:root{
  --bg:#f6f8fb;
  --card:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --primary:#2f7ed8;
  --primary-dark:#1e5fa8;
  --border:#e5e7eb;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);line-height:1.7;
  overflow-x:hidden;
}
.container{max-width:920px;margin:0 auto;padding:0 20px;}
.site-header{
  background:#fff;border-bottom:1px solid var(--border);
  position:sticky;top:0;z-index:10;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:60px;}
.logo{font-weight:700;font-size:1.1rem;color:var(--primary);text-decoration:none;}
.nav a{margin-left:20px;color:var(--text);text-decoration:none;font-size:.95rem;}
.nav a:hover{color:var(--primary);}
main{padding:40px 0 60px;}
.hero{text-align:center;padding:40px 0;}
.hero h1{font-size:2rem;margin-bottom:12px;}
.lead{color:var(--muted);font-size:1.05rem;max-width:600px;margin:0 auto 24px;}
.hero-actions{display:flex;gap:12px;justify-content:center;}
.btn{
  display:inline-block;padding:10px 22px;border-radius:8px;
  background:#fff;border:1px solid var(--border);color:var(--text);
  text-decoration:none;font-size:.95rem;transition:.15s;
}
.btn:hover{border-color:var(--primary);color:var(--primary);}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-dark);color:#fff;}
.cards{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin:30px 0;}
.card{
  background:var(--card);border:1px solid var(--border);border-radius:14px;
  padding:26px;text-decoration:none;color:var(--text);transition:.15s;
}
.card:hover{box-shadow:0 6px 20px rgba(0,0,0,.06);transform:translateY(-2px);}
.card-icon{font-size:1.8rem;margin-bottom:10px;}
.card h3{margin-bottom:8px;font-size:1.15rem;}
.card p{color:var(--muted);font-size:.92rem;}
.about{background:#fff;border:1px solid var(--border);border-radius:14px;padding:26px;margin-top:10px;}
.about h2{margin-bottom:12px;font-size:1.2rem;}
.about p{color:var(--muted);}

/* 文档页 */
.page-title{font-size:1.8rem;margin-bottom:8px;}
.page-desc{color:var(--muted);margin-bottom:28px;}
.doc-group{margin-bottom:30px;}
.doc-group h2{font-size:1.15rem;margin-bottom:12px;padding-left:10px;border-left:3px solid var(--primary);}
.doc-list{list-style:none;}
.doc-list li{
  display:flex;align-items:center;justify-content:space-between;
  background:#fff;border:1px solid var(--border);border-radius:10px;
  padding:14px 18px;margin-bottom:10px;
}
.doc-name{font-weight:500;}
.doc-tag{font-size:.8rem;color:var(--muted);background:#f1f5f9;padding:3px 10px;border-radius:20px;}

/* 工具页 */
.tool-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:18px;}
.tool-card{
  background:#fff;border:1px solid var(--border);border-radius:14px;
  padding:24px;position:relative;
}
.tool-card.soon{opacity:.7;}
.tool-icon{font-size:1.8rem;margin-bottom:10px;}
.tool-card h3{margin-bottom:8px;font-size:1.1rem;}
.tool-card p{color:var(--muted);font-size:.9rem;margin-bottom:14px;}
.tool-status{display:inline-block;font-size:.78rem;color:var(--primary);background:#eaf2fc;padding:3px 10px;border-radius:20px;}

.site-footer{background:#fff;border-top:1px solid var(--border);padding:24px 0;margin-top:40px;text-align:center;color:var(--muted);font-size:.85rem;}
.beian{margin-top:6px;}

@media(max-width:600px){
  .container{padding:0 16px;}
  .cards{grid-template-columns:1fr;}
  .hero h1{font-size:1.6rem;}
  .hero{padding:30px 0;}
  .hero-actions{flex-direction:column;gap:10px;}
  .hero-actions .btn{width:100%;text-align:center;}
  .doc-list li{flex-direction:column;align-items:flex-start;gap:6px;}
  .page-title{font-size:1.5rem;}
  .about{padding:20px 16px;}
  .header-inner{height:54px;}
  .nav a{margin-left:12px;font-size:.85rem;}
  .logo{font-size:1.05rem;}
  main{padding:24px 0 40px;}
}