:root{--bg: #eef2f6;--panel: #ffffff;--ink: #1f2937;--muted: #667085;--line: #d9e1ea;--dark: #101828;--accent: #0f766e;--accent-2: #2563eb;--sales: #dcfce7;--customer: #ffffff;--warning: #fff7ed}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Arial,Noto Sans TC,Microsoft JhengHei,sans-serif}button,input,select{font:inherit}.loading-screen,.center{min-height:100vh;display:flex;align-items:center;justify-content:center;gap:10px}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.app-shell{display:grid;grid-template-columns:380px 1fr;min-height:100vh}.sidebar{background:var(--dark);color:#f9fafb;max-height:100vh;overflow:auto;padding:18px}.brand-block{display:flex;gap:12px;align-items:center;margin-bottom:16px}.brand-icon{width:38px;height:38px;border:1px solid #344054;border-radius:8px;display:grid;place-items:center;background:#1f2937}.brand-block h1{font-size:18px;margin:0 0 4px}.brand-block p,.muted{color:#98a2b3;margin:0;font-size:12px;line-height:1.6}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-bottom:10px}.stat{background:#ffffff14;border:1px solid rgba(255,255,255,.12);border-radius:8px;padding:10px}.stat span{display:block;color:#aab4c2;font-size:12px}.stat b{display:block;margin-top:4px;font-size:18px}.filter-panel{display:grid;gap:8px;margin-bottom:14px}.category-snapshot{display:grid;gap:6px;margin-bottom:14px}.category-snapshot button{display:flex;justify-content:space-between;gap:10px;align-items:center;border:1px solid #344054;background:#111827;color:#e5e7eb;border-radius:8px;padding:8px 10px;cursor:pointer}.category-snapshot button.active{border-color:#5eead4;color:#ccfbf1;background:#0f3f46}.category-snapshot span{font-size:12px}.category-snapshot b{font-size:13px}.search-box,.filter-row label{display:flex;align-items:center;gap:8px;background:#0b1220;border:1px solid #344054;border-radius:8px;padding:8px 10px}.search-box input,.filter-row select{width:100%;min-width:0;border:0;outline:0;background:transparent;color:#fff}.filter-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.case-list{display:grid;gap:8px}.case-card{border:1px solid #344054;background:#182235;color:#fff;border-radius:8px;padding:11px;text-align:left;cursor:pointer}.case-card.active{border-color:#5eead4;background:#0f3f46}.case-card-title,.case-card-meta{display:block}.case-card-title{font-weight:750;line-height:1.35}.case-card-meta{color:#cbd5e1;font-size:12px;margin-top:5px}.case-card-summary{display:block;color:#d8e2ee;font-size:12px;line-height:1.45;margin-top:7px}.tag-row{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}.tag{border:1px solid #d9e1ea;background:#f8fafc;color:#344054;border-radius:999px;padding:3px 8px;font-size:12px}.tag.strong{color:#0f766e;border-color:#99f6e4;background:#ecfdf5}.content{max-height:100vh;overflow:auto;padding:22px}.hero-panel,.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px}.hero-panel{padding:18px;margin-bottom:14px}.hero-panel h2{margin:4px 0 8px;font-size:24px}.hero-panel p{margin:0;color:#526071;line-height:1.65}.eyebrow{color:var(--accent);font-weight:800;font-size:12px}.hero-metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin-top:14px}.hero-metrics .stat{background:#f8fafc;color:var(--ink)}.learning-strip{display:grid;grid-template-columns:2fr .65fr 1.4fr;gap:8px;margin-top:14px}.learning-strip div{border:1px solid var(--line);background:#f8fafc;border-radius:8px;padding:10px}.learning-strip span,.summary-block span{display:block;color:var(--muted);font-size:12px;font-weight:700}.learning-strip b{display:block;margin-top:4px;line-height:1.45;font-size:13px}.content-grid{display:grid;grid-template-columns:360px 1fr;gap:14px;align-items:start}.notes-shell{position:sticky;top:16px;max-height:calc(100vh - 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