display:flex;gap:8px}.tabs{display:flex;gap:6px;overflow:auto;margin-bottom:14px}.tabs a{white-space:nowrap;padding:10px 14px;border-radius:10px;color:var(--muted)}.tabs a.active,.tabs a:hover{background:#eaf2ff;color:var(--blue)}.reading-content{min-height:280px;line-height:1.8}.reading-content img,.reading-content svg{max-width:100%;height:auto}.section-block{margin-top:16px}.empty-state{text-align:center;padding:48px 20px}.empty-state h2{margin-bottom:8px}.editor-form textarea{width:100%;border:1px solid var(--border);border-radius:12px;padding:16px;line-height:1.6;resize:vertical;background:#fff}.form-actions{display:flex;justify-content:flex-end;gap:10px;margin-top:12px}.search-results,.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.messages{margin-bottom:16px}.message{padding:12px 14px;border-radius:10px;background:#e8f3ff;color:#174b82}.message.error{background:#fff0f0;color:#9d2a2a}.auth-page{margin-left:0;display:grid;place-items:center}.login-card{width:min(420px,calc(100vw - 30px));background:#fff;border:1px solid var(--border);border-radius:20px;padding:32px;box-shadow:var(--shadow);text-align:center}.login-logo{width:86px;height:86px}.login-card h1{margin:12px 0 0}.stack{display:grid;gap:15px;text-align:left;margin-top:24px}.stack label{display:grid;gap:6px}.stack input{width:100%;padding:11px 12px;border:1px solid var(--border);border-radius:10px}.error-text{color:#a52c2c}@media(max-width:800px){.sidebar{display:none}.page{margin:0;padding:76px 14px 78px}.mobile-header{display:block;position:fixed;z-index:10;inset:0 0 auto;background:#fff;border-bottom:1px solid var(--border);padding:10px 14px}.mobile-header .brand img{width:34px;height:34px}.bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;z-index:10;inset:auto 0 0;background:#fff;border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}.bottom-nav a{text-align:center;padding:13px 4px;font-size:13px;color:#4f5b70}.dashboard-grid,.search-results,.settings-grid{grid-template-columns:1fr}.catalog-layout{display:block}.catalog-welcome{display:none}.page-head{align-items:flex-start}.page-head h1{font-size:23px}.question-head{display:block}.head-actions{margin-top:14px}.quick-actions .button{flex:1}.card{border-radius:14px;padding:16px}.list-row{align-items:flex-start;flex-direction:column;gap:4px}.tabs{margin-left:-4px}.auth-page{padding:20px}.login-card{padding:24px}.filter-bar{flex-wrap:wrap}.filter-bar input{flex-basis:100%}}