/* 全站统一顶栏（首页 / 文档 / 接入指南 / 登录 / 注册） */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
}
.site-header-inner {
  max-width: 1560px;
  margin: 0 auto;
  padding: 0 32px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.site-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.15rem;
  color: #0f172a;
  text-decoration: none;
  flex-shrink: 0;
}
.site-brand:hover { text-decoration: none; color: #0f172a; }
.site-brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 36px;
  color: #64748b;
  font-size: 0.98rem;
}
.site-nav a {
  color: #64748b;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.15s;
}
.site-nav a:hover,
.site-nav a.active {
  color: #2563eb;
  text-decoration: none;
}
.site-header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-shrink: 0;
}
/* 登录：描边按钮（提高优先级，避免被页面 a{color:inherit} 冲掉） */
.site-header-actions a.site-btn-login,
a.site-btn-login {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  border: 1.5px solid #2563eb !important;
  background: #eff6ff !important;
  color: #2563eb !important;
  padding: 10px 18px !important;
  border-radius: 10px !important;
  font-weight: 700 !important;
  font-size: 0.95rem !important;
  line-height: 1.2 !important;
  text-decoration: none !important;
  box-shadow: none !important;
  transition: background 0.2s, color 0.2s, box-shadow 0.2s, transform 0.15s;
}
.site-header-actions a.site-btn-login:hover,
a.site-btn-login:hover {
  background: #2563eb !important;
  color: #fff !important;
  box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28) !important;
  transform: translateY(-1px);
  text-decoration: none !important;
}
.site-header-actions a.site-btn-login.active,
a.site-btn-login.active {
  background: #2563eb !important;
  color: #fff !important;
  border-color: #2563eb !important;
}
.site-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #2563eb;
  color: #fff !important;
  padding: 10px 20px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none !important;
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
  transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
}
.site-btn-primary:hover {
  background: #1d4ed8;
  transform: translateY(-1px);
  box-shadow: 0 14px 28px rgba(37, 99, 235, 0.28);
  color: #fff !important;
  text-decoration: none !important;
}
.site-btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #e2e8f0;
  background: #fff;
  color: #0f172a !important;
  padding: 10px 16px;
  border-radius: 10px;
  font-weight: 600;
  text-decoration: none !important;
  transition: border-color 0.2s, color 0.2s;
}
.site-btn-outline:hover {
  border-color: #2563eb;
  color: #2563eb !important;
  text-decoration: none !important;
}
@media (max-width: 960px) {
  .site-nav { display: none; }
  .site-header-inner { padding: 0 16px; height: 64px; gap: 10px; }
  .site-btn-outline { display: none; }
  .site-header-actions a.site-btn-login,
  a.site-btn-login { padding: 8px 12px !important; font-size: 0.9rem !important; }
  .site-btn-primary { padding: 8px 14px; }
}