/* AI工具导航站 - 共享样式 */
:root{--bg:#f0f4ff;--card:#fff;--primary:#6366f1;--primary-light:#818cf8;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;--accent:#06b6d4}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
a{color:var(--primary);text-decoration:none}

/* Nav */
.topnav{background:#fff;border-bottom:1px solid var(--border);padding:12px 0;position:sticky;top:0;z-index:100}
.topnav .container{display:flex;align-items:center;gap:20px}
.topnav .logo{font-size:1.2rem;font-weight:700;color:var(--text)}
.topnav a{padding:4px 0;color:var(--muted);font-size:0.9rem}
.topnav a:hover,.topnav a.active{color:var(--primary);border-bottom:2px solid var(--primary)}

/* Tool detail page */
.tool-detail{padding:30px 0 50px}
.bread{font-size:0.85rem;color:var(--muted);margin-bottom:24px}
.bread a{color:var(--muted)}.bread a:hover{color:var(--primary)}
.tool-header{display:flex;align-items:center;gap:20px;margin-bottom:30px}
.tool-logo{width:56px;height:56px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;font-weight:800;color:#fff;flex-shrink:0}
.tool-header h1{font-size:1.8rem;font-weight:800}
.tool-subtitle{color:var(--muted);font-size:0.9rem;margin-top:2px}
.tool-tags{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.tag{background:#e0e7ff;color:var(--primary);padding:3px 10px;border-radius:6px;font-size:0.78rem;font-weight:500}
.tag-price{background:#fef3c7;color:#d97706}
.tag-featured{background:#fee2e2;color:#dc2626}
.tool-section{margin-bottom:28px}
.tool-section h2{font-size:1.2rem;font-weight:700;margin-bottom:10px}
.tool-section ul{padding-left:20px}
.tool-section ul li{margin-bottom:6px;color:var(--text)}
.tool-link{margin-top:10px}
.tool-link a{display:inline-block;background:var(--primary);color:#fff;padding:8px 20px;border-radius:8px;font-weight:600;font-size:0.9rem}
.tool-link a:hover{background:var(--primary-light)}

.tool-compare{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:28px}
.comp-card{border-radius:10px;padding:18px 20px}
.comp-card.pros{background:#ecfdf5;border:1px solid #a7f3d0}
.comp-card.cons{background:#fef2f2;border:1px solid #fecaca}
.comp-card h3{font-size:0.95rem;margin-bottom:8px}
.comp-card ul{padding-left:18px}
.comp-card ul li{margin-bottom:4px;font-size:0.88rem}

.tool-cta{text-align:center;margin:30px 0}
.tool-cta a{display:inline-block;background:linear-gradient(135deg,#6366f1,#06b6d4);color:#fff;padding:14px 40px;border-radius:12px;font-size:1.1rem;font-weight:700}
.tool-cta a:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(99,102,241,0.3)}
.tool-related{margin-top:30px;padding-top:20px;border-top:1px solid var(--border)}
.tool-related h3{font-size:1rem;margin-bottom:12px}
.related-links{display:flex;gap:10px;flex-wrap:wrap}
.related-links a{background:var(--card);border:1px solid var(--border);padding:6px 14px;border-radius:8px;font-size:0.85rem}

/* Footer */
footer{text-align:center;padding:30px 0;color:var(--muted);font-size:0.85rem;border-top:1px solid var(--border)}

/* Tools listing */
.tools-listing{padding:30px 0}
.tools-listing h1{font-size:1.6rem;margin-bottom:20px}
.tools-listing .count{font-size:1rem;color:var(--muted);font-weight:400}
.cat-filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.cat-filters .cf{background:var(--card);border:1px solid var(--border);padding:6px 14px;border-radius:8px;font-size:0.82rem;color:var(--text)}
.cat-filters .cf:hover{border-color:var(--primary);color:var(--primary)}
.tool-card-sm{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:16px;margin-bottom:10px}
.tool-card-sm:hover{border-color:var(--primary-light)}
.t-logo{width:40px;height:40px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:700;color:#fff;flex-shrink:0}
.t-info .t-name{font-weight:600;font-size:1rem}
.t-info .t-cat{font-size:0.75rem;color:var(--muted);margin-left:8px}
.t-info .t-desc{font-size:0.85rem;color:var(--muted);margin-top:4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

@media(max-width:640px){
  .tool-header{flex-direction:column;align-items:flex-start}
  .tool-compare{grid-template-columns:1fr}
  .tool-header h1{font-size:1.4rem}
}