header,
#header-wrap,
.header-content-wrap,
.content-wrap,
#headline-intro,
#testimonials,
#video,
article,
.container
{
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
}
article{max-width: 1280px}
#cssmenu-search-wrap{flex: 1}

.header-content-wrap{column-gap: 150px}