:root{--bg: #FFFFFF;--sidebar: #191D2B;--sidebar-hover: #252B3D;--blue: #3B7DD8;--gold: #C5961B;--gold-light:#F0C040;--text: #2A2A2A;--text-muted:#6B6B6B;--card-bg: #F2F0EB;--border: #D4D1CB;--book-color:#8B3A3A;--concept-color:#3B7DD8}*{box-sizing:border-box;margin:0;padding:0}body{font-family:Georgia,"Noto Serif SC",serif;background:var(--bg);color:var(--text);display:flex;min-height:100vh}#sidebar{width:220px;min-height:100vh;background:var(--sidebar);display:flex;flex-direction:column;position:fixed;top:0;left:0;bottom:0;overflow-y:auto;z-index:100}#sidebar .logo{padding:20px 16px 14px;font-size:15px;font-weight:700;color:var(--gold);border-bottom:1px solid #2e3347;letter-spacing:.5px}#sidebar nav{flex:1;padding:12px 0}#sidebar nav a,#sidebar nav .section-title{display:block;padding:7px 16px;color:#aab0c4;text-decoration:none;font-size:13px;transition:background .15s,color .15s}#sidebar nav a:hover{background:var(--sidebar-hover);color:#fff}#sidebar nav a.router-link-active{background:var(--sidebar-hover);color:var(--gold)}#sidebar nav .section-title{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:#555e78;margin-top:8px;cursor:default}#sidebar .chat-btn{margin:0;padding:16px;background:linear-gradient(135deg,#2a3560,#1a2040);border-top:1px solid #2e3347}#sidebar .chat-btn a{display:flex;align-items:center;gap:8px;padding:10px 14px;background:linear-gradient(135deg,var(--gold) 0%,#a07818 100%);color:#fff!important;border-radius:6px;font-size:13px;font-weight:700;text-decoration:none;letter-spacing:.3px}#sidebar .chat-btn a:hover{filter:brightness(1.1)}#sidebar .chat-btn a .new-badge{background:#f44;color:#fff;font-size:10px;padding:1px 5px;border-radius:3px;margin-left:auto}#main{margin-left:220px;flex:1;padding:32px;min-height:100vh}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:8px;padding:20px;margin-bottom:16px}.card:hover{border-color:var(--blue)}.page-title{font-size:26px;font-weight:700;color:var(--text);margin-bottom:6px}.page-subtitle{font-size:14px;color:var(--text-muted);margin-bottom:24px}.tag{display:inline-block;background:#dde4f0;color:var(--blue);padding:2px 8px;border-radius:4px;font-size:11px;margin:2px;font-family:sans-serif}.tag.book{background:#f0e0e0;color:var(--book-color)}.tag.concept{background:#dde4f0;color:var(--concept-color)}.tag.domain{background:#ede8d5;color:#7a6020}.md-content h1{font-size:22px;margin:20px 0 10px;color:var(--text)}.md-content h2{font-size:18px;margin:18px 0 8px;color:var(--text);border-bottom:1px solid var(--border);padding-bottom:4px}.md-content h3{font-size:15px;margin:14px 0 6px;color:var(--text)}.md-content p{line-height:1.7;margin-bottom:10px}.md-content ul,.md-content ol{padding-left:20px;margin-bottom:10px}.md-content li{line-height:1.7;margin-bottom:4px}.md-content blockquote{border-left:3px solid var(--gold);padding:8px 16px;background:#f8f5e8;color:#555;margin:12px 0;font-style:italic}.md-content a{color:var(--blue);text-decoration:none}.md-content a:hover{text-decoration:underline}.md-content table{border-collapse:collapse;width:100%;margin:12px 0;font-size:13px}.md-content th,.md-content td{border:1px solid var(--border);padding:6px 10px;text-align:left}.md-content th{background:#e8e4dc}.md-content code{background:#e8e4dc;padding:1px 5px;border-radius:3px;font-size:12px}.md-content pre{background:#1e2230;color:#cdd6f4;padding:14px;border-radius:6px;overflow-x:auto;font-size:12px;line-height:1.5;margin:12px 0}.md-content .wiki-link{color:var(--blue);background:#ebf0fa;padding:1px 4px;border-radius:3px;text-decoration:none;font-size:.95em}.md-content .wiki-link:hover{background:var(--blue);color:#fff}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media(max-width:900px){.grid-2,.grid-3{grid-template-columns:1fr}}.btn{display:inline-block;padding:6px 14px;background:var(--blue);color:#fff;border:none;border-radius:5px;cursor:pointer;font-size:13px;text-decoration:none;transition:background .15s}.btn:hover{background:#2860b0}.btn-ghost{background:transparent;color:var(--blue);border:1px solid var(--blue)}.btn-ghost:hover{background:var(--blue);color:#fff}#layout{display:flex;min-height:100vh}