/* ============================================================
   福兮 AI 门户 · 顶部导航样式（独立文件）
   供已有自定义样式的页面使用（如 scratch 作品集页），
   只包含导航栏相关规则，不污染页面其它样式。
   ============================================================ */
.nav{
  position:sticky;top:0;z-index:40;
  background:rgba(8,12,22,.72);
  border-bottom:1px solid rgba(255,255,255,.12);
  -webkit-backdrop-filter:blur(20px) saturate(160%);
  backdrop-filter:blur(20px) saturate(160%);
  font-family:-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
}
.nav *{box-sizing:border-box;margin:0;padding:0}
.nav-inner{
  max-width:1120px;margin:0 auto;padding:0 20px;
  display:flex;align-items:center;gap:18px;height:60px;
}
.nav .brand{
  display:inline-flex;align-items:center;gap:9px;text-decoration:none;color:#e8edf7;
  font-weight:800;letter-spacing:2px;font-size:15px;white-space:nowrap;flex-shrink:0;
}
.nav .brand-mark{
  display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:9px;font-size:16px;
  background:linear-gradient(135deg,rgba(74,168,255,.28),rgba(255,255,255,.05));
  border:1px solid rgba(255,255,255,.24);box-shadow:0 0 16px rgba(74,168,255,.3);
}
.nav .brand:hover .brand-mark{box-shadow:0 0 22px rgba(74,168,255,.5)}
.nav-links{
  display:flex;align-items:center;gap:4px;margin-left:auto;
  overflow-x:auto;scrollbar-width:none;
}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{
  display:inline-block;text-decoration:none;color:#9aa3b5;
  font-size:13px;letter-spacing:.5px;white-space:nowrap;
  padding:8px 13px;border-radius:9px;transition:.2s;
  border:1px solid transparent;
}
.nav-links a:hover{color:#e8edf7;background:rgba(255,255,255,.06)}
.nav-links a.active{
  color:#ffd76a;background:rgba(232,200,106,.1);
  border-color:rgba(232,200,106,.32);
}
@media (max-width:720px){
  .nav-inner{height:54px;gap:10px}
  .nav .brand-name{display:none}
}