/* ============================================================
   Reguvale 统一导航样式（单一源）
   由 _站点运维/导航/nav_sync.py 注入到全站页面
   选择器统一用 nav.navbar 前缀，确保能覆盖各页自带的内联样式

   2026-09-15 配色加深：
     · 底色改实色深藏青（去掉半透明 + backdrop-filter，避免被冲淡发灰）
     · 未选中项 #e3ecf7（原 #cdd9e8 偏浅）
     · 当前页高亮改实色蓝底白字 + 琥珀下划线（原半透明蓝底白字，对比度不足）
     · CTA 按钮改深色字（原白字压琥珀，对比度仅约 2.2:1，属无障碍缺陷）
   ============================================================ */

nav.navbar{
  position:sticky;top:0;z-index:1000;
  background:#0b1f33!important;
  border-bottom:1px solid rgba(255,255,255,.10);
  box-shadow:0 2px 16px rgba(0,0,0,.38);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
}
nav.navbar .navbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  height:66px;max-width:1200px;margin:0 auto;padding:0 20px;
}
nav.navbar .nav-logo{
  display:flex;align-items:center;gap:10px;flex:0 0 auto;
  color:#fff;font-weight:800;font-size:1.15rem;text-decoration:none;letter-spacing:-.01em;
}
nav.navbar .nav-logo img{height:34px;width:auto;border-radius:5px}
nav.navbar .nav-logo span{white-space:nowrap;color:#fff}

/* ---------- 一级菜单 ---------- */
nav.navbar .nav-links{display:flex;align-items:center;gap:2px;flex-wrap:nowrap}
nav.navbar .nav-item{position:relative;display:flex;align-items:center}

nav.navbar .nav-links > a,
nav.navbar .nav-item > a{
  display:inline-flex;align-items:center;gap:5px;
  color:#e3ecf7;font-size:.9rem;font-weight:600;line-height:1;
  padding:10px 12px;border-radius:8px;text-decoration:none;white-space:nowrap;
  transition:background .2s,color .2s;
}
nav.navbar .nav-links > a:hover,
nav.navbar .nav-item:hover > a,
nav.navbar .nav-item:focus-within > a{color:#fff;background:rgba(59,130,246,.40)}

/* 当前页：实色蓝底 + 白字 + 底部琥珀条 */
nav.navbar .nav-links > a.active,
nav.navbar .nav-item > a.active{
  color:#fff;background:#2563eb;font-weight:800;
  box-shadow:inset 0 -3px 0 0 #fbbf24;
}

/* 下拉箭头 */
nav.navbar .nav-caret{
  width:0;height:0;margin-left:1px;
  border-left:4px solid transparent;border-right:4px solid transparent;
  border-top:5px solid currentColor;opacity:.8;
  transition:transform .2s;
}
nav.navbar .nav-item:hover .nav-caret,
nav.navbar .nav-item:focus-within .nav-caret{transform:rotate(180deg)}

/* ---------- 二级菜单 ---------- */
nav.navbar .nav-sub{
  position:absolute;top:calc(100% + 4px);left:0;min-width:226px;z-index:1001;
  background:#0f2a44;border:1px solid rgba(255,255,255,.16);border-radius:10px;
  padding:8px;box-shadow:0 16px 40px rgba(0,0,0,.5);
  opacity:0;visibility:hidden;transform:translateY(6px);
  transition:opacity .18s ease,transform .18s ease,visibility .18s;
}
nav.navbar .nav-item:hover .nav-sub,
nav.navbar .nav-item:focus-within .nav-sub{opacity:1;visibility:visible;transform:translateY(0)}
nav.navbar .nav-sub a{
  display:block;color:#dbe6f3;font-size:.87rem;font-weight:600;
  padding:10px 12px;border-radius:7px;text-decoration:none;white-space:nowrap;
  transition:background .18s,color .18s;
}
nav.navbar .nav-sub a:hover{background:#2563eb;color:#fff}
nav.navbar .nav-sub a.active{color:#fff;background:#2563eb;font-weight:800}

/* ---------- 报价系统（琥珀实色）/ CTA ---------- */
nav.navbar .nav-quote{color:#fbbf24;font-weight:700}
nav.navbar .nav-quote:hover{color:#1a1205;background:#fbbf24}
nav.navbar .nav-quote.active{color:#1a1205;background:#fbbf24;box-shadow:inset 0 -3px 0 0 #fff}

nav.navbar .nav-cta{
  margin-left:8px;background:#f59e0b;color:#1a1205!important;
  padding:10px 18px;border-radius:8px;font-weight:800;
  box-shadow:0 4px 14px rgba(245,158,11,.35);
}
nav.navbar .nav-cta:hover,
nav.navbar .nav-cta.active{
  background:#fbbf24;color:#1a1205!important;
  box-shadow:inset 0 -3px 0 0 rgba(0,0,0,.25);
}

/* ---------- 汉堡按钮 ---------- */
nav.navbar .nav-toggle{
  display:none;flex-direction:column;gap:5px;cursor:pointer;
  background:0;border:0;padding:8px;margin-left:auto;
}
nav.navbar .nav-toggle span{width:23px;height:2.5px;background:#fff;border-radius:2px;transition:.2s}

/* ---------- 中等屏幕压缩 ---------- */
@media(min-width:721px) and (max-width:1280px){
  nav.navbar .nav-links > a,
  nav.navbar .nav-item > a{font-size:.83rem;padding:9px 8px}
  nav.navbar .nav-cta{margin-left:4px;padding:9px 12px}
}
@media(min-width:721px) and (max-width:1060px){
  nav.navbar .nav-links > a,
  nav.navbar .nav-item > a{font-size:.79rem;padding:8px 6px}
  nav.navbar .nav-logo span{display:none}
}

/* ---------- 移动端 ---------- */
@media(max-width:720px){
  nav.navbar .navbar-inner{height:58px}
  nav.navbar .nav-toggle{display:flex}
  nav.navbar .nav-links{display:none}
  nav.navbar .nav-links.open{
    display:flex;flex-direction:column;align-items:stretch;
    position:absolute;top:58px;left:0;right:0;
    background:#0b1f33;padding:12px 16px 16px;gap:2px;
    box-shadow:0 12px 30px rgba(0,0,0,.45);
    max-height:calc(100vh - 58px);overflow-y:auto;
  }
  nav.navbar .nav-links > a,
  nav.navbar .nav-item > a{padding:12px 10px;font-size:.95rem;color:#e3ecf7}
  nav.navbar .nav-item{display:block}
  nav.navbar .nav-item > a{display:flex}
  nav.navbar .nav-caret{display:none}
  nav.navbar .nav-sub{
    position:static;opacity:1;visibility:visible;transform:none;
    background:rgba(255,255,255,.07);box-shadow:none;border:0;
    border-radius:8px;margin:2px 0 6px;padding:4px 0 4px 10px;
  }
  nav.navbar .nav-sub a{padding:9px 12px;font-size:.87rem;color:#cfdcec}
  nav.navbar .nav-cta{margin:10px 0 0;text-align:center;justify-content:center}
}