:root{--bg:#f6f7f9;--card:#ffffff;--border:#e5e7eb;--primary:#2563eb;--primary-hover:#1d4ed8;--danger:#dc2626;--ok:#16a34a;--warn:#d97706;--text:#111827;--muted:#4b5563}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}a{color:var(--primary);text-decoration:none}.container{max-width:1080px;margin:0 auto;padding:24px 16px}.card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:20px;margin-bottom:16px}.topbar{background:#fff;border-bottom:1px solid var(--border);padding:0 24px;display:flex;align-items:center;gap:24px;min-height:52px}.topbar .brand{font-weight:700;font-size:16px;white-space:nowrap}.subject-switch{position:relative;flex-shrink:0}.subject-switch-trigger{display:inline-flex;align-items:center;gap:6px;max-width:200px;padding:5px 10px;font-size:13px;color:var(--primary);background:rgba(22,119,255,.08);border:1px solid rgba(22,119,255,.25);border-radius:999px;cursor:pointer}.subject-switch-trigger:hover,.subject-switch-trigger[aria-expanded=true]{background:rgba(22,119,255,.14)}.subject-switch-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}.subject-switch-caret{font-size:10px;flex-shrink:0}.subject-switch-menu{position:absolute;top:calc(100% + 6px);left:0;z-index:60;min-width:190px;margin:0;padding:6px;list-style:none;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:0 8px 24px rgba(0,0,0,.12)}.subject-switch-menu button{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;padding:8px 10px;font-size:13px;color:inherit;background:none;border:0;border-radius:6px;cursor:pointer;text-align:left;white-space:nowrap}.subject-switch-menu button:hover{background:rgba(22,119,255,.08)}.subject-switch-menu button.active{color:var(--primary);font-weight:600}.subject-switch-check{color:var(--primary)}.subject-switch-group+.subject-switch-group{margin-top:4px;padding-top:4px;border-top:1px solid var(--border)}.subject-switch-group ul{margin:0;padding:0;list-style:none}.subject-switch-group-label{padding:4px 10px 2px;font-size:11px;color:var(--muted,#888);letter-spacing:2px}.topbar nav{display:flex;gap:18px;flex:1 1}.topbar nav a{color:var(--muted);padding:4px 2px}.topbar nav a.active,.topbar nav a:hover{color:var(--primary)}h1{font-size:20px;margin-bottom:16px}h2{font-size:16px;margin-bottom:12px}table{width:100%;border-collapse:collapse}td,th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--border);vertical-align:top}th{color:var(--muted);font-weight:500}button,th{font-size:13px}button{cursor:pointer;border:1px solid transparent;border-radius:6px;padding:7px 14px;background:var(--primary);color:#fff}button:hover{background:var(--primary-hover)}button.ghost{background:#fff;color:var(--text);border:1px solid var(--border)}button.ghost:hover{background:#f3f4f6}button.danger{background:var(--danger)}button.ok{background:var(--ok)}button:disabled{opacity:.5;cursor:not-allowed}input,select,textarea{width:100%;border:1px solid var(--border);border-radius:6px;padding:8px 10px;font-size:14px;font-family:inherit;background:#fff}textarea.code{font-family:Consolas,monospace;font-size:13px;min-height:320px}label{display:block;margin:10px 0 4px;font-size:13px}.tag,label{color:var(--muted)}.tag{display:inline-block;border-radius:999px;padding:1px 10px;font-size:12px;border:1px solid var(--border)}.tag.published{color:var(--ok);border-color:var(--ok);background:#f0fdf4}.tag.pending{color:var(--warn);border-color:var(--warn);background:#fffbeb}.tag.rejected{color:var(--danger);border-color:var(--danger);background:#fef2f2}.tag.aigc{color:#7c3aed;border-color:#7c3aed;background:#f5f3ff}.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));grid-gap:16px;gap:16px}.stat .num{font-size:28px;font-weight:700}.stat .label{color:var(--muted)}.row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.muted{color:var(--muted)}.error{color:var(--danger);margin:8px 0}.material{white-space:pre-wrap;font-family:ui-monospace,SFMono-Regular,Consolas,Courier New,monospace;background:#f9fafb;padding:14px;margin:8px 0 16px;overflow-x:auto}.material,.md-img{border:1px solid var(--border);border-radius:8px}.md-img{display:block;max-width:100%;height:auto;margin:4px 0 12px;background:#fff}.point{border-left:3px solid var(--primary);padding:6px 12px;margin:8px 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.head{display:flex;justify-content:space-between;gap:8px;align-items:baseline}.point-row .kw{color:#16a34a;font-size:13px}.risk-badge{display:inline-block;background:#fef9c3;color:#854d0e;border:1px solid #fde047;border-radius:4px;font-size:11px;padding:0 6px;margin-left:6px}.subq-title{font-weight:600;margin:18px 0 8px}.subq-head{display:flex;align-items:baseline;gap:8px;cursor:pointer;margin:18px 0 8px;-webkit-user-select:none;-moz-user-select:none;user-select:none}.sub-label{font-size:12px;font-weight:600;color:#6b7280;margin:12px 0 4px}.ref{color:#374151;background:#f9fafb;border-radius:6px;padding:6px 8px;margin-top:6px}.actions-row{gap:10px}.actions-row,.wb-row{display:flex;align-items:center;flex-wrap:wrap}.wb-row{justify-content:space-between;gap:12px;padding:12px 16px;border:1px solid #e5e7eb;border-radius:10px;background:#fff;margin-bottom:10px}.wb-row .mastered{color:#16a34a;font-size:12px}.card-box{border:1px solid #e5e7eb;border-radius:10px;background:#fff;padding:14px 16px;margin-bottom:12px}.card-box .head{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:8px;flex-wrap:wrap}.card-box pre{white-space:pre-wrap;font-family:inherit;font-size:13px;line-height:1.7;margin:0}.status-btn{font-size:13px;padding:6px 14px;cursor:pointer}.md-body{font-size:13px;line-height:1.8}.md-body>div{margin-bottom:2px}.md-table{border-collapse:collapse;margin:6px 0;font-size:12.5px}.md-table td{border:1px solid #e5e7eb;padding:4px 10px}.md-table tr.md-th td{background:#f3f4f6;font-weight:600}.md-pre{background:#f8f9fb;border:1px solid #e5e7eb;border-radius:8px;padding:10px 12px;margin:6px 0;font-size:12.5px;line-height:1.6;font-family:ui-monospace,SFMono-Regular,Consolas,Courier New,monospace;white-space:pre;overflow-x:auto}.md-quote{border-left:3px solid #d1d5db;padding-left:10px;color:#4b5563}.card-toggle{display:flex;justify-content:space-between;align-items:center;gap:8px;width:100%;padding:12px 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14px;cursor:pointer}.mode-chip.on{color:#1d4ed8;border-color:#1d4ed8;background:#eff6ff;font-weight:700}.reveal-box.feedback-ok{background:#f0fdf4;border-color:#86efac}.reveal-box.feedback-bad{background:#fef2f2;border-color:#fca5a5}.reveal-box{background:#eff6ff;border:1px solid #bfdbfe;border-radius:8px;padding:10px 14px;margin-bottom:16px}.chart-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(360px,1fr));grid-gap:16px;gap:16px;margin-top:16px}.chart-card{padding:16px}.chart-card h2{margin:0;font-size:16px}.chart-head{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:8px;margin-bottom:8px}.seg{display:flex;gap:6px}.seg button{padding:3px 12px;border-radius:999px;font-size:12px}.legend{display:flex;gap:14px;font-size:12px;color:var(--muted);margin-bottom:4px}.legend i{display:inline-block;width:10px;height:10px;border-radius:2px;margin-right:4px;vertical-align:-1px}.timer{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;font-size:14px;font-weight:700;color:#1f2937}.timer.urgent{color:#dc2626}