:root{--bg:#f6f7fb;--card:#fff;--border:#e5e8f0;--text:#1a1f36;--sub:#6b7280;--accent:#4f46e5;--accent-soft:#eef2ff;--star:#f59e0b}
[data-theme="dark"]{--bg:#0f1117;--card:#191c26;--border:#2a2f3d;--text:#e6e8ef;--sub:#9aa3b2;--accent:#818cf8;--accent-soft:#1e2130}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.65;min-height:100vh}
a{color:var(--accent);text-decoration:none}
.site-header{background:linear-gradient(135deg,#1e293b,#334155);color:#fff;padding:18px 0}
[data-theme="dark"] .site-header{background:linear-gradient(135deg,#111827,#1f2937)}
.topbar{max-width:1180px;margin:0 auto;padding:0 20px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:12px}
.brand-icon{font-size:30px}
.brand-text h1{font-size:20px;line-height:1.2}
.brand-sub{font-size:12px;opacity:.8}
.brand-link{display:flex;gap:12px;align-items:center;color:#fff}
.brand-link .brand-text strong{display:block;font-size:17px}
.controls{display:flex;gap:10px;align-items:center;flex:1;max-width:520px;min-width:240px}
.search-wrap{position:relative;flex:1}
.search-icon{position:absolute;left:12px;top:50%;transform:translateY(-50%);opacity:.6;font-size:14px}
#searchInput{width:100%;padding:10px 12px 10px 34px;border:1px solid rgba(255,255,255,.25);border-radius:10px;background:rgba(255,255,255,.08);color:#fff;font-size:14px;outline:none}
#searchInput::placeholder{color:rgba(255,255,255,.55)}
.btn{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);color:#fff;border-radius:10px;padding:9px 14px;cursor:pointer;font-size:14px}
.cat-nav{position:sticky;top:0;z-index:50;background:var(--bg);border-bottom:1px solid var(--border);box-shadow:0 1px 6px rgba(0,0,0,.04)}
.cat-nav-inner{max-width:1180px;margin:0 auto;padding:8px 12px;display:flex;gap:6px;overflow-x:auto;scrollbar-width:thin}
.cn-chip{flex-shrink:0;padding:5px 11px;border:1px solid var(--border);border-radius:999px;background:var(--card);color:var(--text);font-size:12.5px;white-space:nowrap}
.cn-chip:hover{border-color:var(--accent);color:var(--accent)}
.cn-chip.active{background:var(--accent);border-color:var(--accent);color:#fff}
.main{max-width:1180px;margin:0 auto;padding:20px}
.stats-bar{font-size:13px;color:var(--sub);margin-bottom:16px}
.breadcrumb{font-size:13px;color:var(--sub);margin-bottom:14px}
.breadcrumb a{color:var(--accent)}
.breadcrumb .sep{margin:0 6px;opacity:.5}
.overview{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.cat-card{display:block;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:16px 18px;transition:transform .15s,box-shadow .15s;color:var(--text)}
.cat-card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(79,70,229,.12);border-color:var(--accent)}
.cat-card-icon{font-size:26px;display:block;margin-bottom:6px}
.cat-card-title{font-size:16px;font-weight:700;display:block;margin-bottom:4px}
.cat-card-count{font-size:12px;color:var(--sub);display:block;margin-bottom:6px}
.cat-card-desc{font-size:12.5px;color:var(--sub);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cat-detail{margin-bottom:24px}
.cat-head{margin-bottom:22px}
.cat-detail-icon{font-size:34px}
.cat-detail-title{font-size:26px;margin:6px 0 4px;display:inline-block}
.cat-detail-count{font-size:13px;color:var(--sub);margin-left:10px}
.cat-detail-desc{font-size:14px;color:var(--sub);margin-top:4px}
.group{margin-bottom:26px;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:18px 20px}
.group-title{font-size:17px;margin-bottom:12px;display:flex;align-items:center;gap:8px}
.cat-count{font-size:12px;color:var(--sub);font-weight:400}
.group-items{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:10px}
.item{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:10px 12px;transition:border-color .15s}
.item:hover{border-color:var(--accent)}
.item-main{display:block;color:var(--text)}
.item-name{font-size:14px;font-weight:600;display:block}
.item-name .star{color:var(--star)}
.item-external{opacity:.4;font-size:11px;margin-left:4px}
.item-desc{font-size:12.5px;color:var(--sub);display:block;margin-top:2px}
.item-rels{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.item-rel{font-size:11px;padding:1px 8px;border-radius:99px;background:var(--accent-soft);color:var(--accent)}
.neighbor{display:flex;justify-content:space-between;gap:14px;margin:10px 0 24px}
.nb{flex:1;display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:12px 16px;color:var(--text)}
.nb:hover{border-color:var(--accent)}
.nb-text em{font-style:normal;font-size:11px;color:var(--sub);display:block}
.nb-text strong{font-size:14px}
.nb-arrow{font-size:18px;opacity:.5}
.nb-next{justify-content:flex-end;text-align:right}
.nb-empty{visibility:hidden}
.search-results{margin-bottom:20px}
.result-meta{font-size:13px;color:var(--sub);margin-bottom:10px}
.empty-tip{text-align:center;color:var(--sub);padding:50px 0;font-size:15px}
.empty-tip .big{font-size:40px;margin-bottom:8px}
.empty-tip span{font-size:12px}
.about{background:var(--card);border:1px solid var(--border);border-radius:14px;padding:24px 28px}
.about h1{font-size:24px;margin-bottom:12px}
.about h2{font-size:17px;margin:18px 0 8px}
.about p{font-size:14px;color:var(--sub);margin-bottom:8px}
.site-footer{border-top:1px solid var(--border);margin-top:30px;padding:22px 20px;font-size:12.5px;color:var(--sub)}
.footer-inner{max-width:1180px;margin:0 auto}
.site-footer p{margin-bottom:6px}
.top-btn{position:fixed;right:24px;bottom:24px;width:42px;height:42px;border-radius:50%;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:18px;cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s;z-index:60}
.top-btn.show{opacity:1;pointer-events:auto}
@media (max-width:640px){.topbar{flex-direction:column;align-items:stretch}.controls{max-width:none}.overview{grid-template-columns:repeat(auto-fill,minmax(160px,1fr))}.group-items{grid-template-columns:1fr}.cat-detail-title{font-size:21px}.nb-text strong{font-size:12.5px}}