.site-header {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  background: #fff;
  padding: 16px 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-100%);
  transition: transform 0.35s ease, opacity 0.25s ease, visibility 0.35s ease;
  will-change: transform;
}
.site-header.is-fixed {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  box-shadow: 0 4px 18px rgba(6, 28, 61, 0.08);
}
.site-header > .container {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 1200px;
  height: 100%;
}
.brand {
  display: flex;
  flex: none;
  align-items: center;
  color: inherit;
  text-decoration: none;
}
.brand-logo {
  width: 42px;
  height: 42px;
  margin-right: 11px;
}
.brand-copy {
  display: flex;
  flex-direction: column;
}
.brand-copy strong {
  font-size: 16px;
  line-height: 1.5;
}
.brand-copy small {
  color: #A0A0A0;
  font-size: 12px;
  line-height: 1.5;
}
.navigation {
  display: flex;
  flex: 1;
  align-items: center;
  justify-content: flex-end;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-right: 45px;
}
.nav-links a {
  color: #424242;
  font-size: 16px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s ease;
}
.nav-links a:hover,
.nav-links a.active {
  color: #3870FF;
}
.header-actions {
  display: flex;
}
.action-group {
  display: none;
  gap: 12px;
}
.site-header.is-windows .action-group-win,
.site-header.is-mac .action-group-mac {
  display: flex;
}
.action {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  border: 1px solid;
  border-radius: 8px;
  font-size: 14px;
  padding: 0 18px;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.action img {
  flex: none;
  margin-left: 7px;
}
.action-download {
  border-color: #3870FF;
  background: #3870FF;
  color: #fff;
}
.action-download:hover {
  border-color: #1F56E3;
  background: #1F56E3;
  color: #fff;
}
.action-buy {
  border-color: #F9981D;
  background: #fff;
  color: #F9981D;
}
.action-buy:hover {
  background: #F9981D;
  color: #fff;
}
.cart-hover {
  display: none;
}
.action-buy:hover .cart-default {
  display: none;
}
.action-buy:hover .cart-hover {
  display: block;
}
.menu-toggle {
  display: none;
}
@media (max-width: 767px) {
  .site-header {
    height: auto;
    margin: 0 auto;
    padding: 0;
  }
  .site-header.is-fixed {
    margin-right: auto;
    margin-left: auto;
  }
  .site-header > .container {
    position: relative;
    display: block;
    width: 100%;
    padding: 0;
  }
  .brand {
    height: 54px;
    padding: 0 11px;
    border-bottom: 1px solid #eee;
  }
  .brand-logo {
    width: 32px;
    height: 32px;
    margin-right: 5px;
  }
  .brand-copy strong {
    font-size: 12px;
  }
  .brand-copy small {
    font-size: 10px;
  }
  .menu-toggle {
    position: absolute;
    top: 0;
    right: 0;
    display: block;
    width: 42px;
    height: 55px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
  }
  .menu-toggle img {
    position: absolute;
    top: 24px;
    left: 16px;
    width: 11px;
    height: 6px;
    transform: rotate(180deg);
    transition: transform 0.2s ease;
  }
  .site-header.collapsed .menu-toggle img {
    transform: rotate(0);
  }
  .navigation {
    display: block;
    overflow: hidden;
    max-height: 360px;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: max-height 0.3s ease, opacity 0.2s ease, visibility 0.3s ease, transform 0.3s ease;
  }
  .site-header.collapsed .navigation {
    max-height: 0;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px);
  }
  .nav-links {
    display: block;
    margin: 0;
  }
  .nav-links a {
    display: flex;
    align-items: center;
    height: 54px;
    padding: 0 46px;
    border-bottom: 1px solid #eee;
    font-size: 13px;
  }
  .nav-links a.active {
    color: #333;
  }
  .header-actions {
    padding: 17px 26px;
    justify-content: center;
  }
  .action-group {
    gap: 10px;
  }
  .action {
    height: 32px;
    border-radius: 5px;
    font-size: 12px;
    padding: 0 15px;
  }
  .action img {
    margin-left: 5px;
  }
  .action-download img {
    width: 16px;
    height: 16px;
  }
  .action-buy img {
    width: 16px;
    height: 16px;
  }
}